Publications by authors named "Jinjin Li"

135 Publications

A novel free-standing metal organic frameworks-derived cobalt sulfide polyhedron array for shuttle effect suppressive lithium-sulfur batteries.

Nanotechnology 2021 Nov 24. Epub 2021 Nov 24.

Chinese Academy of Sciences - Intelligent Machines Institute, Science Island 1130 M B, Hefei 230026, Hefei, 230031, CHINA.

Metal-organic-foams (MOFs)-derived nanostructures have received broad attention for secondary batteries. However, common strategies are focusing on the preparation of dispersive materials, which need complicated steps and some additives for making electrodes of batteries. Here, we develop a novel free-standing Co9S8 polyhedron array derived from ZIF-67, which grows on a three-dimensional carbon cloth for lithium-sulfur (Li-S) battery. The polar Co9S8 provides strong chemical binding to immobilize polysulfides, which enables efficiently suppressing of the shuttle effect. The free-standing [email protected] polyhedron array-based cathode exhibits ultrahigh capacity of 1079 mAh g-1 after cycling 100 times at 0.1C, and long cycling life of 500 cycles at 1C, recoverable rate-performance and good temperature tolerance. Furthermore, the adsorption energies towards polysulfides are investigated by using density functional theory (DFT) calculations, which display a strong binding with polysulfides.
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http://dx.doi.org/10.1088/1361-6528/ac3ce5DOI Listing
November 2021

Modulus characterization of cells with submicron colloidal probes by atomic force microscope.

Microsc Res Tech 2021 Oct 27. Epub 2021 Oct 27.

School of Astronomy and Physics, Shanghai Jiao Tong University, Shanghai, China.

Colloidal probes have been increasingly demanded for the characterization of cellular modulus in atomic force microscope because of their well-defined geometry and large contact area with cell. In this work, submicron colloidal probes are prepared by scanning electron microscope/focused ion beam and compared with sharp tip and micron colloidal probe, in conjunction with loading velocity and indentation depth on the apparent elastic modulus. NIM and cartilage cells are used as specimens. The results show that modulus value measured by sharp tip changes significantly with loading velocity while remains almost stable by colloidal probes. Also, submicron colloidal probe is superior in characterizing the modulus with increasing indentation depth, which could help reveal the mechanical details of cellular membrane and the modulus of the whole cell. To test the submicron colloidal probe further, the modulus distribution map of cell is scanned with submicron colloidal probe of 50 nm radius during small and large indentation depths with high spatial resolution. The outcome of this work will provide the effective submicron colloidal probe according to the effect of loading velocity and indentation depth, characterizing the mechanical properties of the cells.
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http://dx.doi.org/10.1002/jemt.23957DOI Listing
October 2021

Near-infrared light-responsive hybrid hydrogels for the synergistic chemo-photothermal therapy of oral cancer.

Nanoscale 2021 Oct 21;13(40):17168-17182. Epub 2021 Oct 21.

State Key Laboratory of Oral Diseases, National Clinical Research Centre for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China.

Light-stimulus-responsive therapies have been recognized as a promising strategy for the efficient and safe treatment of oral squamous cell carcinoma (OSCC). Hydrogels have emerged as a promising multifunctional platform combining localized drug delivery and sustained drug release with multimodal properties for combined OSCC therapy. However, inaccurate drug release and limited light-absorption efficiency have hindered their on-demand chemo-photothermal applications. To tackle these problems, an injectable and near-infrared (NIR) light-responsive hybrid system was developed by incorporating light-responsive mesoporous silica nanoparticles (MSNs) as doxorubicin (DOX) carriers into the IR820/methylcellulose hydrogel networks for chemophotothermal therapy. Under NIR radiation, the incorporated IR820, a new green cyanine dye, was excited to induce photothermal effects against tumor cells. Meanwhile, MSNs achieved self-degradation-controlled DOX release the cleavage of diselenide bonds induced by reactive oxygen species. Through the combination of chemotherapy and phototherapy, a long-lasting synergistic anti-tumor effect was achieved and with less toxicity. These findings demonstrate the potential of light-responsive hydrogels as a multifunctional platform for accurate synergistic chemophotothermal treatment of OSCC.
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http://dx.doi.org/10.1039/d1nr04625jDOI Listing
October 2021

Preoperative Conization May Have a Positive Impact on Survival in Early-Stage Cervical Cancer: A Propensity-Matched Study.

Oncol Res Treat 2021 5;44(12):710-718. Epub 2021 Oct 5.

Department of Gynecology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.

Introduction: A recent prospective randomized study demonstrated that minimally invasive surgery (MIS) was inferior to open surgery in disease survival in early-stage cervical cancer. Our aim was to investigate whether there were survival benefits of preoperative conization prior to MIS for early-stage cervical cancer.

Methods: We retrospectively analyzed patients who eventually underwent definitive MIS with stage IA2 to IB1 (no >2 cm) squamous cell carcinoma, adenocarcinoma, and adenosquamous carcinoma. Preoperatively, the patients were separated into 2 groups: one managed with conization and the other undergoing biopsy without conization. Propensity scoring weight and matching were used to reduce the influence of possible allocation biases. The Cox regression model was used for univariate and multivariate analyses of disease recurrence and survival.

Results: 227 patients were contained in this study (99 patients in the conization group and 128 patients in the nonconization group). The 5-year DFS of the conization group was statistically better than that of the nonconization group (98.4% vs. 91.8%, p = 0.011). By univariate analysis, conization (HR = 0.11, 95% CI = 0.01-0.87, p = 0.03) and histologic cell type (p = 0.01) were considered as risk factors for recurrence. Multivariate analysis further confirmed conization (HR = 0.04, 95% CI = 0.01-0.51, p = 0.01) and histologic cell type (p < 0.01) correlated with DFS. After propensity score matching (1:1), 84 patients were included in the conization and nonconization groups, respectively, with 5-year DFS still higher in the conization group (98.3% vs. 92.9%, p = 0.037). The results after univariate and multivariate analyses were consistent with those prior to propensity score matching.

Conclusion: Preoperative conization in conjunction with MIS seemed to be a safe and feasible approach, with results that may have implications for the reduction of recurrence. Histologic cell type also impacted survival. Therefore, more future prospective studies are warranted.
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http://dx.doi.org/10.1159/000519646DOI Listing
October 2021

Cross-neutralizing antibodies bind a SARS-CoV-2 cryptic site and resist circulating variants.

Nat Commun 2021 09 27;12(1):5652. Epub 2021 Sep 27.

State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Life Sciences, School of Public Health, Xiamen University, 361102, Xiamen, Fujian, China.

The emergence of numerous variants of SARS-CoV-2, the causative agent of COVID-19, has presented new challenges to the global efforts to control the COVID-19 pandemic. Here, we obtain two cross-neutralizing antibodies (7D6 and 6D6) that target Sarbecoviruses' receptor-binding domain (RBD) with sub-picomolar affinities and potently neutralize authentic SARS-CoV-2. Crystal structures show that both antibodies bind a cryptic site different from that recognized by existing antibodies and highly conserved across Sarbecovirus isolates. Binding of these two antibodies to the RBD clashes with the adjacent N-terminal domain and disrupts the viral spike. Both antibodies confer good resistance to mutations in the currently circulating SARS-CoV-2 variants. Thus, our results have direct relevance to public health as options for passive antibody therapeutics and even active prophylactics. They can also inform the design of pan-sarbecovirus vaccines.
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http://dx.doi.org/10.1038/s41467-021-25997-3DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8476643PMC
September 2021

Oxidative Stress and Its Related Factors in Latent Autoimmune Diabetes in Adults.

Biomed Res Int 2021 13;2021:5676363. Epub 2021 Sep 13.

NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300134, China.

Aims: Few research was reported to explore oxidative stress in individuals with latent autoimmune diabetes in adults (LADA). Therefore, our goal is to study oxidative stress and related factors in LADA patients.

Methods: In this study, 250 Chinese inpatients were diagnosed with LADA ( = 110) and type 2 diabetes mellitus ( = 140) and 140 healthy volunteers were recruited. Moreover, individuals with LADA were followed for 6 months to evaluate whether short-term glycemic control during hospitalization can improve oxidative stress. Clinical and laboratory measurements of height, weight, blood pressure, glycosylated hemoglobin (HbA), blood lipids, 8-isoprostaglandin F2 (8-iso-PGF2), and superoxide dismutase (SOD) were performed. Stepwise multiple regression analyses were used to assess factors that related to oxidative stress in individuals with LADA.

Results: Compared with patients with type 2 diabetes, individuals with LADA have better oxidative stress and worse oxidative stress than healthy volunteers. After multiple regression analyses, systolic blood pressure, HbA, duration of diabetes, and diabetic retinopathy were associated with 8-iso-PGF2 and HbA. Diabetic retinopathy and diabetic ketosis were associated with SOD in individuals with LADA. Our results also revealed that, after 6 months of follow-up, oxidative stress was improved to some extent in persons with LADA.

Conclusions: Our results show that compared with type 2 diabetes, LADA means less oxidative stress, and compared with healthy volunteers, it means more oxidative stress. Systolic blood pressure, HbA, duration of diabetes, diabetic retinopathy, and ketosis were associated with oxidative stress in individuals with LADA. Furthermore, short-term glycemic control can improve oxidative stress to some extent in individuals with LADA.
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http://dx.doi.org/10.1155/2021/5676363DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8455198PMC
September 2021

Genome-wide identification of Pistacia R2R3-MYB gene family and function characterization of PcMYB113 during autumn leaf coloration in Pistacia chinensis.

Int J Biol Macromol 2021 Dec 20;192:16-27. Epub 2021 Sep 20.

Key Laboratory for Silviculture and Conservation, Ministry of Education, Beijing Forestry University, Beijing 100083, China.

Pistacia chinensis is known for its biodiesel production. Several varieties of this plant have leaves that produce anthocyanin, which is responsible for their reddish coloration in autumn. This reddish hue is what makes them useful as ornamental plants. However, the mechanism of anthocyanin accumulation during autumn leaf coloration remains unclear. R2R3-MYB proteins reportedly regulated anthocyanin biosynthesis in many plant species. Here, we performed a genome-wide analysis and expression profiles of R2R3-MYB transcription factor in Pistacia. A total of 158 R2R3-MYB proteins were identified and grouped into 32 clades. Combining the data from RNA-seq and qRT-PCR, one key gene, EVM0016534, was screened and identified to have the highest correlation with anthocyanin accumulation. It was named PcMYB113 due to its sequence similarity to AtMYB113 and it could bind to the promoter of PcF3H. Furthermore, ectopic expression of PcMYB113 in Arabidopsis promoted the accumulation of anthocyanin in the seed coat, cotyledon, and mature leaves, thus confirming the function of PcMYB113 in anthocyanin biosynthesis. In addition, PcMYB113 had a specifically higher expression in senesced red leaves than in mature green leaves and young red leaves in P. chinensis, thereby suggesting the potential role of PcMYB113 in promoting anthocyanin biosynthesis during autumn leaf coloration. These findings enrich our understanding of the function of R2R3-MYB genes in anthocyanin biosynthesis and autumn leaf coloration.
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http://dx.doi.org/10.1016/j.ijbiomac.2021.09.092DOI Listing
December 2021

Facile Synthesis of Thermoplastic Polyamide Elastomers Based on Amorphous Polyetheramine with Damping Performance.

Polymers (Basel) 2021 Aug 9;13(16). Epub 2021 Aug 9.

State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China.

Novel thermoplastic polyamide elastomers (TPAEs) consisting of long-chain semicrystalline polyamide 1212 (PA1212) and amorphous polyetheramine were synthesized via one-pot melt polycondensation. The method provides accessible routes to prepare TPAEs with a high tolerance of compatibility between polyamide and polyether oligomers compared with the traditional two-step method. These TPAEs with 10 wt % to 76 wt % of soft content were obtained by reaction of dodecanedioic acid, 1,12-dodecanediamine, and poly(propylene glycol) (PPG) diamine. The structure-property relationships of TPAEs were systematically studied. The chemical structure and the morphologic analyses have revealed that microphase separation occurs in the amorphous region. The TPAEs that have long-chain PPG segments consist of a crystalline polyamide domain, amorphous polyamide-rich domain, and amorphous polyetheramine-rich domain, while the ones containing short-chain PPG segments comprise of a crystalline polyamide domain and miscible amorphous polyamide phase and amorphous polyetheramine phase due to the compatibility between short-chain polyetheramine and amorphous polyamide. These novel TPAEs show good damping performance at low temperature, especially the TPAEs that incorporated 76 wt % and 62 wt % of PPG diamine. The TPAEs exhibit high elastic properties and low residual strain at room temperature. They are lightweight with density between 1.01 and 1.03 g/cm. The long-chain TPAEs have well-balanced properties of low density, high elastic return, and high shock-absorbing ability. This work provides a route to expand TPAEs to damping materials with special application for sports equipment used in extremely cold conditions such as ski boots.
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http://dx.doi.org/10.3390/polym13162645DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8397970PMC
August 2021

Expression of Concern: Arabidopsis COPPER TRANSPORTER 1 undergoes degradation in a proteasome-dependent manner.

J Exp Bot 2021 Oct;72(20):7337

Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin, China.

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http://dx.doi.org/10.1093/jxb/erab369DOI Listing
October 2021

Machine-Learning-Enabled Tricks of the Trade for Rapid Host Material Discovery in Li-S Battery.

ACS Appl Mater Interfaces 2021 Nov 19;13(45):53388-53397. Epub 2021 Aug 19.

Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Department of Micro/Nano-electronics, Shanghai Jiao Tong University, Shanghai 200240, China.

The shuttle effect has been a major obstacle to the development of lithium-sulfur batteries. The discovery of new host materials is essential, but lengthy and complex experimental studies are inefficient for the identification of potential host materials. We proposed a machine learning method for the rapid discovery of an AB-type sulfur host material to suppress the shuttle effect using the database, discovering 14 new structures (PdN, TaS, PtN, TaSe, AgCl, NbSe, TaTe, AgF, NiN, AuS, TmI, NbTe, NiBi, and AuBr) from 1320 AB-type compounds. These structures have strong adsorptions of greater than 1.0 eV for lithium polysulfides and appreciable electron-transportation capability, which can serve as the most promising AB-type host materials in lithium-sulfur batteries. On the basis of a small data set, we successfully predicted LiS adsorption at arbitrary sites on substrate materials using transfer learning, with a considerably low mean absolute error (below 0.05 eV). The proposed data-driven method, as accurate as density functional theory calculations, significantly shortens the research cycle of screening AB-type sulfur host materials by approximately 8 years. This method provides high-precision and expeditious solutions for other high-throughput calculations and material screenings based on adsorption energy predictions.
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http://dx.doi.org/10.1021/acsami.1c10749DOI Listing
November 2021

Application of Da Vinci robotic surgery system in cervical cancer: A single institution experience of 557 cases.

Asian J Surg 2021 Aug 6. Epub 2021 Aug 6.

Department of Gynecology, The First Affiliated Hospital of Chongqing Medical University, China. Electronic address:

Objective: Conflicting data have been published regarding the oncologic appropriateness of minimally invasive surgery (MIS) in the treatment of cervical cancer. The purpose of the present study was to investigate whether our experience in the treatment of early cervical cancer using a robotic surgical approach was safe and oncologically effective.

Methods: The data of 557 patients with cervical cancer treated by robotic surgery were retrospectively collected, including the perioperative and survival outcomes. Tumor stage was based on the International Federation of Gynecology and Obstetrics (FIGO 2009). The disease-free survival (DFS) and overall survival (OS) were calculated by the Kaplan-Meier method.

Results: Of the 557 patients, 196 (35.2%) patients were stage IA1 to IB1, and 304 (54.6%) patients were stage IB2 to I1A2. Also included were 57 (10.2%) patients with either recurrent or persistent disease following concurrent chemoradiotherapy. Two patients (0.4%) experienced severe intraoperative complications and 11 patients (2.0%) developed postoperative complications. A stratified analysis of survival was conducted in 91 patients who met a follow-up time of 3-year or more. The median follow-up time was 49 (range, 6-57) months. Both the 3-year DFS and OS of early-stage (stage IA1 to IB1) cervical cancer were 97.6%. For patients with locally advanced (stage IB2 to IIA2) disease, DFS and OS were 88.1% and 90.5%, respectively. The patients with recurrent or persistent disease had DFS and OS of 62.5%.

Conclusion: Our study results demonstrated that the robotic surgical approach could achieve satisfying therapeutic outcomes in patients with early-stage cervical cancer, with a low complication rate. For advanced cervical cancer patients with recurrent or persistent disease following concurrent chemoradiotherapy, robotic surgery undertaken as supplementary therapy may improve prognosis. However, there remains a need for additional prospective data reporting long-term survival of cervical cancer patients treated with a robotic surgical approach.
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http://dx.doi.org/10.1016/j.asjsur.2021.07.052DOI Listing
August 2021

Binding affinity and mechanisms of SARS-CoV-2 variants.

Comput Struct Biotechnol J 2021 26;19:4184-4191. Epub 2021 Jul 26.

Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Department of Micro/Nano-electronics, Shanghai Jiao Tong University, Shanghai 200240, China.

During the rapid worldwide spread of SARS-CoV-2, the viral genome has been undergoing numerous mutations, especially in the spike (S) glycoprotein gene that encode a type-I fusion protein, which plays an important role in the infectivity and transmissibility of the virus into the host cell. In this work, we studied the effect of S glycoprotein residue mutations on the binding affinity and mechanisms of SARS-CoV-2 using molecular dynamics simulations and sequence analysis. We quantitatively determined the degrees of binding affinity caused by different S glycoprotein mutations, and the result indicated that the 501Y.V1 variant yielded the highest enhancements in binding affinity (increased by 36.8%), followed by the N439K variant (increased by 29.5%) and the 501Y.V2 variant (increased by 19.6%). We further studied the structures, chemical bonds, binding free energies (enthalpy and entropy), and residue contribution decompositions of these variants to provide physical explanations for the changes in SARS-CoV-2 binding affinity caused by these residue mutations. This research identified the binding affinity differences of the SARS-CoV-2 variants and provides a basis for further surveillance, diagnosis, and evaluation of mutated viruses.
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http://dx.doi.org/10.1016/j.csbj.2021.07.026DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8312055PMC
July 2021

Identification of source information for sudden hazardous chemical leakage accidents in surface water on the basis of particle swarm optimisation, differential evolution and Metropolis-Hastings sampling.

Environ Sci Pollut Res Int 2021 Dec 10;28(47):67292-67309. Epub 2021 Jul 10.

School of Economics and Management, Fuzhou University, Fuzhou, 350116, China.

A quick and accurate identification of source information on sudden hazardous chemical leakage accident is crucial for early accident warning and emergency response. This study firstly regards source identification problem of sudden hazardous chemical leakage accidents as an inverse problem and presents a source identification model based on the Bayesian framework. Secondly, a new identification method is designed on the basis of particle swarm optimisation (PSO), differential evolution (DE) and the Metropolis-Hastings (M-H) sampling method. Lastly, the designed method, i.e. PSO-DE-MH, is verified by an outdoor experiment analyses in a section of the South-North Water Transfer Project. Results show that the number of iterations, the average absolute error, the average relative error and the average standard deviations of the identification results obtained by PSO-DE-MH are less than those of PSO-DE and DE-MH. Moreover, the relative error and the sampling relative error of the identification results under five different measurement errors (MEs) (σ = 0.01, 0.05, 0.1, 0.15, 0.2) are less than 9.5% and 0.2%, respectively. The designed method is effective even when the standard deviation of the ME increases to 0.2. Therefore, the designed method can effectively and accurately obtain the source information of sudden hazardous chemical leakage accidents. This study provides a new idea and method to solve the difficult problems of emergency management.
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http://dx.doi.org/10.1007/s11356-021-15132-6DOI Listing
December 2021

The adsorption properties of microporous activated carbon prepared from pistachio nut shell for low-concentration VOCs under low-medium temperatures.

Environ Sci Pollut Res Int 2021 Dec 6;28(46):65216-65228. Epub 2021 Jul 6.

Key Laboratory of Energy Thermal Conversion and Control, Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, Jiangsu, 210096, People's Republic of China.

The control of low-concentration VOCs in coal-fired flue gas is one of the research hotspots at present. In this work, KCO and KCO-KCl were employed to activate the agricultural wastes (pistachio nut shell) to prepare activated carbon (AC), named PSAC-1 and PSAC-2, respectively. By testing the adsorption performance of the prepared AC and commercial activated carbon (CAC) for the five target VOCs, it was observed that the adsorption capacity of PSAC-2 was the best compared to the other two. Particularly, the adsorption capacity of PSAC-2 (225 mg·g) for phenol was 3.8 times that of CAC (59 mg·g). In addition, the pseudo-first-order model, pseudo-second-order model, and Elovich model all fitted the adsorption process well, which indicated that both physical adsorption and chemical adsorption existed simultaneously, in which physical adsorption played a dominant role and chemical adsorption played a minor role. Weber-Morris kinetic model was used to illustrate the rate-controlling mechanism; the results confirmed that the stage of external membrane mass transfer was the control stage of adsorption rate. The results of this study can provide some references for the commercial production of biomass-derived AC and the removal of VOCs in coal-fired flue gas.
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http://dx.doi.org/10.1007/s11356-021-14586-yDOI Listing
December 2021

Shear-Induced Interfacial Structural Conversion Triggers Macroscale Superlubricity: From Black Phosphorus Nanoflakes to Phosphorus Oxide.

ACS Appl Mater Interfaces 2021 Jul 30;13(27):31947-31956. Epub 2021 Jun 30.

State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China.

As a new two-dimensional (2D) material, black phosphorus (BP) exhibits great potential for friction reduction. However, achieving macroscale superlubricity with a BP coating remains a great challenge. In this study, we designed a new lubrication system to achieve superlubricity with a BP coating at the macroscale, involving the formation of a BP coating with deposited BP nanoflakes, followed by water lubrication. Robust superlubricity with a coefficient of friction of 0.001 can be achieved on the BP coating in a pure water environment. The superlubricity mechanism is mainly attributed to the shear-induced interfacial structural conversion of BP to phosphorus oxide, leading to the formation of tribofilms on the friction pairs with extremely low shear strength. This finding provides a new strategy for achieving superlubricity of 2D material coatings at the macroscale, which has important implications for the development of novel superlubrication systems for industrial applications.
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http://dx.doi.org/10.1021/acsami.1c04664DOI Listing
July 2021

Survival outcomes of minimally invasive surgery for early-stage cervical cancer: A single-center, one surgeon, retrospective study.

Asian J Surg 2021 Jun 17. Epub 2021 Jun 17.

Department of Gynecology, The First Affiliated Hospital of Chongqing Medical University, China. Electronic address:

Objective: Recent studies have shown that minimally invasive surgery (MIS) is associated with a higher recurrence rate in patients with early-stage cervical cancer. In this study, we aim to report the survival outcomes of patients with early-stage cervical cancer who received MIS, performed in a single center by the same surgeon.

Methods: Eligible participants included patients with early-stage cervical cancer in stage IA1 with lymphovascular space invasion (LVSI+), IA2, and IB1. The surgeries were carried out by a single surgeon and survival outcomes of the 137 patients were evaluated retrospectively.

Results: The median follow-up time for the 137 patients was 53 (25-94) months, with the five-year disease-free survival (DFS) rate of 96.4% and the five-year overall survival (OS) rate of 96.8%. Among them, six (4.38%) patients relapsed and four (2.92%) of whom died. The five-year DFS rate was significantly higher in patients with tumor≤2 cm in size than in those with tumor >2 cm (P = 0.013), however, with no significant difference in the five-year OS rate (P = 0.219).

Conclusion: According to the existing literature and the results of this study, for MIS, the proficiency levels of a surgeon may be associated with survival outcomes of cancer patients. Tumor size may also be an important factor affecting survival outcomes of cervical cancer patients.
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http://dx.doi.org/10.1016/j.asjsur.2021.05.037DOI Listing
June 2021

Race, health, and socioeconomic disparities associated with malingering in psychiatric patients at an urban emergency department.

Gen Hosp Psychiatry 2021 Jul-Aug;71:121-127. Epub 2021 May 29.

University of Chicago Medical Center, 5841 S Maryland Ave, Chicago, IL 60637, USA.

Objective: To examine clinical and sociodemographic differences between psychiatric patients suspected of malingering and non-malingering controls in an urban emergency department (ED) setting.

Methods: We used retrospective chart review to compare 57 psychiatric patients suspected of malingering with 195 date-matched controls. We examined evidence used for malingering and documented secondary gains.

Results: The prevalence of malingering was 5.6-7.1%, with documented evidence consistent with DSM-V guidelines. Malingering patients were more likely to be male (p < .001), > 45 years old (p = .002), Black (p = .049), unhoused (p < .001), and frequent users of ED (p < .001). Psychiatric diagnoses were found in ~75% of malingerers. Diagnosis of antisocial personality (OR = 8.03, p = .013) and substance use disorder (OR = 2.05, p = .018) predicted increased probability of malingering. Malingering encounters were more likely to result in discharges (p < .001). The most common secondary gains were unmet clinical needs.

Conclusions: Results support adaptational models of malingering. Malingering patients are more likely to have sociodemographic vulnerabilities. A disproportionate number of malingering patients have unmet needs for psychiatric treatment and resources. The study provides further evidence for inequities that may be related to social and structural determinants of health.
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http://dx.doi.org/10.1016/j.genhosppsych.2021.05.009DOI Listing
May 2021

High precision implicit function learning for forecasting supercapacitor state of health based on Gaussian process regression.

Sci Rep 2021 06 8;11(1):12112. Epub 2021 Jun 8.

National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Shanghai Jiao Tong University, Shanghai, 200240, China.

State of health (SOH) prediction of supercapacitors aims to provide reliable lifetime control and avoid system failure. Gaussian process regression (GPR) has emerged for SOH prediction because of its capability of capturing nonlinear relationships between features, and tracking SOH attenuations effectively. However, traditional GPR methods based on explicit functions require multiple screenings of optimal mean and covariance functions, which results in data scarcity and increased time consumption. In this study, we propose a GPR-implicit function learning, which is a prior knowledge algorithm for calculating mean and covariance functions from a preliminary data set instead of screening. After introducing the implicit function, the average root mean square error (Average RMSE) is 0.0056 F and the average mean absolute percent error (Average MAPE) is 0.6%, where only the first 5% of the data are trained to predict the remaining 95% of the cycles, thereby decreasing the error by more than three times than previous studies. Furthermore, less cycles (i.e., 1%) are trained while still obtaining low prediction errors (i.e., Average RMSE is 0.0094 F and Average MAPE is 1.01%). This work highlights the strength of GPR-implicit function model for SOH prediction of energy storage devices with high precision and limited property data.
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http://dx.doi.org/10.1038/s41598-021-91241-zDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8187390PMC
June 2021

Circular RNA circ_0003028 contributes to tumorigenesis by regulating GOT2 via miR-1298-5p in non-small cell lung cancer.

Bioengineered 2021 12;12(1):2326-2340

Department of Thoracic Surgery, Jianhu Hospital Affiliated to Nantong University, Yancheng, China.

Non-small cell lung cancer (NSCLC) is a common malignant tumor, with high morbidity and mortality. Circular RNA (circRNA) circ_0003028 was reported to be upregulated in NSCLC. This study is designed to explore the role and mechanism of circ_0003028 on NSCLC progression. In this work, circ_0003028, microRNA-1298-5p (miR-1298-5p), and glutamic oxaloacetic transaminase 2 (GOT2) level were detected by real-time quantitative polymerase chain reaction (RT-qPCR). The localization of circ_0003028 was analyzed by subcellular fractionation assay. Cell proliferation, colony number, cell cycle progression, apoptosis, migration, invasion, and angiogenesis were measured by Cell Counting Kit-8 (CCK-8), colony formation, flow cytometry, transwell, and tube formation assays. Protein levels of Beclin1, light chain 3 (LC3)-II/LC3-I, GOT2, proliferating cell nuclear antigen (PCNA) were examined by western blot assay. The binding relationship between miR-1298-5p and circ_0003028 or GOT2 was predicted by circular RNA Interactome or starbase and then verified by dual-luciferase reporter, RNA Immunoprecipitation (RIP), and RNA pull-down assays. The biological role of circ_0003028 on NSCLC tumor growth was examined by the xenograft tumor model . We reported that circ_0003028 and GOT2 were upregulated, and miR-1298-5p was decreased in NSCLC tissues and cells. Moreover, circ_0003028 knockdown curbed cell proliferative ability, migration, invasion, angiogenesis, and facilitate apoptosis and autophagy in NSCLC cells . Mechanical analysis discovered that circ_0003028 regulated GOT2 expression by sponging miR-1298-5p. Circ_0003028 silencing hindered the cell growth of NSCLC . Taken together, circ_0003028 knockdown could suppress NSCLC progression partly by regulating the miR-1298-5p/GOT2 axis, providing an underlying therapeutic target for NSCLC.
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http://dx.doi.org/10.1080/21655979.2021.1935064DOI Listing
December 2021

Media exposure predicts acute stress and probable acute stress disorder during the early COVID-19 outbreak in China.

PeerJ 2021 10;9:e11407. Epub 2021 May 10.

School of Psychology, Guizhou Normal University, Guiyang, Guizhou, China.

Background: The COVID-19 has led to unprecedented psychological stress on the general public. However, the associations between media exposure to COVID-19 and acute stress responses have not been explored during the early COVID-19 outbreak in China.

Methods: An online survey was conducted to investigate the relationships between media exposure to COVID-19 and acute stress responses, and to recognize associated predictors of acute stress responses on a sample of 1,450 Chinese citizens from February 3 to February 10, 2020. Media exposure questionnaire related to COVID-19 was developed to assess media exposure time, media exposure forms and media exposure content. The Stanford Acute Stress Reaction Questionnaire (SASRQ) was used to measure acute stress responses, including continuous acute stress symptom scores and the risk of probable acute stress disorder (ASD). A series of regression analyses were conducted.

Results: Longer media exposure time and social media use were associated with higher acute stress and probable ASD. Viewing the situation of infected patients was associated with higher acute stress, whereas viewing the latest news about pandemic data was associated with lower odds of probable ASD. Being females, living in Hubei Province, someone close to them diagnosed with COVID-19, history of mental illness, recent adverse life events and previous collective trauma exposure were risk factors for acute stress responses.

Conclusions: These findings confirmed the associations between indirect media exposure to pandemic events and acute stress responses. The governments should be aware of the negative impacts of disaster-related media exposure and implement appropriate interventions to promote psychological well-being following pandemic events.
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http://dx.doi.org/10.7717/peerj.11407DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8117928PMC
May 2021

Machine learning builds full-QM precision protein force fields in seconds.

Brief Bioinform 2021 Nov;22(6)

Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Department of Micro/Nano Electronics, Shanghai Jiao Tong University, China.

Full-quantum mechanics (QM) calculations are extraordinarily precise but difficult to apply to large systems, such as biomolecules. Motivated by the massive demand for efficient calculations for large systems at the full-QM level and by the significant advances in machine learning, we have designed a neural network-based two-body molecular fractionation with conjugate caps (NN-TMFCC) approach to accelerate the energy and atomic force calculations of proteins. The results show very high precision for the proposed NN potential energy surface models of residue-based fragments, with energy root-mean-squared errors (RMSEs) less than 1.0 kcal/mol and force RMSEs less than 1.3 kcal/mol/Å for both training and testing sets. The proposed NN-TMFCC method calculates the energies and atomic forces of 15 representative proteins with full-QM precision in 10-100 s, which is thousands of times faster than the full-QM calculations. The computational complexity of the NN-TMFCC method is independent of the protein size and only depends on the number of residue species, which makes this method particularly suitable for rapid prediction of large systems with tens of thousands or even hundreds of thousands of times acceleration. This highly precise and efficient NN-TMFCC approach exhibits considerable potential for performing energy and force calculations, structure predictions and molecular dynamics simulations of proteins with full-QM precision.
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http://dx.doi.org/10.1093/bib/bbab158DOI Listing
November 2021

Curcumin reverses doxorubicin resistance in colon cancer cells at the metabolic level.

J Pharm Biomed Anal 2021 Jul 7;201:114129. Epub 2021 May 7.

Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Co-innovation Center of Henan Province for New Drug R&D and Preclinical Safety, School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, Henan, 450001, China. Electronic address:

Doxorubicin (Dox) is commonly used for the treatment of malignant tumors, including colon cancer. However, the development of P-glycoprotein (P-gp)-mediated multidrug resistance (MDR) in tumor chemotherapy has seriously reduced the therapeutic efficacy of Dox. Natural product curcumin (Cur) was demonstrated to have a variety of pharmacological effects, such as anti-tumor, anti-oxidation and anti-aging activities. Here, we examined the MDR reversal capability of Cur in drug sensitive-(SW620) and resistant-(SW620/Ad300) colon cancer cells, and elucidated the underlying molecular mechanisms at the metabolic level. It was found that Cur reversed P-gp-mediated resistance in SW620/Ad300 cells by enhancing the Dox-induced cytotoxicity and apoptosis. Further mechanistic studies indicated that Cur inhibited the ATP-dependent transport activity of P-gp, thereby increasing the intra-celluar accumulation of Dox in drug-resistant cells. Metabolomics analysis based on UPLC-MS/MS showed that the MDR phenomenon in SW620/Ad300 cells was closely correlated with the upregulation of spermine and spermidine synthesis and D-glutamine metabolism. Cur significantly inhibited the biosynthesis of spermine and spermidine by decreasing the expression of ornithine decarboxylase (ODC) and suppressed D-glutamine metabolism, which in turn decreased the anti-oxidative stress ability and P-gp transport activity of SW620/Ad300 cells, eventually reversed MDR. These findings indicated the MDR reversal activity and the related mechanism of action of Cur, suggesting that Cur could be a promising MDR reversal agent for cancer treatment.
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http://dx.doi.org/10.1016/j.jpba.2021.114129DOI Listing
July 2021

Tissue specificity of (E)-β-farnesene and germacrene D accumulation in pyrethrum flowers.

Phytochemistry 2021 Jul 28;187:112768. Epub 2021 Apr 28.

Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, China. Electronic address:

Plant defensive mimicry based on the aphid alarm pheromone (E)-β-farnesene (EβF) was previously shown to operate in Tanacetum cinerariifolium (Asteraceae) flowers. Germacrene D (GD), is another dominant volatile of T. cinerariifolium flowers and may modulate both defense and pollination. Here, we find that the increase in GD/EβF ratio at later developmental stages is correlated with the tissue distribution in the flower head: the total content of EβF and GD is similar, but GD accumulates comparatively more in the upper disk florets. Naphthol and N, N-dimethyl-p-phenylenediamine dihydrochloride (NADI)-stained purple ducts containing EβF and GD, were observed in the five petal lips of the corolla and two-lobed stigma of disk florets. By contrast in the peduncle, EβF accounts for nearly 80% of total terpenes, compared to 5% for GD. EβF is accumulated inside inner cortex cells and parenchyma cells of the pith in young peduncle. This is followed by the formation of terpene-filled axial secretory cavities parallel to the vascular bundles. In conclusion, the observed developmental and diurnal emissions of different EβF/GD ratios appear to be regulated by their tissue distribution.
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http://dx.doi.org/10.1016/j.phytochem.2021.112768DOI Listing
July 2021

Fluorination to enhance superlubricity performance between self-assembled monolayer and graphite in water.

J Colloid Interface Sci 2021 Aug 26;596:44-53. Epub 2021 Mar 26.

State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China. Electronic address:

Hypothesis: Achievement of superlubricity is an effective method to reduce friction and wear, which has a prominent influence on the operational efficiency and lifetime of a device. However, some burning issues still remain to be solved for the practical applications of superlubricity, such as the poor load-bearing capacity, especially in liquid superlubricity. Therefore, exploring an effective method to enhance the superlubricity performance is essential to accelerate the application of superlubricity.

Experiments: The friction properties between two different self-assembled monolayers (SAMs)-a perfluorocarbon SAM and a hydrocarbon SAM-and graphite in water were explored and compared by atomic force microscopy (AFM).

Findings: Enhanced superlubricity performance due to the fluorination was observed. Specifically, we observed an approximately 85% reduction of the friction coefficient after fluorination, and superlubricity was achieved with extremely low friction coefficient of 0.0003. Moreover, 2.4-fold greater load-bearing capacity of the superlubricity was obtained after fluorination. The molecular origin of the superlubricity enhancement by fluorination was revealed by molecular dynamics (MD) simulations, indicating that the greater load-bearing capacity of the perfluorocarbon SAM was ascribed to the enhanced interaction between the water and SAM by fluorination to form a more robust layered water structure confined in the contact zone, which played a pivotal role in the superlubricity.
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http://dx.doi.org/10.1016/j.jcis.2021.03.133DOI Listing
August 2021

18β-Glycyrrhetinic acid alleviates demyelination by modulating the microglial M1/M2 phenotype in a mouse model of cuprizone-induced demyelination.

Neurosci Lett 2021 06 1;755:135871. Epub 2021 Apr 1.

Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan University, Wuhan, Hubei, PR China. Electronic address:

This research aimed to examine the nutritious supplementary function of 18β-Glycyrrhetinic acid (18β-GA) in moderating the myelin sheath destruction and behavioral impairments observed in the cuprizone model of demyelination. Mice were fed daily on food containing cuprizone (0.3 %) and given doses of 18β-GA (5 or 1 mg/kg) for a period of five weeks. The groups treated with 18β-GA exhibited improvements in exploratory behavior, locomotive activity, and weight. As assessed using luxol-fast blue and myelin basic protein (MBP) staining, which were used to detect demyelination in the brain, 18β-GA both reduced and prevented instances of cuprizone-induced demyelinating lesions; treatment with 18β-GA also caused the MBP level in the corpus callosum to increase. Furthermore, alongside these positive results following 18β-GA treatment, microglial polarisation was also observed to shift towards the beneficial M2 phenotype. The results of this research thus indicate the potential clinical application of 18β-GA for the prevention of myelin damage and behavioral dysfunction.
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http://dx.doi.org/10.1016/j.neulet.2021.135871DOI Listing
June 2021

Tin Oxide Encapsulated into Pyrolyzed Chitosan as a Negative Electrode for Lithium Ion Batteries.

Materials (Basel) 2021 Mar 1;14(5). Epub 2021 Mar 1.

Faculty of Chemistry, Gdańsk University of Technology, 80-233 Gdańsk, Poland.

Tin oxide is one of the most promising electrode materials as a negative electrode for lithium-ion batteries due to its higher theoretical specific capacity than graphite. However, it suffers lack of stability due to volume changes and low electrical conductivity while cycling. To overcome these issues, a new composite consisting of SnO2 and carbonaceous matrix was fabricated. Naturally abundant and renewable chitosan was chosen as a carbon source. The electrode material exhibiting 467 mAh g-1 at the current density of 18 mA g-1 and a capacity fade of only 2% after 70 cycles is a potential candidate for graphite replacement. Such good electrochemical performance is due to strong interaction between amine groups from chitosan and surface hydroxyl groups of SnO2 at the preparation stage. However, the charge storage is mainly contributed by a diffusion-controlled process showing that the best results might be obtained for low current rates.
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http://dx.doi.org/10.3390/ma14051156DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7957769PMC
March 2021

Ab initio determination of crystal stability of di-p-tolyl disulfide.

Sci Rep 2021 Mar 29;11(1):7076. Epub 2021 Mar 29.

Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Department of Micro/Nano-Electronics, Shanghai Jiao Tong University, Shanghai, 200240, China.

With the rapid growth of energy demand and the depletion of existing energy resources, the new materials with superior performances, low costs and environmental friendliness for energy production and storage are explored. Di-p-tolyl disulfide (p-TolS) is a typical lubricating material, which has been applied in the field of energy storage. The conformational properties and phase transformations of p-TolS have been studied by pioneers, but their polymorphs and the polymorphism induced crystal structure changes require further analysis. In this study, we perform the crystal structural screening, prediction and optimization of p-TolS crystal with quantum mechanical calculations, i.e., density functional theory (DFT) and second-order Møller-Plesset perturbation (MP2) methods. A series of crystal structures with different molecular arrangements are generated based on the crystal structure screening. As compared to long-established lattice energy calculation, we take an advantage of using more accurate technique, which is Gibbs free energy calculation. It considers the effects of entropy and temperature to predict the crystal structures and energy landscape. By comparing the Gibbs free energies between predicted and experimental structures, we found that phase α is the most stable structure for p-TolS crystal at ambient temperature and standard atmospheric pressure. Furthermore, we provide an efficient method to discriminate different polymorphs that are otherwise difficult to be identified based on the Raman/IR spectra. The proposed work enable us to evaluate the quality of various crystal polymorphs rapidly.
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http://dx.doi.org/10.1038/s41598-021-86519-1DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8007795PMC
March 2021

Magneto-Electrically Enhanced Intracellular Catalysis of FePt-FeC Heterostructures for Chemodynamic Therapy.

Adv Mater 2021 Apr 23;33(17):e2100472. Epub 2021 Mar 23.

Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China.

Intracellular catalytic reactions can tailor tumor cell plasticity toward high-efficiency treatments, but the application is hindered by the low efficiency of intracellular catalysis. Here, a magneto-electronic approach is developed for efficient intracellular catalysis by inducing eddy currents of FePt-FeC heterostructures in mild alternating magnetic fields (frequency of f = 96 kHz and amplitude of B ≤ 70 mT). Finite element simulation shows a high density of induced charges gathering at the interface of FePt-FeC heterostructure in the alternating magnetic field. As a result, the concentration of an essential coenzyme-β-nicotinamide adenine dinucleotide-in cancer cells is significantly reduced by the enhanced catalytic hydrogenation reaction of FePt-FeC heterostructures under alternating magnetic stimulation, leading to over 80% of senescent cancer cells-a vulnerable phenotype that facilitates further treatment. It is further demonstrated that senescent cancer cells can be efficiently killed by the chemodynamic therapy based on the enhanced Fenton-like reaction. By promoting intracellular catalytic reactions in tumors, this approach may enable precise catalytic tumor treatment.
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http://dx.doi.org/10.1002/adma.202100472DOI Listing
April 2021

Insulin injections inhibits PTZ-induced mitochondrial dysfunction, oxidative stress and neurological deficits via the SIRT1/PGC-1α/SIRT3 pathway.

Biochim Biophys Acta Mol Basis Dis 2021 06 13;1867(6):166124. Epub 2021 Mar 13.

Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan University, Wuhan, Hubei, China. Electronic address:

With an associated 20% death risk, epilepsy mainly involves seizures of an unpredictable and recurrent nature. This study was designed to evaluate the neuroprotective effects and underlying mechanisms of insulin on mitochondrial disruption, oxidative stress, cell apoptosis and neurological deficits after epilepsy seizures. Mice were exposed to repetitive injections of pentylenetetrazol at a dose of 37 mg per kg. The influence of insulin was assessed by many biochemical assays, histopathological studies and neurobehavioral experiments. The administration of insulin was proven to increase the latency of seizures while also decreasing their intensity. It also caused a reversal of mitochondrial dysfunction and ameliorated oxidative stress. Additionally, insulin pretreatment upregulated Bcl-2, downregulated Bax, and then played a neuroprotective role against hippocampal neuron apoptosis. Furthermore, when insulin was administered, SIRT1/PGC-1α/SIRT3 signals were activated, possibly due to the fact that insulin's neuroprotective and anti-mitochondrial damage characteristics added to its observed antiepileptic functions. Finally, insulin treatment is thus extremely valuable for effecting improvements in neurological functions, as has been estimated in a series of functional tests. In conclude, the results of this study consequently demonstrate insulin to have significant potential for future application in epilepsy management.
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http://dx.doi.org/10.1016/j.bbadis.2021.166124DOI Listing
June 2021

Discernibility Measures for Fuzzy β Covering and Their Application.

IEEE Trans Cybern 2021 Mar 9;PP. Epub 2021 Mar 9.

As a combination of fuzzy sets and covering rough sets, fuzzy β covering has attracted much attention in recent years. The fuzzy β neighborhood serves as the basic granulation unit of fuzzy β covering. In this article, a new discernibility measure with respect to the fuzzy β neighborhood is proposed to characterize the distinguishing ability of a fuzzy covering family. To this end, the parameterized fuzzy β neighborhood is introduced to describe the similarity between samples, where the distinguishing ability of a given fuzzy covering family can be evaluated. Some variants of the discernibility measure, such as the joint discernibility measure, conditional discernibility measure, and mutual discernibility measure, are then presented to reflect the change of distinguishing ability caused by different fuzzy covering families. These measures have similar properties as the Shannon entropy. Finally, to deal with knowledge reduction with fuzzy β covering, we formalize a new type of decision table, that is, fuzzy β covering decision tables. The data reduction of fuzzy covering decision tables is addressed from the viewpoint of maintaining the distinguishing ability of a fuzzy covering family, and a forward attribute reduction algorithm is designed to reduce redundant fuzzy coverings. Extensive experiments show that the proposed method can effectively evaluate the uncertainty of different types of datasets and exhibit better performance in attribute reduction compared with some existing algorithms.
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http://dx.doi.org/10.1109/TCYB.2021.3054742DOI Listing
March 2021
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