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Health risk assessment of trace metal(loid)s in agricultural soils based on Monte carlo simulation coupled with positive matrix factorization model in chongqing, southwest china

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Journal of Mountain Science 2024年第1期21卷 100-112页

作者： MA Jie cHU Lijuan SUN Jing WANG Shenglan ge Miao DENG Li chongqing Ecological and Environmental Monitoring center Chongqing 401147China Key Laboratory of Organic Pollutants in Environmental chemical Behavior and Ecological Toxicology of chongqing Chongqing 401147China Department of Pediatrics Chongqing Health Center for Women and ChildrenChongqing 401147China Department of Pediatrics Women and Children’s Hospital of Chongqing Medical UniversityChongqing 401147China

This study aimed to investigate the pollution characteristics, source apportionment, and health risks associated with trace metal(loid)s(TMs) in the major agricultural producing areas in chongqing, china. We analyzed the source apportionment and assessed the health risk of TMs in agricultural soils by using positive matrix factorization(PMF) model and health risk assessment(HRA) model based on Monte carlo simulation. Meanwhile, we combined PMF and HRA models to explore the health risks of TMs in agricultural soils by different pollution sources to determine the priority control factors. Results showed that the average contents of cadmium(cd), arsenic (As), lead(Pb), chromium(cr), copper(cu), nickel(Ni), and zinc(zn) in the soil were found to be 0.26, 5.93, 27.14, 61.32, 23.81, 32.45, and 78.65 mg/kg, respectively. Spatial analysis and source apportionment analysis revealed that urban and industrial sources, agricultural sources, and natural sources accounted for 33.0%, 27.7%, and 39.3% of TM accumulation in the soil, respectively. In the HRA model based on Monte carlo simulation, noncarcinogenic risks were deemed negligible(hazard index carcinogenic risks were at acceptable level(10^(-6)carcinogenic risk ≤ 10^(-4)), with higher risks observed for children compared to adults. The relationship between TMs, their sources, and health risks indicated that urban and industrial sources were primarily associated with As, contributing to 75.1% of carcinogenic risks and 55.7% of non-carcinogenic risks, making them the primary control factors. Meanwhile, agricultural sources were primarily linked to cd and Pb, contributing to 13.1% of carcinogenic risks and 21.8% of non-carcinogenic risks, designating them as secondary control factors.

关键词： Monte carlo simulation Health risk assessment Trace metal(loid)s Positive matrix factorization Agricultural soils

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Recent Advances in 0D Ni/co-based Hollow Electrocatalysts for Electrochemical Water Splitting

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chemical Research in chinese Universities 2024年第3期40卷 437-450页

作者： ge Wenjing cHEN Xiaocui MA Ruizhao zHENG Siyuan SHANG Ningzhao zHAO Xiaoxian Department of chemistry College of ScienceHebei Agricultural UniversityBaoding 071001P.R.China

Electrochemical water splitting using renewable energy sources has been recognized as a sustainable way to produce hydrogen energy due to the characteristics of low-carbon and no ***,the slow hydrogen/oxygen evolution reactions(HER/OER)seriously hinder the practical application of large-scale water *** this paper,the 0D Ni/co-based hollow material is discussed in detail because of adjustable morphology,low mass density and abundant active sites,which provides an effective solution for improving the HER/OER reaction *** synthesis methods of hollow materials,such as hard template,soft template and self-template are ***,catalysts with different structural designs of hollow structures are reviewed,including hollow single-shelled structure,hollow core-shelled structure,hollow double-shelled structure and hollow multi-shelled structure(HoMS)***,the research progress of the 0D Ni/co-based HoMS electrocatalysts in recent years and their prominent performances in water splitting are ***,the challenges and development prospects of designing Ni/co-based HoMS catalysts in water splitting in the future are discussed.

关键词： Electrochemical watersplitting Morphological regulation Hollow structure Hollow multi-shelled structure(HoMS)

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A healable, mechanically robust and ultrastretchable ionic conductive elastomer for durably wearable sensor

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Nano Research 2024年第4期17卷 3369-3378页

作者： Guoxian zhang chunmei Li JiaoJun Tan Mingqi Wang Yafeng Ren Feijie ge Qiuyu zhang Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi'an 710072China college of Bioresources chemical and Materials Engineering National Demonstration Center for Experimental Light Chemistry Engineering EducationShaanxi University of Science&TechnologyXi’an 710021China

The ionic conductive elastomers show great promise in multifunctional wearable electronics,but they currently suffer from liquid leakage/evaporation or mechanical *** ionic conductive elastomers integrating non-volatility,mechanical robustness,superior ionic conductivity,and ultra-stretchability remains urgent and ***,we developed a healable,robust,and conductive elastomer via impregnating free ionic liquids(ILs)into the ILs-multigrafted poly(urethane-urea)(PUU)elastomer networks.A crucial strategy in the molecular design is that imidazolium cations are largely introduced by double-modification of PUU and centipede-like structures are obtained,which can lock the impregnated ILs through strong ionic *** this system,the PUU matrix contributes outstanding mechanical properties,while the hydrogen bonds and ionic interactions endow the elastomer with self-healing ability,conductivity,as well as non-volatility and *** fabricated ionic conductive elastomers show good conductivity(3.8×10^(-6) S·cm^(-1)),high mechanical properties,including tensile stress(4.64 MPa),elongation(1470%),and excellent healing ability(repairing efficiency of 90%after healing at room temperature for 12 h).Significantly,the conductive elastomers have excellent antifatigue properties,and demonstrate a highly reproducible response after 1000 uninterrupted extension-release *** work provides a promising strategy to prepare ionic conductive elastomers with excellent mechanical properties and stable sensing capacity,and further promote the development of mechanically adaptable intelligent sensors.

关键词： ionic conductive elastomers poly(urethane-urea)(PUU) ionic interactions centipede-like self-healing

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MTTSNet:Military time-sensitive targets stealth network via real-time mask generation

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Defence Technology（防务技术） 2024年第3期33卷 601-612页

作者： Siyu Wang Xiaogang Yang Ruitao Lu zhengjie zhu Fangjia Lian Qing-ge Li Jiwei Fan PLA Rocket Force University of Engineering Xi'an 710025China

The automatic stealth task of military time-sensitive targets plays a crucial role in maintaining national military security and mastering battlefield dynamics in military *** propose a novel Military Time-sensitive Targets Stealth Network via Real-time Mask generation(MTTSNet).According to our knowledge,this is the first technology to automatically remove military targets in real-time from *** critical steps of MTTSNet are as follows:First,we designed a real-time mask generation network based on the encoder-decoder framework,combined with the domain expansion structure,to effectively extract mask ***,the ASPP structure in the encoder could achieve advanced semantic feature *** decoder stacked high-dimensional information with low-dimensional information to obtain an effective mask ***,the domain expansion module guided the adaptive expansion of mask ***,a context adversarial generation network based on gated convolution was constructed to achieve background restoration of mask positions in the original *** addition,our method worked in an end-to-end manner.A particular semantic segmentation dataset for military time-sensitive targets has been constructed,called the Military Time-sensitive Target Masking Dataset(MTMD).The MTMD dataset experiment successfully demonstrated that this method could create a mask that completely occludes the target and that the target could be hidden in real time using this *** demonstrated the concealment performance of our proposed method by comparing it to a number of well-known and highly optimized baselines.

关键词： Deep learning Military application Targets stealth network Mask generation generative adversarial network

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Experimental Study on Soot Suppression of Acetylene Diffusion Flame by Acoustic-Excited Oscillation in Rijke-Type Burner

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Journal of Thermal Science 2024年第1期33卷 235-248页

作者： zHU Yibin GUO Hui SUO Yan'ge WU Minle YE Yanghui LI Guoneng zHANG zhiguo School of Mechanical and Energy Engineering Zhejiang University of Science and TechnologyHangzhou 310023China

This work reports that the flame oscillation induced by acoustic excitation can effectively suppress soot generation in Rijke-type *** the acoustic frequency is close to the natural frequency of the burner system,it can produce resonance resulting in intense oscillation of the *** relationship between the soot suppression efficiency and the acoustic field of standing wave at different flame positions is *** with that under self-excited oscillation,when there is external forced acoustic force introduced to the flame,oscillation combustion occurred in a lager zone in the glass *** fundamental cause of different soot suppression efficiency at different positions is that the standing wave acoustic field causes the particles to move at different speeds in different positions of the glass *** axial particle velocity difference results in the formation of acoustic vortexes and the change of the flame *** high particle velocity causes the air in the glass tube to turn into the turbulent condition and make the flame temperature *** results show that the surface growth rate of soot is reduced,while the oxidation rate of soot is enhanced,which result in the soot suppression under acoustic *** study can provide some reference for the practical application of oscillate combustion in soot suppression.

关键词： soot suppression acetylene diffusion flame acoustic-excited oscillation standing wave

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Overexpression of Kdm6b induces testicular differentiation in a temperature-dependent sex determination system

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zoological Research 2024年第5期45卷 1108-1115页

作者： Qiran chen Wei Sun Lin Jin Yingjie zhou Fang Li chutian ge college of Biological and Environmental Sciences Zhejiang Wanli UniversityNingboZhejiang 315100China Institute of Animal Sex and Development Zhejiang Wanli UniversityNingboZhejiang 315100China

In reptiles,such as the red-eared slider turtle(Trachemys scripta elegans),gonadal sex determination is highly dependent on the environmental temperature during embryonic *** complex process,which leads to differentiation into either testes or ovaries,is governed by the finely tuned expression of upstream genes,notably the testis-promoting gene Dmrt1 and the ovary-promoting gene *** studies have identified epigenetic regulation as a crucial factor in testis development,with the H3K27me3 demethylase KDM6B being essential for Dmrt1 expression in ***,whether KDM6B alone can induce testicular differentiation remains *** this study,we found that overexpression of Kdm6b in *** embryos induced the male development pathway,accompanied by a rapid increase in the gonadal expression of Dmrt1 at 31°c,a temperature typically resulting in female ***,this sex reversal could be entirely rescued by Dmrt1 *** findings demonstrate that Kdm6b is sufficient for commitment to the male pathway,underscoring its role as a critical epigenetic regulator in the sex determination of the red-eared slider turtle.

关键词： Temperature-dependent sex determination Sex reversal Kdm6b Dmrt1 T.s.elegans

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Fuzzy Droop control for SOc Balance and Stability Analysis of Dc Microgrid with Distributed Energy Storage Systems

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Journal of Modern Power Systems and clean Energy 2024年第4期12卷 1203-1216页

作者： Jipeng Gu Xiaodong Yang Youbing zhang Luyao Xie Licheng Wang Wenwei zhou Xiaohui ge college of Information Engineering Zhejiang University of TechnologyHangzhou 310023China college of Electrical Engineering Hefei University of TechnologyHefei 230006China Electric Power Research Institute of State Grid zhejiang Electric Power co. Ltd.Hangzhou 310023China

The unbalanced state of charge(SOc)of distribut-ed energy storage systems(DESSs)in autonomous Dc mi-crogrid causes energy storage units(ESUs)to terminate opera-tion due to overcharge or overdischarge,which severely affects the power *** this paper,a fuzzy droop control for SOc balance and stability analysis of Dc microgrid with DESSs is proposed to achieve SOc balance in ESUs while maintaining a stable Dc bus ***,the charge and discharge modes of ESUs are determined based on the power supply requirements of the Dc ***-dimensional fuzzy logic is then ap-plied to establish the relationship between SOc and the droop coefficient R,in the aforementioned two *** addition,when integrated with voltage-current double closed-loop con-trol,SOc balance in different ESUs is *** improve the balance speed and precision,an exponential acceleration factor is added to the input variable of the fuzzy ***,based on the average model of converter,the system-level stabil-ity of microgrid is ***/Simulink simulation re-sults verify the effectiveness and rationality of the proposed method.

关键词： Dc microgrid distributed energy storage system fuzzy droop control state of charge(SOc)balance stabilityanalysis

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combined Optimal Dispatch of Thermal Power generators and Energy Storage considering Thermal Power Deep Peak clipping and Wind Energy Emission Grading Punishment

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Energy Engineering 2024年第4期121卷 869-893页

作者： Junhui Li Xuanzhong Luo changxing ge cuiping Li changrong Wang Key Laboratory of Modern Power System Simulation and control&Renewable Energy Technology Northeast Electric Power UniversityMinistry of EducationJilin132012China Songyuan Power Supply company State Grid Jilin Electric Power Co.Ltd.Songyuan138000China changchun Power Supply company State Grid Jilin Electric Power Co.Ltd.Changchun130021China Jilin Electric Power co. Ltd.Jilin Songhuajiang Thermal Power Generation Co.Ltd.Jilin132012China

Peak load and wind energy emission pressure rise more as wind energy penetration keeps growing,which affects the stabilization of the PS(power system).This paper suggests integrated optimal dispatching of thermal power generators and BESS(battery energy storage system)taking wind energy emission grading punishment and deep peak clipping into ***,in order to minimize wind abandonment,a hierarchical wind abandonment penalty strategy based on fuzzy control is designed and introduced,and the optimal grid-connected power of wind energy is determined as a result of minimizing the peak cutting cost of the ***,considering BESS and thermal power,the management approach of BESS-assisted virtual peak clipping of thermal power generators is aimed at reducing the degree of deep peak clipping of thermal power generators and optimizing the output of thermal power generators and the charging and discharging power of ***,Give an example of how this strategy has been effective in reducing abandonment rates by 0.66% and 7.46% individually for different wind penetration programs,and the daily average can reduce the peak clipping power output of thermal power generators by 42.97 and 72.31 MWh and enhances the effect and economy of system peak clipping.

关键词： BESS wind energy deep peak clipping virtual peak clipping wind energy emission grading punishment

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Evaluation of teplizumab's efficacy and safety in treatment of type 1 diabetes mellitus:A systematic review and meta-analysis

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World Journal of Diabetes 2024年第7期15卷 1615-1626页

作者： Xiao-Lan Ma Dan ge Xue-Jian Hu Department of Endocrinology and Metabolism The Second Affiliated Hospital of Lanzhou UniversityLanzhou 730000Gansu ProvinceChina

BAcKGROUND Islets of Langerhans beta cells diminish in autoimmune type 1 diabetes mellitus(T1DM).Teplizumab,a humanized anti-cD3 monoclonal antibody,may help *** long-term implications on clinical T1DM development,safety,and efficacy are *** To assess the effectiveness and safety of teplizumab as a therapeutic intervention for individuals with *** A systematic search was conducted using four electronic databases(PubMed,Embase,Scopus,and cochrane Library)to select publications published in peerreviewed journals written in *** odds ratio(OR)and risk ratio(RR)were calculated,along with their 95%*** assessed heterogeneity using cochrane Q and I2 statistics and the appropriate P *** There were 8 randomized controlled trials(RcTs)in the current meta-analysis with a total of 1908 T1DM patients from diverse age cohorts,with 1361 patients receiving Teplizumab and 547 patients receiving a *** was found to have a substantial link with a decrease in insulin consumption,with an OR of 4.13(95%cI:1.72 to 9.90).Teplizumab is associated with an improved cpeptide response(OR 2.49;95%cI:1.62 to 3.81)and a significant change in Glycated haemoglobin A1c(HbA1c)levels in people with type 1 diabetes[OR 1.75(95%cI:1.03 to 2.98)],and it has a RR of 0.71(95%cI:0.53 to 0.95).cONcLUSION In type 1 diabetics,teplizumab decreased insulin consumption,improved c-peptide response,and significantly changed HbA1c levels with negligible side *** appears to improve glycaemic control and diabetes management with good safety and efficacy.

关键词： Type-1 diabetes mellitus Teplizumab Anti-cD3 monoclonal antibody Insulin Glycated haemoglobin A1c cpeptide

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Software Defect Prediction Method Based on Stable Learning

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computers, Materials & continua 2024年第1期78卷 65-84页

作者： Xin Fan Jingen Mao Liangjue Lian Li Yu Wei zheng Yun ge college of Aerospace Engineering Nanjing University of Aeronautics and AstronauticsNanjing210012China School of Software Nanchang Hangkong UniversityNanchang330029China Software Testing and Evaluation center Nanchang Hangkong UniversityNanchang330029China

The purpose of software defect prediction is to identify defect-prone code modules to assist software quality assurance teams with the appropriate allocation of resources and *** previous software defect prediction studies,transfer learning was effective in solving the problem of inconsistent project data ***,target projects often lack sufficient data,which affects the performance of the transfer learning *** addition,the presence of uncorrelated features between projects can decrease the prediction accuracy of the transfer learning *** address these problems,this article propose a software defect prediction method based on stable learning(SDP-SL)that combines code visualization techniques and residual *** method first transforms code files into code images using code visualization techniques and then constructs a defect prediction model based on these code *** the model training process,target project data are not required as prior *** the principles of stable learning,this paper dynamically adjusted the weights of source project samples to eliminate dependencies between features,thereby capturing the“invariance mechanism”within the *** approach explores the genuine relationship between code defect features and labels,thereby enhancing defect prediction *** evaluate the performance of SDP-SL,this article conducted comparative experiments on 10 open-source projects in the PROMISE *** experimental results demonstrated that in terms of the F-measure,the proposed SDP-SL method outperformed other within-project defect prediction methods by 2.11%-44.03%.In cross-project defect prediction,the SDP-SL method provided an improvement of 5.89%-25.46% in prediction performance compared to other cross-project defect prediction ***,SDP-SL can effectively enhance within-and cross-project defect predictions.

关键词： Software defect prediction code visualization stable learning sample reweight residual network

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