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A three-way electrolyte with ternary solvents for high-energy-density and long-cycling lithium-sulfur pouch cells

SusMat 2024年第2期4卷 1-12页

作者： Zheng Li Legeng Yu Chen-Xi Bi Xi-Yao Li JinMa Xiang Chen Xue-Qiang Zhang Aibing Chen Haoting Chen Zuoru Zhang Li-Zhen Fan bo-Quan Li cheng Tang Qiang Zhang Tsinghua Center for Green Chemical Engineering Electrification Beijing Key Laboratory of Green Chemical Reaction Engineering and TechnologyDepartment of Chemical EngineeringTsinghua UniversityBeijingChina School of Materials Science and Engineering Beijing Institute of TechnologyBeijingChina Institute of Advanced Materials and Technology University of Science and TechnologyBeijingChina Shanxi Research Institute for Clean Energy Tsinghua UniversityTaiyuanChina Center for Next-Generation Energy Materials and School of Chemical Engineering Sungkyunkwan UniversityJangan-GuSuwon-SiGyeonggi-DoRepublic of Korea College of Chemical and Pharmaceutical Engineering Hebei University of Science and TechnologyShijiazhuangChina Ordos Carbon Neutral Research and Application Co. Ltd.Kangbashi DistrictOrdos CityInner MongoliaChina Institute for Carbon Neutrality Tsinghua UniversityBeijingChina

Lithium–sulfur(Li–S)batteries promise high-energy-density potential to exceed the commercialized lithiumion batteries but suffer from limited cycling lifespan due to the side reactions between lithium polysulfides(LiPSs)and Li metal ***,a three-way electrolyte with ternary solvents is proposed to enable high-energy-density and long-cycling Li–S pouch ***,ternary solvents composed of 1,2-dimethoxyethane,di-isopropyl sulfide,and 1,3,5-trioxane are employed to guarantee smooth cathode kinetics,inhibit the parasitic reactions,and construct a robust solid electrolyte interphase,*** cycling lifespan of Li–S coin cells with 50μm Li anodes and 4.0 mg cm^(−2) sulfur cathodes is prolonged from88 to 222 cycles using the three-way ***-heterogeneous solvation structure of LiPSs and organic-rich solid electrolyte interphase are identified to improve the cycling stability of Li metal ***,a 3.0 Ah-level Li–S pouch cell with the three-way electrolyte realizes a high energy density of 405 Wh kg^(−1) and undergoes 27 *** affords a three-way electrolyte recipe for suppressing the side reactions of LiPSs and inspires rational electrolyte design for practical high-energy-density and long-cycling Li–S batteries.

关键词： lithium metal anodes lithium-sulfur batteries pouch cells solid electrolyte interphase three-way electrolyte

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基于相空间重构的中性点非有效接地系统铁磁谐振故障辨识研究

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电力系统保护与控制 2024年第15期52卷 131-141页

作者：郭成陈波陈慧杨灵睿昆明理工大学电力工程学院云南昆明650500 中国南方电网公司超高压输电公司曲靖局云南曲靖655000

准确辨识铁磁谐振故障是启动微机消谐装置的前提,而现有时频分析方法提取铁磁谐振过电压信号特征时存在容易误判和相邻频率模态相互混叠的缺点。针对上述问题,从铁磁谐振过电压时间序列的混沌特征出发,提出了基于相空间重构的中性点非... 详细信息

准确辨识铁磁谐振故障是启动微机消谐装置的前提,而现有时频分析方法提取铁磁谐振过电压信号特征时存在容易误判和相邻频率模态相互混叠的缺点。针对上述问题,从铁磁谐振过电压时间序列的混沌特征出发,提出了基于相空间重构的中性点非有效接地系统铁磁谐振故障辨识方法。首先利用C-C法计算相空间重构的特征参数(嵌入维数、延迟时间),然后通过相空间重构技术将过电压时间序列引入到高维空间,分析重构吸引子相平面轨迹的属性特征(关联维数、点分布因数)和几何特征(矢径偏移、中心距),并揭示了不同铁磁谐振类型重构相平面轨迹特征。最后,引入K值作为4种特征量变化规律的特征参数,结合特征量变化规律给出不同类型铁磁谐振的参考K值,以此作为谐振判据进而辨识谐振类型。通过仿真分析和云南某10 kV配电系统发生的铁磁谐振实例验证了所提方法的可行性。

关键词：铁磁谐振相空间重构相平面属性特征几何特征

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Vibration reduction effect of the shielding pile based on seismic wave attenuation in shallow underground spaces

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Journal of Earth Science 2024年

作者： Qiankuan Wang Shili Qiu Aiguo Xing Xueyong Xu Ye Zhou Yao cheng Haoshan Zhang bo Wu Yiwei Liu Mingzhe Zhang Yu Zhuang State Key Laboratory of Ocean Engineering， Shanghai Jiao Tong University State Key Laboratory of Geomechanics and Geotechnical Engineering， Institute of Rock and Soil Mechanics， Chinese Academy of Sciences North Information Control Research Academy Group CO.， LTD Faculty of Engineering， China University of Geosciences

Seismic hazards threaten underground structures and subsequently affect surface buildings， making effective vibration reduction measures crucial in shallow underground spaces. This paper proposes a multi-layer shielding pile based on the seismic wave attenuation theory of refraction dispersion and diffraction loss as a new vibration reduction method. By using the dynamic wave interaction between the unique multi-layer structure of the shielding pile and the seismic wave， a shielding area with significant attenuation of the ground motion is formed to achieve the purpose of vibration reduction. The spectral element method (SEM) with high-order source time function and convolution perfect matching layer (PML) is used to simulate the numerical models of shielding piles with different parameters (including background models and excavation models)， and the characteristics of ground motion and site effect near shielding piles in various models are analyzed. The study reveals the control effect and regulation of the material， size， and shape of the shielding pile on its vibration reduction effect， and determines the shielding pile parameters with the best vibration reduction effect. Shielding piles enriches the vibration reduction measures for structures in shallow underground spaces， and provides a new method for preventing seismic hazards under dynamic load.

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Determination of the Pile Drivability Using Random Forest Optimized by Particle Swarm Optimization and Bayesian Optimizer

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Computer Modeling in Engineering & Sciences 2024年第10期141卷 871-892页

作者： Shengdong cheng Juncheng Gao Hongning Qi State Key Laboratory of Eco-Hydraulics in Northwest Arid Region Xi’an University of TechnologyXi’an710048China School of Resources and Safety Engineering Central South UniversityChangsha410083China

Driven piles are used in many geological environments as a practical and convenient structural ***,the determination of the drivability of piles is actually of great importance in complex geotechnical *** methods of predicting pile drivability often rely on simplified physicalmodels or empirical formulas,whichmay lack accuracy or applicability in complex geological ***,this study presents a practical machine learning approach,namely a Random Forest(RF)optimized by Bayesian Optimization(bo)and Particle Swarm Optimization(PSO),which not only enhances prediction accuracy but also better adapts to varying geological environments to predict the drivability parameters of piles(i.e.,maximumcompressive stress,maximum tensile stress,and blow per foot).In addition,support vector regression,extreme gradient boosting,k nearest neighbor,and decision tree are also used and applied for comparison *** order to train and test these models,among the 4072 datasets collected with 17model inputs,3258 datasets were randomly selected for training,and the remaining 814 datasets were used for model ***,the results of these models were compared and evaluated using two performance indices,i.e.,the root mean square error(RMSE)and the coefficient of determination(R2).The results indicate that the optimized RF model achieved lower RMSE than other prediction models in predicting the three parameters,specifically 0.044,0.438,and 0.146;and higher R^(2) values than other implemented techniques,specifically 0.966,0.884,and *** addition,the sensitivity and uncertainty of the optimized RF model were analyzed using Sobol sensitivity analysis and Monte Carlo(MC)*** can be concluded that the optimized RF model could be used to predict the performance of the pile,and it may provide a useful reference for solving some problems under similar engineering conditions.

关键词： Random forest regression model pile drivability Bayesian optimization particle swarm optimization

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Exploring the molecular mechanism of Baoyuan decoction in the treatment of lung cancer based on network pharmacology and molecular docking

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Integrative Medicine Discovery 2024年第19期8卷 1-11页

作者： Dan Wang Zhen-Hua Ge bo-Ya Guan Ri-cheng Jiang Hao Jin Center for Precision Cancer Medicine&Translational Research Tianjin Cancer Hospital Airport HospitalTianjin 300308China Department of Pharmacy Tianjin HospitalTianjin 300211China Department of Thoracic Oncology Tianjin Lung Cancer CenterTianjin Cancer Institute&HospitalTianjin Medical UniversityTianjin 300060China.

Background:Baoyuan decoction is used clinically as an adjuvant treatment for lung ***,the underlying mechanism remains ***,this study aimed to explore the mechanism of action of Baoyuan decoction in lung cancer treatment using network pharmacology and molecular docking ***:The Traditional Chinese Medicines Systems Pharmacology Database and Analysis Platform and SwissTargetPrediction databases were used to screen the active ingredients of Baoyuan decoction and their relevant *** cancer-related targets were obtained from the GeneCards,Online Mendelian Inheritance in Man,and DrugBank ***-protein interaction network of the common targets was constructed using the STRING database and analyzed using Cytoscape software ***,Gene Ontology enrichment,Kyoto Encyclopedia of Genes and Genomes pathway analyses and visualization of common genes were performed using the R ***,molecular docking of the selected key ingredients and targets was performed,and the results were verified using AutoDock Vina ***:We identified 142 potential active ingredients,3624 potential lung cancer-related targets,and 341 common drug targets.A total of 72 core targets were identified,of which AKT1,TP53,interleukin-6,epithelial growth factor receptor,and signal transducer and activator of transcription 3 were key.A total of 4116 items were obtained via Gene Ontology enrichment *** Encyclopedia of Genes and Genomes pathway enrichment analyses revealed 189 related signaling pathways,including the PI3K-Akt,AGE-RAGE signaling pathways in diabetic complications,FOXO,and TH signaling pathways,which are involved in cell proliferation,autophagy,metastasis,invasion,radiation resistance,and chemotherapy resistance in the lung cancer *** molecular docking results suggested that the key ingredients had a strong affinity for key ***:This study demonstrates that Baoyuan deco

关键词： Baoyuan decoction lung cancer network pharmacology molecular docking mechanism research

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手术治疗胰腺腺泡细胞癌伴发脂膜炎1例

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世界华人消化杂志 2017年第21期25卷 1985-1988页

作者：王睿鹏李忠廉尚海涛张西波鲍建亨王海博郝成飞刘军舰天津中医药大学天津市300193 天津市南开医院肝胆胰外科二天津市300100

天津市南开医院肝胆胰外科二收治1例首先表现为双下肢散在结节性脂膜炎,后经影像学检查后考虑胰腺巨大占位性病变,并与双下肢脂膜炎密切相关的罕见病例.手术治疗后,标本病理提示:腺泡细胞癌,患者原发疾病治愈,双下肢散在脂膜炎好转.本... 详细信息

天津市南开医院肝胆胰外科二收治1例首先表现为双下肢散在结节性脂膜炎,后经影像学检查后考虑胰腺巨大占位性病变,并与双下肢脂膜炎密切相关的罕见病例.手术治疗后,标本病理提示:腺泡细胞癌,患者原发疾病治愈,双下肢散在脂膜炎好转.本病实属罕见,特报道此病例.

关键词：胰腺癌腺泡细胞癌脂膜炎

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经济责任审计、代理成本与国有企业现金持有

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上海财经大学学报 2024年第5期26卷 107-121页

作者：程博蔡云霏南京审计大学会计学院

经济责任审计紧扣国有资产的管理、分配和使用,强化对权力运行的制约和监督,对督促国有企业领导人员规范权力行使、发挥国家审计治理功能具有重大意义。文章以2019年《经济责任审计新规》的实施为准自然实验,利用2016—2021年中国沪深A... 详细信息

经济责任审计紧扣国有资产的管理、分配和使用,强化对权力运行的制约和监督,对督促国有企业领导人员规范权力行使、发挥国家审计治理功能具有重大意义。文章以2019年《经济责任审计新规》的实施为准自然实验,利用2016—2021年中国沪深A股上市公司的数据,考察了经济责任审计对国有企业现金持有的影响、作用机制及其经济后果。实证结果表明,《经济责任审计新规》实施之后的国有企业现金持有水平平均降低了16.07%。进一步检验发现,经济责任审计通过降低代理成本进而减少现金持有,并最终提升公司价值。横截面检验发现,当企业机构投资者持股比例高、外部审计质量高、管理层晋升动机强时,经济责任审计与国有企业现金持有水平的负相关关系更为明显。文章提供了经济责任审计与国有企业现金持有水平之间因果关系的经验证据,对探究国有企业治理问题,实现国有资产保值增值、提质增效具有一定的启示意义。

关键词：经济责任审计现金持有代理成本公司价值

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融资融券扩容的风险溢出效应与治理研究

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金融监管研究 2024年第4期 37-53页

作者：宣扬程博上海对外经贸大学会计学院南京审计大学会计学院

本文以我国融资融券的制度改革为背景,考察了渐进式扩容的金融风险溢出效应及治理机制。研究发现,随着行业中融资融券标的股票比例上升,同行业股票价格崩盘风险显著增加,表明融资融券不仅直接影响标的股票的价格波动,还可能将风险溢出... 详细信息

本文以我国融资融券的制度改革为背景,考察了渐进式扩容的金融风险溢出效应及治理机制。研究发现,随着行业中融资融券标的股票比例上升,同行业股票价格崩盘风险显著增加,表明融资融券不仅直接影响标的股票的价格波动,还可能将风险溢出到同行业其他股票中。机制分析发现,风险溢出效应主要由融资交易造成。进一步的分析表明,较高的会计信息质量,或较好的信息环境,或投资者较强的信息搜集与处理能力,均有助于缓解风险溢出效应。本文的研究结论为今后制定与实施金融监管政策、防范系统性金融风险提供了一定的启示。

关键词：金融风险融资融券风险溢出风险治理

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A Nonlinear Grey Bernoulli Model with Conformable Fractional-Order Accumulation and Its Application to the Gross Regional Product in the cheng-Yu Area

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Journal of Systems Science and Information 2024年第2期12卷 245-273页

作者： Wenqing WU Xin MA bo ZENG Yuanyuan ZHANG School of Science Civil Aviation Flight University of ChinaDeyang 618307China School of Mathematics and Physics Southwest University of Science and TechnologyMianyang 621010China College of Business Planning Chongqing Technology and Business UniversityChongqing 400067China

This study considers a nonlinear grey Bernoulli forecasting model with conformable fractionalorder accumulation,abbreviated as CFNGBM(1,1,λ),to study the gross regional product in the chengYu *** new model contains three nonlinear parameters,the power exponentγ,the conformable fractional-orderαand the background valueλ,which increase the adjustability and flexibility of the CFNGBM(1,1,λ)*** parameters are determined by the moth flame optimization algorithm,which minimizes the mean absolute prediction percentage *** CFNGBM(1,1,λ)model is applied to the gross regional product of 16 cities in the cheng-Yu area,which are Chongqing,chengdu,Mianyang,Leshan,Zigong,Deyang,Meishan,Luzhou,Suining,Neijiang,Nanchong,Guang’an,Yibin,Ya’an,Dazhou and *** data from 2013 to 2021,several grey models are established and results show that the new model has higher accuracy in most cases.

关键词： nonlinear grey Bernoulli model conformable fractional-order operator moth flame optimization algorithm gross regional product the cheng-Yu area

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Development of a new Cox model for predicting long-term survival in hepatitis cirrhosis patients underwent transjugular intrahepatic portosystemic shunts

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World Journal of Gastrointestinal Surgery 2024年第2期16卷 491-502页

作者： Yi-Fan Lv Bing Zhu Ming-Ming Meng Yi-Fan Wu cheng-Bin Dong Yu Zhang bo-Wen Liu Shao-Li You Sa Lv Yong-Ping Yang Fu-Quan Liu Liver Disease Minimally Invasive Diagnosis and Treatment Center Beijing Shijitan HospitalCapital Medical UniversityBeijing 100038China Liver Vascular Disease Diagnosis and Treatment Center The Fifth Medical Center of Chinese People's Liberation Army General HospitalBeijing 100039China

BACKGROUND Transjugular intrahepatic portosystemic shunt(TIPS)placement is a procedure that can effectively treat complications of portal hypertension,such as variceal bleeding and refractory ***,there have been no specific studies on predicting long-term survival after TIPS *** To establish a model to predict long-term survival in patients with hepatitis cirrhosis after *** A retrospective analysis was conducted on a cohort of 224 patients who un-derwent TIPS *** univariate and multivariate Cox regression analyses,various factors were examined for their ability to predict survival at 6 years after ***,a composite score was formulated,encompassing the indication,shunt reasonability,portal venous pressure gradient(PPG)after TIPS,percentage decrease in portal venous pressure(PVP),indocyanine green retention rate at 15 min(ICGR15)and total bilirubin(Tbil)***,the performance of the newly developed Cox(NDC)model was evaluated in an in-ternal validation cohort and compared with that of a series of existing *** The indication(variceal bleeding or ascites),shunt reasonability(reasonable or unreasonable),ICGR15,post-operative PPG,percentage of PVP decrease and Tbil were found to be independent factors affecting long-term survival after TIPS *** NDC model incorporated these parameters and successfully identified patients at high risk,exhibiting a notably elevated mortality rate following the TIPS procedure,as observed in both the training and validation ***,in terms of predicting the long-term survival rate,the performance of the NDC model was significantly better than that of the other four models[Child-Pugh,model for end-stage liver disease(MELD),MELD-sodium and the Freiburg index of post-TIPS survival].CONCLUSION The NDC model can accurately predict long-term survival after the TIPS procedure in patients with hepatitis cirrhosis,help identify high-risk patients

关键词： Transjugular intrahepatic portosystemic shunt Long-term survival Predictive model

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