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Multi-effect anthraquinone-based polyimide enclosed SnO_(2)/reduced graphene oxide composite as high-performance anode for lithium-ion battery

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Frontiers of Chemical Science and Engineering 2023年第9期17卷 1231-1243页

作者： Lin Wang Yinjie Kuang Qian Cui junyu shi Liubin Song Qionghua Li Tianjian Peng Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation School of Chemistry and Chemical EngineeringChangsha University of Science and TechnologyChangsha410114China Guizhou Dalong Huicheng New Material Co. Ltd.Tongren554000China

The cycling stability of SnO_(2)anode as lithium-ion battery is poor due to volume *** coatings can effectively confine the expansion of SnO_(2).However,linear polyimides are easily dissolved in ester electrolytes and their carbonyls is not fully utilized during charging/discharging ***,the SnO_(2)enclosed with anthraquinone-based polyimide/reduced graphene oxide composite was prepared by *** from the anthraquinone unit provide fully available active sites to react with Li^(+),improving the utilization of carbonyl in the *** exposed carbonyl active sites promote the conversion of Sn to SnO_(2)with electrode gradual activation,leading to an increase in reversible capacity during the charge/discharge *** addition,the introduction of reduced graphene oxide cannot only improve the stability of polyimide in the electrolyte,but also build fast ion and electron transport channels for composite *** to the multiple effects of anthraquinone-based polyimide and the synergistic effect of reducing graphene oxide,the composite anode exhibits a maximum reversible capacity of 1266 mAh·g^(−1) at 0.25 A·g^(−1),and maintains an excellent specific capacity of 983 mAh·g^(−1) after 200 *** work provides a new strategy for the synergistic modification of SnO_(2).

关键词： anthraquinone-based polyimide multi-effect tin dioxide reduced graphene oxide lithium-ion battery

Design and Realization of Schottky Barrier Didoes in 130nm CMOS Process

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Journal of Beijing Institute of Technology 2017年第2期26卷 223-227页

作者： junyu shi Dasheng Cui Haidong Hao Haixia Wu Xin Lyu School of Information and Electronics Beijing Institute of Technology Beijing 100081 China

A polysilicon separated CMOS Schottky barrier diode is designed and tested in this *** replacing the shallow trench isolation（STI）of a ploy ring,the series resistances of Schottky diodes are reduced,leading to an improvement in cut-off *** device structure is detailed and a device model is *** analysis on the device shows that the cut-off frequency increases with the decreasing of the Schottky contact *** on this observation,the Schottky contact area is set to0.38×0.38μm^2,which is the minimum contact diffusion area allowed by the process *** distance between the anode and the cathode is also *** with different dimensions are fabricated and *** extensive measurements,the optimum dimensions are *** with a reduced area are used to improve the measurement *** measurement results show that these diodes can achieve a cut-off frequency of 1.5 ***,it is possible to use these diodes in THz detection.

关键词： Schottky barrier diodes cut-off frequency silicon THz detection

HMGB1 from Astrocytes Promotes EAE by Influencing the Immune Cell Infiltration-Associated Functions of BMECs in Mice

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Neuroscience Bulletin 2022年第11期38卷 1303-1314页

作者： junyu shi Yifan Xiao Na Zhang Mengya Jiao Xuhuan Tang Chan Dai Chenchen Wang Yong Xu Zheng Tan Feili Gong Fang Zheng Department of Immunology School of Basic MedicineTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Key Laboratory of Organ Transplantation Ministry of EducationNHC Key Laboratory of Organ TransplantationKey Laboratory of Organ TransplantationChinese Academy of Medical SciencesWuhan 430030China Department of Pathology and Pathophysiology School of MedicineJianghan UniversityWuhan 430056China

High mobility group box 1(HMGB1)has been reported to play an important role in experimental autoimmune encephalomyelitis(EAE).Astrocytes are important components of neurovascular units and tightly appose the endothelial cells of microvessels by their perivascular endfeet and directly regulate the functions of the blood-brain *** express more HMGB1 during EAE while the exact roles of astrocytic HMGB1 in EAE have not been well ***,using conditional-knockout mice,we found that astrocytic HMGB1 depletion decreased morbidity,delayed the onset time,and reduced the disease score and demyelination of ***,there were fewer immune cells,especially pathogenic T cells infiltration in the central nervous system of astrocytic HMGB1 conditional-knockout EAE mice,accompanied by up-regulated expression of the tight-junction protein Claudin5 and down-regulated expression of the cell adhesion molecules ICAM1 and VCAM1 in *** vitro,HMGB1 released from astrocytes decreased Claudin5 while increased ICAM1 and VCAM1 expressed by brain microvascular endothelial cells(BMECs)through TLR4 or *** together,our results demonstrate that HMGB1 derived from astrocytes aggravates EAE by directly influencing the immune cell infiltration-associated functions of BMECs.

关键词： HMGB1 Astrocytes Experimental autoimmune encephalomyelitis Blood-brain barrier

Energy-efficient Medium-speed Maglev Train Control Based on Resistance Fitting

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Energy-efficient Medium-speed Maglev Train Control Based on ...

Evaluation of Overall Coordination of Urban and Rural Land Use in Xiangtan City

第40届中国控制会议

作者： junyu shi Wenjin Yue Yiwei Wang Weifeng Zhong Beijing Jiaotong University

Compared with traditional rail transit systems with the same transport capacity, the maglev transport has great advantages in terms of safety, energy conservation and environmental protection. Since the maglev train is driven by the electromagnetic force and does not touch the rail when it is running, the form of basic resistance acting on the maglev train is more complex than that of the traditional train. This imposes extra challenges to obtain the energy-efficient control strategies for maglev trains. In this paper, we consider the energy-efficient control problem for medium-speed maglev trains whose basic resistance is a piecewise-quadratic function of train speed. Firstly, the piecewise-quadratic function is approximated as a single quadratic function by using the least square fitting method. Then, by applying control parameterization and time-scaling transformation technique, the traction and braking forces of the maglev train are approximated as piecewise-constant values at each track segment, and the energy-efficient maglev train control problem is transformed into a finite-dimensional optimization problem which is then solved by using the gradient-based sequential quadratic programming（SQP） algorithm. Finally, the effectiveness and performance of the proposed method are demonstrated by two numerical examples. The simulation results show that the proposed algorithm can fit the original resistance function well, and the obtained control strategy based on the fitted resistance results in lower energy consumption with higher computation efficiency.

关键词： Medium-speed Maglev Train Energy-efficient Train Control Resistance Fitting Control Parameterization Time-scaling Transformation

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Asian Agricultural Research 2013年第7期5卷 67-69,91页

作者： Jinning XIE junyu shi Jun HU Yuelong YANG School of Architecture and Urban Planning Hunan University of Science and Technology

Based on regional characteristics of Xiangtan City and in line with relevant principle of overall coordination of urban and rural land use,this paper builds an evaluation system for overall urban and rural land use in Xiangtan City. With weight of each index determined by Analytic Hierarchy Process,it makes quantitative analysis of overall urban and rural land use of Xiangtan City in recent 8 years. Finally,it proposes feasible recommendations for overall coordinated development of urban and rural land use in Xiangtan City according to current land use situations.

关键词： Xiangtan City Urban and rural land Overall and coo

Integrated Optimization of Energy Storage Allocation and Train Speed Control in Urban Rail Transit Systems

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Integrated Optimization of Energy Storage Allocation and Tra...

不同资本投资取向对服务业发展规模的影响研究

第43届中国控制会议

作者： junyu shi Zhaosen Chen Jiateng Yin Andrea D'Ariano Jun Xu State Key Laboratory of Advanced Rail Autonomous Operation Beijing Jiaotong University Department of Engineering Roma Tre University Nanchang Rail Transit Group Co. Ltd.

With the promotion of "double carbon" plan in China,the energy-saving problem of urban rail transit,as a major energy user of the government,has garnered significant *** urban rail train operations,the energy storage devices(ESDs)can temporarily store the regenerative energy from braking trains and feed it back to other accelerating ***,the ESDs comes with a high price tag and limited *** minimize the overall energy consumption of urban rail lines with limited ESDs,this paper addresses the collaborative optimization of ESD allocation and train speed profiles,in order to coordinate the usage of energy among ESDs and accelerating/braking trains,such that the overall energy consumption,i.e.,the consumed energy for train acceleration subtracting the used regenerated energy,can be ***,we construct a mixed-integer programming(MIP) model to collaboratively optimize the train running speed curve(with accelerating,coasting and braking) and ESD locations.A series of constraints are developed to limit the flow of energy among ESDs and the state transition of running ***,we verify the feasibility and effectiveness of our integrated approach using real-world data from Beijing Metro Yizhuang Line.

关键词： Subway system ESD energy-efficient train control regenerative energy

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统计与决策 2018年第4期34卷 177-181页

作者：施俊宇冯白南京大学会计与财务研究院南京210093 南京大学商学院南京210093

文章将人力资本切分为一般性人力资本投资和高端人力资本投资,并分别纳入企业生产性资本投资和技术性资本投资中,运用非平衡面板数据和GMM模型系统分析了不同取向的资本投资对于我国服务业发展的影响效应,并在此基础上结合产权性质进行... 详细信息

文章将人力资本切分为一般性人力资本投资和高端人力资本投资,并分别纳入企业生产性资本投资和技术性资本投资中,运用非平衡面板数据和GMM模型系统分析了不同取向的资本投资对于我国服务业发展的影响效应,并在此基础上结合产权性质进行了进一步的探讨。结果显示：三种资本投资取向对于我国服务业规模的提升均存在显著促进作用,但服务业生产效率的提升则更为依赖技术性资本投资和投机性资本投资。结合区域差异及产权性质,东部地区服务业发展最为依赖技术性资本投资;西部地区则依赖于地方政府干预和影响。地方国有企业资本投资在中部地区存在负向作用,民营企业及中央国有企业则存在正向作用。

关键词：不同资本投资取向服务业发展程度非平衡面板数据滞后变量

高维情况下双差整周模糊度LAMBDA法解算分析

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哈尔滨工程大学学报 2012年第4期33卷 470-475页

作者：程建华王晶晏亮时俊宇哈尔滨工程大学自动化学院黑龙江哈尔滨150001 北京航天时代激光导航技术有限责任公司设计部北京100143

为了研究在多基线和多定位系统网络式等高维应用情况下整周模糊度解算LAMBDA(least-squares ambiguity decorrelation adjustment)方法的失效问题,针对算法的去相关处理过程深入分析,在阐述去相关具体实现流程的基础上,将解算步骤细化.... 详细信息

为了研究在多基线和多定位系统网络式等高维应用情况下整周模糊度解算LAMBDA(least-squares ambiguity decorrelation adjustment)方法的失效问题,针对算法的去相关处理过程深入分析,在阐述去相关具体实现流程的基础上,将解算步骤细化.运用矩阵分析的方法,研究了去相关过程中矩阵分解和排序问题,指出了高维情况下模糊度的条件方差在去相关处理后降序排列不完全的问题.从理论角度解释条件方差降序排列是模糊度正确解算的前提,进而得出结论:高维情况下整周模糊度解算失效的原因是条件方差降序处理不完善.

关键词： LAMBDA算法去相关高维解算条件方差降序排列

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多阻尼系数的全阻尼惯导系统的设计与实现

哈尔滨工程大学学报 2011年第6期32卷 786-791页

作者：程建华时俊宇荣文婷晏亮哈尔滨工程大学自动化学院黑龙江哈尔滨150001 北京航天时代激光导航技术有限责任公司北京100143

针对纬度和方位的地球周期振荡误差降低惯导系统导航定位精度的问题,以实际研制的惯性导航系统为对象,引入三阶方位阻尼网络,采用逐次尝试的方法,设计了多阻尼系数的方位阻尼网络,实现了地球周期振荡误差的阻尼,且能适应于载体的多种机... 详细信息

针对纬度和方位的地球周期振荡误差降低惯导系统导航定位精度的问题,以实际研制的惯性导航系统为对象,引入三阶方位阻尼网络,采用逐次尝试的方法,设计了多阻尼系数的方位阻尼网络,实现了地球周期振荡误差的阻尼,且能适应于载体的多种机动运动状态;在此基础上采用自动补偿技术减小状态切换过程中的超调误差.通过速度误差计算机比对仿真结果可以看出,全阻尼惯导系统方案能实现地球周期的阻尼,自动补偿技术能实现状态切换的平滑切换.

关键词：平台式惯导系统方位阻尼多阻尼系数超调补偿