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Chinese Journal of Polymer Science 2022年第11期40卷 1380-1388页

作者： meng-Hang Gao Wen Feng Xiao-dong Qi Yong Wang Key Laboratory of Advanced Technologies of Materials(Ministry of Education) School of Materials Science&EngineeringSouthwest Jiaotong UniversityChengdu610031China

Developing thermal management fabrics with good energy storage and multistimuli responsive properties is important for regulating the body temperature in complex ***,the intelligent nonwoven membranes were fabricated via a coaxial electrospinning method,resulting in a core-sheath structure with poly(ethylene glycol)(PEG)as core and polyurethane(PU)as ***,polypyrrole(PPy)with good light absorption ability and electrical conductivity was deposited onto the surface of the PU@PEG electrospun fibers via electrochemical *** PPy layer enabled the membranes to respond quickly to sunlight and electrical *** membranes could heat up to 86°C under simulated sunlight within 200 s or produce remarkable electrothermal effect under a low voltage input of only 1V,exhibiting efficient energy conversion and storage *** photothermal and electrothermal conversion effect could be easily adjusted by controlling the polymerization time of ***,the multifunctional membranes with high latent heat,good mechanical properties as well as excellent photothermal/electrothermal conversion ability are promising in personal thermal management applications.

关键词： Phase change materials Polypyrrole Coaxial electrospinning Photothermal conversion Electrothermal conversion

Acceptor-acceptor-type Organoboron Conjugated Polymers:Effect of Backbone Configuration on Thermoelectric Performance

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Chinese Journal of Polymer Science 2023年第1期41卷 108-116页

作者： Chang-Shuai dong Bin meng Jun Liu Li-Xiang Wang State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China University of Science and Technology of China Hefei230026China

The development of n-type polymer thermoelectrics lags far behind that of p-type ones in view of material diversity and *** structural insights into the thermoelectric performance are needed for efficient n-type polymer thermoelectric ***,we developed three acceptor-acceptor type organoboron polymers and investigated the effect of backbone configuration on thermoelectric *** three polymers are designed based on double B←N bridged bipyridine(BNBP)unit with monomeric thieno[3,4-c]pyrrole-4,6-dione(TPD),TPD dimer and TPD trimer as the copolymerizing units,*** three polymers show similar low LUMO energy levels but different backbone *** with the wavy backbone configuration,the pseudo-straight backbone configuration imparts the polymer with much enhanced crystallinity and electron *** a result,after n-doping,the polymer with pseudo-straight configuration shows much higher electronic conductivity and power *** think these findings could serve as important guidelines for molecular design toward efficient n-type polymer thermoelectric materials.

关键词： Organoboron polymers Acceptor-acceptor type conjugated polymers n-Type polymer thermoelectrics n-Doping

Prior austenite grain boundary recognition in martensite microstructure based on deep learning

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Journal of Iron and Steel Research International 2023年第5期30卷 1050-1056页

作者： Xuan-dong Wang Nan Li Hang Su Hui-min meng Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China Department of Structural Steel Central Iron and Steel Research Institute Co.Ltd.Beijing 100081China Material Digital R&D Center China Iron&Steel Research Institute Group Co.Ltd.Beijing 100081China Central Laboratory Central Iron and Steel Research Institute Co.Ltd.Beijing 100081China

Grain size determination is essential in producing and testing iron and steel *** size determination of martensitic steels usually requires etching with picric acid to reveal the prior austenite grain ***,picric acid is toxic and explosive and belongs to hazardous chemicals,which makes it difficult for laboratories and testing institutions to obtain.A new experimental method was developed to use Nital etchant instead of picric *** deep learning method was used to recognize the prior austenite grain boundaries in the etched martensite microstructure,and the grain size could be determined according to the recognition ***,the polished martensite specimen was etched twice with Nital etchant and picric acid,respectively,and the same position was observed using an optical *** images of the martensitic structure and its prior austenite grain boundary label were obtained,and a data set was ***,based on this data set,a convolutional neural network model with a semantic segmentation function was trained,and the accuracy rate of the test set was 87.53%.Finally,according to the recognition results of the model,the grain size rating can be automatically determined or provide a reference for experimenters,and the difference between the automatic determination results and the measured results is about 0.5 level.

关键词： Prior austenite grain boundary Microstructure etching Image recognition Deep learning

Fast-armored target detection based on multi-scale representation and guided anchor

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Defence Technology（防务技术） 2020年第4期16卷 922-932页

作者： Fan-jie meng Xin-qing Wang Fa-ming shao dong Wang Xiao-dong Hu Department of Mechanical Engineering College of Field EngineeringArmy Engineering University of PLANanjing210007China

Focused on the task of fast and accurate armored target detection in ground battlefield,a detection method based on multi-scale representation network(MS-RN) and shape-fixed Guided Anchor(SF-GA)scheme is ***,considering the large-scale variation and camouflage of armored target,a new MS-RN integrating contextual information in battlefield environment is *** MS-RN extracts deep features from templates with different scales and strengthens the detection ability of small *** targets of different sizes are detected on different representation ***,aiming at the accuracy and real-time detection requirements,improved shape-fixed Guided Anchor is used on feature maps of different scales to recommend regions of interests(ROIs).Different from sliding or random anchor,the SF-GA can filter out 80% of the regions while still improving the recall.A special detection dataset for armored target,named Armored Target Dataset(ARTD),is constructed,based on which the comparable experiments with state-of-art detection methods are *** results show that the proposed method achieves outstanding performance in detection accuracy and efficiency,especially when small armored targets are involved.

关键词： red image RPN Fast-armored target detection based on multi-scale representation and guided anchor

A Modified Impact-increment-based State Enumeration Method and Its Application in Power Distribution Systems

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Journal of Modern Power Systems and Clean Energy 2023年第6期11卷 1912-1922页

作者： Lukun Ge Kai Hou Hongmin meng Hongjie Jia Ziheng dong Key Laboratory of Smart Grid of Ministry of Education Tianjin UniversityTianjin 300072China State Grid Information&Telecommunication Group Co. Ltd.Beijing 102211China

Reliable planning and operation of power distribution systems are of great significance. In this paper, the impactincrement based state enumeration(IIBSE) method is modified to adapt to the features of distribution systems. With the proposed method, the expectation, probabilistic, and duration reliability indices can be accurately obtained with a lower enumerated order of contingency states. In addition, the time-consuming optimal power flow(OPF) calculation can be replaced by a simple matrix operation for both independent and radial series failure states. Therefore, the accuracy and efficiency of the assessment process are improved comprehensively. The case of RBTS bus 6 system and IEEE 123 node test feeder system are utilized to test the performance of the modified IIBSE. The results show the superiority of the proposed method over Monte Carlo(MC) sampling and state enumeration(SE) methods in distribution systems.

关键词： Power distribution system reliability assessment impact-increment state enumeration

Numerical study on the effective thermal conductivity and thermal tortuosity of porous media with different morphologies

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Science China(Technological Sciences) 2024年第6期67卷 1685-1694页

作者： DU Shen LI dong LI meng-Jie HE Ya-Ling Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education School of Energy and Power EngineeringXi’an Jiaotong UniversityXi’an710049China

Effective thermal conductivity and thermal tortuosity are crucial parameters for evaluating the effectiveness of heat conduction within porous *** direct pore-scale numerical simulation method is applied to investigate the heat conduction processes inside porous structures with different *** thermal conduction performances of idealized porous structures are directly compared with real foams across a wide range of *** foam structures are reconstructed using X-ray computed tomography and image processing techniques,while Kelvin and Weaire-Phelan structures are generated through periodic unit cell *** detailed temperature fields inside the porous structures are determined by solving the heat conduction equation at the pore *** results present that the equivalent thermal conductivity of Kelvin and Weaire-Phelan structures is similar to and greater than that of the real foam structure with the same strut *** thermal tortuosity of real foam structure is relatively larger and the heat conduction path becomes straighter by adopting the anisotropic *** thermal tortuosity of the fluid channels for Kelvin,Weaire-Phelan,and real foam structures is close to *** thermal conductivity of porous structures with heat transfer fluid increases as the thermal conductivity ratio of fluid to solid becomes larger.A small porosity of porous media leads to a larger equivalent thermal conductivity due to the dominant contribution of porous skeleton in the heat conduction *** derived from parallel and series models,as well as the Maxwell-Eucken models,provide decent predictions of effective thermal conductivity,with an average error of less than 8%in the entire range of thermal conductivity ratio.

关键词： volumetric solar receiver porous morphology direct pore-scale simulation equivalent thermal conductivity thermal tortuosity empirical correlation

中华民族现代文明:理论内涵、时代要求与世界意义

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海南大学学报（人文社会科学版） 2025年第1期43卷 1-7,F0002页

作者：董慧华中科技大学马克思主义学院湖北武汉430074 华中科技大学国家治理研究院湖北武汉430074

建设中华民族现代文明谱写了全面推进强国建设、民族复兴的新篇章,“新”就新在它既是一个新概念、一种新问题,也代表着一种新思维,彰显了习近平总书记对文化建设的深入思考。中华民族现代文明作为中国式现代化的文明成果,是党的百年文... 详细信息

建设中华民族现代文明谱写了全面推进强国建设、民族复兴的新篇章,“新”就新在它既是一个新概念、一种新问题,也代表着一种新思维,彰显了习近平总书记对文化建设的深入思考。中华民族现代文明作为中国式现代化的文明成果,是党的百年文化建设的宏阔升华,它厚植于中华文明与马克思主义融通结合的沃土,体现了对全人类共同价值的时代追寻。习近平文化思想为建设中华民族现代文明提供根本的理论指引、思想指引、精神指引和使命指引。建设中华民族现代文明,是对时代问题的积极回应,必须坚定文化自信、深化文明互鉴、推进文化传播,推动中华文明焕发时代荣光。

关键词：中华民族现代文明中华文明文化自信中国式现代化

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Design and Experimental Verification of a Roll Control Strategy for Large Wingspan Flapping-Wing Aerial Vehicle

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Journal of Bionic Engineering 2024年第4期21卷 1644-1661页

作者： Rui meng Bifeng Song Jianlin Xuan Xiaojun Yang dong Xue School of Aeronautics Northwestern Polytechnical UniversityXi’an710072China Research and Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen518057China Yangtze River Delta Research Institute of Northwestern Polytechnical University Taicang215400China

Most flapping-wing aircraft wings use a single degree of freedom to generate lift and thrust by flapping up and down,while relying on the tail control surfaces to manage ***,these aircraft have certain limitations,such as poor accuracy in attitude control and inadequate roll control *** paper presents a design for an active torsional mechanism at the wing's trailing edge,which enables differential variations in the pitch angle of the left and right wings during *** simple mechanical form significantly enhances the aircraft's roll control *** experimental verification of this mechanism was conducted in a wind tunnel using the RoboEagle flapping-wing aerial vehicle that we *** study investigated the effects of the control strategy on lift,thrust,and roll moment during flapping ***,the impact of roll control on roll moment was examined under various wind speeds,flapping frequencies,angles of attack,and wing ***,several rolling maneuver flight tests were performed to evaluate the agility of RoboEagle,utilizing both the elevon control strategy and the new roll control *** results demonstrated that the new roll control strategy effectively enhances the roll control capability,thereby improving the attitude control capabilities of the flapping-wing aircraft in complex wind field *** conclusion is supported by a comparison of the control time,maximum roll angle,average roll angular velocity,and other relevant parameters between the two control strategies under identical roll control input.

关键词： Roll control Bio-inspired Roll moment Flapping wing aerial vehicle

Fenton reactions drive nucleotide and ATP syntheses in cancer

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Journal of Molecular Cell Biology 2018年第5期10卷 448-459页

作者： Huiyan Sun Chi Zhang sha Cao Tao Sheng Ning dong Ying Xu College of Computer Science and Technology Jilin University Changchun China Computational Systems Biology Lab Department of Biochemistry and Molecular Biology and institute of Bioinformatics University of Georgia GA USA School of Public Health Jilin University Changchun China The First Hospital of Jilin University Changchun China

We present a computational study of tissue transcriptomic data of 14 cancer types to address： what may drive cancer cell division？ Our analyses point to that persistent disruption of the intraceUular pH by Fenton reactions may be at the root of cancer development. Specifically, we have statistically demonstrated that Fenton reactions take place in cancer cytosoi and mitochondria across all the 14 cancer types, based on cancer tissue gene-expression data integrated via the Michaelis-Menten equation. In addition, we have shown that （i） Fenton reactions in cytosol of the disease cells will continuously increase their pH, to which the cells respond by generating net protons to keep the pH stable through a combination of synthesizing glycolytic ATPs and consuming them by nucleotide syntheses, which may drive cell division to rid of the continuously synthesized nucleotides; and （ii） Fenton reactions in mitochondria give rise to novel ways for ATP synthesis with electrons ultimately coming from H2O2, largely originated from immune cells. A model is developed to link these to cancer development, where some mutations may be selected to facilitate cell division at rates dictated by Fenton reactions.

关键词： cancer driver Fenton reaction gene-expression data intracellular pH Warburg effect

Low-carbon development policies and achievements in the context of the livestock sector in China

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Frontiers of Agricultural Science and Engineering 2024年第3期11卷 367-380页

作者： sha WEI Junming FAN Yanfeng TIAN Hongmin dong Institute of Environmental and Sustainable Development in Agriculture Chinese Academy of Agriculture SciencesBeijing 100081China Inner Mongolia YouRan Dairy Co. Ltd.Hohhot 010070China

Rapid growth and a vast transition of Chinese livestock industry driven by economic incentives make it become an important contributor on climate change over the last four *** study first analyzes the evolving lowcarbon livestock development policies and regulations,then an assessment and explanations of the achievements and non-achievements are *** findings reveal that China began to pay attention to low-carbon development policy starting in the early ***,only after the cyclic and green concept became the main sustainable development policy,China began to move seriously toward low-carbon livestock *** policy instruments were introduced,including moderate scale,feed optimization,manure resource utilization,facility and equipment allocation rate,energy conservation and ***,achievements were made in introducing such ***,due to the large share of standard agriculture and regional resources,and environmental diversity,such policies may have little effect in *** divergence between the policies and actual practices are explained,and important policies applicable to all developing countries are also recommended.

关键词： Low carbon livestock development policy recommendations divergence carbon market