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Journal of Energy Chemistry 2020年第9期29卷 187-194,I0006页

作者： Yue chen Xiaoming Qiu Li-Zhen Fan Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Shanxi Key Laboratory of New Energy Materials and Devices Taiyuan University of TechnologyTaiyuan 030024ShanxiChina

Nitrogen-rich porous carbonaceous materials have shown great potential in energy storage and conversion applications due to their facile fabrication,high electronic conductivity,and improved hydrophilic ***,three-dimensional porous N-rich carbon foams are fabricated through a one-step carbonization-activation method of the commercial melamine foam,and displaying hierarchically porous structure(macro-,meso-,and micro-pores),large surface area(1686.5 m2 g^-1),high N-containing level(3.3 at%),and excellent *** as-prepared carbon foams as electrodes for quasi-solid-state supercapacitors exhibit enhanced energy storage ability with 210 F g^-1 and 2.48c at 0.1 A g^-1,and150 F g^-1 and 1.77 F cm^-2 at 1 A g^-1,***,as an electrode for lithium-based dual-ion capacitor,this distinctive porous carbon also delivers remarkable specific capacitance with 143.6 F g^-1 at0.1 A g^-1 and 116.2 F g^-1 at 1 A g^-*** simple preparation method and the fascinating electrochemical performance endow the N-rich porous carbon foams great prospects as high-performance electrodes for electrochemical energy storage.

关键词： Nitrogen-rich Carbon foam Hierarchically porous structure Dual-ion capacitor

SCALING EXPONENT FOR 3-STATE POTTS MODEL ON 3-DIMENSIONAL RANDOM TRIANGLE LATTICE

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Chinese Physics Letters 1990年第12期7卷 533-536页

作者： chen Tianlun HUANG Wuqun Department of Physics Nankai UniversityTianjin 300071

An optimal Monte Carlo renormalization group method is applied to 3-state Potts model on 3-dimensional random triangle *** scaling exponent v of the first order phase transition of this model has been *** the disorder phase v=0.369(±0.044),y_(T)=1/ν=2.71(±0.32),in the order phase ν=0.393(±0.048),y_(T)=2.54(±0.31).They approximate to the prediction of the scaling theory.

关键词： theory. scaling triangle

Tailoring magnetostriction and magnetic domains of <100>-oriented Fe80Ga16Al4 alloy by magnetic field annealing

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Rare Metals 2021年第3期40卷 563-569页

作者： Xin-Lei Wang Yuan Liu Xiang chen School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China Key Laboratory for Advanced Materials Processing Technology Ministry of Education Beijing 100084China

Magnetic field annealing(MFA) was used to tailor the magnetostriction and magnetic domains of Fe80Ga16Al4 alloy,and the relationship between the two characteristics was *** -oriented alloy was prepared by the directional solidification technique and annealed for 20 min at 700℃ in a magnetic field of 250 mT along a direction 45 ° to the orientation,followed by furnace cooling in the same magnetic *** magnetostriction along the length direction(λ‖),the width direction(λ丄) and the saturation magnetostriction(λs) was changed from λ‖=208 × 10^(-6) and λ丄=-16 × 10^(-6) of the initial alloy to λ‖≈λ丄≈ 1/2 λs ≈ 112 × 10^(-6)after *** magnetic domain structure,which mainly refers to the number,size,and direction of the domains,was tailored and rearranged by *** rearrangement of the magnetic domain structure resulted in a shift of magnetostrictive properties parallel and perpendicular to the orientation for the Fe80Ga16A14 *** magnetic field annealing method can aid understanding of the relationship between the microscopic magnetic domains and the macroscopic magnetostrictive *** can also aid in further tailoring better magnetostrictive properties within magnetostrictive materials to meet the requirements of different application conditions.

关键词： FeGa alloy Magnetic field annealing Magnetostriction Magnetic domain

Fault Location Detection of Transmission Lines in Noise Environments Based on Random Matrix Theory

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CSEE Journal of Power and Energy Systems 2022年第4期8卷 1233-1241页

作者： Jun An Zihan Deng Haipeng chen Gang Mu Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology Ministry of Education(Northeast Electric Power University)Jilin 132012.Jilin ProvinceChina

Fault detection and location are critically significant applications of a supervisory control system in a smart *** methods,based on random matrix theory(RMT),have been practiced using measurements to detect short circuit faults occurring on transmission ***,the diagnostic accuracy is infuenced by the noise signal in the *** relationship between mean eigenvalue of a random matrix and noise is detected in this paper,and the defects of the Mean Spectral Radius(MSR),as an indicator to detect faults,are theoretically determined,along with a novel indicator of the shifting degree of maximum eigenvalue and its *** comparing the indicator and the threshold,the occurrence of a fault can be ***,an augmented matrix is constructed to locate the fault *** proposed method can effectively achieve fault detection via the RMT without any influence of noise,and also does not depend on system *** experiment results are based on the IEEE 39-bus ***,actual provincial grid data is applied to validate the effectiveness of the proposed method.

关键词： Fault detection maximum eigenvalue noise random matrix theory smart grid

Zero Sequence Voltage and Current Control in Four-wire Grids-fed by Grid-forming Inverters

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CSEE Journal of Power and Energy Systems 2023年第6期9卷 2272-2279页

作者： Zixian Zhu Wei chen Vito Giuseppe Monopoli the College of Electrical And Information Engineering Hunan UniversityChangshaChina the College of Electrical and Information Engineering Lanzhou University of TechnologyLanzhouChina the Department of Electrical and Information Engineering Bari PolytechnicBariItaly

Low voltage three-phase four-wire AC distribution grids may experience high neutral current,mainly caused by asymmetrical distribution of single-phase loads in three *** neutral current will not only increase line losses but also result in neutral potential *** the LV AC distribution grid established by a grid-forming inverter(e.g.,uninterruptible power supply and solid-state-transformer),it also suffers from the same neutral current ***,this paper comparatively studies several neutral current control approaches and their impacts on grid voltage balance,which is required by grid ***,this paper proposes an optimal neutral current control approach,which can obtain maximum neutral current suppression with less impact on grid voltage *** correctness of the theoretical analysis is validated through both simulation and experimental results.

关键词： LV AC grid neutral current reduction grid-forming inverter three-phase four-wire system

Advancements in the development of liquid organic hydrogen carrier systems and their applications in the hydrogen economy

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Progress in Natural Science:Materials International 2024年第5期34卷 825-839页

作者： Alexis Munyentwali Khai chen Tan Teng He Dalian Institute of Chemical Physics Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences

The transition towards sustainable and clean energy systems has become a significant concern in the modern world. Hydrogen has the potential to meet the growing energy demands while addressing greenhouse gas emissions. However, one major obstacle in utilizing hydrogen as a fuel is the lack of efficient and cost-effective storage methods. In this regard, liquid organic hydrogen carriers(LOHCs) offer several advantages, including high hydrogen storage capacity, improved safety compared to traditional storage methods, and the ability to transport hydrogen using existing liquid fuels' infrastructure. This review summarizes advancements in the development of LOHC systems for hydrogen storage, with a focus on the latest and innovative systems such as those based on dehydrogenative coupling reactions, renewable LOHCs from lignocellulosic biomass, and the development of LOHCs from plastic waste recycling. In addition to the material aspect, this contribution also discusses various applications of LOHCs in the broader context of the hydrogen economy, including a recently proposed concept of mixed gas hydrogenation of LOHCs for realizing hydrogen purification and storage in a single process step. By highlighting the main advantages and challenges of each LOHC system and providing future directions in the development of efficient LOHC systems, this review aims to contribute to an extensive understanding and advancement of LOHCs in the evolving hydrogen-based economy.

关键词： Dehydrogenation Hydrogen economy Hydrogen storage Hydrogenation Liquid organic hydrogen carriers (LOHCs)

Health risk assessment for typical and abandoned chromium-contaminated sites

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Chinese Journal Of Geochemistry 2014年第4期33卷 382-386页

作者： DENG Hongyan chen Gangcai Faculty of Urban Construction and Environmental Engineering Chongqing University Chongqing Academy of Environmental Sciences

Chromium pollution were investigated by sampling the abandoned chromium contaminated sites in Chongqing. Its health risk was assessed following the procedures made by USEPA. The results showed that the most seriously polluted land was found at the former production area(G4) with average Cr(VI) concentration of 3369.2 mg·kg-1 on the surface soil. The assessment indicated that there was high risk of non-carcinogens for children. The assessed risk of the first layer of office area(G1) for children, chromium slag transition(G2), drainage pipeline chromium slag transition(G3) and production area(G4) for both children and adults were not acceptable(>1.00×10-6). It was strongly suggested that the accessible measures of remediation should be taken for a portion of contaminated sites before the reuse of abandoned lands.

关键词：健康风险评估污染场地铬污染美国环保局铬(VI) 表层土壤致癌物质排水管道

Baicalin interferes with iron accumulation in C6 glioma cells

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Neural Regeneration Research 2011年第30期6卷 2352-2356页

作者： Chunyan Guo Xin chen Traditional Chinese Medicine School Capital Medical University Beijing 100069 China

Baicalin reacts with ferric ammonium citrate and acts as an-iron chelator. The maximal reaction time for baicalin to interact with irons was approximately 3 hours. C6 glioma cell survival decreased following iron-loading, with a large number of cells accumulating iron. In addition, lipid peroxidation increased. Iron accumulation and lipid peroxidation were the major cause of cellular death. Baicalin and ferric ammonium citrate alleviated iron accumulation in C6 cells and lowered the mortality of nerve cells. In addition, malondialdehyde and lactate dehydrogenase levels reduced. These results indicate that baicalin strongly inhibits lipid peroxidation via chelation, reduces the content of iron in C6 cells, lowers lipid peroxidation, and thus plays a protective role against iron-induced nerve cell death.

关键词： baicalin iron iron chelation neuroprotection Parkinson's disease

New Exact Solutions of the CDGSK Equation Related to a Non-local Symmetry

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Chinese Physics Letters 1994年第10期11卷 593-596页

作者： LOU Senyue RUAN Hangyu chen Weizhong WANG Zhenli chen Lili Fudan-T.D.Lee Physics Laboratory Fudan UniversityShanghai 200433 Institute of Modern Physics Ningbo Normal CollegeNingbo 315211

A non-local symmetry of the Caudrey-Dodd-Gibbon-Sawada-Kotera(CDGSK)equation has been used for finding exact solution in two different ***,using the standard prolongation approach,we obtain the finite Lie Bäcklund transformation and the single soliton ***,combining some local symmetries and the nonlocal symmetry,we get the group invariant solution which is described by the Weierstrass elliptic function and is deduced to the so-called interacting soliton for a special parameter.

关键词： parameter. solution. soliton

Neural Network in Tau Decay Mode Identification

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Chinese journal of nuclear physics 1996年第3期18卷 137-144页

作者： chen, Gang chen, Guoming chen, Hesheng Jin, Bingnian Tang, Xiaowei Wang, Yifang Zhang, Zhou Peking Univ Beijing China

A method of neural network identifying tau decay modes is *** systematic errors re-lated to the neural network are discussed in detail.A method is used to analyze one-prong hadronic tau de-cays in L3 experiment.

关键词： —Tau decay Neural computing Systematic error