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Rare Metals 2016年第9期35卷 691-700页

作者： Xiang chen yun-gui chen Yong-Bo Tang Ding-Quan Xiao College of Engineering and Technology Neijiang Teachers Normal UniversityNeijiang 641002China School of Materials Science and Engineering Sichuan UniversityChengdu 610065China

The effects of the introduction of Ce to La（1-x）CexFe（11.5）Si（1.5） alloys on 1：13 phase formation mechanism,the first-order magnetic phase transition strengthening characteristics,and magnetocaloric property were studied,*** results show that the formation mechanisms of 1：13 and La Fe Si phases in La（1-x）CexFe（11.5）Si（1.5） alloys are the same as those of Ce2Fe（17） and CeFe2 phases in Ce–Fe binary system,*** substitution of Ce in 1：13 phase which is limited can make the first-order magnetic phase transition characteristics strengthen,which can make thermal and magnetic hysteresis increase,the temperature interval of temperatureinduced phase transition decrease,and the critical magnetic field of field-induced magnetic phase transition（HC）increase,*** to the lattice shrink of 1：13phase with the increase in Ce content,the Curie temperatures（TC） show a linear *** maximum change in magnetic entropy gradually increases due to the decrease in temperature interval of temperature-induced phase transition,but the relative cooling capacities are all about80 Jákg-1at magnetic field of 2 T.

关键词： La1-xCexFe1 5Si1 5alloys Short-time annealing Large magnetocaloric effect Magnetocaloric materials

A Characterization of Almost Simple K_3-groups

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Acta Mathematica Sinica,English Series 2015年第11期31卷 1739-1750页

作者： Yan Xiong YAN Hai Jing XU gui yun chen School of Mathematics and Statistics Southwest University Faculty of Education Southwest University

It is a well-known fact that characters of a finite group can give important information about the group＇s structure. Also it was proved by the third author of this article that a finite simple group can be uniquely determined by its character table. Here the authors attempt to investigate how to characterize a finite almost simple group by using less information of its character table, and successfully characterize the almost simple K3-groups by their orders and at most three irreducible character degrees of their character tables.

关键词： Finite group irreducible character character degree simple group

On Coprime G-conjugacy Class Sizes in a Normal Subgroup

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Acta Mathematica Sinica,English Series 2014年第9期30卷 1588-1594页

作者： Xian He ZHAO Hai Peng QU gui yun chen College of Mathematics and Information Science He 'nan Normal University Xinxiang 453007 P. R. China Department of Mathematics Shanxi Normal University Linfen 041004 P. R. China School of Mathematics and Statistics Southwest University Chongqing 400715 P. R. China

Let N be a normal subgroup of a group G. Suppose that the positive integers m 〉 n are two longest non-central G-conjugacy class sizes of N with （m, n） = 1. The purpose of this paper is to determine the structure of... 详细信息

关键词： Normal subgroups G-conjugacyclass sizes Frobenius group

Hydrogenation behaviors and characteristics of bulk Ti-6Al-4V alloy at different isothermal temperatures

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Rare Metals 2019年第12期38卷 1131-1135页

作者： Long Pan Chun-Ming Wang Su-Fen Xiao yun-gui chen School of Aeronautics and Astronautics Sichuan UniversityChengdu 610065China College of Materials Science and Engineering Sichuan UniversityChengdu 610065China

The bulk Ti-6Al-4V alloy was hydrogenated at the temperature range of 723-973 K,and the hydrogen absorption characteristics and hydrogen absorption kinetics were *** results show that there are two types of hydrogen absorption characteristics at different *** hydrogen content decreases,and the time reaching reaction equilibrium is shorten with the isothermal hydrogenation temperature ***,the mechanism of the hydrogen absorption kinetics is different at different *** incubation period exists at the initial hydrogen absorption stage below 823 K,and K(a2)(the reaction rate constant of Stage 2)>>K(a1)(the reaction rate constant of Stage 1).And there is no incubation period over 823 K,K(a1)>>K(a2).

关键词： Bulk Ti-6Al-4V alloy Hydrogen content Hydrogen absorption kinetic Temperature

Vanadium-based alloy for hydrogen storage:a review

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Rare Metals 2024年第12期43卷 6201-6232页

作者： Han-Yang Kong Qing-Feng Xie Chao-Ling Wu Yao Wang yun-gui chen Hai-Wen Li Yi-Gang Yan Institute of New Energy and Low-Carbon Technology Sichuan University College of Materials Science and Engineering Sichuan University Engineering Research Center of Alternative Energy Materials and Devices Ministry of Education Hefei General Machinery Research Institute

Storage of hydrogen in solid-state materials offers a safer and compacter way compared to compressed and liquid ***（V）-based alloys attract wide attention,owing to the total hydrogen storage capacity of 3.8 wt% and reversible capacity above 2.0 wt%at ambient conditions,surpassing the AB5-,AB2-and ABtype hydrogen storage ***,several challenges,such as insufficient capacity,cyclic stability and high raw material costs,hinder the practical applications of V-based *** review provides an overview of the recent advances in hydrogen storage properties of V-based *** mechanism and optimization strategies of hydrogen storage properties and cyclic stability are discussed in detail,and furthermore,the approaches to reduce manufacturing costs are compared comprehensively.

关键词： Cheap resources Cycling stability Hydrogen storage Reversible hydrogen capacity Vanadium-based alloys

Effects of solidification rate and excessive Fe on phase formation and magnetoclaoric properties of LaFe_(11.6x)Si_(1.4)

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Transactions of Nonferrous Metals Society of China 2017年第9期27卷 2015-2021页

作者： Xiang chen yun-gui chen Yong-bai TANG Ding-quan XIAO College of Physics and Electronic Information Engineering Neijiang Normal University Neijiang 641002 China School of Materials Science and Engineering Sichuan University Chengdu 610065 China

The effects of solidification rate and excessive Fe on phase formation and magnetocaloric properties of LaFe11.6xSi1.4(x=1.1,1.2)were investigated by XRD,SEM and VSM *** XRD results show that the amount of LaFeSi phase in the as-cast melt-spun ribbons prepared by a copper wheel at a speed of10m/s is less than that in the as-cast arc melting buttons with the same x *** annealed melt-spun ribbons contain smaller amount of La(Fe,Si)13(1:13)phase than the corresponding annealed arc melting *** the melt-spun sample has finer crystalline grains ofα-Fe,as indicated by SEM analysis,its crystalline size has not reached ***,the magnetic exchange-coupling between1:13phase andα-Fe phase has not been observed in melt-spun ***,the maximum negative magnetic entropy change(?SMax)and relative cooling power(RCP)of annealed melt-spun ribbons under a field change of0?2T are weaker than those of the corresponding annealed arc melting buttons.

关键词： LaFe11.6xSi1.4 alloy solidification rate microstructure magnetocaloric properties

Properties enhancement of antimicrobial chitosan-deposited polylactic acid films via cold plasma treatment

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Food and Health 2023年第3期5卷 1-8页

作者： gui-yun chen Tong-Liang Yang Yu-He Wang Shu-Hong Li Ye chen State Key Laboratory of Food Nutrition and Safety Ministry of EducationCollege of Food Science and BiotechnologyTianjin University of Science&TechnologyTianjin 300457China

The present study aimed to understand the effect of dielectric barrier discharge cold plasma(DBD-CP)technology on the antimicrobial chitosan deposition and the properties enhancement of polylactic acid(PLA)*** results indicated that DBD-CP was an effective method for improving the adhesion and surface hydrophilicity of PLA,facilitating the deposition of chitosan *** modification was attributed to the increased surface roughness,as well as the presence of polar functional groups observed through atomic force microscopy,surface free energy and Fourier transform infrared spectroscopy *** study further revealed that both water resistance and mechanical properties were significantly improved after DBD-CP treatment,which was positively correlated with the amount of chitosan deposited on the PLA *** comprehensive evaluation,the treatment at 75 W was determined as the optimal condition for enhancing the ***,the modified film exhibited strong antimicrobial activity against Staphylococcus ***,the DBD-CP technology could be a promising tool for better utilization of PLA-based materials in the antibacterial food packaging industry.

关键词： dielectric barrier discharge cold plasma polylactic acid chitosan antimicrobial packaging

Efficient photocatalytic reduction of CO2 to formate by a molecular noble metal-free system

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Science China Chemistry 2025年第1期68卷 152-156页

作者： Lihua Zhang Lingjing chen Huatian Shi Yue Wei gui chen Tai-Chu Lau School of Environment and Civil Engineering Research Center for Eco-environmental Engineering Dongguan University of Technology Department of Chemistry and Institute of Molecular Functional Materials City University of Hong Kong

Reducing CO2to carbon-neutral solar fuels can not only alleviate the energy demand but also mitigate the greenhouse *** present,developing an efficient non-noble metal photo/electrocatalytic system for converting CO2to a specific product beyond CO is still a big ***,we report a new cobalt complex bearing 2,2′-bi-1,10-phenanthroline ligand that can photocatalytically reduce CO2to formate （HCOO-）.Turnover number （TON） for HCOO-up to 677 with 99%selectivity can be achieved using organic dyes purpurin as photosensitizer and 1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole （BIH） as sacrificial reductant in a CO2-saturated NMP/TEA （v/v,3:1） solution under visible light *** potential electrolysis at-1.41 V （***/Ag Cl） in the presence of 12 m M Et3NHBF4also produced HCOO-with Faradaic efficiency of 39%.Spectroscopic and electrochemical studies suggest that a[CoI-H]species is the key intermediate for CO2reduction.

关键词： photocatalysis noble metal-free CO2 reduction formate cobalt hydride

Effect of Ce,Co,B on formation of LaCo_(13)-structure phase in La(Fe,Si)_(13) alloys

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Transactions of Nonferrous Metals Society of China 2014年第3期24卷 705-711页

作者：陈湘陈云贵唐永柏肖定全四川大学材料科学与工程学院成都610065 内江师范学院工程技术学院内江641002

The effect of Ce, Co, and B on the formation of 1：13 phase in La（Fe, Si）13 alloys was investigated by XRD, SEM and EDS. The results show that Co can improve the formation of 1：13 phase in as-cast LaFe11.6-xCoxSi1.4 alloys, but in as-cast and annealed LaFe11.6Si1.4-xCox alloys, it will hamper the formation of 1：13 phase and help the formation of a-Fe（Co, Si） solid solution. Ce2Fel7 phases will form when x reaches a certain value in as-cast and annealed La1-xCexFe11.5Si1.5 alloys. B can improve the formation of 1：13 phase accompanied with Fe2B phase in as-cast LaFe11.6-xBxSi1.4 alloys. B improves the formation of a-Fe solid solution in LaFe11.6Si1.4-xBx alloys, and there is almost only a-Fe in as-cast and annealed LaFe11.6Si0.9B0.5 alloy. In all, the introduction of Co, B, and Ce cannot eliminate the a-Fe phases in corresponding alloys prepared by the high-temperature and short-time annealing process.

关键词： LaFe13-xSix alloys high-temperature and short-time annealing 1:13 phase

Coordinated Control Strategy of New Energy Power Generation System with Hybrid Energy Storage Unit

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Energy Engineering 2025年第1期122卷 167-184页

作者： yun Zhang ZifenHan Biao Tian Ning chen Yi Fan School of Mechano-Electronic Engineering Xidian UniversityXi’an710071China Electric Power Control Center State Grid Gansu Electric Power CompanyLanzhou730030China Electric Power Control Center State Grid Gansu Electric Power Company Zhangye Power Supply BranchZhangye734000China

The new energy power generation is becoming increasingly important in the power *** as photovoltaic power generation has become a research hotspot,however,due to the characteristics of light radiation changes,photovoltaic power generation is unstable and random,resulting in a low utilization rate and directly affecting the stability of the power *** solve this problem,this paper proposes a coordinated control strategy for a newenergy power generation system with a hybrid energy storage unit based on the lithium iron phosphate-supercapacitor hybrid energy storage ***,the variational mode decomposition algorithm is used to separate the high and low frequencies of the power signal,which is conducive to the rapid and accurate suppression of the power fluctuation of the energy storage ***,the fuzzy control algorithm is introduced to balance the power between energy *** this paper,the actual data is used for simulation,and the simulation results show that the strategy realizes the effective suppression of the bus voltage fluctuation and the accurate control of the internal state of the energy storage unit,effectively avoiding problems such as overshoot and over-discharge,and can significantly improve the stability of the photovoltaic power generation systemand the stability of the Direct Current *** is of great significance to promote the development of collaborative control technology for photovoltaic hybrid energy storage units.

关键词： Photovoltaic power suppression hybrid energy storage unit variationalmodal decomposition fuzzy control power distribution control