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Acta Metallurgica Sinica(English Letters) 2024年第6期37卷 1047-1065页

作者： Mengwei Wu Chunmei Ma ruiping liu Huadong Fu Department of Materials Science and Engineering China University of Mining and Technology(Beijing)Beijing100083China Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing100083China

Improving the shape memory effect and superelasticity of Cu-based shape memory alloys(SMAs)has always been a research hotspot in many *** work systematically investigates the effects of Gyroid triply periodic minimal surface(TPMS)lattice structures with different unit sizes and volume fractions on the manufacturing viability,compressive mechanical response,superelasticity and heating recovery properties of CuAlMn *** results show that the increased specific surface area of the lattice structure leads to increased powder adhesion,making the manufacturability proportional to the unit size and volume *** compressive response of the CuAlMn SMAs Gyroid TPMS lattice structure is negatively correlated with the unit size and positively correlated with the volume *** superelastic recovery of all CuAlMn SMAs with Gyroid TPMS lattice structures is within 5%when the cyclic cumulative strain is set to be 10%.The lattice structure shows the maximum superelasticity when the unit size is 3.00 mm and the volume fraction is 12%,and after heating recovery,the total recovery strain increases as the volume fraction *** study introduces a new strategy to enhance the superelastic properties and expand the applications of CuAlMn SMAs in soft robotics,medical equipment,aerospace and other fields.

关键词： Shape memory alloys Superelasticity Gyroid triply periodic minimal surface(TPMS)lattice structure Selective laser melting(SLM)

A three-dimensional co-continuous network structure polymer electrolyte with efficient ion transport channels enabling ultralong-life all solid-state lithium metal batteries

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Journal of Energy Chemistry 2024年第7期94卷 635-645页

作者： Meng Wang Hu Zhang Yewen Li ruiping liu Huai Yang School of Chemical&Environmental Engineering China University of Mining and Technology(Beijing)Beijing 100083China Beijing Advanced Innovation Center for Materials Genome Engineering&School of Materials Science and Engineering Peking UniversityBeijing 100871China

Solid polymer electrolytes(SPEs)have emerged as one of the most promising candidates for the construction of solid-state lithium batteries due to their excellent flexibility,scalability,and interface compatibility with ***,a novel all-solid polymer electrolyte(PPLCE)was fabricated by the copolymer network of liquid crystalline monomers and poly(ethylene glycol)dimethacrylate(PEGDMA)acts as a structural frame,combined with poly(ethylene glycol)diglycidyl ether short chain interspersed serving as mobile ion transport *** preparaed PPLCEs exhibit excellent mechanical property and out-standing electrochemical performances,which is attributed to their unique three-dimensional cocontinuous structure,characterized by a cross-linked semi-interpenetrating network and an ionic liquid phase,resulting in a distinctive nanostructure with short-range order and long-range ***,the addition of PEGDMA is proved to be critical to the comprehensive performance of the PPLCEs,which effectively modulates the microscopic morphology of polymer networks and improves the mechanical properties as well as cycling stability of the solid *** used in a lithiumion symmetrical battery configuration,the 6 wt%-PPLCE exhibites super stability,sustaining operation for over 2000 h at 30 C,with minimal and consistent overpotential of 50 *** resulting Li|PPLCE|LFP solid-state battery demonstrates high discharge specific capacities of 160.9 and 120.1 mA h g^(-1)at current densities of 0.2 and 1 C,*** after more than 300 cycles at a current density of 0.2 C,it retaines an impressive 73.5%***,it displayes stable cycling for over 180 cycles at a high current density of *** super cycle stability may promote the application for ultralong-life all solid-state lithium metal batteries.

关键词： Solid-state electrolyte Lithium-metal batteries Liquid crystalline polymer Copolymer 3D co-continuous structure Long cycle stability

Machine learning-assisted efficient design of Cu-based shape memory alloy with specific phase transition temperature

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International Journal of Minerals,Metallurgy and Materials 2024年第4期31卷 773-785页

作者： Mengwei Wu Wei Yong Cunqin Fu Chunmei Ma ruiping liu Department of Materials Science and Engineering China University of Mining&Technology(Beijing)Beijing 100083China Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China

The martensitic transformation temperature is the basis for the application of shape memory alloys(SMAs),and the ability to quickly and accurately predict the transformation temperature of SMAs has very important practical *** this work,machine learning(ML)methods were utilized to accelerate the search for shape memory alloys with targeted properties(phase transition temperature).A group of component data was selected to design shape memory alloys using reverse design method from numerous unexplored *** modeling and feature modeling were used to predict the phase transition temperature of the shape memory *** experimental results of the shape memory alloys were obtained to verify the effectiveness of the support vector regression(SVR)*** results show that the machine learning model can obtain target materials more efficiently and pertinently,and realize the accurate and rapid design of shape memory alloys with specific target phase transition *** this basis,the relationship between phase transition temperature and material descriptors is analyzed,and it is proved that the key factors affecting the phase transition temperature of shape memory alloys are based on the strength of the bond energy between *** work provides new ideas for the controllable design and performance optimization of Cu-based shape memory alloys.

关键词： machine learning support vector regression shape memory alloys martensitic transformation temperature

Homovalent doping: An efficient strategy of the enhanced TiNb2O7 anode for lithium-ion batteries

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Green Energy & Environment 2024年第8期9卷 1257-1266页

作者： Xiaohe Jin Yirui Deng Han Tian Miaomiao Zhou Wenhao Tang Huiyou Dong Xinquan Zhang ruiping liu Department of Materials Science and Engineering China University of Mining & Technology (Beijing) Department of Materials Science and Engineering China University of Mining&Technology (Beijing)

The low energy density,unsatisfied cycling performance,potential safety issue and slow charging kinetics of the commercial lithium-ion batteries restrained their further application in the fields of fast charging and long-haul electric *** TiNb2O7（TNO） with the theoretical capacity of 387 mAh g-1has been proposed as a high-capacity anode materials to replace *** this work,homovalent doping strategy was used to enhance the electrochemical performance of Ti Nb2O7（TNO） by employing Zr to partial substitute Ti through solvothermal *** doping of Zr4+ions can enlarge the lattice structure without changing the chemical valence of the original elements,refine and homogenize the grains,improve the electrical conductivity,and accelerate the ion diffusion kinetics,and finally enhance the cycle and rate ***,Z0.05-TNO shows initial discharge capacity of as high as 312.2 mAh g-1at 1 C and 244.8 mAh g-1at 10 C,and still maintains a high specific capacity of 171.3 mAh g-1after 800 cycles at 10 *** study provides a new strategy for high-performance fastcharging energy storage electrodes.

关键词： Homovalent doping Zr 4+ TiNb 2 O 7 Microsphere Lithium-ion batteries

公安院校学生调查研究实践存在问题及能力培养策略

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山西警察学院学报 2024年第3期32卷 114-121页

作者：刘瑞平中国人民公安大学北京100038

调查研究是我们党的传家宝,是做好各项工作的基本功。公安院校学生是共和国预备警官,对其调查研究能力的培养关乎到未来公安队伍的整体素质和战斗力。目前公安院校学生在调查研究的实践过程中存在着贯彻实事求是的思想路线不全面、缺乏... 详细信息

调查研究是我们党的传家宝,是做好各项工作的基本功。公安院校学生是共和国预备警官,对其调查研究能力的培养关乎到未来公安队伍的整体素质和战斗力。目前公安院校学生在调查研究的实践过程中存在着贯彻实事求是的思想路线不全面、缺乏问题意识、社会调查方法的知识储备不足等问题。公安院校培养学生调查研究能力这一基本功,需要注重培养其发现问题能力、社会调查方法应用能力、人际沟通能力、数据分析能力和成果转化能力,可以通过完善社会调查课程体系、实施参与式教学模式、建立调查研究实践平台等多种策略解决学生调查研究能力培养存在的问题,提高其调查研究综合能力。

关键词：调查研究公安院校教学模式实践平台

鄂尔多斯盆地西北部下白垩统物源定量分析研究

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地学前缘 2024年第3期31卷 80-99页

作者：刘持恒李子颖贺锋张字龙李振成凌明星刘瑞萍核工业北京地质研究院中核集团铀资源勘查与评价重点实验室北京100029 核工业北京地质研究院核工业地质分析测试研究中心北京100029 东华理工大学核资源与环境国家重点实验室江西南昌330013 核工业二〇八大队内蒙古包头014010

下白垩统是鄂尔多斯盆地晚中生代的一个重要构造层,同时也是近年来新发现砂岩型铀矿的重要层位。恢复该时期的源汇系统对认识燕山运动晚期在华北克拉通西部的构造沉积响应、古气候转变和盆地内砂岩铀矿的富集规律均有较大的帮助。本文... 详细信息

下白垩统是鄂尔多斯盆地晚中生代的一个重要构造层,同时也是近年来新发现砂岩型铀矿的重要层位。恢复该时期的源汇系统对认识燕山运动晚期在华北克拉通西部的构造沉积响应、古气候转变和盆地内砂岩铀矿的富集规律均有较大的帮助。本文通过对鄂尔多斯盆地西北部下白垩统进行古流向测量、不同层位碎屑锆石U-Pb测年,优化周缘潜在物源区锆石U-Pb年龄数据集的汇编方案,定量计算出各物源区对盆内的碎屑贡献比例,恢复了鄂尔多斯盆地西北部早白垩世的源汇系统。研究结果表明,鄂尔多斯盆地西北部下白垩统中碎屑锆石具有1.79~1.64 Ga、2.02~1.82 Ga和2.58~2.45 Ga 3个稳定的前寒武纪年龄峰值,以及336~257 Ma和476~425 Ma两个稳定的显生宙年龄峰值。定量的物源分析结果表明,阴山、狼山、桌子山贺兰山和阿拉善地区以不同的贡献比例为研究区提供物源,具多物源同时供给的特征。阴山在整个早白垩世一直是主要的物源供给区,与狼山共同向盆地内部提供河流相沉积。阿拉善地区则通过原地风蚀将物质从桌子山北部和贺兰山顶以风沙搬运的方式带入鄂尔多斯盆地,在洛河罗汉洞沉积期共同构成了研究区风成与水成交替的沉积特征。

关键词：鄂尔多斯盆地碎屑锆石U-Pb年龄物源分析古流向砂岩型铀矿源汇系统

Review on heterogeneous oxidation and adsorption for arsenic removal from drinking water

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Journal of Environmental Sciences 2021年第12期33卷 178-188页

作者： ruiping liu Jiuhui Qu Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution ControlSchool of EnvironmentTsinghua UniversityBeijing 100084China

The long term exposure of arsenic via drinking water has resulted in wide occurrence of arsenisim globally, and the oxidation of the non-ionic arsenite(As(Ⅲ)) to negatively-charged arsenate(As(Ⅴ)) is of crucial importance for the promising removal of arsenic. The chemical oxidants of ozone, chlorine, chlorine dioxide, and potassium permanganate may achieve this goal;however, their application in developing countries is sometimes restricted by the complicate operation and high cost. This review paper focuses on the heterogeneous oxidation of As(Ⅲ) by solid oxidants such as manganese oxide, and the adsorption of As(Ⅴ)accordingly. Manganese oxide may be prepared by both chemical and biological methods to achieve good oxidation performance towards As(Ⅲ). Additionally, manganese oxide may be combined with other metal oxides, e.g., iron oxide, to improve the adsorption capability towards As(Ⅴ). Furthermore, manganese oxide may be coated onto porous materials of metal organic frameworks to develop novel adsorbents for arsenic removal. To achieve the application in engineering works, the adsorbents granulation may be achieved by drying and calcination, agglomeration, and the active components may also be in situ coated onto the porous materials to maintain the oxidation and adsorption activities as much as possible. The novel adsorbents with heterogeneous oxidation and adsorption capability may be carefully designed for the removal of arsenic in household purifiers, community-level decentralized small systems, and the large-scale drinking water treatment plants(DWTPs).This review provides insight into the fundamental studies on novel adsorbents, the development of innovative technologies, and the demonstration engineering works involved in the heterogeneous oxidation and adsorption, and may be practically valuable for the arsenic pollution control globally.

关键词： Arsenic Heterogeneous oxidation Adsorption Manganese oxide Drinking water

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拇外翻老年人坐立过程中的肌肉协同特征分析

实用医学杂志 2024年第10期40卷 1376-1381页

作者：刘燕燕钱蕾刘瑞平欧阳钧刘刚南方医科大学南方医院康复理疗科广州510515 南方医科大学基础医学院人体解剖学教研室广东省数字医学与生物力学重点实验室广州510515 中山大学深圳校区医学院解剖学系广东深圳518107

目的通过肌肉协同分析拇外翻老年人坐立(sit-to-stand,STS)过程中神经肌肉控制的改变,从而探讨拇外翻老年人对跌倒的影响。方法本研究纳入4组受试者:13例年轻对照组(YC);12例年轻拇外翻组(HVY);14例健康老年对照组(EC);15例老年拇外翻组... 详细信息

目的通过肌肉协同分析拇外翻老年人坐立(sit-to-stand,STS)过程中神经肌肉控制的改变,从而探讨拇外翻老年人对跌倒的影响。方法本研究纳入4组受试者:13例年轻对照组(YC);12例年轻拇外翻组(HVY);14例健康老年对照组(EC);15例老年拇外翻组(HVE)。所有受试者都在无扶手的椅子上完成STS动作,使用非负矩阵分解对肌电图的数据进行整合,以比较YC、HVY、EC和HVE组的肌肉协同作用;采集足底压力(COP),地面反作用力(GRF)和跌倒评分(FES-I)。结果与YC组相比,HVY、EC、HVE组在STS准备阶段拇展肌和腓肠肌外侧的相对激活振幅降低;同时EC组、HVE组在STS稳定阶段需要更多的维持躯干和足踝关节稳定性的肌肉激活;HVE组需要更多的大腿肌肉的共收缩来维持膝关节的稳定。HVE组的COP、FES-I比其他各组高(P<0.05)。结论在STS中,健康老年人和拇外翻老年人需要更多的维持躯干和足踝关节稳定性的肌肉激活;拇外翻老年人需要更多的大腿肌肉的共收缩来维持膝关节的稳定;除此之外,拇外翻老年人更容易跌倒。

关键词：老年拇外翻肌肉协同坐立运动非负矩阵分解

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氯气透平机运行故障预防措施

中国氯碱 2024年第4期 28-32,56页

作者：唐继平刘瑞平新疆天业集团石河子天域新实化工有限公司新疆石河子

介绍了氯气透平机工艺流程、工作原理及主要系统组成,从设备、工艺角度总结了氯气透平机运行中的主要故障,提出了预防氯气透平机故障的几点措施。

关键词：氯气透平机故障预防措施

Characterization of the Songhua River sediments and evaluation of their adsorption behavior for nitrobenzene

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Journal of Environmental Sciences 2008年第7期20卷 796-802页

作者： liu ruiping liu Huijuan Wan Dongjin Yang Min Chinese Acad Sci Ecoenvironm Sci Res Ctr Beijing 100085 Peoples R China Chinese Acad Sci Grad Univ Beijing 100049 Peoples R China

The explosion at a plant of the Jilin Petrochemical Corporation on 13 November,2005,and the spill of an estimated 100 t of toxic substances (nitrobenzene as the main component) into the Songhua River received worldwide *** study has focused on the adsorption behavior of nitrobenzene that spilled onto sediments along the Songhua River,which was one of the efforts to evaluate the fate of nitrobenzene after the spillage *** organic carbon contents of these sediments along the Songhua River var...

关键词： nitrobenzene adsorption sediment characteristics organic carbon content particle size distribution