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Acta Metallurgica Sinica(English Letters) 2024年第8期37卷 1387-1398页

作者： Zirui Chen Liyuan Wang Jiayu Zhao guanhua cui Zhuo Gao Zhiyuan Fan Xiaohui Shi Junwei Qiao College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China

A refractory high entropy alloy Ti_(62)Nb_(12)Mo_(12)Ta_(12)W_(2)was prepared by mechanical alloying and spark plasma *** microstructure and mechanical properties of the Ti_(62)Nb_(12)Mo_(12)Ta_(12)W_(2)alloy were *** experimental results show that the microstructure of the alloy is composed of two BCC phases,an FCC precipitated phase,and the precipitated phase which is a mixture of TiC,TiN and *** alloy exhibits good room temperature compressive *** plasticity of the sample sintered at 1550℃can reach 10.8%,and for the sample sintered at 1600℃,the yield strength can be up to 2032 MPa,in the meantime the plasticity is 9.4%.The alloy also shows high strength at elevated *** yield strength of the alloy exceeds 420 MPa at 900℃,and value of which is still above 200 MPa when the test temperature reaches 1000℃.Finally,the compressive yield strength model at room temperature is *** prediction error of the model ranges from−7.9%to−12.4%,expressing fair performance.

关键词： Refractory high-entropy alloy(RHEA) Mechanical alloying Mechanical properties Model Spark plasma sintering

Toward molecular models of proton pumping：Challenges,methods and relevant applications

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中国科学：化学 2012年第2期42卷 195-196页

作者： RICCARDI Demian ZHU Xiao GOYAL Puja YANG Shuo HOU guanhua cui Qiang Department of Chemistry and Theoretical Chemistry Institute University of Wisconsin Madison 1101 University Ave Madison W153706 USA

Motivated by several long-lasting mechanistic questions for biomolecular proton pumps,we have engaged in developing hybrid quantum mechanical/molecular mechanical(QM/MM) methods that allow an efficient and reliable description of long-range proton transport in transmembrane *** this review,we briefly discuss several relevant issues:the need to develop a "multi-scale" generalized solvent boundary potential(GSBP) for the analysis of chemical events in large trans-membrane proteins,approaches to validate such a protocol,and the importance of improving the flexibility of QM/MM *** recent studies of model and realistic protein systems are also discussed to help put the discussions into ***,these studies suggest that the QM/MM-GSBP framework based on an approximate density functional theory(SCC-DFTB) as QM holds the promise to strike the proper balance between computational efficiency,accuracy and *** additional improvements in the methodology and recent developments by others,especially powerful sampling techniques,this "multi-scale" framework will be able to help unlock the secrets of proton pumps and other biomolecular machines.

关键词：分子模型质子泵应用密度泛函理论生物分子跨膜蛋白远距离运输机械问题

A comprehensive review of recent advancements and developments in heat exchanger network synthesis techniques

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Science China(Technological Sciences) 2024年第2期67卷 335-356页

作者： XU Yue LIU WeiWei ZHANG Lu cui Guo Min XIAO Yuan ZHANG guanhua YANG QiGuo School of Energy and Power Engineering University of Shanghai for Science and TechnologyShanghai 200093China

The rapid development of computational technology and the increasing energy demand have improved heat exchanger network(HEN)*** HEN synthesis involves several optimizations of matches,distributions of heat loads,and stream splitting of heat ***,obtaining good results at high efficiency has been the main standard for evaluating the techniques in the research area of HEN *** paper first summarizes and analyzes the main contributions of the existing HEN synthesis *** compare related data quantitively,information on ten typical cases is presented in this ***,recently improved solutions for commonly encountered existing literature cases demonstrate the evolution and competition trends in the field of HEN *** comparison data presented in this paper not only provide a useful reference for future research but also present the optimization *** on the findings of this study,it is noted that there is still a large room for improvement,and current approaches are incapable of dealing with all HEN ***,it is still difficult to escape a local optimum and overcome structural constraints when seeking the global *** a follow-up to the current work,the parallel computing mode and adaptively coordinating the ratio of global and local searching abilities are major development trends for future investigation.

关键词： heat integration heat exchanger network synthesis sequential synthesis method simultaneous synthesis method optimization techniques development optimization quality

按各阶构件数表达的运动链结构公式及运动链结构属性分析

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上海海运学院学报 1988年第Z1期 7-14页

作者：崔冠华

本文推导出按各阶构件数表达的平面运动链结构公式、构件的最高价数公式以及各阶构件数最大值公式,并在上述三个公式的基础上,揭示出运动链的一些有价值的结构性质。

关键词：运动链二阶闭式阶数构件运动副元素属性分析

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新见北齐《贾进墓志》考释

燕山大学学报（哲学社会科学版） 2014年第3期15卷 59-62页

作者：崔冠华燕山大学马克思主义学院河北秦皇岛066004

2008年出土于河南安阳的北齐《贾进墓志》,记载了墓主的籍贯、先祖、仕履、性情和卒葬地等情况,具有较高的史料价值。通过对墓志的整理和分析,我们发现,墓志中存在不少疑难问题,如冒袭先祖以抬高身世;"尔朱雕阳王"史无记载,可能有误;贾... 详细信息

2008年出土于河南安阳的北齐《贾进墓志》,记载了墓主的籍贯、先祖、仕履、性情和卒葬地等情况,具有较高的史料价值。通过对墓志的整理和分析,我们发现,墓志中存在不少疑难问题,如冒袭先祖以抬高身世;"尔朱雕阳王"史无记载,可能有误;贾进官职从"郎中令"跃升"车骑大将军",可能不实。

关键词：北齐墓志雕阳爵位

Reflections on COPD comorbidities

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Chinese Medical Journal 2024年第12期137卷 1504-1506页

作者： Zhenming He Yue Wang Lin Shan Yan Mou Yunhuan Liu guanhua Ma Yanxu Wu Huili Zhu Jeffrey L.Curtis Shilei cui Haiyan Ge Department of Pulmonary and Critical Care Medicine Huadong HospitalFudan UniversityShanghai 200040China Medical Service VA Ann Arbor Healthcare SystemAnn ArborMI 48105USA Pulmonary&Critical Care Medicine Division Department of Internal MedicineUniversity of MichiganAnn ArborMI 48109USA Graduate Program in Immunology University of MichiganAnn ArborMI 48109USA

To the Editor:Chronic obstructive pulmonary disease(COPD)is a common disease among the elderly,affecting over one-third of the elderly population *** progressive decline in lung function characteristic of COPD significantly impacts the quality of life and employability of affected individuals,resulting in a substantial direct and indirect socioeconomic *** frequently has comorbidities involving other organ *** all elderly COPD patients present with one or more comorbid conditions,collectively exacerbating health and economic *** viral and bacterial infections remain the most common triggers for COPD exacerbations(ECOPD).

关键词： morbid lung collective

当归饮子联合氯雷他定片治疗老年性皮肤瘙痒症临床观察

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中国中医药现代远程教育 2019年第20期17卷 103-105页

作者：崔关花崔敏孙永云隽会英云南省曲靖市第二人民医院中医科云南曲靖655000 云南省曲靖市麒麟区沿江乡卫生院中医科云南曲靖655008

目的观察当归饮子加减联合氯雷他定片治疗老年性皮肤瘙痒症(血虚风燥型)的临床疗效。方法将129例老年性皮肤瘙痒症患者随机分为对照组和治疗组,对照组仅口服氯雷他定片治疗,治疗组在口服氯雷他定片的同时口服当归饮子加减治疗,比较2组... 详细信息

目的观察当归饮子加减联合氯雷他定片治疗老年性皮肤瘙痒症(血虚风燥型)的临床疗效。方法将129例老年性皮肤瘙痒症患者随机分为对照组和治疗组,对照组仅口服氯雷他定片治疗,治疗组在口服氯雷他定片的同时口服当归饮子加减治疗,比较2组患者治疗4周后的治疗效果。结果治疗组总有效率高于对照组,差异有统计学意义(P<0.05)。结论当归饮子加减联合氯雷他定片能有效地治疗老年性皮肤瘙痒症(血虚风燥型),且临床使用安全,无明显不良反应。

关键词：当归饮子氯雷他定片老年科皮肤瘙痒症中西医结合疗法

大气^(14)CO_(2)的加速器质谱分析技术研究进展

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中国环境监测 2024年第2期40卷 41-52页

作者：崔晓宇邢冠华王超于建钊袁懋中国环境监测总站国家环境保护环境监测质量控制重点实验室北京100012 黑龙江省佳木斯生态环境监测中心黑龙江佳木斯154004

利用加速器质谱技术测定大气^(14)CO_(2)以示踪大气化石源CO_(2)成为当前减污降碳工作的热点。该文从加速器质谱14 C分析基础出发,系统介绍了加速器质谱的工作原理、大气样品的采集及纯化、石墨化样品的制备和测定,阐述了大气碳监测领域... 详细信息

利用加速器质谱技术测定大气^(14)CO_(2)以示踪大气化石源CO_(2)成为当前减污降碳工作的热点。该文从加速器质谱14 C分析基础出发,系统介绍了加速器质谱的工作原理、大气样品的采集及纯化、石墨化样品的制备和测定,阐述了大气碳监测领域^(14)CO_(2)测试的研究进展。随着加速器质谱技术的不断发展,大气^(14)CO_(2)的研究将会更加广泛和深入,有助于进一步认识大气化石源CO_(2)的来源,更有针对性地开展减污降碳工作。未来应统一制定^(14)CO_(2)监测方法标准,规范操作流程和质控手段,完善实验仪器配套设施,加快提升监测能力和水平。

关键词：加速器质谱 ^(14)CO_(2)分析技术研究进展

递增式连续降雨条件下典型山区坡面径流产沙水动力学特征

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农业工程学报 2024年第9期40卷 88-97页

作者：童晓霞崔远来邵东国李建明张冠华路良伟刘纪根武汉大学水资源工程与调度全国重点实验室武汉430072 长江水利委员会长江科学院武汉430010 水利部山洪地质灾害防治工程技术研究中心武汉430010 长江水利委员会水旱灾害防御创新团队武汉430010

山区复杂的下垫面条件导致了山区小流域水文响应过程的复杂性,山区坡面作为山区小流域水文响应的基本单元,研究其不同下垫面条件下径流产沙水动力特征具有重要意义。为明晰山区坡面不同下垫面条件下径流水沙水动力特征,该研究选用官山... 详细信息

山区复杂的下垫面条件导致了山区小流域水文响应过程的复杂性,山区坡面作为山区小流域水文响应的基本单元,研究其不同下垫面条件下径流产沙水动力特征具有重要意义。为明晰山区坡面不同下垫面条件下径流水沙水动力特征,该研究选用官山河小流域作为研究对象,基于室内模拟递增式连续降雨试验方法,研究了坡度、土层厚度分布和土层底部透水性等山区坡面下垫面特性共同作用下的坡面径流产沙水动力学特征。结果表明:1)连续降雨条件下,雷诺数、水流剪切力和径流功率随着产流时间和雨强增加呈现增加趋势,Darcy-Weisbach阻力系数呈降低趋势。2)雨强增加使雷诺数均值和径流功率均值显著增加(P<0.05),设计雨强60、90、120 mm/h时的雷诺数均值、径流功率均值分别比30 mm/h的雷诺数均值、径流功率均值增加了130%、276%、366%和171%、328%、435%;坡度增加使水流剪切力均值和径流功率均值显著增加(P<0.05),坡度15°、25°的水流剪切力均值分别比坡度5°的增加了135%和187%,坡度15°、25°的径流功率均值分别比坡度5°的均值增加了224%和357%;土层厚度分布对阻力系数均值和土层底部透水的雷诺数均值、径流功率均值有显著影响(P<0.05),土层底部透水性仅对土层厚度分布为上薄下厚的雷诺数均值和水流剪切力均值有显著影响(P<0.05)。3)雨强是影响坡面产流产沙水动力特征的主导因素,对雷诺数的方差贡献率高达83.11%,水流剪切力主要受到雨强和坡度的影响,累计贡献率达67.64%,径流功率主要受到雨强和坡度的影响,累计贡献率达80.58%。在单一雨强条件下,坡度和土层厚度分布是影响水动力参数的主要因素,土层厚度分布和坡度的交互作用、土层底部透水性和土层厚度分布的交互作用对水动力参数也有一定影响。因此,在研究坡面产流产沙规律时,除考虑雨强和坡度外,还应兼顾考虑土层厚度分布和土层底部透水性及其交互作用的影响。该研究结果可为山区坡面复杂下垫面条件下的坡面产流产沙机理提供一定的理论支撑,并为改进山区小流域水文过程分布式模拟提供参数率定依据。

关键词：降雨坡度侵蚀土层厚度分布土层底部透水性径流产沙水动力参数

Phase-boundary regulation boosting electrochemical reactivity of tin-based anodes for magnesium-ion batteries

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Science China Chemistry 2022年第7期65卷 1433-1444页

作者： Meijia Song Yan Wang Conghui Si Wenrun cui Wanfeng Yang guanhua Cheng Zhonghua Zhang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061China School of Materials Science and Engineering University of JinanJinan 250022China Shandong Provincial Key Laboratory of Processing and Testing Technology of Glass&Functional Ceramics School of Materials Science and EngineeringQilu University of Technology(Shandong Academy of Sciences)Jinan 250353China

Tin(Sn)-based materials are promising anodes for magnesium-ion batteries(MIBs) owing to their low reaction voltages, high theoretical specific capacities and good compatibility with conventional electrolytes. However, relatively arduous alloying reaction and sluggish diffusion kinetics limit their practical applications. Herein, we proposed a general strategy to regulate the electrochemical reactivity and performance of Sn-based anodes for Mg storage through the introduction of the second phase and phase boundary. The biphase Sn–Al, Sn–Pb and Sn–Zn O films were further fabricated via magnetron co-sputtering. Taking Sn–Al as an example, it has been revealed that the introduction of Al can effectively stimulate the electrochemical reaction of Sn with Mg in either nanoscale or bulk through combining experiments with density-functional theory calculations. Specially, the rolled Sn–Al electrode exhibits superior long-term stability over 5,000 cycles. Additionally, the Mg-storage mechanism of the Sn–Al electrode was investigated by operando X-ray diffraction. The Sn–Al anodes also demonstrate good compatibility with simple Mg-salt-based electrolytes like Mg(TFSI)2in full cells. More importantly, it has been authenticated that the activation effect of second phase and phase boundary to Sn is also applicable to Pb and Zn O. Our findings may provide a favorable reference for the development of alloy-type anodes for MIBs.

关键词： magnesium-ion batteries Sn-based anodes phase boundary magnetron sputtering density-functional theory calculation