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Synthesis of a ternary amide LixKy（NH2）x+y and a novel Li3K（NH2）4–xMgH2 combination system for hydrogen storage

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Journal of Energy Chemistry 2019年第8期28卷 37-43,I0002页

作者： Chao Li Changlong Li Meiqiang Fan Haichao Chen kangying shu Yu Zhang Mingxia Gao Yongfeng Liu Hongge Pan College of Materials Science and Engineering China Jiliang UniversityHangzhou 310018 Zhejiang China State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027 Zhejiang China School of Materials Science and Engineering Hubei University of Automotive TechnologyShiyan 442002 Hubei China

The ternary amides LiK2(NH2)3, LiK(NH2)2, and Li3 K(NH2)4 are successfully synthesized by ball milling mixtures of LiNH2 and KNH2, and the hydrogen storage properties of Li3K(NH2)4–xMgH2(x = 1, 2, 3,4) are systematically investigated. The Li3K(NH2)4–2 Mg H2 sample displays optimized hydrogen storage properties, releasing 6.37 wt% of hydrogen in a two-stage reaction with an onset temperature of 60 °C.The first dehydrogenation stage exhibits good reaction kinetics and thermodynamic properties because of a lower activation energy and appropriate enthalpy change. After full dehydrogenation at 130 °C, the Li3K(NH2)4–2 MgH2 sample absorbs 3.80 wt% of H2 below 160 °C in a variable temperature hydrogenation mode. Mechanistic investigations indicate that Li3 K(NH2)4 reacts with Mg H2 to produce Mg(NH2)2, LiH,and KH during ball milling. In the heating process, Mg(NH2)2 first reacts with Li H to form Li2 Mg2 N3 H3 and Li NH2, while KH works as a catalyst, and then, KH reacts with Li2Mg2N3H3 and Li NH2 to generate a new K-containing compound.

关键词： Hydrogen storage Complex hydrides Amides Reversibility Reaction mechanisms

城市商业银行设立对资本要素市场整合的影响:促进还是抑制?--基于准自然实验的分析

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财经论丛 2024年第6期 46-56页

作者：乔俊峰尹星怡刘康颖河南师范大学商学院河南新乡453007

以城市商业银行的设立为准自然实验,基于1998—2013年中国地级市数据与中国工业企业数据库数据,运用渐进双重差分方法系统考察了地方金融发展对资本要素市场整合的影响。研究表明,城商行的设立显著促进了资本要素市场整合。机制分析表明... 详细信息

以城市商业银行的设立为准自然实验,基于1998—2013年中国地级市数据与中国工业企业数据库数据,运用渐进双重差分方法系统考察了地方金融发展对资本要素市场整合的影响。研究表明,城商行的设立显著促进了资本要素市场整合。机制分析表明,城商行的设立通过促进银行业竞争和增加信贷供给推动资本要素市场整合,而政府干预会在一定程度上削弱促进银行业竞争的效应,影响信贷资源流向。对城商行异地扩张和兼并的进一步分析表明,城商行的异地分行设立会促进地区资本要素市场整合,但城商行异地分行数量的扩张又会阻碍资本要素市场整合,而城商行兼并对资本要素市场整合则没有起到显著的促进作用。本文研究结论能为我国优化地方金融体系,促进资本要素市场整合提供理论依据和直观证据。

关键词：城市商业银行资本要素市场整合渐进双重差分法

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涉林类犯罪恢复性司法适用研究

黑龙江环境通报 2024年第5期37卷 138-140页

作者：王康莹浙江农林大学杭州311399

本文主要在恢复性司法的视野下,根据近年来生态实践中“复植补绿”的做法,通过规范研究、比较研究等方法研究盗伐、滥伐林木犯罪适用恢复性司法在实践中出现的问题,发现适用中存在对恢复性司法认识不足和法律制度不健全的困境,对于涉林... 详细信息

本文主要在恢复性司法的视野下,根据近年来生态实践中“复植补绿”的做法,通过规范研究、比较研究等方法研究盗伐、滥伐林木犯罪适用恢复性司法在实践中出现的问题,发现适用中存在对恢复性司法认识不足和法律制度不健全的困境,对于涉林类犯罪案件中适用恢复性司法理念给予肯定,提出通过立法将恢复性司法措施作为一种非刑罚处罚方式在量刑时予以考量,明晰恢复性司法程序与普通程序的关系,同时规范恢复性措施的标准和监督确保在实践中准确适用。

关键词：恢复性司法森林资源犯罪机制完善

白芷在神经病理性疼痛中对MrgprD-TRPA1通路的调控作用分析

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中国实验动物学报 2024年第2期32卷 219-229页

作者：顾乐盈杨妞妞于康英孟雅琴宋绍征无锡太湖学院健康与护理学院基础医学系江苏无锡214000 扬州大学医学院江苏扬州225009

目的本研究拟通过建立坐骨神经慢性缩窄损伤(chronic constriction injury,CCI)小鼠模型,分析和探讨白芷在神经病理性疼痛中的镇痛效果及其对MrgprD-TRPA1信号通路的调控作用。方法无菌外科手术结扎缠绕30只小鼠坐骨神经制备CCI小鼠模型... 详细信息

目的本研究拟通过建立坐骨神经慢性缩窄损伤(chronic constriction injury,CCI)小鼠模型,分析和探讨白芷在神经病理性疼痛中的镇痛效果及其对MrgprD-TRPA1信号通路的调控作用。方法无菌外科手术结扎缠绕30只小鼠坐骨神经制备CCI小鼠模型;VonFrey实验检测白芷对小鼠机械刺激疼痛行为学变化,热辐射实验评估白芷对小鼠热痛觉过敏情况;Western Blot、免疫荧光、RT-PCR检测白芷对小鼠MrgprD和TRPA1蛋白表达水平、DRG阳性神经元数量、MrgprD和TRPA1 mRNA水平的影响;通过对HEK293细胞分别单转染和共转染MrgprD、TRPA1质粒后的钙成像实验,分析荧光信号强度差异性。结果共成功制备了25只CCI小鼠模型,造模率达到83.33%(25/30);白芷灌胃的CCI小鼠机械性阈值和缩足潜伏时间均显著大于对照组(P<0.05);白芷灌胃的CCI小鼠中MrgprD和TRPA1蛋白表达水平均显著低于对照组(P<0.05);白芷灌胃的CCI小鼠DRG中MrgprD和TRPA1阳性神经元的数量显著低于对照组(P<0.05);白芷灌胃的CCI小鼠中MrgprD和TRPA1 mRNA相对表达水平均显著低于对照组(P<0.05);共转染MrgprD和TRPA1质粒的HEK293细胞中荧光强度显著高于单转染和对照组(P<0.05)。结论本研究通过探究白芷在CCI小鼠模型中镇痛的效果,证明了MrgprD-TRPA1是神经病理性疼痛的重要作用靶点,揭示了白芷可以通过调控MrgprD-TRPA1信号转导通路来抑制神经病理性疼痛程度,这为后续开发新型临床镇痛药物及镇痛机制的深入研究奠定了基础。

关键词：小鼠白芷神经病理性疼痛 MrgprD TRPA1

基于激光SLAM的物流分拣机器人自主导航研究

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激光杂志 2024年第5期45卷 236-240页

作者：王力锋刘抗英姚源果周万洋百色学院广西百色533000

物流分拣机器人工作环境的障碍物多,为此提出基于激光SLAM的物流分拣机器人自主导航研究方法。利用激光SLAM确定机器人工作环境中障碍物的分布情况;将目标偏置策略加入到RRT*算法中,通过设置固定概率和变概率的目标偏置策略,在遍历目标... 详细信息

物流分拣机器人工作环境的障碍物多,为此提出基于激光SLAM的物流分拣机器人自主导航研究方法。利用激光SLAM确定机器人工作环境中障碍物的分布情况;将目标偏置策略加入到RRT*算法中,通过设置固定概率和变概率的目标偏置策略,在遍历目标点时使路径节点更具导向性,更好地避免机器人与障碍物发生碰撞,再利用搜索随机树搜索其中的最短路径。对比实验表明:与常规方法相比,该方法可在起始点与目标点之间指导机器人按照最短路径行进,导航过程花费时间较短,使机器人自主导航的出错率和能耗均在5%左右。

关键词：激光同步定位与地图构建机器人自主导航 G-RRT*算法目标偏置策略随机树

Controllable synthesis of well-ordered TiO_2 nanotubes in a mixed organic electrolyte for high-efficiency photocatalysis

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Science China Chemistry 2012年第11期55卷 2373-2380页

作者： WANG Chao CHEN Da PING GuangXing LIU shu HUANG XiaNi HUANG YueXiang shu kangying LI JingHong College of Materials Science&Engineering China Jiliang UniversityHangzhou 310018China Beijing Key Laboratory for Microanalytical Methods and Instrumentation Department of ChemistryTsinghua UniversityBeijing 100084China

Well-ordered TiO 2 nanotube arrays (TNAs) were fabricated by electrochemical anodization in a mixed organic electrolyte consisting of ethylene glycol and glycerol. The morphology, structure, crystalline phase, and photocatalytic properties of TNAs were characterized by using TEM, SEM, XRD and photodegradation of methylene blue. It was found that the morphology and structure of TNAs could be significantly influenced by the anodization time and applied voltage. The obtained tube length was found to be proportional to anodization time, and the calculated growth rate of nanotubes was 0.6 m/h. The microstructure analysis demonstrated that the diameter and thickness of the nanotubes increased with the increase of anodization voltage. The growth mechanism of TNAs was also proposed according to the observed relationship between current density and time during anodization. As expected, the obtained TNAs showed a higher photocatalytic activity than the commercial TiO 2 P25 nanoparticles.

关键词：二氧化钛纳米管光催化性能有机电解质混合有序透射电子显微镜阳极氧化技术需求

Effect of substitution of Si by Al on the microstructure and mechanical properties of bainitic transformation-induced plasticity steels

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Journal of Materials Science & Technology 2017年第12期33卷 1475-1486页

作者： kangying Zhu Coralie Mager Mingxin Huang R&D ArcelorMittal Maizieres BP 30320 57283 Maizieres-les-Metz Cedex France Department of Mechanical Engineering The University of Hong Kong Hong Kong China

The effect of partial or full substitution of Si by Al on the microstructure and mechanical properties has been extensively studied in multi-phase transformation-induced plasticity（TRIP） steels with polygonal ferrite matrix, but rarely studied in bainitic TRIP steels. The aim of the present study is to properly investigate the effect of Al and Si on bainite transformation, microstructure and mechanical properties in bainitic steels in order to provide guidelines for the alloying design as a function of process parameters for the 3 rd generation advanced high strength steels（AHSS）. It is shown from the dilatometry study,microstructural investigations and tensile properties measurements that the Al addition results in an acceleration whereas Si addition leads to a retardation in bainite transformation kinetics. The addition of Al retards the decomposition of austenite into pearlite and carbides at holding temperatures higher than450℃ whereas Si retards the decomposition of austenite into carbides at temperatures lower than 450℃.Consequently, the Al-added bainitic steel has a better strength-elongation combination at bainitic holding temperatures higher than 450℃ while Si-added steel has a better strength-elongation combination at temperatures lower than 450℃. The higher yield strength of Al-added steel is mainly attributed to its finer bainitic lath. The higher tensile strength of Si-added steel is not only related to the stronger contribution of Si on work hardening during deformation, but also due to the higher volume fraction of martensite or martensite/austenite（MA） blocks in all heat treatment conditions, as well as the lower mechanical stability of retained austenite in this steel.

关键词： TRIP steel Bainite transformation kinetics Carbide free bainite Mechanical properties AHSS

嵌段共聚物与接枝纳米粒子在硬受限下的自组装

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山西师范大学学报（自然科学版） 2024年第1期38卷 54-58页

作者：蔚慧敏王阳王康颖张海涛潘俊星张进军山西师范大学物理与信息工程学院山西太原030031

采用自洽场方法(SCFT),研究了两嵌段共聚物与接枝均聚物纳米粒子在硬受限下的自组装行为,详细探讨了板的性质与受限程度对体系相行为的影响,结果发现随着受限程度和板性质的变化,体系发生了多次结构转变.当AB两嵌段共聚物对称(f_(a)=f_(... 详细信息

采用自洽场方法(SCFT),研究了两嵌段共聚物与接枝均聚物纳米粒子在硬受限下的自组装行为,详细探讨了板的性质与受限程度对体系相行为的影响,结果发现随着受限程度和板性质的变化,体系发生了多次结构转变.当AB两嵌段共聚物对称(f_(a)=f_(b)=0.5)时,在体系受限较小(70≤N2≤120)情况下,无论板的性质如何变化,体系均会形成波浪层状和平行层状混合结构.当受限程度增大(40≤N2≤60)时,在中性板中,体系会自组装形成同心圆环结构;在A吸引板中,体系会形成柱状结构和平行层状混合结构;在B吸引板中,体系会自组装形成带状、层状以及同心圆环混合结构.当受限程度较大(20≤N2≤30)时,在中性板和A吸引板中,体系最终转变为垂直层状结构;在B吸引板中,体系自组装形成平行层状结构.最后,还探讨了熵效应对体系结构形成的影响.

关键词：嵌段共聚物纳米粒子硬受限自洽场方法

Therapeutic potential of gasotransmitters for cold stress-related cardiovascular disease

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Frigid Zone Medicine 2022年第1期2卷 10-24页

作者： Haijian Sun Xiaowei Nie kangying Yu Jinsong Bian School of Traditional Chinese Pharmacy China Pharmaceutical UniversityNanjing 211198China Shenzhen Key Laboratory of Respiratory Diseases Shenzhen People’s Hospital(The First Affiliated HospitalSouthern University of Science and Technology)Shenzhen 518055China Nursing School of Wuxi Taihu University Wuxi 214064China Department of Pharmacology School of MedicineSouthern University of Science and TechnologyShenzhen 518055China National University of Singapore(Suzhou)Research Institute Suzhou 215000China

Growing evidence has shown that exposure to low ambient temperature poses a huge challenge to human health globally.Actually,cold stress is closely associated with a higher incidence of cardiovascular morbidity and mortality in winter or in cold regions.Cellular and molecular mechanisms underlying cardiovascular complications in response to cold exposure have yet to be fully clarified.Considering that cold exposure is an important risk of cardiovascular complications,it is necessary to clarify the molecular mechanism of cold stress-induced cardiovascular diseases and to develop effective intervention strategies.Hydrogen sulfide(H2S),nitric oxide(NO),and carbon monoxide(CO)are well-known gasotransmitters that are endogenously produced in many biological systems.Accumulating studies have demonstrated that these gasotransmitters play a critical role in a wide spectrum of physiological and/or pathophysiological processes by regulating numerous signaling pathways.These gas signal molecules are emerging as important players in cardiovascular homeostasis,and disruption of these gasotransmitters is critically implicated in cardiovascular anomalies,such as hypertension,atherosclerosis,myocardial ischemia,heart failure,and stroke.Also,evidence is emerging that H2S,NO,and CO may be involved in the pathologies of cold stress-induced cardiovascular ailments.In this review,we aim to highlight and discuss the recent advances towards the development of gasotransmitters-based therapeutics for cold stress-related cardiovascular pathogenesis.We believe that the effects of H2S,NO,and CO on cardiovascular regulation under cold environment will attract tremendous interest in the near future as they serve as novel regulators of cardiovascular biology in cold environment.

关键词： cold stress cardiovascular diseases hydrogen sulfide nitric oxide carbon monoxide