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Phase transformation and thermal analysis during combustion synthesis of Mg_(17)Al_(12) alloy

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Rare Metals 2014年第1期33卷 37-40页

作者： Yu-Li Zhou yun Lu yun-Feng zhu Li-Quan Li College of Materials Science and Engineering Nanjing University of Technology

The Mg-A1 hydrogen storage alloy was suc- cessfully prepared by combustion synthesis （CS） method. The formation of alloy phases during the CS process was studied using X-ray diffraction （XRD）, scanning electron microscope （SEM）, and differential scanning calorimetry （DSC）. When the time increases from 0, 0.5, 1.0 to 2.0 h at 733 K, the products are Mg and A1; Mg2A13, Mg and A1; Mgl7All2, Mg2A13; and Mg; and eventually only MgI7A112, respectively. Combined with three peaks in the DSC traces, it is concluded that the formation of MglyAll2 during the CS includes three processes, namely, the formation of MgzA13 first; then the unsaturated solid solution, MglvAla2; and finally the complete MglvA112 alloy. The formation of MgzA13 prior to MglvA112 in this work is different from those prepared by mechanical alloying. This is thought to be related to the instant high temperature during the ther- mal explosion of CS.

关键词： Mg-A1 alloy Combustion synthesis Phasetransformation Thermal analysis

Recollecting Ruins： Republican Nanjing and Layered Nostalgia in Bai Xianyong＇s Taipei People and Ye Zhaoyan＇s Naniing 1937： A Love Story

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Frontiers of Literary Studies in China-Selected Publications from Chinese Universities 2017年第2期11卷 375-397页

作者： yun zhu College of Liberal Arts Department of Asian and Middle Eastern Languages and StudiesTemple University Philadelphia PA 19122 USA

This paper examines the layered nostalgia embodied by one specific spatiotemporal site, the war-torn Republican capital of Nanjing, in Bai Xianyong＇s 1971 collection of short stories Taipei People and in Ye Zhaoyan＇s 1996 novel Nanjing 1937： A Love Story. Both Nanjing＇s historical reputation as an ancient capital for several short-lived dynasties and its special role in narrating Chinese identity and cultural traditions across the 1949 divide contribute to the city＇s symbolic significance in the literary tradition of ruin gazing. In the two texts under discussion, the layered ruins of Republican Nanjing--reminiscent of the decadent Six Dynasties （220-589） and witnessing the historical violence and physical as well as metaphorical dislocation resulting from World War II and the Chinese Civil War--constitute an ideal site for reflecting upon not only personal and national traumas but also traditional-modern tensions from diversified stances and angles. The related but divergent trajectories taken by Bai＇s and Ye＇s nostalgic gaze--one projected from the United States in the 196os by way of post-1949 Taipei and the other geographically located in contemporary Nanjing but culturally distanced from it--form an interesting dialogue, which may shed light on the fluidity of ruin gazing at a nexus of identity questions with reference to the embrace of modernity.

关键词： Bai Xianyong Taipei People Ye Zhaoyan Nanjing 1937 nostalgia,Republican Nanjing ruins

Herb-induced Liver Injury in Asia and Current Role of RUCAM for Causality Assessment in 11,160 Published Cases

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Journal of Clinical and Translational Hepatology 2020年第2期8卷 200-214页

作者： Rolf Teschke yun zhu Jing Jing Department of Internal Medicine II Division of Gastroenterology and HepatologyKlinikum HanauHanauAcademic Teaching Hospital of the Medical FacultyGoethe University Frankfurt/MainFrankfurt/MainGermany The Fifth Medical Center General Hospital of PLABeijingChina

Herb-induced liver injuries (HILI) by traditional herbal medi-cines are particular challenges in Asian countries, with issues over the best approach to establish causality. The aim of the current analysis was to provide an overview on how causality was assessed in HILI cases from Asian countries and whether the Roussel Uclaf Causality Assessment Method (RUCAM) was the preferred diagnostic algorithm, as shown before in world-wide evaluated cases of drug-induced liver injury (DILI). Using the PubMed database, publications in English language were preferred to allow for reevaluation by peers. Overall 11,160 HILI cases have assessed causality using RUCAM and were published by first authors working in Asian countries. With 21 evaluable reports, most publications came from China's Mainland, with Hong Kong and Taiwan, followed by Korea (n=15), Singapore (n=2), and Japan (n=1), while other Asian countries were not contributory. Most publications provided case and RUCAM data of good quality. For better presentation of future cases, how-ever, the following recommendations are given:(1) preference of prospective study design with use of the updated RUCAM version;(2) clear separation of HILI cohorts from those of other herbal products or DILI;(3) case series for epidemiology stud-ies should contain many essential data, possibly also as supple-mentary material;(4) otherwise, preference of single case reports providing individual case data and RUCAM-based cau-sality gradings, and applying liver test threshold values;and (5) publication in English language journals. In conclusion, China and Korea are top in presenting RUCAM-based HILI cases, other Asian countries are encouraged to follow.

关键词： Liver injury Drug induced liver injury Herb induced liver injury RUCAM

Performance evaluation of a micro turbo-expander for application in low-temperature solar electricity generation

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第3期12卷 207-213页

作者： Gang PEI yun-zhu LI Jing LI Jie JI Department of Thermal Science and Energy Engineering University of Science and Technology of China Hefei 230026 China

A micro turbo-expander capable of high working speed was specially manufactured for use in an organic Rankine cycle (ORC).A series of tests were executed to examine the performance of the *** the experiment,the machine was tested under different inlet pressure conditions (0.2-0.5 MPa).Data such as the compressed air pressure,temperatures of the inlet and the outlet,rotational speed,and electric power generation were analyzed to discover underlying *** the test,the rotational speed of the machine reached as high as 54 000 r/min,the peak value of the temperature drop between the inlet and the outlet reached 42 ℃,the maximum electric power generated by the motor-generator attached to the machine reached 630 W,and the efficiency of the machine reached 0.43.

关键词： Turbo-expander Solar Low-temperature Performance evaluation

Performance analysis and application on Ti-6Al-4V of micro-forging system

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Chinese Journal of Aeronautics 2021年第6期34卷 188-198页

作者： Yufei GUI Qi LIU yun zhu Sulin CHEN Bin SHEN School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Micro-forging(MF)is a novel surface modification technology which is capable of smoothening and strengthening the workpiece surface *** on analysis of the mechanism and energy conversion of micro-forging process,an electromagnetically driven microforging system is *** further grasp the kinetic characteristic of the equipment,a simulation model is established and its accuracy is *** the help of simulation and experimental results,we propose an input voltage optimization method,which drives the micro-forging head moving in a uniform and stable *** this study,the influence of MF on surface integrity of Ti-6 Al-4 V(TC4)is firstly *** results show that MF treatment reduces surface roughness(Ra)and increases micro-hardness by 48%and 11.8%at most,***,a compressive stress layer with an amplitude of-1000 MPa and a depth of 0.8 mm is *** study analyzes the performance and reveals the potential of micro-forging technology,which lays a solid foundation for expanding its application in TC4 surface modification.

关键词： Input voltage Micro-forging system Performance analysis Surface integrity Titanium alloy

Preference of Chaotic Synchronization in a Coupled Laser System

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Communications in Theoretical Physics 2005年第6X期44卷 1076-1080页

作者： ZHOU yun zhu Shi-Qun WU Liang School of Physical Science and Technology Suzhou University Suzhou 215006 China

In a coupled laser system, the dynamics of the receiving laser is investigated when two separate transmitting lasers are injected into the receiving laser with different coupling strengths. It is shown that the phenomenon of preference of chaotic synchronization appears under appropriate coupling conditions. The receiving laser will entrain the pulses of either one or both transmitting lasers when the coupling is strong while it keeps its own dynamics when the coupling is weak.

关键词： coupled laser system dynamics preference of chaotic synchronization

Crystal structure of kindlin-2 PH domain reveals a conformational transition for its membrane anchoring and regulation of integrin activation

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Protein & Cell 2012年第6期3卷 434-440页

作者： Yan Liu yun zhu Sheng Ye Rongguang Zhang National Laboratory of Biophysics Institute of BiophysicsChinese Academy of SciencesBeijing 100101China

Kindlin-2 belongs to a subfamily of FERM domain con-taining proteins,which plays key roles in activating integrin transmembrane receptors and mediating cell *** to conventional FERM domains,kindlin-2 FERM contains an inserted pleckstrin homology(PH)domain that specifically binds to phosphatidy-linositol(3,4,5)trisphosphate(PIP3)and regulates the kindlin-2 *** have determined the crystal struc-ture of kindlin-2 PH domain at 1.9Åresolution,which reveals a conserved PH domain fold with a highly charged and open binding pocket for PIP3 head *** comparison with a previously reported solution structure of kindlin-2 PH domain bound to PIP3 head group reveals that upon PIP3 insertion,there is a significant conformational change of both the highly positively charged loop at the entry of the PIP3 binding pocket and the entireβbarrel of the PH *** propose that such“induced-fit”type change is crucial for the tight binding of PIP3 to anchor kindlin-2 onto the membrane surface,thereby promoting its binding to *** results provide important structural insight into kindlin-2-mediated membrane anchoring and integrin activation.

关键词： kindlin-2 integrin PH domain crystal structure cell adhesion membrane

Quasi Sure Large Deviation for Increments of Fractional Brownian Motion in H¨older Norm

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Acta Mathematica Sinica,English Series 2015年第6期31卷 913-920页

作者： Jie XU yun Min zhu Ji Cheng LIU College of Mathematics and Information Science He'nan Normal University College of Mathematics Sichuan University School of Mathematics and Statistics Huazhong University of Science and Technology

In this paper, we first prove Schilder＇s theorem in H？lder norm （0 ≤ α 〈1） with respect to Cr,p-capacity. Then, based on this result, we further prove a sharpening of large deviation principle for increments of... 详细信息

关键词： Schilder's theorem large deviations fractional Brownian motion Cr,p-capacity

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渗透氢对BCC金属裂纹扩展行为的影响

原子与分子物理学报 2025年第4期42卷 45-52页

作者：朱云蝶赵可可张吉鼎江晓禹西南交通大学力学与航空航天学院成都611756

在氢环境下,氢原子会吸附在金属材料表面.随着时间推移,氢原子会渗透进入金属内部占据空隙位置.氢原子的聚集会导致应力集中,最终进一步影响材料的力学行为.本文通过分子动力学方法研究氢在裂纹尖端行为的力学响应.研究结果表明,裂纹尖... 详细信息

在氢环境下,氢原子会吸附在金属材料表面.随着时间推移,氢原子会渗透进入金属内部占据空隙位置.氢原子的聚集会导致应力集中,最终进一步影响材料的力学行为.本文通过分子动力学方法研究氢在裂纹尖端行为的力学响应.研究结果表明,裂纹尖端吸附的氢降低了原子间的键合力,导致局部应力集中所需的临界外加载荷减小;使得材料在较低的断裂强度条件下发生破坏,并在很大程度上促进了裂纹的扩展.模拟观察到在外加载荷下吸附氢在裂纹尖端的渗透过程,氢原子会聚集在高应力区域,造成材料塑性降低.另外,渗透进材料的氢原子数目会随着计算时间的增加达到一个最大临界值.当施加应变增大,裂纹尖端渗透氢原子数最大临界值和达到临界值的时间会增加.

关键词：分子动力学裂纹扩展氢渗透塑性损失