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Acta Metallurgica Sinica(english Letters) 2014年第3期27卷 395-400页

作者： Jiecen Zhang yu Cao Guangwei jiang Hongshuang Di State Key Laboratory of Rolling and Automation Northeastern University Benxi Iron and Steel Co. Ltd

By using transmission electron microscopy and electron back-scattered diffraction, the effect of annealing temperature on the precipitation behavior and texture evolution in a warm-rolled interstitial-free high strength steel was studied. The results indicated that fine FeTiP could precipitate at 650 ℃, and the number of those precipitates increased greatly with the increasing annealing temperature until 800 ℃. Furthermore, the nucleation of FeTiP was influenced by the precipitation of TiC and （Ti, Nb） C. The near absence of FeTiP and a large volume fraction of TiC and （Ti, Nb） C in matrix are envisaged to be primarily responsible for the sharp y-fiber texture. As the boundary pinning effect caused by FeTiP is weak and there are less interstitial C atoms in matrix. Thus, annealing at 800 ℃ leads to the highest intensity of y-fiber texture.

关键词： Interstitial-free high strength (IFHS) Annealing temperature Precipitate Texture

Rapid synthesis and growth of silver nanowires induced by vanadium trioxide particles

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Particuology 2013年第4期11卷 428-440页

作者： Haitao Fu Xiaohong Yang Aibing yu Xuchuan jiang School of Materials Science and engineering The University of New South Wales

This study demonstrates a novel approach for rapid synthesis of silver （Ag） nanowires induced by vana- dium trioxide （V2O3） particles in aqueous solution at room temperature. Silver nanowires have an average diameter of 20 nm and length up to a few micrometers by parametric optimization. The micro- structure of the silver nanowires was characterized by TEM, HRTEM, SEM, and XRD techniques. The optical property of the as-prepared product was measured by ultraviolet-visible （UV-vis） spectroscopy. The possible growth mechanism of Ag nanowires via oriented attachment of Ag nanocrystals was dis- cussed. The present approach shows several unique features such as rapid （a few minutes）, reproducible and high-yield reaction with no need of any modifiers. V2O3 rods were reported for the first time to be used for synthesis of silver nanowires, playing multiple roles as reducing agent, template, and cata- lyst. The silver nanowires produced are promising for optical applications （e.g., SERS） due to their rough surface.

关键词： Ag nanowiresOriented attachmentVanadium trioxide particlesRoom-temperature synthesis

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数据库管理系统模糊测试技术研究综述

软件学报 2025年第1期36卷 399-423页

作者：梁杰吴志镛符景洲朱娟姜宇孙家广清华大学软件学院湖北文理学院物理与电子工程学院

数据库管理系统(DBMS)是用于高效存储、管理、分析数据的基础软件,在现代数据密集型应用中起着举足轻重的作用.数据库管理系统中存在的漏洞则对数据的安全性和应用的正常运行造成巨大威胁.模糊测试是当前最为流行的动态漏洞检测技术之一... 详细信息

数据库管理系统(DBMS)是用于高效存储、管理、分析数据的基础软件,在现代数据密集型应用中起着举足轻重的作用.数据库管理系统中存在的漏洞则对数据的安全性和应用的正常运行造成巨大威胁.模糊测试是当前最为流行的动态漏洞检测技术之一,它已经被应用于分析DBMS,并发现许多漏洞.分析DBMS的测试需求和难点,提出对DBMS进行模糊测试的一般框架,同时分析DBMS模糊测试工具面临的挑战和需要支持的维度;接着从挖掘不同类型漏洞的角度介绍典型的DBMS模糊测试工具;然后总结包括SQL表达式合成、代码覆盖追踪、测试准则构建在内的DBMS模糊测试的关键技术.接着就测试的覆盖率,生成测试用例的语法语义正确性和漏洞的发现能力对当前的几个流行模糊测试工具进行评估.最后,讨论当前DBMS模糊测试技术研究和实践中面临的问题,并对未来的研究方向进行展望.

关键词：数据库管理系统模糊测试漏洞挖掘

Preparation of nano-porous AlN micro-rods

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Science China(Technological Sciences) 2012年第6期55卷 1523-1526页

作者： YAN GuoJun LIU XiaoLi CHen GuangDe jiang BaiLing LI Feng LIU HanCh-en School of Material Science and engineering Xi'an University of TechnologyXi'an 710048China Department of Applied Physics Xi'an Jiaotong UniversityXi'an 710049China Department of Physics Xi'an Polytechnic UniversityXi'an 710048China

In this paper, nano-porous A1N micro-rods were prepared and characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, Brunauer-Emett-Teller （BET） method of nitrogen adsorption at low temperature, UV-via absorption spectrometry and Raman spectrometry. The SEM images and TEM images showed that the A1N samples were micro-size rods with pores in their surfaces evenly. The length of the rod was in the range of a few mi- crons to tens of micron, the diameter of the rods was about one micron, the diameter of the pore was about hundreds of nano- meter and the wall thickness of the pore about tens of nanometer. The BET surface area of the sample was 41.424 ma/g. The optical spectra showed that the optical properties of the A1N samples almost agreed with that of A1N bulk or film.

关键词： porous AIN micro-rods preparation

Effect of trace Zn addition on electromigration of Cu/Sn-10Bi/Cu solder joints

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Journal of Iron and Steel Research International 2024年第10期31卷 2568-2576页

作者： Jia-yu Zhang Feng-jiang Wang Yan-xin Qiao School of Materials Science and engineering Jiangsu University of Science and TechnologyZhenjiang212000JiangsuChina

The electromigration reliability on Sn–10Bi solder joints is investigated and the performance is tried to be improved with trace Zn addition in solder by depressing the growth of interfacial intermetallic compounds(IMCs)under *** electromigration test was realized on Cu/solder/Cu linear specimens at a current density of 1.0×10^(4) A/cm^(2) with different stressing *** was found that Bi atoms in Cu/Sn-10Bi/Cu solder joint were driven towards anode side under current driving force and then accumulated at anode interface with current stressing time *** thickness and growth rate of Cu_(6)Sn_(5) IMCs at anode interface were obviously larger than those at cathode side due to polarity *** addition of 0.2 wt.%Zn inhibited the migration of Bi atoms during the electromigration process,and the composition of interfacial IMCs was transformed into Cu_(6)(Sn,Zn)_(5),which played as a diffusion barrier to effectively reduce the asymmetric growth of IMCs and the consumption of Cu substrate during electromigation.

关键词： Electromigration Atomic migration Zn addition Sn–Bi solder Intermetallic compound

Recent progress of composite solid polymer electrolytes for all-solid-state lithium metal batteries

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Chinese Chemical Letters 2021年第9期32卷 2659-2678页

作者： Qingjiang yu Kecheng jiang Cuiling yu Xianjin Chen Chuanjian Zhang Yi Yao Bin jiang Huijin Long jiangsu TAFEL New energy Technology Co. Ltd.Nanjing 211106China School of Physics Harbin Institute of TechnologyHarbin 150001China

In comparison with lithium-ion batteries(LIBs)with liquid electrolytes,all-solid-state lithium batteries(ASSLBs)have been considered as promising systems for future energy storage due to their safety and high energy *** the pivotal component used in ASSLBs,composite solid polymer electrolytes(CSPEs),derived from the incorporation of inorganic fillers into solid polymer electrolytes(SPEs),exhibit higher ionic conductivity,better mechanical strength,and superior thermal/electrochemical stability compared to the single-component SPEs,which can significantly promote the electrochemical performance of ***,the recent advances of CSPEs applied in ASSLBs are *** effects of the category,morphology and concentration of inorganic fillers on the ionic conductivity,mechanical strength,electrochemical window,interfacial stability and possible Li+transfer mechanism of CSPEs will be systematically ***,the challenges and perspectives are proposed for the future development of high-performance CSPEs and ASSLBs.

关键词： Composite solid polymer electrolyte All-solid-state lithium battery Ionic conductivity Li+transport Electrochemical property

Polaron-pair-dependent equivalent circuit parameters of organic solar cells based on CuPc and C_(60)

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Chinese Science Bulletin 2010年第13期55卷 1317-1324页

作者： HUANG jiang yu JunSheng LIN Hui jiang YaDong State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Information University of Electronic Scienceand Technology of China (UESTC) Chengdu 610054 China

We present the current-voltage characteristics of organic solar cells based on single and double heterojunction of copper phthalocyanine (CuPc) and C60 by introducing a constant JP instead of photo-current density Jph to represent the density of polaron-pairs generated from excitons at D/A interface. A diode Dext models polaron-pair dissociation, and a diode Drec stands for loss due to polaron-pair recombination. The photovoltaic response under AM 1.5 solar illumination at an intensity of 100 mW/cm2 is parameterized and modeled using the improved equivalent circuit model developed for inorganic pn-junction solar cells. The instinct mechanisms including dissociation, recombination of polaron-pairs and charge carrier collection process are explained by introducing Jph/JP as the dissociation rate of polaron-pairs and |J|/Jph as charge carrier application efficiency ηCA. Especially, we reveal the optimization mechanism for the fill factor FF and series resistance RS of organic solar cells.

关键词：有机太阳能电池极化子等效电路参数 C60 酞菁铜电流电压特性等效电路模型电流密度

Hydrogen-assisted fracture features of a high strength ferrite-pearlite steel

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Journal of Materials Science & Technology 2019年第6期35卷 1081-1087页

作者： yuefengjiang Bo Zhang Dongying Wang yu Zhou Jianqiu Wang en-Hou Han Wei Ke CAS Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China School of Materials Science and engineering University of Science and Technology of China Shenyang 110016 China Shenyang Blower Works Group Corporation Shenyang 110869 China

Up to now, the exact reason of hydrogen-induced fracture for ferrite-pearlite(FP) steel is still not fully understood. This study presents detail observations of the feature beneath the fracture surface with the aim to reveal the hydrogen-induced cracking initiation and propagation processes. Slow strain rate tensile(SSRT) testing shows that the FP steel is sensitive to hydrogen embrittlement(HE). Focused ion beam(FIB)was used to prepare samples for TEM observations after HE fracture. The corresponding fractographic morphologies of hydrogen charged specimen exhibit intergranular(IG) and quasi-cleavage(QC) fracture feature. Pearlite colony, ferrite/pearlite(F/P) boundary and the adjacent ferrite matrix are found to be responsible for the initial HE fracture and the subsequent propagation. With increasing of the stress intensity factor, fracture mode is found to change from mixed IG and QC to entire QC feature which only occurs at the ferrite matrix. No crack is observed at the ferrite/cementite(F/C) interface. This may be mainly due to the limited pearlite lamella size and relatively low interface energy.

关键词： Ferrite-pearlite steel TEM Fracture Hydrogen embrittlement

Reliability analysis of carbon fiber rod-reinforced umbilical cable under tension using an improved sampling method

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Petroleum Science 2024年第4期21卷 2769-2778页

作者： yu Zhang Hong-yu Zhang Ran Xia Si-Ao jiang Fang Wang College of Safety and Ocean engineering China University of PetroleumBeijing102249China China Academy of Aerospace Aerodynamics China Aerospace Science and Technology GroupBeijing100094China College of engineering Science and Technology Shanghai Ocean UniversityShanghai201306China

The umbilical cable is a vital component of subsea production systems that provide power,chemical agents,control signals et al.,and its requirement for reliability is exceedingly ***,as the umbilical cable is a composite structure comprising multiple functional units,the reliability analysis of such cables involves numerous parameters that can impact calculation *** this paper,the reliability analysis of a new kind of umbilical cable with carbon fiber rod under tension is *** global dynamic analytical model is first established to determine the maximum tension load,then the local analytical model of umbilical cable including each unit are constructed by finite element method(FEM).Based on the mechanical analytical model,the reliability of umbilical cable under tension load is studied using response surface method(RSM)and Monte Carlo *** the calculation process,a new tangent plane sampling method to calculate the response surface function(RSF)is proposed in this paper,which could make sampling points faster come close to the RSF curve,and it is proved that the calculation efficiency increases about 33%comparing with traditional method.

关键词： Umbilical cable Carbon fiber rod Failure analysis Response surface method Reliability

A Numerical Study on the Responses of Wave-Driven Circulation to Varying Incident Wave Forcing and Reef Morphology in A Reef-Lagoon-Channel System

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China Ocean engineering 2022年第6期36卷 933-946页

作者： YAO yu WU Ji LI jiang-xia CHen Long School of Hydraulic and environmental engineering Changsha University of Science and TechnologyChangsha 410114China Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province Changsha 410114China

Wave-driven circulation in a reef-lagoon-channel system has significant ecological,geomorphological,and environmental ***,there is still research gap in fully understanding the responses of wave-driven circulation in the system to varying incident wave forcing and reef *** better interpret the wave-current process inside an idealized reef-lagoon-channel configuration,a numerical model based on the horizontally two-dimensional(2DH)fully nonlinear Boussinesq equations is presented in this *** adopted model is firstly validated by a published laboratory dataset for wave height,wave setup and mean current in the ***,the impacts of wave forcing(incident wave height,incident wave period,reef-flat wave level)and reef morphological(fore-reef slope,cross-shore reef-flat width,channel width,reef roughness)factors that are not fully considered in the previous laboratory studies are reported through the numerical simulations in this ***,the model is applied to analyze the wave pump efficiency parameter in the system,and an empirical equation to predict this parameter is also proposed.

关键词： wave-induced setup circulation cell coral reef wave pump efficiency Boussinesq equations