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China Particuology 2006年第6期4卷 283-292页

作者： Yan liu libin liu Jin-Ming Lin Ning Tang Kazuichi Hayakawa State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences p.o. Box 2871 Beijing 100085 China Graduate School of Natural Science and Technology Faculty of Pharmaceutical Sciences Kanazawa University Kakuma-machi Kanazawa 920-1192 Japan

A review is presented on the distribution and characterization of polycyclic aromatic hydrocarbons （PAHs） and their derivatives, including nitro-PAHs and hydro-PAHs, on atmospheric particulates of East Asia. Generally, PAH compounds with two or three aromatic rings are released mainly into the gas phase, while those containing three or more aromatic rings are associated with particulate matter （PM） emission. Particle-associated PAHs are primarily adsorbed on fine particles, and little associated with coarse particles. Investigation into the concentration level of PAHs in different areas can serve not only to reflect the pollutant status and sources but also to lead to the formulation of control strategies. The results of the present study show that China has more severe PAH pollution than such East Asian countries as Japan and Korea.

关键词： polycyclic aromatic hydrocarbon (PAH) airborne particulates distribution East Asia review

Heterogeneous precipitate microstructure in titanium alloys for simultaneous improvement of strength and ductility

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Journal of Materials Science & Technology 2022年第29期124卷 150-163页

作者： Mengyuan Hao Pei Li Xuexiong Li Tianlong Zhang Dong Wang Qiaoyan Sun libin liu Jinshan Li Yuyou Cui Rui Yang Dongsheng Xu Frontier Institute of Science and Technology State Key Laboratory for Mechanical Behavior of MaterialsXi’an Jiaotong UniversityXi’an 710049China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering Central South UniversityChangsha 410083China State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China Thermal Power Research Institute Co.Ltd. Xi’an 710032China

The design of alloys with simultaneous high strength and high ductility is still a difficult ***,we propose a new approach to designing multi-phase alloys with a synergistic combination of strength and ductility by engineering heterogeneous precipitate microstructures through the activation of different transformation *** a two-phase titanium alloy as an example,phase field simulations are carried out firstly to design heat treatment schedules that involve both conventional nucleation and growth and non-conventional pseudospinodal decomposition mechanisms,and the calculated microstructures have been evaluated by crystal plasticity finite element *** to simulations,we then set a two-step heat treatment to produce bimodalα+βmicrostructure in *** mechanical testing shows that the ductility of the alloy is increased by~50%and the strength is increased by~10%as compared to its unimodal *** work may provide a general way to improve the mechanical properties of alloys through multiscale microstructure design.

关键词： Titanium alloys Phase field simulation Crystal plasticity finite element Two-step aging Pseudospinodal decomposition mechanisms Multiscale heterogeneous microstructure

Thermodynamic assessment of the Al–Dy, Dy–Zr and Al–Dy–Zr systems

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Chinese Science Bulletin 2014年第10期59卷 1738-1746页

作者： Hong Bo libin liu Xiang Xiong Zhanpeng Jin School of Materials Science and Engineering Central South University Key Laboratory of Non-ferrous Materials Science and Engineering Ministry of Education Central South University State Key Laboratory of Powder Metallurgy Central South University

Like Al3Sc,the Al30Dy7Zr3compound has an L12structure,implying that it could probably be used to improve the strength of aluminum alloys at elevated ***,it is extremely important to understand the phase relations of the Al–Dy–Zr system in the Al-rich ***,the phase diagram of the Al–Dy binary system was re-assessed with the C15_Laves phase treated as a stoichiometric ***,using the special quasirandom structure containing 16 atoms(SQS_16)to simulate Dy1-xZrx(x=0.25,0.5,and 0.75)hcp_A3 solid solutions,their enthalpies of mixing at 0 K were calculated by the first-principles *** on these results and the evaluated phase diagram in literature,the Dy–Zr binary system was optimized *** the thermodynamic descriptions of the three constituent binary systems,the phase diagram of the Al–Dy–Zr ternary system in the Al-rich corner was optimized finally by coupling the first-principles calculation with the CALculation of PHAse Diagram method.A good agreementhas been reached between the calculated phase relations and the experimental results,which indicates that the current thermodynamic description is reasonable.

关键词：热力学评估人工智能第一原理计算镝 Zr 二元体系第一原理方法随机结构

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Influence of Heating Rate and Calcining Temperature on Properties of 95 Polycrystalline Alumina Fiber

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China's Refractories 2012年第3期21卷 29-33页

作者： XU Jianfeng FU Shunde liu libin JIA Jia GAN Xiaoming State Key Laboratory of Advanced Refractories Sinesteel Luoyang Institute of Refractories Research Co.Ltd. Luoyang 471039 China

The swung gel fibers were hea, ted to 400 ℃ at 0. .5 ,1, 1.5,2,2.5,3and4 ℃ min^-1 of heating rate, respectivel, and *** 1 h ; then heated to 600 ℃ at 3 ℃ min ^-1 *** rate amt soaked for 1 h at last calcined m 1 0... 详细信息

关键词： 95 polycrystalline alumina fiber healing rate calcining temperature average single fiber tensile strength

Species: Renormalization-group Method

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Communications in Nonlinear Science and Numerical Simulation 1998年第4期3卷 199-203页

作者： Fuxuan CHANG Houqiang LI De liu and libin LIN (Department of Physics, Open Laboratory of Radiation Physics and Technology, Sichuan Union University, Chengdu 610064, China) Department of Physics Open Laboratory of Radiation Physics and Technology Sichuan Union University Chengdu 610064 China

In this paper, we have studied the structure of DLA with two species by using the kinet real-space renormalization group method introduced by WANG. Following the RG rules and growth processor, We have gained the configuration of 2×2 cell, calculated the fractal dimensions, multifractal spectra, and free energy when different value of p are applied. And we studied the problem of phase transition with different value of p. Our results demonstrate that the change of p doesn't affect the fractal dimension, but can affect the multifractal spectrum and the phase transition.

关键词： DLA with two species phase transition renormalization-group

In vitro study of micro-dystrophin gene-modified mesenchymal stem cells

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Neural Regeneration Research 2010年第7期5卷 496-501页

作者： Daidi Zhao Zhiyun Lian libin liu Li Luo Huiying Li Ju liu Hongyu Zhou Department of Neurology West China Hospital of Sichuan University Chengdu 610041 Sichuan Province China

BACKGROUND： Studies have shown that the transplantation of mesenchymal stem cells （MSCs） improves dystrophin expression in muscle cell membrane of mdx mice and plays a role in ameliorating sport injuries to the myocyte. In addition, dystrophin gene plasmid injection exhibits therapeutic effect in mdx mice. However, these two methods exhibit shortcomings, such as low rate of post-transplantation expression. Therefore, the present study determined the combinatorial effects of these two methods. OBJECTIVE： To transfect and observe effects of pSL139 plasmid carrying the micro-dystrophin gene into MSCs, as well as in vitro micro-dystrophin gene expression in transfected MSCs. DESIGN, TIME AND SETTING： A comparative, molecular biology study was performed at the Laboratory of Tissue Engineering, West China Medical Center, Sichuan University from March 2007 to February 2008. MATERIALS： The pSL139 plasmid was cloned and provided by the Department of Neurology, Washington University, USA. Lipofectamine 2000 was purchased from Invitrogen, USA. Mouse anti-human dystrophin N-based terminal monoclonal antibody was purchased from Chemicon, USA. METHODS： Differential velocity adherent technique and density gradient centrifugation were combined to separate and culture MSCs from C57/BL10 mice. The cells were induced to trans-differentiate into osteoblasts. Subsequently, the Lipofectamine 2000 method was used to mediate transfection of plasmid pSL139 into third generation MSCs. MAIN OUTCOME MEASURES： Semi-quantitative reverse transcription polymerase-chain reaction and immunofluorescence were respectively employed to detect micro-dystrophin mRNA and protein expressions in MSCs. RESULTS： At 48 hours after MSC transfection with plasmid pSL139, a 379-kb target band was observed by agarose gel electrophoresis. Immunofluorescence revealed micro-dystrophin expression up to 45%-55%. CONCLUSION： Micro-dystrophin mRNA and protein were highly expressed in pSL139-transfected MSCs, which provided

关键词： Duchenne muscular dystrophy mesenchymal stem cells micro-dystrophin gene modification

Effect of Dew Point during Heating on Selective Oxidation of TRIP Steel

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Effect of Dew Point during Heating on Selective Oxidation of...

第十一届中国钢铁年会

作者： Jiang Guangrui Wang Haiquan liu libin Teng Huaxiang Shougang Research Institute of Technology Beijing key Laboratory of Green Recyclable Process for Iron & Steel Production Technology

The influence of dew point during heating on the selective oxidation behavior of two kinds of transformation-induced plasticity（TRIP） steel was studied by means of a Hot Dip Process Simulator. The selective oxidation behavior of alloying elements on the surface was studied by glow discharge optical emission spectroscopy（GDOES） and scanning electron microscopy（SEM）. For a Al-bearging TRIP steel, less Al-rich oxides were found on the steel surface and there was less Mn on the surface when the dew point during heating was lower. On the contrary, for a Si-bearging TRIP steel, more film-like Si-rich oxides were found on the steel surface and there was more Mn on the surface when the dew point during heating was higher.

关键词： selective oxidation dew point TRIP steel oxides

来源： cnki会议评论

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高等职业教育战略联盟形成机制研究

国家教育行政学院学报 2013年第9期 25-30页

作者：刘丽彬北京大学北京100871

经济结构调整、产业转型升级以及国际化发展趋势要求高等职业教育创新教育教学模式,培养适应产业需求的高技能人才。内部自身发展提出的新要求为高等职业教育战略联盟的形成提供了现实条件。资源基础理论、核心能力理论、组织学习理论... 详细信息

经济结构调整、产业转型升级以及国际化发展趋势要求高等职业教育创新教育教学模式,培养适应产业需求的高技能人才。内部自身发展提出的新要求为高等职业教育战略联盟的形成提供了现实条件。资源基础理论、核心能力理论、组织学习理论和耦合理论为高等职业教育战略联盟的形成提供了理论支撑,诠释了战略联盟形成的深层次动机。

关键词：高等职业教育战略联盟形成机制

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从知识管理思想的起源探讨知识管理的概念

图书馆杂志 2008年第6期27卷 2-7,38页

作者：刘丽斌河北大学图书馆河北大学管理学院保定071002

时下关于知识管理的概念比较混乱。本文从知识管理产生的背景、知识管理的理论基础、知识管理的发展历史以及国外学者对知识管理的定义四个方面展开论述,正确理解和认识知识管理。

关键词：知识管理概念管理学

具有泄漏时滞和混合加性时变时滞复数神经网络的状态估计

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应用数学和力学 2019年第11期40卷 1246-1258页

作者：刘丽缤潘和平重庆工商大学财政金融学院重庆400067 成都大学高等研究院及商学院成都610106

研究了具有泄漏时滞、加性离散时变时滞、加性分布时变时滞复数神经网络的状态估计问题.在复数神经网络不分解条件下,通过构造合适的Lyapunov-Krasovskii泛函,并应用自由权矩阵、矩阵不等式和倒数凸组合法等方法,通过可观测的输出测量... 详细信息

研究了具有泄漏时滞、加性离散时变时滞、加性分布时变时滞复数神经网络的状态估计问题.在复数神经网络不分解条件下,通过构造合适的Lyapunov-Krasovskii泛函,并应用自由权矩阵、矩阵不等式和倒数凸组合法等方法,通过可观测的输出测量来估计神经元状态,给出了判断误差状态模型全局渐近稳定的与时滞相关的复数线性矩阵不等式.最后,通过一个数值仿真算例验证了理论分析的有效性.

关键词：泄漏时滞加性时变时滞复数神经网络线性矩阵不等式状态估计