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Nuclear pseudogenes of mitochondrial DNA as a variable part of the human genome

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Cell Research 1999年第4期9卷 281-290页

作者： YUAN JIN DUO JIN XIU SHI GUANG XUNMENG LI GUO AN GENG XI HU( Shanghai Institute of Cell Biology and the ShanghaiLife Science Center, Chinese Academy of Sciences,320 Yue Yang Road, Shanghai 200031, china)( department of Biology, Shandong normal Univers department of Biology Shandong Normal University Jinan 250014 China

INTRODUCTIONNuclearpseudogenesofmitochondrial(mt)DNAwereinitiallydiscoveredintheearly80's[1--6].However,mechanismsforthegenerat***--[7--8]andDNAmediated[9--11]processeshavebeensugges... 详细信息

INTRODUCTIONNuclearpseudogenesofmitochondrial(mt)DNAwereinitiallydiscoveredintheearly80's[1--6].However,mechanismsforthegenerat***--[7--8]andDNAmediated[9--11]processeshavebeensugges...

关键词： Gene amplification genome instability mitochondrial pseudogene.

On the Origin of Migmatites in Yunlu, Western Guangdong

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Acta Geologica Sinica(English Edition) 1995年第1期69卷 41-52,118页

作者： Chen Bin and Huang Fusheng department of Geology, Peking University, beijing Jiang M inxi department of Geology Peking University Beijing

Partially migmatized rocks, banded migmatites, augen-banded migmatites and gneissic migmatites are developed successively from Xindong to Yunlu, Gaozhou, Guangdong Province in the Yunkai Caledonian orogenic belt at the border between Guangdong and Guangxi. Mass-balance calculations, statistical analysis of the textural relations and mineralogical and geochemical studies of the migmatites and the study of the metamorphlc setting of the Yunlu area indicate that the migmatites in the study area were primarily formed by anatexis without remarkable introduction of foreign components such as K, Na and Si and removal of Ca, Fe, Mg, etc.

关键词： migmatite anatexis leucosome Yunlu

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一类二阶n-维中立型微分系统周期解问题

数学学报（中文版） 2003年第3期46卷 601-610页

作者：鲁世平葛渭高安徽师范大学数学系芜湖241000 北京理工大学应用数学系北京100081

笔者利用重合度原理研究一类二阶n-维中立型微分系统(d2)/(dt2)(x(t)-Cx(t- ))+d/(dt)gradF(x(t))+gradG(x(t-τ(t)))=p(t)的周期解问题,得到了周期解存在性的新结果,推广了已有工作中相应的结论.

关键词：重合度原理中立型微分系统周期解

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刻板印象的自动过程研究新进展

心理科学 2003年第1期26卷 41-44页

作者：连淑芳华东师范大学心理学系上海200062

本文从两个方面对刻板印象的自动过程研究进行了回顾 :自动过程是固定的和不可避免的 ;自动过程是有条件的。一个传统的观点在心理学中占据了将近 4.0年 ,它认为刻板印象是自动激活的 ,不考虑知觉者的意图和目标。近几年来针对自动刻板... 详细信息

本文从两个方面对刻板印象的自动过程研究进行了回顾 :自动过程是固定的和不可避免的 ;自动过程是有条件的。一个传统的观点在心理学中占据了将近 4.0年 ,它认为刻板印象是自动激活的 ,不考虑知觉者的意图和目标。近几年来针对自动刻板印象的适应性的研究将近 5 0项 ,对此提出挑战 ,研究表明知觉者的目的和意图能够起一些作用 ,自动刻板印象能够被一系列的因素所缓和。

关键词：刻板印象观点过程研究知觉挑战意图目标自动激活心理学传统

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多尺度导航电子地图系统的关键技术研究

四川大学学报（工程科学版） 2007年第S1期39卷 247-250页

作者：王艳慧孟浩首都师范大学资源环境与旅游学院三维信息获取与应用教育部重点实验室北京100037 清华大学公共管理学院北京100084

多尺度导航电子地图系统融合了数字制图技术、GIS技术、多媒体技术等多种高科技手段,可为实时导航过程中的路径规划、引导、显示功能提供一套便捷的、可视化的空间信息服务平台,但现有的研发方案并没有很好地顾及用户对自适应智能缩放... 详细信息

多尺度导航电子地图系统融合了数字制图技术、GIS技术、多媒体技术等多种高科技手段,可为实时导航过程中的路径规划、引导、显示功能提供一套便捷的、可视化的空间信息服务平台,但现有的研发方案并没有很好地顾及用户对自适应智能缩放地图的浏览和查询需求。针对导航电子地图的多尺度特性和多媒体特性,设计了多尺度导航电子地图系统的研制与开发框架,详细论述了构建多尺度导航电子地图系统的总体结构及设计方案,重点剖析了基于"目标内插法"实现多尺度导航电子地图智能化显示的关键技术,并在基于VB和MapX的二次开发环境下实现了对多尺度导航电子地图信息的多尺度显示、多尺度查询、空间分析、最优路径设计和引导等功能。测试结果表明了系统运行的可靠性和稳健性。

关键词：多尺度导航电子地图多尺度智能显示目标内插空间分析

The changes of community components and their horizontal patterns caused by highway construction in the Longitudinal Range-Gorge Region

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Science Bulletin 2007年第S2期 213-224页

作者： LIU Jie CUI BaoShan DONG ShiKui WANG Juan ZHAO ShuQing School of Environment,beijing normal University,beijing 100875,china

Taking Dabeo(from Dali City to Baoshan City)and Sixiao(from Simeo City to Xiaomengyang Town) highways In the Longitudinal Range-Gorge Region as examples,the changes of community compo- nents and their horizontal patterns caused by highway construction were discussed in this article with some mathematic methods,such as contrast analysis,difference analysis and so *** indicate: 1)Under the disturbances of highway construction,the predominant species and sub-predominant species’ quantities of arbor and shrub plants on roadsides would decrease to some extent,that of herbaceous plants would increase a lot,and some invading species would appear and distribute.2) Influenced by highway construction,the distributions of predominant species and sub-predominant species on roadsides would change from uniform or random pattern to aggregate pattern,and their aggregate degrees and diffusivities would increase obviously.3)The average coverage degrees and heights of Ageratina adenophora and Chromolaena odorata near roads are higher than that far away from roads,but the frequencies of the 2 species have no obvious change on roadsides within 200 m.4. The positions and landforms of road sections are also important factors influencing community com- ponents,the calculated result shows that the influencing Intensities on community components caused by Dabeo highway are higher than that caused by Sixiao highway,and the compared result of the in- fluencing intensities between the 2 different landforms meet:mountainside>mountaintop.

关键词： community component horizontal pattern change highway construction Longitudinal Range-Gorge Region

前、后注意网络的关系——返回抑制和Stroop干扰效应

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心理科学 2003年第4期26卷 638-641页

作者：张明陈骐金志成东北师范大学心理学系长春130024 北京大学心理学系北京100871 华南师范大学心理学系广州510631

将IOR范式与Stroop任务相结合,试图从探讨IOR与Stroop干扰效应之间的关系来推测AAN和PAN之间的关系以及IOR与注意之间的关系。结果表明,在控制条件下出现了显著的IOR,在Stroop条件下没有出现明显的IOR;提示和非提示位置上均出现了显著的... 详细信息

将IOR范式与Stroop任务相结合,试图从探讨IOR与Stroop干扰效应之间的关系来推测AAN和PAN之间的关系以及IOR与注意之间的关系。结果表明,在控制条件下出现了显著的IOR,在Stroop条件下没有出现明显的IOR;提示和非提示位置上均出现了显著的Stroop干扰效应,但提示位置上的干扰量要显著低于非提示位置。从IOR和Stroop干扰效应之间的关系可推知,PAN和AAN是两个有交互影响的注意网络,AAN对PAN有压制作用,而PAN对AAN也有一定的影响。最后,作者对返回抑制与注意间的关系进行了深入的讨论。

关键词：前注意网络后注意网络注意子网络认知功能 Stroop干扰效应返回抑制 IOR范式

Tribological characteristics of UHMWPE composite and relationship with its compressive behavior

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Science china(Physics,Mechanics & Astronomy) 2004年第z1期47卷 79-87页

作者： LI Jian, GUO Zhiguang, HUA Meng, QIN Xiangpei & WEN ShizhuWuhan Research Institute of Materials Protection, Wuhan 4.0030, china department of Manufacturing Engineering and Engineering Management, City University of Hong Kong, Hong Kong, china State Key Laboratory of Tribology, Tsinghua University, beijing 1000184. china 1. Wuhan Research Institute of Materials Protection 430030 Wuhan China2. State Key Laboratory of Tribology Tsinghua University 1000i84 Beijing China3. Department of Manufacturing Engineering and Engineering Management City University of Hong Kong Hong Kong China

The triboogical characteristics and the mechanics compress behaviors of pure and composite ultra high molecular weight polyethylene (UHMWPE) were investigated using tribological apparatus and universal materials testing apparatus *** show that there are direct relationships between the sliding friction, wear characteristics, and compression behaviors of UHMWPE composite. The composite of UHMWPE with added copper particles had great improvement in tribological characteristics and mechanics behaviors. Based on the experimental results, a microstructure model of UHMWPE-copper composite is preliminarily proposed.

关键词： UHMWPE, composite tribology, compressive behavior creep.

Numerical simulation of mechanisms of deformation,failure and energy dissipation in porous rock media subjected to wave stresses

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Science china(Technological Sciences) 2010年第4期53卷 1098-1113页

作者： JU Yang1,2,WANG HuiJie1,YANG YongMing1,HU QinAng3 & PENG RuiDong1 1 State Key Laboratory of Coal Resources and Safe Mining,beijing Key Laboratory of Fracture and Damage Mechanics of Rock and Concrete,china University of Mining and Technology,beijing 100083,china 2 {4. of Mechanical and Manufacturing Engineering,University of Calgary,Calgary,Alberta,T2N 1N4.Canada 3 School of Environment and Civil Engineering,College of Engineering,Oklahoma State University,Stillwater,OK 74.78,USA 1. State Key Laboratory of Coal Resources and Safe Mining Beijing Key Laboratory of Fracture and Damage Mechanics of Rock and Concrete China University of Mining and Technology Beijing 100083 China2. Department of Mechanical and Manufacturing Engineering University of Calgary Calgary Alberta T2N 1N4 Canada3. School of Environment and Civil Engineering College of Engineering Oklahoma State University Stillwater OK 74078 USA

The pore characteristics,mineral compositions,physical and mechanical properties of the subarkose sandstones were acquired by means of CT scan,X-ray diffraction and physical tests.A few physical models possessing the same pore characteristics and matrix properties but different porosities compared to the natural sandstones were *** 3D finite element models of the rock media with varied porosities were established based on the CT image processing of the physical models and the MIMICS software *** failure processes of the porous rock media loaded by the split Hopkinson pressure bar(SHPB) were simulated by satisfying the elastic wave propagation *** dynamic responses,stress transition,deformation and failure mechanisms of the porous rock media subjected to the wave stresses were *** is shown that an explicit and quantitative analysis of the stress,strain and deformation and failure mechanisms of porous rocks under the wave stresses can be achieved by using the developed 3D finite element *** applied wave stresses of certain amplitude and velocity,no evident pore deformation was observed for the rock media with a porosity less than 15%.The deformation is dominantly the combination of microplasticity(shear strain),cracking(tensile strain) of matrix and coalescence of the cracked regions around *** stresses lead to microplasticity,while tensile stresses result in cracking of the *** and coalescence of the matrix elements in the neighborhood of pores resulted from the high transverse tensile stress or tensile strain which exceeded the threshold *** simulation results of stress wave propagation,deformation and failure mechanisms and energy dissipation in porous rock media were in good agreement with the physical *** present study provides a reference for analyzing the intrinsic mechanisms of the complex dynamic response,stress transit mode,deformation and failure mechanisms and the disaster mechanism

关键词： porous media three-dimensional finite element model rock media stress wave failure mechanism energy dissipation