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外国教育研究 2005年第7期32卷 73-76页

作者：张君辉王敬东北师范大学学校办公室吉林长春130024 北京师范大学教育管理学院北京100875

在近期美国联邦教育计划中,择校制度已成为基础教育改革中引人注目的话题。美国的择校制度,旨在改革传统公立教育的体制和管理方式,从过去的“科层行政管理模式”转化为“经济市场调节模式”,从而打破公立学校的垄断局面,为广大家长和... 详细信息

在近期美国联邦教育计划中,择校制度已成为基础教育改革中引人注目的话题。美国的择校制度,旨在改革传统公立教育的体制和管理方式,从过去的“科层行政管理模式”转化为“经济市场调节模式”,从而打破公立学校的垄断局面,为广大家长和学生提供更多的自由选择权利,以最终达到提高教育效益与教育质量、实现教育公平的目的。

关键词：美国择校制度基础教育改革教育公平

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基于POM模式的感潮河段三维水动力模拟

水力发电学报 2009年第1期28卷 89-94页

作者：刘晓波彭文启刘静玲华祖林王雨春北京师范大学环境学院北京100875 中国水利水电科学研究院水环境研究所北京100038 河海大学环境科学与工程学院南京210098

随着工程要求的不断提高,感潮河段三维水动力的正确模拟有着十分重要的意义。同时,美国普林斯顿大学开发的海洋模型POM已经逐渐应用于我国海湾潮汐流的数值模拟中,并得到了进一步的修正和完善。本文基于POM模式,利用明渠垂向流速分布的... 详细信息

随着工程要求的不断提高,感潮河段三维水动力的正确模拟有着十分重要的意义。同时,美国普林斯顿大学开发的海洋模型POM已经逐渐应用于我国海湾潮汐流的数值模拟中,并得到了进一步的修正和完善。本文基于POM模式,利用明渠垂向流速分布的经验公式分析了三种紊动黏性系数计算方法对流速的影响;结合前人对POM模式的修正工作,建立了感潮河段的三维水动力模型;将该模型应用到长江下游太仓段的计算中,结果表明,基于POM模式建立的感潮河段三维水动力模型的计算值与实测值拟合较好,能够充分反映感潮河段水位以及水流流速随时间的变化情况。

关键词：计算水力学三维数值模拟感潮河段 POM模式紊动黏性系数

The Influence of Reasoning Capacity and Time Pressure on the Information Search Pattern of Career Decision Making

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The Influence of Reasoning Capacity and Time Pressure on the...

Grain Growth of Deformation Induced Ferrite in V Microalloyed Low Carbon Steel During Controlled Cooling Process

2.10 IEEE 2.d Symposium on Web Society

作者： Dawei wang~(1,2., (1 school of Management,Graduate University of Chinese Academy of {2.,beijing,china,100190) (2.school of Psychology,Shandong normal UniversityJinan,Shandong,china,2.0014) Kan Shi~* (school of Management,Graduate University of Chinese Academy of {2.,beijing,china,100190)

＜正＞This article used information board and the experimental material was stimulant career decision tasks aiming at the exploration of decision makers’ information search pattern at different level of time pressure（high time pressure ,low time pressure and no time pressure） and different level of reasoning capacity（high level of reasoning capacity and low level）.The results showed that（1） the main effect of time pressure was significant whereas that of reasoning capacity wasn ’t *** the interact effect of the two was not significant.（2. If time pressure existed,the subjects were inclined to attribute-based information search pattern. However,if there was no time pressure,the alternative- based information search pattern was usually used.

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Journal of Iron and Steel Research International 2011年第S1期18卷 377-382页

作者： wang Kai 1,wang Li-jun 2.wang Qiang 1,HE Ji-cheng 1,LIU Chun-ming 2.(1.Key Laboratory of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University,Shenyang 110819,china 2.school of Materials and Metallurgy,Northeastern University,Shenyang 110819,china) Northeastern Univ Minist Educ Key Lab Electromagnet Proc Mat Shenyang 110819 Peoples R China Northeastern Univ Sch Met & Mat Shenyang 110819 Peoples R China

The effect of vanadium on the DIFT (Deformation Induced Ferrite Transformation) microstructure coarsening in low carbon steel during the continuous cooling processes and isothermal processes at different temperatures were investigated using *** results showed that the steel containing a small amount of vanadium had the similar velocity of grain growth with the vanadium free steel during the continuous cooling process,but a lower velocity of grain growth than that of vanadium free steel during isothermal processes at high *** the other hand,the vanadium remarkably inhibited grain growth in the steel containing a high amount of vanadium during both the continuous cooling and isothermal *** dissolved in matrix is indicated as an important factor on restraining grain growth through estimating the driving force of normal grain growth and the resistance of precipitation particles of vanadium on grain *** influencing mechanism of vanadium dissolved in matrix on the grain growth during the controlled cooling process is discussed.

关键词： low carbon steel vanadium microalloying DIFT grain growth controlled cooling process

Preparation and properties of nanosize MnZn ferrite from δ-FeOOH

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Rare Metals 2006年第Z1期25卷 466-470页

作者： HAO Shunli wang Xin WEI Yu wang Yongming Liu Chunjing school of Material and Engineering Hebei University of Technology Tianjin 300130 China 　 College of Chemistry Hebei Normal University Shijiazhuang 050016 China 　　

Ferrous ion was transformed into feroxyhyte (δ-FeOOH) by oxidation. Then, manganese sulfate and zinc sulfate in some ratio were added to the feroxyhyte solution. The co-precipitation was boiling reflux conditions sometime under constant stirring. The nanosize MnZn ferrite powder was formed. The mechanism of preparation of the nanosize MnZn ferrite was discussed, and the formation of feroxyhyte which was playing a key role during the process was mentioned. The properties of powder was tested by means of X-ray diffraction, transmission electron microscopy and vibrating sample magnetometer. The results show that the samples of spherical particles about 2. nm, which have characteristics of ferrimagnetism, has larger saturation magnetization, but the remanent magnetization and coercivity are comparatively smaller. The spinel MnZn ferrite nanosize powder was successfully prepared from δ-FeOOH at low temperature, with low-carbon steel and peroxide as main material.

关键词： nanosize MnZn ferrite feroxyhyte preparation characterization

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图片-故事练习的测量学特征

心理科学 2010年第3期33卷 673-675页

作者：王其峰许燕北京师范大学心理学院北京100875

本研究通过图片-故事练习(PSE)测量2.4名被试的内隐动机(成就、亲和及权力)和活性抑制,考察PSE的测量学特征,即图片的诱发特征,图片序列的位置效应及内部一致性信度。结果表明PSE的内部一致性信度较低,不同图片对不同动机具有不同的诱... 详细信息

本研究通过图片-故事练习(PSE)测量2.4名被试的内隐动机(成就、亲和及权力)和活性抑制,考察PSE的测量学特征,即图片的诱发特征,图片序列的位置效应及内部一致性信度。结果表明PSE的内部一致性信度较低,不同图片对不同动机具有不同的诱发作用,图片位置会影响动机意象的反应,导致波动效应,符合行为动态理论。此外,亲和动机的图片诱发特征与西方被试相比具有文化差异。

关键词：内隐动机图片-故事练习诱发特征位置效应

Statistical regularity of road network features and ecosystem change in the Longitudinal Range-Gorge Region(LRGR)

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Science Bulletin 2007年第S2期 82-89页

作者： LIU ShiLiang CUI BaoShan WEN MinXia wang Juan DONG ShiKui State Key Laboratory of Water Environment Simulation,school of Environment,{2. normal University,beijing 100875,china

As an intrinsic disturbance factor of landscapa,roads are conspicuous artificial *** landscape pattern and change are influenced by the existence and extension of road *** of the relationship between road features and its disturbance level is important for regional ecosystem *** on the spatial variation analysis of road corridor and network features in the LRGR, we examined the effect of road network on landscape pattern change using ***,the regularity between regional ecological disturbance and network features was *** results showe that road density was significantly relative to topography,village number and the ecosystem patch number, and the significance varied greatly with road *** the increase of road density and network ex- tension,α(network circuitry),β(edge-nodes ratio)andγ(network connectivity)indexes ***, total ecosystem patch number,patch density,landscape evenness and fractal index increased while regional minimum patch area,average patch area and contagion index *** result exhibit that low-grede road had greater effect on regional landscape *** used human distur- bence indexes(H)of 1980 and 2.00 to indicate the ecological disturbance *** Hindexes have a positive and significant relationship withα,βandγindexes,which suggests the ecological disturbance increased with the network expanding.

关键词： road network network structure landscape pattem ecological disturbance LRGR

Formation of calcium phosphate mineral material controlled by microemulsion

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Progress in Natural Science:Materials International 2002年第8期 57-59页

作者： LIU Jingzhou, GOU Baodi, XU Shanjin and wang Kui(1. College of Material Science, Shanxi normal University, Xi'an 710062. {2. 2. Department of Chemical Biology, Peking University school of Pharmaceutical sciences, beijing 100083, {2.) College of Material Science Shanxi Normal University Xi'an 710062 China Department of Chemical Biology Peking University School of Pharmaceutical Sciences Beijing 100083China

In order to prepare calcium phosphate-based material with nano-structure and bioactivity, natural lecithin and n-tetrade-cane were used as the amphipile and the oil phase respectively, along with the water phase, to form a microemulsion template. Phosphate mineralization was induced and controlled by the microemulsion. The products, characterized by scanning electronic microscopy, infrared spectroscopy and X-ray diffraction analysis, are composed of lecithin and hydroxyapatite, and possess the nano-structure of sticks, balls and three-dimensional nets connected by tubes. These results show that the microemulsion can be used to control calcium phosphate mineralization for the preparation of biomimetic mineral materials with various nano-structures.

关键词： microemulsion controlled mineralization nanostructure hydroxyapatite mineral material.

Research of Noise spectrum characteristics of Traction Motor System for Electric Buses Based on Sound Intensity

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Research of Noise spectrum characteristics of Traction Motor...