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18世纪后期是英国东印度公司对藏政策的早期阶段。受当时社会历史条件的限制,英国东印度公司对我国西藏实行以建立直接交往关系为目的的“和平”渗透政策。由于喜马拉雅地区各国在历史上同我国西藏形成的密切关系及其在地缘政治上的屏障作用,英国东印度公司在这一地区的扩张活动同它建立英藏直接交往的尝试一样,都是其对藏渗透政策的组成部分。英国东印度公司在廓尔喀侵藏战争中的卑劣表演最终导致了其早期对藏政策的彻底破产。 相似文献
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在vc和delphi开发工具中都提供了按钮控件，而在vfp6．0中却未能提供此功能，在日前的操作系统windows中都采用了此按钮，vfp没有coolbtn按钮是极为遗憾的。为此而设计了一个coolbtn按钮类，为广大的使用vfp开发者解决此烦恼，使所开发出的产品也具此风格。 相似文献
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计算机网络专业实验室建设是一项高投入的项目，随着IT产品的更新换代，一方面，购入的设备短时间即会落伍；另一方面，硬件实验设备难以实现TCP／IP协议分析。在多年的教学实践中，笔者采用SmartDraw、Sniffer、BosonNetSim等软件及部分硬件设备，建成了计算机网络专业实验室，基本满足了计算机网络专业实验需求。 相似文献
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邓小平对废除干部领导职务终身制进行了深入思考和大胆实践:在改革步骤上,他把"进"摆在第一位,为废除干部领导职务终身制作好干部准备;在制度安排上,他主张建立干部离退休制度、任期制度及公务员制度,为废除干部领导职务终身制提供制度保证;在组织形式上,他提议设立顾问委员会,作为干部领导职务由终身制走向离退休制的过渡办法。同时提倡老干部带头退出领导岗位并身体力行,为废除干部领导职务终身制作出了表率。 相似文献
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Progressive failure analysis of slope with strain-softening behaviour based on strength reduction method 总被引：1，自引：0，他引：1
Based on the strength reduction method and strain-softening model,a method for progressive failure analysis of strain-softening slopes was presented in this paper.The mutation is more pronounced in strain-softening analysis,and the mutation of displacement at slope crest was taken as critical failure criterion.An engineering example was provided to demonstrate the validity of the present method.This method was applied to a cut slope in an industry site.The results are as follows:(1) The factor of safety and the critical slip surface obtained by the present method are between those by peak and residual strength.The analysis with peak strength would lead to non-conservative results,but that with residual strength tends to be overly conservative.(2) The thickness of the shear zone considering strain-softening behaviour is narrower than that with non-softening analysis.(3) The failure of slope is the process of the initiation,propagation and connection of potential failure surface.The strength parameters are mobilized to a non-uniform degree while progressive failure occurs in the slope.(4) The factor of safety increases with the increase of residual shear strain threshold and elastic modulus.The failure mode of slope changes from shallow slip to deep slip.Poisson’s ratio and dilation angle have little effect on the results. 相似文献
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YU Rui 《中国科学院院刊(英文版)》2011,25(4):300-301
The Hall effect, the anomalous Hall effect (AHE) and the spin Hall effect are fundamental transport processes in solids arising from the Lorentz force and the spin-orbit coupling respectively. The AHE, in which a voltage transverse to the electric current appears even in the absence of an external magnetic field, was first detected in ferromagnetic (FM) metals in 1881 and later found to arise from the spin-orbit coupling (SOC) between the current and magnetic moments. 相似文献
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In this paper, we used the platform log data to extract three features (proportion of passive video time, proportion of active video time, and proportion of assignment time) aligning with different learning activities in the Interactive- Constructive-Active-Passive (ICAP) framework, and applied hierarchical clustering to detect student engagement modes. A total of 840 learning rounds were clustered into four categories of engagement: passive (n = 80), active (n = 366),constructive (n = 75) and resting (n = 319). The results showed that there were differences in the performance of the four engagement modes, and three types of learning status were identified based on the sequences of student engagement modes: difficult, balanced and easy. This study indicated that based on the ICAP framework, the online learning platform log data could be used to automatically detect different engagement modes of students, which could provide useful references for online learning analysis and personalized learning. 相似文献