山西黄土CBR的影响分析

在山西省选取5种典型黄土，采用室内试验方法，制备不同击实次数，不同含水量的试件用于CBR值的测定，分析含水量和压实度对黄土填料CBR值的影响，并建立了CBR与含水量的相关关系式。试验结果表明：含水量对CBR值的影响程度最大，在最佳含水量，最大压实度条件下的CBR值最大，含水量越大，击实次数对CBR值的提高效果甚微。随着击实次数的增大，浸水 CBR和不浸水CBR与含水量的相关关系都呈现一定的规律性。     

类矩形双肢钝体涡致振动和气动抑振机理

针对具有类矩形双肢钝体断面拱肋的大跨度拱桥在风洞试验过程易出现大幅涡激振动问题，沿拱肋模型表面进行动态风压同步测量及基于POD算法的本征气动力荷载分布模式分解，获得了涡振发生时对于周期性涡激力具有最大贡献的气动力荷载作用位置，初步揭示出此类断面涡激动发生时的局部气动力荷载作用机制。以上海卢浦大桥和肇庆西江特大桥此类具有双肢钝体断面拱桥为工程实例，结合涡激气动力沿拱肋周向时空气分布特征，提出并以二维悬吊节段模型风洞试验验证了拱肋断面多种有针对性的气动控制措施；结合实际桥梁拱肋的三维空间效应，利用全桥气弹模型     

The power functions of the likelihood ratio tests for a simply ordered trend in normal means

Likelihood ratio tests for the homogeneity of k normal means with the alternative restricted by an increasing trend are considered as well as the likelihood ratio tests of the null hypothesis that the means satisfy the trend. While the work is primarily a survey of results concerning the power functions of these tests, the extensions of some results to the case of not necessarily equal sample sizes are presented. For the case of known or unknown population variances, exact expressions are given for the power functions for k=3,4, and approximations are discussed for larger k. The topics of consistency, bias and monotonicity of the power functions are included. Also, Bartholomew's conjectures concerning minimal and maximal powers are investigated, with results of a new numerical study given.     

复合分层土壤导电模型简化方法研究

针对如何构造合理的土壤导电模型来准确计算流过变压器中性点直流量的难题,基于特定土壤导电模型,分析了不同土壤配置下模型简化对地表电位的影响,结果表明在一定条件下简化模型仅改变地表电位绝对值,对各变电站间电位差影响可以忽略,提出了合理选取土壤导电模型的判据及其阈值。研究结果有助于准确评估流过变压器中性点直流量,为实际工程中直流接地极附近变电站的选址提供了理论参考。     

基于数字照相技术的边坡变形自动化监测技术研究

将数字摄影测量技术应用于边坡位移自动监测。在边坡上布设固定标志点，将非量测数码相机置于边坡正面，运用程序控制相机间隔一定时间对边坡进行拍摄。对拍摄图像预处理后使用圆心亚像素识别算法确定测点亚像素位置。根据标志初始实际距离与初始相片像素距离建立物象比例，对比各次识别结果得到各测点实际的相对位移。运用GPS技术和计算机技术，本系统可实现数据交换、控制指令发送和预警的适时监控。本系统采用非量测数码相机，相对于传统边坡检测方法具有成本低，精度高，需要人工干预少等优点，现场试验50 m距离识别精度达到3 mm，取得较好效果，可以作为大量边坡自动化监测的有效手段。     

网上银行顾客感知服务质量影响因素研究

通过文献研究和深度访谈，提炼出可能影响网上银行顾客感知服务质量的19个因素，通过探索性因子分析，将这19个因素归纳为经济性、易用性、履行性、安全性和响应性。通过相关分析和多元回归分析发现，有4类因素与网上银行顾客感知服务质量呈显著正相关，依次是经济性、易用性、履行性和安全性。通过对我国主要网上银行服务质量测评发现，当前我国网上银行服务质量不高，且各家网上银行服务质量存在明显差异。     

Expected Utility Consistent Extensions of Preferences

We consider the problem of extending a (complete) order over a set to its power set. The extension axioms we consider generate orderings over sets according to their expected utilities induced by some assignment of utilities over alternatives and probability distributions over sets. The model we propose gives a general and unified exposition of expected utility consistent extensions whilst it allows to emphasize various subtleties, the effects of which seem to be underestimated – particularly in the literature on strategy-proof social choice correspondences.      

Transforming Sex: An Interview with Joanne Meyerowitz,Ph.D. Author of How Sex Changed: A History of Transsexuality in the United States

Christine Jorgensen's widely publicized sex reassignment surgery in 1952 brought transsexualism to worldwide attention and fostered medical interest in transsexualism. Joanne Meyerowitz has traced the history of Jorgensen's personal odyssey, the medical history of transsexualism, and the broader impact of transsexualism on United States culture. In this interview, Meyerowitz discusses how she came to this project and some of its theoretical and methodological challenges. Finally, she sets her historical work in the context of contemporary gender and transgender politics.