部分边壁运动所诱发的三维势流场的数学解

本文求解扰动的三维势流场，所用的方法为富里叶变换和分区法。文章对所讨论的问题获得了理论解。     

彩色电视光纤传输系统中线性相移低通滤波器的设计

本文提出了用平板电容器的电位模拟和试凑法相结合来设计彩色电视光纤传输系统中的线性相移低通滤波器。     

Model-sensitive sequential optimal designs

The increasing number of experimenters using computer-generated experimental designs creates an increasing need to have design procedures that are less sensitive to model misspecification. To address this problem, the notion of empirical models that have both important and potential terms is used. A two-stage design strategy for planning experiments in the face of model uncertainty is proposed. The advantage of this procedure resides in the rearrangement of active potential terms at the end of the first stage using marginal posterior probabilities of different candidate models. The two-stage procedure has better estimation efficiency than its one-stage alternatives available from the literature.     

Development of partial-charge potential for GaN

Partial-charged potentials for GaN are systematically developed that describe a wide range of structural properties, where the reference data for fitting the potential parameters are taken from ab initial calculations or experiments. The present potential model provides a good fit to different structural geometries and high pressure phases of GaN. The high-pressure transition from wurtzite to rock-salt structure is correctly predicted yielding the phase transition pressure of about 55 GPa, and the calculated volume change at the transition is in good agreement with experimental data. The results are compared with those obtained by ab initio simulations.     

基于全局消息传播的贝叶斯推理

在贝叶斯网络中，常常需要作不确定概率推理。然而针对一般复杂网络，精确推理算法由于计算复杂度太高而常常被摒弃。针对这一问题，本文提出了一种基于全局传播的PPJT近似推理算法。PPJT算法采用消息传播机制，通过消息的收集与分发过程，可以更新和修正连接树节点的团势并最终生成相容连接树。与另一种常用的近似推理算法即似然权重（Likelihood Weighting）算法的时间性能对比实验显示，采用消息传播机制的PPJT算法有效地降低了计算的时间复杂度；同时与似然权重算法的性能对比实验表明，在相对小规模观察样本输入条件下，PPJT算法能够保证更高的概率推理精度。PPJT算法为实现一般复杂网络中的概率推理提供了一种新的理论工具。     

Seepage from a Rectangular Ditch to the Groundwater Table

This study presents both a numerical and an experimental solution to seepage from a rectangular ditch or elongated pond to a groundwater table of infinite horizontal extent. Because of the unknown location of the free surface, the flow domain is transformed into the complex potential plane using the inverse formulation method, where the free surface becomes a straight line. The method of finite differences was used to solve the boundary value problem. The problem was also investigated experimentally using a sand tank model. For comparison purposes, a one-dimensional analytical solution is also presented. The results were compared with each other and with those available in the literature obtained with other solution techniques. The parameters affecting the seepage rate were investigated and the resulting relationships are presented in dimensionless graphs. It is believed that these graphs may be of use in design problems. The conditions for which the simplified one-dimensional analytical solution agrees well with the results of the sophisticated two-dimensional numerical solution are identified.     

一起66kV电压互感器爆炸事故的分析

通过对一起66kV电压互感器爆炸事故的检查和分析，找出了造成事故的原因，提出了防止同类事故发生的措施。     

反偏二极管的计算机辅助设计

利用有限元法解泊松方程，可以得到反偏二极管中的二维电位分布和最大电场强度．模拟结果指出：正斜角二极管中的电场强度小于负斜角二极管中的电场强度，前者的最大电场强度处于反偏二极管的中心，而后者的最大电场强度则处于表面．因此，正斜角二极管可以达到高的反向击穿电压．     

蠕变分析的有限元方法

介绍了蠕变分析的基本原理及有限元公式，并将蠕变分析加入参考文献［１］所述的有限元程序，扩充为热弹塑性蠕变分析的有限元程序．文中给出了典型算例．     

油气层中常见微粒的运移程度及其与ζ电位关系的研究

微粒运移是造成油气层损害最严重和最普遍的因素之一。要防止油气层中的微粒运移，就必须先弄清楚油气层中常见微粒的运移情况和影响微粒运移的主要因素。因此，通过对国内外大量微粒分析资料的统计分析，选定了油气层中常见的地层微粒作为研究对象，用新建立的、较完善的实验方法研究了这些微粒的运移程度，对这些微粒的ζ电位进行测定，发现其运移程度与其ζ电位的大小有关。一般地说，微粒ζ电位值越大，其运移程度也越大。