3 Jahre Akkreditierung Stand, Erfahrungen, Probleme

Vor 3 Jahren ist ein beispielloser Prozess zur Umgestaltung des deutschen Hochschulwesens angelaufen. Mit dem Übergang zu Bachelor- und Masterstudiengängen wurde eine Qualitätssicherung nach Art der international üblichen Akkreditierung erforderlich.     

DLL23XA双侧向测井仪的研制

以往双侧向测井仪动态范围小，测量精度低，为此开发了DLL23XA双侧向测井仪。该仪器主要单元采用厚膜电路，稳定性、一致性好；深、浅屏流源采用可变功率控制，提高了仪器的动态范围。仪器采用3506P例进行数据传输，可方便地配接各种地面系统。     

Potentiodynamic Studies of the Anodic Behavior of Zn–Ni Alloys Electroplated from Acetate–Chloride Baths

The potentiodynamic anodic behavior of zinc, nickel, and their alloy is studied depending on the compositions of both the electrolyte for dissolution and electroplates to be dissolved. Zinc deposits are indifferent to the presence of chloride ions in solutions. However, the latter ions strongly affect the anodic behavior of Ni and Zn–Ni alloy. The curves of increasing the polarization of the alloys containing more than 70% Ni demonstrate peaks corresponding to the dissolution of both the Zn–Ni solid solution in a range from –0.2 to +0.2 V and nickel in a range from 0.6 to 0.9 V. For alloys containing less than 31% Ni, no peak of its anodic dissolution is observed, because all Ni is bound with Zn.     

关于Ada95变体部分等语法的修正意见

本文指出了Ａｄａ９５ 参考手册中记录变体部分、记录聚集、分情形语句与异常处理段等语法描述中存在的问题，并分别给出了它们的修正方案。     

基于小波的彩色序列图象压缩编码

此文提出了一种基于小波变换的运动估计算法，时间复杂度比常规算法降低了一个数量级，同时在估值精度上可与常规算法媲美。利用更佳频率分辨率小波分解处理运动补偿余量误差善了复现图象质量。实验结果表明，该算法在高压缩比情况下图象复现质量显著优于ＭＰＥＧ－２，具有广阔的应用前景。     

在高温,高压,氢环境中21／4Cr—1Mo钢及其焊接接头KIH的测试

采用恒位移试验方法，在高温、高压、氢环境中用ＷＯＬ试样测试了２１４Ｃｒ－１Ｍｏ钢及其焊接接头的应力腐蚀门限应力强度因子ＫＩＨ。试验结果表明：采用恒位移试验方法测试高温、高压、氢环境中２１４Ｃｒ－１Ｍｏ钢及其焊接接头的ＫＩＨ是可行的。     

GaN材料系列的研究进展

ＧａＮ及其合金作为第三代半导体材料具有一系列优异的物理和化学性质，在光电子器件，高温大功率电子器件及高频微波器件应用方面具有广阔的前景，已成为当前高科技领域的研究重点，论述了这种材料的研究历史与发展现状，物理与化学性质，薄膜的生长方法及在光学电子和微电子器件应用于方面的研究进展。     

多孔挡板流化床还原UO3反应器模型的研究

针对ＵＯ＿３的Ｎ＿２还原反应建立了多孔挡板流化床反应器模型。将多孔挡板床的每一级视为具有相似的流动状态，每一级的上、下段称为稀、密相段，分别用鼓泡床和活塞流模型描述。该模型的计算值与￠６３ｍｍ的多孔挡板床Ｈ＿２还原ＵＯ＿３的热态实验值能较好的吻合。还预计了还原温度、操作气速和挡板结构参数对固相转化率的影响，为该类反应器的工业设计、放大和优化提供了依据。     

Smart computational fracture of materials and structures

The use of the finite element method for complex engineering problems is now common. To ease the burden on the engineer the development of smart or adaptive computational methods is now required to model complex problems. In this paper we investigate the development of an adaptive finite element method for fracture-related problems. The adaptive method involves various stages which include the finite element analysis, error estimation/indication, mesh refinement and fracture/failure analysis in a loop. Some simple error estimators, based on stress projection, are used to investigate the adaptive finite element process. Element refinement is based on three schemes; the first and second are a simple and hierarchical refinement scheme with transitioning which avoids the need for constraint equations between element boundaries. Another scheme based on constraint equations between elements is also examined. The energy norm is used to estimate the element error. The software has the ability to introduce a discrete fracture in the structure according to standard fracture analysis practice. Crack tip parameters are calculated using a least-squares fit of the displacements into the asymptotic crack tip displacement field. Some simple examples are used to investigate the adaptive process, its behavior and some of the practical problems encountered. The convergence and equilibrium of the adaptive process, in terms of global error in the energy norm, are investigated. In the example the same problem is analyzed using both a fine computational grid and a coarse one. The coarse mesh is then adapted using the three different procedures available. The estimated error in the solution and the stress intensity are shown against the number of elements and number of iterations. Some further areas of research in adaptive finite element analysis are discussed.     

微机传真系统

本文介绍了集传真技术、通信技术、微型计算机技术于一体的微机传真系统，提出了微机传真系统在硬件接口及报表识别上的实现方法。