一种异地库房管理中远程数据维护方法的研究与应用

介绍了在异地库房管理中，采用C／S结构和远程数据库访问技术等实现的对远程数据维护的一种方法。通过该方法开发的远程数据传输系统，实现了远程客户端对服务器的通信，完成了远程数据在后台服务器的集中管理和服务器对远程数据的格式、类型等的控制，同时保证了远程客户端对服务器操作的并发性，客户端数据和服务器数据的完整性、安全性以及远程客户端数据与后台服务器数据的一致性，有效地维护了远程数据。该系统已成功运用于库房管理之中。     

Effects of the cryogenic cooling on the fatigue strength of the AISI 304 stainless steel ground components

For environmental considerations, the substitution of the conventionally used oil-based grinding fluids has nowadays become strongly recommended. Although several alternatives have been proposed, cryogenic cooling by liquid nitrogen is the non-polluting coolant that has been given relatively more attention because of its very low temperature. In this investigation, in order to contribute to developing this promising cooling mode, its beneficial effects on the ground surface integrity of the AISI 304 stainless steel and their consequences on the fatigue lifetime are explored. Results of this investigation show that grinding under cryogenic cooling mode generates surfaces with lower roughness, less defects, higher work hardening and less tensile residual stresses than those obtained on surfaces ground under oil-based grinding fluid. These surface enhancements result into substantial improvements in the fatigue behaviour of components ground under this cooling mode. An increasing rate of almost 15% of the endurance limit at 2 × 10⁶ cycles could be realized. SEM analyses of the fatigue fracture surfaces have shown that the fatigue cracks observed on the specimens ground under cryogenic cooling are shorter (i.e., 30-50 μm) than those generated under oil-based cooling mode (i.e., 150-200 μm). The realized improvements in the surface integrity and in the fatigue behaviour are thought to be related to the reduction of the grinding zone temperature observed under cryogenic cooling, as no significant differences between the grinding force components for both cooling modes have been observed.     

钢结构设计及轻型钢结构应用

介绍了钢结构的适用范围、形式、布置要求以及进行结构分析的方法，探讨了结构软件的应用以及构件的优化选型，促进了钢结构在土木工程建筑中的广泛应用。     

Structural reliability optimization using an efficient safety index calculation procedure

The objective of this paper is to conduct reliability-based structural optimization in a multidisciplinary environment. An efficient reliability analysis is developed by expanding the limit functions in terms of intermediate design variables. The design constraints are approximated using multivariate splines in searching for the optimum. The reduction in computational cost realized in safety index calculation and optimization are demonstrated through several structural problems. This paper presents safety index computation, analytical sensitivity analysis of reliability constraints and optimization using truss, frame and plate examples.     

Pinhole density measurements of barriers deposited on low-k films

Evaluation of diffusion barrier integrity is an important issue in advanced interconnects. A diffusion barrier separating Cu from low-k must be as thin as possible and must not contain pinholes. We have developed a method for measuring pinhole density in diffusion barriers deposited on low-k materials. The method employs ellipsometric porosimetry for measuring diffusion of toluene in a porous low-k film beneath the barrier in question.     

测井相识别模型及其在东海油气勘探中的应用

文章提出一种测井相识别模型,该模型用常规测井信息,定量地确定测井相在钻遇地层中的空间位置,建立测井相。配合东海油气勘探工作,用该识别模型对苏堤构造带的钻遇地层进行了测井相分析。     

浅谈集成材用胶粘剂及其发展趋势

本文简单介绍了集成材胶粘剂的选择、种类和特点，并探讨了集成材用胶粘剂的发展趋势。     

高层建筑结构设计的分析判断与优化

对高层建筑设计而言,设计前期的初步结构方案需通过结构软件的计算分析,判断该方案是否正确与合理,从而对其进行有针对性的修改和优化。文章结合具体实例,介绍了分析判断计算结果的主要几项内容及可采取的相应优化措施,从而可以提高设计的准确性和工作效率。     

Memory of Distributed Computer Systems: Distinctive Features of Their Architectural-Structural Organization and Use

Distinctive features of architectural-structural organization and use of memory networks are considered with the aim of choosing an optimal configuration in designing distributed computer systems.     

使用MATLAB绘制原子轨道和电子云图形

绘制原子轨道和电子云图形是量子化学、结构化学研究和教学的重要内容。以氢原子为例，以MATLAB为程序开发语言，设计了一种精确、快速、简便地绘制原子轨道和电子云图形的应用程序。介绍了该程序设计的过程，给出了源程序和运行结果示例，并讨论了MATLAB的三维球坐标图形、四维图形的绘制技术。研究结果表明MATLAB是解决结构化学数值计算和数据可视化问题的一种非常有效的工具。