广西洛东水电厂增机扩容可行性设计

通过对洛东水电厂的来水量、地质和经济指标等技术资料的分析,认为采用灯泡贯流式机组扩大其装机的容量是可行的。并介绍了洛东水电厂增机扩容的可行性设计情况。     

百色水库和龙滩水库淹没土地补偿概算单价比较

通过对百色水利枢纽和龙滩水电站土地补偿概算单价进行比较分析,找出控制土地补偿的关键因素,对 制定广西实施《大中型水利水电工程征地补偿和移民安置条例》办法和编制两工程调整概算,提供参考。     

灯泡贯流式机组发电机冷却装置技术改造方式的探讨

灯泡贯流式发电机组直径小,转速低,发电机的通风冷却是一个难点。通过对京南、马骝滩、石面坦及南津渡等水电站的发电机运行过程中出现的温升过高,定子线棒绝缘受损等问题的分析,提出了解决的措施与改进方案,并对灯泡贯流式机组冷却系统的设计提出了建议,可供参考和借鉴。     

有杆泵抽油系统可靠性分析

抽油机井有杆果采油装置检泵故障数据的特点在于相邻两次检泵间隔之间的时间并非总是来自同一总体，可能有某种趋势的变化。通过对故障数据的趋势性检验，可验证其对某一随机过程模型的适应性，从而判定某一口井或某一批工况大致相同油井的运行可靠性，实现对生产井运行可靠性的定量评估。还通过实例说明了有杆泵抽油系统检泵故障数据的可靠性分析方法。     

An integrated automatic test data generation system

The Godzilla automatic test data generator is an integrated collection of tools that implements a relatively new test data generation method—constraint-based testing—that is based on mutation analysis. Constraint-based testing integrates mutation analysis with several other testing techniques, including statement coverage, branch coverage, domain perturbation, and symbolic evaluation. Because Godzilla uses a rule-based approach to generate test data, it is easily extendible to allow new testing techniques to be integrated into the current system. This article describes the system that has been built to implement constraint-based testing. Godzilla's design emphasizes orthogonality and modularity, allowing relatively easy extensions. Godzilla's internal structure and algorithms are described with emphasis on internal structures of the system and the engineering problems that were solved during the implementation.Parts of this research were supported by Contract F30602-85-C-0255 through Rome Air Development Center while the author was a graduate student at the Georgia Institute of Technology.     

适用于仿真工业控制系统的软件包

本文提出的仿真软件包具有丰富的数学运算功能、控制算法功能、逻辑运算功能及图形编辑能力．软件包结构上充分体现了模块化的设计思想，而在功能及组态方法上又十分类似于分散控制系统相应的功能。使用该软件包，可方便地对各种典型的工业控制系统特别是由微处理机组成的分散控制系统进行仿真研究。     

适用于稠油开采的游梁式抽油机设计分析

在稠油开采中,抽油杆在液体中运动时,所受到的摩擦阻尼力很大,有时高达几十千牛。上冲程时,该力有加大悬点载荷的作用;下冲程时,该力使抽油杆下行困难,甚至悬点载荷为零。为了开采稠油,必须根据其特点设计适应的游梁式抽油机。文章分析了稠油用抽油机的受力特点,提出了该类抽油机的设计要求。     

Filler-induced failure mechanism in plastic-encapsulated microelectronic packages

Based on empirical data, the present work provides a model to prevent filler-induced reliability degradation in plastic-encapsulated LOC (lead-on-chip) packages. According to the model, the maximum size of the silica fillers included in the plastic package body should be smaller than one half of the inter-distance between the device and its overlying lead-frame. In particular, it is shown in the model that the spherical silica particles, which are sometimes trapped in the space between the top surface of the device and the bottom of the lead-frame during the encapsulating process, can induce huge compressive stress on a specific site of the integrated circuit pattern due to the thermal shrinkage of the plastic package body. Further, the present model suggests that tiny fillers squeezed beneath a large trapping filler might directly attack the brittle layer of the device pattern because the compressive force from the large filler particle can develop into huge compressive stress due to the reduced load-carrying area.     

数据采集与处理系统芯片-ADuC845及应用

随着嵌入式系统的发展，模拟信号处理单元与MCU正逐步融为一体，数据采集与处理系统芯片-ADuC845是这一融合的具体体现和产物。现对ADI公司的ADuC845芯片及其特性、应用作详细介绍。     

水轮发电机转子动平衡的时-频方法

提出了一种基于时域分析和频域分析的动平衡方法，应用于水轮发电机转子的动平衡。在这种时-频动平衡方法中，用时域分析来确定不平衡力的相位，用频域分析来确定不平衡力的大小。该方法具有平衡精度高、起机次数少的优点。用1台300MW水轮发电机转子的现场试验数据验证了该方法的准确性和适用性。