Dbxtool: A window-based symbolic debugger for sun workstations

Dbxtool is a window- and mouse-based debugger for C, Pascal and FORTRAN programs running on Sun workstations. Its use of the mouse as the primary input mechanism eliminates the need to type variables, line numbers, breakpoints and most commands. Its multiple windows provide several qualitatively different perspectives on the debugging problem. Compared to the Unix 4.2 BSD dbx from which it is derived, it has been extended with the abilities to debug multiple-process programs, already-running processes, and the Sun Operating System kernel.     

Using statistics to make expert systems “user-acquainted”

The user-acquainted feature collects user-specific data regarding the types of advice that have been sought over time and uses this historical information to update the probabilities to affect the firing of its rules and the ordering of the recommendations of the expert system. These updates are done on auser-specific basis so that the expert can more closely emulate a true expert by providing more informed advice. One example of a place where evidence suggests that such a feature would be useful is in the area of debugging of computer programs, especially in support of novice programmers who tend, as individuals, to commit similar classes of errors over time, but who, as a group, commit very different types of errors. We conjecture that the user-acquainted feature, which can keep track of the tendencies of the users and take them into account in the evaluation of diagnostics, will be more effectiveand efficient in determining the fault. In this paper, we discuss the statistical analyses necessary to implement this feature in an expert system for debugging errors in SAS.     

一起电机软起动器调试争端的原因分析和解决处理

官地水电站竹子坝人工骨料生产系统由水电八局承建,其细碎设备供电电源电气设计、施工采用总承包方式,但细碎设备电机的软起动器由业主采购,供货厂家美卓公司负责软起动器的选型设计和安装调式.在调试过程中出现了少见的故障现象,引发了美卓厂家和水电八局之间长达两个多月的争议.对故障原因进行了仔细分析,提出了详尽的解决处理方案,并由此对工程建设管理作出了深层反思,单对其他工程建没有一定的借鉴意义.     

Eclipse Support for Using Eli and Teaching Programming Languages

This demonstration will show Eclipse plugins developed at Macquarie and Colorado to support the Eli Language Processor Generation system and to enhance teaching of programming language concepts and implementation techniques. The plugins support exploration of programming language semantics, integrated development in the Eli system, and high-level observations of compiler execution.     

Incremental generation of LR parsers

Implementation of a new compiler usually requires making frequent adjustments to grammar definitions. An incremental technique for updating the parser tables after a monor change to the grammer could potentially save much computational effort. More importantly, debugging a grammar is made easier if the grammar is re-checked for correctness after each small change to the grammar. The basic design philosophy of an incremental parser generator, and incremental algorithms for LR(0), SLR(1) and LALR(1) parser generation are discussed in this paper. Some of these algorithms have been incorporated into an implementation of an incremental LALR(1) parser generator.     

飞机喷漆机库风平衡调试施工技术

如今国内航空产业飞速发展,适用于不同飞机机型的喷漆机库将会逐步建造。喷漆阶段对喷漆大厅内的气体流态要求非常高,要求气流在落差较高空间内均匀且稳定地送至飞机舷窗部位并被下方的排风口排出,同时保持总送排风风量,使喷漆大厅具备微负压。结合常规风平衡调试方法和美国波音公司喷漆机库风平衡调试方法以及飞机喷涂技术要求,经过多次试验并分析,总结介绍了系统性的风平衡调试方案,为后续类似喷漆机库的风平衡调试工作积累了经验。     

电视频道滤波器的小型化设计

阐述了螺旋滤波器的工作原理,分析了影响螺旋滤波器体积的因素,主要包括工作频率、插入损耗和数学模型,最后给出了电视20频道滤波器的小型化设计。     

基于Zigbee技术的家用无线网关的设计

针对现代社会对信息获取便捷度和家庭网络化的要求,设计了一种可以组织家用电器成小型网络的家用网关。该网关采用Z igbee技术和嵌入式系统相结合的设计方案,采用了自行设计的Z igbee协议栈结构使其适合嵌入式系统,达到了连接组网和交换信息的能力。     

关于新颜色开发过程的探讨

对长城汽车公司新颜色开发过程中的经验及问题进行了总结。主要探讨了新颜色的前期规划、新颜色涂料(包括高、低温涂料)在现有生产线基础上的开发、同体系前提下新颜色涂料的配套性能试验、新颜色实车试喷及现场调试、车身颜色与保险杠等塑料件的匹配以及开发过程中对各供应商的管理协调等方面。     

智能变电站继电保护二次安全措施规范化的建议

目前,我国加快了智能变电站的建设步伐,随着智能变电站投运数量的增加,继电保护作业方式正发生根本性变化,二次系统内工作时的安全性也越来越受到重视。从智能变电站基本结构出发,对比智能变电站数字化保护与常规微机保护结构上的区别,分析传统二次安全措施向智能变电站二次安全措施产生的变化,重点探讨智能变电站继电保护二次安全措施的具体实施方法。最后对智能变电站继电保护二次安全措施规范化提出几点建议。