ZJF-1型动力电缆载波设备及其在采煤机上的应用

介绍了ZJF - 1型动力电缆载波设备的组成、工作原理、FSK调制技术及PLD器件的应用等。并针对现场使用情况提出改造方向。     

网络图自动生成系统设计与实现

文章针对当前项目管理软件中网络图绘制的缺陷,对网络图自动生成的算法作了新的探索,提出了新的算法并开发了自动生成系统。生成的网络图逻辑关系清楚,布局合理,直观清晰,对改进项目管理软件在此方面的不足有重要意义。该算法亦有一些遗留问题需进一步研究。     

Computer-aided design integration of a reinforced vibration isolator for electronic equipment’s system basedon experimental investigation

Electronic equipment’s system is always manufactured as a superprecision system. However, it will be used in harsh environment. For example, the computer in moving vehicles will be acted by vibrations. The objective of this paper is to provide a systematic investigation to test and computer-aided design of the vibration isolator for protection of electronic equipment’s system in harsh vibration environment. A micro-oil damping vibration isolator is designed and manufactured through coupling the oil and spring by ingenious tactics. The structure of the oil damping vibration isolator can achieve circulating oil damping function with an inner tube and an outer tube (some orifices are manufactured on upside and underside of the inner tube). The dynamics of the key model machine is systematically investigated. Based on the test, a nonlinear dynamic model for the vibration isolator is presented by analyzing the internal fluid dynamic phenomenon with respect to the vibration isolator. The model considers all the physical parameters of the structure. Comparisons with experimental data confirm the validity of the model. In the other, the model is integrated by introducing normalization measure. The normalization model shows the actual physical characteristics of the oil damping vibration isolator by considering quadratic damping, viscous damping, Coulomb damping, and nonlinear spring forces. An approximate solution is deduced by introducing harmonic transform method and Fourier transform method. Therefore, a parameter-matching optimal model for computer-aided design of the vibration isolator is build based on approximate solution. An example confirms the validity of the computer-aided design integration.

Two posture analysis approaches and their application in a modified rapid upper limb assessment evaluation

This paper presents two posture risk quantification methods: first, an event-based method where the most common and the worst postures are estimated in a task; second, a time-based method where posture distributions are calculated from random samples of observed postures in the task. A 'click-on-screen' posture data entry method was developed for the time-based posture analysis method to make the observation process easier and to reduce possible posture categorization bias. Both methods were used to quantify various work posture parameters among a study cohort of 733 subjects from a prospective epidemiological study of upper extremity musculoskeletal disorders. Composite posture indices using a modified Rapid Upper Limb Assessment (RULA) method were also computed using data obtained by the two posture analysis methods. Results showed that both methods were able to distinguish jobs with large differences in certain posture measures. However, they did not produce the same results and could not be used interchangeably. Risk evaluation criteria should be developed, either for specific posture parameters or as a composite index, with a well-defined postural analysis method, so that users can follow exact procedures and obtain comparable results. The event-based method is easy to use and may suit practitioners better, while the time-based method adds more information to the measurement and may suit users who want more detailed information about posture exposure.     

一种检测绝缘纸板微水分的电容式传感器

开发一种用于检测变压器绝缘纸板微水分的电容式传感器 ,该传感器通过感应绝缘纸板的介电常数在其干燥过程中的变化而用于在线实时检测。它灵敏度高、温度漂移小、便于安装和信号传送 ,其输出信号经处理后 ,可由微机处理并显示水的质数分数。介绍了传感器的工作原理、结构形式及相关系统。     

CAN总线技术在汽车视觉检测系统中的应用

本根据汽车白车身视觉检测站工作的特点和需要,对基于CAN总线的多主结构分布控制系统进行了研究,并组建了基于MC68HC05X16单片机和微机的控制网络,中对CAN总线物理层接口、拓扑结构、通令协议及规程等作了详细的说明。     

拙政园虚拟巡游系统

介绍了拙政园动画及虚拟系统的形成过程,以及如何在现有的软硬件设备下,将虚拟现实辅助于建筑方案中。     

供应链集成化模型与优化

本文建立了一个包括供应商、制造商、销售商 在内的集成化模型,这一模型含有线性状态方程和神经网络非线性模型,提出了库存成本、 供应成本、生产水平等在内的供应链目标函数和约束条件．对于供应链集成化模型采用模拟 退火方法进行优化,并以辽化公司为背景进行了初步条件的仿真工作．     

8088/8086汇编语言中宏的编制和使用

介绍8088／8086汇编语言中宏的编制和使用方法以及宏与子程序的区别。     

基于MAX263的带通跟踪滤波设计

介绍了MAX263滤波芯片性能,分析了其软件设计方法及其工作原理,结合锁相环频率跟踪原理设计了针对转子不平衡量电信号的带通跟踪滤波器,实验证明该方法滤波效果十分明显,能够有效滤除干扰信号,且电路简单,具有很高的应用价值。