用CIN实现LabVIEW与通用数据采集卡的连接

文章以一块通用数据采集卡为实例详细介绍了如何采用CIN(Code Interface Node)节点实现通用数据采集卡与LabVIEW开发环境的连接。     

基于DLL方式的C++Builder和CLIPS混合编程开发专家系统

介绍了混合编程开发专家系统的一般方法及其优越性,详细讨论了C^ Builder调用VC^ 格式的动态链接库的实现技术与步骤,利用修改后的能兼容C^ Builder的CHPS动态链接库,实现了如何在C^ Builder应用程序中启动CLIPS以完成专家系统的推理,并把结果返回给C^ Builder应用程序的过程,对于缩短专家系统开发周期、提高开发效率具有重要意义。     

拉刀CAD系统的研制

针对东风汽车公司拉刀设计的特点,运用C Builder开发了FoxPro数据库,并对AutoCADR14进行了二次开发,研制了拉刀系统。介绍了该系统的总体设计及其各组成部分,并详细讨论了系统开发中关键技术。     

基于质量功能配置的软件系统开发

介绍了质量功能配置设计方法 ;基于该方法 ,以 Windows环境下的 Power Builder语言为工具 ,对质量功能配置中的质量屋开发了可视化的软件系统 ,详细介绍了软件系统并给出了实例     

离心泵故障诊断专家系统的设计

详细介绍了开发离心泵故障诊断的专家系统的方法,在SQL Server数据库中创建离心泵故障的知识库和全局数据库,用专家系统工具Clips建立故障规则和推理机,利用Windows XP平台,研究了将Clips的核心推理机嵌入到C++Builder中的方法,详细介绍了实现专家系统的设计理论。     

基于S3C2410开发平台的Windows CE.NET操作系统定制

基于Samsung公司的S3C2410处理器构成的硬件平台,利用Platform Builder4.2开发工具,详细介绍了Windows CE.NET操作系统的定制过程。     

基于C＋＋ Builder 6.0的上位机与欧姆龙PLC串行通信设计

详细介绍了欧姆龙可编程控制器与工控机进行串行通信连接的硬件配置、上下位机通信协议,重点阐述在C＋＋Builder 6.0开发环境中如何利用VB控件MSComm进行串口通信的实现过程,最后给出读写欧姆龙PLC的IO域的详细通信程序。     

开发跨平台桌面应用的探讨

Electron结合了Chromium、Node.js和用于调用操作系统本地功能的API,能够使用纯JavaScript来创建桌面应用,具有跨平台、开发高效、模块隔离等技术优势。现分析了Electron的运行原理和技术优势,并通过案例说明了利用Electron来开发桌面应用软件的方法。     

CAI教学软件的设计与开发

以“二次接线”中的“中央信号”开发为例，详细叙述了运用C＋＋Builder5计算机语言进行CAI软件开发的基本流程、脚本设计和编程思路。。     

基于Node.js平台物联网Web服务的设计与实现

利用面向服务架构(SOA)的优势,可以解决开发人员与用户在物联网环境中面临的难题。提出了基于Node.js平台的Web服务设备配置文件(DPWS)实现方法,即Node.DPWS,Node.DPWS可在异构节点(包括资源有限的设备)上部署轻量级、高效且可扩展的Web服务。研究结果表明:通过在嵌入式设备上进行性能评估比较,Node.DPWS的性能优于WS4D-JMEDS工具包,Node.DPWS设备其平均响应时间为24.44ms,比SE和CDC快66.3%和53%。在查询Node.DPWS设备时,在12.22 s内即可完成500个请求的基准测试。Node.DPWS设备的响应速度更快,消耗内存更低。为实现新颖、更优服务物联网及其扩展性,可用性,互操作性提供技术参考。     

A practical guide to the measurement of structure phases and magnitudes by three-beam convergent beam electron diffraction

The practical details for the direct measurement of structural phases and magnitudes from centrosymmetric crystals using three-beam convergent beam electron diffraction patterns are given. These details are presented as a step-by-step guide for easy implementation. Each step is illustrated with worked examples from alpha-Al(2)O(3). Twenty-nine measurements of 6 independent three-phase invariants and 87 measurements of 10 independent structure magnitudes have been made.     

新型冲击驱动器及其在扫描隧道显微镜中的应用

提出了一种基于压电陶瓷的新型冲击式微位移驱动器，该驱动器利用摩擦力和惯性原理使目标产生步进式的微位移。其特点是最小位移可达几纳米，并在几纳米至几微米之间连续可调，运动范围几乎不受限制，具有实用的运动速度，系统结构简单，操作与控制方便，因而可能在微纳米技术中得到广泛应用。阐述了该驱动器的工作原理和机构设计，给出了它在扫描隧道显微镜中用于探针一样品间的自动定位控制的应用实例，得到了理想的结果。     

One step positive approach for sheet metal forming simulation based on quasi-conjugate-gradient method

In one step inverse finite element approach, an initial blank shape is normally predicted from the final deformed shape. The final deformed shape needs to be trimmed into a final part after stamping, the trimmed area, therefore, needs to be compensated manually before using one step inverse approach, which causes low efficiency and in consistency with the real situation. To solve this problem, one step positive approach is proposed to simulate the sheet metal stamping process. Firstly the spatial initial solution of one step positive method is preliminarily obtained by using the mapping relationship and area coordinates, then based on the deformation theory the iterative solving is carried out in three-dimensional coordinate system by using quasi-conjugate-gradient method. During iterative process the contact judgment method is introduced to ensure that the nodes on the spatial initial solution are not separated from die surface. The predicted results of sheet metal forming process that include the shape and thickness of the stamped part can be obtained after the iterative solving process. The validity of the proposed approach is verified by comparing the predicted results obtained through the proposed approach with those obtained through the module of one step inverse approach in Autoform and the real stamped part. In one step positive method, the stamped shape of regular sheet can be calculated fast and effectively. During the iterative solution, the quasi-conjugate-gradient method is proposed to take the place of solving system of equations, and it can improve the stability and precision of the algorithm.     

三自由度平台控制特性研究

介绍一种由大搭接量电液比例方向阀闭环控制的三自由度模拟舰船平台。对该平台的结构、电气控制及控制软件作了详细介绍。研究结果表明，充分利用计算机控制的特性及软件资源，由大搭接量电液比例方向阀构成的闭环控制系统，也可以获得良好的控制性能。     

PCI接口的PLX9052实现

介绍在PCI接口开发中应用广泛的PLX9052芯片的EEprom配置、地址映射、配置寄存器和本地寄存器的设置及其Windriver驱动程序的开发步骤。     

基于三坐标测量机的数据采集技术

数据采集是逆向工程建模的关键环节，测量数据的可靠性决定建模的效果和效率。以三坐标测量机为例，介绍逆向工程中利用三坐标测量机进行数据采集的基本过程。     

压力开关自动调整测控系统的研究

介绍了气泵压力开关的性能参数自动调整测控系统,该系统采用工控机系统控制步进电机来实现对气泵开关压力弹簧位置的调整以及压力信号的设置.系统中的各种信号通过接近开关、压力继电器和电磁阀送给工控机,再由工控机发出工作指令.其中对步进电机的选用和控制进行了详细分析.结果表明,采用该控制系统可大大提高气泵开关自动检测设备的工作效率.     

克服不可定节点影响的区分定位方法研究

随机布设的传感器网络难免存在一些位置无法唯一确定的节点.已经发现不可定节点与可定点一起进行定位解算会导致可定点定位精度下降.为了解决这一问题,提出区分定位(differentiated localization,DL)设想,其中可定节点进行集中定位解算而不可定节点则单独进行最小二乘估计.针对现有的可定性判断准则RR3P(redundant rigid 3 path)和RR-3P(redundantlyrigid-3 path)计算复杂度高的问题,提出基于度数的可定性判断准则3D(3 degree).仿真分析和实验验证表明,可定性判断准则3D与RR3P和RR-3P下网络的定位性能相差无几,而计算机复杂度从O(N3)降低到O(Nlog N).在3D准则下,区分定位策略能够使得网络的整体定位精度提高至少50％.     

智能型消防控制系统的研究与实现

介绍了一套基于新行业标准而开发的智能型消防控制系统，阐述了如何使用单片机控制技术来开发具有自动运行、故障转换、定时自动巡检功能、故障查询功能以及远程监控能力的消防控制系统，并结合所开发的项目详细阐述了系统的软硬件开发。     

Consideration of geometric nonlinearity in rigid-plastic finite element formulation of continuum elements for large deformation

A rigid—plastic finite element formulation for the continuum elements employing the geometric nonlinearity during an incremental time step is presented. In sheet metal deformation, the displacement for each step is considerably large even though the effective strain increment is very small. For such large displacement problems, geometric nonlinearity must be considered. In the elastic—plastic finite element using continuum elements, general incremental formulations to include the geometric nonlinearity are available. However, in the conventional rigid—plastic finite element analysis using continuum, elements, the geometric nonlinearity has not been considered properly during an incremental time step. In this paper, in order to incorporate geometric nonlinearity to rigid—plastic continuum elements during a step, the convected coordinate system is introduced. To show the stability of strain distributions by the effect of geometric nonlinearity according to incremental step size, two sheet metal forming processes, stretching and deep drawing process, are analysed with various step sizes. Then the computed results using the derived equation are compared with those obtained without considering geometric nonlinearity.