LINQ项目中的语言新特性

．NET语言集成查询 LINQ并非向编程语言中加入关系型或特定于XML的特性。而是采取了一种更为通用的途径，并向．NET Framework加入了可以用于所有信息源——而不只是关系型或XML数据——的一种便利的多用途查询。这种便利的特性称作．NET语言集成查询（LINQ，．NET Language Integrated Query）。     

基于Web的工业机器人3D虚拟动态监控系统

针对由Co De Sys Soft Motion控制的六自由度工业机器人,设计了一种基于OPC标准协议和Web技术的工业机器人3D(三维)虚拟动态监控系统。基于.NET平台的Windows窗体应用程序框架和My SQL数据库,采用C#语言设计了工业机器人监控客户端程序;通过Co De Sys OPC服务器配置工业机器人各关节角和运动状态为数据项,采用Web GL技术和three.js框架建立了六自由度工业机器人Web3D模型,基于机器人运动学设计了工业机器人3D动态网页。实现了工业机器人关节角和状态数据传输和存储,以及基于Web的工业机器人3D虚拟动态监控功能。     

基于web技术的医疗信息化平台建设

随着信息化进程的逐步加快,越来越多的医疗机构开始着手进行数字化建设。本文针对医院目前的情况,提出了使用.NET技术和Web服务技术构建信息集成平台的方案,对系统要求达到的目标进行分析,构建了B/S模式的三层系统结构,在.NET框架与SQL Server2005环境下编程实现系统功能。     

.NET中关键字输入时智能提示的设计与研究

设计如何在ASP.NET下实现输入关键字查询时,将其相关的热门关键字都显示出来。可以实现以输入开头的友好提示,能改善用户的体验,本设计结合Web Service将功能集成发布,利于日后任意网站开发时引用,具有一定的拓展性,同时在页面中结合了AJAX控件来查看效果,为.NET开发提供一定参考价值。     

基于数据库技术的医院管理系统设计

使用元数据技术、XML技术、ADO.NET技术设计了一个基于异构数据库集成的医院管理系统,该系统解决各异构系统之间数据的安全共享、维护等问题。     

基于OPC技术实现VB与西门子PLC的数据通讯

西门子公司为用户提供了通用的标准 OPC 接口,利用这一技术,添加 VB 的通讯控件 OPC.SimaticNET 实现对西门子 PLC 的数据访问,文章着重介绍了西门子 PLC 的客户端配置,OPC.SimaticNET 和 S7Number 控件的属性、事件和方法,并着重介绍了如何利用OPC.SimaticNET 控件进行通讯程序的设计。     

IS China 2006几多看点

“2006年中国上海国际视听集成设备与技术展”(Integrated Systems China,简称IS China)4月12日至14日在上海光大会展中心隆重开幕。此次展会吸引了来自美洲、欧洲及亚洲近150家厂商参与,包括3D Perception、AMX、美国科视数字系统、Clarity Visual SystemsDa-Lite、丹麦dnp、DIS、Draper、爱普生、Grandview、真力、Jupiter Systems、三菱、宁波GQY视讯、projectiondesign、Synelec Visual Systems、Vtron等等。集中展示了包括大屏幕、投影设备、音响设备、会议系统、监控系统、连接设备、家庭影院等目前世界最先进的视听技术…     

.NET技术及发展前景

Microsoft.NET是微软公司提出的新一代软件开发模型。.NET主要包括Visual Studio.NET开发工具,.NET平台以及.NET服务器,其技术核心是Web Services。目前微软已经推出了.NET企业服务器系列,如Windows Server 2003、SQL Server 2003和ISA Server等等。这些服务器已经完全和Visual Studio .NET结合在一起。微软还将陆续推出其他的企业解决方案,以及.NET开发工具。所以说.NET具有较好的发展前景。     

智能建筑的IBMS集成系统研究

针对于智能建筑系统集成难度大的问题，提出了一种多层集成构架体系，并研究了该框架体系的具体结构和接口技术，建立了基于OPC的三层次的集成框架模型。最后，从系统应用的角度进行了IBMS集成系统的框架结构设计，软件结构设计以及系统功能设计，实现了智能建筑各子系统功能协调，安全及高效运作。     

基于ADO.NET数据库访问技术的研究与实现

ADO.NET是基于.NET平台下的数据库访问技术,本文阐述了ADO.NET的功能、结构和对象模型,给出了基于C#.NET的ADO.NET技术访问数据库的具体实现过程,并给出了部分实现代码。     

Industry 4.0 integration with socio-technical systems theory: A systematic review and proposed theoretical model

Industry 4.0 promises the fourth industrial revolution by integration of cyber and physical worlds through technology. Industry 4.0 implementation will result in human interaction with technical system in a specialised manner. Therefore, Industry 4.0 will also be a socio (human related) and technical (nonhuman related) system in pursuit of a common goal. The purpose of this study is to suggest a mechanism to include Socio-Technical Systems Theory perspective while designing architecture for integration while implementing Industry 4.0. Building on the previous literatures on Socio-Technical Systems Theory and Industry 4.0, the article proposes bringing the two approaches together and presents a framework for integration mechanism. Successful implementation of Industry 4.0 warrants vertical, horizontal and end-to-end integration. This study suggests a design mechanism for three types of integration mechanism in Industry 4.0 by considering the socio-technical systems impact on people, infrastructure, technology, processes, culture and goals. Further, the integration is also suggested for analysis on the impact of stakeholders, economic situation and regulatory frameworks around which the operating organizations are operating. This is the first paper to propose the consideration of Socio-Technical Systems theory while designing the horizontal, vertical and end-to-end integration for sustainable implementation of Industry 4.0.     

OPC接口技术在工业自动化系统中的应用

OPC接口技术的出现使工业自动化系统中独立单元之间的互联趋于标准化，顺应了自动化系统向开放、互操作、网络化、标准化方向发展的趋势，是自动化控制系统中很有发展前景的一种数据交换标准。本文介绍OPC接口技术的相关概念，原理和运行机制，并通过一个实际的管控一体化系统的开发证实了OPC技术在石化企业管控一体化应用中的可行性和实用性。     

Stabilization/solidification of lead-contaminated soil using cement and rice husk ash

This paper presents the findings of a study on solidification/stabilization (S/S) of lead-contaminated soil using ordinary Portland cement (OPC) and rice husk ash (RHA). The effects of varying lead concentrations (in the form of nitrates) in soil samples on the physical properties of their stabilized forms, namely unconfined compressive strength (UCS), setting times of early mixtures and changes in crystalline phases as well as chemical properties such as leachability of lead, pH and alkalinity of leachates are studied. Results have indicated that usage of OPC with RHA as an overall binder system for S/S of lead-contaminated soils is more favorable in reducing the leachability of lead from the treated samples than a binder system with standalone OPC. On the other hand, partial replacement of OPC with RHA in the binder system has reduced the UCS of solidified samples.     

Jet mill grinding of portland cement,limestone, and fly ash: Impact on particle size,hydration rate,and strength

While the majority of commercial ordinary portland cement (OPC) is ground using a ball mill or a vertical roller mill, other industries have shown that jet mill grinding can be an alternative approach for grinding materials. This paper investigates the potential application of jet mill grinding for two systems. The first system is a blend of OPC and 15% limestone, and the second system is a blend of OPC and 40% fly ash. It was observed that when jet mill grinding is used, the average particle size of the powders is decreased to approximately 4 μm or less with a narrower particle size distribution than that achieved using ball milling. In addition to evaluating the size and shape of the particles obtained from the jet mill grinding process, this paper focuses on evaluating, using isothermal calorimetry, the effect these changes in particle size and distribution have on the extent and rate of hydration as well as their effect on the compressive strength of cement pastes or mortars.This study also investigated differences between inter-grinding and blending separately ground materials to form an OPC/limestone mixture. Both inter-ground and separately ground OPC/limestone mortars demonstrated an accelerated hydration at early ages accompanied by an increase in early age strength. This appears to be primarily due to the increased surface area of the finer particles that provides more available surface for the hydration reaction. The inter-grinding appeared to be more effective than grinding the materials separately because an improved graded particle size distribution was obtained. The inter-ground OPC/limestone mixture shows accelerated initial hydration at water to powder ratios (w/p, where powder = cement + limestone) of 0.50 and 0.35 when compared with the samples before grinding. At the lower w/p of 0.35, the OPC/limestone mixture appears much more efficient. In the OPC/fly ash mixture, jet mill grinding also accelerates the rate of hydration and strength development.     

通用热力对象建模与控制仿真平台设计

系统地介绍了自主开发的复杂可视化仿真平台的构成及其主要核心技术,例如共享内存设计、多编译器嵌入、多进程多任务设计等,并且还介绍了第三方图形开发平台VG以及OPC通信技术.以水位三冲量调节系统为例进行了对象建模与控制,通过OPC通信协议,实现Matlab设计的方案对仿真平台对象模型的控制.该单级三冲量控制得到了较好的控制效果,验证了本平台的功能有效性,同时也为大型复杂热力系统的仿真建模提供了一种新的低成本、高效率的设计思路.     

Microprocessor controlled tape motion

The capstan control system of a high performance digital tape drive starts and stops tape with accelerations of about 500 g's. A microprocessor based control system is now being implemented on STC's 4500 Tape Systems to attain accurate tape speed control with little high frequency variation. Improvements made possible by the processor include controlling rate of change of motor current and drastically reducing start current when a "GO" command is received during a decelerate operation to avoid exciting a torsional resonance. Other improvements are mode-controlled digital error integration for long term accuracy and stop-lock stability enhancement by digital-gain switching.     

A conduction calorimetric study of early hydration of ordinary Portland cement/high alumina cement pastes

Conduction calorimetry was applied to an investigation of the early hydration of ordinary Portland cement (OPC)/high alumina cement (HAC) pastes. Three different rate of heat-evolution profiles were observed, depending on the HAC/OPC ratio. Relevant processes affecting heat development include ettringite formation, HAC and OPC hydration. Results from SEM examination and X-ray diffraction studies are also presented. An acceleration of OPC hydration was observed in pastes containing less than 12.5% HAC. A similar acceleration effect on HAC hydration was also obtained with the addition of OPC. A large amount of ettringite was formed and OPC hydration delayed in the pastes containing 15%–30% HAC. The latter could be one of the factors attributed to poor strength development in these HAC/OPC systems. Early hydration mechanisms of OPC/HAC systems are also discussed. This revised version was published online in November 2006 with corrections to the Cover Date.     

数据访问对.NET Web应用程序性能测试的影响

针对数据库和XML文件不同数据源类型及数据的不同访问机制对.NET Web应用程序性能测试的影响进行分析,通过ACT测试工具得出了实例系统的性能测试数据,说明数据访问对.NET Web应用程序性能测试影响的主要因素.     

Superior photocatalytic NOx removal of cementitious materials prepared with white cement over ordinary Portland cement and the underlying mechanisms

This study presents experimental results in an attempt to explain why photocatalytic cementitious materials prepared with white cement (WC) had superior photocatalytic NO_x removal performance than those prepared with ordinary Portland cement (OPC). The UV–Vis diffuse reflectance spectra (DRS) of dry WC and OPC demonstrated that OPC had a stronger light absorption ability. And electrochemical impedance spectroscopy (EIS) analysis revealed that OPC incurred higher charge transfer resistance on the inter-surface of OPC and TiO₂. Moreover, the OPC/P25 dry mixtures displayed a relatively lower photoluminescence (PL) intensity at 420 nm. The addition of iron oxide (Fe₂O₃) in WC caused a decrease in NO_x removal, a boost in light absorption, an increase in the resistance of charge transfer, and a reduction in PL intensity. Collectively, the relatively poor performance of OPC/P25 mixtures in photocatalytic NO_x removal is due to a combination of stronger light absorption and lower charge separation caused by OPC.