PLC控制在炼钢上料、卸料系统中的应用

介绍了炼钢上料、卸料综合运行系统的新方法，以及运用PLC技术在新工艺过程中的实现方法和控制原理。实践表明该系统工作可靠、自动化程度高。     

基于Siemens PLC的城市供水调度系统的设计

本文介绍了一套基于Siemens S7—200、S7—300和Simatic WinCC的城币供水控制系统的设计。饭糸貌以水厂蓄水池水位及供水的出水口压力为控制对象，对远程水源地各水井泵的引水及变频泵的对外供水进行总体协调控制，使其合理、节能、高效地运行。该系统的应用大大提高了远程输水的自动化程度，保证了供水的质量。     

PLC在高炉自动监控系统中的应用

介绍了高炉自动监控系统的组成情况,详细论述了PLC在系统中的配置及使用情况,以及PROFIBUS总线的构成,通过自动监控系统功能的实现保证了高炉炼铁生产的顺利进行。     

DTW算法的研究和改进

对语音识别中的DTW算法进行了研究,提出了一种改进算法,并用实验数据进行了验证。此算法在识别度下降可接受的范围内,有效地减少了识别的时间。     

Evaluation of fundamental and functional properties of natural plant product powders for direct compaction based on multivariate statistical analysis

Direct compaction (DC) is the preferred choice for tablet manufacturing; however, its application in natural plant product (NPP) tablets is still extremely immature. In this study, NPP powders prepared by three commonly used methods were evaluated on their suitability for DC. Extensive characterizations of their physical properties were performed. Multivariate statistical analysis was utilized to explore the influence of preparation technology on the properties of NPP powders and identify the dominating factors that influence their DC properties. The results demonstrated that (i) the 27 kinds of model NPP powders selected randomly in this study could to some degree represent most NPP powders used in actual production; (ii) ～81.5% of the NPP powders exhibited both poor compactibility and flowability, and none of the NPP powders could be compacted into tablets via DC; (iii) the physical properties of NPP powders prepared by direct pulverization were significantly different from those of extracted ones, while there were no significant differences between the water and ethylalcohol extracted ones; and (iv) the DC properties of NPP powders could be improved through controlling some physical properties (e.g., density, particle size, morphology, and texture parameters) reasonably. Overall, this study comprehensively evaluated the current status and application of NPP powders in DC, and is significant in facilitating the development and modernization of NPPs through DC.     

基于MC9S12DP256B的汽车防抱死系统设计

本文介绍了一种基于MC9S12DP256B的汽车防抱死系统设计,该系统采用特殊的双CPU结构,既可完成汽车防抱死制动也可实现故障诊断,并可通过CAN通信传输故障码。     

基于WiMAX网络的入网技术研究

WiMAX是一种基于标准的技术，具有标准化、技术成熟、传输速度快、覆盖范围广、良好的抗雨衰性能、扩容性强，组网灵活的优点，已成为当前运营商宽带城域网建设“最后一公里”理想的无线接入手段。文章给出了WiMAX网络详细的入网过程，包括网络发现与选择、鉴权注册、业务流和数据通道的建立，并给出了WiMAXN络的自举过程及每个过程中详细的通信流程图。     

隧道现场实验监控系统的设计与研究

为了对隧道现场监控进行模拟调试,设计了一个实验室隧道现场监控模拟系统.详细说明了该隧道现场监控系统的冗余网络结构和组态,并简要介绍了PLC站点的软件功能和设计原则.现场实验监控系统为PROFIBUS总线技术的应用和隧道监控系统的现场级模拟调试提供了一个很好的实验平台.     

西门子PCS7系统在焦炉干熄焦的应用

详细阐述了基于现场总线PROFIBUS DP的西门子PCS7过程控制系统在酒钢焦化厂3^#、4^#焦炉干熄焦控制系统的软件功能、硬件功能及应用,总结了系统的特点并就调试过程出现的问题提出了建议。     

高Nb-TiAl基合金锻压饼材的拉伸性能

用自制的拉伸夹具测度子两种高Nb-TiAl基合金的室温和高温拉伸性能,并对实验结果进行了分析讨论,结果表明,双态组织片层组织有更高的强度,这符合一般TiAl合金的强度规律,且两种合金的室,高温强度均比普通TiAl合金的强度高。