蓝牙技术在某型飞机机载火控故障诊断系统中的应用研究

蓝牙技术是一种短距离无线通信技术,具有低成本、低功耗、灵活、快速、抗干扰能力强等特点,目的是取代终端的连接电缆.为提高部队的作战效能,采用蓝牙技术和计算机测量与控制技术,研制了机载火控故障诊断系统;该系统在实际应用中取得了良好效果,并具有诊断结果准确、自动化程度高、工作稳定可靠、操作简便、易于转移和维护等优点,为技术人员进行机载火控系统的性能检测与故障诊断提供了便利.     

~（60）Co辐照对聚四氟乙烯表面润湿性的影响

研究了具有低表面能的氟聚合物聚四氟乙烯（ＰＴＦＥ），经６０Ｃｏγ射线辐照后表面状态的变化，以及其对液体介质蒸馏水的润湿性。较详细地论述了辐照后表面粗糙度、结晶度以及表面化学基因等不同因素对ＰＴＦＥ表面润湿性的影响。通过对ＰＴＦＥ及其表面的红外、Ｘ光衍射，表面粗糙度的分析，弄清了辐照后ＰＴＦＥ表面化学基团的改变对有机氟聚合物表加的润湿性影响很大，而粗糙度和结晶度的变化对润湿性影响较小。     

Preparation of Iron Filler-Based Photocomposites and Application in 3D Printing

The introduction of metallic fillers to polymers via the photopolymerization approach can endow the composite materials with some unique properties, but the relevant research is still scarce due to the issue of light penetration and inner filter effect. Herein, for the first time the fabrication of photocomposites based on fine iron powder (i.e., a typical kind of metallic filler) is reported in this work. The free radical polymerization of two different acrylate monomers, poly(ethylene glycol) diacrylate and trimethylolpropane triacrylate, is performed in the presence of iron filler under mild conditions (i.e., light emitting diode (LED)@405 nm irradiation at room temperature under air). And the real-time Fourier transform infrared spectroscopy reveals remarkable photopolymerization kinetics of acrylates with high final conversions and fast polymerization rates despite the increasing contents of iron filler in the composites. Interestingly, the 3D printing technique is applied to the iron filler-based composites to produce tridimensional patterns with excellent spatial resolution. This work not only paves the way for the investigation of photocomposites based on metallic fillers through photochemical methods, but also broadens the potential application prospects.     

汽车拉杆总成试验台计算机测控系统研究

以汽车转向拉杆球头销疲劳试验台为应用背景,阐述了如何采用VB6.0编程语言实现西门子S7-200系列PLC与上位计算机的串行通信,完成了PLC与计算机之间的数据交换,为最终实现计算机对PLC所连接的试验台工作状态的实时监控提供了通信支持.     

聚氨酯/聚四氟乙烯耐磨防腐涂层表面结构的研究

研究了以聚氨酯和γ辐照的聚四氟乙烯组成的耐磨防腐涂层的耐磨寿命及耐水性。用付里叶红外和ESCA等分析了涂层表面的化学结构及形貌,揭示了涂层表面富集的聚四氟乙烯与聚氨酯树脂形成牢固的结合时,涂层具有良好的耐磨性及抗腐蚀性.     

基于UML的考试分数录入系统的设计

设计了考试成绩录入系统,写出了登分和成绩处理用例.画出了登分用例的顺序图,给出了一个类的设计.     

基于GPRS的远程监控系统中监控中心网络数据通信实现

基于GPRS的远程监控系统中,监控中心实现与前端采集系统的网络数据传输是整个系统的重要的组成部分。本文提出了采用套接字（socket）,基于TCP/IP协议实现远程数据收发的办法。简要介绍了基于GPRS的远程监控系统的组成功能,详细论述了基于套接字的编程技术,给出了基于Win32控制台的部分源码。     

基于GPRS的远程监控系统掉线重拨技术实现

本文基于GPRS的远程监控系统中,通信链路为GPRS网络,虽然GPRS登录Internet后具有始终保持在线通道,但也会因网络故障、信号不强、闪电等原因,而出现下网即掉线,为保证系统的可靠稳定的运行,本文提出了解决上述问题的软件实现办法。利用＂心跳＂程序,定期检查联网情况,一旦出现掉线,及时自动重新连接网络,保证远程采集前端与监控中心的稳定连接。     

城市轨道交通直流馈线电缆在线监测方案设计与应用

在城市轨道交通供电系统中,直流馈线电缆若持续存在电流泄漏,可能会烧坏电缆,甚至发生短路故障.设计了一种测量直流馈线电缆泄漏电流的方案,通过将霍尔元件嵌套在馈线柜的出线电缆,利用霍尔元件采集数据,并通过录波装置借由交换机连接到无线路由器,把采集到的数据实时上传到云服务器,通过网页端进行数据的访问及处理分析.该方案已经成功应用于广州地铁一号线坑口车辆段,经过运行及测试,在线监测系统运行稳定,具有良好的监测效果.     

Poly(N-isopropylacrylamide)/mesoporous silica thermosensitive composite hydrogels for drug loading and release

Temperature-sensitive hydrogels are attracting increasing attention for controlled drug delivery. However, achieving high drug loadings and sustained drug release remains challenging. Herein, we describe the successful synthesis of a series of novel temperature-sensitive poly(N-isopropylacrylamide) (PNIPA)/mesoporous silica nanoparticles (MSN) hydrogels by physical crosslinking of NIPA with MSN. The external and internal structures, temperature sensitivity, drug-loading capacity, and blood compatibility of the PNIPA/MSN composite hydrogels are studied. Results show that MSN addition improved the network structure and adjusted the size of the hole, MSN could also act as drug carrier, thereby enhancing the drug loading capacity. The composite hydrogels underwent a phase transition at 33.7 °C (at the lower critical solution temperature). The hemolysis rate of the composite hydrogels was less than 1%, thus they can be classified as a nonhemolytic materials with good biocompatibility. The composite hydrogels reported here thus have great potential in drug transport and temperature-activated drug release. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137, 48391.