变电站现场巡视系统建设探讨

随着社会的进步,电力行业飞速的发展,变电站设备的管理与维护变得日益重要。而当前设备数量的与日俱增与原有的设备巡视管理手段的矛盾日益加深。所以新的巡视方式的引入显得尤为重要。     

蓝牙无线传输技术在电能质量监测系统中的应用

传统的电能质量监测系统通常采用RS232或现场总线等有线连接方式进行数据传输,这种有线数据传输方式往往因为布线困难等原因受到限制.本文基于蓝牙无线传输技术设计了一个电能质量数据采集系统,并详细介绍了系统软硬件的开发流程.最后,利用PDA实现了对工业现场电能质量数据的无线实时测量和显示.应用结果表明,该系统具备低成本、灵活性、移动性及抗干扰性强等特点,具有广阔的应用前景.     

平菇原生质体释放过程的电镜扫描研究

本文用电子显微镜扫描的方法,对平菇菌丝释放原生质体的过程进行了探讨,摸索出了一套从玻璃纸培养的菌丝获取原生质体,并进行电镜扫描的理想研究方法,进一步证实了原生质体顶端释放,侧面释放和断裂释放的三种释放方式,并对原生质体的形状,表面结构进行了详细的描述.在电镜下,原生质体呈倒卵形,光滑圆球形或表面有齿状或皱褶突起的圆球形.     

基于PDA的水调信息移动查询系统

基于个人数字助理（PDA）的水调信息移动查询系统采用TCP/IP通信机制,PDA终端通过通用分组无线电业务（GPRS）接入水调内部网络,通过WebService提供数据服务实现对水调信息的移动查询。该系统已应用到福建电网水调系统中,为水库调度决策提供了及时有效的信息技术支持,大大提高了水库调度的快速反应能力和工作效率。     

Detection of Foot‐and‐Mouth Disease Virus Using a Polydiacetylene Immunosensor on Solid‐Liquid Phase

The rapid detection of foot‐and‐mouth disease virus (FMDV) is vital for the prevention of foot‐and‐mouth disease outbreaks. In this study, a polyvinylidene difluoride (PVDF)‐supported polydiacetylene (PDA) immunosensor is developed to detect FMDV, in which a polyclonal antibody against the FMDV VP1 antigen is conjugated as a specific virus‐binding module without a linker. First, a liposome‐based immunosensor is generated for the FMDV VP1 protein in the form of photopolymerized PDA colloids. Then, the VP1‐specific PDA immunosensors are modified onto PVDF strip to enable the rapid and portable detection of FMDV. Detailed analyses are performed using ultraviolet‐visible spectroscopy, dynamic light scattering, transmission electron microscopy, and scanning electron microscopy. A blue‐to‐red color transition is observed in the presence of FMDV particles, indicating the potential applications of FMDV‐specific PDA immunosensors for use in solid‐phase detection as well as via liquid‐phase liposome platforms. Thus, this work provides a rapid and simple detection for FMDV.     

Bioinspired Fabrication of Insensitive HMX Particles with Polydopamine Coating

The development of a facile method for large scale production of insensitive HMX particles is of great importance for energetic materials, especially for insensitive munitions. Inspired by mussels, HMX particles with a thin, robust, wettable and uniform coating based on the self‐polymerization of dopamine were prepared by one‐step solution stirring processes in the study. The as‐prepared HMX@PDA particles showed stable shape, size, and polymorphy compared with original HMX particles. With PDA (polydopamine) coating, the HMX@PDA particles exhibited better wettability, which could improve the adhesive properties between particles and other liquid components in a PBX (plastic bonded explosive). Furthermore, the mechanical sensitivities were decreased for the HMX@PDA particles because of the uniform and smooth PDA coating decreasing the hot spots on the surface of the HMX particles. HMX@PDA particles produced by a facile scalable process might provide a promising substitute for sensitive HMX particles to enhance the safety and adhesive properties when used in PBX.     

Antioxidant activity and constituents of propolis collected in various areas of China

Propolis is a resinous substance collected by honeybees from various plant sources. The composition of propolis depends on time, vegetation, and the area of collection. This study examined the antioxidant activity of propolis from various areas of China: Heilongjiang, Neimongol, Hebei, Shandong, Shanxi, Gansu, Henan, Hubei, Sichuan, Hunan, Yunnan and Hainan. Ethanol extracts of propolis (EEP) were prepared and evaluated for their antioxidant activities by β-carotene bleaching, 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical-scavenging, and 2,2′-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) radical cation decolorization assays. Furthermore, the major constituents in EEP were identified by high-performance liquid chromatography (HPLC) analysis with a photodiode array (PDA) and mass spectrometric (MS) detection, and each component was quantitatively analyzed. All propolis samples except that from Yunnan had relatively strong antioxidant activity accompanied by high total polyphenol contents. Propolis with strong antioxidant activity contained large amounts of antioxidative compounds, such as caffeic acid, ferulic acid and caffeic acid phenethyl ester. On the other hand, propolis from Yunnan and Hainan had compounds not present in propolis from other areas.     

区域高精度GPS改正数模型化方法的探讨

随着载波相位观测技术与网络通讯技术的发展与成熟,对于区域内GPS改正数模型化并通过网络传播于用户的研究亦已取得相当的成果。对偏导数算法（PDA）和线性内插算法（LIA）两种改正数模型化方法进行探讨,并说明两种方法的优缺与应用范围。     

基于蓝牙通信的汽车检测系统的研究

本文采用蓝牙技术和CPS技术研制了一种汽车检测系统.提出了利用GPS进行速度检测和蓝牙模块进行通信的系统总体设计方案.设计了系统中的检测终端电路,开发了GPS接口和蓝牙模块的串行接口.制定了检测终端中单片机模块电路与CP3和PDA的通信协议,编写了通信软件,实现了对汽车检测数据的无线传输.提高了汽车检测的工作效率和水平.     

无线校园网中PDA的应用

无线校园网方兴未艾,其主角为笔记本电脑,本文介绍PDA作为个人数据助手在替代或者部分替代笔记本电脑方面做一些探讨,并展示一些PDA在无线校园网络下的应用实例。