A novel intramolecular Ugi 3CC for the synthesis of N-alkyl-3-oxo-2-aryl-1,2,3,4-tetrahydropyrazino[1,2-a]indole-1-carboxamides

An intramolecular Ugi reaction of 2-(2-formyl-1H-indol-1-yl)acetic acid with aryl amines and isocyanides has been developed to produce a novel class of N-alkyl-3-oxo-2-aryl-1,2,3,4-tetrahydropyrazino[1,2-a]indole-1-carboxamides in good yields. This is the first report on intramolecular Ugi three component reaction of 2-(2-formyl-1H-indol-1-yl)acetic acid, aryl amine, and isonitrile.     

基于ZigBee技术的水质监测系统

为了实现水质的实时监测,提出了一种基于ZigBee技术的多参数水质监测系统,并对系统的硬件和软件进行了详细的分析和设计。无线传输节点采用了TI公司的单芯片CC2430＋低功耗功放CC2591解决方案,并修改和移植了ZigBee精简协议栈代码,再编写水质监测系统的应用程序和相关驱动程序。试验结果表明,该系统可扩展性强,节点功耗低,实时性能够满足水质监测系统的需求。     

Development of YBCO power devices in Japan

A new Japanese national project, called M-PACC, to develop high temperature superconducting electric power devices started in June last year (FY2008–FY2012). This project aims to develop three different types of electric power devices that are expected to provide stable power supplies with large capacity and small size by using YBCO coated conductors. The first program is the development of a 2 GJ class superconducting magnetic energy storage system to control stable electric power systems. It is planned to develop several sets of element coils for a 20 MJ class system as a technological feasibility study for a 2 GJ class coil. The second program is the development of two different types of power cables with higher performance than existing power cables; one is a three-core 66 kV–5 kA class large current cable and the other is a single-phase 275 kV–3 kA class high voltage cable. These cable were required several technological developments, namely, large current and low AC loss, high voltage insulation and low dielectric loss, and power and heat balance for both cables. The third program is the development of a 20 MVA class power transformer with 66 kV/6.9 kV as a distribution transformer. In this project, power transformer systematization technology including 2 kA class large current coil technology, anti short-circuit wire winding technology, AC loss reduction technology, and winding technology will be developed.     

基于CC1100的无线自动抄表系统设计

为了提高电度表的抄录、校准等工作的效率和准确性,开发了一种基于CC1100无线通信模块。此模块用来实现上位单片机和多个单片机间的无线串行通信,并利用此方法设计了一种新型无线抄表系统。本文给出了硬件线路图、程序流程图。此抄表系统硬件电路简单、成本低廉、编程方便。     

基于CC1050的FSK发射电路设计

介绍基于CC1050的FSK发射电路设计。该电路的工作频率范围为300～1 000 MHz,FSK调制,发射功率可编程设置为-20～12 dBm,给出CC1050的典型应用电路,以及CC1050与微控制器接口电路,该FSK电路设计简单,可工作在不同频率。     

基于CC1101的无中心数字对讲机设计

基于射频收发器CC1101,单片机（MCU）MSP430F149和DSPTMS320VC5509A,设计了一种无中心数字对讲机。详细介绍了系统的设计方案及各个模块的器件选型和电路设计,MCU部分的软件设计以及CC1101的编程要点。     

基于无线传感器网络的核电装备状态监测系统设计

针对核电站运行环境复杂,人员难以靠近等特点,提出基于无线传感器网络的核电装备状态监测系统,采用LM3S1138和CC2420作为无线传感器网络的主要硬件.核电设备监测系统对实时性要求特别高,为此采用分层路由协议TEEN,并为每个节点设置一个计数器.通过Matlab虚拟仿真平台和现场数据采集表明,此系统能够对信号实现有效的采集.     

基于C8051F040的模型车无线控制系统的设计

为了给汽车耐久性试验的驾驶机器人提供仿真驾驶平台,实现对模型车运动的无线控制,设计了由无线收发单元与运动控制单元组成的模型车无线控制系统.系统以单片机C8051F040为控制核心,使用基于ZigBee的无线收发芯片CC2431与上位机通讯.通过接受上位机的信号,系统能实现机器人仿真驾驶,对机器人驾驶算法的可靠性进行验证.     

基于CC2431的室内定位系统

在室内环境下对移动目标定位可使用的技术主要有超声波定位技术、射频识别技术以及基于接收信号强度(RSSI)的定位技术.经过比较,基于接收信号强度(RSSI)的定位技术更适合于复杂的室内环境.介绍基于RSSI定位机制的CC2431片内集成定位引擎在室内定位系统中的应用,并在室内环境下进行了实测,其定位效果良好.