检测系统

Firstly the basic principle of OFDM and its anti-multi-path-fading are briefly introduced in this paper. Then basing on this point, we researched the basic principle, the coding designing and the algorithm of the signal detection of these MIMO-OFDM systems. At the same time, the performances of STBC-OFDM and SFBC-OFDM were analyzed and simulated under short wave circumstance, and got some useful conclusions, they have certain reference value for more research of short wave communication in future.

本文首先介绍了OFDM系统的基本原理以及它对抗多径的基本原理，然后在此基础上，对其所形成的几种MIMO-OFDM系统的基本工作原理，码字设计以及相应的信号检测算法进行了研究，详细分析研究了STBC-OFDM和SFBC-OFDM系统的性能并在短波信道下对其性能进行了仿真和对比分析，得出了有用的结论，这对以后短波通信的深入研究具有参考价值。

Video surveillance systems and burglar alarm system is Jiangdu food and drug safety inspection center of an important component of the system.

视频监控系统和防盗报警系统是江都食品药品检验检测中心公共安全系统的重要组成部分。

At the same time, combining with the actual condition of delivery pipeline of our country and some prevalent leak detection and location methods, this paper raised a method, which is based on wavelet analysis and negative- pressure-wave to detect and locate the leakage. Jobs in the paper are as follows:As affected by gas density, pressure, specific heat and pipe material, the velocity of negative-pressure-wave improved depending on the energy conservation. At one time, taking the affection of velocity of gas flow, the location formula was modified in some degree.When locating the leaks with location formula, the iterative approach algorithm was adopted as a new method to increase the location accuracy level of system.Multi-scale decomposition and reconstruction of wavelet transform is utilized to filter the noise of negative-pressure-wave, which was brought by leakage. With the capacity to detect the signal singularity fast and accurately, wavelet transform was used to catch the break point of pressure signal. The work improved the accuracy of At in location formula, accordingly improved the location accuracy.Wavelet is a suitable tool for signal analysis. The distinct character is that the mother-wavelet is of optional. That means choosing different mother-wavelet will get different analysis result. So we studied how to choose mother-wavelet and its scale for signal singularity detection. The method is to choose a wavelet by regularities of the wavelet and the signal.Finally, a plan, which bases on SCADA system for inspection and detection of natural gas leakage, is proposed in the article.

其中，主要进行了以下几方面的工作：针对泄漏产生的负压波在管道中的传播速度受媒介的密度、压力、比热及材质等因素的影响，而非声波在空气中传播的速度，本文利用能量守恒原理，对其进行了修正；考虑到管内气体流速对压力波速的影响，对原始的负压波定位公式进行了一定程度的改进，并在利用定位公式进行泄漏点定位时采用逐步迭代逼近算法，提高了系统的定位精度；利用小波变换的多分辨率分解和重构技术，对采集到的管道发生泄漏时产生的负压波信号进行了降噪处理；并利用小波变换技术对信号奇异点的快速、准确的识别能力，对经上述消噪后的负压波信号进行了奇异点捕捉，精确捕捉的结果提高了定位公式中上下游站点采集到的负压波奇异点的时间差△t的精度，从而进一步提高了定位的精度；考虑到小波变换是一种基波可变的信号分析工具，也就是说，不同的小波基波对信号分析的结果将有很大差别，这势必影响最终的处理结果，因此，我们又对比分析了本课题中小波基及尺度的选择问题，依据规则性系数相似性原理对母小波的选择进行了探索性研究；最后，还提出了基于SCADA的泄漏检测与定位系统的软件开发构想及系统的嵌入方案。

Firstly, oscilloscope control system based on GPIB technique is presented with friendly operation environment to the HIFU system, and it uses multithreading technique in programming to realize real-time recording and display of the signal; Secondly, temperature collection and data recording system is designed, which also could get real-time recording and display of the 16 channel temperature signal, and it's believed to be of great use for further experiments of the HIFU system; Thirdly, multiple ultrasonic phased array's phase shifter is designed,which could provide 8-bit phase control in a range of frequency where the centrical frequency is 1MHZ. Fourthly, the module of serial communication is realized to insure the communication between devices and computer, including both synchronous and asynchronous communication, which enables the system to transfer data reliably and stably; Finally, the module of digital quantity control is accomplished, which provide for upper application the consistent solution to the control of exterior devices via digital interface. It can get or set the devices state using interrupt mode to receive input signal or send output signal.

主要有以下几个方面：设计了基于GPIB的示波器控制系统，给课题的研究工作提供了一个良好的环境，它采用了多线程编程的方法，能够较好的实时显示当前波形并记录数据；设计了温度采集和数据记录系统，能够对16路温度信号进行并行同步的实时采集，用于HIFU剂量学研究中温度场检测和医疗评价；设计了相控阵相位延时电路并且通过调试，满足了课题的相位控制的要求，在中心频率为1MHZ左右的频率范围内都能够达到8-bit相位控制；实现了串口通讯模块，为各项设备与计算机之间的通讯提供保证，它提供同步和异步的通讯能力，使系统能够可靠稳定的传输数据；建立了数字量控制模块，为上层应用程序提供一致的方法使用数字接口控制外部仪器，它使用中断的方式来接收输入或输出设定的开关量信号，从而得到或设定各种仪器的状态。

VDC E/R control system, emergency D.G. starting apparatus, fire detection central unit, CO2release alarm, radio station.

VDC 机舱控制系统，应急发电机启动系统，火警检测中央系统，CO2报警系统，无线电

Intelligent electronic / appliance Backup phone cards Anti-lost Remote coffee pot Rice cookers Remote control electromagnetic Cup High pressure I Long-distance telephone controller The remote control unit Curtain remote controller Smart fans Universal remote control Detector IC Gas Meter Meter Meter IC reader IC Card Access Control System Intelligent Community System Electric water system Smoke Alarm Induction faucet Automotive electronics Vehicle Black Box Car Bluetooth phone headset Car audio Vehicle PON The garage door remote controller Reverse Radar Tire pressure testing Odometer Car freezer Electric car dashboards Security for electric cars Wireless data transmission Wireless Mouse Intercoms RF / IR remote control toys Wireless remote control cars Helicopter Glider Glider ship Tanks (360) Vigorously dump truck Fashion video / computer peripheral PS console External PsP/PS2 Wii / external IPod / iPhone / external Display Control PC-MOUSE Single / double roller, remote MOUSE Keyboard Tablet Personalized electronic reminded of Multifunction scales.

帮忙翻译一下，专业说法，谢谢！智能电子/家电手机卡备份器防丢器遥控咖啡壶电饭煲遥控电磁杯高压电饭锅远程电话控制器遥控空调装置遥控窗帘控制器智能风扇万能遥控器探测器 IC卡煤气表电能表水表 IC读写器 IC卡门禁系统智能小区系统水电气收费系统烟雾报警器感应水龙头汽车电子车载黑匣子车载蓝牙电话耳机车载影音系统车载Gps 遥控车库门控制器倒车雷达胎压检测里程表汽车冰柜电动车控制板电动车防盗器无线数据传输无线鼠标对讲机 RF/IR遥控玩具无线遥控车直升机滑翔机滑翔船坦克大力翻斗车时尚电玩/计算机周边 PS游戏机 PsP/PS2外围 Wii/外围 iPod/iPhone/外围显示器控制 PC-MOUSE 单/双滚、遥控MOUSE 键盘手写板个性化电子提醒器多功能计步器。

Intelligent electronic / appliance Backup phone cards Anti-lost Remote coffee pot Rice cookers Remote control electromagnetic Cup High pressure I Long-distance telephone controller The remote control unit Curtain remote controller Smart fans Universal remote control Detector IC Gas Meter Meter Meter IC reader IC Card Access Control System Intelligent Community System Electric water system Smoke Alarm Induction faucet Automotive electronics Vehicle Black Box Car Bluetooth phone headset Car audio Vehicle PON The garage door remote controller Reverse Radar Tire pressure testing Odometer Car freezer Electric car dashboards Security for electric cars Wireless data transmission Wireless Mouse Intercoms RF / IR remote control toys Wireless remote control cars Helicopter Glider Glider ship Tanks (360) Vigorously dump truck Fashion video / computer peripheral PS console External PsP/PS2 Wii / external IPod / iPhone / external Display Control PC-MOUSE Single / double roller, remote MOUSE Keyboard Tablet Personalized electronic reminded of Multifunction scales.

0fb1af870b005a623d06380c6483e4f9 个人电子防丢器帮忙翻译一下，专业说法，谢谢！智能电子/家电手机卡备份器防丢器遥控咖啡壶电饭煲遥控电磁杯高压电饭锅远程电话控制器遥控空调装置遥控窗帘控制器智能风扇万能遥控器探测器 IC卡煤气表电能表水表 IC读写器 IC卡门禁系统智能小区系统水电气收费系统烟雾报警器感应水龙头汽车电子车载黑匣子车载蓝牙电话耳机车载影音系统车载Gps 遥控车库门控制器倒车雷达胎压检测里程表汽车冰柜电动车控制板电动车防盗器无线数据传输无线鼠标对讲机 RF/IR遥控玩具无线遥控车直升机滑翔机滑翔船坦克大力翻斗车时尚电玩/计算机周边 PS游戏机 PsP/PS2外围 Wii/外围 iPod/iPhone/外围显示器控制 PC-MOUSE 单/双滚、遥控MOUSE 键盘手写板个人电子防丢器性化电子提醒器多功能计步器。

The Company has introduced advanced detection means such as CNC injection molding machine, lamp assembly lines, AX-V6 glue manipulator system, ZCM-1688A-type lamp coating machine, UV light curing system, ZZ1688-56PI decorations high vacuum coating equipment, heat-curing system, hot plate welding machine, ultrasonic welding machine and other specialized production equipment and integrating sphere, J-25A mechanical shaking table, YMX/Q-250 salt spray corrosion test chamber, DSH-1 motor with optical properties of lighting analyzer, LX-010 rain chamber, GFY-A reflection facula miriam, KZ500 motor performance testing system, etc.

公司引进了国内外先进的电脑数控注塑机、灯具装配流水线、AX-V6机械手涂胶系统、ZCM-1688A型车灯镀膜机、UV光固化系统、ZZ1688-56PI高真空装饰镀膜设备、热固化系统、热板熔接机、超声熔接机等专用生产设备及积分球、J-25A机械振动台、YMX/Q-250盐雾腐蚀试验箱、DSH-1机动灯具配光性能分析仪、LX-010淋雨试验箱、GFY-A反射光斑仪、KZ500机动车配光性能测试系统等完备的检测手段。

In this paper, the existing production vehicle braking and acceleration systems to illustrate principles and analysis, Pointed out that it occurs in the course of the problem, With related technologies as the prerequisite, The use of hinged connections, solenoid valve motion, sensor detection, ECU control methods, Made false step on the accelerator pedal to switch the system concept, Emergency brake foot wrong lane when the accelerator pedal will speed up the system to switch into the brake system of the idea, Belongs to the field of automotive active safety technology.

摘 要：本文主要对现有量产汽车制动及加速系统原理加以说明与分析，提出其在使用过程中出现的问题，再以相关技术为前提，运用铰接连接、电磁阀动作、传感器检测，ECU控制等方法，提出误踩加速踏板切换系统构想，即紧急制动误踩加速踏板时将加速系统切换成制动系统的想法，属于汽车主动安全技术的领域。

The method of obtaining time delay parameters with the reverse access channel is discussed. The modified algorithms of classic correlation methods of TOA estimation are proposed. Noncoherently combining algorithm and group coherent combining algorithm are given. They decrease the computational complexity and are more suitable for implementations in practical systems. The leading edge detection algorithm is proposed to mitigate the effect of multipath in TOA estimation. Then the secondary search method is proposed, it can solve the matching issue of PN code in CDMA systems. The location algorithms based on LS are discussed; include circular trilateration with LS, hyperbolic trilateration with reference differencing, hyperbolic trilateration with sequential differencing and circular trilateration with TOA differences. The design and implementation of wireless location system based on TOA/TDOA in CDMA2000 systems are given. The location process is discussed, and the hardware and software implementation of TOA estimation are given. Finally, the wireless location system which uses TOA estimation and LS location algorithms above is tested in the real environment.

文中讨论了采用CDMA2000反向链路中的接入信道来获取时延的方法和过程；对TOA估计的传统的相关法进行了改进，提出了非相干合并相关法和分组合并相关法，减少了基于相关的时延估计算法的运算量，提高了算法的实用性，对算法进行了仿真和性能分析；采用边缘检测技术有效减少了TOA参数估计中的多径干扰，提高了时延参数估计的准确度；提出了一种TOA估计的二次搜索法，解决了多个定位测量单元同时进行TOA估计的PN码匹配问题，进一步了提高TOA估计的精度；在采用时延值的定位算法中引入了基于LS的圆周法、基于参考差的双曲线法、基于相邻差的双曲线法和基于TDOA的圆周法，讨论了各算法的应用条件，进行了算法性能的仿真分析；给出了CDMA2000系统中的TOA/TDOA的无线定位的系统方案和实现流程，并对TOA值估计算法进行了软硬件实现，还对采用TOA估计算法、LS定位算法和定位系统设计方案实现的定位系统的进行了现场定位性能测试。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。