For decentralized ordered statistics (OS) constant false alarm ration (CFAR) detection system,the parameter estimation and performance analysis in complicated detection condition is a typical nonlinear optimization problem.Owing to the nonlinear property of distributed OS-CFAR detection system,it is seriously difficult to obtain optimal threshold values using some optimization method at the fusion center.This paper provides a novel solution based on an effective and flexible particle swarm optimization (PSO) algorithm.As a novel evolutionary computation technique,PSO has attracted much attention and wide applications,owing to its simple concept,easy implementation and quick convergence.Using this approach,all system parameters can be optimized simultaneously.The simulation results show that the proposed approach can achieve effective performances with the above method.

关键词：恒虚警比（CFAR）检测；分布有序统计恒虚警比（OS-CFAR）检测器；非线性优化；粒子群优化

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The project supported the Nuclear Regulatory Commission (NRC) in identifying and evaluating the regulatory implications concerning the control and protection systems proposed for use in the Department of Energy's (DOE) Next-Generation Nuclear Plant (NGNP). The NGNP, using modular high-temperature gas-cooled reactor (HTGR) technology, is to provide commercial industries with electricity and high-temperature process heat for industrial processes such as hydrogen production. Process heat temperatures range from 700 to 950 C, and for the upper range of these operation temperatures, the modular HTGR is sometimes referred to as the Very High Temperature Reactor or VHTR. Initial NGNP designs are for operation in the lower temperature range. The defining safety characteristic of the modular HTGR is that its primary defense against serious accidents is to be achieved through its inherent properties of the fuel and core. Because of its strong negative temperature coefficient of reactivity and the capability of the fuel to withstand high temperatures, fast-acting active safety systems or prompt operator actions should not be required to prevent significant fuel failure and fission product release. The plant is designed such that its inherent features should provide adequate protection despite operational errors or equipment failure. Figure 1 shows an example modular HTGR layout (prismatic core version), where its inlet coolant enters the reactor vessel at the bottom, traversing up the sides to the top plenum, down-flow through an annular core, and exiting from the lower plenum (hot duct).

关键词：高温气冷堆式电抗器；控制系统；制氢

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CCP is a calibration protocol based on CAN bus.It has many general-purpose features,such as high communication speed and excellent compatibility.This article introduces its basic principle,communication mode,and work mode for ECU calibration,and discusses a design method of Automobile ECU Calibration based on this protocol.The practical application results show that this calibration system can be implemented effectively on ECU of automobile system for on-line calibration,and provide custom-made function aimed at different demand of users.Therefore,it will be applied well in the automotive electronic control system.

关键词：CCP协议；CAN总线；校准系统；ECU；主/从设备

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Traditional methods for crack distress detection cannot capture the geometric information of images and tend to amplify noise.In order to solve this problem,an improved algorithm based on contourlet transform and multi-direction morphological structuring elements is proposed.The new algorithm decomposed image into approximation coefficients and detail coefficients. Morphological erode operations is used to distinguish noise form detail information according to dependencies of contourlet coefficients,then nonlinear mapping function is used to modify the contourlet coefficients.And the enhanced image is obtained by contourlet inverse transform.Compared with other traditional methods,the experimental results indicate that our method can effectively extract the edges of cracks and evidently decrease the influence of noises.Moreover,it can provide good image processing speed.

关键词：图像增强；contourlet变换；数学形态学；多方向结构元素成分

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Verilog is the most widely used hardware description language.It can be used in the modeling,synthesis,and simulation stages of the hardware system designing.This thesis is about applying Verilog HDL to design the multifunctional electronic timing system.This system has brought about the timing function,the Alarm clock function,the time checking module,the stop clock module,the exact hour alarming module,the alarm clock's shielding and alarming function module and the stop clock Prompting function module.The modules which have applied this design can be transplanted to other kinds of electronic control systems conveniently.This system uses the Verilog HDL to design,so it has nothing to do with the craft.It allows us to attain the applicable actual circuit easily without considering much about the details of the gate level and the realization of the craft in the function designing stage and the logic verification stage.We just need to exert different conditions according to the demand of the design of the system.

关键词：Verilog HDL语言;多种功能;硬件描述语言

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A prototype of video detection system applied to traffic flow inspection is developed,which uses CMOS linear image sensor with high resolution 2K pixels and wide dynamic range as the core of imaging device.It combines FPGA with DSP as the core of acquisition and processing of massive image data.Moreover,a novel multiscale and hierarchical clustering algorithm for image segmentation is presented.Based on the theory of graph spectral,the algorithm can construct a new graph by analyzing the feature of an original image at different clustering scales,so that image (gmentation) can be accomplished easily to segment the image.The simulation results show that the (scan) speed of this system can reach to 1000 lines per second,the resolution being 2048 pixels.

关键词：电控；视频检测; CMOS线图像传感器; DSP

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The broad research objective of the overall project was the development of multi-scale optimization approaches to aid in the design of energy storage systems. More specically, we focused on the development of optimization methods that operate on different physical length-scales for optimizing the internal structure of nanoporous materials. Potential applications include electrical supercapacitors and hydrogen storage systems. The optimization algorithms we have developed can be applied to more general hierarchical design problems arising from the design of complex systems.

关键词：储能系统;多孔材料;算法;电容;无孔的材料

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This paper analyzes the Flash Memory interface,SDRAM interface,Ethernet interface and Serial-port expansion circuit.The Embedded Multi-channel Data Acquisition System is designed by MCF5272 microprocessor.The main control system of MCF5272 includes SDRAM,Flash and BDM interface and so on.At the software design,we main introduce the compile and develop of bootload and the compiler and debugging environment of μClinux build.On this base,the general methods and points of the embedded system hardware design were summarized.

关键词：MCF5272；嵌入式微处理器；SDRAM；FLASH

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Pure Electric Vehicles (PEV) is an important research direction to solve the problems of auto environment and energy sources.Research double close-loop control system of PEV driven by Brushless Direct Current Motor (BLDCM) has the practical value.Traditional PID controllers have some advantages of being simple,reliable and effective for linear systems,but not for time-varying systems or highly non-linear systems.In order to improve the performances in both steady state and transient state of control system,an Adaptive Fuzzy PID Controller (AFPIDC) can be employed.The dynamic model of PEV and the mathematic model of BLDCM can be analyzed and established.Simulation model of Speed and Current Double Close-Loop Control System are implemented by MatlabT.0/simulink.The simulation results show that the system has rapid response,without static error and overshoot,good performance and strong robustness,high capacity of resisting disturbance.

关键词：纯电动汽车（PEV）；无刷直流电动机（BLDCM）；自适应模糊PID控制器（AFPIDC）；模拟

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The current scarcity of public charging infrastructure is one of the major barriers to mass household adoption of plug-in electric vehicles (PEVs). Although most PEV drivers can recharge their vehicles at home, the limited driving range of the vehicles restricts their usefulness for long-distance travel. In this paper, an agent-based information system is presented for identifying patterns in residential PEV ownership and driving activities to enable strategic deployment of new charging infrastructure. Driver agents consider their own driving activities within the simulated environment, in addition to the presence of charging stations and the vehicle ownership of others in their social network, when purchasing a new vehicle. Aside from conventional vehicles, drivers may select among multiple electric alternatives, including two PEV options. The Chicagoland area is used as a case study to demonstrate the different deployment scenarios are analyzed.

关键词：电动车;电动收费;信息系统;机动车驾驶

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