Abstract:The good properties of THz wave and how to use photoconductive antenna and optical rectification to generate THz wave are described in detail.The applications of THz wave in long distance surveillance,imaging,exploder distinguishing,nondistructive inspection and particularly in the field of military are presented.

Abstract:In this paper,the Optical True Time Delay(OTTD)shifter,optical heterodyne SSB radio frequency(RF)shifter and the photonic RF phase shifter based on vector sum technique are presented and their operation principle and technical features are analyzed respectively.

Abstract:In this paper,the principle and features of four-wave mixing are given.The generation of four-wave mixing is derived in theory and the applications of four-wave mixing in the DWDM for optical fiber communication,phase conjugation wave generation and real time optical detection are given.The study in this paper is aimed at more completely knowing the application direction of the four-wave mixing, a typical nonlinear optical effect and finding more applications for the four-wave mixing by summing up the existing relatively mature applications and research methods.

Abstract:A numerical analysis model for calculating the temperature field of a tank power train com- partment is established.A liquid-solid coupling calculating method is used to calculate the temperature field of the tank wall suface and a wall function method is used to modify the internal flow field of the solid wall.Through heat exchange calculation of solid-liquid two-way coupling and consideration of the effect of sun irradiation on body temperature field,the temperature field distribution on the wall surface of the tank body is derived.The calculation result is compared with the measurement result.The research result shows that the relative error between the calculation result and the measurement result is less than 9.034%.This numerical calculation method can be used to calculate and analyze the temperature field of the power train compartment body and can meet the needs of engineering applications basically.

Abstract:In this paper,the energy form of human life information is illustrated in view of biology and the field theory in physics.The technical mechanism and discipline foundation of the sensors for gathering human life information are described.The design and typical applications of human life information gathering and positioning systems are discussed.The human life detection techniques used in the rescue systems of our country are explained.Finally,the development trend of human life detection techniques is forecasted.

Abstract:In this paper,a method for detecting dim small moving infrared target based on gray morphological accumulation and SUSAN algorithm is proposed.First,a Butterworth high pass filter is used to process the original infrared image,thus an image containing some noise and target points is obtained.Then,the ratio of signal to noise of the image is further enhanced through the multi-frame accumulation in gray morphology.Finally,the SUNSAN detection algorithm is used to process the image which is multi-frame accumulated and detect the true target.In order to improve the real time performance of small target detection,a hardware structure based on FPGA and DSP is given.The experimental result shows that this method can eliminate background and depress noise effectively and hence detect the moving small infrared target accurately and effectively.

Abstract:Target segmentation is a basic and critical technology in the fields of image processing, computer vision and artificial intelligence.It aims at providing evidence for the subsequent identification, classification,tracking and retrieval.Because infrared images have the features of low contrast,high noise, blurring,etc,the genetic algorithm is used in the threshold segmentation of them.In this paper,the threshold segmentation algorithms for infrared images are overviewed.The research on the application of genetic algorithms in segmentation of infrared images,the research status and new technologies are presented.The algorithm is used in the processing of infrared images and a good result is obtained.

Abstract:To measure the thickness of glass by using a displacement sensor on line is an effective method.In the production process of glass,the thickness of glass is directly related to the product quality.Therefore,in this paper,an on-line glass thickness measurement apparatus is presented and a glass thickness measurement system which uses a CCD laser displacement sensor as its signal receiver and can display measurement result in real time is proposed.After the measured data are collected and stored with an A/D card and read out by a computer,the glass thickness can be obtained.

Abstract:A driving circuit for a semiconductor laser is designed.The structure of the semiconductor laser and its circuit are presented.The operation principle and design ideas of the constant current and voltage circuits in the semiconductor laser driving circuit are described.The power consumption of the semiconductor laser is decreased effectively after a constant voltage circuit module is added in the design of the circuit.

Abstract:第一部分 一、探测与识别 1.高光谱图像的结构模型中正交子空间投影探测器与匹配滤光片的分析比较(P.Bajorski,美国罗彻斯特理工学院)

Abstract:In order to measure the temperature of the medium and detonation products under impact and compression conditions,an optical measurement method is chosen in this paper.According to the principle of optical temperature measurement,how to use a pyrometer to measure the temperature of detonation products in experiment is described.Through the comparison of the temperature distribution curves of detonation products obtained in experiment with the theoretical ones,the feasibility of this method is verified.