Abstract:In this paper,the focus measurement of a linear CCD space remote sensing camera in push-broom mode is studied by using a digital image processing method.Because there is no overlap between two images obtained continuously by the linear CCD space remote sensing camera in push-broom mode,it is difficult to select the evaluation function of image definition.According to the optical transfer function theory,the rough focus adjustment evaluation function based on blur estimation is established. From two images at different defocus positions,the defocus can be estimated and hence the lens can be adjusted directly to the focus range.In light of the principle that most natural scenes have certain invariability in power spectra,the fine focus adjustment evaluation function based on power spectrum is established and the accurate focus is further found.The simulation results have shown that this method which combines rough and fine focus adjustment can ensure the focusing accuracy while improving the focusing speed.

Abstract:In this paper, the reason why the performance of space blackbody calibration systems are changed is analyzed. The space blackbody calibration system is exposed to the orbital vacuum and thermal environment, so its optical surface is easy to be contaminated by the contaminant sources in space. An analysis model for describing the damage of the blackbody calibration system due to contamination is established and the contamination influence parameters of the blackbody calibration system are calculated preliminarily. By sorting the space pollution sources, the affection of inner or external sources on the space blackbody calibration system is discussed and some suggestions on protecting the space blackbody calibration system are offered.

Abstract:为了获得尽可能大的信号带宽和连续可调的时延差,本文设计了一个基于啁啾光纤光栅和多波长激光器的延迟线.通过调制啁啾光纤光栅,实现了33.60ps到45.68ps的连续可调时延差.将此延迟线应用在相控阵雷达中,实现了微波信号在10GHz带宽范围内波束指向角从47.32°到90.00°的连续控制.

Abstract:The development of the performance evaluation of infrared automatic target recognition (ATR)algorithms is reviewed in this paper.The operating condition limitation and performance specifi- cation selection necessary for ATR algorithm evaluation are presented.Several conventional approaches used in ATR algorithm evaluation are summarized.

Abstract:The typical applications of adaptive background prediction technology in weak and small infrared target detection are summarized in this paper. The advantages and disadvangtages of linear and nonlinear adaptive algorithms are analyzed. The traditional LMS algorithm is improved. The improved algorithm processes the consecutive frames according to the motion characteristics of targets. The experimental results have shown that this algorithm can effectively suppress the false alarm caused by the edge of cloud and its capability to process unstable and nonlinear clutter background and low SNR images is improved.

Abstract:The laser chaff is mainly used to interfere the laser seekers of semiactive laser guidance weapons. They either scatter the laser in the form of cloud and reduce the laser energy rapidly so as to make the energy reflected from the target less than the response threshold of the laser deeker, or take the form of false targets near the target and are illuminated by the laser illuminator of our own side to induce the laser seeker to acquire the scatter light from the false target. Therefore, the reflectivity and scattering efficiency are the important characteristics of laser chaff. The static reflectivity and dynamic scattering efficiency of five kind of laser chaff materials selected are tested and analyzed.

Abstract:In this paper, the temperature reduction principle of infrared camouflge paint is presented and the infrared camouflage methods used for large military targets are described. In combination with the research on the application of temperature reduction paint in infrared camouflage, some methods for improving infrared temperature reduction camouflage paint are proposed in theory.

Abstract:The influence of calibration constant K, spectrum region selection and spectrum preprocessing on the veracity of a calibration model when establishing a model for rapidly determining aroma composition in naphtha by near-infrared spectroscopy are analyzed. The analysis result has shown that the model for rapidly determining the aroma composition in naphtha established by using least square in the spectral region from 11000cm^-1 to 6099.7cm^-1 has a predicted value less than 2.0% and can be used to determine the aroma composition in naphtha rapidly and accurately. Now, this method has been used in the production process.

Abstract:As a new analysis technique,the Near-infrared Spectroscopy(NIRS)has found wider and wider applications.The basic principle and detection process of NIRS and the latest research progress of the application of domestic NIRS in quality analysis of milk and its diary products are presented.The problems in current research is analyzed,the future research is forecasted and some suggestions are put forward.

Abstract:信号情报(SIGINT)是一个总称,它包括通信情报(COMINT)、电子情报(ELINT)以及量度与特征情报(MASINT)系统.

Abstract:有机聚合物半导体材料已被证明将有希望在光电子领域获得多种应用。其中最有希望的一种应用是在可见光谱区的光发射和接收方面。然而，有机材料对红外谱区的光是不响应的。为了克服这个问题，人们开始用不吸收红外光的纳米粒子如PbSe和PbS纳米粒子来敏化有机半导体材料。但是这些纳米粒子的缺点是它们掺入到聚合物中的能力较差，

Abstract:一、系统的建模Ⅰ 1.二维可见光图像与三维可见光图像在识别手持式危险物体方面的性能比较(特邀论文,K.Krapels,美国海军研究管理处)