多路缓变信号记录仪

本文介绍了多路缓变信号记录仪的系统构成,研究设计了多路缓变信号记录仪的硬件电路,较详细地介绍了该系统的工作原理及软件编程要点。     

三维目标旋转畸变不变光学相关滤波器组的设计

研究了三维目标旋转畸变不变光学相关滤波器组的设计原理，完成了滤波器组参数的计算和编码，以及光学相关识别的计算机模拟。     

InGaAs（P）分别限制应变单量子阱激光器的优化设计

针对较常用的ＩｎＧａＡｓ（Ｐ）分别限制应变单量子阱激光器，给出了为得到最大净增益的优化设计参数。对于激射波长为１．５５μｍ的无应变激光器，最佳的光限制层波长为１．２４μｍ，厚度为１００ｎｍ。当阱材料引入压缩应变后．由于价带的有效状态密度减小，量子阱激光器的微分增益变大，阱深的增大对增大线性增益的效果更加明显．所以最佳光限制层的波长将变短，为１．２０μｍ     

异型材挤出口模内的流动模拟

本文根据挤出机理，对口模内的流动行为进行适当的简化和假定，建立了挤出口模内流动分析的数学模型，并采用横截面／假想区域法实现了复杂异型材挤出口模内的数值模拟，数值分析结果与三维有限元解和解析解的对比，取得了满意的效果。     

60MHz相位介电测井仪模拟刻度器设计

文章以介电测井理论为基础，借鉴感应仪的模拟刻度方法，对大庆油田的６０ＭＨｚ相位介电井仪的模拟刻度进行了研究。参照国内外有关资料，提出了模拟刻度器的设计模型，通过理论分析与计算，建立了一套模拟刻度方法。现场初步试验，该方法取得了一定物效果，为进一步提高仪器的测量精度提供了依据。     

球状碳单质分子的发现,研究现状及应用前景

综述了碳的第三种同素异形体──球状碳单质分子的发现、结构、性质及其应用前景。     

复相陶瓷导电性与其粒径级配的关系研究

通过对无序渗流模型的修正，建立了具有不同特征尺寸的两相无序体系的导电模型，推导了相关关系式，将其结果与相复合导电陶瓷的实验结果进行了比较，结论相当一致。由此揭示了陶瓷生料的两相粒径分布对复合导电陶瓷导电性的影响。     

NH—1干粉瓦楞纸板粘合剂的研制

采用复合改性剂生产改性淀粉,制得干粉状NH—1粘合剂,并进行了工业化生产,取得了满意的结果。     

Concealed weapon detection and visualization in a synthesized image

Images acquired by heterogeneous image sensors may provide complementary information about the scene, for instance, the visual image can provide personal identification information like the facial pattern while the infrared (IR) or millimeter wave image can detect the suspicious regions of concealed weapons. Usually, a technique, namely multiresolution pixel-level image fusion is applied to integrate the information from multi-sensor images. However, when the images are significantly different, the performance of the multiresolution fusion algorithms is not always satisfactory. In this study, a new strategy consisting of two steps is proposed. The first step is to use an unsupervised fuzzy k-means clustering to detect the concealed weapon from the IR image. The detected region is embedded in the visual image in the second step and this process is implemented with a multiresolution mosaic technique. Therefore, the synthesized image retains the quality comparable to the visual image while the region of the concealed weapon is highlighted and enhanced. The experimental results indicate the efficiency of the proposed approach.This material is based on part of the work carried out at the SPCR laboratory of Lehigh University and the work is partially supported by the U. S. Army Research Office under grant number DAAD19-00-1-0431. The content of the information does not necessarily reflect the position or the policy of the federal government, and no official endorsement should be inferred.