灰色关联分析在主战坦克机动性评估中的应用

灰色关联分析方法建立在定性分析与定量研究相结合的基础上 ,是灰色系统理论中用于进行系统分析的一种基本方法 .该文运用该方法建立了主战坦克机动性评估模型 ,并编制应用程序 ,进行实例检验 .结果表明 ,这种方法科学合理 ,为主战坦克机动性的评估提供了新思路 .该模型具普遍意义 ,能推广应用于其它性能的评估     

Damage to n-MOSFETs from electrical stress Relationship to processing damage and impact on device reliability

The study reported herein examines and compares damage to n-channel and p-channel metal-oxide-silicon field-effect transistors (MOSFETs) from direct current (d.c.) and alternating current (a.c.) electrical stresses as well as the relationship of this damage to plasma processing damage in MOSFETs. The lightly-doped drain (LDD) MOSFETs used are of 0.5 μm channel length and with a 90 Å thick thermally grown gate oxide fabricated using a full flow CMOS process up to and including metal-1 processes and post-metallization annealing (PMA). The damage to MOSFETs is assessed using transistor parameter characterization and charge-to-breakdown measurements on the gate oxide. It is found that manifestations of d.c. stress-induced damage and a.c. stress-induced damage to transistors are fairly similar in that both forms of damage are passivated by PMA and are reactivated by a subsequent d.c. electrical stress. However, a.c. stress-induced damage is observed to occur at much lower electric fields across the gate oxide than those necessary for d.c. stress-induced damage to be significant. This is attributed to a.c. currents, caused by carrier hopping, occurring at relatively low electric fields. One implication of our results is that plasma-charging damage, often attributed to d.c. electrical stress alone, may comprise an a.c. electrical stress component too.     

Use of C-SAM acoustical microscopy in package evaluations and failure analysis

Acoustical microscopy is gaining wide acceptance in the microelectronic packaging community. C-mode scanning acoustical microscopy, C-SAM, is widely used in package evaluations and for failure analysis. This paper discusses several specific topics. These include: (1) popcorn cracking in SMDs; (2) an evaluation of solder die attach in power packages; (3) an instance of top of die delamination which resulted in electrical failures; and (4) moisture sensitivity of other surface mount power packages and how it resulted in ball bond degradation during a new product qualification.     

氢与YBa2Cu3Oδ相互作用分析初探

采用正电子湮没技术来初探氢与ＹＢａ２Ｃｕ３Ｏδ超导体中氧空穴和氧的作用，并运用溅射中性粒子质谱仪来检测氢在ＹＢａ２Ｃｕ３Ｏδ中的渗透情况，以了解ＹＢａ２Ｃｕ３Ｏδ中的位错，空穴等微观信息。     

磁约束脉冲放电电路分析

在已进行的实验研究的基础上,对所设计的磁约束脉冲放电电路进行了理论分析,获得了有关磁约束放电情况下的电路特性的认识。作者的研究为应用于磁约束放电的电路的进一步研究和改进打下了基础。     

小波变换在红外图象处理中的应用

小波变换近年来在图象处理中的应用日益受到人们的关注。小波变换可能同时在时间（或空间）和频率域对信号进行分析，是多分辨率分析的有力工具。本文介绍了小波变换在红外图象处理中的应用，例如红外／可见光图象的配准与融合，红外图象增强，红外图像中的微弱目标探测等。     

基于空间矩的灰度边缘亚像元度量精度分析

灰度图像中边缘定位受采样密度限制，亚像元精度度量方法在需要高精度的应用中受到重视，要想知识到底需要多高的分辨率才能达到定精度指标，就有必要分析特征定位方法的最坏情况的精度，文中用分析和实验的方法给出了基于空间矩的边缘定位方法，对于边缘点，边缘直线以及直边缘区域的最坏情况定位精度分析。分析和讨论的结果不但可以用来确定已知形状位置估计的最大误差，而且还可用于对准的形状几何参数，以获得较高的精度。     

锥形有源条半导体光放大器增益和饱和特性分析

以行波半导体光放大器速度方程为基础，采用传输矩阵方法，对锥形结构半导体光放大器的增益和饱和特性进行理论研究。讨论了不同锥形长度，不同结构时的增益和饱和特性差异。理论研究表明，锥形结构能改善半导体光放大器的偏振灵敏度。在同一锥度下，长锥形长度能提高饱和增益，降低偏振度。在进行半导体光放大器有源条结构设计时要综合考虑锥度及锥形长度的影响，以实现结构优化 。     

Fraunhofer全息图无透镜再现中的傍轴几何光学理论

运用相因子判断法，全面研究了Ｆｒａｕｎｈｏｆｅｒ全息图无透镜再现象的物像共轭关系，放大率关系；在傍轴条件下，针对各种形态的记录方式，分析了记录和再现的各种因素成像规律的影响，确切完整地给出了傍轴几何光学理论的数学表达和物理解释，并在实验上进行了验证。     

Disparity field and depth map coding for multiview 3D image generation

In the present paper techniques are examined for the coding of the depth map and disparity fields for stereo or multiview image communication applications. It is assumed that both the left and right channels of the multiview image sequence are coded using block- or object-based methods. A dynamic programming algorithm is used to estimate a disparity field between each stereo image pair. Depth is then estimated and occlusions are optionally detected, based on the estimated disparity fields. Spatial interpolation techniques are examined based on the disparity/depth information and the detection of occluded regions using either stereoscopic or trinocular camera configurations. It is seen that the presence of a third camera at the transmitter site improves the estimation of disparities, the detection of occlusions and the accuracy of the resulting spatial interpolation at the receiver. Various disparity field and depth map coding techniques are then proposed and evaluated, with emphasis given to the quality of the resulting intermediate images at the receiver site. Block-based and wireframe modeling techniques are examined for the coding of isolated depth or disparity map information. Further, 2D and 3D motion compensation techniques are evaluated for the coding of sequences of depth or disparity maps. The motion fields needed may be available as a byproduct of block-based or object-based coding of the intensity images. Experimental results are given for the evaluation of the performance of the proposed coding and spatial interpolation methods.