三维激光人体头部扫描技术的研究

介绍了快速3D激光人体头部扫描的原理及装置，从计算机软件和硬件两方面详细讨论了实现三维快速扫描的关键技术，给出了视频分离器的实现原理图以及数据采集卡的实现框图，最后详细讨论了数据处理的实现算法，完成了系统总体设计．     

IC Surface Corrosion Inspection by C-Mode Scanning Acoustic Microscopy

C-mode scanning acoustical microscopy, C-SAM, is widely used in plastic package evaluations and for failure analysis. It permits to detect subsurface delaminations, cracks and pores （air bubbles） for different microelectronics packages. In this study, abnormality was observed in C-SAM daily test, the images showed no delaminations but inhomogeneities on the IC surface. Corrosion was found by optical microscope and scanning electron microscope after decapsulation. It can be revealed as the acoustic impedance is different between corrosion and normal area. The presence of inhomogeneities and discontinuities along ultrasonic waves＇ propagation paths inside the matter causes modifications in the amplitude and polarity of ultrasonic waves. However, C-SAM＇s capability in detecting IC surface corrosion has not been presented. The capability will be illustrated and the inspection mechanism will be discussed in this paper.     

Reaction mechanism for synthesis of Ti2SnC

The reaction mechanism for the formation of Ti₂SnC has been investigated. A mixture of Ti₅Sn₃ and TiC powders was adopted to synthesize Ti₂SnC. It confirms that Ti₂SnC forms from the reaction of Ti₅Sn₃ and TiC. Scanning electron microscopy, differential scanning calorimetry and X-ray diffraction were used to analyze the reaction mechanism.     

抛光型SLAM系统灵敏度研究

以片式电子材料元器件作为无损检测分析对象,以提高激光扫描声学显微镜(SLAM)系统灵敏度为目标,详细分析了入射声波在抛光型分层介质中的传播规律,建立了抛光型样品自由界面动态波纹振幅数学模型。经综合分析获得了提高系统响应的方法,为进一步改进SLAM提供了理论依据。     

提高数字视频监控系统图像质量的技术措施

主要从视频图像的摄取、传输与再传输、处理、显示和回放等环节,讨论了摄像机、传输线、监视器和显示器等设备的选择以及视频图像的压缩、网络传输等关键问题,提出了一些相关技术和要求,保证了视频图像的高清晰、高品质,从而使数字视频监控系统的视频图像质量更佳。     

有限电扫描相控阵天线仿真数学模型

对有限电扫描相控阵雷达的相控阵天线在精跟踪目标过程中的重要地位和作用进行了简述,着重对有限电扫描相控阵雷达的相控阵天线仿真数学模型进行了初步的研究和探讨,给出了平面相控阵天线方向图、天线加权等仿真数学模型,以及雷达直角坐标系到阵面直角坐标系的转换公式,仿真结果表明这种数学模型是可行的。     

现象学的意向性与诗审美意象的生成

诗的美产生于意向性，以有尽之言表无穷之意，以在场的意象表现不在场的情感世界。各个意象与其显现的整体意象之间相互作用，共同构成了诗篇。本文试从现象学的意向性角度探讨诗的美生成的哲学根源，并在一定程度上为人们对诗的认知提供一个较深入的新的视角。     

Effect of austenitization heat treatment on the magnetic properties of Fe-40wt % Ni-2wt % Mn alloy

The effect of austenitization heat treatment on magnetic properties was examined by means of M6ssbauer spectroscopy on an Fe-40wt%Ni-2wt%Mn alloy. The morphology of the alloy was obtained by using scanning electron microscopy （SEM） under different heat treatment conditions. The magnetic behavior of the non heat-treated alloy is ferromagnetic. A mixed magnetic structure including both paramagnetic and ferromagnetic states was obtained at 800℃ after 6 and 12 h heat treatments. In addition, the magnetic structure of the heat-treated alloy at 1150~C for 12 h was ferromagnetic. With the volume fraction changing, the effective hyperfine field of the ferromagnetic austenite phase and isomery shift values were also determined by Mtssbauer spectroscopy.     

基于SIFT特征检测的医学显微图像自动拼接

结合医学显微图像数据特点,将SIFT特征检测算法引入到显微图像的拼接中,克服了传统的基于特征的匹配方法需要原图像有明显的角点或边界信息的弱点,解决了显微镜视野小,无法观察组织切片完整病理图像的问题,该方法经优化后能匹配速度可以达到实时处理的要求。     

基于浮雕处理的红外数字图像鉴伪技术研究?

文中提出了一种对图像进行浮雕处理,然后通过闭运算消除不相关的细节,并用阈值法将图像二值化,最后采用模板匹配的方法进行鉴伪.这种方法取得了良好的试验效果,在实际应用中达到了100%的识别率.