Abstract:Skeleton transform is an important operation in digital image processing. The existing methods for skeleton transform are either complicated or time consumed, so a simple and fast method is presented. It uses a landing and taking-off method to implement 2

Abstract:The high efficient transmission of the digital image is very important for the wireless multimedia communication and network image exchange. The digital image transmission technique with actively discarded image block adapting to the channel is put forwar

Abstract:A conception and algorithm of wavelet packet energy feature is presented and applied to feature extraction of five types of typical ground target echoes. The computation results of distance measure show that the separability of wavelet packet energy featu

Abstract:A new algorithm using digital image as watermark is presented. The block-based DCT coefficient of watermark is embedded in image intermediate frequency randomly. It enhances the security and robustness of embedded watermark greatly.

Abstract:A new technology for the segmentation and recognition of the nameplate of video moving object is presented. The system consists of three modules, object detection module, nameplate segmentation module and recognition module. The experiment is carried out

Abstract:A theory constructing the absorbing boundary condition (ABC) for differential methods in frequency domain is concluded. By choosing adapted parameters, some existing absorbing boundary conditions are derived from the unified form. After the reflection coe

Abstract:已有的对雷达起伏目标理论的研究，只涉及对所谓0类、I类、Ⅱ类、Ⅲ类、Ⅳ类目标的情况。其中0类是不起伏目标，I、Ⅱ类是分别按瑞利分布作一致起伏和独立起伏的目标，Ⅲ、Ⅳ类是按另一种设定规律作一致起伏和独立起伏的目标。本文研究了一种按Rice分布起伏的目标，得出了在这种情况下雷达目标的检测概率与积累脉冲数、要求的平均信噪比及噪声超过门限的概率间的关系，并用曲线图表达了这些结果。

Abstract:在基于CC-NUMA结构的高性能计算机上，研究三维空间非理想爆轰波传播的并行化计算。通过对原串行程序进行分析与测试，确定了以曲率计算、第一次差分计算和第二次差分计算等为并行化的重点。结合并行机结构特点，采用“分而治之”和负载平衡等并行处理技术，将串行程序转化成并行程序。在高性能服务器上进行数值模拟计算与测试表明，爆轰波传播并行程序的运算速度得到了大幅度的提高。

Abstract:The framework and key techniques of real-time remote tracing visualization system is introduced. Such crucial problems as program connection, data transferring efficiency and program interaction control are solved. Finally, a prototype system based on the

Abstract:A reasonable focusing system is set up using the precondition transporting stably intense beams in an alternate focusing solenoid field and the focusing system can confine Corkscrew oscillations. The experimental results show that the increase of the cent

Abstract:Finite element method (FEM) is applied to analyze the structure of symmetric beam-proof mass of micro silicon acceleration sensor in static field as well as dynamic filed. The regular effect patterns of the structures dimensions on its displacement, reson

Abstract:Blind source separation (BSS) is a recently developed methodology used to separate unknown source signals from their mixtures. It has been applied to many fields widely and effectively. The theory and two types of implementation methods-independent compon

Abstract:Based on the limitation of the Current Terrestrial System, the necessity of the future Air Navigation System CNS/ATM being developed rapidly, its significant economic benefits and its technical basis are mainly described. Then, the system composition and

Abstract:Based on three generally accepted basic hypotheses, the definition of environmental factor and restricting conditions of constant failure mechanism are discussed.The research status and common study methods of environmental factor are reviewed. Finally, a