Abstract:第1期学术论文基于小波变换域的图像加密技术研究………………………………………………………尹显东姚军唐丹等1一种用于无线信道的逐幸存处理均衡器……………………………………………………茹国宝张永强杨浩等6PCM/FM全数字接收机的一种定时误差恢复方法………………………………………………………陈大海张健10低频超宽带SAR定标体散射特性………………………………………………………………………邹鲲梁甸农14一种雷达脉冲的去交错和识别新算法……………………………………………………………………陶荣辉陈惠连18神经网络在

Abstract:The basic concept of Evolvable Hardware(EHW) is introduced.Function Level EHW is explained based on Genetic Algorithm(GA) and Field Programmable Gate Array(FPGA).Meanwhile,the advantage of EHW is discussed.A 4-bit multiplier is obtained at Function Level

Abstract:The elements of median filter are introduced,then a fast 2-D median filter algorithm and its implementation are described.Comparing the fast algorithm and the regular one,the former requires much less resource of the FPGA.So its implementation can reduce

Abstract:Automatic recognition of ellipses and circles is one of the most widely studied topics in the image advantages of the proposed method are its fast speed and high accuracy.In addition,the relevant accuracy can be evaluated right after the recognition.Exper

Abstract:提出了一套完整的参数直接转换算法方案，剖析了AMR（Adaptive Multi Rate）与G729A编码方案在几个关键技术上的差异，并以此为基础详细分析和描述了常见的LSP（LineSpectrum Pair）、基音、随机码本和增益等参数的转换算法，在均方误差意义上对LSP参数转换算法做出了性能评估，对转换以后的语音质量采用PESQ MOS（Perceptual Evaluation of Speech Quality Mean Opinion Score）技术给出了客观评价。本文建议的算法与传统的T

Abstract:According to the electromagnetism modeling research based on the computation method---Finite Difference Time Domain and computer visualization technology,a FDTD MESH Generator System(software) is designed,which has abundant graphic processing functions.By

Abstract:For applying STBC(Space-Time Block Codes) to CDMA(Code Division Multiple Access) system in the multipath fading environment effectively,a method of multipath space-time block decoding is presented to collect the multipath signal energy adequately.Because

Abstract:基于链接序列和软扩频技术的复合扩频系统可同时完成扩频通信和测距任务，相对于传统的导航与定位系统有很大提高。但其本身存在多径干扰、多址干扰等问题，大大限制了复合系统中的用户容量。为此，在深入分析完备互补序列理论的基础上，利用其加修正后特有的抗多径干扰能力，优化系统性能，并对其抗干扰性能进行仿真分析，验证了采用修正互补序列作为链接序列相对于其他序列的优异特性。

Abstract:首先从CQT（Constant Q Transform）和离散傅里叶变换（Discrete Fourier Transform，DFT）比较的角度，对定义CQT的依据以及CQT与DFT的关系作出分析；然后讨论CQT的时域直接计算和频域快速计算；最后分析这一计算方法在音乐的音调分析中所产生的频率误差。本文的分析将为实际应用中CQT算法参数的选取、寻找音阶频率估计误差的修正方法等提供重要参考依据。

Abstract:描述了TI公司媒体处理器TMS320DM642HPI的主要特点，介绍了PCI桥接器PCI2040的结构原理，提出了通过PCI2040实现TMS320DM642与PC／104＋模块进行通信的设计方案。本方案充分利用PCI总线的高数据吞吐能力和DSP的HPI接口功能，可在DSP和PC／104＋模块之间实现较高的数据传输率，实现了PC／104＋实时读／写DSP任意片内存储单元的内容。最后给出交通视频监控系统的设计方案，详细说明了通信过程的软件编程。

Abstract:An IF sampling module based on AD6644 has been designed,which is applied in a PCM/FM telemetry digital receiver and in a wideband radar digital receiver respectively.Experimental results indicate that both receivers can demodulate signals correctly,and re

Abstract:A new high accuracy radio compass system is introduced in this paper.It is small,light,reliable,and is simple in configuration and easy to be realized.Through mathematic analysist,he orientation angle accuracy of the radio compass system is demonstrated a

Abstract:A novel miniaturization planar transformer for high voltage pulse is presented in this paper.Its physical construction and electric parasitic characteristics are also discussed.The transformer made with PCB is of miniature size and high efficiency.Its lea

Abstract:For complete controlling the access to file system,the only way is using filter driver techniques which belongs to OS bottom techniques applied in the fields of data encryption/decryption,virus detection and others.In this paper,the principle of Windows N

Abstract:Data Access Object(DAO) interface technology is simply introduced in this paper.Aiming at practical system,a concrete application that use VC 6.0 to visit Access2000 database is designed.Many key technical problems are studied and solved for visiting Acc

Abstract:To make authentication work more effective is an important subject in network safety.In this paper,the security of the One Time Password(OTP) is analyzed,the working mechanism of one advanced OTP is presented;the reformative OTP authentication system by P

Abstract:The security mode and architecture of product data management system are studied.The hidden security trouble is analyzed,and some corresponding solutions are put forward.Furthermore,a data storage encryption scheme is introduced,which has been applied in

Abstract:As the developing of digital communication and storage technology,a network culture environment can be established basing on content location and push-pull methods.This environment can disseminate information to any intelligent device,which is called Perv

Abstract:支持向量机是在统计学习理论基础上提出的一种新的机器学习方法。由于其出．色尊学习性能，该技术已成为机器学习界的研究热点，并成功地应用在模式识别、时间序列预测、苛线性系统辨识、控制及其它方面。本文简要介绍了支持向量机训练算法及其应用，并且讨论了未来的发展方向。

Abstract:The origination and development of Ridgelet transform are simply narrated.Theories of Ridgelet transform are focused on.Their applications to anisotropic analysis of image processing are mentioned.The merits and shortcomings of several transform in the mo