负载状态下电机噪声的声强法测定

现有标准电机噪声均是在空载状态下测定的。显然负载状态下噪声测定更有意义。本文阐述了用双传声器互谱法测量声强的基本原理；用声强法测定各种环境条件下电机负载时的噪声，并与声压法结果作了比较；论述了在负载状态下测量电机噪声的必需性和可实现性。最后介绍了作者研制的多功能便携式智能声强测量仪的特点及其组成。     

多媒体教学中电视卡和视频的应用与实践

我所在的是一高职院校，比较注重对学生实践和动手能力的培养，在计算机专业教学中，《多媒体技术与应用》课程有一部分关于电视卡和数据压缩技术的介绍，但内容相对来说比较简单，而且实践的安排基本没有。而随着电脑的普及和电视卡价格的下降．电视卡的功能和应用越来越引起了学生们的关注和兴趣，所以在教学中适当增加这部分内容的讲解及实践既满足了学生的要求．保存下来的电视材料又为后面做视频处理做了很好的素材准备工作，而且为了保存这些庞大的视频文件，也为数据压缩技术的知识与实践提供了条件，使得以前这些枯燥乏味的知识变得丰富多彩起来。当然这些知识在实际生活中也是非常有用和有趣的。     

A preliminary investigation of cognitive flexibility for emotional information in major depressive disorder and non-psychiatric controls.

Clinical research suggests that individuals with major depressive disorder (MDD) are cognitively inflexible, exhibiting ruminative, rigid, and automatic thoughts within a negative schema. However, existing neuropsychological research on cognitive flexibility in this population has not employed emotional stimuli. Because research suggests that the performance of individuals with MDD is modulated when emotional stimuli are used, this study investigates the impact of emotional stimuli on cognitive flexibility performance through a novel emotional modification of the Wisconsin Card Sorting Test. Controls were less flexible when stimuli were positive and individuals with MDD were less flexible when stimuli were negative relative to the controls. These divergent styles of responding to emotional information may contribute to the relative risk or protection from depressed mood. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

基于DSP的硬盘数据加密系统

描述了一种基于动态加密的加密系统，给出了系统设计的总体方案，并对系统的软硬件设计进行了论述。在实际使用中已经证明，该加密系统是一个高效合理的处理系统。     

“旅游一卡通”系统的研究与设计

通过分析河南旅游的特点,对“旅游一卡通”系统进行了研究与设计。文章阐述了“旅游一卡通”的功能,并对系统的总体设计进行了研究。分析了传统三层应用软件系统的不足,提出了一个适合该系统运行的新的四层体系结构。文章的最后提出了一个“旅游一卡通”计费系统模型.该模型利用了目前国内比较热门的业务规则管理技术,使计费规则与程序代码完全分开,便于计费规则的灵活运用。     

声强法在柴油机表面辐射噪声源识别中的应用

根据声强测试原理，应用B＆K 3560C便携式振动与噪声测试系统中的声强测试模块，对4190型柴油机的表面辐射噪声源进行识别。绘制了三维声强图，找出了该发动机的各个辐射面上的主要噪声源，并对其进行了排序，分析了这些噪声源的产生根源。提出了控制主要噪声源的一些建议，以便于进一步降低该柴油机的噪声水平。     

An asymmetric fingerprint matching algorithm for Java Card TM

We propose a light-weight fingerprint matching algorithm that can be executed inside the devices with a limited computational power. The algorithm is based on the minutiae local structures (the “neighborhoods”), that are invariant with respect to global transformations like translation and rotation. The match algorithm has been implemented inside a smartcard over the Java Card^TM platform, meeting the individual’s need for information privacy and overall authentication procedure security. The main characteristic of the algorithm is to have an asymmetric behavior, in respect to the execution time, between correct positive and negative matches. The performances in terms of authentication reliability and speed were tested on some databases from the Fingerprint Verification Competition 2002 and 2004 editions (FVC2002 and FVC2004). Moreover, our procedure showed better reliability when compared with a related algorithm on the same database. We can achieve a false acceptance rate (FAR) of 0.1%, a false rejection rate of about 6%, and from 0.3 to 8 s to match most of the finger pairs during the FAR tests.     

音频编辑软件中的高手——GOIdWave

介绍声音编辑软件GoldWave的基本使用方法，如获取音频、编辑声音和制作音频的特殊效果等。     

封闭声场数值模拟系统SOFIS原理及设计

结合统计学方法，对模拟声场脉冲响应的算法进行了改进，使之可用于模拟非矩形空间，有障碍物或吸声体的封闭声场。在此基础上利用VisualC 语言和OpenGL图形软件包，研制了一个用于预测声场特性的计算机仿真系统SOFIS，该系统能在同一台计算机上完成声场建模，数值计算和输出结果等工作。论对一个建筑模型进行了仿真，同理论分析比较后可以得出结论，本系统在计算精度，适用范围和计算效率方面都有所改善。     

椭圆曲线加密卡设计与实现

在基于公钥密码体制电子商务中,加密卡是网络认证和通讯加密的硬件设备。文章提出一种利用椭圆曲线密码体制(ECC)加密卡硬件方案。该论文首先给出加密卡安全应用开发与设计体系结构。然后讨论了ECC的数学基础,设计了基本密码算法模型,给出ECC加密卡的各种应用。最后,讨论了加密卡设计中的几个安全问题。