九江学院图书馆整体千兆网络升级改造方案和建设   总被引：3，自引：0，他引：3  

徐诗涛  李兵  冯莲  谢丽君 《现代图书情报技术》2005,21(5):88-90

以九江学院图书馆为例，简述升级千兆网络所涉及布线方案、网络硬件设备及辅助设备等几个方面的改造构建过程。  相似文献   

The impact of immediate test score reporting on university students' achievement emotions in the context of computer-based multiple-choice exams     

《Learning and Instruction》2017

Test-taking is an emotion-laden event for many students. Typically, negative emotions are highest at the start of an examination and are replaced by positive emotions as the exam progresses. The impact of computer-based testing and immediate score reporting on students' emotions has not been examined. In Study 1, we evaluated university students’ emotions at the end of a computer-based exam and found positive emotions more strongly endorsed than negative. In Study 2, we replicated this finding and used a quasi-experimental pre-post design to examine how emotions changed in response to real examination scores. Exam scores presented immediately had significant positive effects on relief, pride, and hope and negative effects on anxiety and shame even after controlling for the corresponding emotion at the end of the exam. The one exception was anger, which was not impacted by examination score. No interaction effects were found.  相似文献   

MIMO离散非线性系统的自适应Backstepping控制     

郭建博  李靖 《许昌学院学报》2006,25(5):29-33

研究MIMO离散非线性系统的自适应Backstepping控制,对包含两个三阶子系统的MIMO系统推出稳定的自适应控制器设计,并利用关键性引理和投影算法的性质证明了闭环系统的所有信号有界和保证跟踪性能.  相似文献   

一个基于两个数学难题的签名方案的改进     

刘益和 《内江师范学院学报》2005,20(2):35-36

对邵祖华等提出的基于两个数学难题的签名方案进行了改进，改进后的方案更具有安全性。  相似文献   

对小波图像去噪方法的探讨   总被引：2，自引：0，他引：2  

张莉  杨国梁 《桂林师范高等专科学校学报》2005,19(1):110-113

小波图像去噪方法已广泛应用于图像去噪领域．在对日前小波图像去噪文献进行综合的基础上，描述了信号奇异性，并阐述了三种基于小波阈值去噪的方法，最后对小波去噪方法进行了一些展望．  相似文献   

可传递关系的算法实现     

李令斗  王敏  李建俊 《洛阳工业高等专科学校学报》2006,16(2):42-43

可传递二元关系的判定是离散数学中的一个难点．对于某个关系来说,判定它是否可传递的方法有许多．本文给出了判断可传递二元关系的一个充要条件,以及在计算机上实现的具体算法．  相似文献   

Optical encryption with cascaded fractional wavelet transforms     

BAO Liang-hua CHEN Lin-fei ZHAO Dao-mu 《浙江大学学报(A卷英文版)》2006,7(8):1431-1435

INTRODUCTION Recently, with the development of science andtechnology, more and more people become interestedin researching image encryption techniques. Manymethods have been proposed for optical image en-cryption. Random phase encoding methods and digi-tal holography techniques are effectively used inencrypting (Javidi and Nomura, 2000; Unnikrishnanet al., 2000a; Hennelly and Sheridan, 2003; Nishchalet al., 2004). Meantime some important properties oflight are used to realize encryptio…  相似文献   

一种基于任意长离散余弦变换的并行递归算法     

沈宏君 《宁夏师范学院学报》2007,28(6):28-32

基于Clenshaw递归公式以及离散余弦自身的对称性提出任意长离散余弦变换(DCT)的一种并行递归快速算法,给出了算法的滤波器实现结构;与现有的其它递归算法进行了计算复杂度的比较分析,结果表明我们的算法运算量大大减少且计算的滤波器结构使算法非常适合大规模集成电路(VLSI)的实现.  相似文献   

Mathematical methods for modelling price fluctuations of financial times series     

P. Manchanda  J. Kumar 《Journal of The Franklin Institute》2007,344(5):613-636

Statistical and Fourier analysis methods of time series representing fluctuations of stock market in general and Indian stock markets in particular are well known. This work is motivated by a recent paper by Guharay [Operations Research and Financial Engineering, Princeton University, Princeton, NJ, preprint, 2002] where he has studied trends in the S & P 500 for various time periods using wavelet tools. Our paper deals with a few Indian and Saudi stock prices and return fluctuation for a certain period of time. The main objective of the analysis is to understand the dynamics of the Indian and Saudi stock markets. We look for similarities, point of abrupt changes, normalized data, return, volatility, graph, pure and noise part, correlation lengths, and signal-to-noise ratio.  相似文献   

基于混沌特性的小波数字水印算法研究   总被引：1，自引：0，他引：1  

何斌彬  周金财  洪春勇 《科技广场》2007,(5):132-134

为了提高水印信息的隐藏性和安全性,基于混沌序列的优良特性,本文提出了一种用于图像数字水印嵌入和检测的算法。由于混沌序列对初值具有敏感性,攻击者很难从一段有限长度的序列推断出整个混沌序列的初始条件,因此可保证水印信息的安全性。嵌入水印后的图像具有很好的不可见性,并且对常见的信号处理和噪声干扰具有较好的鲁棒性。  相似文献