EBF网络特征映射和恢复及其在鲁棒话者识别中的应用     

李昕  郑宇  江芳泽 《上海大学学报(英文版)》2002,6(4)

The performance of speaker verification systems is often compromised under real-world environments. For example, variations in handset characteristics could cause severe performance degradation. This paper presents a novel method to overcome this problem by using a non-linear handset mapper. Under this method, a mapper is constructed by training an elliptical basis function network using distorted speech features as inputs and the corresponding clean features as the desired outputs. During feature recuperation, clean features are recovered by feeding the distorted features to the feature mapper. The recovered features are then presented to a speaker model as if they were derived from clean speech. Experimental evaluations based on 258 speakers of the TIMIT and NTIMIT corpuses suggest that the feature mappers improve the verification performance remarkably.  相似文献   

Modeling water and carbon fluxes above summer maize field in North China Plain with back-propagation neural networks     

Qin Z  Su GL  Yu Q  Hu BM  Li J 《Journal of Zhejiang University. Science. B》2005,6(5):418-426

INTRODUCTION Dynamics of carbon and water vapor fluxesexchange between the atmosphere and the ecosystembiosphere, depend on complex and non-liner interplayamong physiological, ecological, biochemical andedaphic factors and meteorological conditions (Jarvis,1995; Leuning et al., 1995). There are many studiesquantifying the fluxes across different time and spacescales as well as assessing the environment con-straints on them by some kinds of biophysical orempirical models whose resul…  相似文献   

移动自组网AODV多路径路由研究     

范业仙 《宁德师专学报(自然科学版)》2007,19(2):141-144

AODV协议是唯一通过IETF批准成为RFC文档的移动自组网按需控制路由协议．分析AODV路由协议工作过程及优缺点，并介绍了几种典型的基于AODV的多路径路由改进协议，最后对这些多路径协议进行优缺点分析及性能比较。  相似文献   

A framework of region-based dynamic image fusion   总被引：1，自引：0，他引：1  

WANG Zhong-hua QIN Zheng LIU Yu 《浙江大学学报(A卷英文版)》2007,8(1):56-62

INTRODUCTION Image fusion is a sub-area of more general topics of Information Fusion and Data Fusion and deals with static images and dynamic images (image sequences or video data) (Maitre and Bloch, 1997). By com-bining the information from a range of image data obtained by different sensors or the same sensor with different imaging schemes, the composite image al-ways presents the complementary information of different input images at the same time and provides us the integrated descr…  相似文献   

Hybrid ants-like search algorithms for P2P media streaming distribution in ad hoc networks     

ZUO Dong-hong DU Xu YANG Zong-kai 《浙江大学学报(A卷英文版)》2007,8(8):1191-1198

Media streaming delivery in wireless ad hoc networks is challenging due to the stringent resource restrictions,po-tential high loss rate and the decentralized architecture. To support long and high-quality streams,one viable approach is that a media stream is partitioned into segments,and then the segments are replicated in a network and served in a peer-to-peer(P2P) fashion. However,the searching strategy for segments is one key problem with the approach. This paper proposes a hybrid ants-like search algorithm(HASA) for P2P media streaming distribution in ad hoc networks. It takes the advantages of random walks and ants-like algorithms for searching in unstructured P2P networks,such as low transmitting latency,less jitter times,and low unnecessary traffic. We quantify the performance of our scheme in terms of response time,jitter times,and network messages for media streaming distribution. Simulation results showed that it can effectively improve the search efficiency for P2P media streaming distribution in ad hoc networks.  相似文献   

区间时变细胞神经网络周期解的鲁棒指数稳定性     

陈安平  曹进德  黄立宏 《湘南学院学报》2004,25(2):5-11

本文研究一类区间时变扰动神经网络系统周期解的鲁棒指数稳定性.获得了一系列关于鲁棒指数稳定性的判据.  相似文献   

A Technique for Automatically Scoring Open-Ended Concept Maps     

Ellen M. Taricani  Roy B. Clariana 《Educational technology research and development : ETR & D》2006,54(1):65-82

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试论高等院校图书资料资源的网上共享     

李端 《河南广播电视大学学报》2001,(4):9-10,15

随着计算机网络的广泛应用，高校师生获取信息、组织信息、使用信息方法和观念的进一步改变，传统的以印刷介质为主要媒体的图书资料系统，已远远不能适应时代的发展，建立数字化、网络化的新型图书资料系统势在必行。本文从实现共享的必要性、可能性，以及文献数据库和网站的建立、维护、更新等方面做了简要的论述，为高校图书资料系统之间实现资源的网上共享提出了方法和途径。  相似文献   

报网互动：传统报业谋求发展的必由之路     

徐凌 《南通师范学院学报》2011,(5):135-140

数字时代的新媒体发展对传统媒体的生存和发展提出了更大的挑战。如何突围,取得新优势,获得新发展是传统报业急需解决的课题。加强报网互动,进行优势嫁接,实现互融发展,是助推传统媒体＂突围＂的强大引擎,也是传统媒体谋求发展的必由之路。  相似文献   

基于构造-剪枝混合优化RBF网络的煤灰熔点预测方法     

丁维明  吴小丽  魏海坤 《东南大学学报》2011,(2):159-163

为提高煤灰熔点的预测精度,提出了一种基于构造-剪枝混合优化RBF网络的煤灰熔点预测方法.该方法融合了神经网络构造算法和剪枝算法的优点,分为“粗调”和“精调”2个阶段.粗调阶段动态增加隐节点数目直至满足相应的停止准则;精调阶段对粗调得到的RBF网络的结构和参数作进一步调整.基于煤灰的化学组成成分建立相应的构造-剪枝混合优...  相似文献