基于MATLAB的DHMM、DTW和CHMM语音识别算法的对比研究

在对语音识别基本理论阐述的基础上,研究了DHMM、DTW和CHMM三种不同的语音识别算法,并通过在MATLAB环境下搭建孤立词数字语音识别系统得出三种不同语音识别算法的具体运行数据,验证了识别理论的正确性,对比三种不同语音识别算法优缺点,为硬件实现语音识别系统提供了重要参考。     

基于云计算和语音识别的控制系统

近年来,随着语音控制的热度逐渐增加,语音助手的种类也越来越多,但该类应用通常都是通过语音识别技术 来实现对用户指令的识别和反馈。本文所介绍的软件是一款基于云计算和语音识别的控制系统,和传统语音识别应用不同的 在于其语音识别的方式采用了本地语音识别,结合云计算和物联网传感器进行信息的处理。     

语音识别技术的研究与发展

回顾了语音识别技术的发展历史,描述了语音识别系统的基本原理,介绍了语音识别的几种基本方法,并对语音识别技术面临的问题和发展前景进行了讨论.     

语音识别的研究

介绍了语音识别的发展历史和国内外语音识别研究的现状，讨论了语音识别的几个基本问题和影响语音识别的因素，并分析了目前常用的语音识别的各种方法，指出了其优缺点，最后讨论了评价语音识别系统时应考虑的几个技术指标和将来语音处理的发展方向等。     

面向大词汇量的维吾尔语连续语音识别研究

近年来大词汇量连续语音识别技术得到了迅速的发展,国内外研究机构加大了对汉语和英语语音识别技术的研究,然而,维吾尔语语音识别技术的研究工作最近才起步。建立了面向大词汇量的维吾尔语语音语料库,研究了维吾尔语声学模型和语言模型建模技术、解码技术,进行了面向大词汇量的维吾尔语连续语音识别实验。对维吾尔语大词汇量连续语音识别技术进一步发展中存在的问题进行了讨论。     

BP神经网络应用于孤立词语发音识别的研究

介绍了BP神经网络的学习规则和用于语音识别的基本原理,建立了一个用于常用孤立词语音识别的BP神经网络,选择声道反射系数为语音识别的特征值,建立了网络的训练样本集,对网络进行了训练;用MATLAB进行了识别仿真,表明能较好地实现孤立词语音识别.     

语音识别技术评述

本文对语音识别技术作了评述,包括语音识别的基本原理,语音识别的发展历史,语音识别的主要方法一特征参数匹配法、隐马尔柯夫法和神经网络法,语音识别的难点及对策,语音识别的发展方向与应用前景．     

语音情感识别综述

人类的语音情感变化是一个抽象的动态过程,难以使用静态信息对其情感交互进行描述,而人工智能的兴起为语音情感识别的发展带来了新的契机。从语音情感识别的概念和在国内外发展的历史进程入手,分别从5个方面对近些年关于语音情感识别的研究成果进行了归纳总结。介绍了语音情感特征,归纳总结了各种语音特征参数对语音情感识别的意义。分别对语音情感数据库的分类及特点、语音情感识别算法的分类及优缺点、语音情感识别的应用以及语音情感识别现阶段所遇到的挑战进行了详细的阐述。立足于研究现状对语音情感识别的未来研究及其发展进行了展望。     

语音识别的智能门控系统设计

该智能门卫系统采用语音识别技术.在陵阳单片机SPCE061A上实现.硬件部分主要由SPCE061A单片机、电源与门控电路、外扩存储器SPR4096、音频输入与输出电路等组成.主要技术是该单片机在语音识别中的应用和对门控电路的设计.该系统软件部分由语音训练模块、语音识别模块、语音数据处理模块、语音播报模块和密码输入与确认模块组成,通过对系统的初始化和识别训练实现了语音数据的采集、特征提取、特定语音识别和语音播放等功能.根据语音识别算法原理,对语音信号的预处理、特征提取、模式匹配做了分析.该系统实验结果表明,系统性能稳定,识别效果好,可用于家庭或小型办公场所的门锁控制.     

基于VC的语音识别技术研究

本文设计了一个基于VC的语音识别软件,其主要功能有语音信号的录制、预处理及识别语音。通过实验表明,系统能够达到简单识别语音的要求。     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.     

Editorial: Special issue on recent advances in hybrid control theory and applications

正The demands of a rapidly advancing technology for faster and more accurate controllers have always had a strong influence on the progress of automatic control theory.In recent years control problems have been arising with increasing frequency in widely different areas,which cannot be addressed using conventional control techniques.The principal reason for this is the fact that a highly competitive economy is forcing systems to operate in regimes where     

Information for Authors

正Aim The Journals of Zhejiang University-SCIENCE(A/B/C)areedited by the international board of distinguished Chinese andforeign scientists,and are aimed to present the latest devel-opments and achievements in scientific research in China andoverseas to the world’s scientific circles,especially to stimulateand promote academic exchange between Chinese and for-eign scientists everywhere.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.