多线程语音聊天系统的设计与实现

分析了语音聊天系统研制中的几个技术难点，包括语音录制、压缩、传输、播放，解放了录放音的消息处理、多线程与多级冲机制在该系统中的运用以及音频压缩解压问题，使该系统的语音通信效果连贯、流畅。     

基于STM32和Speex编解码的录音设计与实现

Speex工程着力于通过提供一个可以替代高性能语音编解码来降低语音应用输入门槛。设计基于STM32F401系列单片机和Speex编解码算法,实现了录音的功能。设计主要分为音频采集的ADC部分、基于Speex算法的音频编码压缩部分以及效果验证部分。通过验证,该设计可以较好地实现录音功能,并且通过编码减小了内存需求。解压后的音频效果基本符合设计要求,具有一定的应用价值。     

基于语音处理技术的人机交互系统的设计

提出了一种采用SPCE061A单片机构建基于语音处理技术的人机交互系统的设计方案,给出了系统结构,介绍了系统音频输入电路、音频输出电路的设计,详细介绍了语音播放及语音识别功能的软件实现方案。实验测试结果表明,该系统性能良好,语音识别正确率较高,但易受训练和识别环境的影响。     

网络语音电话的设计和实现

本文论述了实现网络语音电话各种技术，其中包括使用底层音频函数实现声音的录制与播放，使用音频压缩管理实现音频数据的压缩与解压以及使用Winsock实现网络通信等技术。     

基于ARMLinux的嵌入式音频系统设计

介绍了由处理器S3C2410和语音处理芯片UDA1380组成的基于ARMlinux的音频系统的构建.提出了软硬件设计方案,并就音频文件的录制、传输、播放进行了探讨.利用IIs总线,IIC总线实现了音频数据及控制信号的传输,在驱动程序设计中通过使用DMA传输及缓存分段技术提高了对音频数据的实时处理,达到了较好实时性效果,实现了录放同步的音频系统.     

利用盒式录音带作为媒体的声象同步器

介绍最新研制成功半投入使用的电化教学仪器。它采用数据编码,调制和解调技术,将语音信息和相应的文字图像信息处理成语音形式录制在普通录音磁带上,声象同步器在播放磁带时,同步输出音频的语音信息和视频的图象信息,达到视听结合的教学效果,当暂停播放磁盘时,能重播放上一段的语音信号,与计算机结合使用,能编辑制作声象教材。     

基于VC++的语音信号的采集和处理

在Windows音频设备、Matlab和Visual C++6.0的基础上,设计了基于PC机的语音信号采集和处理系统,该系统实现了对录制的语音信号进行原声效果、混响效果、回声效果、音调升高效果和音调降低处理后进行播放的功能。     

Windows环境下特殊声音效果的动态实时处理技术

本文分析了Windows低层音频服务的运行机制,介绍了使用低层音频函数对播放与录制的数据进行实时动态处理的技术方法。     

Windows环境下特殊声音效果的动态实时处理技术

本文分析了Ｗｉｎｄｏｗｓ低层音频服务的运行机制，介绍了使用低层音频函数对播放与录制的数据进行实时动态处理的技术方法。     

局域网音频信息实时传送的实现方案

介绍了波形音频的一些概念,详细讲述了在VC++6.0中录制与播放音频数据的方法,并提供了一种网络实时共享语音信息的实现过程.     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

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。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

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.