一个简易VoIP系统的设计和实现

描述了在Internet环境下，实现语音交互的关键技术。通过利用Windows的多任务机制，结合Windows MDK低层音频服务、Windows Sockets和语音压缩等技术实现了语音交互系统的基本功能，实现了PC to PC的实时通话。     

用瞬间成型语音集成电路HY061构成的PC机语音板

HY061是一种简单实用的瞬间成型语音集成电路,用它设计构成的PC机语音板不需任何存储器及单片机控制电路,语音清晰,电路简单并可组合多段语音输出,完全满足工业控制中需要输出语音的要求.文中介绍了用HY061构成的PC机语音板的硬件原理及控制软件.     

KCSIPS朝鲜语语音处理系统

在国家自然科学基金会的资助下由中央民族学院和航空航天部710所合作,在IBM PC/XT,IBM PC/AT微型机上研制开发了KCSIPS朝鲜语语音处理系统。该系统不仅能处理朝鲜语的语音信息,而且还能兼容地处理汉语、英语的语音信息。     

基于ActiveX的Web语音控件设计与实现

Internet上的语音通信应用非常广泛。本文对语音通信原理进行分析,利用COM技术和活动模板库(ATL),设计和实现了基于ActiveX的web语音控件,实现了PC之间通过Web浏览器进行实时语音通讯,并能够录音和放音,方便用户通过Web实现语音应用。     

通过并行打印口为PC机扩充语音处理功能

普通的PC机不具备语音处理功能，为使其具有诸如语音录放等语音处理功能，一般可通过在扩展槽上插语音卡的途径解决。这种方法除了价格较高之外，还必须占用计算机的一个扩展槽。下面介绍的方法，其．根本思想是利用PC机的并行打印口以及语音处理电路，使得PC机具有声音处理功能。该方法的优点是接口简单、不占用生机内任何资源、制作费用低、语音质量可以达到使用要求；不足之处是在使用时，须将打印机断开，但这可以通过加转换开关等方法解决。如果PC机本身具有两个以上的并行打印口，则就不存在此问题。并行打印D与语音报接回时功能…     

“声先夺人”的网络语音电话

随着网络技术的高速发展,网络发烧友们已经不再满足于ICQ聊天及电子邮件等文字方式的交谈了,而是渴望在文字交谈的同时,也能同其他在线的朋友进行PC to PC的语音交谈。能进行文字交谈,又能进行语音聊天的网络语音电话软件很多,但限于国内目前的网络速度,很多网络语音软件的通话效果都不够理想。“功夫不负有心人”,通过不断的试用,笔者终于发现了一款通话效果颇佳的网络语音软件──V2 Communicator。　　V2 Communicator是V2公司自主开发的国内第一款优秀网络语音通信软件,具有小巧玲珑的身材、个性化的外观设计、优良的语音…     

基于Java的网络电话系统设计与实现

采用Java技术设计开发一个网络电话系统,实现PC到PC间的语音通话,经测试在语音和时延上都满足实际通话的需要。详细叙述电话系统的工作流程和设计要点,并阐述本系统软件的特点。     

基于互联网语音交互系统的研究与实现

本文研究与分析了目前IP电话的现状,描述了在Internet环境下,实现语音交互的关键技术。并利用现有的硬件设施和技术力量,研究Windows的多任务机制,通过Windows MDK低层音频服务、Windows Sockets网络编程和音频压缩等技术实现了语音交互系统的基本功能,实现了PC to PC的实时通话。     

嵌入式网络终端的语音传输系统设计

根据嵌入式网络终端的特点及VOIP技术原理,设计了一款基于WinCE的嵌入式语音传输系统。此系统实现了嵌入式网络终端之间的语音通信,以及网络终端和PC机之间的语音通信功能,具有较强的可扩展性。     

PSTN语音信息查询服务系统开发

以AirVoice为例,介绍基于PC／MODEM的PSTN语音信息查询服务系统的开发技术。对PSTN语音信息查询服务系统的结构、类型、功能以及开发中的关键技术进行了说明。重点讨论了利用VB串行通信控件和MODEM语音AT指令集实现PSTN语音通信控制的技术实现方法。     

Assessing Ideational and Evaluative Skills and Creative Styles and Attitudes

This article describes the rationale for the multiphase creative problem solving process, and reports the findings from an empirical investigation conducted to facilitate the problem solving of managers. The ideational skills of the managers were assessed before and after training in a complete process of creative problem solving, along with their ideational attitudes, creative problem solving style (i.e., generator, conceptualizer, optimizer, or implementor), and evaluative skill (i.e., ability to recognize original ideas). The most important findings indicated that the training had a significant impact on the evaluative accuracy of the managers. They were significantly more accurate in their judgments about original ideas after training, both in their identification of original ideas and their recognition of unoriginal ideas. After training, the managers also gave more solutions and more original solutions to problems. Finally, several variables (e.g., the “preference for active divergence” attitude, and the conceptualizer process style) seemed to moderate the impact of training. Training was therefore effective, with specific effects that can be predicted from pre-training individual differences in attitudes and process style.     

Semantics and verification of monitors and systems of monitors and processes

In this paper we present a sound and complete semantics for the monitor concept of C.A.R. Hoare. First a method for specification of monitors, introduced by O.-J. Dahl, is reviewed. This method is based on the relation between the historic sequence of monitor procedure calls and the historic sequence of monitor procedure exits. Based on such specifications and our new monitor semantics we present a method by which it is possible to prove that a concrete monitor is an implementation of an abstract one. In the last part of the paper an axiomatic semantics for systems of concurrent processes and monitors is introduced. The method supports verification by separation of concerns: Properties of the communication to and from each process are proven in isolation by a usual Hoare style axiomatic semantics, while abstract monitors are also specified in isolation by the method reviewed in the first part of the paper. These properties of the components of the system are then used in a new proof rule to conclude properties of the complete system. Stein Gjessing received a Ph.D. (actually a Dr. philos.) from the University of Oslo (Norway) in 1985. Presently he is an Associate Professor at the Institute of informatics, University of Oslo, Norway. Dr. Gjessings research interests are in the area of concurrent and distributed programming, operating systems, formal specification and verification and programming languages.     

Integrating and automating analysis and optimization

The development of an interface coupling program on personal computers for an analysis software system such as ANSYS, SAP, etc. and an optimization software system, MOST, is presented. By controlling and directing the communications the interface coupler integrates the two programs while retaining their versatility and interactive features. The integrated system is used to solve a numerical example of active noise control for a three-dimensional enclosure, in which an energy density level of control points is minimized by adding the sound source to cancel the unwanted noise. The interface coupling program automates with relatively low cost the iterative process for designing an engineering system, remaining flexible in acoustical modelling and efficient in equation solving. Also, the coupling interface is developed in a general-purpose way so that it can be expanded easily to integrate more analysis software packages of different kinds.     

国内外标准法规比对分析系统设计与实现

为发现我国国家标准与国外发达国家标准法规的差距,从根本上提高我国国家标准的总体质量,提升我国产品的质量安全水平,以关键指标(因子)为核心,研究国内外标准法规比对的工作流程,利用面向对象的方法设计,实现了国内外标准法规比对分析系统。该系统适用于所有产品国内外标准法规的比对工作。