互联网上基于对等网络的消息通信编程环境

描述了一个互联网上基于时等网络的消息通信编程环境P2PE(P2P-based programming environment).P2PE利用对等网络的JXTA协议采组织互联网上的各种节点,形成一个应用层的覆盖网络.P2PE把基于对等网络的计算资源共享平台的功能需求划分为服务的形式,该服务可以被对等节点或节点组利用.通过提出具有质量保证的消息,实现了消息通信过程的同步异步通信、远程过程调用、动态的数据传输.测试与性能分析表明,P2PE在处理分布式计算的消息通信问题上,轮回时间、消息队列的效率、远程过程调用的开销、吞吐量等都有较好的性能.     

基于Internet的分布式供能远程监控系统

本文介绍了应用于分布式供能的基于Internet的远程监控系统及监控系统的组成,并探讨了其中的关键技术。远程监控系统程序使用VB进行编写,通过Internet进行远程数据传送,下位控制器负责现场设备控制和采集系统的运行数据,IPC进行现场运行监控和数据分析处理并作为远程监控服务器。通过实际应用,表明远程监控系统可以满足分布式供能系统远程监控的要求,对分布式供能系统的推广有很大的促进作用。     

A voicing-driven packet loss recovery algorithm foranalysis-by-synthesis predictive speech coders over Internet

In this paper, a novel voice-driven adaptive packet loss recovery algorithm is proposed to lessen the possible voice degradation and error propagation for analysis-by-synthesis speech coders in Internet applications. After voicing classification, we adaptively adopt random noise generation, multiresolution excitation generation, or pulse tracking procedure to recover the lost packets, By applying the algorithm to the G.723.1 coder, simulation results show that the proposed algorithm is superior to the recovery algorithm embedded in the G.723.1 standard through the subjective evaluation     

Single-channel speech enhancement using implicit Wiener filter for high-quality speech communication

International Journal of Speech Technology - Speech enables easy human-to-human communication as well as human-to-machine interaction. However, the quality of speech degrades due to background...     

Using the Internet for speech research: an evaluative study examining affect in speech

The Internet has rarely been used in auditory perception studies due to concerns about standardisation and calibration across different systems and settings. However, not all auditory research is based on the investigation of fine-grained differences in auditory thresholds. Where meaningful ‘real-world’ listening, for instance the perception of speech, is concerned, the Internet may be a more appropriate and ecologically valid setting to collect data. This study compared affective ratings of low-pass-filtered infant-, foreigner- and British adult-directed speech obtained with traditional methods in the laboratory, with those obtained from an Internet sample. Dropout rates and demographic distribution of participants in the Internet condition were also assessed. The results show that affective ratings were similar for both the Internet and laboratory samples. These findings indicate the viability of Internet-based research into affective speech perception and suggest that precise acoustic environmental control may not always be necessary.     

IntelliBid: An Event-Trigger-Rule-Based Auction System over the Internet

This paper presents the design and implementation of an Event-Trigger-Rule-Based auction system called IntelliBid. A network of Knowledge Web Servers, each consisting of a Web server, an Event-Trigger-Rule (ETR) Server, an Event Engine, a Knowledge Profile Manager, and Bid Servers and their proxies constitutes IntelliBid. Together, they provide auction-related services to the creator of an auction site and the bidders and suppliers of products. IntelliBid offers a number of desirable features. First and foremost is the flexibility offered to bidders for defining their own rules to control their bids in an automatic bidding process, which frees the bidders from having to be on-line to place bids. By using different rules, the bidders can apply different bidding strategies. Second, it furnishes valuable statistical information about past auctions to both suppliers (or sellers) and bidders. The information can assist a bidder in bidding and a seller in setting a reasonable base price and/or the minimum incremental price. Third, since rules that control the automatic bidding are installed and processed by the ETR servers installed at bidders' individual sites, bidders' privacy and security are safeguarded. The statistical information that is released by IntelliBid only depicts the trend of the bidding prices of a product. The information about bidders is kept completely secret, thus safeguarding the privacy of the bidders. Fourth, IntelliBid's event, event filtering and event notification mechanisms keep both bidders and suppliers timely informed of auction events so that they or their software system can take the proper actions in the auction process. Fifth, any registered user of IntelliBid, bidder or supplier, can monitor the bids placed to any product being auctioned in IntelliBid. Sixth, IntelliBid allows bidders to do both on-line (or manual) bidding and automatic bidding. It also allows a bidder to participate in several auctions at the same time, in both manual and automated modes. The bidding of a product can depend on the result of the bidding of another product. Last, but not least, IntelliBid allows a person or organization to play both the role of bidder and the role of supplier simultaneously. The Profile Manager keeps the information as a bidder and information as a supplier separately. Moreover, IntelliBid's architecture uses a parallel event management system to do event registration and notification. This paper also reports the result of a performance study on the implication of using such a parallel system to achieve scalability.     

Fight Spam on the Internet!

Spam is flooding the Internet with many copies of the same message．in an attempt to force the rnessage 0n peopie who would not otherwise choose to receive it,You have probably seen an increase in the amount of “junk mail”which shows up in your email box，cr on your favorite newsgroup.The activities of a small number of people are becoming a bigger problem for the Internet.     

多信息感知辅助的网络遥操作机器人系统

构建了多信息感知辅助的网络遥操作机器人系统,该系统提供了一种通过多信息感知手段辅助操作者决策的远程控制方式．首先,分析了网络条件下遥操作机器人系统多信息感知的原理．该多信息包括机器人多传感器和网络返程时延等信息．通过对这些多信息的预处理、分类和决策处理,将该多信息以视觉、听觉、力觉、报警灯和交互文本方式转化为人可感知的信息．使用网络时延缓冲器和网络双连接,降低了网络可变时延对系统的影响．最后,长距离的网络遥操作实验验证了系统和控制策略的实用性和有效性．     

A cross-layer communication module for the Internet of Things

The Internet of Things (IoT) is a novel networking paradigm which allows the communication among all sorts of physical objects over the Internet. The IoT defines a world-wide cyber-physical system with a plethora of applications in the fields of domotics, e-health, goods monitoring and logistics, among others. The use of cross-layer communication schemes to provide adaptive solutions for the IoT is motivated by the high heterogeneity in the hardware capabilities and the communication requirements among things. In this paper, a novel cross-layer module for the IoT is proposed to accurately capture both the high heterogeneity of the IoT and the impact of the Internet as part of the network architecture. The fundamental part of the module is a mathematical framework, which is developed to obtain the optimal routing paths and the communication parameters among things, by exploiting the interrelations among different layer functionalities in the IoT. Moreover, a cross-layer communication protocol is presented to implement this optimization framework in practical scenarios. The results show that the proposed solution can achieve a global communication optimum and outperforms existing layered solutions. The novel cross-layer module is a primary step towards providing efficient and reliable end-to-end communication in the IoT.     

移动互联网可信匿名通信模型

针对移动互联网对通信过程的匿名性需求,提出基于签密和可信计算技术设计移动互联网下的匿名通信模型,以实现通信双方间的匿名通信。该模型中,中间节点根据前驱节点的签密信息鉴别转发数据的完整性,验证转发链路的真实性。分析表明该模型在实现通信匿名的同时具有安全性与可信性,满足移动互联网下移动终端匿名通信过程的安全需求。     

Resource allocation for multimedia streaming over the Internet

This paper addresses the resource allocation problem for multiple media streaming over the Internet. First, we present an end-to-end transport architecture for multimedia streaming over the Internet. Second, we propose a new multimedia streaming TCP-friendly protocol (MSTFP), which combines forward estimation of network conditions with information feedback control to optimally track the network conditions. Third, we propose a novel resource allocation scheme to adapt media rate to the estimated network bandwidth using each media's rate-distortion function under various network conditions. By dynamically allocating resources according to network status and media characteristics, we improve the end-to-end quality of services (QoS). Simulation results demonstrate the effectiveness of our proposed schemes     

Transformation-based reconstruction for real-time voicetransmissions over the Internet

We explore the loss behavior encountered in transmitting real-time voice over the Internet and propose a new loss-concealment scheme to improve its received quality. One known technique to conceal loss is to send interleaved streams of voice samples and reconstruct missing or late samples by interpolation at the receiver. Based on this method, we propose a new transformation-based reconstruction algorithm. Its basic idea is for the sender to transform an input voice stream, according to the interpolation method used at the receiver and the predicted loss behavior, before interleaving the stream. The transformation is derived by minimizing reconstruction error in case of loss. We show that our method is computationally efficient and can be extended to various interleaving factors and interpolation-based reconstruction methods. Finally, we show performance improvements of our method by testing it over the Internet     

互联网信息三级巡控体系的构建

随着互联网的迅猛发展,互联网信息在给人们生活工作带来了便利快捷的同时,也对互联网管理部门的管理提出了系列问题与挑战。为应对挑战文章提出有效开展互联网信息的三级巡控,对管理部门加强虚拟社会和现实社会的管理具有重要意义。但目前管理部门对于推行互联网信息三级巡控的应对不足,存在诸多问题,急需从理念、机制、管理、制度、措施、保障等多方面去系统科学地建立健全互联网信息的三级巡控体系。     

Distributed robotics over the Internet

We present a communication framework to enable control and collaboration between multiple users over the Internet. We first discuss standard Internet protocols and extensions known as middleware and technologies in the context of Internet telerobotics. A protocol and framework suitable for collaborative telerobotic control are then introduced and discussed. Finally, an example of how the framework might be used for a simple telerobotic system is presented. The system has been tested locally but is not yet freely available on the Internet     

基于Internet的移动短信互通设计方案

通过对国内外移动短信业务的相关分析,提出了M2I2M短信互通方案,其总体架构基于NGN的发展思路。关键是通过对现有手机与Internet之间的短信接口的改进和不同短信网络运营商之间协作调度短信方式的设计,实现手机均无需具有支持Internet业务功能,也可以凭借Internet为透明中介进行短信互通。与其他移动短信互通方案相比,M2I2M方案非常适用于国际用户间的移动短信互通。     

Challenges for the multilingual Web of Data

The Web has witnessed an enormous growth in the amount of semantic information published in recent years. This growth has been stimulated to a large extent by the emergence of Linked Data. Although this brings us a big step closer to the vision of a Semantic Web, it also raises new issues such as the need for dealing with information expressed in different natural languages. Indeed, although the Web of Data can contain any kind of information in any language, it still lacks explicit mechanisms to automatically reconcile such information when it is expressed in different languages. This leads to situations in which data expressed in a certain language is not easily accessible to speakers of other languages.The Web of Data shows the potential for being extended to a truly multilingual web as vocabularies and data can be published in a language-independent fashion, while associated language-dependent (linguistic) information supporting the access across languages can be stored separately. In this sense, the multilingual Web of Data can be realized in our view as a layer of services and resources on top of the existing Linked Data infrastructure adding (i) linguistic information for data and vocabularies in different languages, (ii) mappings between data with labels in different languages, and (iii) services to dynamically access and traverse Linked Data across different languages.In this article, we present this vision of a multilingual Web of Data. We discuss challenges that need to be addressed to make this vision come true and discuss the role that techniques such as ontology localization, ontology mapping, and cross-lingual ontology-based information access and presentation will play in achieving this. Further, we propose an initial architecture and describe a roadmap that can provide a basis for the implementation of this vision.     

一种面向Internet视频会议应用的码率控制方案

该文根据Internet视频会议的特点,参考了网络视频应用的经验,综合了一些常见的码率控制算法,设计并实现了一种含有用户反馈的码率控制策略,以及包括I帧频率控制、编码帧的选择、量化参数估计的一套码率控制方案。模拟试验表明,在不同信道速率条件下,实现了视频时域质量和空域质量的良好折中,使视频速率与信道速率得到良好匹配。     

Data Transfer Over the Internet for Real Time Applications

Efficient real time data exchange over the Internet plays a crucial role in the successful application of web-based systems. In this paper, a data transfer mechanism over the Internet is proposed for real time web based applications. The mechanism incorporates the extensible Markup Language (XML) and Hierarchical Data Format (HDF) to provide a flexible and efficient data format. Heterogeneous transfer data is classified into light and heavy data, which are stored using XML and HDF respectively; the HDF data format is then mapped to Java Document Object Model (JDOM) objects in XML in the Java environment. These JDOM data objects are sent across computer networks with the support of the Java Remote Method Invocation (RMI) data transfer infrastructure. Client's defined data priority levels are implemented in RMI, which guides a server to transfer data objects at different priorities. A remote monitoring system for an industrial reactor process simulator is used as a case study to illustrate the proposed data transfer mechanism.