Theory Comparison: Uncertainty Reduction, Problematic Integration, Uncertainty Management, and Other Curious Constructs

This paper compares 3 theories examining the role of communication in producing and coping with subjective uncertainty. Uncertainty reduction theory offers axioms and derived theorems that describe communicative and noncommunicative causes and consequences of uncertainty. The narrow scope of the theory and its axiomatic form are both advantageous and disadvantageous. Problematic integration and uncertainty management theories are comparatively broad, and they exhibit an open, web-like structure. The former theory scrutinizes the complex intersection of probability assessments and evaluations of the objects of these assessments, whereas the latter examines the various ways in which people cope with uncertainty, including sometimes attempting to increase it. The paper also compares meanings of "uncertainty" in the 3 theories as well as the roles played by natural language in the communication-uncertainty interface.     

Organizational Theory, Organizational Communication, Organizational Knowledge, and Problematic Integration

In this paper we argue that 3 traditions of theory about organizational communication have special relevance to the ideas of problematic integration theory. In the rational structure tradition, organizations are described as mechanisms for suppressing or overcoming integration problems, as rationally designed communication processes achieve a system-level resolution that may ignore or override any individually experienced integration problems. In the organizing process theory tradition, values are recognized as important elements guiding organizational sense making or emerging through organizing or learning, but amazingly diverse and unintegrated social structures can stand as resolutions (broadly defined) of integration problems. Finally, in the structurational tradition, the diverse values of organizational groups are treated as emerging and being resolved in many ways in local practice, whereas structural constraints imply that local resolutions will enter into a body of generally relevant organizational knowledge only in limited ways.     

Communication and Uncertainty Management

The fundamental challenge for refining theories of communication and uncertainty is to abandon the assumption that uncertainty will produce anxiety. To better explain processes of communication and uncertainty management, we must answer questions about (a) the experience and meaning of uncertainty, (b) the role of appraisal and emotion in uncertainty management, and (c) the range of behavioral and psychological responses to uncertainty. This paper outlines and extends a theory of uncertainty management and reviews current theory and research in this area. In addition to the theoretical advances promised by this perspective, the paper describes applications to health communication practice. The drive in disease prevention to reduce uncertainty about the state of health and illness has led to a "culture of chronic illness." Constant surveillance of people's health, combined with improved methods for screening and monitoring, virtually guarantee finding something wrong with every person, creating a society divided into the chronically ill and the worried well (i.e., those waiting to be diagnosed).     

传播中的科学技术的不确定性

随着科学技术的日益发展,科学技术的不确定性也变得越来越明显.正确认识科学技术魄不确定性关系到科技的应用、经济的发展,甚至于社会的安定.学校教育和大众传媒作为公众获取科学知识和科技信息的两大重要渠道,在传播科学技术的不确定性上发挥着举足轻重的作用.     

Channel Uncertainty in Ultra-Wideband Communication Systems

Channel uncertainty limits the achievable data rates of certain ultra-wideband systems due to the need to estimate the channel. The use of bursty duty-cycled transmission reduces the channel uncertainty because the receiver has to estimate the channel only when transmission takes place, but the maximum amount of burstiness and hence the possible reduction of channel uncertainty both depend on the spectral efficiency of the modulation scheme used. This general principle is demonstrated by comparing the channel conditions that allow duty-cycled direct-sequence spread spectrum (DSSS) and pulse position modulation (PPM) to achieve the additive white Gaussian noise (AWGN) channel capacity in the wideband limit. We show that duty-cycled DSSS systems achieve the wideband capacity as long as the number of independently faded resolvable paths increases sublinearly with the bandwidth, while duty-cycled PPM systems can achieve the wideband capacity only if the number of paths increases sublogarithmically. The difference is due to the fact that DSSS is spectrally more efficient than PPM and hence allows more bursty transmission     

通信对抗与通信一体化便携设备研究

为适应通信对抗与通信一体化便携使用的需要,对通信对抗与通信一体化便携设备方案进行了介绍,对实现通信对抗与通信一体化便携设备的高灵敏度大动态宽带接收技术、灵巧宽带干扰技术、宽带快速收发转换技术、通信对抗与通信一体化综合技术、热设计技术、硬件模块化、软件构件化等关键技术进行了分析与研究。     

军民融合与卫星通信

本文首先阐述了军民融合的概念,介绍了卫星通信的发展,分析了军民融合的可行性,在借鉴国外军民融合发展卫星通信经验的基础上,提出了我国军民融合发展我国卫星通信的思考和对策。     

Beyond 5G Networks: Integration of Communication,Computing, Caching,and Control

In recent years, the exponential proliferation of smart devices with their intelligent applications poses severe challenges on conventional cellular networks. Such challenges can be potentially overcome by integrating communication, computing, caching,and control(i4C) technologies. In this survey, we first give a snapshot of different aspects of the i4C, comprising background, motivation, leading technological enablers, potential applications, and use cases. Next,we describe different models of ...     

探测通信一体化研究现状与发展趋势

探测通信一体化将独立的探测与通信系统集成一起,通过共用一套硬件设备实现目标探测与信息传输功能,相比传统单一的探测与通信系统,其具有节约平台空间、降低平台能耗以及提高平台安全性等优点。首先介绍国内外陆上雷达通信一体化的相关研究,以及陆上与水下探测通信一体化的区别。结合水声传感网络的应用背景,借鉴雷达通信一体化研究技术,针对探测通信一体化亟需解决的共享波形设计、自干扰抑制以及共享信号处理三个问题,讨论了水下探测通信一体化在单基地、双基地、信息化、安全性方面的发展应用。无论是陆上还是水下,探测与通信作为信息系统的两大功能,两者的一体化设计是系统集成化、信息化、智能化的发展趋势之一。      

雷达通信一体化研究现状与发展趋势

雷达通信一体化通过一套共用的硬件设备实现雷达探测与通信传输,相比于传统单一的雷达或者通信设备,更易集成化、小型化和高效利用频谱。该文系统地介绍了雷达通信一体化的原理与特点,指出了一体化研究中亟需解决的问题,从典型的基于线性调频(LFM)的雷达通信一体化信号出发,全面梳理了国内外针对雷达通信一体化的相关研究,着重归纳了正交频分复用(OFDM)与多入多出(MIMO)技术在雷达通信一体化波形设计、信号处理、一体化系统设计等几个重点方向的研究进展,并分析了雷达通信一体化未来的可能发展趋势及其在军事领域和民用智能交通领域的重要应用前景。

     

A Normative Approach to the Study of Uncertainty and Communication

Uncertainty reduction theory (Berger & Calabrese, 1975) was formulated to explain relationships between the frequency of communication behaviors, level of uncertainty, and level of relational qualities. In this essay, I advocate attention to an alternative set of research questions addressed to the meanings and evaluations of uncertainty and communicative responses to uncertainty. This normative approach entails a shift in focus from measuring level of uncertainty to examining multiple and potentially conflicting meanings of uncertainty, a shift from measuring communication behaviors to evaluating communication practices, and a shift from predicting what people will do to predicting and explaining the effectiveness and appropriateness of what they do in response to uncertainty. Four case studies from various sociocultural contexts illustrate phenomena that are explained by a normative approach to uncertainty and communication.     

浅谈卫星ATM与卫星Internet

本文就卫星通信在ＡＴＭ和Ｉｎｔｅｒｎｅｔ上的应用作了初步探讨，对于卫星通信与ＡＴＭ综合方面，侧重于技术研讨，对于卫星通信与Ｉｎｔｅｒｎｅｔ综合方面，则侧重于具体应用方式。     

Services Integration and Multiplexing for Broad-Band Communication Systems

In broad-band communication networks, a number of services are simultaneously available to the subscriber. The issues of service integration and multiplexing techniques, and their impact on network topologies, are addressed in this paper. Alternative realizations of broadband networks, together with necessary electrical and optical components, are discussed. A comparison between the different alternatives is also made.     

光网络与光子集成的发展(下)

光网络体系中的有源光子集成 高速响应、低啁啾、单稳频集成光子源 半导体分布反馈(DFB)激光器作为光通信的光子源器件已占据不可替代的重要地位,然而DwDM光网络对光子源却提出更高的要求.直接调制DFB激光器受到固有张弛振荡效应的限制,响应速率难以越过5Gb/s,同时在高速率下,频移啁啾效应已比较严重,因此必须采用外调制技术,从光网络体系考虑,调制器宜结构简单并能与DFB激光器实现单片集成.     

无线感知通信一体化关键技术分析

无线感知通信一体化是基于软硬件资源共享或信息共享实现感知与通信功能协同的新型信息处理技术,是6G热点技术之一。在讨论传统无线感知技术方式基础上,重点分析资源一体化、功能一体化和资源功能一体化3种无线感知通信一体化技术模式,并简要阐述了3种技术场景。围绕设备形态和作用距离等关键要素,对不同频段中一体化方案可行性进行了简要分析,并给出了统一的收发机结构设计思路。最后,针对智能体交互场景需求介绍了一体化应用思路。     

山东通信综合业务支撑系统概述

本文从设计背景、设计思路、总体架构、系统功能等几方面对山东通信综合业务支撑系统进行了全面的阐述.     

北部湾区域通信一体化探讨

随着广西北部湾区域一体化进程加快,对通信一体化提出了需求。介绍了通信一体化的内涵及实践进程,分析了北部湾通信一体化建设条件,提出了北部湾实施通信一体化的设想和推动通信一体化的建议。     

基于网络融合的光通信技术研究

分析了网络融合背景,探索新型光纤技术和无源光网络技术,提出了PON技术在5G中的应用方案,设计了一种光载射频技术和无源光网络融合链路系统,通过实验结果的分析验证出系统传输性能良好,最后,展望了光通信技术发展前景.     

三网融合背景下的通信声学

通信声学是声学与信息技术相互渗透融合的产物,随着信号处理技术和电声学技术的发展,其研究和应用领域得到快速扩展.介绍了通信声学的3个主要方向:声接收技术,声传输技术和声发射技术的研究现状和热点.重点探讨了在三网融合背景下,通信声学的应用前景及所面临的挑战.