网络文化是伴随着网络的发展而产生出来的一种文化形态，改变着人们的生活方式和习惯，已经成为人们生活中不可缺少的一部分。然而，网络文化发展繁荣过程中出现的淫秽色情、反动、不良信息传播、网络犯罪等违法行为严重干扰了网上精神家园的健康发展，本文针对网络文化发展繁荣过程中出现的问题，提出了几点建议来保障网络文化健康发展，让互联网成为安全网、和谐网和安全网。

关键词：网络文化；互联网；违法行为

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In this project, IAI is developing a software tool called CBAR (Channel Model Tool Based on Bidirectional Analytic Ray Tracing and Radiative Transfer) that offers the benefit of high-fidelity channel characterization accounting for terrain and atmospheric effects, resulting in statistical and deterministic channel models that can be incorporated easily into a wireless network performance simulation tool.

关键词：通信；无线通信；天线辐射模式；飞行试验；射线追踪；信道模型

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Occurrence nets (ONs) are acyclic Petri nets recording single system executions. Structured occurrence nets (SONs), composed of multiple ONs together with additional relationships, are intended for portraying the behaviour of complex evolving systems. Such systems generally consist of a large number of sub-systems which may proceed concurrently and interact with each other. In this paper, we describe a tool support for visualisation, verification and simulation of occurrence nets, and of communication structured occurrence nets which are a basic variant of SONs.

关键词：通信；结构发生网；佩特里网；模拟；仿真

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This paper presents the qualitative nature of communication network operations as abstraction of typical thermodynamic parameters . Specifically, statistical mechanics- inspired models of critical phenomena  for heterogeneous packet transmission are developed in terms of multiple intensive parameters, namely, the external packet load on the network system and the packet transmission probabilities of heterogeneous packet types. Network phase diagrams are constructed based on these traffic parameters, and decision and control strategies are formulated for heterogeneous packet transmission in the network system. In this context, decision functions and control objectives are derived in closed forms, and the pertinent results of test and validation on a simulated network system are presented.

关键词：通信；通信网络；统计力学；相变

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This study analyzed the potential of cell phone positioning techniques in freight trucks data collection and long-haul truckshed (geographic extent) tracking. The freight truck identification and tracking algorithms were developed by means of cell phone network data and the established freight truck analysis GIS to recognize the freight trucks and determine their geographic extent (trucksheds). A case study was conducted to illustrate the truckshed tracking process and verify the tracking result from the cell phone network. 

关键词：通信；无线通信；统计数据；货运卡车；驾驶员行为

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Federal agency information systems are increasingly at risk of both intentional and unintentional supply chain compromise due to the growing sophistication of ICT and the growing speed and scale of a complex, distributed global supply chain. Federal departments and agencies currently have neither a consistent nor comprehensive way of understanding the often opaque processes and practices used to create and deliver the hardware and software products and services that it procures. This lack of understanding, visibility, traceability, and control increases the challenges associated with managing the risk of exploitation through a variety of means including counterfeit materials, malicious software, or untrustworthy products. Overall, it makes it increasingly difficult for federal departments and agencies to understand their exposure and manage the associated supply chain risks. Currently, federal departments and agencies and many private sector integrators and suppliers use varied and nonstandard practices, exacerbating the challenge.

关键词：通信；管理实践；信息系统；风险管理；供应链；信息和通信技术

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Maintaining an accurate common operating picture (COP) is a strategic requirement for efficient and successful missions in both disaster response and battlefield scenarios. Past practices include utilizing cellular, radio, and computer based communication methods and updating individual maps. A drawback of these practices has been interoperability of these devices as well as inaccurate reporting and documentation among different entities of the effort. Recent advances in technology have led to the utilization of collaborative maps for maintaining a COP amongst command centers. Despite the advantages this technique offers, it does not address the difficulties surrounding receiving reports from field entities as well as ensuring these entities also have good situational awareness. We are developing SPARCCS (Smartphone Assisted Readiness, Command, and Control System) to address these issues. We use smartphones in conjunction with cloud computing to extend the benefits of collaborative maps to mobile users while simultaneously ensuring that the command centers receive accurate, up-to-date reports from the field.

关键词：通信；指令控制系统；移动计算机处理技术；态势感知；智能手机

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Information sharing and collaboration among federal, state, and local agencies has been repeatedly stressed as a part of the national security strategy. The emphasis has been on interagency communication and has largely left unaddressed the need for internal information system improvements. This thesis will examine how Web 2.0 technology as part of an emergent social software platform (ESSP) can be used to improve intra-agency law enforcement criminal information sharing and collaboration.

关键词：通信；犯罪情报；信息共享；紧急社交软件平台；数字通信；Web2.0

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The capabilities that Mobile Ad Hoc Networking (MANET) technologies can provide to the Marine Corps are just fully coming into view. These new capabilities represent a much more apparent symbiotic relationship between maneuver at the tactical level and the capabilities of a network that supports that maneuver. However, in order to properly leverage these capabilities, a paradigm shift in what networks are and how they are managed must take place. As this new model of meshed, ad-hoc network devices presents a shift in how we employ our networks, the concept of network management must also shift in how we view planning and maintaining networks. This research describes a communication framework and network management system (NMS) that supports the design of network aware systems that enable a robust self-management capability in MANETs.

关键词：通信；指令控制系统；通信和无线电系统；分布式网络

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Computing and information and communications technology (ICT) has dramatically changed how we work and live, has had profound effects on nearly every sector of society, has transformed whole industries, and is a key component of U.S. global leadership. A fundamental driver of advances in computing and ICT has been the fact that the single-processor performance has, until recently, been steadily and dramatically increasing year over years, based on a combination of architectural techniques, semiconductor advances, and software improvements. Users, developers, and innovators were able to depend on those increases, translating that performance into numerous technological innovations and creating successive generations of ever more rich and diverse products, software services, and applications that had profound effects across all sectors of society.

关键词：通信；计算机硬件；计算机软件；通信和无线电系统；信息系统；信息安全

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