The simulation process, milestones and inputs are unknowns to first-time users of the CSSL. The Simulation Planning Guide aids in establishing expectations for both NASA and non-NASA facility customers. The potential audience for this guide includes both internal and commercial spaceflight hardware/software developers. It is intended to assist their engineering personnel in simulation planning and execution. Material covered includes a roadmap of the simulation process, roles and responsibilities of facility and user, major milestones, facility capabilities, and inputs required by the facility. Samples of deliverables, facility interfaces, and inputs necessary to define scope, cost, and schedule are included as an appendix to the guide.

关键词：通信；宇宙通信；模拟；航天器通信；系统分析

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Direct connection and reflective connection are commonly used in traditional Trojan's communication model,which have some significant deficiencies in hiding,anti-tracking,and efficiency.To improve the aspects above in traditional Trojan horse communication model,the author proposed a hybrid communication model based on P2P technology.The model uses P2P intranet penetration protocol to build the channel between the controlled station and the control station,and uses P2P node servers for saving the Trojan's status and transferring some data between the controlled and the control.The topology of networks for controller will be very flexible.Using the IP traceback technology will be difficult to track the controllers.Using UDP protocol in the hybrid communication model for data transmission will hide the network status.Control sites can work in distributed mode.By using the model,the hiding-ability,anti-traceability and communication efficiency will be greatly improved.

关键词：通信；木马；通信模型；P2P；内网穿透

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Communication, i.e., moving data, between levels of a memory hierarchy or between parallel processors on a network, can greatly dominate the cost of computation, so algorithms that minimize communication can run much faster (and use less energy) than algorithms that do not. Motivated by this, attainable communication lower bounds were established for a variety of algorithms including matrix computations. The lower bound approach used initially for Theta(N3) matrix multiplication, and later for many other linear algebra algorithms, depended on a geometric result by Loomis and Whitney: this result bounded the volume of a 3D set (representing multiply-adds done in the inner loop of the algorithm) using the product of the areas of certain 2D projections of this set (representing the matrix entries available locally, i.e., without communication). Using a recent generalization of Loomis' and Whitney's result, we generalize this lower bound approach to a much larger class of algorithms, that may have arbitrary numbers of loops and arrays with arbitrary dimensions as long as the index expressions are a ne combinations of loop variables.

关键词：通信；并行算法；线性代数；通信下界；微分方程

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Communications planning is a key part of the Marine Corps operational planning process. The ability to design and analyze communication network plans efficiently and accurately has a direct impact on the ability of commanders to command and control actions on the battlefield. This thesis proposes a cloud-based application for communications planning. It describes the benefits achievable through automation, collaboration and application interoperability, and provides recommendations for development of such a system. It concludes by presenting an implementation of these recommendations via a proof of concept application.

关键词：通信；通信网络；海军陆战队装备；电脑程序；互操作性

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Many communication networks today follow a distributed architecture, informed by a desire for immunity to attack by WMDs. However, the 'information architecture' of these networks is based on the assumption that information at one location is not replaceable by that somewhere else. In this project we do away with this assumption, embrace the duplicable nature of information, and view communication networks as distributed data bases that must maintain and serve information in spite of attack by WMDs. Our objective is to create algorithms and mechanisms that transmit 'high-value bits at high-speed' in a scalable and attack-resilient manner.

关键词：通信；无线通信；网络结构；分布式优化；大规模杀伤性武器

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In this paper we introduce CARRQR, a communication avoiding rank revealing QR factorization with tournament pivoting. We show that CARRQR reveals the numerical rank of a matrix in an analogous way to QR factorization with column pivoting (QRCP). Although the upper bound of a quantity involved in the characterization of a rank revealing factorization is worse for CARRQR than for QRCP, our numerical experiments on a set of challenging matrices show that this upper bound is very pessimistic, and CARRQR is an effective tool in revealing the rank in practical problems. Our main motivation for introducing CARRQR is that it minimizes data transfer, modulo poly- logarithmic factors, on both sequential and parallel machines, while previous factorizations as QRCP are communication sub-optimal and require asymptotically more communication than CARRQR. Hence CARRQR is expected to have a better performance on current and future computers, where communication is a major bottleneck that highly impacts the performance of an algorithm.

关键词：通信；列主元QR分解；减少通信；矩阵秩

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The goal of this project relates to e ective management of emergencies or disasters that impact large urban structures, such as commercial buildings, arenas or stadiums and their surrounding street networks. The project has resulted in the E ective Emergency Response and Communication(EERC) system; the system consists of a command center that represents the main control center for managing the emergency, a mobile application that runs on multiple mobile devices in the hands of responders in the eld, and an evacuation system that can run simulations of optimal evacuation patterns in the midst of dynamically changing conditions. The system employs a client-server architecture, using a PostgreSQL server and iPhone/iPod devices for the responders and command center to communicate with each other.

关键词：通信；地形编码；无线电系统；应急通信；城市地区

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泛在网将个人通信、娱乐、业务应用等都融合在了一张网内，给用户带来了更丰富的业务体验。而移动化的泛在网将更加强调用户即使在移动的状态下，也能够无缝地获得无所不能、无所不包的服务，而移动性预测技术作为一种主动积极的基于位置的服务，同时面临了更多的挑战。在研究现有移动性预测的基础上，针对未来移动泛在网络的业务模式及需求，分析了在移动泛在网络环境下的移动预测应具备的特点及其研究方向。为了能够充分适用于移动泛在网络，提出了未来的移动性预测技术，需要解决网络异构性、终端协同性以及业务智能性对移动性预测技术带来的挑战。

关键词：泛在网；协同服务；移动性预测

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This research project is focused on developing computational game theoretic techniques to tackle the design and computation of equilibrium power allocation/control schemes for a complex heterogeneous communication system. We have explored the use of noncooperative game theory, MPEC (Mathematical Programs with Equilibrium Constraints) to formulate and study the spectrum management problem. We have also addressed the design and computation complexities of equilibrium power spectrum policies in various game theoretic frameworks and proposed efficient distributed algorithms for dynamic power spectrum design.

关键词：通信；通信和无线电系统；博弈论；算法；均衡；资源管理

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Given the growing reliance of industry and government on online information services such as cloud computing and data centers, efficient fault-tolerance algorithm design is of increasing importance in both industry and academia. In this dissertation, we present some of our efficient fault-tolerant algorithms for distributed systems under both point-to-point and broadcast communication models.

关键词：通信；通信网络；通信和广播系统；拜占庭故障；纠错码

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