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36511.低成本嵌入式计算机实时图像处理
[信息传输、软件和信息技术服务业] [2014-07-18]
In 2012 a federal mandate was imposed that required the FAA to integrate unmanned aerial systems (UAS) into the national airspace (NAS) by 2015 for civilian and commercial use. A significant driver for the increasing popularity of these systems is the rise in open hardware and open software solutions which allow hobbyists to build small UAS at low cost and without specialist equipment. This paper describes our work building, evaluating and improving performance of a vision-based system running on an embedded computer onboard such a small UAS. This system utilises open source software and open hardware to automatically land a multi-rotor UAS with high accuracy. Using parallel computing techniques, our final implementation runs at the maximum possible rate of 30 frames per second. This demonstrates a valid approach for implementing other real-time vision based systems onboard UAS using low power, small and economical embedded computers.
关键词：图像处理;无人机系统;嵌入式计算机
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36512.物联网中用于多媒体馆藏浏览的推荐系统
[信息传输、软件和信息技术服务业] [2014-07-18]
Exploring new applications and services for mobile environments has generated considerable excitement among both industries and academics. In this paper we propose a context-aware recommender system that accommodates user's needs with location-dependent multimedia information available in a mobile environment related to an indoor scenario. Specifically, we propose a recommender system for the planning of browsing activities that are based on objects features, users' behaviours and on the current context the state of which is captured by apposite sensor networks. We present the features of such a system and we discuss the proposed approach.
关键词：传感器网络；物联网；语境感知；推荐系统
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36513.基于物联网的数控监控系统的设计与实现
[信息传输、软件和信息技术服务业] [2014-07-18]
Aiming at the shortcomings of the traditional CNC sensor network such as the difficult cable laying and long-distance communication signal attenuation,this paper designs the CNC monitoring system based on Internet of Things technology.The design reduces the power consumption of wireless sensor nodes and the packet loss rate of the sink node through hardware-software co-design.The Internet of Things protocol presented in this paper achieves the real-time communication between the CNC operating platform and the wireless sensor nodes.The experiment result shows that the CNC monitoring system based on Internet of Things technology can provide the temperature and vibration information for the CNC operating platform in time with the advantages of simple layout and reliable communication.
关键词：物联网；数控监控系统；无线传感器节点；低功耗
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36514.电力系统模型的GPU实现用于电磁暂态实时仿真
[信息传输、软件和信息技术服务业] [2014-07-18]
This paper presents decomposition method of mathematical model of electric power system and implementation its in digital system with GPU.The electric power system model can be used for real-time simulation of electromagnetic transients.The article presents the results of experimental research of calculation time for two different digital systems using both the CPU and GPU.
关键词：电力系统；电磁暂态；实时仿真；并行处理
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36515.空间电力系统智能控制的必要性
[信息传输、软件和信息技术服务业] [2014-07-18]
As manned spacecraft venture farther from Earth, the need for reliable, autonomous control of vehicle subsystems becomes critical. This is particularly true for the electrical power system which is critical to every other system. Autonomy can not be achie
关键词：电力系统；自动控制;控制系统的设计；航天器电源；载人飞船
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36516.二级层次模型和非层次模型最优功耗分析
[信息传输、软件和信息技术服务业] [2014-07-18]
Energy scarcity is one of the most critical problems that occur in wireless sensor networks compared to traditional networks.However,the problem has been partly solved by building the power consumption model of WSN.This paper is based on a simple wireless sensor network model,it gives the optimal location of the CH nodes in a cluster and the best parameter about how to divided the cluster amongst hierarchy networks.As shown last,the proposed scheme can save up to 95％ of power consumption.
关键词：无线传感器网络；能耗；两级层次
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36517.通信建设工程定额体系的现状与发展定位
[信息传输、软件和信息技术服务业] [2014-07-18]
通信建设工程定额是通信行业主管部门对建设项目投资效益进行宏观调控和管理的重要手段，对合理有效控制工程建设投资、规范通信工程计价行为起到了积极的作用。本文阐述了定额的重要性及管理现状，并对定额使用中存在的问题及定额的发展与定位做了详细分析、论述。
关键词：通信建设工程；定额；造价管理
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36518.使用动态批量调整大小的自适应流处理
[信息传输、软件和信息技术服务业] [2014-07-18]
The need for real-time processing of “big data” has led to the development of frameworks for distributed stream processing in clusters. It is important for such frameworks to be robust against variable operating conditions such as server failures, changes in data ingestion rates, and workload characteristics. To provide fault tolerance and efficient stream processing at scale, recent stream processing frameworks have proposed to treat streaming workloads as a series of batch jobs on small batches of streaming data. However, the robustness of such frameworks against variable operating conditions has not been explored.
关键词：大数据；流处理；集群发展分布
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36519.用于网络物理系统的观点，形式主义，语言和工具
[信息传输、软件和信息技术服务业] [2014-07-18]
Cyber-physical systems (CPS) are becoming indispensable in our modern way of life. As an application domain CPS is not new. As an intellectual discipline, however, it is. This paper focuses on CPS modeling, which is an essential activity in CPS design, with multiple challenges. In particular, stakeholders lack a systematic framework and guidelines to help them choose among the many available modeling languages and tools. We propose such a framework in this paper. Our framework consists of three elements: viewpoints, which capture the stakeholders’ interests and concerns; concrete languages and tools, among which the stakeholders must make a selection when defining their CPS design environments; and abstract, mathematical formalisms, which are the “semantic glue” linking the two worlds. As part of the framework, we survey various formalisms, languages, and tools and explain how they are related. We also provide examples of viewpoints and discuss how they are related to formalisms.
关键词：网络物理系统;CPS建模;建模语言与工具
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36520.2014中国LTE产业发展峰会成功举行
[信息传输、软件和信息技术服务业] [2014-07-18]
关键词：2014；中国；LTE产业发展峰会
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