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所属行业:信息传输、软件和信息技术服务业

  • 36401.操作ITS设备化学制氢和储存的原型系统

    [化学原料和化学制品制造业,信息传输、软件和信息技术服务业] [2014-07-20]

    This research project sought to develop a prototype hydrogen-based fuel cell system for ITS devices. The project investigated hydrogen storage capacities of the various candidate chemical hydride analogs; selected the most efficient of the candidates for energy storage based on volume, mass, and cost; developed a prototype system; and estimated the capital and operating cost for such a system. A hydrogen fuel cell combines hydrogen and oxygen to produce electricity, providing a clean, high-efficiency energy source that circumvents the problems associated with conventional batteries. A major drawback that limits its utility, however, is the use of heavy and bulky compressed metal cylinders as the source of hydrogen. The chemical-based hydrogen generation used in this project can provide a compact, atmospheric-pressure storage option for the controlled release of hydrogen. Many ITS-based applications can be envisaged with hydrogen-based fuel cells, such as alternating-traffic signs, directional signals, speed-limit signs, blinkers in series, warning blinkers, and backup power sources at traffic signals during power outages. This system is particularly attractive because many remote traffic signals on northern Minnesota roads lack access to a power grid, requiring the use of batteries that must be changed often, thus incurring maintenance costs.
    关键词:制氢;燃料电池;成本缸筒电动电池;储能
  • 36402.参考网络模型:规划和设计大型智能配电电网的计算工具

    [电力、热力、燃气及水生产和供应业,信息传输、软件和信息技术服务业] [2014-07-18]

    Reference Network Models (RNMs) are large-scale distribution network planning tools. RNMs can be used by policy makers and regulators to estimate efficient distribution costs. This is a very challenging task, particularly being network planning a combinatorial problem, which is especially difficult to solve due to the vast size of the distribution areas, and the use of several voltage levels. This chapter presents the main features of RNMs developed by the authors, including high performance requirements related to the type and size of the problem. The model can be used to plan distribution networks either from scratch or incrementally from existing grids. Different case studies illustrate the applicability of these models to the assessment of the impact of massive deployment of renewable distributed generation, demand response actions, and plug-in electric vehicle penetration on distribution costs. The results obtained provide valuable information to guide strategic policy-making decisions regarding the implementation of renewable energy programs and smart grid initiatives.
    关键词:智能电网;参考网络模型;可再生能源;网络规划
  • 36403.以线段为基础的航空图像配准

    [信息传输、软件和信息技术服务业] [2014-07-18]

    We propose a new segment-based registration system for aerial images of the same scene taken at different times, from different view points, and/or by different sensors. We introduce a quantitative characterization of the registration difficulty for a given pair of images. Targeting high registration difficulty input, we exploit on inear edges in images. In the first step of our registration process, we detect line segments in each image. Next we conduct a merging step on the detected line segments. Finally, using the merged line segments as input, we generate possible hypothesis transformations by choosing three segments in each image. Our collinearity score metric for the transformations balances considerations of angular and perpendicular distances. After scoring each hypothesis transformation, the highest-scoring one is selected. For high registration difficulty image pairs, our algorithm shows significant improvement compared to publicly accessible image registration codes.
    关键词:线段;航空图像;登记制度
  • 36404.功能自动优化数据路径

    [信息传输、软件和信息技术服务业] [2014-07-18]

    Digital hardware frontend specification is defined by two extremes - RTL specification and HLS specification. RTL specification produces highly optimized designs, but requires extremely verbose low level specification on the part of the designer. On the other hand, HLS specification requires much less verbose high level specification from the designer, but does not produce well optimized designs. In this thesis, I present a middle ground that captures the pros of these two extremes - a system in which the designer specifies a basic datapath and uses a tool to automatically apply optimizations to that basic datapath.
    关键词:RTL规范;HLS规范;数据路径;
  • 36405.广义箭头

    [信息传输、软件和信息技术服务业] [2014-07-18]

    Multi-level languages and arrows both facilitate metaprogramming, the act of writing a program which generates a program. The arr function required of all arrows turns arbitrary metalanguage expressions into object language expressions; because of this, arrows may be used for metaprogramming only when the object language is a superset of the metalanguage.
    关键词:箭头;元编程;编曲功能;元语言
  • 36406.《现代电信科技》2014年第05期

    [信息传输、软件和信息技术服务业] [2014-07-18]

    根据评估体系对宽带战略进行评估是宽带战 略的重要组成部分。随着宽带战略的实施,各国都在进行宽带战略的评估,我国2013年8月正式发布宽带中国战略,提出了至2020年的宽带发展目标,我们需要建立与国际接轨的评价指标体系,对我国宽带战略的进展与阶段性成果进行评估,指导今后的发展。
    关键词:宽带战略;速率;评估
  • 36407.基于无线传感器网络测距彩涂线的移动节点定位算法研究

    [信息传输、软件和信息技术服务业] [2014-07-18]

    Node localization is one of the key technologies in wireless sensor network.This paper proposed an improved RBDMCL algorithm based on traditional MCL algorithm,which can reduce the sampling areas and improve the positioning accuracy by building a node motion model.Then concludes by simulation analysis and comparison that RBDMCL has higher positioning accuracy than MCL in the anchor node density and node velocity.
    关键词:传感器网络;定位;移动节点;恢复期
  • 36408.支付宝给力海外购物退税

    [信息传输、软件和信息技术服务业] [2014-07-18]

    关键词:支付宝;海外购物;退税
  • 36409.分布式多传感器信息融合技术在水下车辆的应用

    [信息传输、软件和信息技术服务业] [2014-07-18]

    The application of distributed multi-sensor information fusion technology in accurate positioning of Underwater Vehicle was introduced in this paper.According to the system structure of Distributed multi-sensor in an AUV "T1",this article establishes the Kalman filtering mathematical model,accomplishes the fusion algorithm based on Kalman filtering and a numerical simulation.The experimental result shows that the application of fusion algorithm based on Kalman filtering can avoid the limitations of a single sensor,reduce its uncertainty impact and increase the confidence level of data.
    关键词:多传感器信息融合;卡尔曼滤波器;状态估计;AUV;精确定位
  • 36410.虚拟运营商的后运营时代促销激烈主打免费牌

    [信息传输、软件和信息技术服务业] [2014-07-18]

    关键词:虚拟运营商;后运营时代;促销;免费牌
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