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2014 IEEE Workshop on Advanced Research and Technology in Industry Applications (WARTIA)最新文献

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Design of real-time data analysis system based on Impala 基于Impala的实时数据分析系统设计
Jingmin Li
With the continuous development of Internet technology, from a mass of data real-time, efficient analysis and dig out the valuable information, especially important for enterprises. At present, relatively common practice is built up data analysis system in the Hadoop environment based on Hive. But it is more suitable for the batch processing in large data of clusters, and is not suitable for the real-time processing of large data requirements brought about by the development of the business adjustment. This paper presents a real-time data analysis system based on Impala. It can be used as a good supplement scheme. This paper will explain the thought and method of the construction of the real-time data analysis system based on Impala, from the system selection, system architecture, and practical.
随着互联网技术的不断发展,从海量数据中实时、高效地分析并挖掘出有价值的信息,对企业尤为重要。目前比较普遍的做法是在Hadoop环境下基于Hive构建数据分析系统。但它更适合集群大数据中的批量处理,不适合业务调整发展带来的大数据实时处理需求。提出了一种基于Impala的实时数据分析系统。它可以作为一个很好的补充方案。本文将从系统选型、系统架构、实际应用等方面阐述基于Impala的实时数据分析系统的构建思路和方法。
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引用次数: 8
The P2P communication technology research based on Internet of things 基于物联网的P2P通信技术研究
Xiaoyan Cheng, Guoqing Dang
The Internet of things is a new type of network, based on the traditional telecommunication network and the Internet. All the ordinary physical objects in the Internet of things can be addressing, independent and able to access to the network. Internet data center in the whole Internet system plays a central role, is responsible for the control and management of possessions networking physical nodes, thus to build a stable, robust and efficient data center on the Internet of things system is crucial. Excessive dependence on the existing Internet data center service dispatch server, load imbalance and different network environment node cannot direct communication. In this paper, aiming at the existing problem of the data center, P2P communication technology based on Internet of things were studied, we design a P2P network communication mode based on Internet of things.
物联网是在传统电信网和互联网的基础上发展起来的一种新型网络。物联网中的所有普通物理对象都可以寻址、独立并能够接入网络。互联网数据中心在整个互联网系统中起着中心作用,负责控制和管理所有联网物理节点,因此构建一个稳定、健壮、高效的物联网数据中心系统至关重要。对现有互联网数据中心业务调度服务器的过度依赖、负载不均衡和不同网络环境节点无法直接通信。本文针对数据中心存在的问题,对基于物联网的P2P通信技术进行了研究,设计了一种基于物联网的P2P网络通信模式。
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引用次数: 7
Feasibility analysis on the phase change thermal storage heating system of solar energy 太阳能相变蓄热供暖系统的可行性分析
Li Pan
The paper used solar energy for heating in the region where the solar energy was rich combined with paraffin phase change thermal energy storage technology in winter. The paper mainly discussed the technology feasibility on two schemes, using whole year solar energy after storing energy by paraffin in winter heating period and using some colder daytime solar energy in supplying heat after storing energy by paraffin. By computing, the two schemes were feasible in technology. This system would generate more value on energy saving emission reduction if was used in heating system in winter.
本文结合石蜡相变蓄热技术在冬季利用太阳能在太阳能资源丰富的地区进行供热。本文主要探讨了石蜡储能后在冬季采暖期利用全年太阳能和石蜡储能后利用部分较冷的白天太阳能供热两种方案的技术可行性。通过计算,两种方案在技术上是可行的。如果将该系统用于冬季供暖系统,将产生更大的节能减排价值。
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引用次数: 1
Structural and electronic distortions in hydrogenated single-walled zigzag carbon nanotubes 氢化单壁之字形碳纳米管的结构和电子畸变
L. Pan, Weiguang Chen, Yanan Tang, Zigang Shen
In this paper, we have investigated hydrogenated single-wall zigzag carbon nanotubes from (7,0) to (11,0) by using pseudopotential-based density functional theory. We found that the structure deformation of configuration follows the way preserving high symmetry as possible. One typical process that two dimer chains along the axis direction separate on CNT is presented. The configuration is more stable as the inter-dimer distance increases. Meanwhile, the carbon bond angles decrease differently due to the hydrogen adsorption site or not, but the C-C band length is insensitive to the dimer chains separation process. The electronic distortions are demonstrated that all configurations show metal behavior for zero interval and the gaps undergo increment with the dimer chains separation increment regardless of tubes chirality, which is related to the hybridization resulting in changing the free electron state and the Fermi level. Furthermore, there is a localized electron distribution behavior difference at hydrogenated carbon site or not.
在本文中,我们利用基于赝势的密度泛函理论研究了从(7,0)到(11,0)的氢化单壁之字形碳纳米管。我们发现构型的结构变形遵循尽可能保持高对称性的方式。介绍了在碳纳米管上两个二聚体链沿轴向分离的典型过程。随着二聚体间距的增加,构型更加稳定。同时,碳键角随氢吸附位点的不同而减小,但C-C波段长度对二聚体链分离过程不敏感。电子畸变表明,所有构型在零区间内都表现出金属行为,并且与电子管手性无关,间隙随二聚体链分离量的增加而增加,这与杂化导致的自由电子态和费米能级的改变有关。此外,在氢化碳位点和非氢化碳位点存在局域电子分布行为差异。
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引用次数: 0
Design of an embedded communication controller based on CAN and Ethernet for substation automation system 基于CAN和以太网的变电站自动化系统嵌入式通信控制器的设计
Liu Yan, Cao Ji-nan
An interlink age design project between CAN and Ethernet for substation communication controller is introduced, analyzing on the model of CAN communication protocols and Ethernet communication protocols, a design method of hardware and software is given. The communication between field devices and monitoring network is carried out. A along-distance monitor and control and date transmission system is established for substation.
介绍了变电站通信控制器CAN与以太网互连的设计方案,分析了CAN通信协议和以太网通信协议的模型,给出了硬件和软件的设计方法。实现了现场设备与监控网络之间的通信。建立了变电站远程监控和数据传输系统。
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引用次数: 0
The scheme based on partial channel state information for the physical layer security 该方案基于部分信道状态信息实现物理层安全
Li-jie Zuo, Weijia Lei, Xianzhong Xie
The physical layer security technology is an effective way to reduce information leakage in a wireless communication system. In this paper, we study the physical-layer security of one-way wiretap channel which contains a source-destination pair, an eavesdropper and multiple cooperating relay nodes. What's more, in this channel, there exists direct link between the source and the destination (eavesdropper) and lacks he eavesdropper's channel state information (ECSI). To address its physical-layer security, we proposed a scheme which combines amplify-and-forward (AF)-based relay beamforming and cooperation jamming (CJ) technology. We aim at minimizing the power available for transmitting desired information in relays and optimizing the relay weights under the scenario of limiting the signal to ratio at the destination to a given range, which can be solved by convex optimization techniques. After that, we prove that the optimization results are unique and globally optimum. And the numerical results show that the proposed design can effectively enhance secure transmission rate.
在无线通信系统中,物理层安全技术是减少信息泄漏的有效途径。本文研究了包含一个源-目的对、一个窃听器和多个协同中继节点的单向窃听信道的物理层安全问题。而且,在该信道中,源端和目的端(窃听方)之间存在直接链接,缺乏窃听方的信道状态信息(ECSI)。为了解决其物理层安全性问题,我们提出了一种结合放大前向(AF)中继波束形成和协同干扰(CJ)技术的方案。我们的目标是在目的地信号比限制在给定范围的情况下,使继电器中传输所需信息的可用功率最小,并优化继电器的权重,这可以用凸优化技术来解决。在此基础上,证明了优化结果的唯一性和全局最优性。仿真结果表明,该设计能有效提高安全传输速率。
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引用次数: 1
A study on bilingual teaching model of the Chinese-Foreign Cooperation in Running Schools 中外合作办学的双语教学模式研究
Jiaying Liu, Jiming Li
Under the background of economic globalization, the demand of the excellent bilinguals is growing rapidly in the whole world. The Chinese-Foreign Cooperation in Running Schools (CFCRS) came into being and is moving forward through twists and turns. It is necessary to find a suitable bilingual teaching model. This paper is mainly based on the status of bilingual teaching in the Chinese-Foreign Cooperation in Running Schools. Combining with the comparative analysis of the international typical bilingual teaching model, it put forward some existing problems of bilingual teaching model: legislation lags, the lack of support from parents and the society. Finally, it gives some constructive suggestions: enhancing the support for strategic resources, encouraging parents to establish parents committee to solve the problems and the society should supervise the implementation as well as protect the rights and interests of students and parents and schools.
在经济全球化的背景下,全球对优秀双语人才的需求迅速增长。中外合作办学应运而生,并在曲折中不断向前发展。寻找合适的双语教学模式是十分必要的。本文主要是基于双语教学在中外合作办学中的地位。结合国际典型双语教学模式的比较分析,提出了双语教学模式存在的一些问题:立法滞后、缺乏家长和社会的支持。最后,提出了加强战略资源支持、鼓励家长成立家长委员会解决问题、社会监督落实、维护学生、家长、学校权益等建设性建议。
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引用次数: 1
Review of power network planning research status 电网规划研究现状综述
Lei Xue, Li-bin Wang, Chunhui Li, Qiang Li
Primary mission and basic principle of power network planning is introduced in detail. Mathematical model of power network planning and related constraints are summarized. Several methods based on mathematical optimization, heuristic algorithm, as well as the intelligent optimization algorithms, such as genetic algorithm are illustrated separately, the characteristics and problems of algorithms are analyzed. The defects, which appear while the above heuristic algorithms are applied to nonlinear combination optimization problem, e.g., power network planning, are analyzed. Finally, the problems to be deeply studied are pointed out.
详细介绍了电网规划的主要任务和基本原则。总结了电网规划的数学模型及其约束条件。分别阐述了基于数学优化、启发式算法以及遗传算法等智能优化算法的几种方法,分析了各种算法的特点和存在的问题。分析了上述启发式算法在求解电网规划等非线性组合优化问题时存在的缺陷。最后,指出了有待深入研究的问题。
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引用次数: 2
Structural change and TFP change in Chinese manufacturing 中国制造业结构变化与全要素生产率变化
Liang Yang, Meng Li
This paper firstly examines the impact of structural change on productivity through a decomposition of aggregate manufacturing productivity growth in China over the period 1978-2009. Especially the shift-share analysis is utilized to measure the impact of the allocation of labor and capital on total factor productivity (TFP) growth in manufacturing.
本文首先通过对1978-2009年中国制造业总生产率增长的分解,考察了结构变化对生产率的影响。特别是利用转移份额分析来衡量劳动力和资本配置对制造业全要素生产率(TFP)增长的影响。
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引用次数: 0
Optimal location of terminal voltage nonlinear excitation controller to mitigate small signal stability problem 终端电压非线性励磁控制器的优化定位以解决小信号稳定性问题
Cheng Liu, Kaifeng Zhang, X. Dai, Lu Li, Jinwen Li
This paper aims at the selection of optimal location of the terminal voltage nonlinear excitation controller to mitigate small signal stability problem. The controller consists of inverse compensator and proportional controller. One is designed to cancel nonlinear characteristics of the controlled object, the other is used to formulate the closed loop. Based on the simplified model of the generator with terminal voltage nonlinear excitation controller, the linear model of a multi-machine power system is derived. The objective of the optimization is to maximize the sum of damping ratios as much as possible, and the Particle Swarm Optimization (PSO) algorithm is used to investigate this problem in order to optimize the location and parameter of nonlinear controller. To show the validity of the proposed method, simulation results are presented and discussed for IEEE 9-bus system.
本文旨在研究终端电压非线性励磁控制器的最佳位置选择,以解决小信号稳定性问题。该控制器由逆补偿器和比例控制器组成。一个用于消除被控对象的非线性特性,另一个用于制定闭环。在采用端电压非线性励磁控制器的发电机简化模型的基础上,推导了多机电力系统的线性模型。优化的目标是使阻尼比之和尽可能最大化,并采用粒子群优化算法对该问题进行研究,以优化非线性控制器的位置和参数。为了证明该方法的有效性,给出了ieee9总线系统的仿真结果并进行了讨论。
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2014 IEEE Workshop on Advanced Research and Technology in Industry Applications (WARTIA)
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