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key technique research on desktop virtualization in cloud environment

International Journal of Modeling, Simulation, and Scientific Computing 2017年第2期8卷 232-240页

作者： Zhuohui Shen Liqin Guo Baocun Hou Hongyan Quan ShuangShuang Zhou College of Computer Science and Software Engineering East China Normal University P.R.China State Key Laboratory of Intelligent Manufacturing System Technology Beijing Institute of Electronic System Engineering P.R.China Beijing Aerospace Smart Manufacturing Technology Development Co.Ltd P.R.China

Desktop Virtualization is an essential problem in cloud manufacturing to make full use of shared resources so as to meet the practical application *** this paper,an efficient virtualization solution for desktop transferring is presented for sharing *** strategy is not limited to transfer desktops between virtual machines(VMs),transmission between virtual and physical machines is also achieved.A three-layer systemic structure based on web environment is proposed in the *** employ the application program library Libvirt and kernel-based virtual machine(KVM)technique to manage VMs with dynamic customization scheme,which gains better virtualization per***,we present two different schemes for desktop graphics *** is based on the transport protocol virtual network computing(VNC),and the other adopts the simple protocol for independent computing environment(SPICE),which both achieve more satisfactory *** validity of our scheme is demonstrated on some experimental results and systemic qualitative evaluation is also provided.

关键词： Virtualization KVM VNC VM SPICE.

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A New Power Flow Algorithm for Hybrid AC/DC Power Grid

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Journal of Physics: Conference Series 2019年第3期1213卷

作者： Jiawei Li Xueshan Han Wenbo Li Zhe Jiang Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education (Shandong University) Jinan China. State Grid Shandong Electric Power Research Inxititute Jinan 250003 Shandong Province China.

Aiming at the problem of grid power flow calculation with VSC (Voltage Source Converter) unit in the context of the energy internet, this paper presents a new converter equivalent model. This study introduces a novel unified power flow algorithm for hybrid AC/DC power grids. The method simplifies the converter model by means of equivalent substitution and power conversion. The model better inherits the advantages of traditional AC power flow calculation. Finally, a unified iterative method is used to calculate an IEEE-57 node.

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A hybrid DSSE scheme with different kinds of measurements

A hybrid DSSE scheme with different kinds of measurements

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2017 IEEE Conference on Energy Internet and Energy system Integration, EI2 2017

作者： Li, Yuzhi Jin, Fei Wu, Jinyu Liu, Xiaoliang Liu, Qian Ding, Lei Wang, Xiaohui Weifang Power Supply Company State Grid Shandong Electrical Power Company Weifang China Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Shandong University Jinan China

ISBN: (纸本)9781538614273

With the development of EI (Energy Internet), the high quality real-time state information will be more important for energy system. This paper proposes a comprehensive distribution system state estimation scheme. This scheme is promising in combining different kinds of measurements together to give real time state aware information with high resolution and a certain precision. In order to complete the requirement of this scheme, both dynamic state estimation method and WLS (Weighted Least Square) based static state estimation method are involved to deal with different measurements. The weight information is also handled subtly. Simulation with IEEE 69-bus system is conducted to show the effectiveness of the proposed scheme. Hopefully by adopting this scheme, the observability can be effectively improved and the period of state estimation can be greatly reduced. © 2017 IEEE.

关键词： Internet of Energy

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Design and implementation of integrated control instrument for micro synchronous generation unit

Design and implementation of integrated control instrument f...

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2017 IEEE Conference on Energy Internet and Energy system Integration, EI2 2017

作者： Li, Hao Zhang, Hengxu Xu, Qun Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Shandong University Jinan250061 China Qingdao Power Supply Company State Grid Shandong Electric Power Company China

ISBN: (纸本)9781538614273

Micro synchronous generation unit is a laboratory scale equipment to model the realistic behavior of a real generator set, control of which determines the operating state of the simulation system directly. This paper presents an integrated control instrument for micro synchronous generator (ICIMSG). ICIMSG integrates signal processing unit and power amplifying unit, realizing control functions such as generator starting and braking, automatic frequency regulation, automatic generator-voltage control (AVR) and automatic quasi-synchronizing paralleling. Light synchronized phasor measurement unit (PMU Light) is employed to monitor the generator set. Real-time operation information including frequency, voltage phasor and current phasor can be sent from PMU Light to ICIMSG through the internet. Appropriate software was developed on server to communicate with ICIMSG in a two-way manner through WiFi network. ICIMSG's real-time control and analysis capabilities provide a platform not only for innovative research ideas, but also for teaching general power system engineering concepts to students via physical experiments. All functions of ICIMSG proposed were tested on physical micro synchronous generator sets. © 2017 IEEE.

关键词： Synchronous generators

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Improving Auction Mechanisms for Online Real-Time Bidding Advertising with a Two-stage Resale Model

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IFAC-PapersOnLine 2017年第1期50卷 13575-13580页

作者： Qin, Rui Yuan, Yong Wang, Fei-Yue The State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing China Qingdao Academy of Intelligent Industries Qingdao China Research Center of Military Computational Experiments and Parallel System National University of Defense Technology Changsha China Beijing Engineering Research Center of Intelligent Systems and Technology Institute of Automation Chinese Academy of Sciences Beijing China

Real Time Bidding (RTB), widely publicized as one of the most promising big-data-driven business models for online computational advertising, has the potential of effectively monetizing user clicks and impressions via two-stage auctions with resale. Demand side platforms (DSPs) play a key role as intermediators in this auction process. Typically, the first-stage auctions will be conducted separately in each DSP to determine one winning advertiser registered on it, and in the second-stage auction, each DSP submits a bid based on its winning advertiser's bid to the ad exchange platform (AdX). The highest-bid DSP wins the ad impression from AdX and resells it to its winning advertiser in pursuit of the intermediate fee. This two-stage resale auction is a critical component in maintaining the effectiveness and efficiency of RTB ecosystems. In this paper, we strive to identify and design potential improvements for this auction mechanism with the aim of enhancing the total revenue of both advertisers and DSPs. We also validated our proposed auction mechanisms using the computational experiment approach. The experimental results indicate that our proposed mechanisms can make both advertisers and DSPs better off. Our work represents the first step towards a new research area of optimal mechanism design for RTB auctions, and is expected to provide useful managerial insights in RTB market practice. © 2017

关键词： Sales Commerce Machine design Auction mechanisms Computational advertisings Computational experiment Critical component Demand side Effectiveness and efficiencies Optimal mechanism designs Real time

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Effect of the surface microstructure ablated by femtosecond laser on the bonding strength of EBCs for SiC/SiC composites

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Optics Communications 2018年 424卷 137-144页

作者： Zhaoyang Zhai Wenjun Wang Xuesong Mei Ming Li Jianlei Cui Fangcheng Wang Aifei Pan State Key Laboratory for Manufacturing System Engineering Xi’an Jiaotong University 99 Yanxiang Road Xi’an Shaanxi 710054 China Shaanxi Key Laboratory of Intelligent Robots Xi’an Jiaotong University 28 West Xianning Road Xi’an Shaanxi 710049 China School of Mechanical Engineering Xi’an Jiaotong University 28 West Xianning Road Xi’an Shaanxi 710049 China Xi’an Institute of Optics and Precision Mechanics 17 Xinxi Road Xi’an Shaanxi 710119 China

The bonding strength between environmental barrier coatings (EBCs) and silicon carbide fiber reinforced silicon carbide (SiC/SiC) was improved by preparing microstructure on SiC/SiC surface with femtosecond laser. The processing morphologies with different parameters were compared. There was oxidation phenomenon at the edge of laser processing, and the degree of graphitization was increased. Without damage the internal fiber structure of SiC/SiC, reasonable processing parameters were selected, and microgroove structure was processed on the SiC/SiC surface using the femtosecond laser. The tension test results showed that, after the femtosecond laser machining , the bonding strength between EBCs and SiC/SiC could be improved by about 5.5%, and the time spent to reach the critical load was extended by 11.2%. The EBCs regularly adheres to the microgrooves formed by the femtosecond laser processing, while EBCs in the area without the laser processing was completely detached.

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Token economics in energy systems: Concept, functionality and applications

arXiv

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arXiv 2018年

作者： Zhang, Jun Wang, Fei-Yue Chen, Si-Yuan School of Electrical Engineering Wuhan University Wuhan430072 China State Key Laboratory of Management and Control for Complex System Institute of Automation Chinese Academy of Sciences Beijing100190 China Parallel Economic Research Institute Profile of Qingdao Academy of Intelligent Industries Qingdao266071

Traditional centralized energy systems have the disadvantages of difficult management and insufficient incentives. Blockchain is an emerging technology, which can be utilized in energy systems to enhance their management and control. Integrating token economy and blockchain technology, token economic systems in energy possess the characteristics of strong incentives and low cost, facilitating integrating renewable energy and demand side management, and providing guarantees for improving energy efficiency and reducing emission. This article describes the concept and functionality of token economics, and then analyzes the feasibility of applying token economics in the energy systems, and finally discuss the applications of token economics with an example in integrated energy systems. Copyright © 2018, The Authors. All rights reserved.

关键词： Emission control

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Short-term wind power probabilistic forecasting considering spatial correlation

Short-term wind power probabilistic forecasting considering ...

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2017 IEEE Conference on Energy Internet and Energy system Integration, EI2 2017

作者： Wang, Junxiong Han, Xueshan Jiang, Jiayin Li, Wenbo Ma, Yanfei Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China State Grid Shandong Electric Power Rresearch Institute Jinan China State Grid Jinan Power Supply Company Jinan China

ISBN: (纸本)9781538614273

Wind power probabilistic forecasting is of great significance to the operation and dispatch of the power system. However, most researches have focused on how to predict wind power using local information rather than spatial correlation information of multiple wind farms in a region. In this paper a short-term wind power probabilistic forecasting approach considering spatial correlation is proposed. Originally, a set of explanatory variables highly correlated with the target variable is selected by calculating mutual information. Next, the principal component analysis can help to reconstruct the data and reduce the dimension of the explanatory variables. Finally, the conditional kernel density estimation is introduced to predict the short-term wind power of the target wind farm. Case studies on the dataset of Global Energy Forecasting Competition 2014 verify that the proposed approach can achieve better performance than traditional approach. © 2017 IEEE.

关键词： Principal component analysis

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Fault location in active distribution network based on the change of current phase

Fault location in active distribution network based on the c...

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2017 IEEE Conference on Energy Internet and Energy system Integration, EI2 2017

作者： Zhang, Chen Liu, Zhong Huang, Jun Wang, Bo Wang, Xiangnv State Grid Yangzhou Power Supply Company Weiyang Road 179 Yangzhou China Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Shandong University 17923 Jinshi Road Jinan China

ISBN: (纸本)9781538614273

The growing penetration of the distributed generation (DG) makes the traditional passive distribution network change to active distribution network. A new fault location method is proposed in this paper based on the change of the current phase, which can be used in active distribution network. Specifically, a fault model of the invert DG is proposed, then the active distribution network model is established. The current phase difference between the two ends of the distribution line are calculated for both the normal operation and fault conditions. The relationship between the current phase and the location of the fault is summarized. A fault location criterion is proposed based on the change of the current phase difference. The correctness and effectiveness of the proposed method is verified using the practically measured data and the fault simulation. © 2017 IEEE.

关键词： Location

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Real-time synchronous data visualization for wide area power systems

Real-time synchronous data visualization for wide area power...

引用

2017 IEEE Conference on Energy Internet and Energy system Integration, EI2 2017

作者： Li, Yi Zhang, Hengxu Zhou, Gang Liu, Gang Feng, Zhongkui Meng, Qinggang Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan250061 China Zibo Power Supply Company State Grid Shandong Electric Power Company Zibo370303 China

ISBN: (纸本)9781538614273

With the construction of global energy interconnection, plenty of fluctuating renewable energy access the distribution network, power system dynamic behavior is more complex. The wide-area measurement system light (WAMS Light) records the actual variation of the grid in the distribution network with high accuracy. Exploring the value of high-density, large-scale synchronous data and comprehensive visualization can efficiently reflect the behavior of the system. An open and interactive WAMS Light data visualization platform (WAMSLVP) is built with three-tier structure. WAMSLVP is designed by analysing the function requirements in multi-information fusion, multi-angle analysis, multi-layer integration, program flexible access based on the characteristics of distribution network. And WAMSLVP integrates the frequency, voltage magnitude, angle phase and other power information with the non-power information as multiple layers to compositive display based on geographic information system (GIS), facilitating the dispatchers simultaneously capture multiple information from different analysis just by a glance. © 2017 IEEE.

关键词： Condition monitoring

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