检索结果-内蒙古大学图书馆

4th International Conference on Materials, Mechatronics and Automation, ICMMA 2014

作者： Chen, Xu Du, Zhe Yin, Xiang Gen Pan, Wei Xu, Li Qiang State Key Laboratory of Advanced Electromagnetic Engineering And Huazhong University of Science and Technology Wuhan China Electric Power Research Institute of Hunan Power Grid Corporation Hunan China

ISBN: (纸本)9783038351177

Natural disasters like icing have a strong impact on the power transmission line which is the foundation of safety and stability operation for power system. In this paper, an online transmission line monitoring and patrol system based on Wireless Sensor Network (WSN) and Ethernet Passive Network (EPON) is firstly designed and a model is built to analyze the latency influenced by the number of towers using EPON communication technology which is solved by Lingo 11. © (2014) Trans Tech Publications, Switzerland.

关键词： Wireless sensor networks

来源：评论

学校读者我要写书评

暂无评论

AlGaN/GaN THz resonant plasmonic detectors with symmetric and asymmetric patterns deposited above homogeneous and inhomogeneous 2DEG

AlGaN/GaN THz resonant plasmonic detectors with symmetric an...

引用

Global Symposium on Millimeter Waves, GSMM

作者： H. Spisser A.-S. Grimault-Jacquin N. Zerounian A. Aassime L. Cao F. Boone H. Maher Y. Cordier F. Aniel Institut d'Electronique Fondamentale CNRS UMR 8622 Universite Paris Sud Orsay France State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China 3IT.nano Institut Interdisciplinaire d'Innovation Technologique Sherbrooke Canada Centre de Recherche sur I'Hetero-Epitaxie et ses Applications Valbonne France

We investigate plasmonic THz detectors on Al-GaN/GaN hetero-structures for different configurations of the grating (symmetric or asymmetric pattern) and spatial modulation of the electron sheet density. The absorption spectra have been calculated for the different configurations and a few detectors have freshly been fabricated and the transmission and reflection spectra have been measured for one of them. It appears that these detectors could be the ideal candidate for an on-chip, electrically tunable, room-temperature operating and cheap THz detector.

关键词： Gratings MODFETs HEMTs Gallium nitride Detectors Aluminum gallium nitride Wide band gap semiconductors

来源：评论

学校读者我要写书评

暂无评论

Research on comprehensive evaluation index system for distribution network planning alternatives

Research on comprehensive evaluation index system for distri...

引用

3rd International Conference on Energy and Environmental Protection, ICEEP 2014

作者： Lu, Xun Zhou, Yang Zhang, Kai Min Wu, Jia Si Yang, Xue Ying Zhang, Bu Han Jin, Bing Jie Shao, Jian Ge, Teng Yu Guang Dong Power Grid Development Research Institute Co. Ltd Guangdong China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9783038351368

In order to identify weaknesses in distribution network planning alternatives, providing a scientific basis for grid investment decisions, effective and comprehensive evaluation is needed. According to the related principles and objectives, this paper establishes a comprehensive evaluation index system based on hierarchy. This system is guided by the long-term development strategy of China southern power grid, including six strategic layer indices as safety and reliability, economic efficiency, coordination and flexible, smart and green, controllable risk and social benefits. The meaning and classification of every index is listed in details. According to different technical characteristics of every index different fuzzy membership functions are structured. Furthermore, in accordance with the relevant guidelines and specifications, this paper gives specific values of the membership function parameters to achieve standardization of indexes of different dimensions, laying the foundation for a comprehensive assessment. © (2014) Trans Tech Publications, Switzerland.

关键词： Membership functions

来源：评论

学校读者我要写书评

暂无评论

An improved direct power control of PWM rectifier with active power ripple minimization

An improved direct power control of PWM rectifier with activ...

引用

作者： Zhang, Yongchang Qu, Changqi Li, Zhengxi Xu, Wei Power Electronics and Motor Drives Engineering Research Center of Beijing North China University of Technology Beijing China State Key Laboratory of Advanced Electromagnetic Engineering School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781479956982

This paper presents an improved direct power control (DPC) to achieve active power ripple minimization for three-phase PWM rectifiers. Conventional switching-table-based DPC (STDPC) selects only one voltage vector from a heuristic switching table for the whole control period, leading to high power ripples at steady state. Contrary to STDPC, the proposed DPC divides the control period into two intervals: one for the active vector from a switching table and another for a null vector. The principle of active vector selection is discussed in detail based on geometry illustration and mathematical analysis. The duration of the active vector is analytically obtained based on the principle of active power minimization. Simulation and experimental results prove that, compared to conventional STD-PC, the proposed DPC achieves much lower power ripples and less line current harmonics at steady state, even if the sampling frequency is halved. Meanwhile, the merits of decoupled active and reactive power control and fast response of conventional STDPC is maintained. © 2014 IEEE.

关键词： Vectors

来源：评论

学校读者我要写书评

暂无评论

26th Annual Computational Neuroscience Meeting (CNS*2017): Part 3 Antwerp, Belgium. 15-20 July 2017 Abstracts

引用

BMC NEUROSCIENCE 2017年第SUPPL 1期18卷 95-176页

作者： [Anonymous] Department of Neuroscience Yale University New Haven CT 06520 USA Department Physiology & Pharmacology SUNY Downstate Brooklyn NY 11203 USA NYU School of Engineering 6 MetroTech Center Brooklyn NY 11201 USA Departament de Matemàtica Aplicada Universitat Politècnica de Catalunya Barcelona 08028 Spain Institut de Neurobiologie de la Méditerrannée (INMED) INSERM UMR901 Aix-Marseille Univ Marseille France Center of Neural Science New York University New York NY USA Aix-Marseille Univ INSERM INS Inst Neurosci Syst Marseille France Laboratoire de Physique Théorique et Modélisation CNRS UMR 8089 Université de Cergy-Pontoise 95300 Cergy-Pontoise Cedex France Department of Mathematics and Computer Science ENSAT Abdelmalek Essaadi’s University Tangier Morocco Laboratory of Natural Computation Department of Information and Electrical Engineering and Applied Mathematics University of Salerno 84084 Fisciano SA Italy Department of Medicine University of Salerno 84083 Lancusi SA Italy Dipartimento di Fisica Università degli Studi Aldo Moro Bari and INFN Sezione Di Bari Italy Data Analysis Department Ghent University Ghent Belgium Coma Science Group University of Liège Liège Belgium Cruces Hospital and Ikerbasque Research Center Bilbao Spain BIOtech Department of Industrial Engineering University of Trento and IRCS-PAT FBK 38010 Trento Italy Department of Data Analysis Ghent University Ghent 9000 Belgium The Wellcome Trust Centre for Neuroimaging University College London London WC1N 3BG UK Department of Electronic Engineering NED University of Engineering and Technology Karachi Pakistan Blue Brain Project École Polytechnique Fédérale de Lausanne Lausanne Switzerland Departement of Mathematics Swansea University Swansea Wales UK Laboratory for Topology and Neuroscience at the Brain Mind Institute École polytechnique fédérale de Lausanne Lausanne Switzerland Institute of Mathematics University of Aberdeen Aberdeen Scotland UK Department of Integrativ

来源：评论

学校读者我要写书评

暂无评论

Mechanical response joint under of the TiAl/steel brazed torsional load

引用

China Welding 2014年第3期23卷 42-47页

作者：李玉龙赵诚冯吉才何鹏 Key Lab for Robot & Welding Automation of Jiangxi Province Mechanical & Electrical Engineering School Nanchang University Nanchang 330031. State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Harbin 150001.

An attempt to investigate the mechanical response to the torsional load, torsional tests of TiA1/steel brazed joints were conducted at room temperature. The TiAl/steel joints used in the torsional loading tests were brazed under the optimum parameters of 1 173 K and 300 s. Torsional strength, fracture path and the behavior of the reaction phases were studied. The results show that the average torsional strength of the joints with the diameters of 13mm, 16 mm and 20 mm is 136 N · m, 270 N · m and 490 N · m, respectively; which is 81.9% , 85.5% and 86. 2% of the TiAl base metal, respectively. Fracture path and crack propagation process analysis shows, when subjected to the torsional load, Ag-based solid solution is deformed and cracks germinate at the interface of Ag-based solid solutioa/AlCu2 Ti particles or Ag-based solid solution/AlCu2 Ti layers, grow up and propagate into the Al-Cu- Ti brittle reaction layers, then propagate into the TiAl base metal, subsequently result in failure.

关键词： TiAl brazing torsional test fracture path

来源：评论

学校读者我要写书评

暂无评论

Effect of controlling concentration on the properties of SnO2 nanocystalline for dye sensitized solar cells

Effect of controlling concentration on the properties of SnO...

引用

2014 Dianchi advanced Materials Forum

作者： Song, Jie Guang Hua, Lin Shen, Qiang Wang, Fang Zhang, Lian Meng Hubei Key Lab of Advanced Technology of Automotive Components School of Automotive Engineering Wuhan University of Technology Wuhan China State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China Department of Materials Engineering Jiujiang University JiujiangJiangxi China

ISBN: (纸本)9783038353348

The study of dye-sensitized solar cells (DSCs) based on nano-crystalline films of high band gap semiconductors is a progressive field of research that is being carried out by scientists in a wide range of laboratories. To improve the conversion efficiency of the DSCs, the SnO2 nanorots photocurrent, the effect of controlling concentration on the propertiesof SnO2 nano-crystalline were investigated via the hydrothermal method, and characterized by XRD, HRTEM, BET and Absorption spectrum. Though analysis the results, the conclusion is shown the pure SnO2 is preparation, the prepared SnO2 nano-crystalline under 0.05mol/L shows the particle-shape crystalline, the surface area of SnO2 nano-crystalline is 102.1683m2/g. The prepared SnO2 nano-crystalline under 1mol/L the fiber-shape crystalline, the surface area of SnO2nano-crystalline is 79.7591m2 /g. The absorbance of SnO2 nano-crystalline shows the strong absorption in the ultraviolet ray range, the absorbance of synthesized SnO2 nano-crystalline under the concentration of SnCl4solution for 1mol/L shows the higher value. © (2014) Trans Tech Publications, Switzerland.

关键词： Dye-sensitized solar cells

来源：评论

学校读者我要写书评

暂无评论

The forecasting track of Power Grid operation state based on risk assessment

The forecasting track of Power Grid operation state based on...

引用

2nd International Conference on Advances in Energy and Environmental Science, ICAEES 2014

作者： Chen, Qi Rui You, Da Hai Long, Cheng Zou, Yang Hu, Jin Chen, Wei Hua Xu, Peng Pan, Ling Ling State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan 430074 Hubei Province China China Electric Power Research Institute Nanjing 210009 Jiangsu Province China

ISBN: (纸本)9783038352082

As the interconnected power grid becomes increasingly complicated and external environment is changeable, the difficulty of power grid dispatching is increased. Thus, the forecasting track of power grid operation state based on risk assessment can be used to predict the operation trend of power grid state and provide a reference for real-time operation state and guide power grid dispatching. Based on overall power grid risk index system, the operation trend for a period in the future is predicted to diagnose the state of power grid by using fuzzy inference, fuzzy clustering and AHP. In this paper, Ningxia Power Grid is simulated as an example to describe the forecasting track of its operation state in the next 100 minutes. The results present that the track can be used to analyze the causes, which increase or decrease the risk degree of overall power grid, then major leading factors are specifically analyzed. And the track can be also used as guidance for dispatching operators to take measures. Furthermore, the track is proved to be reasonable. © (2014) Trans Tech Publications, Switzerland.

关键词： Analytic hierarchy process

来源：评论

学校读者我要写书评

暂无评论

Teaching by Demonstration on Dual-arm Robot using Variable Stiffness Transferring

Teaching by Demonstration on Dual-arm Robot using Variable S...

引用

IEEE International Conference on Robotics and Biomimetics

作者： Chenguang Yang Peidong Liang Zhijun Li Arash Ajoudani Chun-Yi Su Antonio Bicchi College of Automation Science and Engineering South China University of Technology Guangzhou China State Key Lab of Robotics Systems Harbin Institute of Technology China Department of Advanced Robotics Istituto Italiano di Tecnologia Italy and Interdepartmental Research Center "E. Piaggio" Faculty of Engineering University of Pisa Italy Department of Mechanical and Industrial Engineering Concordia University Canada

ISBN: (纸本)9781467396769

Teaching by demonstration (TbD) techniques have been extensively investigated in the recent decades to enable transferring various task skills from human to robots. The traditional TbD techniques focus on teaching motion trajectories that may be sufficient for routine tasks with fixed objects. While for interactive tasks in contact with dynamic environment and objects, e.g., the payload of a robot manipulator may change from one to another, teaching robot only by motion demonstration may cause undesired contact force and inefficiency in the task execution. In this paper, we present a novel TbD method enhanced by transferring the stiffness profile during human robot interaction (HRI). The method is developed on a bimanual robot, whereas one slave arm plays the role of the tutee, and the other master arm coupled with human demonstrator plays the role of tutor. A rendering algorithm is employed to provide demonstrator with force feedback via a purposely built coupling device according to the motion disparity between the two arms. The muscle surface electromyography (sEMG) signals collected during HRI is processed to extract the demonstrator's variable stiffness as well as hand grasping patterns. Comparative tests have been carried out on a bimanual Baxter robot for a lifting task with three different set-ups: i) TbD with predefined fixed stiffness;ii) TbD with demonstrator transferred variable stiffness without force feedback;and iii) TbD with demonstrator transferred variable stiffness with force feedback. Results show that the proposed TbD method performs best by transferring the demonstrator's physical interactive skill to the robot in a natural and efficient manner.

关键词： TbD proposed efficient

来源：评论

学校读者我要写书评

暂无评论

A novel wound rotor BDFIG for ship shaft generator application —Control and prototype tests

A novel wound rotor BDFIG for ship shaft generator applicati...

引用

International Conference on Electrical Machines and Systems (ICEMS)

作者： Xin Chen Xuefan Wang State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology

ISBN: (纸本)9781479951635

Brushless doubly-fed induction generator (BDFIG) as a stand-alone power generation has a wide application of variable speed constant frequency (VSCF) generator in ship shaft generator systems. In this paper, an excitation control strategy for stand-alone BDFG is introduced, moreover, the characteristics of the ship shaft generator is discussed. Working in the ship, the stability and energy-saving efficiency of the standalone generator should be strongly taken into account, to tackle this problem, the prototype test of the BDFIG is rigorously implemented and the test results is comprehensively analyzed. The experiments included in this paper were carried out on a 60kW wound rotor BDFG.

关键词： Generators Marine vehicles Shafts Rotors Voltage control Stator windings

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：