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检索条件"机构=State Key Lab. of Advanced Electromagnetic Engineering & Technology"

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Create Manufacturing Service with GAN

Create Manufacturing Service with GAN

引用

2019 IEEE International Conference on Smart Manufacturing, Industrial and Logistics engineering, SMILE 2019

作者： Chen, Shengkai Fang, Shuiliang Tang, Renzhong Key Lab. of Advanced Manufacturing Technology of Zhejiang Province College of Mechanical Engineering Zhejiang University Hangzhou China State Key Laboratory of Fluid Power Transmission and Control College of Mechanical Engineering Zhejiang University Hangzhou China

ISBN: (纸本)9781538679982

A generative adversarial network based manufacturing service instance generator is proposed in this paper. During the training of the generative adversarial network model, we adopt Word2Vec model to represent manufacturing services in the form of numerical vectors. The accuracy of the generator gets 0.76 after training, and the synthesized data are good enough to extend the current datasets for the further study on manufacturing services. © 2019 IEEE.

关键词： Generative adversarial networks

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Reaction process of Al2(1-x)MgxTi1+xO 5 composite powder by chemical co-precipitation and subsequent sintering

Reaction process of Al2(1-x)MgxTi1+xO 5 composite powder by ...

引用

作者： Shen, Shang-Yue Yang, Rui Shen, Qiang Wang, Chuan-Bin Zhang, Lian-Meng School of Materials Science and Chemical Engineering China University of Geosciences Wuhan 430074 China State Key Lab. of Advanced Technology for Materials Synthesis Processing Wuhan University of Technology Wuhan 430070 China

Al2(1-x)MgxTi1+xO5(x=0.05-0.3) composite powder was prepared by the method of chemical coprecipitation and subsequent sintering using TiCl5, MgCl2 and AlCl 3 solution as the raw materials, and ammonia and ammonium carbonate as the solvent. Thermal dynamics and kinetic dynamics analysis of the precursor during the heat treatment were explored in detail, and the reaction process of Al2(1-x)MgxTi1+xO5(x=0.3) composite powder was confirmed. Results show that, as the temperature increases MgO reacts with TiO2 of anatase phase to form MgTi2O5. At about 650°C, anatase transfers into rutile. Then MgTi2Os reacts with Al2O3 to produce MgAl2O4 at 900°C. When the temperature is above 1100°C, the desired Al 2(1-x)MgxTi1+xO5(x=0.3) composite powder is synthesized by the reaction of MgAl2O24, Al 2O3 and TiO2 of rutile phase.

关键词： Powders

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Effect of annealing on laser-ablated *** 5+xO15+2x thin films

Effect of annealing on laser-ablated *** 5+xO15+2x thin film...

引用

作者： Zhan, Z.S. Gong, Y.S. Wang, C.B. Shen, Q. Zhang, L.M. State Key Lab. of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology Wuhan 430070 China School of Materials Science and Chemical Engineering China University of Geosciences Wuhan 430074 China

In this study, K3Li2-xNb5+xO 15+2x (KLN) thin films were prepared by laser-ablated a sintered ceramic target. For an optimum deposition condition, in-situ post annealing method was employed on as-deposited films. XRD measurements showed that KLN films with (310) preferred orientation were obtained on fused quartz substrate. Surface morphology studies indicated mat in-situ post annealing could improve the surface quality of KLN thin films. The average transmittance of as-deposited and annealed films in the visible range was nearly 80% to 90%.

关键词： Thin films

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The optimal LCMV beamformer under multiple desired signals case

The optimal LCMV beamformer under multiple desired signals c...

引用

IET International Radar Conference 2013

作者： Xu, Zhen-Hai Chen, Ming-Zui Rao, Bin State Key Lab. of Complex Electromagnetic Environ. Effects on Electron./Info. System Changsha 410073 China School of Electronic Science and Engineering National University of Defense Technology Changsha 410073 China

ISBN: (纸本)9781849196031

The optimal multiple linear constraint minimal variance (LCMV) beamformer is presented under multiple desired signals case. The theoretical solutions of the optimal weighted vector and maximum signal-to-interference-plus-noise-ratio (SINR) are derived by using variable substitution method. Simulation results show that the algorithm is superior to the traditional LCMV approach in the SINR, computational load and applicability. The algorithm can be applied in the area of radar tracking of low-angle targets and polarization radar signal processing.

关键词： Signal to noise ratio

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Cooperated control strategy of generator re-dispatching and multi-HVDC modulation after ultra HVDC block

Cooperated control strategy of generator re-dispatching and ...

引用

作者： Wang, Yuling Shao, Dejun Xu, Youping Shen, Xuhui Duan, Chengjin Wang, Yicong Sun, Haishun State Key Lab of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China Central China Branch of State Grid Corporation of China Wuhan China China Electric Power Research Institute Beijing China

With the increase of DC project voltage level and transmission capacity, the security and stability risk caused by DC blocking is gradually increasing. Aiming at reserve dispatch after ultra-high voltage direct current (UHVDC) block, scenarios of DC power modulation participating in dispatching are presented. Mathematical models of generator re-dispatching incorporated control of DC in AC/DC hybrid grid in three situations in terms of enough reserve capacity in the disturbed province, regional reserve capacity sufficient and insufficient to make up for the power deficiency are presented. Then, a decision-aid system for optimal reserve dispatch after UHVDC block is proposed. Simulation results of Central China power grid indicate that the proposed scheduling scheme can reduce the operation risks of security and load loss if necessary. © 2019 Institution of engineering and *** right reserved.

关键词： Modulation

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The mechanism of controlling pore microstructure for YAG porous ceramics 6th

The mechanism of controlling pore microstructure for YAG por...

引用

6th Annual Meeting on Testing and Evaluation of advanced Materials, TEIM 2015

作者： Xu, Minghan Song, Jieguang Du, Daming Wang, Fang Li, Yangliang Ji, Gangchang Chen, Fei Engineering and Technology Research Center for Materials Surface Remanufacturing of Jiangxi Provence Department of Materials Engineering Jiujiang University Jiujiang332005 China State Key Lab. of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

ISBN: (纸本)9783038357278

YAG is an important advanced structural and functional material. The mechanism of controlling pore microstructure of YAG porous ceramics were investigated in this paper. Through the porosity and SEM result analyzing, the conclusions are shown as follows, the porosity and the pore size of YAG porous ceramics are decreased with increasing the sintering temperature, the pores of YAG porous ceramics show a regular and well-distributed structure as lower sintering temperature, the porosity of YAG porous ceramics is increased with increasing the foaming agent content, but the increasing tendency is few after adding content more 15wt%, when the foaming agent content is less than 15wt%, the big pore is more and the pore microstructure is better. So the sintering temperature at 1500°C for 1 hour and the foaming agent content for 15wt% are better controlling conditions for obtaining better porosity and pore microstructure. © 2016 Trans Tech Publications, Switzerland.

关键词： Yttrium aluminum garnet

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Modeling thermal fatigue in anisotropic Sn-Ag-Cu/Cu solder joints

Modeling thermal fatigue in anisotropic Sn-Ag-Cu/Cu solder j...

引用

2009 International Conference on Electronic Packaging technology and High Density Packaging, ICEPT-HDP 2009

作者： Shihua, Yang Yanhong, Tian Chunqing, Wang Tengfei, Huang Department of Electronics Packaging Technology School of Materials and Engineering Nangang Harbin 150001 China State Key Lab. of Advanced Welding Production Technology Harbin Institute of Technology 92 Xidazhi Street Nangang Harbin 150001 China

ISBN: (纸本)9781424446599

Properties of body-centered tetragonal β-Sn are highly anisotropic. The crystal orientation of the β-Sn has a marked effect on the stress state in the SnAgCu solder joints. A finite element analysis has been performed of the thermal cycling of the SnAgCu solder and solder joints. Significant amounts of stresses at the solder/Cu interface and in the plane of the grain boundary was found. The best Sn grain orientation is perpendicular to the solder/Cu interface. ©2009 IEEE.

关键词： Anisotropy

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Tribological behaviors and corrosion resistance of aluminum alloys by nitrogen plasma immersion ion implantation

Tribological behaviors and corrosion resistance of aluminum ...

引用

作者： Jiang, Yehua Liu, Hongxi Zhou, Rong Tang, Baoyin Faculty of Materials Science and Engineering Kunming University of Science and Technology Kunming 650093 China State Key Lab. of Advanced Welding Production Technology Harbin Institute of Technology Harbin 150001 China

Nitrogen ions were implanted into LY12CZ aluminum alloy by plasma immersion ion implantation (PIII) technique. The chemical states, composition distributions, tribological properties, and anti-corrosion behaviors of the N-PIII coupons in 3.5% NaCl saturated solution were investigated. X-ray photoelectron spectroscopy (XPS) analysis indicates that the modified layer is mainly composed of AlN phase and a fraction of Al2O3 compounds. The depth profile of implanted nitrogen ion has two peaks, corresponding to 40 nm and 88 nm from the surface, respectively. The surface hardness is obviously improved by dispersion strengthening from AlN phase, and the maximum value increases by 140%. Friction and wear behaviors of all these samples exhibits that the friction coefficient reduces from 0.47 to 0.38. Compared with the untreated substrate, the anode polarization curves reveal that the corrosion potential (Ecorr) of all implanted samples increase and corrosion current density (Icorr) decrease, the maximum E corr increases by 200 mV and the minimum Icorr decreases by over two orders of magnitude. It also indicates that the wear tracks of modified coupons are much shallower and narrower than that of untreated sample, the minimum wear loss decreases by 43.4%. Tribological property and corrosion resistance of aluminum alloys strongly depended on the composition depth profiles of the modified layers. © 2013 advanced Study Center Co. Ltd.

关键词： Ion implantation

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Design and Analysis of a Novel Miniaturized Ultra-Thin Wide-Band Metamaterial Absorber

Design and Analysis of a Novel Miniaturized Ultra-Thin Wide-...

引用

2023 International Applied Computational electromagnetics Society Symposium, ACES-China 2023

作者： Ma, Jingnan Li, Yan Li, Erping School of Electronics and Information Engineering Hebei University of Technology Tianjin China China Jiliang University Key Lab. of Electromagnetic Wave Information Technology and Metrology of Zhejiang Province China Zhejiang China Zhejiang University Key Laboratory of Advanced Micro-Nano Electronic Device and Smart Systems and Applications Zhejiang China

ISBN: (纸本)9781733509657

The volume of existing metamaterial absorber (MMA) is not small enough to be applied in miniaturized devices such as chip level. To solve this problem, a miniaturized ultrathin wide-band MMA is proposed in this paper. The thickness of proposed MMA is 1.1mm with a absorption rate of 99.6% at 19.7GHz. This paper also analyzes the influence of parameters of the proposed MMA on the absorption performance and proves that it has a certain tunability of the absorption band. By comparing with other works, the MMA proposed in this paper realizes the miniaturization of the structure while ensuring ultra-wideband. This benefit offers a novel approach to address the problem of difficult loading electromagnetic shielding structures in miniaturized chip designs. © 2023 Applied Computational electromagnetics Society (ACES).

关键词： electromagnetic shielding

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Inductance-Emulating Control for DFIG-Based Wind Turbine to Ride-Through Grid Faults

Inductance-Emulating Control for DFIG-Based Wind Turbine to ...

引用

作者： Zhu, Donghai Zou, Xudong Deng, Lu Huang, Qingjun Zhou, Shiying Kang, Yong StateKey Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China Wuhan NARI Limited Liability Company of State Grid Electric Power Research Institute Wuhan430074 China State Key Lab. of Disaster Prev. and Reduction for Pwr. Grid Transmission and Distribution Equipment Changsha410129 China

For doubly fed induction generator (DFIG)-based wind turbines, the rotor side of DFIG is prone to suffering from overcurrent during grid faults, due to large electromotive force (EMF) induced in the rotor circuit. To solve this problem, this paper proposes an inductance-emulating control strategy for DFIG-based wind turbine to suppress the postfault rotor current, thereby enhancing its low-voltage ride through capability. Under the proposed control strategy, once the grid fault is detected, the rotor side converter (RSC) is controlled to emulate an inductance. Furthermore, with proper inductance value, both the required rotor voltage and postfault rotor current can be reduced within the permissible ranges of RSC, thus the controllab.lity of control system can be maintained during transient process. Moreover, the oscillation of electromagnetic torque can be effectively suppressed during transient state of both grid fault and fault recovery. Finally, the simulation and experimental results are presented to demonstrate the effectiveness of the proposed method. © 1986-2012 IEEE.

关键词： Wind turbines

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