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

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A facile synthesis of versatile Cu2-xS nanoprobe for enhanced MRI and infrared thermal/photoacoustic multimodal imaging

A facile synthesis of versatile Cu2-xS nanoprobe for enhance...

引用

The 6th International Conference on Nanoscience & technology, China 2015

作者： Juan Mou Chengbo Liu Pei Li Yu Chen Huixiong Xu Chenyang Wei Liang Song Jianlin Shi Hangrong Chen State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of Sciences Research Lab for Biomedical Optics and Molecular Imaging Shenzhen Key Lab for Molecular ImagingInstitute of Biomedical and Health EngineeringShenzhen Institutes of Advanced TechnologyChinese Academy of Sciences Tenth People's Hospital of Tongji University

A novel type of intelligent nanoprobe by using single component of Cu2-xS for multimodal imaging has been facilely and rapidly synthesized in scalevia thermal decomposition followed by biomimetic phospholipid modification, which endows them with uniform and small nanoparticle size（ca.15 nm）, well phosphate buffer saline（PBS） dispersity, high stability, and excellent biocompatibility. The assynthesized Cu2-xS nanoprobes（Cu2-xS NPs） are capable of providing contrast enhancement for T1-weighted magnetic resonance imaging（MRI）, as demonstrated by the bothin vitro andin vivo imaging investigations for thefirst time. In addition, due to their strong near infrared（NIR） optical absorption, they can also serve as a candidate contrast agent for enhanced infrared thermal/photoacoustic imaging, to meet the shortfalls of MRI. Hence,complementary and potentially more comprehensive information can be acquired for the early detection and accurate diagnosis of cancer. Furthermore, negligible systematic side effects to the blood and tissue were observed in a relatively long period of 3 months. The distinctive multimodal imaging capability with excellent hemo/histocompatibility of the Cu2-xS NPs could open up a new molecular imaging possibility for detecting and diagnosing cancer or other diseases in the future.

关键词： Cu2-xS nanoprobe Magnetic resonance imaging Infrared thermal imaging Photoacoustic imaging Contrast agent

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Skew effect on demagnetization of permanent magnet synchronous machines with three-phase short-circuit fault

Skew effect on demagnetization of permanent magnet synchrono...

引用

International Conference on Electrical Machines and Systems (ICEMS)

作者： Chen Yu Ronghai Qu Wei Xu Jian Li State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology

This paper makes comprehensive investigation on the skew effect on the demagnetization of permanent magnet synchronous machines (PMSMs). During the processing of the short-circuit fault, each segment of the permanent magnets (PMs) due to the skewed-angle has a different demagnetizing situation in the axial direction. This paper uses 3-dimensional (3D) finite element analysis (FEA) model to verify relevant theoretical study.

关键词： Demagnetization Circuit faults Magnetic flux Analytical models Rotors Magnetic circuits Permanent magnet machines

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Research on Anti-Welding Ability in Air and Vacuum of Nano-AgSnO2 Contacts

Research on Anti-Welding Ability in Air and Vacuum of Nano-A...

引用

The 5th International Conference on Reliability of Electrical Products and Electrical Contacts

作者： Qian Wang Jinyou Liu Xiaocheng Yang Laijun Zhao Xiwen Huang Zhenbiao Li Bingbing Cai Danjiang Wang State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology

To study the anti-welding ability of Nano-AgSnOcontacts,electrical endurance tests are conducted with nanocrystal AgSnO（Nano-AgSnO） contacts in air and in vacuum under the condition of 28V/10 *** experimental results show the anti-welding ability of Nano-AgSnOcontacts in air is better than that in *** order to clarify the causes leading to this phenomenon,analyses of changes of the surface composition as well as surface appearance have been performed with Field Emission Scanning Electron Microscopy（FESEM）.The results indicate that element O decreases largely over the welding area of the contact in vacuum,compared with that of the contact surface in *** a result,AgSn comes into being on the surface of the contacts,whose anti-welding ability is worse than *** may be the main reason leading to that the anti-welding ability of Nano-AgSnO contacts in vacuum is worse than that in air.

关键词： Nano-material AgSnO2 Anti-welding ability

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Optimization of 220kV CVT with Series Saturated Reactor Damper

Optimization of 220kV CVT with Series Saturated Reactor Damp...

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The 5th International Conference on Reliability of Electrical Products and Electrical Contacts

作者： Chun Liu Zhiming Cui Danjiang Wang Bingbing Cai Zhenbiao Li State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology

Based on 220 kV capacitive voltage transformer(CVT) equivalent circuit,a model of ferromagnetic resonance damping of CVT with series saturation reactor damper is built,with which a damp condition is derived *** with the data of 220 kV CVT obtained from Jiangsu Wuxi Nissin co.,LTD,the value,of damp resistance is *** results are consistent with the experimental,which is shown that the proposed theory is validated and it can be use to design CVT with no Ferroresonance under certain condition.

关键词： Capacitive Voltage Transformers Ferroresonance Saturated Reactor Damper Optimization

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Simulation on Phase Angle Difference between Voltage of Metering Port and Bus of 220kV CVT

Simulation on Phase Angle Difference between Voltage of Mete...

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The 5th International Conference on Reliability of Electrical Products and Electrical Contacts

作者： Bingbing Cai Chun Liu Danjiang Wang Zhiming Cui Qian Wang Zhenbiao Li State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology

In order to study how parameters of CVT affect the phase angle difference between Voltage of Metering Port and Bus Voltage,an EMTP model with actual parameters of a220 kV CVT was established to simulate how some parameters affect the phase angle difference,such as value of voltagedividing capacitors and its dielectric loss,ratio of transformer,coil turns of compensation reactor and the *** result is shown as followed:(1) The increasing dielectric loss of high voltage capacitor will make phase angle difference decrease significantly,while the increasing dielectric loss of medium voltage capacitor will make phase angle difference increase significantly;(2) Decrease of the ratio of transformer will make phase angle difference increase a little;(3) Increase of capacity and power factor of load will make phase angle difference *** results are available to CVT testing online.

关键词： capacitor voltage transformer(CVT) phase angle difference parameters

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Low Carbon Economic Dispatching for Power System Integrated with Large Scale Photovoltaic Power Generation

Low Carbon Economic Dispatching for Power System Integrated ...

引用

2014 International Conference on Electrical and Electronic engineering(EEE 2014)

作者： Bin HU Su-hua LOU Yao-wu WU State Key Laboratory of Advanced Electromagnetic Engineering and Technology (Huazhong University of Science and Technology)

Developing low carbon electricity is the key measure to cope with the challenge of global warming and to promote the sustainable development of the economy and *** a clean energy that has developed rapidly in recent years,photovoltaic power generation has promoted the development of low carbon *** this paper,a dispatching objective considering carbon emission based on carbon trading mechanism is established,so that the carbon emission has become schedulable resource owned economic *** the photovoltaic power generation has the characteristics of randomness and volatility,the compensation cost of spinning reserve is introduced to the economic dispatching objective to cope with the impact caused by the photovoltaic power forecast *** this basis,a new model of low carbon economic dispatching for power system integrated with large scale photovoltaic power generation is *** model has been able to make the system operate economically and will effectively reduce carbon *** results demonstrate the reasonableness and validity of the proposed model.

关键词： Low carbon electricity PV power generation Low carbon economic dispatching

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Investigation of Anti-welding Performance of Nanocrystalline CuCr25 Contacts in Vacuum

Investigation of Anti-welding Performance of Nanocrystalline...

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The 5th International Conference on Reliability of Electrical Products and Electrical Contacts

作者： Jinyou Liu Qian Wang Laijun Zhao Xiaocheng Yang Zhenbiao Li Danjiang Wang Bingbing Cai State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology

To investigate the anti-welding performance of Nanocrystalline CuCr25,Microcrystalline CuCr25 material was set as comparison group,electrical endurance tests were conducted in the vacuum analog device under the condition of42V/10 A *** the contact surface degradation is analyzed by using *** result indicates that Nano-contacts have better anti-welding performance than *** Variation tendency of break arc duration is summarized,and the mechanism of that Nano-contacts have better anti-welding performance is discussed from different aspects,including surface morphology and the elements analysis of the fusion zones.

关键词： anti-welding performance Nanocrystalline materials CuCr2S surface degradation

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Research on anti-welding ability in air and vacuum of nano-AgSnO2 contacts 5

Research on anti-welding ability in air and vacuum of nano-A...

引用

5th International Conference on Reliability of Electrical Products and Electrical Contacts, ICREPEC 2014

作者： Wang, Qian Liu, Jinyou Yang, Xiaocheng Zhao, Laijun Huang, Xiwen Li, Zhenbiao Cai, Bingbing Wang, Danjiang State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan430074 China Guilin Electrical Equipment Scientific Research Institute Co. Ltd. Guilin541000 China

ISBN: (纸本)9789881532329

To study the anti-welding ability of Nano-AgSnO2 contacts, electrical endurance tests are conducted with nanocrystal AgSnO2 (Nano-AgSnO2) contacts in air and in vacuum under the condition of 28V/10A. The experimental results show the anti-welding ability of Nano-AgSnO2 contacts in air is better than that in vacuum. In order to clarify the causes leading to this phenomenon, analyses of changes of the surface composition as well as surface appearance have been performed with Field Emission Scanning Electron Microscopy (FESEM). The results indicate that element O decreases largely over the welding area of the contact in vacuum, compared with that of the contact surface in air. As a result, AgSn comes into being on the surface of the contacts, whose anti-welding ability is worse than AgSnO2. This may be the main reason leading to that the anti-welding ability of Nano-AgSnO2 contacts in vacuum is worse than that in air.

关键词： Scanning electron microscopy

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Vibration analysis of motor stator

Vibration analysis of motor stator

引用

2014 2nd International Conference on Manufacturing engineering and technology for Manufacturing Growth, METMG 2014

作者： Yan, Rong Ge Feng, Xu Zhu, Li Hua Yang, Qing Xin Province-Ministry Joint Key Lab. of Electromagnetic Field and Electrical Apparatus Reliability Hebei University of Technology Tianjin 300130 China Tianjin Key Laboratory of Advanced Technology of Electrical Engineering and Energy Tianjin Polytechnic University Tianjin 300387 China

ISBN: (纸本)9783038350354

Motor vibration is one of the main causes of the motor noise, and the vibration of the motor also brings great harm for the safe and reliable operation of the motor load system. The vibration and noise level is one of the essential elements in evaluating the electrical machine's quality. Accurate calculation of the stator natural frequencies and harmonic response of an electrical machine is essential to the prediction of the vibration. This paper takes the common Y series induction motors as the sample. The motor is a complex electromechanical coupling system, which includes stator and rotor. The finite element analysis is used to study on the stator modal shapes and natural frequencies of the induction motor. Then this paper calculates the electromagnetic force by using the finite element method, and gets the spectrum distribution of the radial electromagnetic force. Thus it provides a good method for the motor design by predicting natural frequency and optimizing the motor parameters to avoid resonance. All of them provide theory fundamental basis and technical support for reducing vibration and noise of the motor. © (2014) Trans Tech Publications, Switzerland.

关键词： Stators

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Optimization and performance analysis of E-core and C-core flux-switching permanent-magnet machines for electric vehicle applications

Optimization and performance analysis of E-core and C-core f...

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International Conference on Electrical Machines and Systems (ICEMS)

作者： Yitong Li Wei Xu State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology

Flux-switching permanent-magnet (FSPM) machine demonstrates advantages of high power density, easy heat dissipation ability, strong flux-weakening capability and mechanical robustness due to its unique configuration and working principle, which shows its great attraction for electric vehicle (EV) applications. In this paper, design and optimization of novel E- and C-core FSPM machines for EVs, which can provide higher torque density than conventional FSPM machines and meanwhile reduce magnet usage obviously, are developed firstly. Comparison of the key performance, such as torque capability and magnet usage, is also made among these two new-type and conventional FSPM machines by finite element algorithm (FEA). Besides, comprehensive simulations are provided to verify relevant theoretical investigations.

关键词： Rotors Torque Stator windings Stator cores Topology Magnetic cores

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