Jiangmen, China
Jiangmen, China

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He Y.H.,Wu Yi University | Yu S.Y.,Wu Yi University | Zhang L.T.,Wu Yi University
Applied Mechanics and Materials | Year: 2014

New energy vehicle development has been incorporated into China's twelfth five year development plan, motor and controller are core components in the new energy vehicle, high efficiency, light weight, low cost of the motor and the controller are the R & D personnel goal. In recent years, small volume, light weight, large starting torque of plane magnetic field electric machine are suitable for electric cars. This paper introduces the structure principle of plane magnetic field motor and its control, the prototype was done based on three motor drive system by testing each experiment and pass the test of each motor mounted to the vehicle. The motor speed, torque and vehicle speed, mileage and other data obtained in plane magnetic field motor in electric vehicle has great advantages in application of conclusion. © (2014) Trans Tech Publications, Switzerland.


Zeng Q.G.,Wu Yi University | Zhang G.X.,Wu Yi University | Tan J.H.,Wu Yi University | Leung C.W.,Hong Kong Polytechnic University | Zuo J.,Anhui University of Science and Technology
Journal of Raman Spectroscopy | Year: 2011

Shrines (or altars) are constructed in China for worshiping ancestors, Bodhisattva, and God of Wealth. In this work, pigments from the shrine of Kaiping Diaolou tower were analyzed by micro-Raman spectroscopy, in conjunction with other analytical methods including scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDX) and X-ray fluorescence (XRF). Paintings of the shrine were composed of 2-3 pigment layers and the total thickness was determined as about 200-300 μm by optical microscopy and SEM, indicating the fine painting skills applied in the construction of the shrine. The green pigments on the surface layer of the green fragment were identified as a mixture of lead phthalocyanine (PbPc) and cornwallite (Cu 5(AsO4)2(OH)4) by XRF and micro-Raman spectroscopy with two different excitation wavelengths (488 and 785 nm). Underneath the green layer, red and yellow ochre were found. The pigments on the surface layer of red and blue fragments were identified as hematite (Fe2O3) and lazurite or synthetic ultramarine [(Na 8(Al6Si6O24)S3)], respectively. Finally, the pigments under the two surface layers were identified by EDX and micro-Raman spectroscopy as chromium oxide (Cr2O 3), gypsum (CaSO4·2H2O) and calcite (CaCO3). Copyright © 2011 John Wiley & Sons, Ltd.


Zeng Q.G.,Wu Yi University | Ding Z.J.,Anhui University of Science and Technology | Zhang Z.M.,Anhui University of Science and Technology | Sheng Y.Q.,Wu Yi University
Journal of Physical Chemistry C | Year: 2010

Eu(OH)3 rods, with diameters of 140 nm and lengths of 100-500 nm were prepared by a hydrothermal method. X-ray diffraction indicated a pure hexagonal phase (space group P63/m) of the rods. The relations between structural and optical properties of Eu(OH)3 rods under high pressures were obtained by photoluminescence (PL) and Raman spectra. Two structural phase-transition points at around 4 and 8 GPa were observed in this work. When a pressure of about 4 GPa was applied to the samples, one new emission peak at 593 nm was observed in the PL spectra, indicating the splitting of the7F1 Stark level in Eu3+ ions. Such a splitting was attributed to the decrease of site symmetry of Eu3+ ions from C3h to D2 at high pressures. Two new Raman bands appeared under a pressure up to about 8 GPa due to the pressure-induced amorphization. After the pressure was released, the original PL and Raman spectra were recovered. © 2010 American Chemical Society.


Fan H.-L.,Wu Yi University | Liu Z.-P.,Wu Yi University | Chen S.,Wu Yi University
Advanced Materials Research | Year: 2012

Monocrystal nano-sliver lamella were prepared by hydrothermal method with the precursor Ag 2C 2O 4 and the surface active agent polyvinyl alcohol (PVA). The influence of the dosage of PVA on the film thickness and yield of nano-sliver lamella (NSL) were analyzed. And the morphology, the film thickness and electron diffraction pattern of NSL were characterized by scanning electron microscopy (SEM) and transmission electron microscope (TEM) respectively. Furthermore,the same sample was respectively characterized by the parallel optical path and the focus optical path of X-ray diffraction (XRD), and the difference between the diffraction data of these two paths was compared. The results show that the dosage of PVA has significant effect on the thickness and yield of monocrystal nano-sliver lamella. The reason that the great difference between diffraction data of the parallel light path and focusing light path can be mainly owing to the preferential orientation in space of NSL.


He Y.,Wu Yi University | Li F.,Wu Yi University
Proceedings - 2015 IEEE 12th International Conference on Ubiquitous Intelligence and Computing, 2015 IEEE 12th International Conference on Advanced and Trusted Computing, 2015 IEEE 15th International Conference on Scalable Computing and Communications, 2015 IEEE International Conference on Cloud and Big Data Computing, 2015 IEEE International Conference on Internet of People and Associated Symposia/Workshops, UIC-ATC-ScalCom-CBDCom-IoP 2015 | Year: 2015

A method of inter-harmonic detection is presented which based on wavelet transform, After the sampled signal modulated by specific function, the structure of the signal frequency has changed. The methods which based on MALLAT algorithm of wavelet multiresolution have a high frequency resolution in the low-frequency band, Then The inter-harmonics component is calculated by the DC component which is separated out from modulated signal by the methods. The simulation results show that the method can accurately detect harmonics and inter-harmonics. © 2015 IEEE.


He Y.,Wu Yi University | Yu S.,Wu Yi University | Li F.,Wu Yi University
Proceedings - 2015 IEEE 12th International Conference on Ubiquitous Intelligence and Computing, 2015 IEEE 12th International Conference on Advanced and Trusted Computing, 2015 IEEE 15th International Conference on Scalable Computing and Communications, 2015 IEEE International Conference on Cloud and Big Data Computing, 2015 IEEE International Conference on Internet of People and Associated Symposia/Workshops, UIC-ATC-ScalCom-CBDCom-IoP 2015 | Year: 2015

Viewing the problems of lower power factor, high harmonic content, lots of switch losses in tubes of lagging bridge arm when using FB-ZVS-PWM converter in plating power supply, this paper applied the three-level PWM rectifier technology to electroplating power supply, A new converter has been researched. Both different converters have also been compared and analyzed. Phase-shift pulse generator and simulation models have been established in Matlab/Simulink. The results show that the PS-FB-ZVZCS PWM converter is more suitable for plating power supply, phases of current and voltage are synchronous, it has the advantages of higher power factor, low harmonic content. All the switch tubes have achieved soft switch, reducing the switch losses, it can improve the efficiency and its performance effectively. © 2015 IEEE.


He Y.H.,Wu Yi University | Yu S.Y.,Wu Yi University
Applied Mechanics and Materials | Year: 2014

Viewing the problems of lower power factor, high harmonic content, lots of switch losses in tubes of lagging bridge arm when using FB-ZVS-PWM converter in plating power supply, this paper applied the three-level PWM rectifier technology to electroplating power supply, A new converter has been researched. Both different converters have also been compared and analyzed. Phase-shift pulse generator and simulation models have been established in Matlab/Simulink. The results show that the PS-FB-ZVZCS PWM converter is more suitable for plating power supply, phases of current and voltage are synchronous, it has the advantages of higher power factor, low harmonic content. All the switch tubes have achieved soft switch, reducing the switch losses, it can improve the efficiency and its performance effectively. © (2014) Trans Tech Publications, Switzerland.


Zeng J.-Y.,Wu Yi University | Gan J.-Y.,Wu Yi University | Zhai Y.-K.,Wu Yi University
International Conference on Wavelet Analysis and Pattern Recognition | Year: 2012

A novel partially occluded face recognition method based on biomimetic pattern recognition (BPR), proposed by academician Shoujue Wang, is proposed in this paper. A model for partially occluded face recognition based on BPR was introduced. An experiment based on biomimetic pattern recognition adopting a PCA and LDA feature extraction method is performed. Experimental results on Yale image database demonstrate that the use of Biomimetic Pattern Recognition makes it possible to achieve highly accurate and efficient recognition results with the proposed partially occluded face recognition model. © 2012 IEEE.


Yi W.,Wu Yi University | Qingguang Z.,Wu Yi University | Shejun H.,Wu Yi University | Kunbin W.,Wu Yi University | And 2 more authors.
Journal of Rare Earths | Year: 2010

An improved sol-gel method was employed to prepare Eu 3+ ions doped SiO 2-Y 2O 3 nanocomposites. Systematic study was carried out on the effect of post-annealing treatment on photoluminescence (PL) properties of the samples under various europium ions doping concentrations. X-ray diffraction (XRD) patterns indicated that the samples showed an amorphous matrix structure, and the scanning electron microscopy (SEM) pictures showed that the samples presented a nano size (from 21 to 42 nm) granular-stack structure after high-temperature annealing treatment (from 600 to 900 °C, respectively) for 3 h. Raman spectra demonstrated that Y 3+ and Eu 3+ ions were incorporated into the composites through the sol-gel and post-annealing process. Under the excitation of 394 nm ( 7F 0→ 5L 6) light, red emission was observed around 613 nm ( 5D 0→ 7F 2). Without annealing treatment, the optimized doping amount of Eu ions was about 6.5 mol.%, which was much higher than that single doped in SiO 2 glass matrix with Eu ions concentration of 3%, and it raised to 9.0% when the samples were annealed at high-temperature (900 °C) annealing. Copyright © 2012 Elsevier B.V.


Long J.,South China University of Technology | Li Y.,South China University of Technology | Wang H.,Wu Yi University | Yu T.,South China University of Technology | And 2 more authors.
IEEE Transactions on Neural Systems and Rehabilitation Engineering | Year: 2012

Brain-computer interfaces (BCIs) are used to translate brain activity signals into control signals for external devices. Currently, it is difficult for BCI systems to provide the multiple independent control signals necessary for the multi-degree continuous control of a wheelchair. In this paper, we address this challenge by introducing a hybrid BCI that uses the motor imagery-based mu rhythm and the P300 potential to control a brain-actuated simulated or real wheelchair. The objective of the hybrid BCI is to provide a greater number of commands with increased accuracy to the BCI user. Our paradigm allows the user to control the direction (left or right turn) of the simulated or real wheelchair using left-or right-hand imagery. Furthermore, a hybrid manner can be used to control speed. To decelerate, the user imagines foot movement while ignoring the flashing buttons on the graphical user interface (GUI). If the user wishes to accelerate, then he/she pays attention to a specific flashing button without performing any motor imagery. Two experiments were conducted to assess the BCI control; both a simulated wheelchair in a virtual environment and a real wheelchair were tested. Subjects steered both the simulated and real wheelchairs effectively by controlling the direction and speed with our hybrid BCI system. Data analysis validated the use of our hybrid BCI system to control the direction and speed of a wheelchair. © 2011 IEEE.

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