Ching Yun University

Jinghong, China

Ching Yun University

Jinghong, China
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Yang T.-J.,Chung Hua University | Chau Y.-F.,Ching Yun University | Yeh H.-H.,Ching Yun University | Jiang Z.-H.,Ching Yun University | And 3 more authors.
Applied Physics A: Materials Science and Processing | Year: 2011

Dispersion properties, birefringence and confinement loss between the circular air-hole photonic crystal fiber (CAHPCF) and rotational elliptical air-hole photonic crystal fiber (REAHPCF) are investigated numerically by means of a plane-wave expansion method and a finite element method. Results show that the performances of REAHPCF on flatter dispersion curve, single mode, high birefringence and low confinement loss is better than that of CAHPCF. © Springer-Verlag 2011.

Cheng H.-Y.,Chung Yuan Christian University | Cheng H.-Y.,Industrial Technology Research Institute of Taiwan | Weng C.-J.,Chung Yuan Christian University | Liou S.-J.,Chung Yuan Christian University | And 3 more authors.
Polymer Composites | Year: 2010

In this article, a series of nanocomposite materials that consisted of emeraldine base (EB) of polyaniline (PANI) and montmorillonite (MMT) clay were prepared by effectively dispersing the inorganic MMT clay platelets into organic PANI matrix via in situ chemically oxidative polymerization. Organic aniline monomers were first intercalated into the interlayer regions of organophilic clay hosts and followed by an one-step oxidative polymerization with ammonium persulfate as oxidant. The as-synthesized PANI-clay nanocomposite (PCN) materials were characterized by Fourier-Transformation infrared spectroscopy and transmission electron microscopy. It should be noted that the EB of PANI in the presence of dispersed intercalated MMT clay platelets was found to display an observable enhancement in polymer crystallinity as compared with that of neat PANI based on series of investigations of wide-angle powder X-ray diffraction patterns and differential scanning calorimetric studies. This remarkable increase of polymer crystallinity might be resulted from the effective heterogeneous nucleation effect of dispersed clay platelets existed in PCN materials. The surface morphology study of PCN materials was further evaluated by polarizing optical microscopy, scanning electron microscopy, and atomic force microscopy. © 2010 Society of Plastics Engineers.

Chen C.-H.,China University of Technology | Peng Y.-F.,Ching Yun University | Kao T.-S.,Hwa Hsia University of Technology
Lecture Notes in Electrical Engineering | Year: 2010

In this paper, an intelligent transportation control system (ITCS) using wavelet neural network (WNN) is developed to increase the safety and efficiency in transportation process. The proposed control system is composed of a neural controller and compensation controller. The neural controller acts as the main tracking controller, which is designed via a WNN to mimic the merits of an ideal total sliding-mode control (TSMC) law. The learning algorithms are derived from the Lyapunov stability theorem, which are utilized to adjust the parameters of WNN on-line for further assuring system stability. Moreover, based on robust control technique, the compensation controller is developed to attenuate the effect of the approximation error, so that the desired attenuation level can be achieved. Finally, it is applied to control a marine transportation system. The simulation results demonstrate that the proposed control system can achieve favorable control performance than other control methods. © 2010 Springer-Verlag Berlin Heidelberg.

Liao Y.-P.,Ching Yun University | Zhou H.-G.,Ching Yun University | Fan G.-R.,Ching Yun University
3CA 2010 - 2010 International Symposium on Computer, Communication, Control and Automation | Year: 2010

In this paper, we present an efficient HW/SW codesign architecture of a Recognition System of Leaves. The architecture includes pre-processing modules for the input video signal from the camera and interfaces for the external video memory and the LCD. The recognition of leaf is implemented by hardware in FPGA. By using the five mega-pixel camera included in the Altera DE2-70 kit for input, image processing can be done by FPGA Cyclone II EP2C70F89C6N with ∼70,000 LEs on Altera DE2-70 kit. The measurement results can verify HW/SW codesign architecture of leaves recognition easily achieves faster processing performance than the pure SW technique. Using hardware acceleration presents a speed up factor of 7 times over a software implementation. © 2010 IEEE.

Mou S.-C.,Ching Yun University
Advanced Science Letters | Year: 2012

In this paper, we demonstrated a lightweight compact motor operating at 70~100 kHz. The motor is simpler than an electric motor in structure and lower power consumption but higher speed than that of conventional peizoelectric motors. Driver for the PMM is impressively simple. A wave generator and amplifier are all that it takes to supply the piezoelectric ceramic with voltage. Finite element model was developed using ANSYS for the purpose of prediction of the resonance frequency of the vibration mode for the motor driving stator. The periodic plate modal deformation is passed on to a driving bolt, which causes it to oscillate with a movement resembling that of a turning vibrator. The rotor attached to the motor presses its tip on to driving bolt to be driven. The motor is continually being modified to enhance the performance and efficiency. It has a lot of merits such as slim shape, easy holding for motor structure and low manufacturing cost. © 2012 American Scientific Publishers. All rights reserved.

Zhang Y.-T.,Zhengzhou University | Li H.-M.,Zhengzhou University | Hwang S.,Ching Yun University | Zhang Y.-B.,Zhengzhou University
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | Year: 2010

Swirl marks and silver streaks are two popular surface defects of microcellular injection molded parts. Both swirl marks and silver streaks relate to flow state of single-phase solution that is made of polymer melt and supercritical fluid (SCF). Swirl marks usually locate Mnear gate and silver streaks appear the filling end. Based on scanning electron microscope (SEM) experimental results of microcellular injection molded polycarbonate(PC) parts, the swirl marks, silver streaks and their morphology were studied in this paper. It is found that swirl marks with less cell deformation compared with silver streaks. According to the cell morphology of silver streak surface and cross-section, silver streak could be divided into silver strip and silver thread two different types. The former is composed of solidification polymer with shear-stress stretching gas cell in Mnarrow ellipse shape. And the later is composed of solidification polymer with broken gas cell. To distinguish silver strip and silver thread, stretching gas cell broken or not is the criterion.

Chau Y.-F.,Ching Yun University | Chen M.W.,National Taipei University | Yeh H.-H.,Ching Yun University | Wu F.-L.,Ching Yun University | And 2 more authors.
Applied Physics A: Materials Science and Processing | Year: 2011

Scattering field interactions and surface plasmon resonance in a coupled silver nanodumbbell (a pair of silver nanosphere connected by a silver nanobar) are simulated by using the three-dimensional finite-element method. The enhancement of scattering cross section which exhibits a blueshifted is associated with the diameter of the silver nanobar and the wavelength of incident light. Interestingly, the generated optical cloud exceeds two times of the nanodumbbell size which can be turned by varying the diameter of the silver nanobar. © Springer-Verlag 2011.

PubMed | Ching Yun University
Type: Journal Article | Journal: Optics express | Year: 2010

Enhanced surface plasmon resonances in a silvershell nanocylindrical pair connected by a different type of nanobar that interacts with incident plane wave of transverse magnetic polarization are simulated by use of the finite element method. Arrays of silver nanoshells connected by silver nanobars are also investigated. The proposed structure exhibits a red-shifted localized surface plasmon that can be tuned over an extended wavelength range by varying the width of the nanobar and the dielectric constant in dielectric holes (DHs). The increase in the scattering cross sections is attributed to the effects of surface plasmon on the nanobar surface and a larger effective size of DH that is filled with a higher refractive medium. The predictive character of these calculations allows one to tailor the shape of the nanoparticle to achieve excitation spectra on demand with a controlled field enhancement.

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