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Sung C.-K.,Republic of China Military Academy | Lu C.-H.,Cheng Shiu University

This study integrates panoramic imaging and stereo vision theory to propose an innovative 3D optical positioning method for single-camera panoramic stereo imaging systems. The conventional single-viewpoint theory based on pinhole modeling is replaced by a skew ray tracing methodology to establish the geometrical relationships of object and image. An analytical model of a single-CCD panoramic stereo imaging system is then established by adopting a catadioptric imaging system, a single-CCD stereo panoramic vision system and the presented skew ray camera calibration method. © 2011 Elsevier GmbH. Source

Lih F.L.,Republic of China Military Academy
Journal of Applied Mechanics and Technical Physics

The aim of the present research is to conduct a numerical study of the characteristic of a two-phase magnetorheological fluid with different operation conditions by the finite volume method called SIMPLE with an add-on MHD code. © 2016, Pleiades Publishing, Ltd. Source

Chang M.-H.,National Cheng Kung University | Chou W.-Y.,National Cheng Kung University | Lee Y.-C.,National Cheng Kung University | Cheng H.-L.,National Cheng Kung University | And 4 more authors.
Applied Physics Letters

Polymorphism control of organic semiconductor films greatly affects optoelectronic device performance. The thin-film phase is always the dominant phase in the early growth of pentacene films; however, the performance of the bulk phase is superior to that of the thin-film phase. In the present study, a nanoimprinted polyimide layer is used to induce the growth of the bulk phase in the early stage. The bulk phase appears in the initial few layers and its dominance of the polymorphisms in the pentacene film increases with increasing thickness. The mechanism of the phase transformation is explained. © 2010 American Institute of Physics. Source

Chiu C.-W.,National Cheng Kung University | Ho Y.-H.,University of Houston | Shyu F.-L.,Republic of China Military Academy | Lin M.-F.,National Cheng Kung University
Applied Physics Express

The band structures and optical properties of AB-stacked multilayer graphene are calculated using the tight-binding model and gradient approximation. For nL-layer AB-stacked graphene, there are n2L excitation channels at both the low and middle frequencies. However, in the excitation spectra, nL (nL - 1) peaks exist at the low frequency for even-layer (odd-layer) systems, and one-shoulder and nL peaks at the middle frequency. With increasing nL, the differences in the spectra between the odd and even layers are reduced. When nL increases to 30 (50), the spectra of 2D and 3D systems are almost identical at the middle (low) frequency. © 2014 The Japan Society of Applied Physics Source

Lee M.-H.,Republic of China Military Academy | Tsung-Chien Chen,Chung Cheng Institute of Technology
Structural Engineering and Mechanics

The innovative intelligent fuzzy weighted input estimation method which efficiently and robustly estimates the unknown time-varying input force in on-line is presented in this paper. The algorithm includes the Kalman Filter (KF) and the recursive least square estimator (RLSE), which is weighted by the fuzzy weighting factor proposed based on the fuzzy logic inference system. To directly synthesize the Kalman filter with the estimator, this work presents an efficient robust forgetting zone, which is capable of providing a reasonable compromise between the tracking capability and the flexibility against noises. The capability of this inverse method are demonstrated in the input force estimation cases of the plate structure system. The proposed algorithm is further compared by alternating bwtween the constant and adaptive weighting factors. The results show that this method has the properties of faster convergence in the initial response, better target tracking capability, and more effective noise and measurement bias reduction. Source

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