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Symbol Detection in Low-Resolution Images using a Novel Method
Kuang-Chin Tai,Chien-Hsu Chen 보안공학연구지원센터 2014 International Journal of Control and Automation Vol.7 No.12
The ability to detect taxis, pedestrian walk symbols, zebra crossings, and straight line tactile guide paths and junctions is essential for blind people in any city. This work applies a novel method that detects automatically these five targets via their colors, geometric elements and structural features. To reduce processing time, this method is tailored to low-resolution images that are roughly 80 x 60 pixels. Additionally, another novel method based on the Hough Transform can recognize straight lines, an important geometric element, in low-resolution images. The effectiveness and efficiency of the proposed method are validated experimentally.
Current Scaling and Electron Heating in a GaN/AlGaN Two-Dimensional Electron System
Kuang Yao Chen,Li-Hung Lin,Chin-An Chang,Chi-Te Liang,N. C. Chen,P. H. Chang,Wen-Jang Shiue,Zhi-Hao Sun 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.50 No.6
A GaN/AlGaN two-dimensional electron system (2DES) has been prepared on a Si substrate, and the electron heating effect in the 2DES has been studied experimentally by using the resistance of the 2DES as a self-thermometer. The relation $T_e$ $\sim$ $I^{1.42}$ was obtained, which is in contrast to $T_e$ $\sim$ $I^{0.5}$ in the spin-split resistivity peaks in a GaAs/AlGaAs 2DES. A possible reason for this is discussed
A study on pushover analyses of reinforced concrete columns
Kuang-Yen Liu,Chin-Kuo Su,I-Chau Tsai,Yu-Chi Sung,Kuo-Chun Chang 국제구조공학회 2005 Structural Engineering and Mechanics, An Int'l Jou Vol.21 No.1
This paper proposes a realistic approach to pushover analyses of reinforced concrete (RC) structures with single column type and frame type. The characteristic of plastic hinge of a single RC column subjected to fixed axial load was determined first according to column’s three distinct failure modes which were often observed in the experiments or earthquakes. By using the determined characteristic of plastic hinge, the pushover analyses of single RC columns were performed and the analytical results were investigated to be significantly consistent with those of cyclic loading tests. Furthermore, a simplified methodology considering the effect of the variation of axial force for each RC column of the frame structure during pushover process is proposed for the first time. It would be helpful in performing pushover analysis for the structures examined in this study with efficiency as well as accuracy.
Efficient Cluster Radius and Transmission Ranges in Corona-based Wireless Sensor Networks
( Wei Kuang Lai ),( Chung-shuo Fan ),( Chin-shiuh Shieh ) 한국인터넷정보학회 2014 KSII Transactions on Internet and Information Syst Vol.8 No.4
In wireless sensor networks (WSNs), hierarchical clustering is an efficient approach for lower energy consumption and extended network lifetime. In cluster-based multi-hop communications, a cluster head (CH) closer to the sink is loaded heavier than those CHs farther away from the sink. In order to balance the energy consumption among CHs, we development a novel cluster-based routing protocol for corona-structured wireless sensor networks. Based on the relaying traffic of each CH conveys, adequate radius for each corona can be determined through nearly balanced energy depletion analysis, which leads to balanced energy consumption among CHs. Simulation results demonstrate that our clustering approach effectively improves the network lifetime, residual energy and reduces the number of CH rotations in comparison with the MLCRA protocols.
Xiaoxiang Han,Yingying Kuang,Chunhua Xiong,Xiujuan Tang,Qing Chen,Chin-Te Hung,Li-Li Liu,Shang-Bin Liu 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.7
A series of organic-inorganic composite catalysts, prepared by modifying tungstophosphoric acid (TPA; H3PW12O40) with different amino acids such as phenylalanine (Phe), alanine (Ala), and glycine (Gly) were synthesized. The physicochemical and acidic properties of these (MH)xH3−xPW12O40 (M=Phe, Ala, and Gly; x=1-3) composite materials were characterized by a variety of different analytical and spectroscopic techniques, namely TGA, XRD, FTIR, XPS, and NMR, and exploited as heterogeneous catalysts for selective oxidation of benzyl alcohol (BzOH) with hydrogen peroxide (H2O2). Among them, the [PheH]H2PW12O40 catalyst exhibited the best oxidative activity with an excellent BzOH conversion of 99.0% and a desirable benzaldehyde (BzH) selectivity of 99.6%. Further kinetic studies and model analysis by response surface methodology (RSM) revealed that the oxidation of BzOH with H2O2 follows a second-order reaction with an activation energy of 56.7 kJ·mol−1 under optimized experimental variables: BzOH/H2O2 molar ratio=1 : 1.5mol/mol, amount of catalyst=6.1 wt%, reaction time (x3)=3.8 h, and amount of water (x4)=30.2mL.
A study on pushover analyses of reinforced concrete columns
Sung, Yu-Chi,Liu, Kuang-Yen,Su, Chin-Kuo,Tsai, I-Chau,Chang, Kuo-Chun Techno-Press 2005 Structural Engineering and Mechanics, An Int'l Jou Vol.21 No.1
This paper proposes a realistic approach to pushover analyses of reinforced concrete (RC) structures with single column type and frame type. The characteristic of plastic hinge of a single RC column subjected to fixed axial load was determined first according to column's three distinct failure modes which were often observed in the experiments or earthquakes. By using the determined characteristic of plastic hinge, the pushover analyses of single RC columns were performed and the analytical results were investigated to be significantly consistent with those of cyclic loading tests. Furthermore, a simplified methodology considering the effect of the variation of axial force for each RC column of the frame structure during pushover process is proposed for the first time. It would be helpful in performing pushover analysis for the structures examined in this study with efficiency as well as accuracy.
Che Yu Kuo,Kao Chin Chen,I Hui Lee,Huai-Hsuan Tseng,Nan Tsing Chiu,Po See Chen,Yen Kuang Yang,Wei Hung Chang 대한정신약물학회 2022 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.20 No.2
Objective: The impact of serotonergic system on obsessive-compulsive disorder (OCD) is well studied. However, the correlation between OC presentations and autonomic nervous system (ANS) is still unclear. Furthermore, whether the correlation might be modulated by serotonin is also uncertain. Methods: We recruited eighty-nine healthy subjects. Serotonin transporter (SERT) availability by [123I]ADAM and heart rate variability (HRV) tests were measured. Symptoms checklist-90 was measured for the OC presentations. The interaction between HRV and SERT availability were calculated and the correlation between HRV and OC symptoms were analyzed after stratified SERT level into two groups, split at medium. Results: The interactions were significant in the factors of low frequency (LF), high frequency (HF), and root mean square of successive differences (RMSSD). Furthermore, the significantly negative correlations between OC symptoms and the above HRV indexes existed only in subjects with higher SERT availability. Conclusion: OC symptoms might be correlated with ANS regulations in subjects with higher SERT availability.