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Quantifying and Clustering Texture Traits in Flowers of Genus Sinningia
( Tzu-ting Hung ),( Hao-chun Hsu ),( Yan-fu Kuo ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1
The flowers of genus Sinningia has a high degree of diversity in stripe and spot patterns. Delimiting these pattern as textural traits usually rely on horticulturalists’ judgment. However, the judgment by intuitive observation is subjective. This study aimed to quantify the stripe and spot pattern of genus Sinningia flowers automatically using machine vision and to cluster the textural traits using machine learning. The image of ventral petal was acquired using flatbed scanners. Two regions of interest (ROI), lobe region and tube region, were identified and were used for the feature quantification. The features of stripe and spot patterns were then quantified from the ROI using Gabor and Laplacian of Gaussian filters, respectively. The k-means clustering algorithm was next applied to the feature of patterns. The clusters were significantly associated with the textural traits.
Tzu-Sung Wu,Mansour Karkoub,Chien-Ting Chen,Wen-Shyong Yu,Ming-Guo Her,Jui-Yiao Su 제어·로봇·시스템학회 2013 International Journal of Control, Automation, and Vol.11 No.6
It is proposed here to use a robust tracking design based on adaptive fuzzy control technique to control a class of multi-input-multi-output (MIMO) nonlinear systems with time delayed uncertainty in which each uncertainty is assumed to be bounded by an unknown gain. This technique will overcome modeling inaccuracies, such as drag and friction losses, effect of time delayed uncertainty, as well as parameter uncertainties. The proposed control law is based on indirect adaptive fuzzy control. A fuzzy model is used to approximate the dynamics of the nonlinear MIMO system; then, two on-line estimation schemes are developed to overcome the nonlinearities and identify the gains of the delayed state uncertainties, simultaneously. The advantage of employing an adaptive fuzzy system is the use of linear analytical results instead of estimating nonlinear system functions with an online update law. The adaptive fuzzy scheme uses a Variable Structure (VS) scheme to resolve the system uncertainties, time delayed uncertainty and the external disturbances such that H∞ tracking performance is achieved. The control laws are derived based on a Lyapunov criterion and the Riccati-inequality such that all states of the system are uniformly ultimately bounded (UUB). Therefore, the effect can be reduced to any prescribed level to achieve H∞ tracking performance. A two-connected inverted pendulums system on carts and a two-degree-of-freedom mass-spring-damper system are used to validate the performance of the proposed fuzzy technique for the control of MIMO nonlinear systems.
Photocatalytic study of Zinc Oxide with bismuth doping prepared by spray pyrolysis
Lin, Tzu-Yang,Hsu, Yu-Ting,Lan, Wen-How,Huang, Chien-Jung,Chen, Lung-Chien,Huang, Yu-Hsuan,Lin, Jia-Ching,Chang, Kuo-Jen,Lin, Wen-Jen,Huang, Kai-Feng Techno-Press 2015 Advances in nano research Vol.3 No.3
The unintentionally doped and bismuth (Bi) doped zinc oxide (ZnO) films were prepared by spray pyrolysis at $450^{\circ}C$ with zinc acetate and bismuth nitrate precursor. The n-type conduction with concentration $6.13{\times}10^{16}cm^{-3}$ can be observed for the unintentionally doped ZnO. With the increasing of bismuth nitrate concentration in precursor, the p-type conduction can be observed. The p-type concentration $4.44{\times}10^{17}cm^{-3}$ can be achieved for the film with the Bi/Zn atomic ratio 5% in the precursor. The photoluminescence spectroscopy with HeCd laser light source was studied for films with different Bi doping. The photocatalytic activity for the unintentionally doped and Bi-doped ZnO films was studied through the photodegradation of Congo red under UV light illumination. The effects of different Bi contents on photocatalytic activity are studied and discussed. Results show that appropriate Bi doping in ZnO can increase photocatalytic activity.
Fang, Ting,Wang, Li-Yi,Lin, Tzu-Bin,Huang, Chia-Kai 서울대학교 교육연구소 2022 Asia Pacific Education Review Vol.23 No.2
The spread of English as a global language has contributed to the trend of recruiting native English-speaking teachers (NESTs) through government-funded schemes around the world, particularly in East Asia. In Taiwan, the NEST scheme has been recently expanded because of the national policy for a bilingual Taiwan in 2030. However, the NEST scheme in Taiwan has the strictest selection criteria and the least attractive incentives in the region. As these unfavorable conditions could affect the recruitment and effectiveness of the NEST scheme, this study explored the advantages and challenges perceived by NEST participants through in-depth interviews with 24 NESTs working in Taiwanese public schools to identify the factors that could influence their attrition and retention. It was found that most advantages were associated with the participants’ schools, such as the provision of resources and a sense of achievement, rather than from outside the schools. However, most of the perceived challenges also occurred inside the schools, such as the lack of collaboration with colleagues and class sizes. These findings suggested that the issues and agendas at the participating schools had the greatest influence on NEST decisions to stay or leave Taiwan. The implications for policymakers and school leaders are discussed and relevant suggestions are made.
An-Chen Lee,Tzu-Wei Kuo,Chung-Ting Ma 한국정밀공학회 2012 International Journal of Precision Engineering and Vol. No.
In this paper, we proposed a control strategy: Combined Product and Tool Disturbance Estimator (CPTDE) which combines threaded double EWMA with the drift compensation scheme, to adaptively estimate the disturbance for a mixproduct situation in semiconductor processes. This approach considers the disturbances are related to the combination of the specific product and the tool, and further separates the error into an intercept term and a drift term, where the former is related to the variation of products, whereas the latter is related to the interaction between the tools and the products. The proposed method continuously updates the intercept and drift terms to obtain the recipe for the next run. The simulation case studies, i.e., the fixed schedule process, the random schedule process, and the periodical schedule process, are conducted and the results show that CPTDE control scheme has best control performance when compared with three recently published control schemes. The method is also applied to the estimation of removal rate in mix-product CMP process. The results show that the proposed method has improvements over product-based EWMA control, CF-EWMA control and threaded PCC control by 9.52%, 2523.43% and 11.71% on average, respectively, for estimating removal rate of historical data in mix-product CMP process.
( Shu-Chen Wei ),( Ting-An Chang ),( Te-Hsin Chao ),( Jinn-Shiun Chen ),( Jen-Wei Chou ),( Yenn-Hwei Chou ),( Chiao-Hsiung Chuang ),( Wen-Hung Hsu ),( Tien-Yu Huang ),( Tzu-Chi Hsu ),( Chun-Chi Lin ) 대한장연구학회 2017 Intestinal Research Vol.15 No.3
Crohn`s disease (CD) is a chronic relapsing and remitting inflammatory disease of the gastrointestinal tract. CD is rare in Taiwan and other Asian countries, but its prevalence and incidence have been steadily increasing. A steering committee was established by the Taiwan Society of Inflammatory Bowel Disease to formulate statements on the diagnosis and management of CD taking into account currently available evidence and the expert opinion of the committee. Thorough clinical, endoscopic, and histological assessments are required for accurate diagnosis of CD. Computed tomography and magnetic resonance imaging are complementary to endoscopic evaluation for disease staging and detecting complications. The goals of CD management are to induce and maintain remission, reduce the risk of complications, and improve quality of life. Corticosteroids are the mainstay for inducing re-mission. Immunomodulating and biologic therapies should be used to maintain remission. Patients should be evaluated for hepatitis B virus and tuberculosis infection prior to treatment and receive regular surveillance for cancer. These consensus statements are based on current local evidence with consideration of factors, and could be serve as concise and practical guidelines for supporting clinicians in the management of patients with CD in Taiwan. (Intest Res 2017;15:285-310)
( Shu-Chen Wei ),( Ting-An Chang ),( Te-Hsin Chao ),( Jinn-Shiun Chen ),( Jen-Wei Chou ),( Yenn-Hwei Chou ),( Chiao-Hsiung Chuang ),( Wen-Hung Hsu ),( Tien-Yu Huang ),( Tzu-Chi Hsu ),( Chun-Chi Lin ) 대한장연구학회 2017 Intestinal Research Vol.15 No.3
Ulcerative colitis (UC) is an inflammatory bowel disease characterized by chronic mucosal inflammation of the colon, and the prevalence and incidence of UC have been steadily increasing in Taiwan. A steering committee was established by the Taiwan Society of Inflammatory Bowel Disease to formulate statements on the diagnosis and management of UC taking into account currently available evidence and the expert opinion of the committee. Accurate diagnosis of UC requires thorough clinical, endoscopic, and histological assessment and careful exclusion of differential diagnoses, particularly infectious colitis. The goals of UC therapy are to induce and maintain remission, reduce the risk of complications, and improve quality of life. As outlined in the recommended treatment algorithm, choice of treatment is dictated by severity, extent, and course of disease. Patients should be evaluated for hepatitis B virus and tuberculosis infection prior to immunosuppressive treatment, especially with steroids and biologic agents, and should be regularly monitored for reactivation of latent infection. These consensus statements are also based on current local evidence with consideration of factors, and could be serve as concise and practical guidelines for supporting clinicians in the management of UC in Taiwan. (Intest Res 2017;15:266-284)