Tracking control of nonlinear automobile idle-speed time-delay system via differential geometry approach     

Ting-Li Chien  Ching-Yu Hsu 《Journal of The Franklin Institute》2005,342(7):760-775

This paper is concerned with the problem of global asymptotical tracking of single-input single-output (SISO) nonlinear time-delay control systems. Based on the input-output feedback linearization technique and Lyapunov method for nonlinear state feedback synthesis, a robust globally asymptotical output tracking controller design methodology for a broad class of nonlinear time-delay control systems is developed. The underlying theoretical approaches are the differential geometry approach and the composite Lyapunov approach. One utilizes the parameterized co-ordinate transformation to transform the original nonlinear system into singularly perturbed model and the composite Lyapunov approach is then applied for output tracking. For the view of practical application, the proposed control methodology has been successfully applied to the famous nonlinear automobile idle-speed control system.  相似文献   

Undergraduates’ implementations of learning stations as their service learning among elementary school students     

Chin-Wen Chien 《Education 3-13》2017,45(2):209-226

Service learning provides pre-service educators with a context for having hands-on field experience and also assists in understanding the theory and practice. This study discusses 7 undergraduates' implementations of learning stations as their service learning with 28 elementary school students. Through thematic data analysis of interviews, observation field notes, activity designs, and discussion posts, this study presented the following major findings. First, elementary school students, seven undergraduates, and a cooperative elementary school English teacher held positive attitudes towards the implementation of learning stations, because these developed children's cooperation and word recognition skills. Second, undergraduates and cooperative teachers gained professionalism through reflection and cooperation, in terms of activity designs, classroom management, and interpersonal skills development with kids and adults. Five suggestions are provided in order to effectively implement undergraduates' activity designs for learning stations as their service learning among elementary school students.  相似文献   

Pre-Service Teachers’ Innovation on English Activity Designs and Materials for Young Learners     

Chin-Wen Chien 《The Teacher Educator》2019,54(1):4-21

Innovative designs on instructional strategies and activities for teaching English among younger learners were integrated into a language teacher education program in a university in northern Taiwan. This study analyzed 90 pre-service teachers’ final projects, questionnaires, and class materials to explore their innovations on English activity designs and materials. This study had three major findings. First, participants failed to identify the authentic materials taken from daily life. Second, participants integrated the materials into warm-up, presentation, or production of the lesson, rather than incorporating them throughout the whole instruction. Third, participants, their peers, and in-service teachers had different perceptions of innovation criteria. In order to effectively foster pre-service teachers’ innovation in designing instructional activities, three suggestions are provided.  相似文献   

Integration of technical vocabulary into peer observation of teaching for Taiwanese elementary school English teachers’ professional learning     

Chin-Wen Chien 《Education 3-13》2019,47(2):176-190

This study explored the integration of technical vocabulary into pre-observation conferences and its influence on English teachers’ professional learning and discussion in their post-observation conferences. The conceptual framework based on Harvey [2011. “A Sociocultural-Theory-Based Study of the Impact of Mediation During Post-observation Conferences on Language Teacher Learning.” Unpublished doctoral diss., University of South Florida] and Goe, Biggers, and Croft [2012. Linking Teacher Evaluation to Professional Development: Focusing on Improving Teaching and Learning. Denver, CO: National Comprehensive Center for Teacher Quality] was used to analyse the questionnaire, audio recordings, and documents collected in seven peer observations of teaching in Taiwan. This study has two major findings. First, English teachers regarded the technical vocabulary as stimuli for their professional learning; however, the range of technical vocabulary used during the post-observation conferences was limited. Second, three major factors affected their use of technical vocabulary. A new model was proposed in order to effectively integrate technical vocabulary into peer observations of teaching for elementary school English teachers’ professional learning.  相似文献   

“Omics” and Biomedical Informatics: The Future of Pathology and Pathology Informatics. But,are we Ready for the Future?     

Wong MC  Udayan R  Yee KC 《Indian journal of clinical biochemistry : IJCB》2011,26(3):217-221

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中国薯蓣属根状茎组系统分类的初步研究     

裴鉴  丁志遵  秦慧贞  舒璞  唐世蓉  张涵庆 《中国科学院研究生院学报》1979,17(3):61-72

   本文根据我国薯蓣属(Dioscorea L．)根状茎组(Sect.  Stenophora Uline)的外部形态特征、细胞染色体数、花粉形态、植物化学成分、地理分布等的规律，证明根状茎组是该属中的一个比较原始的自然类群：1．具横走的多年生地下根状茎，其它组是一年生或多年生的块茎；2．大部分是2倍体，其它组是多倍体；3．花粉粒单沟型，外壁纹饰网纹或颗粒条纹，其它组为双沟型，外壁纹饰网纹；4．含甾体皂甙元(steroidal sapogenin)，其它组不含。   我们的研究观察证明，N．N．TepaCNMeHKO根据R.Knuth系统(1924)提出的薯蓣皂甙元在该属中无分布规律的说法是无充分依据的。   本文讨论了某些组或种的划分及系统位置：取消sect.Illigerestrum Prain et Burk.；将马    肠薯蓣(D．simulans Prain et Burk．)改属根状茎组；触丝薯蓣(D．tentaculigera Prain et Burk.)应列入顶生翅组  (Sect．shannicorea Prain et Burk．)，  并提出了盾叶薯蓣  (D. zingiberensis  Wright)和穿龙薯蓣(D．nipponica Makino)种的划分和定名的意见。  相似文献   

Study of a multigenerational learning program in Taiwan     

Hung-Ju Chien  D. B. Tann 《Educational gerontology》2017,43(12):619-629

The aim of the Multigenerational Learning Program (MLP) is to increase multigenerational interactions through activities, which will help all learners including middle aged to older adults, university students, and children to improve multigenerational understanding, and increase their positive attitudes toward each other. The MLP activities were conducted between February 2012 and June 2014. A total of 196 middle aged to older adults, 10 university students and 163 children participated in multiple sessions. The authors’ survey results revealed that the participating children’s attitude toward the adults and elder generations became somewhat more positive from pre-test to post-test, but not significantly. Interestingly, it was also shown that elder participants’ attitudes toward the children did not change significantly from pre-test to post-test. Furthermore, all participants enjoyed participation in the MLP and demonstrated strong interest in repeating the program.

The Multigenerational Learning Program (MLP) undoubtedly has a role to play in the social context of the Taiwan today. Taiwan has an aging population, as the birth rate has declined and people are living longer in the meanwhile (Hong, Hwang, Liang, & Chang, 2008). Recently, it has been argued that Taiwanese societies hold negative stereotypes and misconceptions about the elderly and the aging process including traits like physical and mental deterioration, depression, irritability, dependence, inactivity, and isolation. Such negative views could lead to age-based discrimination (Hong et al., 2008). Unfortunately, developing positive attitudes toward older adults has become increasingly difficult, given that many children do not have the opportunities they once had for continued contact with the elderly due to changing family structures, increasing in single-parent and two working-parent families, and often, families relocate to communities that offer more job opportunities (Martin, Springate, & Atkinson, 2010).  相似文献   

Internet‐based Science Learning: A review of journal publications     

Silvia Wen‐Yu Lee  Ying‐Tien Wu  Meng‐Jung Tsai  Tzu‐Chien Liu  Fu‐Kwun Hwang 《International Journal of Science Education》2013,35(14):1893-1925

Internet‐based science learning has been advocated by many science educators for more than a decade. This review examines relevant research on this topic. Sixty‐five papers are included in the review. The review consists of the following two major categories: (1) the role of demographics and learners' characteristics in Internet‐based science learning, such as demographic background, prior knowledge, and self‐efficacy; and (2) the learning outcomes derived from Internet‐based science learning, such as attitude, motivation, conceptual understanding, and conceptual change. Some important conclusions are drawn from the review. For example, Internet‐based science learning is equally favorable, or in some cases more so, to learning for female students compared to male students. The learner's control is essential for enhancing students' attitudes and motivation toward learning in Internet‐based science learning environments. Nevertheless, appropriate guidance from teachers, moderators, or the Internet‐based learning environment itself is still quite crucial in Internet‐based science learning. Recommendations for future research related to the effects of Internet‐based science learning on students' metacognitive reflections, epistemological development, and worldviews are suggested.  相似文献   

A study of the development of contemporary monasteries in Taiwan     

Shih Chih Ming  Kao Hsiao Chien 《Inter-Asia Cultural Studies》2013,14(3):401-419

This study investigates the modernization of Buddhist Monasteries, as illustrated by three famous monasteries in Taiwan, Fo Guang Shan, Ten Directions Monastery, and Chung Tai Chan Temple. With these three case studies, on one hand we can compare them with traditional Buddhist architecture; on the other hand, we can also observe whether the space form and building style of Buddhist architecture had adjusted, transformed or even changed accordingly as a whole, while the Buddhist monasteries in Taiwan were, at that time, facing the modernization of Buddhism.  相似文献   

Predictors and Outcomes of Early vs. Later English Language Proficiency Among English Language Learners     

Halle T  Hair E  Wandner L  McNamara M  Chien N 《Early childhood research quarterly》2012,27(1):1-20

The development of English language learners (ELLs) was explored from kindergarten through eighth grade within a nationally representative sample of first-time kindergartners (N = 19,890). Growth curve analyses indicated that, compared to native English speakers, ELLs were rated by teachers more favorably on approaches to learning, self control, and externalizing behaviors in kindergarten and generally continued to grow in a positive direction on these social/behavioral outcomes at a steeper rate compared to their native English-speaking peers, holding other factors constant. Differences in reading and math achievement between ELLs and native English speakers varied based on the grade at which English proficiency is attained. Specifically, ELLs who were proficient in English by kindergarten entry kept pace with native English speakers in both reading and math initially and over time; ELLs who were proficient by first grade had modest gaps in reading and math achievement compared to native English speakers that closed narrowly or persisted over time; and ELLs who were not proficient by first grade had the largest initial gaps in reading and math achievement compared to native speakers but the gap narrowed over time in reading and grew over time in math. Among those whose home language is not English, acquiring English proficiency by kindergarten entry was associated with better cognitive and behavioral outcomes through eighth grade compared to taking longer to achieve proficiency. Multinomial regression analyses indicated that child, family, and school characteristics predict achieving English proficiency by kindergarten entry compared to achieving proficiency later. Results are discussed in terms of policies and practices that can support ELL children's growth and development.  相似文献