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   

A uniformly loaded infinite-length thin plate bent to a cylindrical surface in the presence of couple-stresses     

Y.C. Hsu 《Journal of The Franklin Institute》1971

Exact solutions, based on couple-stresses plane strain theory of elasticity, are presented for the normal, shear and couple-stresses, displacements and rotations of an infinite-length (in z-axis) rectangular thin plate simply supported at two opposite edges (i.e.x=±L) and bent by a uniform load. Exact solutions reduce to classical values as l→0. Here l is defined as the new elastic material constant taking account of couple stresses.  相似文献   

A Theoretical Model for Preparing Incarcerated Youth for Careers in an Increasingly Technological World: Computational Logic as a Vehicle for Improving Human Decision-making Skills     

Karen Burstein  Craig J. Forsyth  Raymond W. Biggar  Sonya Hsu  Steven Dick  Paula Zeanah 《Journal of Criminal Justice Education》2017,28(3):411-427

Most youth in juvenile delinquent systems end up incarcerated due in part to poor decision-making skills. This study describes a theoretical framework undergirding the relationships across delinquency, learning climate, decision-making, and computational logic. This framework will inform a team of educators, criminologists, and psychologists, and their peers in computer science and mathematics, instructional software design, and content experts as they build and test an innovative instructional model for youth in secure care settings. The goal of the system is to improve human decision-making skills, while preparing youth for further education potentially leading to careers in STEM fields.  相似文献   

'Lesson Rainbow': the use of multiple representations in an Internet-based, discipline-integrated science lesson     

Ying-Shao Hsu 《British journal of educational technology : journal of the Council for Educational Technology》2006,37(4):539-557

This paper presents the development and evaluation of a web‐based lesson—Lesson Rainbow. This lesson features multiple representations (MRs), which purposefully deliver concepts in relation to distinctive disciplinary subject areas through story‐based animations that are closely related to learners’ life experiences. The researchers selected 58 2nd‐year junior high school students as the participants (32 males and 26 females). A quasi‐experimental method together with semi‐structured interviews was utilised. This research project was intended to investigate students’ conceptual progress, and to evaluate the use of MRs and of situated learning components in the design of Lesson Rainbow. The statistical results indicated that: (1) students’ science concepts significantly increased (t= 3.84, p < 0.01) through the use of Lesson Rainbow, and (2) students thought that the use of MRs in this web‐based lesson was an effective pedagogical tool inasmuch as it allows for the learning of specific theoretical viewpoints in addition to the necessary background information. Lesson Rainbow employing MRs helps learners to understand the meanings of, and interrelationships between, different kinds of external representations. This kind of design facilitates their understanding of the correspondence between abstract symbolic expressions and real‐world situations.  相似文献   

Immersion experiences and behavioural patterns in game-based learning     

Mei-En Hsu  Meng-Tzu Cheng 《British journal of educational technology : journal of the Council for Educational Technology》2021,52(5):1981-1999

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Promoting children's inquiry performances in alternate reality games: A mobile concept mapping-based questioning approach     

Hsin-Yi Liang  Tien-Yu Hsu  Gwo-Jen Hwang 《British journal of educational technology : journal of the Council for Educational Technology》2021,52(5):2000-2019

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Effects of applying a VR-based two-tier test strategy to promote elementary students’ learning performance in a Geology class     

Shao-Chen Chang  Ting-Chia Hsu  Wei-Chen Kuo  Morris Siu-Yung Jong 《British journal of educational technology : journal of the Council for Educational Technology》2020,51(1):148-165

Science and technology are driving people’s life changes, including education and the environment. Many scholars have attempted to import technology into the classroom to help students learn in different subjects. However, students often need assistance with unfamiliar learning approaches and learning environments. This study proposed a non-immersive virtual reality (VR) guidance system combined with a two-tier strategy to help students learn geology knowledge. Two groups of students used different learning approaches: the experimental group students were guided by the two-tier test VR guidance system, and the control group students learned with the conventional VR guidance system. According to the experimental result, the two-tier test VR guidance system not only improved the students’ learning achievement in natural science, but also enhanced their learning motivation. In addition, according to the sequential results, we found that VR learning materials or environmental resources can help students answer questions and solve problems more effectively.  相似文献   

Using a concept mapping strategy to improve the motivation of EFL students in Google Hangouts Peer-Tutoring Sessions with native speakers     

Ting-Chia Hsu 《Interactive Learning Environments》2019,27(2):272-285

This study examines four elements of learner motivation, attention, relevance, confidence, and satisfaction, in an EFL speaking course that uses the computer mediated communication (CMC) tool Google Hangouts. The study found that a preparatory concept mapping task before the CMC sessions improved students’ perceived attention, relevance, confidence, and satisfaction. However, follow-up reflective worksheets had no effect on perceived attention, relevance, confidence, or satisfaction. Instructors should use concept mapping in a pre-task to support learners engaged in CMC-based speaking activities with native and non-native speakers. When the students used concept mapping to prepare for the CMC-based speaking activities, they exhibited higher confidence in their oral practice activities with a native speaker.  相似文献   

Effects of explicit and implicit prompts on students’ inquiry practices in computer-supported learning environments in high school earth science     

Su-Chi Fang  Wei Hsiu Hsu 《International Journal of Science Education》2016,38(11):1699-1726

The study explored how to best use scaffolds for supporting students’ inquiry practices in computer-supported learning environments. We designed a series of inquiry units assisted with three versions of written inquiry prompts (generic and context-specific); that is, three scaffold-fading conditions: implicit, explicit, and fading. We then examined how the three scaffold-fading conditions influenced students’ conceptual understanding, understanding of scientific inquiry, and inquiry abilities. Three grade-10 classes (N?=?105) participated in this study; they were randomly assigned to and taught in the three conditions. Data-collection procedures included a pretest–posttest approach and in-depth observations of the target students. The findings showed that after these inquiry units, all of the students exhibited significant learning gains in conceptual knowledge and performed better inquiry abilities regardless of which condition was used. The explicit and fading conditions were more effective in enhancing students’ understanding of scientific inquiry. The fading condition tended to better support the students’ development of inquiry abilities and help transfer these abilities to a new setting involving an independent socioscientific task about where to build a dam. The results suggest that fading plays an essential role in enhancing the effectiveness of scaffolds.  相似文献   

分支系统学当前的理论和方法概述及华东地区山胡椒属十二个种的分支系统学研究   总被引：5，自引：0，他引：5  

桑涛  徐炳声 《中国科学院研究生院学报》1996,34(1):12-18

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