Decentralized adaptive output-feedback control of interconnected nonlinear time-delay systems using minimal neural networks     

Yun Ho Choi  Sung Jin Yoo 《Journal of The Franklin Institute》2018,355(1):81-105

This paper presents a minimal-neural-networks-based design approach for the decentralized output-feedback tracking of uncertain interconnected strict-feedback nonlinear systems with unknown time-varying delayed interactions unmatched in control inputs. Compared with existing approximation-based decentralized output-feedback designs using multiple neural networks for each subsystem in lower triangular form, the main contribution of this paper is to provide a new recursive backstepping strategy for a local memoryless output-feedback controller design using only one neural network for each subsystem regardless of the order of subsystems, unmeasurable states, and unknown unmatched and delayed nonlinear interactions. In the proposed strategy, error surfaces are designed using unmeasurable states instead of measurable states and virtual controllers are regarded as intermediate signals for designing a local control law at the last step. Using Lyapunov stability theorem and the performance function technique, it is shown that all signals of the total controlled closed-loop system are bounded and the transient and steady-state performance bounds of local tracking errors can be preselected by adjusting design parameters independent of delayed interactions.  相似文献   

Improving moral reasoning among college students: a game-based learning approach     

Wenyeh Huang  Jonathan C. Ho 《Interactive Learning Environments》2018,26(5):583-596

Considering a company’s limited time and resources, an effective training method that improves employees’ ability to make ethical decision is needed. Based on social cognitive theory, this study proposes that employing games in an ethics training program can help improve moral reasoning through actively engaging learners. The experimental design with an ethic board game as the experimental group and ethics instructions as the comparison group was conducted to examine the effectiveness of a game-based ethic training method on improving moral reasoning. Results show that using games in an ethics training program significantly decreases respondents’ importance rating on issues associated with lower stages of an individual’s cognitive moral development (CMD) and increases their importance rating on issues associated with the highest stage of CMD. In addition, a game-based ethics training program was found to produce significantly greater change on the importance rating towards issues associated with the middle stage of CMD than a non-game based ethics training program. These findings suggest that a game-based ethics training program could effectively develop moral reasoning, and shape moral views better than a non-game-based training program. Discussions and suggestions for future research were included to conclude this study.  相似文献   

Lifestyles and gendered patterns of leisure and sporting interests among Irish adolescents     

Ann MacPhail  Connie Collier  Mary O'Sullivan 《Sport, Education and Society》2013,18(3):281-299

This paper strives to provide an insight into the multifaceted relationships that young people have, examining the social, cultural and institutional discourses, which shape their lives. We set out to discuss, from an empirical poststructuralist perspective, the way in which Irish adolescents write about the reality of their lives and privilege certain practices and forms of subjectivity. We are particularly interested in the role and significance of physical activity in the lives of young people, asking what institutional and cultural discourses are brought into play to construct particular identities and social practices associated with leisure and sporting interests. This paper focuses on a purposeful sample of 168 written narratives of Irish post-primary students (14–17 years of age), chosen to represent the gender of students, a range of rural and urban school locales from different geographic locations and single sex and co-educational schools. We focus on the inter-relationships between (1) family and friends; (2) community-localism and tradition; (3) commodification and globalisation; (4) popular culture; and (5) gendered patterns of leisure and sporting interests. The family is a strong focal point for these young people as are their friends and being part of a community. The young people (boys in particular) are significant consumers of ‘media sport’ and both girls and boys were knowledgeable of national and international politics. We also comment on the extent to which female and male adolescents negotiate, similarly or differently, culturally dominant discourses within physical activity and sport, with significantly more boys choosing to write about physical activity and sport in their narratives.  相似文献   

A new paradigm for evolution     

Ho MW  Saunders P  Fox S 《New scientist (1971)》1986,109(1497):41-43

Standard evolutionary theory sees little beyond the natural selection of random variation. Yet there is more to life.  相似文献   

陶行知教育思想对当代各国及地区偏乡教育的启示     

何俊青  孙刚成 《北京教育学院学报》2017,31(4)

当前世界各国及地区的偏乡教育面临发展困境,存在偏乡小规模学校裁并、偏乡小规模学校校本课程开发、应试主义主导的偏乡学校文化取向、偏乡学校教师角色及偏乡学校与社区互动等现实问题,陶行知先生的偏乡教育思想对于当今世界各国及地区的偏乡教育实践仍然具有很强的现实指导意义:即偏乡教育需要与社区融合打造社区文化中心并演绎为基于当地生活的活教育,让偏乡教育成为有根的教育,引导偏乡学校的学生建立对在地文化与环境的认同.  相似文献   

Is children's spelling naturally stage-like?     

Connie K. Varnhagen  Michelle McCallum  Meridith Burstow 《Reading and writing》1997,9(5-6):451-481

Children's spelling development is often described by researchers and educators as proceeding through a series of stages. Two properties of stages were analyzed in this study. If spelling development can be characterized by stages, then it should be possible to observe qualitatively different spellings at different points in development. In addition, spellings within a point of development must be consistent. Spelling samples were obtained from stories written by children in first through sixth grade. Stage classifications of spellings for (a) silent -e long vowel words (e.g., bake), and (b) regularly affixed past tense words phonologically represented as /t/ (e.g., helped), /d/ (e.g., opened), and /ed/ (e.g., listed) were analyzed. Little evidence was found for either predicted qualitative differences in stage classification of errors or in stage constancy across grades. Implications for theories of spelling development and instructional practice are discussed.  相似文献   

Correction to: Challenges for doctoral education in East Asia: a global and comparative perspective     

J. C. Shin  Gerard A. Postiglione  K. C. Ho 《Asia Pacific Education Review》2018,19(2):157-157

  相似文献   

A comparison of Australian and Chinese teachers' attributions for student problem behaviors     

Irene T. Ho 《教育心理学》2004,24(3):375-391

The present study compared Australian and Chinese teachers' causal attributions for student behavior. A total of 204 Australian teachers and 269 Chinese teachers rated the importance of four causes (ability, effort, family, teacher) of six student problem behaviors. Results showed that both groups of teachers attributed misbehaviors most to student effort and least to teacher factors. Chinese teachers emphasized family factors more while Australian teachers placed greater importance on ability. There was significant variation in attribution patterns for different types of problems, with effort attribution being equally and strongly emphasized across cultural contexts and behavior types. The results are interpreted in the light of how individualistic and collectivistic values influence teacher thinking, and implications for school‐based interventions for behavior problems are discussed.  相似文献   

A Model for Supervising School Counseling Students Without Teaching Experience     

Jean Sunde Peterson  Connie Deuschle 《Counselor Education & Supervision》2006,45(4):267-281

Changed demographics of those now entering the field of school counseling argue for changes in preparatory curriculum, including the curriculum for supervision. The authors present a 5‐component model for supervising graduate students without previous school experience that is based on 2 pertinent studies. This model focuses on information for administrators and site supervisors about research related to nonteachers; immersion in the school context and in other youth‐oriented venues; observation of school culture; structure for site supervision; and awareness regarding development, classroom skills, and lesson planning. Included are sample strategies for addressing the needs of nonteachers through program structure, curriculum, and site supervision.  相似文献   

Chinese students at an English-Language university: Prediction of academic performance   总被引：1，自引：0，他引：1  

J. A. Spinks  D. Y. F. Ho 《Higher Education》1984,13(6):657-674

There is a paucity of systematic research on prediction of success at the tertiary education level for Asian students, despite the important role that universities play in Asian communities, and despite the increasing numbers of such students who are coming to the West to study. This study reviews evidence collected over the past ten to fifteen years, which relates to the issue of prediction of academic performance of Chinese students at an English-Language and Western-oriented university - the University of Hong Kong. This review is complemented by an analysis of data collected longitudinally over a five year period, using multiple regression, multiple correlation, path analysis and canonical correlation analyses. The results provide evidence of factors which are important in determining the ability of a student to adapt to the foreign cultural and language barriers that exist at this university. In particular, ability in English language and mathematics provides good and reasonably independent predictors of success. The data show the importance of considering the cultural background of students when assessing their aptitude for study, and offer information for Western universities regarding their admissions procedures for Chinese students.  相似文献