Stabilities and Settling Times of Nonlinear and Time-varying Feedback Systems     

Daniel E. Frank 《Journal of The Franklin Institute》1972

The bounded-input bounded-output stability, finite time stability and settling time of a single-loop feedback system consisting of a nonlinear time-varying gain followed by a linear time-invariant system are investigated via a nonlinear integral inequality. The gain has the form k₀+k₁(t)+k₂(t)g(bd) where g(bd) is a monotonic increasing function. The system is bounded-input bounded-output stable provided the time-varying gains are L¹(0, t8) functions and is finite time stable for bounded gains. The nonlinear integral inequality, which is used to obtain explicit and useful bounds on the output of the system, is also employed to determine the settling time.  相似文献   

A synthesis of research concerning creative teachers in a Canadian context     

Rosemary C. Reilly  Frank Lilly 《Teaching and Teacher Education》2011,27(3):533-542

Effective teachers are often creative ones, yet an examination of creative teaching is largely invisible in the North American creativity literature. Even within education there is little about teachers’ own creative practice. Nonetheless, there are benefits to studying creative teachers: in education it can explicate ways of enhancing teachers’ creativity and enriching praxis; and in psychology it can extend our understanding of social and interpersonal creativity, as well as everyday creativity. This paper reviews 12 Canadian case studies of creative teaching conducted by a creative teaching research group. An in-depth elaboration of two themes, creative person and community, is presented.  相似文献   

LOVE AND RUIN(S): ROBERT FROST ON MORAL REPAIR     

Jeff Frank 《Educational theory》2011,61(5):587-600

This essay begins where Alasdair MacIntyre's After Virtue begins: facing a moral world in ruin. MacIntyre argues that this predicament leaves us with a choice: we can follow the path of Friedrich Nietzsche, accepting this moral destruction and attempting to create lives in a rootless, uncertain world, or the path of Aristotle, working to reclaim a world in which close‐knit communities sustain human practices that make it possible for us to flourish. Jeff Frank rejects MacIntyre's framework and in this essay attempts to create an alternative path, one of moral repair. Through a close reading of several poems from Robert Frost's North of Boston, Frank develops the notion of moral repair and describes its ethical and educational implications.  相似文献   

II. DEVELOPMENT OF ADOPTED CHILDREN WITH HISTORIES OF EARLY ADVERSITY     

Femmie Juffer  Jesús Palacios  Lucy Le Mare  Edmund J. S. Sonuga‐Barke  Wendy Tieman  Marian J. Bakermans‐Kranenburg  Panayiota Vorria  Marinus H. van IJzendoorn  Frank C. Verhulst 《Monographs of the Society for Research in Child Development》2011,76(4):31-61

This chapter first presents a review of research on the development of adopted children, focusing on meta‐analytic evidence and highlighting comparisons between adopted children with and without histories of early adversity. Some methodological issues arising from this literature are considered as well. Second, 7 longitudinal studies of adopted children's development are described, and the convergence of findings across the longitudinal studies and with the cross‐sectionally based meta‐analytic evidence is discussed. Third, the role of the adoptive family in supporting adopted children's development is explored.  相似文献   

What is the ‘personal’ in ‘personal information’?     

Søe  Sille Obelitz  Jørgensen  Rikke Frank  Mai  Jens-Erik 《Ethics and Information Technology》2021,23(4):625-633

Ethics and Information Technology - Contemporary privacy theories and European discussions about data protection employ the notion of ‘personal information’ to designate their areas of...  相似文献   

From the Editor: Who's Ready For Some Gnarly,Wrinkly, No‐Easy‐Answer Elephants?          下载免费PDF全文

Frank Shushok Jr. 《About Campus》2014,19(2):1-1

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HPT Models: An Overview of the Major Models in the Field     

Frank S. Wilmoth  Christine Prigmore  Marty Bray 《Performance Improvement》2014,53(9):31-42

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From the Editor: These Roads are Made by Walking          下载免费PDF全文

Frank Shushok Jr. 《About Campus》2014,19(5):1-1

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From the Editor: A Famous Painting,A Ski Adventure,and A Trip To The Movies: Tools For Learning?          下载免费PDF全文

Frank Shushok Jr 《About Campus》2014,19(4):1-1

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“干清粪”系统猪粪快速堆肥过程中添加剂对甲烷、氧化亚氮和氨气排放的影响(英文)     

Xiang-ping SUN  Peng LU  Tao JIANG  Frank SCHUCHARDT  Guo-xue LI 《Journal of Zhejiang University. Science. B》2014,(4)

研究目的:在"干清粪"系统猪粪堆肥过程中,不同添加剂(玉米秸秆、锯末和蘑菇渣)处理对甲烷、氧化亚氮和氨气排放的影响。创新要点:将不同的添加剂(玉米秸秆、锯末和蘑菇渣)应用到快速堆肥系统中进行堆肥,测定了猪粪堆肥过程中甲烷、氧化亚氮和氨气的排放规律,为国内猪粪堆肥的应用提供理论指导。重要结论:玉米秸秆作为添加剂能增加猪粪堆肥过程中氧化亚氮的排放;蘑菇渣添加剂增加了堆肥过程中甲烷的排放,然而减少了氧化亚氮及氨气的排放;锯末处理能增加堆肥过程中氨气的排放。添加剂能显著影响堆肥过程中氮素的损失。  相似文献