منابع مشابه
Feedback canonical forms of singular systems
Ex = Ax + Bu (1.1) where x e 3C ~ R" e % ~ R, (E, A, B)e R x R x R. Note that E and A are non square. We can always assume without loss of generality that B is monic. In the sequel, (1.1) will be referred to by the triple (E, A, B). Now, let I denote the set of all such (E, A, B)'s. Define T P D = {(W, V, G, FP, FD)eR qXq x R x x R x R x R with W, F a n d G non singular}. The action of this gro...
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We study the feedback group action on single-input nonlinear control systems. We follow an approach of Kang and Krener based on analysing, step by step, the action of homogeneous transformations on the homogeneous part of the system. We construct a dual normal form and dual invariants with respect to those obtained by Kang. We also propose a canonical form and show that two systems are equivale...
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The role of implicit and explicit negative feedback in language acquisition has been of major concern, especially in Second Language Acquisition (SLA). Research in SLA has demonstrated that implicit negative feedback such as recast and implicit expansion are potential triggers of language development and learning. Data from two experiments, using a pretest-posttest experimental control design, ...
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ژورنال
عنوان ژورنال: Science
سال: 2011
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.333.6039.138-b