NASA’s Generic Transport Model (GTM) is a remote-controlled, 5.5 percent scale commercial aircraft. An L1 adaptive controller was recently designed and flight tested on the GTM. Oscillations in the elevator command were observed at 1.4 to 2 Hertz during the first flight test in September 2009. In most flight conditions the L1 adaptive controller can be approximated by a linear time-invariant sy...

. In this paper, we develop a quadratic spline collocation method for integrating the nonlinear partial differential equations (PDEs) of a plug flow reactor model. The method is proposed in order to be used for the operation of control design and/or numerical simulations. We first present the Crank-Nicolson method to temporally discretize the state variable. Then, we develop and analyze the pro...

‎The main purpose of this paper is to study the numerical solution of nonlinear Volterra integral equations with constant delays, based on the multistep collocation method. These methods for approximating the solution in each subinterval are obtained by fixed number of previous steps and fixed number of collocation points in current and next subintervals. Also, we analyze the convergence of the...

Background: L1 retrotransposons are the most active mobile DNA elements in human genome. Unregulated L1 retrotransposition may have deleterious effect by disrupting vital genes and inducing genomic instabilities. Therefore, human cells control L1 elements by silencing their activities through epigenetic mechanisms. It has been shown that cell division and heavy metals stimulate the frequency of...

A collocation-Galerkin method is defined for Poisson's equation on the unit 2 square, using tensor products of continuous piecewise polynomials. Optimal L and Hq orders of convergence are established. This procedure requires fewer quadratures than the corresponding Galerkin procedure. Introduction. The collocation-Galerkin method was first introduced by Diaz [2], [3] for the two-point boundary ...

Collocations, i.e., recurrent word combinations such as take advantage (of), strong tea, and deeply absorbed, are receiving increasing attention in SLA research because of their importance to “native-like” production of language. Previous studies suggest that collocations pose a serious challenge to language learners and that learners’ L1 plays a crucial role in this respect. My paper aims to s...

In this paper, we improve b-spline collocation method for Benjamin-Bona-Mahony-Burgers (BBMB) by using defect correction principle. The exact finite difference scheme is used to find defect and the defect correction principle is used to improve collocation method. The method is tested on somemodel problems and the numerical results have been obtained and compared.

The current study is an attempt to investigate the impact of decision-making (selecting and matching) tasks and production (creation of sentences and completion of sentences) tasks on the collocational knowledge of Iranian intermediate EFL learners. To this end, sixty EFL learners were divided into two experimental (decision-making and production) groups. To determine the effects of the tasks, ...

FromTo/JK is a Japanese-to-Korean machine translation system based on direct translation approach due to the syntactic similarity between Japanese and Korean. To resolve the target word ambiguity, transfer uses collocation information of nouns and postpositions, and case frame information of verb. It is evaluated with existing MT systems and shows the best performance.