نتایج جستجو برای: direct search methods design of experiments nelder and mead
تعداد نتایج: 24158401 فیلتر نتایج به سال:
among the low–dimensional allotropes of carbon, nanotubes and graphene have attracted very much attention from nano–science and nanotechnology specialists. they have been proposed as building blocks in nanometer device engineering. however, these structures are not defect–free. in this thesis, we focused on defective carbon nanotubes and graphene, and studied the effect of couple of very common...
A new method was proposed for selecting constants of the modified Likhachev - Volkov microstructural model to describe reversible strain variation during isothermal martensitic transformation in Ti49Ni51 alloy. The experimental data were approximated by solving optimization problem using Nelder Mead method. set parameters found that provided best approximation. Using selected set, qualitatively...
abstract this study examined the relationship between noticing pronunciation and the improvement pronunciation by administering a 50 item story, as proficiency- test in order to investigate the effectiveness of noticing pronunciation on the improvement of pronunciation. accordingly 60 qualified students were selected and assigned to the two groups of experimental and control randomly, each gr...
In recent years, the UAV’s are increasingly becoming main part of both military and commercial operations, where accurate pose estimation is considered as a critical problem to be investigated. UAV pose estimation problem can be investigated through vision based navigation (VBN) approach where visual sensors are augmented with the traditional IMU unit. VBN is based on localizing set of features...
Yinggan Tang, Leijie Qiao, Xinping Guan Abstract This paper deals with the parameter identification of Wiener model with discontinuous nonlinear. The parameter identification problem is converted to an optimal problem with a suitable objective function. A hybrid optimal method, which integrates the Nelder-Mead simplex search and particle swarm optimization (NM-PSO), is used to optimize the obje...
Based on former work on automatic transcription of musical time series into sheet music (Ligges et al. (2002), Weihs and Ligges (2003, 2005)) in this paper parameters of the transcription algorithm are optimized for various real singers. Moreover, the parameters of various artificial singer models derived from the models of Rossignol et al. (1999) and Davy and Godsill (2002) are estimated. In b...
the purpose of this study was to investigate how english language teachers in mashhad who teach students in the pre-university cycle perceived the impact of the efltee on their teaching. the target population was nearly all pre-university english language teachers in seven districts of mashhad in the scholastic year 2008/2009. a survey questionnaire which consisted of (36) likert type items, wa...
Lednicki and Wieczorkowski (2003) presented a method of stratification in subpopulations, based on the paper of Rivest (2002), which leads to obtain a fixed precision of a considered estimator for the particular subpopulations. They solved such a problem using a numerical simplex method of Nelder and Mead (1965). Because it is not the best solution of the question, (in a sense of an optimality ...
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