نتایج جستجو برای: local region
تعداد نتایج: 1031962 فیلتر نتایج به سال:
To evaluate fall dormancy of twenty alfalfa local ecotypes and exotic cultivars, this study was conducted in two separate experiments (conventional or dense planting and spaced planting) using randomized complete block design with three replications in three growing seasons 2014, 2015 and 2016 in two locations (Karaj and Khoy), Iran. First growing season was considered as estabilishment season....
we study the equilibrium states for an energy functional with a parametric force field on a region of a surface. consideration of free equilibrium states is based on lyusternik - schnirelman's and skrypnik's variational methods. consideration of equilibrium states under a constraint of geometrical character is based on an analog of skrypnik's method, described in cite{vyr3}. in local coordinate...
In this paper the preliminary design of multiple gravity-assist trajectories is formulated as a global optimization problem. An analysis of the structure of the solution space reveals a strong multimodality, which is strictly dependent on the complexity of the model. On the other hand it is shown how an oversimplification could prevent finding potentially interesting solutions. A trajectory mod...
We propose and analyze a class of penalty-function-free nonmonotone trust-region methods for nonlinear equality constrained optimization problems. The algorithmic framework yields global convergence without using a merit function and allows nonmonotonicity independently for both, the constraint violation and the value of the Lagrangian function. Similar to the Byrd–Omojokun class of algorithms,...
All subjects Males Females Right Whole vol 0.390 0.519 0.566 Right Head vol 0.793 0.360 0.412 Right Body vol 0.621 0.613 0.236 Right Tail vol 0.590 0.334 0.704 Shape ROI RDD 0.004 0.031 0.052 Left Whole vol 0.421 0.629 0.527 Left Head vol 0.518 0.269 0.859 Left Body vol 0.787 0.636 0.908 Left Tail vol 0.356 0.442 0.624 Association between Mother’s Depression and Children’s Hippocampal Shape Ana...
An algorithm for the solution of a semismooth system of equations with box constraints is described. The method is an affine-scaling trust-region method. All iterates generated by this method are strictly feasible. In this way, possible domain violations outside or on the boundary of the box are avoided. The method is shown to have strong global and local convergence properties under suitable a...
D. Monticello , B. Blackwell , A. Boozer , A. Brooks , W. A. Cooper , M. Drevlak , G. Fu , R. Goldston , L. Grisham , J. Harris , S. Hirshman , M. Isaev , L. Ku , Z. Lin , J.F. Lyon , P. Merkel , M. Mikhailov , W. Miner , H. Mynick , N. Nakajima , G. Neilson , C. Nührenberg , M. Okamoto , N. Pomphrey , M. Redi , W. Reiersen , A. Reiman , R. Sanchez , J. Schmidt , D. Spong , A. Subbotin , P. Val...
An alternative strategy to solve the subproblems of the Method of Moving Asymptotes (MMA) is presented, based on a trust-region scheme applied to the dual of the MMA subproblem. At each iteration, the objective function of the dual problem is approximated by a regularized spectral model. A globally convergent modification to the MMA is also suggested, in which the conservative condition is rela...
In this paper, we present a nonmonotone adaptive trust region method for unconstrained optimization based on conic model. The new method combines nonmonotone technique and a new way to determine trust region radius at each iteration. The local and global convergence properties are proved under reasonable assumptions. Numerical experiments show that our algorithm is effective.
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