نتایج جستجو برای: p power convexification method

تعداد نتایج: 3129501  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده برق و کامپیوتر 1391

in the area of automotive engineering there is a tendency to more electrification of power train. in this work control of an induction machine for the application of electric vehicle is investigated. through the changing operating point of the machine, adapting the rotor magnetization current seems to be useful to increase the machines efficiency. in the literature there are many approaches wh...

Journal: :Discrete Mathematics 1986
Károly Böröczky Imre Bárány Endre Makai János Pach

The following conjecture of Fejes T6th is proved: The density of a lattice of convex bodies in [w” is at least i, provided that each connected component of the complementary set is bounded. The cases of equality are also determined. For any polytope P in [w” one can define a convexification P* (see Section 1) and it is proved that Vol P S Vol P*. It is also shown that if P and P’ are two convex...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ارومیه 1377

the methods which are used to analyze microstrip antennas, are divited into three categories: empirical methods, semi-empirical methods and full-wave analysis. empirical and semi-empirical methods are generally based on some fundamental simplifying assumptions about quality of surface current distribution and substrate thickness. thses simplificatioms cause low accuracy in field evaluation. ful...

2012
D. H. Fang C. Li X. Q. Yang

We consider the DC optimization problem (P) inf x∈X {(f1(x) − f2(x)) + (g1(Ax) − g2(Ax))}, where f1, f2, g1 and g2 are proper convex functions defined on locally convex Hausdorff topological vector spaces X and Y respectively, and A is a linear continuous operator from X to Y . Adopting the standard convexification technique, a Fenchel dual problem of (P) is given. By using properties of the ep...

Journal: :Journal of Global Optimization 2009

Journal: :International Journal of Aerospace Engineering 2022

Optimal control problems are common in aerospace engineering. A Python software program called PySCP is described for solving multiple-phase optimal using sequential convex programming methods. By constructing a series of approximated second-order cone subproblems, approaches to the solution original problem an iterative way. The key components detail, including convexification, discretization,...

2001
Arkadii V. KRYAZHIMSKII A. V. Kryazhimskii

For a class of infinite-dimensional minimization problems with nonlinear equality constraints, an iterative algorithm for finding global solutions is suggested. A key assumption is the convexity of the “epigraph”, a set in the product of the image spaces of the constraint and objective functions. A convexification method involving randomization is used. The algorithm is based on the extremal sh...

2014
Chiara Binelli

In the 1990s, in many countries, wages became a more convex function of education: returns to college increased and returns to intermediate education declined. This paper argues that an important cause of this convexification was a two-stage demand-supply interaction: an increased demand for educated workers stimulated a supply response; an increased supply of intermediate-educated workers furt...

2016
Ramtin Madani Javad Lavaei Ross Baldick

This paper is concerned with the power system state estimation (PSSE) problem that aims to find the unknown operating point of a power network based on a given set of measurements. We first study the power flow (PF) problem as an important special case of PSSE, which is known to be non-convex and NP-hard in the worst case. To this end, we propose a set of semidefinite programs (SDPs) with the p...

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