Results 21 to 30 of about 11,209 (254)
Energy Reports, 2022 Robust optimization is a practical and effective mathematical framework for coping with uncertainty in the transmission expansion planning (TEP) process, while computing the full convex hull is an outstanding data-driven means of searching for robust ...
Xin Yin +3 more
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IEEE Access, 2019 For the feature tensor of multi-sensor signals classification problem in gear intelligent fault diagnosis, a new tensor classifier named nearest neighbor convex hull tensor classification (NNCHTC) is proposed in this paper.
Zhengyang Cheng, Rongji Wang
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Discrete MathematicsA \emph{thrackle} is a graph drawn in the plane so that every pair of its edges meet exactly once, either at a common end vertex or in a proper crossing. Conway's thrackle conjecture states that the number of edges is at most the number of vertices. It is known that this conjecture holds for linear thrackles, i.e., when the edges are drawn as straight ...
Balázs Keszegh, Dániel Simon
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Hildebrandt's theorem for the essential spectrum [PDF]
Opuscula Mathematica, 2015 We prove a variant of Hildebrandt's theorem which asserts that the convex hull of the essential spectrum of an operator \(A\) on a complex Hilbert space is equal to the intersection of the essential numerical ranges of operators which are similar to \(A\
Janko Bračič, Cristina Diogo
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Formalizing Convex Hull Algorithms [PDF]
, 2001 We study the development of formally proved algorithms for computational geometry. The result of this work is a formal description of the basic principles that make convex hull algorithms work and two programs that implement convex hull computation and have been automatically obtained from formally verified mathematical proofs.
Pichardie, David, Bertot, Yves
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Advanced Functional Materials, EarlyView.Permanent magnets derive their extraordinary strength from deep, universal electronic‐structure principles that control magnetization, anisotropy, and intrinsic performance. This work uncovers those governing rules, examines modern modeling and AI‐driven discovery methods, identifies critical bottlenecks, and reveals electronic fingerprints shared ...
Prashant Singh
wiley +1 more source
Error Analysis of the Convex Hull Method for the Solution of the Distribution System Security Region
EnergiesThe convex hull method is a common approach for the solution of the distribution system security region (DSSR). For the first time, this paper identifies that this method is not applicable to solve many DSSRs.
Jun Xiao, Lixing Wang, Yupeng Zhou
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mRMR-Tri-ConcaveHull Detector for Floating Small Targets in Sea Clutter
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023 For the feature-based detector of small targets in sea clutter, on the one hand, the three-dimensional convex hull-based detector deviates from the distribution of sea clutter vectors in the feature space and only combines the information of low ...
Yanling Shi, Yuefeng Hu
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Imperfect Synthetic Controls. [PDF]
J Appl Econ (Chichester Engl)ABSTRACT The synthetic control method assumes the existence of a perfect synthetic control, which cannot exist if the outcomes are functions of transitory shocks with nonzero asymptotic variance and may not exist even in expectation for the treated unit. This paper first shows the benefits of estimating synthetic controls for all units.
Powell D.
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On Rationally Convex Hulls [PDF]
Transactions of the American Mathematical Society, 1973 For a compact set X ⊆ C n X \subseteq {{\mathbf {C}}^n} , let h r ( X ) {h_r}(X) denote the rationally convex hull of X ...
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