نتایج جستجو برای: topological ordering

تعداد نتایج: 104108  

Journal: :journal of linear and topological algebra (jlta) 2014
m rahimi s.m vaezpour

in this paper we introduce the concept of topological number for locally convex topological spaces and prove some of its properties. it gives some criterions to study locally convex topological spaces in a discrete approach.

2017
Georgia Kougka Anastasios Gounaris

Modern data flows generalize traditional Extract-TransformLoad and data integration workflows in order to enable end-to-end data processing and analytics. The more complex they become, the more pressing the need for automated optimization solutions. Optimizing data flows comes in several forms, among which, optimal task ordering is one of the most challenging ones. We take a practical approach;...

Journal: :Physical review 2022

Kagome lattices host strongly correlated electronic phases and topological band structures. In Mn${}_{3}X$ ($X$ = Ge, Sn), anomalous transport behavior is induced by chiral antiferromagnetic ordering of the manganese spins. Here, authors measure elastic tensors Mn${}_{3}$Sn discover some largest magnetoelastic coupling ever reported for itinerant antiferromagnets. This highlights importance str...

Journal: :Inf. Process. Lett. 1994
G. Ramalingam Thomas W. Reps

Ramalingam, G. and Reps, T., On competitive on-line algorithms for the dynamic priority-ordering problem. The vertices of a directed acyclic graph (DAG) are said to be correctly prioritized if every vertex v in the graph is assigned a priority, denoted by priority(v), such that if there is an edge in the DAG from vertex v to vertex w then priority(v) < priority(w). The dynamic priority-ordering...

Journal: :Nanoscale 2016
Tae-Hyeon Kim KwangSik Jeong Byung Cheol Park Hyejin Choi Sang Han Park Seonghoon Jung Jaehun Park Kwang-Ho Jeong Jeong Won Kim Jae Hoon Kim Mann-Ho Cho

In a three-dimensional topological insulator Bi2Se3, a stress control for band gap manipulation was predicted but no systematic investigation has been performed yet due to the requirement of large external stress. We report herein on the strain-dependent results for Bi2Se3 films of various thicknesses that are grown via a self-organized ordering process. Using small angle X-ray scattering and R...

Journal: :CoRR 2017
Matthew de Brecht

We identify four countable topological spaces S2, S1, SD, and S0 which serve as canonical examples of topological spaces which fail to be quasi-Polish. These four spaces respectively correspond to the T2, T1, TD, and T0-separation axioms. S2 is the space of rationals, S1 is the natural numbers with the cofinite topology, SD is an infinite chain without a top element, and S0 is the set of finite...

2007
Gregory Dudek Dimitri Marinakis

In this paper, we consider the exploration of topological environments by a robot with weak sensory capabilities. We assume only that the robot can recognize when it has reached a vertex, and can assign a cyclic ordering to the edges leaving a vertex with reference to the edge it arrived from. Given this limited sensing capability, and without the use of any markers or additional information, w...

Journal: :JIDM 2016
Walter Perez Urcia Denis Deratani Mauá

An effective approach for learning Bayesian network structures is to perform a local search on the space of topological orderings, followed by a systematic search of compatible parent sets. Typically, the local search is initialized with an ordering generated uniformly at random. This can lead to poor local optima, slow down convergence and hurt the performance of the method. In this work we de...

2018
Charles N. Melton Sheida T. Riahinasab Amir Keshavarz Benjamin J. Stokes Linda S. Hirst

When nanoparticle self-assembly takes place in an anisotropic liquid crystal environment, fascinating new effects can arise. The presence of elastic anisotropy and topological defects can direct spatial organization. An important goal in nanoscience is to direct the assembly of nanoparticles over large length scales to produce macroscopic composite materials; however, limitations on spatial ord...

2012
Takuya Ohzono Jun-ichi Fukuda

Spatially confined liquid crystals exhibit non-uniform alignment, often accompanied by self-organised topological defects of non-trivial shape in response to imposed boundary conditions and geometry. Here we show that a nematic liquid crystal, when confined in a sinusoidal microwrinkle groove, exhibits a new periodic arrangement of twist deformations and a zigzag line defect. This periodic orde...

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