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Broadcasting in a computer network is a method of transferring a message to all recipients simultaneously. It is common in this situation to use a tree with many leaves to perform the broadcast, as internal nodes have to forward the…

数据结构与算法 · 计算机科学 2020-07-16 Cristina G. Fernandes , Carla N. Lintzmayer

We consider a discrete-time dynamical process on graphs, firstly introduced in connection with a protocol for controlling large networks of spin 1/2 quantum mechanical particles [Phys. Rev. Lett. 99, 100501 (2007)]. A description is as…

组合数学 · 数学 2013-09-17 Simone Severini

We develop two generalizations of contraction theory, namely, semi-contraction and weak-contraction theory. First, using the notion of semi-norm, we propose a geometric framework for semi-contraction theory. We introduce matrix…

系统与控制 · 电气工程与系统科学 2020-10-06 Saber Jafarpour , Pedro Cisneros-Velarde , Francesco Bullo

We implement a version of conformal field theory (CFT) that gives a connection to SLE in a multiply connected domain. Our approach is based on the Gaussian free field and applies to CFTs with central charge $c \leq 1$. In this framework we…

数学物理 · 物理学 2024-07-12 Tom Alberts , Sung-Soo Byun , Nam-Gyu Kang

We study the convergence of the predictive surface of regression trees and forests. To support our analysis we introduce a notion of adaptive concentration for regression trees. This approach breaks tree training into a model selection…

统计理论 · 数学 2016-05-03 Stefan Wager , Guenther Walther

Assign i.i.d. standard exponential edge weights to the edges of the complete graph K_n, and let M_n be the resulting minimum spanning tree. We show that M_n converges in the local weak sense (also called Aldous-Steele or Benjamini-Schramm…

概率论 · 数学 2013-01-15 Louigi Addario-Berry

The weight of the minimum spanning tree in a complete weighted graph with random edge weights is a well-known problem. For various classes of distributions, it is proved that the weight of the minimum spanning tree tends to a constant,…

组合数学 · 数学 2024-05-31 Nikita Zvonkov

We investigate the effect of strain along armchair and zigzag directions on electrical transport in graphene through a magnetic barrier and a linearly polarized electromagnetic wave. In the context of Floquet theory, the eigenvalues and…

介观与纳米尺度物理 · 物理学 2023-02-01 Hasna Chnafa , Miloud Mekkaoui , Ahmed Jellal , Abdelhadi Bahaoui

With applications in distribution systems and communication networks, the minimum stretch spanning tree problem is to find a spanning tree T of a graph G such that the maximum distance in T between two adjacent vertices is minimized. The…

组合数学 · 数学 2017-12-12 Lan Lin , Yixun Lin

The transmission of correlated electrons through a domain wall in ferromagnetic quasi-one-dimensional systems is studied theoretically in the case when the domain wall width is comparable with the Fermi wavelength of the charge carriers.…

强关联电子 · 物理学 2007-05-23 M. A. N. Araujo , V. K. Dugaev , V. R. Vieira , J. Berakdar , J. Barnas

Graph Domain Adaptation (GDA) aims to bridge distribution shifts between domains by transferring knowledge from well-labeled source graphs to given unlabeled target graphs. One promising recent approach addresses graph transfer by…

机器学习 · 计算机科学 2026-02-12 Wei Chen , Xingyu Guo , Shuang Li , Yan Zhong , Zhao Zhang , Fuzhen Zhuang , Hongrui Liu , Libang Zhang , Guo Ye , Huimei He

Three-dimensional (3D) metals/semimetals under magnetic field have an instability toward a density wave (DW) ordering which breaks a translational symmetry along the field direction. Effective boson models for the DW phases take forms of XY…

强关联电子 · 物理学 2017-05-10 Xiao-Tian Zhang , Ryuichi Shindou

Given a directed simple graph G=(V,E) and a nonnegative-valued cost function the power of a vertex u in a directed spanning subgraph H is given by the maximum cost of an arcs of H exiting u. The power of H is the sum of the power of its…

数据结构与算法 · 计算机科学 2012-05-16 Gruia Calinescu

We propose associative domain adaptation, a novel technique for end-to-end domain adaptation with neural networks, the task of inferring class labels for an unlabeled target domain based on the statistical properties of a labeled source…

计算机视觉与模式识别 · 计算机科学 2017-08-04 Philip Haeusser , Thomas Frerix , Alexander Mordvintsev , Daniel Cremers

Transport properties of 2D materials especially close to their boundary has received much attention after the successful fabrication of graphene and other fascinating materials afterwards. While most previous work is devoted to the…

介观与纳米尺度物理 · 物理学 2016-12-15 Fanbing Xia , Jian Wang

Fractional D6-branes on toroidal orbifold backgrounds are known to be able to accommodate the particle spectrum and gauge group of the Standard Model, but up to now exact results for their low-energy effective action are missing. Here we…

高能物理 - 理论 · 物理学 2012-04-02 Gabriele Honecker

Mean field theory models of percolation on networks provide analytic estimates of network robustness under node or edge removal. We introduce a new mean field theory model based on generating functions that includes information about the…

物理与社会 · 物理学 2023-08-01 Chris Jones , Karoline Wiesner

Existing adversarial domain adaptation methods mainly consider the marginal distribution and these methods may lead to either under transfer or negative transfer. To address this problem, we present a self-adaptive re-weighted adversarial…

计算机视觉与模式识别 · 计算机科学 2020-06-03 Shanshan Wang , Lei Zhang

The transmission across a graphene bilayer region is calculated for two different types of connections to monolayer leads. A transfer matrix algorithm based on a tight binding model is developed to obtain the ballistic transmission beyond…

介观与纳米尺度物理 · 物理学 2019-06-05 Hadi Z. Olyaei , Pedro Ribeiro , Eduardo V. Castro

We derive the superconformal transformation properties of the supercurrent for N=1 supersymmetric QED in four dimensions within the superfield formalism. Superconformal Ward identities for Green functions involving insertions of the…

高能物理 - 理论 · 物理学 2009-10-31 J. Erdmenger , C. Rupp , K. Sibold