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The degree distributions of many real world networks follow power-laws whose exponents tend to fall between two and three. Within the framework of the Barabasi-Albert model (BA model), we explain this empirical observation by a simple fact.…

物理与社会 · 物理学 2009-05-19 Shinji Tanimoto

Demand response providers (DRPs) are intermediaries between the upper-level distribution system operator and the lower-level participants in demand response (DR) programs. Usually, DRPs act as leaders and determine electricity pricing…

系统与控制 · 电气工程与系统科学 2025-09-04 Xin Li , Li Ding , Qiao Lin , Zhen-Wei Yu

A key barrier to using reinforcement learning (RL) in many real-world applications is the requirement of a large number of system interactions to learn a good control policy. Off-policy and Offline RL methods have been proposed to reduce…

机器学习 · 计算机科学 2022-12-02 Wenqi Cui , Linbin Huang , Weiwei Yang , Baosen Zhang

In distributed optimization, the practical problem-solving performance is essentially sensitive to algorithm selection, parameter setting, problem type and data pattern. Thus, it is often laborious to acquire a highly efficient method for a…

最优化与控制 · 数学 2024-01-04 Daokuan Zhu , Tianqi Xu , Jie Lu

In dynamic programming (DP) and reinforcement learning (RL), an agent learns to act optimally in terms of expected long-term return by sequentially interacting with its environment modeled by a Markov decision process (MDP). More generally…

机器学习 · 计算机科学 2022-01-03 Mastane Achab , Gergely Neu

Recently several authors have proposed stochastic evolutionary models for the growth of complex networks that give rise to power-law distributions. These models are based on the notion of preferential attachment leading to the ``rich get…

物理与社会 · 物理学 2007-05-23 Trevor Fenner , Mark Levene , George Loizou

We developed a novel direct algorithm to derive the mass-ratio distribution (MRD) of short-period binaries from an observed sample of single-lined spectroscopic binaries (SB1). The algorithm considers a class of parameterized MRDs and finds…

天体物理仪器与方法 · 物理学 2017-10-18 Sahar Shahaf , Tsevi Mazeh , Simchon Faigler

A two--step Christoffel function based solution is proposed to distribution regression problem. On the first step, to model distribution of observations inside a bag, build Christoffel function for each bag of observations. Then, on the…

机器学习 · 计算机科学 2015-11-24 Vladislav Gennadievich Malyshkin

Using a model based on generalised Lotka Volterra dynamics together with some recent results for the solution of generalised Langevin equations, we show that the equilibrium solution for the probability distribution of wealth has two…

统计力学 · 物理学 2008-12-10 Peter Richmond , Sorin Solomon

We describe a new approach for managing aleatoric uncertainty in the Reinforcement Learning (RL) paradigm. Instead of selecting actions according to a single statistic, we propose a distributional method based on the second-order stochastic…

机器学习 · 计算机科学 2020-10-08 John D. Martin , Michal Lyskawinski , Xiaohu Li , Brendan Englot

Understanding the structure and evolution of online bipartite networks is a significant task since they play a crucial role in various e-commerce services nowadays. Recently, various attempts have been tried to propose different models,…

物理与社会 · 物理学 2015-06-11 C. -X. Zhang , Z. -K. Zhang , C. Liu

We introduce a new framework that performs decision-making in reinforcement learning (RL) as an iterative reasoning process. We model agent behavior as the steady-state distribution of a parameterized reasoning Markov chain (RMC), optimized…

机器学习 · 计算机科学 2022-10-14 Edoardo Cetin , Oya Celiktutan

We are concerned with obtaining well-calibrated output distributions from regression models. Such distributions allow us to quantify the uncertainty that the model has regarding the predicted target value. We introduce the novel concept of…

机器学习 · 统计学 2019-05-16 Hao Song , Tom Diethe , Meelis Kull , Peter Flach

Offline reinforcement learning (RL) recently gains growing interests from RL researchers. However, the performance of offline RL suffers from the out-of-distribution problem, which can be corrected by feedback in online RL. Previous offline…

机器学习 · 计算机科学 2025-06-25 Shuncheng He , Hongchang Zhang , Jianzhun Shao , Yuhang Jiang , Xiangyang Ji

We study offline reinforcement learning (RL) which seeks to learn a good policy based on a fixed, pre-collected dataset. A fundamental challenge behind this task is the distributional shift due to the dataset lacking sufficient exploration,…

机器学习 · 计算机科学 2023-10-11 Wenzhuo Zhou

We consider the problem of learning a set of probability distributions from the empirical Bellman dynamics in distributional reinforcement learning (RL), a class of state-of-the-art methods that estimate the distribution, as opposed to only…

机器学习 · 计算机科学 2020-12-10 Thanh Tang Nguyen , Sunil Gupta , Svetha Venkatesh

In this paper, we question the rationale behind propagating large numbers of parameters through a distributed system during federated learning. We start by examining the rank characteristics of the subspace spanned by gradients across…

机器学习 · 计算机科学 2022-02-02 Sheikh Shams Azam , Seyyedali Hosseinalipour , Qiang Qiu , Christopher Brinton

Breadth First Search (BFS) and other graph traversal techniques are widely used for measuring large unknown graphs, such as online social networks. It has been empirically observed that an incomplete BFS is biased toward high degree nodes.…

离散数学 · 计算机科学 2011-02-23 Maciej Kurant , Athina Markopoulou , Patrick Thiran

A rank-dependent deactivation mechanism is introduced to network evolution. The growth dynamics of the network is based on a finite memory of individuals, which is implemented by deactivating one site at each time step. The model shows…

物理与社会 · 物理学 2015-05-14 Xin-Jian Xu , Ming-Chen Zhou

Precise representation of large-scale undirected network is the basis for understanding relations within a massive entity set. The undirected network representation task can be efficiently addressed by a symmetry non-negative latent factor…

机器学习 · 计算机科学 2022-03-09 Weiling Li , Xin Luo