Results 141 to 150 of about 2,535,217 (348)
A Quantised Push‐Sum Distributed Adaptive Momentum Algorithm for Optimisation Over Directed Networks
CAAI Transactions on Intelligence Technology, EarlyView.ABSTRACT In this paper, we investigate a distributed constrained optimisation problem over directed networks. The agents in the networks conduct local computations and communications, endeavouring to collaboratively minimise the aggregation of all locally known convex cost functions subject to a global constraint set.
Qingguo Lü +6 more
wiley +1 more source
Singular M-matrices which may not have a nonnegative generalized inverse
Special Matrices, 2014 A matrix A ∈ ℝn×n is a GM-matrix if A = sI − B, where 0 < ρ(B) ≤ s and B ∈WPFn i.e., both B and Bthave ρ(B) as their eigenvalues and their corresponding eigenvector is entry wise nonnegative.
Sushama Agrawal N. +2 more
doaj +1 more source
Matrix measures and random walks [PDF]
In this paper we study the connection between matrix measures and random walks with a tridiagonal block transition matrix. We derive sufficient conditions such that the blocks of the n-step transition matrix of the Markov chain can be represented as ...
Zygmunt, M. +3 more
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The British Journal of Sociology, EarlyView.ABSTRACT The 2000s have witnessed a significant, worldwide boom in new art museums founded by private, wealthy collectors. While the arts have long been a key arena for the remaking of elite distinction and the reproduction of inequalities, this surge in private museums has sparked much controversy.
Sara de Andrade Silva +2 more
wiley +1 more source
Cross‐Ownership and Welfare‐Inferior Price Competition with Relative Profit Delegation Contracts
Bulletin of Economic Research, EarlyView.ABSTRACT We consider management reward contracts based on relative profit performance under cross‐ownership and find nonequivalence of price and quantity competition. We also examine an endogenous choice of competition mode under unilateral cross‐ownership and show that the welfare‐inferior price competition can appear unless the product's ...
Mingqing Xing, Sang‐Ho Lee
wiley +1 more source
Topology‐based Visual Analysis of Hydrothermal Plumes
Computer Graphics Forum, EarlyView.Abstract Hydrothermal plumes are turbulent structures of intense heat and mineral smoke that rise and disperse into the deep ocean. Existing models generally characterize these systems as a single axisymmetric plume originating from a point source. However, this assumption breaks down in weakly venting, spatially distributed systems, where low‐flux ...
Adhitya Kamakshidasan +3 more
wiley +1 more source
Groundwater Monitoring &Remediation, EarlyView.Abstract The long‐term and frequent sampling of groundwater monitoring networks is common practice for monitoring the concentrations of constituents of potential concern (CoPC) over space and time. Sampling can be a costly and time‐intensive process that also incurs health and safety risks. A redundancy‐based ranking of candidate sampling locations can
Peter Radvanyi +5 more
wiley +1 more source
UNMF: a unified nonnegative matrix factorization for multi-dimensional omics data. [PDF]
Brief Bioinform, 2023 Abe K, Shimamura T.
europepmc +1 more source
Multivariate Nonnegative Quadratic Mappings
In this paper we study several issues related to the characterization of speci c classes of multivariate quadratic mappings that are nonnegative over a given domain, with nonnegativity de ned by a pre-speci ed conic order.In particular, we consider the ...
Zhang, S., Sturm, J.F., Luo, Z-Q
core
Low-rank matrix approximation with weights or missing data is NP-hard [PDF]
Weighted low-rank approximation (WLRA), a dimensionality reduction technique for data analysis, has been successfully used in several applications, such as in collaborative filtering to design recommender systems or in computer vision to recover ...
GILLIS, Nicolas, GLINEUR, François
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