Results 41 to 50 of about 4,609,055 (154)
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
Class Angular Distortion Index for Dimensionality Reduction
Computer Graphics Forum, EarlyView.Abstract Dimensionality reduction (DR) techniques are often characterized by whether they preserve global, high‐level structures in the data or local, neighborhood structures. This distinction matters in visualization: global methods can obscure clusters while local methods can over‐emphasize them.
Kaviru Gunaratne +2 more
wiley +1 more source
LU decomposition of totally nonnegative matrices [PDF]
, 2012 A uniqueness theorem for an LU decomposition of a totally nonnegative matrix is ...
Lenagan, T.H., Goodearl, K.R.
core +1 more source
Fisheries Oceanography, EarlyView.ABSTRACT We developed and evaluated a fishery‐dependent catch‐per‐unit‐effort (CPUE)‐based proxy index for juvenile Japanese anchovy (Engraulis japonicus) recruitment‐related variability in the southeastern coastal waters of Korea. The proxy was constructed from bimonthly CPUE of the smallest juvenile size class (20–40 mm) in the anchovy drag‐net ...
Jin Yeong Kim +5 more
wiley +1 more source
, 2011 Totally nonnegative matrices arise in a remarkable variety of mathematical applications. This book is a comprehensive and self-contained study of the essential theory of totally nonnegative matrices, defined by the nonnegativity of all subdeterminants ...
Charles R. Johnson, Shaun M. Fallat
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IMPROVED TESTS AND CHARACTERIZATIONS OF TOTALLY NONNEGATIVE MATRICES [PDF]
, 2014 Totally nonnegative matrices, i.e., matrices having all minors nonnegative, are considered. A condensed form of the Cauchon algorithm which has been proposed for finding a param-eterization of the set of these matrices with a fixed pattern of vanishing ...
Mohammad Adm +4 more
core +1 more source
International Statistical Review, EarlyView.Summary Understanding the spread of infectious diseases such as COVID‐19 is crucial for informed decision‐making and resource allocation. A critical component of disease behaviour is the velocity with which disease spreads, defined as the rate of change between time and space.
Fernando Rodriguez Avellaneda +2 more
wiley +1 more source
Jordan Structures of Totally Nonnegative Matrices
, 2005 An n × n matrix is said to be totally nonnegative if every minor of A is nonnegative. In this paper we completely characterize all possible Jordan canonical forms of irreducible totally nonnegative matrices.
Shaun M. Fallat, Michael I. Gekhtman
core +1 more source
With‐Replacement Balanced Sampling
Scandinavian Journal of Statistics, EarlyView.ABSTRACT Balanced sampling ensures that selected samples allow Horvitz–Thompson estimators to reproduce known auxiliary totals. However, no efficient procedures currently exist for producing balanced samples with replacement despite their potential applications to balanced imputations or balanced stream sampling.
Jean Rubin, Guillaume Chauvet
wiley +1 more source
Is the World Getting Smaller? Network‐Driven Heterogeneity in Gravity‐Model Elasticities
The World Economy, EarlyView.ABSTRACT Gravity models constitute the workhorse of empirical international trade research, yet the temporal stability of their core parameters—distance and GDP elasticities—remains underexplored, particularly in relation to the evolving structure of trade networks.
Zsolt T. Kosztyán +2 more
wiley +1 more source