نتایج جستجو برای: projections

تعداد نتایج: 52979  

1998
Mark R. Greenstreet Ian M. Mitchell

This paper describes three techniques for reachability analysis for systems modeled by ordinary diierential equations (ODEs). First, linear models with regions modeled by convex polyhedra are considered, and an exact algorithm is presented. Next, non-convex polyhedra are considered , and techniques are presented for representing a polyhedron by its projection onto two-dimensional subspaces. Thi...

2006
Ping Li Trevor J. Hastie Kenneth W. Church

Abstract We1 propose methods for improving both the accuracy and efficiency of random projections, the popular dimension reduction technique in machine learning and data mining, particularly useful for estimating pairwise distances. Let A ∈ Rn×D be our n points in D dimensions. This method multiplies A by a random matrix R ∈ RD×k, reducing the D dimensions down to just k . R typically consists ...

Journal: :Comput. Graph. Forum 2016
Shusen Liu Peer-Timo Bremer J. J. Jayaraman Bei Wang Brian Summa Valerio Pascucci

Linear projections are one of the most common approaches to visualize high-dimensional data. Since the space of possible projections is large, existing systems usually select a small set of interesting projections by ranking a large set of candidate projections based on a chosen quality measure. However, while highly ranked projections can be informative, some lower ranked ones could offer impo...

Journal: :Journal of Functional Analysis 1994

Journal: :Journal of Approximation Theory 1977

Journal: :Journal of Microscopy 2004

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