منابع مشابه
A Tale of Two Beams: Gaussian Beams and Bessel Beams
An overview is given of two types of focused beams, Gaussian beams and Bessel beams. First I describe some of the basic properties of Gaussian beams in homogeneous media which stay collimated over a certain distance range after which they diverge. Bessel beams are then described which are among a class of solutions to the wave equation that are diffraction-free and do not diverge when they prop...
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The TriVis algorithm for visualization of multidimensional data proximities in two dimensions is presented. The algorithm preserves maximum number of exact distances, has simple interpretation, and unlike multidimensional scaling (MDS) does not require costly minimization. It may also provide an excellent starting point significantly reducing the number of required iterations in MDS.
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In this paper we introduce the triangular heap, a heap with the special property that for every father node its right child (if present) is smaller than its left child. We show how triangular heaps can be applied to the traditional problem of sorting an array in situ in ways quite similar to well-known methods using ordinary heaps. An average case analysis is presented for the construction and ...
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Recently, a model consisting of triangular trimers covering the triangular lattice was introduced and its exact free energy given. In this paper we present the complete calculation leading to this exact result. The solution involves a coordinate Bethe ansatz with two kinds of particles. It is similar to that of the square-triangle random tiling model by Widom and Kalugin. The connection of the ...
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ژورنال
عنوان ژورنال: Journal of the Franklin Institute
سال: 1861
ISSN: 0016-0032
DOI: 10.1016/0016-0032(61)90840-7