نتایج جستجو برای: hull
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We model the joint dynamics of stock prices and interest rates using a hybrid Direct citations removed from abstract according to journal style – OK? Also, changes to first sentence of text OK? SABR–Hull–White model. The asset price dynamics are modeled by the SABR model of Hagan et al and the interest rate dynamics are modeled by the Hull– White short-rate model. We propose a projection formul...
In this paper, we study properties of general closed convex sets that determine the closed-ness and polyhedrality of the convex hull of integer points contained in it. We first present necessary and sufficient conditions for the convex hull of integer points contained in a general convex set to be closed. This leads to useful results for special class of convex sets such as pointed cones, stric...
The evenly convex hull of a given set is the intersection of all the open halfspaces which contain such set (hence the convex hull is contained in the evenly convex hull). This paper deals with nite dimensional linear systems containing strict inequalities and (possibly) weak inequalities as well as equalities. The number of inequalities and equalities in these systems is arbitrary (possibly in...
In this paper we address the problem of computing a minimal H-representation of the convex hull of the union of k H-polytopes in R. Our method applies the reverse search algorithm to a shelling ordering of the facets of the convex hull. Efficient wrapping is done by projecting the polytopes onto the two-dimensional space and solving a linear program. The resulting algorithm is polynomial in the...
This note concerns the computation of the convex hull of a given set P = {p1, p2, . . . , pn} of n points in the plane. Let h denote the size of the convex hull, ie the number of its vertices. The value h is not known beforehand, and it can range anywhere from a small constant to n. We hav e already seen that any convex hull algorithm requires at least Ω(n lg n) time in the worst case, and have...
Artificial Intelligence aims to produce autonomous systems capable of demonstrating intelligent behaviour. One way of doing it is to attempt to replicate processes used in human intelligence. This thereby closely links Artificial Intelligence with Cognitive Science. This project is about the design, implementation and testing of an agent architecture based on cognitive models. It especially foc...
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In this paper we determine the computational complexity of the dynamic convex hull problem in the planar case. We present a data structure that maintains a finite set of n points in the plane under insertion and deletion of points in amortized O(logn) time per operation. The space usage of the data structure is O(n). The data structure supports extreme point queries in a given direction, tangen...
Visual hull reconstruction is the process of generating three dimensional scene geometry from silhouette images captured from different views of a scene. The visual hull is the shape maximally consistent with its silhouette projection [4]. It has been popular due to its good approximating qualities for many objects and its ease and speed of implementation. It is commonly used as a starting poin...
Rice hull, the outer cover of the rice grain, determines grain shape and size. Changes in the rice hull proteome in different growth stages may reflect the underlying mechanisms involved in grain development. To better understand these changes, isobaric tags for relative and absolute quantitative (iTRAQ) MS/MS was used to detect statistically significant changes in the rice hull proteome in the...
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