摘要:

AbstractThe utility of the classical Karhunen‐Loève expansion of a second order process is limited to its practical derivation, because it depends upon the solution of a Fredholm integral equation associated with it whose kernel is the covariance function of the process. So, in this paper we study two numerical procedures for solving such equations, the Rayleigh‐Ritz and the collocation methods, and also essay two different bases ofL2‐orthogonal functions in order to perform the algorithms, Legendre polynomials and trigonometric functions, on two well‐known processes, the Wiener‐Lévy process and the Brownian‐bridge. The accuracy of the numerical results in relation to the real ones, as well as comparative studies among both procedures are

ISSN:8755-0024    

DOI:10.1002/asm.3150080202

出版商:John Wiley&Sons, Ltd.    

年代:1992

数据来源: WILEY

摘要:

AbstractThis paper defines repairable failure‐delay systems, and gives explicit formulae for their availability. It presents models for single‐component, series and parallel systems with delay at system level, and a ‘rare event’ approximation for availability and reliability of series systems with delay at component level. Finally, it uses a renewal terminating process for deriving the limiting distribution of the lifetime of failure‐dela

ISSN:8755-0024    

DOI:10.1002/asm.3150080203

出版商:John Wiley&Sons, Ltd.    

年代:1992

数据来源: WILEY

摘要:

AbstractThe peeling of ad‐dimensional set of points is usually performed with successive calls to a convex hull algorithm; the optimal worst‐case convex hull algorithm, known to have anO(n˙Log (n)) execution time, may give anO(n˙n˙Log (n)) to peel all the set; anO(n˙n) convex hull algorithm,mbeing the number of extremal points, is shown to peel every set with anO(n‐n) time, and proved to be optimal; an implementation of this algorithm is given for planar sets and spatial sets, but the latter give only an approximateO(n˙n) p

ISSN:8755-0024    

DOI:10.1002/asm.3150080204

出版商:John Wiley&Sons, Ltd.    

年代:1992

数据来源: WILEY

摘要:

AbstractAs shown in a companion‐paper,1binary and multinary coherent systems can be studied with unified arguments, through monotone binary coherent systems. These are binary coherent systems submitted to some monotone constraint and generalize the classic theory of free binary coherent systems. By considering the unified point of view thus obtained, this paper gives what is perhaps the most suggestive representation for multinary coherent systems, since this extends the definition of binary coherent systems in terms of series‐parallel (parallel‐series) structures. Then, this paper examines the special case of multinary systems that can be studied directly with the classic theory of free binary coherent systems. It thus enlarges and complements, in a shorter unified manner, the particular cases considered in earlier st

ISSN:8755-0024    

DOI:10.1002/asm.3150080205

出版商:John Wiley&Sons, Ltd.    

年代:1992

数据来源: WILEY

摘要:

AbstractThis short paper takes up the problem stated by Gaul and Schader1in 1988 of simultaneous clustering and aggregation of relations—in this case precedences (preferences)—so that aggregate preferences could represent relatively homogeneous groups of preference relations. The paper indicates the existence of two distinct questions, similar to those asked in the case of the global aggregation problem, regarding intra‐group agreement as to preferences represented in whatever form, and intra‐group agreement as to a common (‘regular’) preference. In both these cases, though, fundamental computational problems arise. This paper presents a heuristic for obtaining an approximate solution. Requirements as to the properly optimal method a

ISSN:8755-0024    

DOI:10.1002/asm.3150080206

出版商:John Wiley&Sons, Ltd.    

年代:1992

数据来源: WILEY

摘要:

AbstractAn approach to assessing the fit of a parametric non‐stationary Poisson process model to data is presented. The approach uses kernel estimation in conjunction with a parametric bootstrap. An example is give

ISSN:8755-0024    

DOI:10.1002/asm.3150080207

出版商:John Wiley&Sons, Ltd.    

年代:1992

数据来源: WILEY

ISSN:8755-0024    

DOI:10.1002/asm.3150080208

出版商:John Wiley&Sons, Ltd.    

年代:1992

数据来源: WILEY

ISSN:8755-0024    

DOI:10.1002/asm.3150080201

出版商:John Wiley&Sons, Ltd.    

年代:1992

数据来源: WILEY