ISSN:8755-0024    

DOI:10.1002/asm.3150010102

出版商:John Wiley&Sons, Ltd.    

年代:1985

数据来源: WILEY

ISSN:8755-0024    

DOI:10.1002/asm.3150010103

出版商:John Wiley&Sons, Ltd.    

年代:1985

数据来源: WILEY

摘要:

AbstractComputation of M. L. estimates for the parameters of a negative binomial distribution from grouped data is considered. For this problem the Scoring, Newton—Raphson and E‐M algorithm is derived. Using simulated data the performance of the algorithms is compared with respect to convergence, number of iterations and computing time. Finally an empirical example drawn from actuarial science is gi

ISSN:8755-0024    

DOI:10.1002/asm.3150010104

出版商:John Wiley&Sons, Ltd.    

年代:1985

数据来源: WILEY

摘要:

AbstractWe consider a set of parts divided into subsets called part types, determined in such a way that the parts belonging to the same part type are manufactured using the same sequence of tasks (i.e. the same working process). We are looking for a partition of the set of part types into subsets called part families, and for a partition of the set of tasks into subsets called production subsystems defined as follows: (1) the number of part families and the number of production subsystems are equal, (2) one (one only one) production subsystem corresponds to each part family, (3) one (and only one) part family corresponds to each production subsystem, (4) the previous partitions minimize the number of tasks performed in a production subsystem different from that which corresponds to the part family containing the part involved. We give a fast algorithm which leads to a good solution depending on the initial set of part families. We also propose an algorithm to find a ‘good’ initial set of part famil

ISSN:8755-0024    

DOI:10.1002/asm.3150010105

出版商:John Wiley&Sons, Ltd.    

年代:1985

数据来源: WILEY

摘要:

AbstractWe studied a population of paraplegic patients in order to give prominence to a possible relationship between the topography of their spinal lesion and the occurrence of special articular diseases (P.O.A.).According to the motor and sensory state of their spinal cord, we first tried to obtain a classification of these lesions (the usual one schematically separates ‘flaccid’ and ‘rigid’ paraplegics).We mainly put the emphasis on this clustering step of the study:— choice and meaning of the data and their coding;— explanation and justification of the method used: thesimilarity aggregation;— interpretation of results a

ISSN:8755-0024    

DOI:10.1002/asm.3150010106

出版商:John Wiley&Sons, Ltd.    

年代:1985

数据来源: WILEY

摘要:

AbstractThe purpose of this paper is to give a mathematical model to generalize the classical approach of compound interest and to overcome the time structure problem of the interest rates. We introduce a suitable stochastic process called the ‘gauge’ process such that its product with the value of any security is assumed to be a martingale in an appropriate probability space. The framework of this model gives a stochastic actualization formula for the pricing of general securities with options and includes Black and Schole's formula without using arbitrage arguments. Emphasis has been placed on numerical calculat

ISSN:8755-0024    

DOI:10.1002/asm.3150010107

出版商:John Wiley&Sons, Ltd.    

年代:1985

数据来源: WILEY

摘要:

AbstractA general description of a discrete software reliability growth model, which adopts the number of test runs or the number of executed test cases as the unit of error detection period, is presented. Two classes of discrete software reliability growth models are proposed and discussed. These models can be described by non‐homogeneous Poisson processes, in which the random variable is denned as the number of errors detected byntest runs (n= 0, 1, 2,…). The application and comparison of these models to actual software error data are sh

ISSN:8755-0024    

DOI:10.1002/asm.3150010108

出版商:John Wiley&Sons, Ltd.    

年代:1985

数据来源: WILEY

ISSN:8755-0024    

DOI:10.1002/asm.3150010101

出版商:John Wiley&Sons, Ltd.    

年代:1985

数据来源: WILEY