Zobrazeno 61 - 70
of 140
pro vyhledávání: '"Markos V. Koutras"'
Publikováno v:
Journal of Quality Technology. 41:48-59
An acceptance/rejection rule suitable for use in start-up demonstration tests is discussed. The rule allows acceptance of equipment if k consecutive successes occur, while the equipment is rejected if two failures separated by at most r – 2 success
Autor:
Markos V. Koutras, Fotios S. Milienos
Publikováno v:
Statistics & Probability Letters. 78:1639-1648
In Multiple Failure Mode systems (MFM systems) each component may either work or experience one of m ≥ 2 different failure modes. This work presents a lower product-type bound for the MFM system’s reliability function, using the theory of stochas
Autor:
Spiros D. Ladas, Markos V. Koutras, Charalambos Tzathas, Dimitrios Polymeros, Maria Kateri, Angelos A. Papadopoulos
Publikováno v:
Digestive Diseases. 26:80-84
Background and Aims: There are several reports showing a continuing fall in the incidence of acute appendicitis in the western countries. Our aim was to study the trend of the incidence of acute appendicitis in the Greek population over 30 years. Met
Publikováno v:
Probability in the Engineering and Informational Sciences. 22:19-35
In the present article we provide a formula that facilitates the evaluation of the signature of a reliability structure by a generating function approach. A simple sufficient condition is also derived for proving the nonpreservation of the IFR proper
Publikováno v:
Methodology and Computing in Applied Probability. 9:207-224
The aim of this paper is to present the basic principles and recent advances in the area of statistical process control charting with the aid of runs rules. More specifically, we review the well known Shewhart type control charts supplemented with ad
Publikováno v:
Journal of Applied Probability. 43:1137-1154
The discrete scan statistic in a binary (0-1) sequence of n trials is defined as the maximum number of successes within any k consecutive trials (n and k, n ≥ k, being two positive integers). It has been used in many areas of science (quality contr
Publikováno v:
Annals of the Institute of Statistical Mathematics. 60:173-191
The primary aim of the present article is to provide a general framework for investigating the joint distribution of run length accumulating/enumerating variables by the aid of a Markov chain embedding technique. To achieve that we introduce first a
Publikováno v:
Methodology and Computing in Applied Probability. 8:409-426
The most popular multivariate process monitoring and control procedure used in the industry is the chi-square control chart. As with most Shewhart-type control charts, the major disadvantage of the chi-square control chart, is that it only uses the i
Autor:
Markos V. Koutras, Konstadinos Politis
Publikováno v:
Probability in the Engineering and Informational Sciences. 20:231-250
In the literature, most of the bounds for the renewal function U(x) corresponding to a lifetime distribution F are given in terms of the first two moments of F only. The best general upper bound of this type is the one given in Lorden (1970). In the
Autor:
Markos V. Koutras, Konstantinos Triantafyllou, Dimitris Ladas, Spiros D. Ladas, Maria Kateri, Angelos A. Papadopoulos, Charalambos Tzathas
Publikováno v:
Scandinavian Journal of Gastroenterology. 41:1330-1335
Objective. Gallbladder disease is becoming increasingly prevalent in Western countries and is a common cause of hospitalization. The objective of this study was to determine time trends in cholelithiasis and acute cholecystitis for hospitalization an