Reliability Analysis of Repairable Systems Using Stochastic Point Processes

In order to analyze the failure data from repairable systems, the homogeneous Poisson process (HPP) is usually used. In general, HPP cannot be applied to analyze the entire life cycle of a complex, re-pairable system because the rate of occurrence of failures (ROCOF) of the system changes over time rather than remains stable. However, from a practical point of view, it is always preferred to apply the simplest method to address problems and to obtain useful practical results. Therefore, we attempted to use the HPP model to analyze the failure data from real repairable systems. A graphic method and the Laplace test were also used in the analysis. Results of numerical applications show that the HPP model may be a useful tool for the entire life cycle of repairable systems.

Research on Preventive Maintenance Strategy of Simulator Based on Reliability Theory

Based on the theory of reliability, this paper studies the preventive maintenance strategy of the simulator with incomplete maintenance, and establishes the preventive maintenance model with the aim of simulating the maintenance cost and simulating machine availability. The main contents of this paper are as follows： Firstly, this paper introduces the background and significance of this paper, expatiates the relevant concepts and mathematical foundation of simulator maintenance related theory and reliability maintenance thought, simulator performance degradation law, Weibull parameter estimation method, As the center of the maintenance （RCM） theory of system maintenance decision analysis.

WELL-POSEDNESS OF THE MODEL DESCRIBING A REPAIRABLE,STANDBY,HUMAN & MACHINE SYSTEM

By using the strong continuous semigroup theory of linear operators we prove the existence of a unique positive time-dependent solution of the model describing a re-pairable, standby, human & machine system.

FURTHER RESEARCH OF A NEW KIND OF SERIES REPAIRABLE SYSTEM

This paper is devoted to studying the uniqueness and existence of the system dynamic solution by using C0-semigroup theory and discussing its exponential stability by analyzing the spectrul distribution of system operator and its quasi-compactness. Some primary reliability indices are discussed with the eigenfunction of system operator and the optimal vacation time to get the maximum system profit is analyzed at the end of paper.

A Multi-indentured Repairable Inventory System with Limited and Different Diagnostic Repair Resources

This paper describes the characteristics of a single-base repairable inventory system and multi-indenture structure with communality and redundancy. At the base, there are a working field that has a maximum of z equipment on line and its repair channels, which mainly consist of two centers： line replaceable units （LRUs） diagnostic center and shop replaceable units （SRUs） repair center. In these two centers, the resources are finite and different. We introduce routing probabilities to express the repair relationships between resources and failed replaced units. The diagnostic time follows exponential distribution and SRU repair time follows general distribution with known average. We analyze the general model of this system, and present an approximate solution that uses two-step negative binomial approximation to obtain the expected backorders of all LRUs. The first step is fitting negative binomial distributions to the distributions of the number for all SitUs at the repair center, and the second is fitting negative binomial distributions to the convolutions of the distributions of the number for all LRUs in diagnostic and assemblydelayed. Thus, we give the approximate value of operational awilability of equipment based on this method. Finally, the results under two policies of routing probabilities are compared by the optimal curves.

Intelligibility and Segmental Phoneme Repair Strategies in English-as-a-Lingua-Franca Interactions among Chinese and Japanese Speakers of English

This is a qualitative study of the types of segmental repair that maintain mutual intelligibility in English-as-a-Lingua-Franca interactions among Chinese and Japanese speakers of English （Jenkins, 2000; Matsumoto 2011; O＇Neal 2015a, 2015b, 2015c, 2015d, 2016, in press）. Repair refers to a set of practices through which conversation participants stop the ongoing action to attend to actual or potential problems 1：o the maintenance of mutual intelligibility （Schegloff, 2007; N^meth, 2012）. Although anything can potentially be a problem to the maintenance of mutual intelligibility, this study focuses only on instances of the repair of segmental phonemes so that the pronunciation remains mutually intelligible. Using conversation analytic methodology to examine a corpus of repair sequences concerning pronunciation among Chinese and Japanese students at a Japanese university, this study claims that three segmental repair strategies are used in the interactions to maintain mutually intelligible pronunciation： segmental phoneme modification, segmental phoneme insertion, and segmental phoneme deletion.

Steady Availability of Parallel Redundant Repairable Systems

By analyzing the spectrum location of system operator of redundant repairable system, this paper proved that the dynamic solutions of the system converge to the steady solution. Moreover, the normalized steady solution is just the steady availability of the system.