The fault tree analysis tool Metaprime allows reliability engineers to make, in an interactive way, exact qualitative and quantitative analysis of very complex fault trees that could not be completely treated by previously available analysis technologies. The qualitative aspect of the analysis of a fault tree consists in computing all or part of the set of prime implicants (i.e., minimal cut se...

Fault trees provide a graphical and logical framework for analyzing the reliability of systems. A fault tree provides a conceptually simple modeling framework to represent the system-level interactions between component reliabilities. Dynamic fault trees have been shown particularly useful for reliability analysis of embedded computer systems. Dynamic fault trees are a superset of traditional (...

Many multiple sequence alignment methods (MSAs) use guide trees in conjunction with a progressive alignment technique to generate a multiple sequence alignment but use differing techniques to produce the guide tree and to perform the progressive alignment. In this paper we explore the consequences of changing the guide tree used for the alignment routine. We evaluate four leading MSA methods (P...

Many multiple sequence alignment methods (MSAs) use guide trees in conjunction with a progressive alignment technique to generate a multiple sequence alignment but use differing techniques to produce the guide tree and to perform the progressive alignment. In this paper we explore the consequences of changing the guide tree used for the alignment routine. We evaluate four leading MSA methods (P...

The work presented in this paper used a quantitative analysis of relevant risks through the development fault tree and risk methods to aid real time prediction safety evaluation leak storage tank. Criticality elements their attributes can be with data predict potential failures likely occur. As an example, matrix was rank events that could lead tank make decisions on allowed based past statisti...

To increase reliability, reduce machine tool failure, and shorten maintenance time, serval failure distribution models are discussed based on the cycloidal gears form grinding. A fault data expansion algorithm model radial basis function (RBF) neural network is proposed to accurately evaluate reliability of grinding machines. The uses a self-organizing clustering learning determine RBF centers ...

reliability of a system is the probability that it will function as intended for the required period of time. the opposite of reliability is failure probability per unit time or over time, such as a life cycle. following a review of existing reliability codes and approaches, comprehensive approaches to assess the reliability of offshore structures are described, including probabilistic analysis...

Fault Tree Analysis is a very popular technique to assess safety and reliability of technical systems. However, being a combinatorial model, Fault Trees can only express which combinations of failures contribute to a certain hazard or accident. There is no means to model sequences of actions and temporal orders of states and events. Since today technical systems are often controlled by software...

This talk will review two case studies that examine the effectiveness of using Fuzzy Top Event Probability (FTEP) over the conventional approach. Case study one relates to flash vessel in an ammonia tank, while in case study two ,using fuzzy set theory, the FTEP has been estimated for the existing ammonia storage tank in a large fertilizer complex located in Mumbai, India. In addition, a new fo...