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Using Random Butterfly Transformations in Parallel Schur Complement-Based Preconditioning

100%

Baboulin M., Jamal A., Sosonkina M.

Annals of Computer Science and Information Systems

2015

649-654

We propose to use a randomization technique based on Random Butterfly Transformations (RBT) in the Algebraic Recursive Multilevel Solver (ARMS) to improve the preconditioning phase in the iterative solution of sparse linear systems. We integrated the RBT technique into the parallel version of ARMS (pARMS). The preliminary experimental results on some matrices from the Davis' collection show an improvement of the convergence and accuracy of the results when compared with existing implementations of the pARMS preconditioner. (original abstract)

Integration of the TRIZ Matrix and ANP to Select the Reactive Maintenance Tactics Using the Meta-Synthesis Approach

61%

Mortazavi M. A., Amindoust A., Shahin A., Karbasian M.

Management and Production Engineering Review

2021

nr 1

108-118

So far, numerous studies have been published on the selection of appropriate maintenance tactics based on some factors affecting them such as time, cost, and risk. This paper aims to develop the TRIZ contradiction matrix by explaining the dimensions and components of each of the following Reactive maintenance tactics. The related findings of previous studies were analyzed by adopting "Rousseau and Sandoski" seven-step method to identify and extract the relationships between TRIZ principles and Reactive maintenance tactics. Thereafter, 5 Reactive maintenance tactics were replaced TRIZ's 40 principles in the TRIZ contradiction matrix. Finally, the ANP method were used to extract and prioritize the appropriate Reactive maintenance tactics. The proposed matrix in this research was used in the desalination section of one of the oil companies to select on the appropriate Reactive maintenance tactics. The results of this research is useful for managers and maintenance specialists of units in making decisions to provide appropriate Reactive maintenance tactics for the desired equipment. (original abstract)

Rozkłady stabilne w badaniach statystycznych : cz.2 : przykłady i modele

51%

Sacała J.

Prace Naukowe Akademii Ekonomicznej we Wrocławiu

1992

nr 617 Zastosowanie ekonometrii

91-97

Artykuł ten jest drugą częścią cyklu pod tytułem "Rozkłady stabilne w badaniach statystycznych". (...) Teraz chcemy zasygnalizować pewne sytuacje, w których pojawiają się wspomniane rozkłady. (fragment tekstu)