Recursive spectral bisection (RSB) is a heuristic technique for finding a minimum cut graph bisection. To use this method the second eigenvector of the Laplacian of the graph is computed and from it a bisection is obtained. The most common method is to use the median of the components of the second eigenvector to induce a bisection. We prove here that this median cut method is optimal in the se...

This paper presents a comparison of two methods of analysis of uncertainty arising from uncertain model parameters. The first method is Monte Carlo simulation that treats parameters as random variables bound to a given probabilistic distribution and evaluates the distribution of the resulting output. The second one is fuzzy logic-based alpha-cut analysis in which uncertain parameters are treate...

Statistical Quality Control is a valuable strategy that applies to the statistical technique for monitoring manufacturing system under particular situations. On other hand, fuzzy set theory an ideal instrument cope with unclear situation. The existing studies are restricted, and there still mystery behind data. This paper deals technique: namely, control chart based on process capability indice...

The problem of machine tool selection among available alternatives has been critical issue for most companies in fast-growing markets for a long time. In the presence of many alternatives and selection criteria, the problem becomes a multiple-criteria decision making (MCDM) machine tool selection problem. Therefore, most companies have utilized various methods to successfully carry out this dif...

In most control and engineering applications, the use of fuzzy system as a way to improve the humtzn-computer interaction has becoming popular. This paper reports on the use of fuzzy system in mineral processing specifically in determining the parameter d50c of hydrocyclone. However, wit,h the inputoutput data provided to build the fuzzy rule base, it normally results in a sparse fuzzy rule bas...

maximizing economic earnings is the most common goal in cut-off grade optimization of open-pit mining operations. when this is the case, the price of the product has a critical effect on optimum value of cut-off grade. this paper investigates the relationship between optimum cut-off grade and price to maximize total cash flow and net percent value (npv) of operation. in order to visualize this ...

The present paper describes the individual analytical methodologies (Thermal Ionization Mass Spectrometry, Inductively Coupled Plasma Mass Spectrometry and Alpha Spectrometry) that were developed for uranium age determination and discusses their advantages and drawbacks. With respect to a potential application of the methods (e.g. Fissile Material Cut-off Treaty), the discussion focuses on high...

  Background: Pediatric lower urinary tract scoring system (PLUTSS) is a questionnaire contains items for assessment of wetting episodes, voiding frequency and pattern. It is used for screening and evaluation of the response of children with lower urinary tract symptoms to therapy. We studied the validity and reliability of Persian translated version of this questionnaire among Iranian children...