We show that, for the M/M/∞ queue in a Markovian random environment, the joint probability distribution function (pdf) of the two variables: random phase and number of customers in the system, is equal to the product of the corresponding marginal pdfs if and only if the ratio of arrival rate to service rate is the same for all phases. We explicitly derive this joint pdf. Furthermore, for the ge...

Based on uncertainty theory, a twostage supply chain model is presented, where the customers’ demands are characterized as uncertain variables. The objective is to minimize the combined costs incurred in the manufacturing and logistics phases. When these uncertain variables are linear, the objective function and constraints can be converted into crisp equivalents, then can be solved by traditio...

Abstract. In this paper, we discuss about the concept of single server feedback retrial queueing system with two types of service and each type consist of two essential phases under variant vacation policy. Customers are allowed to balk and renege at particular times. By using the supplementary variables method, steady state probability generating function for system size and orbit size are obt...

Money-Laundering causes a higher prevalence of crime and reduces the desire tending to invest in productive activities. Also, it leads to weaken the integrity of financial markets and decrease government control over economic policy. Banks are able to prevent theft, fraud, money laundering conducted by customers through identification of their clients’ behavioral characteristics. This leads to ...

introduction pressure ulcers are tissue damages resulting from blood flow restriction, which occurs when the tissue is exposed to high pressure for a long period of time. these painful sores are common in patients and elderly, who spend extended periods of time in bed or wheelchair. in this study, a continuous pressure and temperature monitoring system was developed for pressure ulcer preventio...

introduction: nowadays, organizations perform segmentation of their customers in order to maximize profits and minimize costs. however, in addition to segmentation, an optimal combination of the customers, i.e. the number of the customers or their percentage, is required to be specified in order to invest on development of products and services. in this study, by maximizing the customers’ satis...

purpose: the aim of this study was to investigate the barriers to information seeking behaviors (in the phases of needs identification, information seeking, designing search strategy formula, and using information) of faculty members of islamic azad university of shiraz based on the expansion of dervin’s sense making theory (kari’s theory). methodology: this is an applied study using the survey...

classifying customers using data mining algorithms, enables banks to keep old customers loyality while attracting new ones. using decision tree as a data mining technique, we can optimize customer classification provided that the appropriate decision tree is selected. in this article we have presented an appropriate model to classify customers who use internet banking service. the model is deve...