Distributed systems and web applications play an important role in computer science nowadays. The most common consideration is performance, because these systems must provide services with low response time, high availability, and certain throughput level. With the help of performance models, the performance metrics can be determined at the early stages of the development process. The goal of o...

Most computer systems contain one or more system resources whose usage is controlled on the basis of workload priorities. Unfortunately, the exact analysis of queueing network models incorporating priority scheduling disciplines is usually infeasible. The MVA Priority Approximation has been proposed as a comparatively inexpensive, and yet reasonably accurate, approximation technique for queuein...

Performance evaluation of distributed systems and service-oriented architectures is often based on stochasticmodels, such as closed queueing networkswhich are commonly solved by theMean Value Analysis (MVA) algorithm. However, the MVA is unable to solve models with hundreds or thousands of users accessing services of multiple classes, a configuration that is often useful to predict the performa...

The Mean Value Analysis (MVA) algorithm of Reiser and Lavenberg is a very simple technique for the solution of fairly complex queueing network models: This paper describes a computer program which uses the MVA algorithm to solve almost all known versions of closed queueing networks which have 'product form' solutions. Introduction Queueing network models of computer systems are emerging as both...

background: percutaneous balloon mitral valvotomy (bmv) is the gold standard treatment for rheumatic mitral stenosis (ms) in that it causes significant changes in mitral valve area (mva) and improves leaflet mobility. development of or increase in mitral regurgitation (mr) is common after bmv. this study evaluated mr severity and its changes after bmv in iranian patients. methods: w e prospecti...

Environmental stress testing (EST) is a reliability test for the semiconductor products that is concerned with how products perform its intended functions under some environmental conditions. Planning, implementation and delivery schedules are affected by the outcome of these tests and it is crucial to determine the throughput of the EST process. In this paper we present an efficient modified a...

In this paper, we analyse Stochastic Petri Net (SPN) models of slotted-ring networks. We show that a simple SPN model of a slotted-ring network, which exhibits a productform solution, yields similar results to a more detailed SPN model that has to be analysed by numerical means. Furthermore, we demonstrate a Mean-Value Analysis (MVA) approach to calculate efficiently the results for the simple ...

This paper is focused on the MVA (mean subtraction, variance normalization, and ARMA filtering) feature postprocessing scheme for noise-robust automatic speech recognition. MVA has shown great success in the past on the Aurora 2.0 and 3.0 corpora. To test its generality, in this work MVA is blindly applied to many different acoustic feature extraction methods, and is evaluated using the Aurora ...

We introduce a new solution technique for closed product-form queueing networks that generalizes the Method of Moments (MoM), a recently proposed exact algorithm that is several orders of magnitude faster and memory efficient than the established Mean Value Analysis (MVA) algorithm. Compared to MVA, MoM recursively computes higher-order moments of queue lengths instead of mean values, an approa...

This study aims to analyze financial performance using Economic Value Added (EVA) and Market (MVA) approaches of state owned Banks (BUMN) listed on Indonesia Stock Exchange. The research methodology used qualitative descriptive research. objects this are the Exchange 2016-2018. data collection techniques secondary panel data. analysis by calculating (MVA). results indicate that 2016-2018 in ter...