NDLI: jMarkov package:a stochastic modeling tool

Content Provider	ACM Digital Library
Author	Akhavan-Tabatabaei, Raha Cote, Marco Riano, German Perez, Juan Fernando Sarmiento, Andres Goez, Julio
Abstract	When analyzing real life stochastic systems in most cases is easier, cheaper and more effective to use analytical models rather than studying the physical system or a simulation model of it. The stochastic modeling is a powerful tool that helps the analysis and optimization of stochastic systems. However the use of stochastic modeling is not widely spread in today's industries and among practitioners. This lack of acceptance is caused by two main reasons the first being the curse of dimensionality, which is defined by the number of states required to describe a system. This number grows exponentially as the size of the system increases. The second reason is the lack of user-friendly and efficient software packages that allow the modeling of the problem without involving the user with the implementation of the solution algorithms to solve it. The curse of dimensionality is a constant problem that has been addressed by different approaches through time, but it is not intended within the scope of our work; our focus is on the latter issue. We propose a generic solver that enables the user to focus on modeling without getting involved in the complexity required by the solution methods. We design an object oriented framework for stochastic modeling with four components namely, jMarkov which models Markov Chains, jQBD which models Quasi Birth and Death Processes, jPhase which models Phase Types Distributions and jMDP which models Markov Decision Processes. We concentrate all our effort on creating a software that allows the user to model any kind of system like a Markov Chain, QBD or MDP with fairly basic knowledge of programming. To this end we separate the modeling part from the solution algorithms; therefore the user only needs to mathematically model the problem and the software will do the rest. However, we leave the package with the possibility that experienced users can code their own solution algorithms; this is done since the package only contains the most common algorithms found in the literature. The software does not use external plain files like '.txt' or '.dat' written with specific commands, but rather it is based on OOP (Object Oriented Programming). The main advantages of it include implementation in Java framework, which allows the computational representation of the model to be very similar to its mathematical representation such that it would become natural to pass from one to another. Also the program possesses the usual characteristics of Java such as the use of inheritance and abstraction. Finally, Java is a high level computational language so the user doesn't need to be concerned about technical problems.
Starting Page	48
Ending Page	48
Page Count	1
File Format	PDF
ISSN	01635999
DOI	10.1145/2185395.2185439
Journal	ACM SIGMETRICS Performance Evaluation Review (PERV)
Volume Number	39
Issue Number	4
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2014-01-10
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Hardware and Architecture Software

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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