OPTIMIZATION OF MARKOVIAN QUEUING SYSTEMS WITH FAILURES IN THE MATLAB SYSTEM

2018 ◽  
pp. 112-120
Author(s):  
Viktor Afonin ◽  
Vladimir Valer'evich Nikulin
Keyword(s):  
Work Load ◽  
Queuing System ◽  
System Throughput ◽  
Queuing Systems ◽  
Operational Conditions ◽  
Optimization Task ◽  
Test Models ◽  
Heavy Work Load ◽  
Minimum Number ◽  
Poisson Arrivals

The paper touches upon the optimization task of the multichannel Markov queuing system suffering failures due to a heavy work load, which can be observed in realistic operational conditions for multi-purpose queuing systems. The optimization task is reduced to maximizing the system throughput with the minimum number of maintenance devices required, hence, to reducing the number of failures. To solve the task, MATLAB R2016b system has been used, which provides tools (functions) for minimizing the objective functions of many variables with constraints. The natural constraints are superimposed on the system parameters: intensity of the input flow and intensity of the service, which are positive quantities in the queuing system environment. Taking into account the fact that possibility of failures depends on the number of servicing tools, this number inevitably becomes a real number, and not a whole number, and should be taken as a parameter of the optimization task. The results obtained can be used to test models of queuing systems having failures under peak loads, as well as in cases which can be defined by the ratio of the intensity of Poisson arrivals to the intensity of a single machine processing.

An alternative transient solution for semi-Markov queuing systems

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Revaz Kakubava
Keyword(s):  
Queuing System ◽  
Queuing Systems ◽  
Transient Solution ◽  
Methods Of Analysis ◽  
Supplementary Variables ◽  
Probabilistic Argumentation

AbstractBy using a purely probabilistic argumentation, two theorems are proved. They simplify the existing methods of analysis for the {M/G/1} queuing system by means of the supplementary variables method.

Some Attendance Patterns Exhibited by Members of Parliament during the 28th Parliament

1972 ◽  
Vol 5 (1) ◽  
pp. 135-141
Author(s):  
Dorothy Byrne
Keyword(s):  
Work Load ◽  
Committee Work ◽  
Members Of Parliament ◽  
Attendance Patterns ◽  
Heavy Work Load ◽  
Heavy Work

It can be said that in the Liberal back bench there are 20 members, or 16.4 per cent of the total doing 36.8 per cent of the committee work. Similarly, 27.1 per cent of the members are doing 52.8 per cent of the committee work. One of the major complaints of government members is the extremely heavy work load which has been aggravated by the recent changes in the rules and procedures of the House. Indeed, if one is listening to the complaints of a member who is in this 27.1 per cent group, his complaints are justified and real. One must conclude that the remaining 53.2 per cent who are responsible for only 25.4 per cent of the committee work must be the victims of work from another source.

scholarly journals Inference Using Simulated Neural Moments

Econometrics ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 35
Author(s):  
Michael Creel
Keyword(s):  
Neural Network ◽  
Confidence Intervals ◽  
Bayesian Methods ◽  
Jump Diffusion ◽  
Nominal Level ◽  
Method Of Simulated Moments ◽  
Mcmc Estimation ◽  
Test Models ◽  
Minimum Number ◽  
Jump Diffusion Model

This paper studies method of simulated moments (MSM) estimators that are implemented using Bayesian methods, specifically Markov chain Monte Carlo (MCMC). Motivation and theory for the methods is provided by Chernozhukov and Hong (2003). The paper shows, experimentally, that confidence intervals using these methods may have coverage which is far from the nominal level, a result which has parallels in the literature that studies overidentified GMM estimators. A neural network may be used to reduce the dimension of an initial set of moments to the minimum number that maintains identification, as in Creel (2017). When MSM-MCMC estimation and inference is based on such moments, and using a continuously updating criteria function, confidence intervals have statistically correct coverage in all cases studied. The methods are illustrated by application to several test models, including a small DSGE model, and to a jump-diffusion model for returns of the S&P 500 index.

scholarly journals Improving Queuing System Throughput Using Distributed Mean Value Analysis to Control Network Congestion

2015 ◽  
Vol 07 (01) ◽  
pp. 21-29 ◽  
Author(s):  
Faisal Shahzad ◽  
Muhammad Faheem Mushtaq ◽  
Saleem Ullah ◽  
M. Abubakar Siddique ◽  
Shahzada Khurram ◽  
...  
Keyword(s):  
Mean Value ◽  
Queuing System ◽  
System Throughput ◽  
Control Network ◽  
Network Congestion ◽  
Value Analysis ◽  
Mean Value Analysis

A New Clustering Method with Fuzzy Approach Based on Takagi-Sugeno Model in Queuing Systems

2013 ◽  
Vol 3 (2) ◽  
pp. 32-54
Author(s):  
Farzaneh Gholami Zanjanbar ◽  
Inci Sentarli
Keyword(s):  
Fuzzy Model ◽  
Extraction Process ◽  
Queuing System ◽  
Rule Base ◽  
Queuing Systems ◽  
Clustering Method ◽  
Hard Clustering ◽  
Sugeno Model ◽  
Takagi Sugeno ◽  
Linear Controllers

In this paper, the authors propose a new hard clustering method to provide objective knowledge on field of fuzzy queuing system. In this method, locally linear controllers are extracted and translated into the first-order Takagi-Sugeno rule base fuzzy model. In this extraction process, the region of fuzzy subspaces of available inputs corresponding to different implications is used to obtain the clusters of outputs of the queuing system. Then, the multiple regression functions associated with these separate clusters are used to interpret the performance of queuing systems. An application of the method also is presented and the performance of the queuing system is discussed.

Constraints faced by animal husbandry officials in the implementation of integrated murrah development scheme (IMDS) in Haryana Sta

2017 ◽  
Author(s):  
Y. S. Jadoun ◽  
Y. S. Jha ◽  
Pragya Bhaduria ◽  
Rohit Gupta ◽  
Ruchi Singh
Keyword(s):  
Animal Husbandry ◽  
Work Load ◽  
Technical Expertise ◽  
Large Area ◽  
Dairy Farmers ◽  
Development Scheme ◽  
Heavy Work Load ◽  
Heavy Work ◽  
Operational Constraints ◽  
Ranking Technique

A study has been conducted in Haryana to analyze the various constraints faced by animal husbandry officials in implementation of “Integrated Murrah Development Scheme” (IMDS). Data were collected from 40 animal husbandry officials from four districts namely Kurukshetra, Mahendragarh, Bhiwani and Jhajjar. Garett’s ranking technique was used to prioritize the different sets of constraints. “Heavy work-load due to multidimensional activities of the project during peak season” and “Inadequacy of staff in the scheme” were the major administrative constraints in order of severity. Under technical constraints “lack of mass media approach” followed by “No provision for the refresher courses for the programme functionaries” were the most severe. “Inadequate number of staff at field level and large area of operation under a single supervisor” followed by “lack of involvement of NGO and PRIs in enhancing community participation” were important infrastructural and operational constraints. Untimely release of fund by the parent department and misguidance of farmers by the middlemen/ Brokers were the economic and socio-psychological constraints, respectively. Lack of technical expertise in the field of extension, lack of emphasis on educating the dairy farmers were other important miscellaneous constraints faced by animal husbandry officials. Removal of these constraints should receive priority over the considerable focus on the implementation of such scheme.

Stress, Social Support, and Health in Married Professional Women with Small Children

1991 ◽  
Vol 15 (3) ◽  
pp. 431-445 ◽  
Author(s):  
Alan Reifman ◽  
Monica Biernat ◽  
Eric L. Lang
Keyword(s):  
Social Support ◽  
Depressive Symptoms ◽  
Role Conflict ◽  
Sex Discrimination ◽  
Work Load ◽  
Professional Women ◽  
Small Children ◽  
Stress Buffering ◽  
Heavy Work Load ◽  
Heavy Work

Two hundred married professional women with small children were surveyed to investigate what types of occupational and role-conflict stresses are associated with physical and depressive symptoms, and whether social support could protect individuals from the negative health effects of stress. Six stress indices predicted physical and depressive symptoms, both concurrently and 1 year later. These stresses reflected perceptions of lack of authority and influence on the job, sex discrimination, a heavy work load, work imposing on relaxation, family imposing on relaxation, and overall suffering from role conflict. Social support yielded no stress-buffering effects.

Vulcameter Determination of Best Cure

1965 ◽  
Vol 38 (4) ◽  
pp. 757-768 ◽  
Author(s):  
S. D. Gehman ◽  
F. S. Maxey ◽  
S. R. Ogilby
Keyword(s):  
Rate Constant ◽  
Work Load ◽  
Service Performance ◽  
Stress Strain ◽  
First Order ◽  
Testing Laboratories ◽  
Physical Testing ◽  
Strain Testing ◽  
Minimum Number

Abstract Using a continuous cure curve to select a minimum number of stepped cures, it should be possible to vulcanize and test fewer sheets to determine best cure. This procedure is attractive for its potential of expediting the output of physical testing laboratories and especially for reducing the work load of stress-strain testing. Cure curves recorded with the Vulcameter approximated first-order reactions. Equations were derived to calculate the final force and rate constant from recorded force values without carrying the reaction to completion. A chart is suggested to assist in calculating the rate constant. Time for a given fractional rise in force depends only on the rate constant so that a chart for obtaining it is relatively simple. Experience and correlation with service performance in selecting best cures is emphasized. 95% rise times from Vulcameter curves were compared with conventionally selected best cures for a wide variety of compounds. Indications are that experience with the method might reduce the number of test-sheet cures to determine optimum stress-strain properties to one, two, or three depending upon the compound and the exactness required.

scholarly journals The Efficacy of School Inspection and the Quality Teaching-Learning of Students in Lower Secondary Schools in Uganda

2020 ◽  
Vol 7 (3) ◽  
pp. 303-311
Author(s):  
John Busingye
Keyword(s):  
Secondary Schools ◽  
Geographical Location ◽  
Weather Conditions ◽  
Work Load ◽  
Quality Teaching ◽  
School Inspection ◽  
Heavy Work Load ◽  
Bad Weather ◽  
Teaching Learning ◽  
Lower Secondary Schools

The study evaluated the efficacy of school Inspection upon quality teaching/learning in lower secondary Schools. The study targeted a population of 280 participants selected from twenty (20) schools with a sample size of 203 participants that was investigated. Questionnaires were the main data collection tool used.  The study findings show that the geographical location of some schools, lack of enough finances to carry out inspection, bad weather conditions, heavy work load of duties by district inspector of schools and education officers. The study concluded that district education officers and inspector of schools were vital in the teaching learning processes. The study commends that there is need for excellent working relationship between the inspection team and classroom teachers through formal meetings to high light on the progress and challenges related to teaching/learning outcomes. The study further commends government to increase the budget allocated to  lower secondary school inspection so as to inspire the inspection activities to be carried out as planned in the education sector.

scholarly journals Computer Supported Collaborative LANGUAGE Learning (CSCLL)

2010 ◽  
Vol 16 ◽  
pp. 31
Author(s):  
Min Jung Jee
Keyword(s):  
Language Learning ◽  
Personal Responsibility ◽  
Work Load ◽  
Computer Supported Collaborative Learning ◽  
Classroom Implementation ◽  
Specific Description ◽  
Heavy Work Load ◽  
Potential Applicability ◽  
Heavy Work ◽  
Collaborative Language

<p>As the title suggests, the concept of Computer-Supported Collaborative Language Learning (CSCLL) adopts and shares many aspects of Computer-Supported Collaborative Learning (CSCL). This article is an attempt to incorporate CSCL in English as a Second Language (ESL) and English as a Foreign Language (EFL) contexts, and to examine the potential applicability of CSCL in ESL and EFL classes. The goal of this article is to examine potential effects of CSCL in ESL and EFL. To validate its usefulness, the theoretical framework of CSCL and the effects of collaboration in language learning are introduced. With guidelines for task design, a sample of CSCLL is presented. The specific description of the sample is designed to enhance the ESL and EFL teachers' understanding and to motivate them to use CSCLL in their teaching contexts. Practical tips for classroom implementation will be also included. In addition, potential benefits and limitations are discussed. Among these are increased authenticity, eliciting students' active participation and interaction, flexibility, reduced anxiety and higher motivation, scaffolding and collaboration, learnercenteredness, developing electronic literacy and promoting ownership and personal responsibility by webpublishing. Affordability, practicality and heavy work-load for the teachers can be considered as potential limitations. Finally, pedagogical implications for teachers and researchers are suggested.</p>

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