РАЗРАБОТКА И ИСПОЛЬЗОВАНИЕ ЛОГИЧЕСКОЙ СХЕМЫ ДЛЯ РАСЧЁТА НАДЁЖНОСТИ СИСТЕМ АПК

Проведён анализ моделей процессов, происходящих в сложных системах на объектах АПК. Произведена оценка эффективности и оптимизации сложных систем различного назначения. Обосновано применение в научных исследованиях универсальной имитационной модели, которая может быть адаптирована к любому объекту АПК из указанного класса. Проанализированы различные математические схемы систем автоматического управления и систем массового обслуживания. Предложен подход к составлению логической схемы для оценки надёжности технической системы, на основе которого формируются формулы расчёта вероятности их надёжного функционирования. The analysis of models of processes occurring in complex systems at agricultural facilities is carried out. The efficiency and optimization of complex systems for various purposes are evaluated. The use of a universal simulation model in scientific research, which can be adapted to any object of the agro-industrial complex from the specified class, is justified. Various mathematical schemes of automatic control systems and queuing systems are analyzed. An approach to drawing up a logical scheme for assessing the reliability of a technical system is proposed, on the basis of which formulas for calculating the probability of their reliable functioning are formed.

RANCANG BANGUN PROTOTYPE DISPLAY ANTRIAN PELANGGAN DENGAN PENGGUNAAN TEKS DAN SUARA BERBASIS JARINGAN INTRANET

The development of information technology in various fields, one of which is in the field of queuing systems. That we know about the queuing system which is so tedious because of the long process of queuing. Therefore, the number of customer queues at several banks so that customers cannot relax to carry out transactions at the bank is a problem that is often encountered, as well as what happened at PT. BPR SARIBUMI Bank Godong Branch, which still uses a manual system. To overcome this problem, a queue display is used that uses text and voice displays and prints the queue serial number so that customers no longer need to queue conventionally. With this queuing system, the queue counter clerk, cashier or teller will have no difficulty in determining the first person to be served in the queue. This is a solution, but the display of the queue display uses electronic equipment that performs a counter so that the possibility of damage to the device exists. In making this final project the author uses Microsoft Visual Basic 6.0 software and MySQL database.

AUTOMATED QUEUING SYSTEM ON PERFORMANCE OF SELECTED STATE-OWNED COMMERCIAL ENTITIES IN KENYA: A CONCEPTUAL PAPER

Despite the vital role of automated queuing system on organizational performance from human resource management literature, researchers have paid little attention on state-owned commercial entities and more specifically in Kenya. Studies have revealed controversial findings on the link between automated queuing system and organizational performance thus the need for further studies to bridge the knowledge gaps. The general objective of this study will be to examine the influence of automated queuing system on performance of selected state-owned commercial entities in Kenya. Three specific objectives will be examined. The first objective will be to determine the extent of adoption of automated queuing systems in the selected State-owned entities in Kenya. The second objective will be to establish the influence of automated queuing systems on performance of selected State-owned entities in Kenya. The third objective will be to assess the challenges experienced by selected State-owned entities in Kenya when implementing automated queuing system policies and the fourth objective will be to ascertain ways of mitigating the challenges of implementing automated queuing system policies in State-owned entities in Kenya. This study will be informed by Queue management theory and technology acceptance theory. Exploratory research design will be utilized in this study. Desktop research analysis will be adopted. Published materials including peer-reviewed journals, conference papers, theses and reports relevant with the topic of the current study will be reviewed. Findings, conclusions and recommendations of this study will be derived from findings of previous empirical studies. Recommendations will be made in accordance with recommended protocols and guidelines of statistical literature. Further research will be recommended in other areas using different methodologies to facilitate collaboration of the results.

COMPARISON OF TWO FORMS OF ERLANGIAN DISTRIBUTION LAW IN QUEUING THEORY

Context. For modeling various data transmission systems, queuing systems G/G/1 are in demand, this is especially important because there is no final solution for them in the general case. The problem of the derivation in closed form of the solution for the average waiting time in the queue for ordinary system with erlangian input distributions of the second order and for the same system with shifted to the right distributions is considered. Objective. Obtaining a solution for the main system characteristic – the average waiting time for queue requirements for three types of queuing systems of type G/G/1 with usual and shifted erlangian input distributions. Method. To solve this problem, we used the classical method of spectral decomposition of the solution of Lindley integral equation, which allows one to obtain a solution for average the waiting time for systems under consideration in a closed form. For the practical application of the results obtained, the well-known method of moments of the theory of probability was used. Results. For the first time, spectral expansions of the solution of the Lindley integral equation for systems with ordinary and shifted Erlang distributions are obtained, with the help of which the calculation formulas for the average waiting time in the queue for the above systems in closed form are derived. Conclusions. The difference between the usual and normalized distribution is that the normalized distribution has a mathematical expectation independent of the order of the distribution k, therefore, the normalized and normal Erlang distributions differ in numerical characteristics. The introduction of the time shift parameter in the laws of input flow distribution and service time for the systems under consideration turns them into systems with a delay with a shorter waiting time. This is because the time shift operation reduces the coefficient of variation in the intervals between the receipts of the requirements and their service time, and as is known from queuing theory, the average wait time of requirements is related to these coefficients of variation by a quadratic dependence. The system with usual erlangian input distributions of the second order is applicable only at a certain point value of the coefficients of variation of the intervals between the receipts of the requirements and their service time. The same system with shifted distributions allows us to operate with interval values of coefficients of variations, which expands the scope of these systems. This approach allows us to calculate the average delay for these systems in mathematical packages for a wide range of traffic parameters.

Towards the analysis of the performance measures of heterogeneous networks by means of two-phase queuing systems

Due to a multistage nature of transmission processes in heterogeneous 4G, 5G mobile networks, multiphase queuing systems become one of the most suitable ways for the resource allocation algorithms analysis and network investigation. In this paper, a few scientific papers that approached heterogeneous networks modelling by means of multiphase queuing systems are reviewed, mentioning the difficulties that arise with this type of analytical analysis. Moreover, several previously investigated models are introduced briefly as an example of two-phase systems of finite capacity and a special structure in discrete time that can be used for analysing resource allocation schemes based on the main performance measures obtained for wireless heterogeneous networks. One of the model presents a two-phase tandem queue with a group arrival flow of requests and a second phase of the complex structure that consists of parallel finite queues. The second model is a two-phase tandem queue with Markov modulated geometric arrival and service processes at the first phase and exhaustive service process at the second phase, which solves a cross-layer adaption problem in a heterogeneous network.