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3 ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes

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About one problem of optimal stochastic control of the modes of operation of water mains

100%

Tevyashev A. , Matviyenko O.

tom Vol. 4, No 3

3--12

The problem of increasing of the efficiency of operation of the water mains in modern conditions while the transition to a three-tier tariff for the electricity is examined in the present work. An effective method for solving this problem, based on the use of specific features of the water mains as stochastic objects operating in the stochastic environment is offered. The mathematical formulation of the problems of optimal stochastic control of the modes of operation of the water main with probabilistic constraints on the phase variables is presented. A new strategy for the optimal stochastic control of the modes of operation of the water main, the use of which has allowed to develop an effective method for solving the examined problem is proposed in the present work. It is shown that the transition from the classical deterministic problems of control of the modes of operation of the water mains to stochastic ones, provides a significant (up 9%) decrease of financial expenses for the electricity.

Geoinformational Analytic Control System of the Collection of Municipal Solid Waste

80%

Tevyashev A. , Matviienko O. , Shiyan O.

2014

tom Vol. 3, No 3

77--87

One of the effective approaches to solve the problem of optimal control of the collection of municipal solid waste in cities and towns on the basis of geoinformational analytic system is studied in the present work. Its structure is shown in the form of three interconnected subsystems: geoinformational system, analytic system, subsystem of monitoring of the refuse collection vehicles. The main attention is focused on the analytic subsystem. The mathematical formulation of the problem of effective planning of the traffic routes of the refuse collection vehicles and efficient algorithm to solve it are set here. The control of implementation of the planned routes is carried out by the subsystem of monitoring of the refuse collection vehicles using GPS-navigation.

The stochastic model of quasi-stationary non-isothermal mode of transport and distribution of natural gas in the gas transportation systems

80%

Tevyashev A. , Mamedova A. , Iievlieva S. , Frolov V.

tom Vol. 6, No 4

121--133

The paper presents a stochastic model of a quasi-stationary non-isothermal mode of transport and distribution of natural gas in gas transportation systems with multilinear linear sections of pipeline and a lot of craft compressor stations. A method for calculating the statistical properties of the dependent variables of the model from the statistical properties of the independent variables.