The paper is devoted to the development of a genetic algorithm for finding the optimal values of control parameters of the ethylene oligomerization process. The formulation of the problem of optimal control of the eth...
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The paper formulates an algorithm for searching the optimal temperature regime of the catalytic process in an ideal mixing reactor. The problem of optimal control of the catalytic process is formulated in a general fo...
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The paper is devoted to the development of a genetic algorithm for finding the optimal values of control parameters of the ethylene oligomerization process. The formulation of the problem of optimal control of the eth...
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ISBN:
(数字)9798350349818
ISBN:
(纸本)9798350349825
The paper is devoted to the development of a genetic algorithm for finding the optimal values of control parameters of the ethylene oligomerization process. The formulation of the problem of optimal control of the ethylene oligomerization process is given. The control parameters are temperature and reaction duration, the values of which are subject to constraints. It is proposed to search for the solution of the formulated problems using a genetic algorithm with real coding. The principle of operation of genetic algorithms is based on the imitation of the processes of evolution of living nature. It includes cyclic application of selection, crossing, mutation and renewal operations to a population of individuals. For each of the problems under consideration the method of representation of the mathematical analog of the population, on the basis of which the solution is searched, is described. A step-by-step genetic algorithm for solving the formulated optimal control problems is given. A computational experiment is carried out, as a result of which the optimal reaction temperature and process duration, at which the target functional takes the largest value, are calculated.
In response to the growing imperative of addressing environmental concerns and aligning with governmental regulations in supply chain management, this study navigates the optimization landscape of closed-loop supply c...
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The paper formulates an algorithm for searching the optimal temperature regime of the catalytic process in an ideal mixing reactor. The problem of optimal control of the catalytic process is formulated in a general fo...
The paper formulates an algorithm for searching the optimal temperature regime of the catalytic process in an ideal mixing reactor. The problem of optimal control of the catalytic process is formulated in a general form. To find its numerical solution, an algorithm based on the method of differential evolution is described. The algorithm allows to obtain an approximate solution of the optimization problem in a time acceptable from the practical point of view. A computational experiment for the dimerization process of alphamethylstyrene is carried out. The optimal temperature profile for achieving the maximum yield of reaction products – linear dimers – is obtained.
The paper considers a mathematical model of bubble migration in oil emulsion taking into account hydrate formation. The relevance of the problem is related to the extension of the theory describing various options of ...
The paper considers a mathematical model of bubble migration in oil emulsion taking into account hydrate formation. The relevance of the problem is related to the extension of the theory describing various options of oil and gas spills that occur during deep-water hydrocarbon extraction at the bottom of the world ocean. The intensity of hydrate formation has been estimated for the case of joint migration of oil droplets and gas bubbles and migration of bubbles in an oil emulsion. Dependencies of mass of hydrate formed, jet temperature and radii of gas and hydrate components for two limiting cases are obtained.
In connection with the decreasing hydrocarbon reserves on land, the interest of researchers in new alternative methods of hydrocarbon production is growing. One of the actively developing areas is the production of hy...
In connection with the decreasing hydrocarbon reserves on land, the interest of researchers in new alternative methods of hydrocarbon production is growing. One of the actively developing areas is the production of hydrocarbons from deep-water deposits, in connection with which the share of developed deposits in the water area of the World Ocean is growing every year. However, this production method is not completely safe, since any damage to the production structure can lead to leakage of hydrocarbons. In this case, hydrocarbons are distributed in the form of a submerged jet. Predicting the behavior of submerged jets, calculating their trajectories and thermophysical parameters is important in the elimination of leakage. The article discusses an experimental study of a submerged jet. The results of the experiment will make it possible to verify the mathematical model describing the propagation of a submerged jet. The experiment was carried out to study the trajectory of the jet and its temperature. This paper presents the results on the analysis of the jet trajectory. In the experiment, gasoline or diesel fuel was used as a liquid, air was used as a gas. The work shows a diagram of the experimental setup, describes the process of the experiment, and also shows a photograph of the experiment and a comparison with the results of calculations.
The paper considers a mathematical model of the spread of a multiphase submerged jet, the flow of which is associated with a well damage during the development of a field or pipeline during oil transport. The jet cons...
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Due to possible hydrocarbon leaks that can occur when a well is damaged during deep-sea offshore oil production, it is important to study methods for eliminating leaks. The article deals with the mathematical model of...
Due to possible hydrocarbon leaks that can occur when a well is damaged during deep-sea offshore oil production, it is important to study methods for eliminating leaks. The article deals with the mathematical model of the device "dome-separator", which is used to eliminate deep-water leaks. The article also discusses the possibility of using and advantages of such a device. The paper presents a scheme of the device, a mathematical model that contains the basic equations. In the process of the computational experiments, the thermophysical characteristics of hydrocarbons accumulated inside the dome were determined, and the process of accumulation of hydrocarbons inside the dome was modeled.
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