The key of production planning of refineries is to determine the production planning of units and blending schemes of blends in each period of the plan horizon,since they affect the effective utilization of components...The key of production planning of refineries is to determine the production planning of units and blending schemes of blends in each period of the plan horizon,since they affect the effective utilization of components of refineries and hence profits.The optimization is difficult,because of many complicated product production–consumption relationships in production processes,which are closely related to the running modes of the units.Additionally,the blending products,such as gasoline and diesel,may use multiple blending schemes for their production that increase the complexity of the problem.This paper models the production planning problem as a mixed integer nonlinear programming.Computational experiments for a refinery show the effectiveness of the model.The optimal results give the effective utilization of the self-produced components and increase of the profit.展开更多
The agricultural comprehensive development project performance evaluation refers to the evaluation and assessment of the expected target original and effectiveness after the completion of a project, discuss how to acc...The agricultural comprehensive development project performance evaluation refers to the evaluation and assessment of the expected target original and effectiveness after the completion of a project, discuss how to according to different projects to form a reasonable evaluation system for agricultural comprehensive development project, make a reasonable assessment, which can not only ensure the project quality, but also to achieve the project plans to further improve and perfect, make agricultural development operation became more efficient, so it has the practical significance. This paper describes the construction of the performance evaluation system of agricultural comprehensive development project problems, and puts forward some countermeasures for construction of agricultural comprehensive development project performance evaluation system.展开更多
基金Supported by the State Key Laboratory of Synthetical Automation for Process Industries Fundamental Research Funds(2013ZCX02)
文摘The key of production planning of refineries is to determine the production planning of units and blending schemes of blends in each period of the plan horizon,since they affect the effective utilization of components of refineries and hence profits.The optimization is difficult,because of many complicated product production–consumption relationships in production processes,which are closely related to the running modes of the units.Additionally,the blending products,such as gasoline and diesel,may use multiple blending schemes for their production that increase the complexity of the problem.This paper models the production planning problem as a mixed integer nonlinear programming.Computational experiments for a refinery show the effectiveness of the model.The optimal results give the effective utilization of the self-produced components and increase of the profit.
文摘The agricultural comprehensive development project performance evaluation refers to the evaluation and assessment of the expected target original and effectiveness after the completion of a project, discuss how to according to different projects to form a reasonable evaluation system for agricultural comprehensive development project, make a reasonable assessment, which can not only ensure the project quality, but also to achieve the project plans to further improve and perfect, make agricultural development operation became more efficient, so it has the practical significance. This paper describes the construction of the performance evaluation system of agricultural comprehensive development project problems, and puts forward some countermeasures for construction of agricultural comprehensive development project performance evaluation system.