A Study On Production Decision Of Facility Agriculture Based On Greedy Algorithm

With the rapid development of science and technology and the widely use of high-tech in agricultural production,agricultural facilities has become the creative industries of agriculture.With the rapid development of agricultural facilities,a large number of facility agricultural production units have set up across the country,and have made good achievements.But the facility agricultural production units lack of scientific on production and management,outstanding performance is the blindness and randomness in the production decisions.This outstanding problem will seriously restrict the development of facility agricultural production units.Therefore,the research of production decision on facility agricultural production units has important significance.In the first chapter,it analyzes the background and significance of the research,and summarizes the research status both domestic and overseas.Then it determines the research directions,contents and methods according to the targeted questions.Finally,it presents the possible innovations and deficiencies.In the second chapter,it summarizes the concepts of facility agriculture,risk,agricultural risk,etc.In the meantime,it introduces the theories related to value at risk and greedy algorithm,which are required in the research.Furthermore,it compares greedy algorithm with other combinatorial optimization methods.Considering the characteristics of the problem studied in this paper,apparently it draws the conclusion that the greedy algorithm has the superiority in studying production decisions of facility agricultural production units,which acts as the cornerstone of theories for the later empirical study.The third chapter mainly analyzes the current status of facility agriculture from such three aspects as development achievements,opportunities and problems of production decisions,which lays solid reality foundation for further research.In the forth chapter,the model of production decision on facility agriculture has been established,which is solved by greedy algorithm.The objective function is sales profit,constraints include crop rotation,land resource utilization,etc.Finally,an example to verify the feasibility and scientific model has been used.The fifth chapter is the study of production decision on facility agriculture under risk control.First,an estimation model of price risk has been selected,the GARCH model and VaR model.According to the analysis of the data,risk values of 12 kinds of vegetables have been calculated.Furthermore,the risk constraint is added to the production decision model,and the results of the two models have been compared.The fifth chapter proposes the countermeasures and suggestions for scientific production of facility agricultural production units,which are based on the problems and opportunities of production decisions of facility agricultural production units.