最佳投资问题加引言

AbstractThe following article will give some discussion about the optimal investment problemdistribution.According to the conditions given in the first question,there are four kinds ofinvestment methods known as Project A,B,C and D.In order to solve the problem of themaximum amount of principal and interest at the end of the fifth year,we calculated thefollowing conclusions:The investment of items B,C and D is 300000(the beginning of thefirst year to the beginning of the fourth year),800000(the beginning of the third year),andthe million is yuan (the beginning of the second year),when other funds are invested inproject a at the beginning of each year,the retum at the end of the fifth year is the largest.According to the condition of the problem,the mathematical model is established andthe maximum amount of capital and profit can be obtained.This problem can also besolved using the Lingo Algorithm.The second problem according to the conditions givenin the title,add a restricted condition risk index and in the end of the first year the capitaland interest amount is not less than 3.2 million yuan to find the minimum risk index.Inorder to solve the minimum risk index problem at the end of the fifth year,it is calculatedthat the 2000000 funds invested in project a at the end of the fifth year are at the minimumrisk index.According to the condition of the problem,the mathematical model is establishedand the minimum risk index is obtained.This problem can also be solved using the LingoAlgorithm.The third question according to the condition which the topic gives,increases a0 risk investment way (the topic does not give the deposit bank the Specific Risk Index,defaults to 0),and find the minimum value of the risk index when the principal and interestamount reaches 3200000 yuan at the end of the fifth year.According to the condition ofthe problem,the mathematical model is established and the minimum risk index isobtained.Keywords:capital interest amount,optimal solution,mathematical model,LingoAlgorithm