定义问题: 在不考虑食品成本的情况下,如何选择不同的食品,以最大化摄入的营养价值?
对问题进行编码: 使用线性规划模型和Python中的PuLP库来编码这个问题。
编写代码: 假设有四种食品,并且每一种食品都有不同的营养价值(以每百克为单位),如下所示:
食品 | 蛋白质(克) | 脂肪(克) | 碳水化合物(克) |
---|---|---|---|
牛肉 | 26 | 20 | 0 |
鸡肉 | 24 | 10 | 10 |
米饭 | 3 | 1 | 30 |
面包 | 5 | 3 | 30 |
接下来,我们将定义我们的线性规划问题:
from pulp import *
problem = LpProblem("Maximize Nutrition", LpMaximize)
beef = LpVariable("beef", 0, None, LpContinuous) chicken = LpVariable("chicken", 0, None, LpContinuous) rice = LpVariable("rice", 0, None, LpContinuous) bread = LpVariable("bread", 0, None, LpContinuous)
problem += 26beef + 24chicken + 3rice + 5bread, "Protein"
problem += 20beef + 10chicken + rice + 3bread <= 150, "Fat" problem += beef + chicken + rice + bread <= 150, "Cost" problem += 0beef + 10chicken + 30rice + 30*bread <= 150, "Carbs"
problem.solve()
print("Solution:") for var in problem.variables(): print(var.name, "=", var.varValue)
print("Total Nutrition = ",