可以把CPLEX代码写出来吗

以下是该问题的 CPLEX 代码示例：

import cplex
from cplex.exceptions import CplexError

# 设置问题参数
n = 5  # 城市数量
m = 3  # 设施数量
d = [100, 150, 200, 120, 180]  # 每个城市的废旧产品总量
q = [150, 200, 250]  # 每个设施的处理能力
c = [[10, 20, 30], [15, 25, 35], [20, 30, 40], [18, 28, 38], [25, 35, 45]]  # 运输成本
f = [500, 700, 900]  # 设施固定成本

# 创建求解器实例
problem = cplex.Cplex()

# 添加变量
var_names = []
for i in range(n):
    for j in range(m):
        var_names.append("x_%d_%d" % (i, j))
problem.variables.add(names=var_names, types=[problem.variables.type.integer]*n*m)

var_names = []
for j in range(m):
    var_names.append("y_%d" % j)
problem.variables.add(names=var_names, types=[problem.variables.type.binary]*m)

# 添加目标函数
problem.objective.set_sense(problem.objective.sense.minimize)
obj_coeffs = [c[i][j] for i in range(n) for j in range(m)]
obj_coeffs += f
problem.objective.set_linear(zip(range(n*m+m), obj_coeffs))

# 添加约束条件
for i in range(n):
    constraint = cplex.SparsePair()
    for j in range(m):
        constraint.add(ind=["x_%d_%d" % (i, j)], val=[1])
    problem.linear_constraints.add(lin_expr=[constraint], senses=["L"], rhs=[d[i]])

for j in range(m):
    constraint = cplex.SparsePair()
    for i in range(n):
        constraint.add(ind=["x_%d_%d" % (i, j)], val=[1])
    constraint.add(ind=["y_%d" % j], val=[-q[j]])
    problem.linear_constraints.add(lin_expr=[constraint], senses=["L"], rhs=[0])

# 求解问题
problem.solve()

# 输出结果
print("Solution status: %s" % problem.solution.get_status_string())
print("Objective value: %.2f" % problem.solution.get_objective_value())
for i in range(n):
    for j in range(m):
        var_value = problem.solution.get_values("x_%d_%d" % (i, j))
        if var_value > 0:
            print("x_%d_%d: %d" % (i, j, var_value))
for j in range(m):
    var_value = problem.solution.get_values("y_%d" % j)
    if var_value > 0:
        print("y_%d: %d" % (j, var_value))

注意，上述代码是一个示例，其中的参数和约束条件需要根据具体的问题进行调整。