我想用这样的离散值求解非线性多变量方程:
10 < x < 100
有约束:
// 1. Create a Solver
Solver solver = new Solver("my first problem");
// 2. Create variables through the variable factory
IntVar x = VariableFactory.bounded("X", 0, 5, solver);
IntVar y = VariableFactory.bounded("Y", 0, 5, solver);
// 3. Create and post constraints by using constraint factories
solver.post(IntConstraintFactory.arithm(x, "+", y, "<", 5));
// 4. Define the search strategy
solver.set(IntStrategyFactory.lexico_LB(x, y));
// 5. Launch the resolution process
solver.findSolution();
//6. Print search statistics
Chatterbox.printStatistics(solver);
等。
我正在尝试使用Choco库,但我有点失落。 我找到了这段代码:
:before
但我不明白我在哪里放置方程式。
答案 0 :(得分:2)
之前我没有使用过这个库,但也许您应该简单地将等式视为约束?
答案 1 :(得分:1)
是的,更确切地说,你应该将方程式分解为几个约束条件:
10 < x < 100
成为
solver.post(ICF.arithm(x,">",10));
solver.post(ICF.arithm(x,"<",100));
和
x*y + z + t - 10 = 0
变为
// x*y = a
IntVar a = VF.bounded("x*y",-25,25,solver);
solver.post(ICF.times(x,y,a);
// a+z+t=10
IntVar cst = VF.fixed(10,solver);
solver.post(ICF.sum(new IntVar[]{a,z,t},cst));
最佳,
联系我们以获取有关Choco Solver的更多支持:www.cosling.com