qp_cs.cs.

/ *版权所有2021，gurobi优狗万app足彩化，llc * // *此示例制定和解决以下简单QP模型：最小化x ^ 2 + x * y + y ^ 2 + y * z + z ^ 2 + 2 x受x的影响+ 2 y + 3 z> = 4 x + y> = 1 x，y，z非负，它解决了一旦作为连续模型，并且作为整数模型。* /使用系统;使用gurobi;class qp_cs {static void main（）{try {grbenv env = new grbenv（“qp.log”）;grbmodel模型=新grbmodel（env）;//创建变量grbvar x = model.addvar（0.0，1.0,0.0，grb.continuous，“x”）;grbvar y = model.addvar（0.0，1.0,0.0，grb.continuous，“Y”）;grbvar z = model.addvar（0.0，1.0,0.0，grb.Contion，“Z”）;//设置目标GRBQUADEXPR obj = x * x + x * y + y * y + y * z + z * z + 2 * x; model.SetObjective(obj); // Add constraint: x + 2 y + 3 z >= 4 model.AddConstr(x + 2 * y + 3 * z >= 4.0, "c0"); // Add constraint: x + y >= 1 model.AddConstr(x + y >= 1.0, "c1"); // Optimize model model.Optimize(); Console.WriteLine(x.VarName + " " + x.X); Console.WriteLine(y.VarName + " " + y.X); Console.WriteLine(z.VarName + " " + z.X); Console.WriteLine("Obj: " + model.ObjVal + " " + obj.Value); // Change variable types to integer x.VType = GRB.INTEGER; y.VType = GRB.INTEGER; z.VType = GRB.INTEGER; // Optimize model model.Optimize(); Console.WriteLine(x.VarName + " " + x.X); Console.WriteLine(y.VarName + " " + y.X); Console.WriteLine(z.VarName + " " + z.X); Console.WriteLine("Obj: " + model.ObjVal + " " + obj.Value); // Dispose of model and env model.Dispose(); env.Dispose(); } catch (GRBException e) { Console.WriteLine("Error code: " + e.ErrorCode + ". " + e.Message); } } }