尽管默认情况下枚举被存储为整数，但您可以指定要使用的整型基类型。
While enumerations are stored as integers by default, you can specify the integral base type to use.
将指定基的数字的字符串表示形式转换为等效的64位无符号整数。
Converts the value of the specified double-precision floating-point number to an equivalent 64-bit unsigned integer.
静态规划建立了混合整数规划模型， 利用基于线性规划换基运算的支路交换法有效地求解该模型。
The static planning constructs the mixed integer programming model . A branch exchange technique based on the change base of linear programming solves the model effectively.
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