分析了效用函数理论，提出了图书效用函数，并分析其性质。

According to utility function theory, the paper point out the utility function of library and analyse it's character.

youdao

分析了效用函数理论，提出了图书效用函数，并分析其性质。

According to utility function theory, the paper point out the utility function of library and analyse it's character.

youdao