The objective function, the expected daily profit defined as the ticket revenue minus the operating and customer waiting costs, is discontinuous at changes in the bus frequency. 目標函數是期望日利潤,定義為票價(jià)收入減營(yíng)運及乘客等候成本,然而,目標函數是不連續的且斷點(diǎn)發(fā)生在發(fā)車(chē)頻率改變處。