The utility cost function is considered, which includes the increase of trip expense and trip time, reduction of comfort and decrease of convenience during the transfer.
该效用损失函数充分考虑了居民换乘导致出行时间和费用的增加以及舒适性和方便性的损失。
But in the fierce market competition, enterprises usually cannot determine the price of their products. The only way to increase the profit is to decrease the cost and expense.
而在激烈的市场竞争中，产品的价格往往不能由企业自身来决定，因此，提高产品利润的途径只能是尽量的压缩成本，控制成本支出。
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