本文运用数学模型，分析计算出财务净现值最大时的投标方案。
The mathematics model is applied to analyze bidding scheme through calculating finance net present value in this paper.
利用群签名体制给出一个可撤消投标者的安全的网上招投标方案。
This paper utilizes a group signature scheme to propose a secure scheme of bidding and tendering on Internet with revocation of bidder.
从而使其作出一个草率的投标方案，因为它预计在合同被正式授予之前还有改善的机会。
It had therefore put in a somewhat hasty bid that it expected to have a chance to improve before the contract was formally awarded.
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