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期望值(EV)是衡量某一经济矿床折现到勘探开始时的平均价值或净值的尺度。这概念可用于评价分期钻探(progressive drilling)对勘探经济效果的影响,以便实现逐次钻探投资(sequential drilling
The expected value (EV) is a measure of the average value or net worth of an economic deposit discounted to the start of an exploration. This concept can be used to evaluate the impact of progressive drilling on the economics of exploration in order to achieve sequential drilling