净现值法是在资本预算最为重要的一种方法，它需要的一个重要输入变量是项目的必要收益率。
NPV is the most important method in capital budgeting, an important input variable it needs is the hurdle rate of a project.
本章在研究了风险投资的含义和基本特点的基础上，介绍了传统的投资决策方法即净现值法和内部收益率法的基本原理。
This chapter introduced traditional investment decision method, such as net present value and inters return rate on the base of function and character about venture capital.
以净现值法为基础，应用蒙特卡罗原理，提出了在石油产量和市场油价随机变动条件下石油勘探项目实物期权应用模型中不同阶段的波动率参数估算方法。
On the basis of traditional net present value method and Monte Carlo theory, a method for calculating the stage volatilities in the petroleum real option model was given.
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