The standard of the optimum portfolio is to make the mathematics expectation of the profit to be maximum in the scope of given risk level.
最优的标准是在一定的风险范围内使收益的数学期望达到最大。
The author also considered the optimum portfolio selection problem with risk-free assets and gave a instance to show how to solve the problem.
进而，本文考察了加入无风险资产后的最优组合问题，并给出了一个例子的求解。
Are the projects prioritized to balance risk against optimum value to the portfolio?
项目是否按照平衡风险和最优价值的原则来评定优先级？
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