企业已拥有定量资金，准备投资，有多个可供投资的项目，并可预知可供投资的项目的资金需求和投资回报率，求回报率最大化的投资组合。运用队列实现。-The companies already have quantitative funds are prepared to invest more available for investment in the project, can predict the demand for funds available for investment project