With the theory of stochastic differential equation, the authors discuss a problem of a class of risk investment portfolio with stochastic character.
利用随机微分方程理论，对一类具有随机特征的风险投资组合问题进行深入研究。
A optional model of portfolio investment with fuzzy-coefficient in which profit rates and risk rates are fuzzy Numbers is presented in this paper.
针对预期收益率与风险损失率为模糊数时，建立了一种具有模糊系数的证券组合投资选择模型。
Based on mathematical methods, the article explores the risk and profit of stock portfolio and analyzes the strategies and methods of stock investment portfolio.
在其风险与收益的控制方面，应运用数学方法研究股票投资组合的内涵，以便制定出正确的股票投资组合的策略。
The purpose for this model is to rationally allocate the capital and other resources and to maximize the profit of investment project portfolio within the risk bearing capability.
该模型在保证资金等资源合理配置的前提下，在风险承受范围内，实现了项目组合收益的最大化。
The profit rate, investment risk and transaction cost are synthetically considered in this new model, which is very useful in the portfolio selection.
在本模型中综合考虑了证券组合的收益，风险，交易费用等因素，对投资者选择有效证券组合有一定的实用价值。
Then the methods of fuzzy optimization and evolution programming are adopted to study the portfolio investment under a new risk concept, and an algorithm for solving the problem is given.
运用模糊优化和进化规划方法，研究新风险概念下的模糊证券组合选择，并给出了其相应算法。
Virtual R&D teams have been the main organizations of High-tech Enterprises because they optimize R&D resource portfolio, cut down R&D investment cost and risk.
虚拟R&D团队因其资源优化组合、降低R&D成本，规避R&D风险等优势，成为今后高新技术企业的主要组织形式。
We discuss the problem of portfolio investment with risk minimization subject to nonnegative investment proportional coefficient.
本文讨论基于最小路径和最小割集的复杂系统可靠性的描述与计算问题。
We discuss the problem of portfolio investment with risk minimization subject to nonnegative investment proportional coefficient.
本文讨论基于最小路径和最小割集的复杂系统可靠性的描述与计算问题。
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