PI：帕累托改进

“Pareto Improved”一词在学术研究与科学领域中十分常见，尤其在数学及其相关学科的应用中。为了便于快速书写和日常使用，该术语常被简写为“PI”。其对应的中文释义为“帕累托改进”，意指在不损害任何一方利益的前提下，至少使一方状况变得更好的资源配置优化方式。

Method of Pareto improved solutions based on sensitivity analysis
基于灵敏度分析的Pareto解改进计算方法
Before reform of property rights, perfect Nash equilibrium of sub gaming was not optimal; Pareto dominance could be improved by bargaining solution.
公立医院改制前双方博弈的子博弈精炼纳什均衡为非帕雷托最优合同，可通过讨价还价实现帕雷托改进。
With the development of society, Pareto distribution has been improved and extended to several kinds of Pareto distribution, which formed Pareto Distribution Family.
随着时间的推移、社会的发展，Pareto分布也在不断地完善、改进、推广，从而形成了多种形式的Pareto分布、广义Pareto分布乃至Pareto分布族。
The Pareto Criterion or the 80 / 20 Principle claims that the efficiency can be highly improved as long as the crucial factor is grasped.
帕累托原则或称80/20法则说明，只要抓住起决定性作用的要素，就能极大提高效率。
The Pareto solution set of composite barrel is obtained by optimal solving. The optimization examples show that the uniformly distributed Pareto front is obtained by using NSG ⅱ, and the corresponding design solution of composite barrel is improved in stiffness and weight.
优化算例表明，采用NSGA-Ⅱ获得的Pareto前沿面曲线分布均匀，其所对应的复合材料身管设计方案在刚度和重量方面均有改善。

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