As to compound, extend and reuse models, the ideal of object oriented is used to present models.

将面向对象的思想应用于项目管理决策模型的抽象处理，实现了模型的复合、扩充和重用。

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In this course, we will present models and tools for analyzing, optimizing, planning, managing and controlling carrier systems.

在本课程中，我们将介绍用于分析、优化、规划、管理和控制运载系统的模型和工具。

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Based on the present models of planned replacement, this paper studies on the problem of replacement policy with repairable units and limited spares.

在现有的计划更换模型的基础上，研究了一种备件有限及部件可修的更换策略问题。

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But when a nameplate is dropped the owners of present models likely lose on their trade-ins.

FORBES: Nameplate Engineering Is Bad Business

The adoption of a new technology that injures or destroys present business models is commonplace.

FORBES: When Technology Disrupts Enforcement of Judicial Decisions

"I am quite skeptical that they present detailed, rigorous models of the evolution of the immune system through random mutation and natural selection, " he said.

MSN: Intelligent design vs. stack of science books