For the optimist, the problem is that simulation of the business domain model may, or may not, have any relevance in the system domain or in the enactment domain.
对于乐观主义者来说，其问题是：关于业务领域模型的仿真与系统领域或规则制定领域，或许相关，也或许无关。
RUP describes a model as an abstract representation or simulation of a system that provides a complete description of the system from a particular perspective.
RUP将模型定义为系统的抽象表示或模拟，可从特定的角度提供对系统的完整描述。
With the broad application of advance technology in ship power system, and its differences from the terrestrial power system, it is necessary to build up the model and simulation of ship power system.
随着新技术、新设备的广泛应用，由于全电力推进的船舶电力系统与陆地电力系统的差别，需要对全电力推进的船舶电力系统进行建模与数字仿真。
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