What is a Model?

什么是模型？

A model is a simplification of reality.

模型是对现实的简化

A model provides the blueprints of a system. Models may encompass detailed plans, as well as more general plans that give a 30,000-foot view of the system under consideration. A good model includes those elements that have broad effect and omits those minor elements that are not relevant to the given level of abstraction. Every system may be described from different aspects using different models, and each model is therefore a semantically closed abstraction of the system. A model may be structural, emphasizing the organization of the system, or it may be behavioral, emphasizing the dynamics of the system.

模型可以提供一套系统的蓝图。模型可以包括相当精细的规划作业。也可以是相当概观的规划 i.e. 类似于一个30,000英尺的概览视图。一个好的模型应该将所有重要的元素包含进去，而忽略与抽象化层次无关的次要的元素。每一套系统要描绘不同的观点时都要设计有不同的模型，而每一个模型在其涵义上均与某种层次的抽象化有关。模型可以是结构化的模型来强调一个系统的组织葵构 也可以是一个行为模型来强调，套系统的动态行为。

Why do we model? There is one fundamental reason.

我们为什么建模？有一个根本原因。

We build models so that we can better understand the system we are developing.

我们建立模型，以便我们能够更好地理解我们正在开发的系统。

Through modeling, we achieve four aims:

通过建模，我们实现了四个目标:

1. Models help us to visualize a system as it is or as we want it to be.
2. Models permit us to specify the structure or behavior of a system.
3. Models give us a template that guides us in constructing a system.
4. Models document the decisions we have made.

1. 模型帮助我们将系统可视化或按照我们的需要进行可视化。
2. 模型允许我们指定一个系统的结构或行为。
3. 模型为我们提供了一个指导我们构建系统的模板。
4. 模型记录我们所做的决定。

Other related article

• What is UML?
• Why UML Modeling?
• Overview of the 14 UML Diagram Types

其他相關文章

• 什么是UML？
• 为什么使用UML建模？
• 14个UML图类型概述