For Lesson 2, you create a UML project and an analysis model of use cases from those requirements and establish traceability back to the requirements.

对于课程2，您创建一个UML项目和一个来自那些请求的案例的分析模型，并建立追溯到请求的追溯性。

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Lesson 1. Develop transformations only when the semantic connections between the model elements are well understood.

经验1 .仅在充分理解了模型单元之间的语义连接后才进行转换的开发。

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But the sad lesson of this traditional model is clear: Excessive resources often arrive late in the development cycle, impacting productivity and competitiveness.

但是，这种传统模式的惨痛教训是明确的：在开发周期内过多的资源常常会晚到，影响生产率和竞争力。

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This lesson, or "model, " behaves very well when investors follow it.

WSJ: Book Review: Models Behaving Badly

It is part of a broader initiative, NYC21C, that began last year and looks for ways ways to educate students beyond the classic model of one teacher, one lesson and a 35-student classroom.

FORBES: Breakthroughs

Much theoretical work has been done to understand and model such changes, but the lesson I draw from chaos theory is that recognizing such changes in hindsight may be simple, but predicting them in advance is and will continue to be extremely difficult.

FORBES: Chaos Theory, Financial Markets, and Global Weirding