本文简要讨论了DB2和Informix的不同方面，例如编辑、体系结构、进程、内存模型、数据库和存储模型。
This article briefly discussed various aspects of DB2 and Informix, such as editions, architecture, process and memory model, databases and storage models.
用于面向进程的模型、面向数据的模型、数据流程图、数据进程图、结构化分析图和信息流图表。
Use for process-oriented models, data-oriented models, data flowcharts, data process diagrams, structured analysis diagrams, and information flow diagrams.
交通数据来源和模型方法研究是制约模型改进进程的主要因素。
Transportation data availability and model methodology research will constrain the progress of these improvements, however.
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