为建立一个可供多用户、多功能的示波器软件，本文提供一个可供修正的管道与过滤器模型。

To construct software of more users and more functions for oscilloscopes, the paper will provide a modified pipe-and-filter model as reference.

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在仓库目标模型中创建一个过滤器表达式，这将用到默认值(如有提供)。

A filter expression is created in the warehouse target model which will use the default value (if provided).

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这些保持不变的数据源查询对象可被模型中的其他查询对象、计算器、以及过滤器所引用。

These unmodified data source query subjects can then be referenced by other query subjects, calculations, and filters within the model.

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