符号学；用户任务模型；用户概念模型；用户思维模型；传统文化。

Semeiology; User's task model; User's concept model; User's thinking model; traditional culture.

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为改善用户界面的可用性提供有益信息，提出了一种基于任务模型的界面评估办法。

In this paper, a method to evaluate user interface by using task model is proposed. In order to improve the user interfaces and reach good usability.

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普适可用性的原则就是让用户界面的设计贴近于用户的任务模型，拉近了系统与用户的距离，降低用户使用系统时的认知负担。

The user interface based on pervasive usability is closer to the user's task model, and can reduce their cognitive burden when operating the system.

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