Context-aware user interface plays an important role in many human-computer Interaction tasks of location based services.\nAlthough spatial models for context-aware systems have been studied extensively, how to locate specific spatial information for\nusers is still not well resolved, which is important in the mobile environment where location based services users are impeded\nby device limitations. Better context-aware human-computer interaction models of mobile location based services are needed not\njust to predict performance outcomes, such as whether people will be able to find the information needed to complete a humancomputer\ninteraction task, but to understand human processes that interact in spatial query, which will in turn inform the detailed\ndesign of better user interfaces in mobile location based services. In this study, a context-aware adaptive model for mobile location\nbased services interface is proposed,which contains three major sections: purpose, adjustment, and adaptation. Based on thismodel\nwe try to describe the process of user operation and interface adaptation clearly through the dynamic interaction between users\nand the interface. Then we show how the model applies users� demands in a complicated environment and suggested the feasibility\nby the experimental results.
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