| 摘要 |
An activity-modeling system computes an amount of time that a user is expected to spend when performing activities of a certain type. During operation, the system can obtain a plurality of location events associated with the user, such that a respective location event indicates a time at which a user logged his location while performed an activity related to the activity type. The system selects, from the plurality of location events, a set of location events associated with the activity type. The system determines an activity start-time and an activity end-time for the activity type from the set of location events, and computes an activity-duration time for the activity type based on the determined activity start-time and the activity end-time. |
