Abstract: A method and module for estimating after-charge drivable range of an electric vehicle and a driving assistant device are provided. The method includes a power supplement location selecting step, a planned charging time determining step, an after-charge total power estimating step, and an after-charge drivable range estimating step. The planned charging time determining step calculates an estimated driving time for arriving at each power supplement location and an estimated charge waiting time, and determines a planned charging time at each power supplement location. The after-charge total power estimating step calculates an estimated power increment of the electric vehicle and an estimated after-charge total power. The after-charge drivable range estimating step calculates an estimated after-charge drivable range of the electric vehicle centering at each power supplement location according to the current driving information and each estimated after-charge total power.

Abstract: A data classification system is provided. The data classification system includes a fetch unit, a classification tree module, and a data repository. The fetch unit is adapted for receiving data including at least one datum, and fetching a data information contained in the data. The classification tree module is adapted for classifying the data in a manner of a tree structure according to the data info illation, and building a classification tree thereby. The data repository is adapted for storing the classification tree and the data.

Abstract: A data classification system is provided. The data classification system includes a fetch unit, a classification tree module, and a data repository. The fetch unit is adapted for receiving data including at least one datum, and fetching a data information contained in the data. The classification tree module is adapted for classifying the data in a manner of a tree structure according to the data information, and building a classification tree thereby. The data repository is adapted for storing the classification tree and the data. Therefore, the present invention provides a hierarchical structure which is adapted to accelerate a speed for searching data.