Abstract: The actual performance information classify part derives a classification result of an actual performance information on electric power demand, by a classification setting information, from an environment information and a date attribute information which is correlated with each of the electric power demands which is included in an actual performance information on electric power demand. The prediction information calculate part derives a classification result of a prediction target day, using the date attribute information of the prediction target day, which is a day to conduct a prediction, and the environment information which is measured before a start of the prediction of a prediction target day, and in addition, predicts an electric power demand of a prediction target day, based on the electric power demand of the actual performance information on electric power demand, which corresponds to the classification result of the prediction target day.

Abstract: A maintenance assistance device includes an attachment use time acquisition unit and a maintenance estimate time calculation unit. The attachment use time acquisition unit acquires a time during which an attachment is used. The attachment is mounted on a work machine and is different from a bucket. The maintenance estimate time calculation unit calculates a maintenance estimate time of a consumable equipped with the work machine based on the time during which the attachment is used.

Abstract: A working machine display system includes: a monitor including a display unit; a first monitor control unit connected to the monitor and configured to generate a screen for displaying various kinds of information of a working machine and output the screen as a signal to the monitor; a second monitor control unit connected to the monitor and configured to generate a screen for displaying special information of the working machine and output the screen as a signal to the monitor; and a return switch. The monitor displays the various kinds of information in accordance with a signal output from the first monitor control unit and displays the special information in accordance with a signal output from the second monitor control unit, and the return switch causes a transition from a display screen of the special information to a display screen of the various kinds of information.

Abstract: A display system of a working machine, includes: one or a plurality of cameras that acquires a peripheral state of the working machine; a display control unit that generates a temporally changing image and outputs, as a video signal, an image obtained by performing a predetermined process on an image or images captured by the one or the plurality of cameras; a monitor that displays, on a basis of the video signal output from the display control unit, the temporally changing image and the image obtained by performing the predetermined process; and an abnormality determination unit that determines that an abnormality has occurred in the display control unit in a case where the temporally changing image remains unchanged for a predetermined time.

Abstract: A working machine display system includes: a monitor including a display unit; a first monitor control unit connected to the monitor and configured to generate a screen for displaying various kinds of information of a working machine and output the screen as a signal to the monitor; a second monitor control unit connected to the monitor and configured to generate a screen for displaying special information of the working machine and output the screen as a signal to the monitor; and a return switch. The monitor displays the various kinds of information in accordance with a signal output from the first monitor control unit and displays the special information in accordance with a signal output from the second monitor control unit, and the return switch causes a transition from a display screen of the special information to a display screen of the various kinds of information.