Abstract: Disclosed is a coil width control method including: a step in which a control unit generates a prediction model for predicting the width shrinkage of a coil, which occurs in the heat-treatment process and post-treatment process of a cold-rolled steel sheet production process, on the basis of historical operating results; a step in which the control unit receives the input width of the coil entering the heat-treatment process; and a step in which the control unit predicts the output width of the coil after the post-treatment process on the basis of the received input width and the conditions of the cold-rolled steel sheet production process, and controls in-furnace temperature and in-furnace tension of the heat-treatment process and elongation of the post-treatment process.

Abstract: An electronic device is provided which includes a power input unit including a first power input unit and a second power input unit, a switching unit including a first switching circuit connected with the first power input unit and a second switching circuit connected with the second power input unit, and a controller configured to receive selection information for selecting a power source to supply power to a load unit included in the electronic device of a first power source and a second power source, wherein the first power source and the second power source are connected with the first power input unit and the second power input unit, respectively, and control the switching unit to connect the first power source to the load unit according to the selection information.

Abstract: Disclosed is a coil width control method including: a step in which a control unit generates a prediction model for predicting the width shrinkage of a coil, which occurs in the heat-treatment process and post-treatment process of a cold-rolled steel sheet production process, on the basis of historical operating results; a step in which the control unit receives the input width of the coil entering the heat-treatment process; and a step in which the control unit predicts the output width of the coil after the post-treatment process on the basis of the received input width and the conditions of the cold-rolled steel sheet production process, and controls in-furnace temperature and in-furnace tension of the heat-treatment process and elongation of the post-treatment process.

Abstract: An electronic device is provided which includes a power input unit including a first power input unit and a second power input unit, a switching unit including a first switching circuit connected with the first power input unit and a second switching circuit connected with the second power input unit, and a controller configured to receive selection information for selecting a power source to supply power to a load unit included in the electronic device of a first power source and a second power source, wherein the first power source and the second power source are connected with the first power input unit and the second power input unit, respectively, and control the switching unit to connect the first power source to the load unit according to the selection information.

Abstract: An electronic device is provided. The electronic device includes a switch configured to selectively connect power supplied from a power adaptor connected to the electronic device, a system load configured to be included in the electronic device and to receive power from the power adaptor or a battery connected to the electronic device according to on/off of the switch, and a controller configured to turn off the switch when entering an emergency power mode in a state where the power adaptor is connected to the electronic device.