Abstract: A refrigerant cycle pressure control system includes: a heat exchanger cooling boil-off gas received from a storage tank; a refrigerant cycle including a refrigerant circulation line, a refrigerant compressor, and an expander; an inventory tank storing the refrigerant to be charged to the refrigerant cycle; a refrigerant supply line connecting the inventory tank to an upstream side of the refrigerant compressor to replenish the refrigerant cycle with the refrigerant; a refrigerant discharge line connecting a downstream side of the refrigerant compressor to the inventory tank to discharge the refrigerant from the refrigerant cycle to the inventory tank; and a pressure regulation line branched off of the refrigerant discharge line. The refrigerant cycle is depressurized by discharging the refrigerant from the refrigerant cycle through the refrigerant discharge line or the pressure regulation line.

Abstract: The present invention relates to a catalyst for hydrogenation of an aromatic compound, which is capable of greatly reducing the inactivation of a catalyst by using a support including a magnesium-based spinel structure, and a preparation method therefor.

Abstract: An electronic device including a memory device with improved reliability is provided. The semiconductor device comprises a data pin configured to transmit a data signal, a command/address pin configured to transmit a command and an address, a command/address receiver connected to the command/address pin, and a computing unit connected to the command/address receiver, wherein the command/address receiver receives a first command and a first address from the outside through the command/address pin and generates a first instruction on the basis of the first command and the first address, and the computing unit receives the first instruction and performs computation based on the first instruction.

Abstract: Provided is an electric bus and an electric bus battery exchange system. The electric bus according to the present invention includes: a battery exchange hole disposed on top of the electric bus for exchanging a discharged battery for a charged battery; a front camera unit taking front images in the process of entering the battery exchange station for battery exchange; a communication unit for receiving position information of the battery exchange unit from the battery exchange station; a route output unit outputting a predicted driving route for reaching a swapping point below the battery exchange unit based on the front images taken by the front camera unit and the position information of the battery exchange unit; and a display unit displaying the predicted driving route outputted by the route output unit, superimposed on the front images taken by the front camera unit.

Abstract: Provided is an electric bus and an electric bus battery exchange system. The electric bus according to the present invention includes: a battery exchange hole disposed on top of the electric bus for exchanging a discharged battery for a charged battery; a front camera unit taking front images in the process of entering the battery exchange station for battery exchange; a communication unit for receiving position information of the battery exchange unit from the battery exchange station; a route output unit outputting a predicted driving route for reaching a swapping point below the battery exchange unit based on the front images taken by the front camera unit and the position information of the battery exchange unit; and a display unit displaying the predicted driving route outputted by the route output unit, superimposed on the front images taken by the front camera unit.

Abstract: Provided is an electric bus battery exchange station. The electric bus battery exchange station according to the present invention includes: an exchange station body having a battery exchange, wherein said battery exchange unit is projected out to be connected with a hole of; an imaging unit taking images of the electric bus moving toward said exchange station body; an entry process storing unit storing entry process information needed in order that the electric bus is positioned exactly below the battery exchange unit; an entry information output unit comparing an entry state of the electric bus obtained from images taken by said imaging unit with the entry information stored, and outputting entry information for modifying the entry state of the electric bus to make equal to said entry process information; and an entry information providing unit providing information outputted by said entry information output unit to the electric bus.

Abstract: Provided is an electric bus and an electric bus battery exchange system. The electric bus according to the present invention includes: a battery exchange hole disposed on top of the electric bus for exchanging a discharged battery for a charged battery; a front camera unit taking front images in the process of entering the battery exchange station for battery exchange; a communication unit for receiving position information of the battery exchange unit from the battery exchange station; a route output unit outputting a predicted driving route for reaching a swapping point below the battery exchange unit based on the front images taken by the front camera unit and the position information of the battery exchange unit; and a display unit displaying the predicted driving route outputted by the route output unit, superimposed on the front images taken by the front camera unit.

Abstract: Provided is an electric bus battery exchange station. The electric bus battery exchange station according to the present invention includes: an exchange station body having a battery exchange, wherein said battery exchange unit is projected out to be connected with a hole of; an imaging unit taking images of the electric bus moving toward said exchange station body; an entry process storing unit storing entry process information needed in order that the electric bus is positioned exactly below the battery exchange unit; an entry information output unit comparing an entry state of the electric bus obtained from images taken by said imaging unit with the entry information stored, and outputting entry information for modifying the entry state of the electric bus to make equal to said entry process information; and an entry information providing unit providing information outputted by said entry information output unit to the electric bus.

Abstract: Provided is an electric bus and an electric bus battery exchange system. The electric bus according to the present invention includes: a battery exchange hole disposed on top of the electric bus for exchanging a discharged battery for a charged battery; a front camera unit taking front images in the process of entering the battery exchange station for battery exchange; a communication unit for receiving position information of the battery exchange unit from the battery exchange station; a route output unit outputting a predicted driving route for reaching a swapping point below the battery exchange unit based on the front images taken by the front camera unit and the position information of the battery exchange unit; and a display unit displaying the predicted driving route outputted by the route output unit, superimposed on the front images taken by the front camera unit.