Abstract: A radiation emission device is provided. The radiation emission device may include a cathode configured to emit an electron beam and an anode configured to rotate on a shaft. The anode may be situated to receive the electron beam from the cathode. The radiation emission device may further include a rotor configured to drive the anode to rotate. The rotor may be mechanically connected to the shaft. The radiation emission device may further include a sleeve configured to support the shaft via at least one bearing. The cathode, the anode, and the rotor may be enclosed in an enclosure that is connected to the sleeve. At least a portion of the sleeve may reside outside the enclosure.

Abstract: A radiation emission device is provided. The radiation emission device may include a cathode configured to emit an electron beam and an anode configured to rotate on a shaft. The anode may be situated to receive the electron beam from the cathode. The radiation emission device may further include a rotor configured to drive the anode to rotate. The rotor may be mechanically connected to the shaft. The radiation emission device may further include a sleeve configured to support the shaft via at least one bearing. The cathode, the anode, and the rotor may be enclosed in an enclosure that is connected to the sleeve. At least a portion of the sleeve may reside outside the enclosure.

Abstract: A radiation emission device is provided. The radiation emission device may include a cathode configured to emit an electron beam and an anode configured to rotate on a shaft. The anode may be situated to receive the electron beam from the cathode. The radiation emission device may further include a rotor configured to drive the anode to rotate. The rotor may be mechanically connected to the shaft. The radiation emission device may further include a sleeve configured to support the shaft via at least one bearing. The cathode, the anode, and the rotor may be enclosed in an enclosure that is connected to the sleeve. At least a portion of the sleeve may reside outside the enclosure.

Abstract: A radiation emission device is provided. The radiation emission device may include an anode, a first cathode, a heating device and an enclosure. The first cathode may include a first filament that emit an electron beam striking the anode to generate radioactive rays for imaging. The heating device may be located outside of the first cathode and be configured to warm up the anode. The enclosure may be configured to enclosure the first cathode and the anode.

Abstract: A radiation emission device is provided. The radiation emission device may include a cathode configured to emit an electron beam and an anode configured to rotate on a shaft. The anode may be situated to receive the electron beam from the cathode. The radiation emission device may further include a rotor configured to drive the anode to rotate. The rotor may be mechanically connected to the shaft. The radiation emission device may further include a sleeve configured to support the shaft via at least one bearing. The cathode, the anode, and the rotor may be enclosed in an enclosure that is connected to the sleeve. At least a portion of the sleeve may reside outside the enclosure.

Abstract: A radiation emission device is provided. The radiation emission device may include a cathode configured to emit an electron beam and an anode configured to rotate on a shaft. The anode may be situated to receive the electron beam from the cathode. The radiation emission device may further include a rotor configured to drive the anode to rotate. The rotor may be mechanically connected to the shaft. The radiation emission device may further include a sleeve configured to support the shaft via at least one bearing. The cathode, the anode, and the rotor may be enclosed in an enclosure that is connected to the sleeve. At least a portion of the sleeve may reside outside the enclosure.

Abstract: A radiation emission device is provided. The radiation emission device may include an anode, a first cathode, a heating device and an enclosure. The first cathode may include a first filament that emit an electron beam striking the anode to generate radioactive rays for imaging. The heating device may be located outside of the first cathode and be configured to warm up the anode. The enclosure may be configured to enclosure the first cathode and the anode.

Abstract: A radiation emission device is provided. The radiation emission device may include a cathode configured to emit an electron beam and an anode configured to rotate on a shaft. The anode may be situated to receive the electron beam from the cathode. The radiation emission device may further include a rotor configured to drive the anode to rotate. The rotor may be mechanically connected to the shaft. The radiation emission device may further include a sleeve configured to support the shaft via at least one bearing. The cathode, the anode, and the rotor may be enclosed in an enclosure that is connected to the sleeve. At least a portion of the sleeve may reside outside the enclosure.

Abstract: The disclosure discloses a door lock including a locking mechanism, a power interface, a main control board, an environmental information collection device and a power supply management device, where the locking mechanism, power interface and power supply management device are respectively connected with the main control board, the environmental information collection device connected with the power supply management device, the environmental information collection device configured to collect and transmit environmental information on the surrounding of the door lock to the power supply management device; the power supply management device configured to carry out processing according to the environmental information and output a power supply mode matched with the environmental information to the main control board; and the power interface configured to execute an operation related to the power supply mode matched with the environmental information according to a power supply instruction from the main control

Abstract: The disclosure discloses a door lock including a locking mechanism, a power interface, a main control board, an environmental information collection device and a power supply management device, where the locking mechanism, power interface and power supply management device are respectively connected with the main control board, the environmental information collection device connected with the power supply management device, the environmental information collection device configured to collect and transmit environmental information on the surrounding of the door lock to the power supply management device; the power supply management device configured to carry out processing according to the environmental information and output a power supply mode matched with the environmental information to the main control board; and the power interface configured to execute an operation related to the power supply mode matched with the environmental information according to a power supply instruction from the main control

Abstract: The disclosure discloses a door lock including a locking mechanism, a power interface, a main control board, an environmental information collection device and a power supply management device, where the locking mechanism, power interface and power supply management device are respectively connected with the main control board, the environmental information collection device connected with the power supply management device, the environmental information collection device configured to collect and transmit environmental information on the surrounding of the door lock to the power supply management device; the power supply management device configured to carry out processing according to the environmental information and output a power supply mode matched with the environmental information to the main control board; and the power interface configured to execute an operation related to the power supply mode matched with the environmental information according to a power supply instruction from the main control

Abstract: Described herein are one or more implementations for electromagnetic tracking of position and orientation that utilizes a discretized numerical field model, rather than the conventional analytical dipole model.