Abstract: A revocable lightweight group authentication method and system for an edge controller is described here. When the edge controller needs to be registered, an edge server generates a private key of the edge controller and sends the private key to the edge controller, and meanwhile adds the edge controller to a group list of the edge server; the edge server updates a certificate of the edge controller, adds the certificate to a certificate list of the edge server and sends the certificate to the edge controller so that the edge controller updates the private key according to the updated certificate; and then the edge controller generates a signature according to the updated private key, and sends the signature to the edge server so that the edge server authenticates the edge controller after determining that the signature meets preset requirements.

Abstract: The present invention relates to the field of intelligent driving. Disclosed is a method for detecting the position relation between a vehicle and a lane line. The method for detecting the position relation between a vehicle and a lane line comprises: obtaining a vehicle model, the vehicle model being represented by a plurality of first coordinates in a world coordinate system; obtaining a lane line image, the lane line image being captured by a camera disposed on a vehicle; obtaining a calibration parameter of the camera; determining, according to the lane line image and the calibration parameter, a first line segment of a lane line mapped into the world coordinate system; and determining the position relation between the lane line and the vehicle according to the position relation between the first line segment and the plurality of first coordinates in the world coordinate system.

Abstract: A revocable lightweight group authentication method and system for an edge controller is described here. When the edge controller needs to be registered, an edge server generates a private key of the edge controller and sends the private key to the edge controller, and meanwhile adds the edge controller to a group list of the edge server; the edge server updates a certificate of the edge controller, adds the certificate to a certificate list of the edge server and sends the certificate to the edge controller so that the edge controller updates the private key according to the updated certificate; and then the edge controller generates a signature according to the updated private key, and sends the signature to the edge server so that the edge server authenticates the edge controller after determining that the signature meets preset requirements.

Abstract: Using persistent party rooms, including: initializing, via a computing device, a global array according to a hierarchical server architecture; determining, via the computing device, whether or not to create a new persistent party room or to join a previously bookmarked persistent party room; creating, via the computing device, the new persistent party room within a position indexed in the global array; and joining, via the computing device, the previously bookmarked persistent party room by searching for the previously bookmarked party room utilizing the global array.

Abstract: Loading program modules with hierarchical relationship can include receiving a request for loading the program modules from a client, the request including root module information in the program modules to be loaded and, according to the root module information in the request, obtaining a root module to be loaded and child modules of the root module to be loaded using a central processing unit. The root module and the child modules of the root module can be sent to the client.

Abstract: A composite damper includes a first connector, a second connector and at least a dampening device. The first connector and the second connector are relative movable to each other, and the at least one dampening device is received between the first connector and the second connector. The dampening device comprises at least a rigid member and at least a dampening member, wherein the rigid member has the properties of high stiffness and low damping, while the dampening member has the properties of low stiffness and high damping. With such design, the composite damper could absorb vibrations during earthquakes.

Abstract: A composite damper includes a first connector, a second connector and at least a dampening device. The first connector and the second connector are relative movable to each other, and the at least one dampening device is received between the first connector and the second connector. The dampening device comprises at least a rigid member and at least a dampening member, wherein the rigid member has the properties of high stiffness and low damping, while the dampening member has the properties of low stiffness and high damping. With such design, the composite damper could absorb vibrations during earthquakes.

Abstract: A method and apparatus is disclosed that is capable of transmitting video signals and/or audio signals using the HDMI interface standard or the DisplayPort interface standard. A dual mode transmitter is disclosed that is configurable to transmit to a first sink device, configured in accordance with a HDMI display interface, in a HDMI mode of operation and/or a second sink device, configured in accordance with a DisplayPort display interface, in a DisplayPort mode of operation. The dual mode transmitter is configured to receive a biasing current from the first sink device in the HDMI mode of operation or to internally provide the biasing current in DisplayPort mode of operation by selecting impedances from selectable impedance networks. The dual mode transmitter is configured to transmit the video signals and/or audio signals by biasing one or more transistors using the biasing current.

Abstract: Loading program modules with hierarchical relationship can include receiving a request for loading the program modules from a client, the request including root module information in the program modules to be loaded and, according to the root module information in the request, obtaining a root module to be loaded and child modules of the root module to be loaded using a central processing unit. The root module and the child modules of the root module can be sent to the client.

Abstract: Using persistent party rooms, including: initializing, via a computing device, a global array according to a hierarchical server architecture; determining, via the computing device, whether or not to create a new persistent party room or to join a previously bookmarked persistent party room; creating, via the computing device, the new persistent party room within a position indexed in the global array; and joining, via the computing device, the previously bookmarked persistent party room by searching for the previously bookmarked party room utilizing the global array.

Abstract: A method and apparatus is disclosed that is capable of transmitting video signals and/or audio signals using the HDMI interface standard or the DisplayPort interface standard. A dual mode transmitter is disclosed that is configurable to transmit to a first sink device, configured in accordance with a HDMI display interface, in a HDMI mode of operation and/or a second sink device, configured in accordance with a DisplayPort display interface, in a DisplayPort mode of operation. The dual mode transmitter is configured to receive a biasing current from the first sink device in the HDMI mode of operation or to internally provide the biasing current in DisplayPort mode of operation by selecting impedances from selectable impedance networks. The dual mode transmitter is configured to transmit the video signals and/or audio signals by biasing one or more transistors using the biasing current.

Abstract: A method and apparatus is disclosed that is capable of transmitting video signals and/or audio signals using the HDMI interface standard or the DisplayPort interface standard. A dual mode transmitter is disclosed that is configurable to transmit to a first sink device, configured in accordance with a HDMI display interface, in a HDMI mode of operation and/or a second sink device, configured in accordance with a DisplayPort display interface, in a DisplayPort mode of operation. The dual mode transmitter is configured to receive a biasing current from the first sink device in the HDMI mode of operation or to internally provide the biasing current in DisplayPort mode of operation by selecting impedances from selectable impedance networks. The dual mode transmitter is configured to transmit the video signals and/or audio signals by biasing one or more transistors using the biasing current.

Abstract: A method and apparatus is disclosed that is capable of transmitting video signals and/or audio signals using the HDMI interface standard or the DisplayPort interface standard. A dual mode transmitter is disclosed that is configurable to transmit to a first sink device, configured in accordance with a HDMI display interface, in a HDMI mode of operation and/or a second sink device, configured in accordance with a DisplayPort display interface, in a DisplayPort mode of operation. The dual mode transmitter is configured to receive a biasing current from the first sink device in the HDMI mode of operation or to internally provide the biasing current in DisplayPort mode of operation by selecting impedances from selectable impedance networks. The dual mode transmitter is configured to transmit the video signals and/or audio signals by biasing one or more transistors using the biasing current.

Abstract: A connector includes an insulating housing and at least one inserting pin. The insulating housing includes at least one groove and at least one plug receiving hole. The inserting pin penetrates through the groove, and is secured by a sidewall of the groove. The inserting pin includes a resilient leg for being electrically connected to a plug received in the insulating housing.

Abstract: The present invention provides a tunable oscillator. A voltage-to-current converter receives as input a voltage from a phase-locked loop and outputs a first current. A current-controlled oscillator receives the first current and outputs a frequency responsive to the voltage. A second current is input into the current-controlled oscillator to adjust the gain of the current-controlled oscillator. A third current is input into the voltage-to-current converter to adjust the first current and the gain of the voltage-to-current converter. The second and third current values are set using a two-stage pre-calibration method. During the pre-calibration, a control circuit adjusts and then sets the second and third currents so that the output frequency spans a lock-in frequency range required by the phase-locked-loop over a voltage range spanning voltage tolerance of a loop capacitor of the phase-locked-loop.

Abstract: A delay locked loop (DLL) includes a delay unit configured to delay an input clock signal by a specified amount to produce a delayed clock signal. A phase detector receives as input the input clock signal and the delayed clock signal and outputs a signal proportional to the phase difference between the input clock signal and the delayed clock signal to provide a control voltage for adjusting the delay to the specified amount. A pulse swallower removes a pulse from the input clock signal or from the delayed clock signal to reverse the direction of the control signal.

Abstract: The present invention provides a current controlled oscillator comprising a first section providing a first differential output and a second section providing a second differential output. A loading structure comprised of resistive and reactive elements electrically connects the first differential output with the second differential output. The resistive and reactive elements have values chosen such that the resistive elements substantially extend the linear operating frequency range of the current controlled oscillator. Transistors of the loading structure have which are tied to a power supply rejection ratio compensation section for compensating for variations in power supply voltage.

Abstract: A delay locked loop (DLL) includes a delay unit configured to delay an input clock signal by a specified amount to produce a delayed clock signal. A phase detector receives as input the input clock signal and the delayed clock signal and outputs a signal proportional to the phase difference between the input clock signal and the delayed clock signal to provide a control voltage for adjusting the delay to the specified amount. A pulse swallower removes a pulse from the input clock signal or from the delayed clock signal to reverse the direction of the control signal.