Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for a virtual reality (VR) head-mounted apparatus are provided. One of the apparatus includes: a first convex lens on a side of the apparatus close to a user's eye when the user wears the apparatus, a partial-reflection partial-transmission lens located in the apparatus and on a side of the first convex lens away from the user's eye; and a camera located between the first convex lens and the partial-reflection partial-transmission lens. The partial-reflection partial-transmission lens is positioned and configured to reflect infrared light from the user's eye to the camera. The VR head-mounted apparatus improves the acquisition accuracy of an infrared image of an eye of the user wearing the apparatus.

Abstract: A service processing method includes: receiving RF signals sent by at least one terminal device, the RF signals including at least one device identifier of the at least one terminal device; selecting an RF signal from the received RF signals, and determining a terminal device corresponding to a device identifier included in the RF signal as a target payment device; collecting first biometric feature information of a user using the terminal device; and after obtaining a verification result of a verification on the user's identity based on the first biometric feature information, sending a payment request to a server if the verification is passed, wherein the payment request is configured to request for completing payment based on a payment account corresponding to the target payment device.

Abstract: This disclosure relates to radio frequency identification (RFID)-based communications technologies. In one aspect, a radio-frequency-based communications apparatus includes an antenna, a near field communication (NFC) radio frequency module and an electronic product code (EPC) radio frequency module separately connected to the antenna, an NFC processing module connected to the NFC radio frequency module, and an EPC processing module connected to the EPC radio frequency module. The NFC radio frequency module and the NFC processing module are configured to process signals transmitted according to one or more predetermined NFC protocols. The EPC radio frequency module and the EPC processing module are configured to process signals transmitted according to one or more predetermined EPC protocols.

Abstract: A portable wire cutting device for sampling a steel ingot includes a wire rack device, a driving system, and a multi-axis moving device. The wire rack device includes a first corner wheel, a second corner wheel, a transition wheel, a steering wheel, a first wire rack, a second wire rack, and a wire winding drum. The driving system includes a wire drum motor and a molybdenum wire, wherein the wire drum motor provides power driving for the operation of a cutting line; and the molybdenum wire is a closed molybdenum wire coil connected in an end-to-end manner, the molybdenum wire is wrapped around the first corner wheel, the second corner wheel, the wire winding drum, and an inner side of the transition wheel in a looping manner, and during operation, the cutting line performs wire cutting on an object by the molybdenum wire.

Abstract: The present specification describes to a self-service payment device and a control method thereof. One example method includes determining that a removable cover plate is in a first state, wherein the removable cover plate and a payment box form an enclosed space when the removable cover plate is in the first state, and the top of the payment box is open when the removable cover plate is in a second state; reading, using at least one radio frequency identification (RFID) antenna fastened to at least one inner wall of the payment box, at least one RFID tag, wherein each RFID tag is associated with a merchandise to be paid inside the payment box; and providing payment information based on the at least one RFID tag.

Abstract: The present disclosure provides a video picture coding method, a video picture decoding method, a coding device, and a decoding device. The method includes: determining a distance between control points for an affine picture block; determining a motion vector difference for the affine picture block, motion vectors of the control points being used to determine the motion vector difference; and performing coding processing on the affine picture block over a size that includes a horizontal length and a vertical length, wherein the horizontal length and the vertical length vary based on the distance between the control points, the motion vector difference, and a motion vector precision.

Abstract: The specification discloses a system and a method for realizing identity identification based on a radio frequency identification technology. The system comprises: a radio frequency detector on the ground and configured to detect radio frequency tags and send, when a radio frequency tag is detected, information carried in the radio frequency tag to a controller; a camera configured to collect a face image and send the collected face image to the controller; and the controller, configured to: determine, according to the information, a first identification of a user corresponding to the radio frequency tag, determine, according to the face image, a second identification of the user, and control a turnstile to allow the user to pass through when the first identification of the user and the second identification of the user match.

Abstract: Example embodiments relate to a method and a control unit, wherein a drive system having an electric machine and having an internal combustion engine with at least a first cylinder and a crankshaft is provided. A fuel feed to at least the first cylinder of the internal combustion engine is deactivated, wherein the electric machine is coupled fixedly in terms of torque to the internal combustion engine. The electric machine is actuated such that the crankshaft of the internal combustion engine rotates at a predefined rotational speed, wherein a first cylinder segment time duration, which is assigned to the first cylinder, is detected. A corrective value is determined in a manner dependent on the first cylinder segment time duration.

Abstract: A method for blockchain-based data verification is provided. The method includes: obtaining target data submitted by a data submitter, wherein a first data digest of the target data is recorded in a blockchain; computing a second data digest of the target data; determining whether the second data digest matches the first data digest of the target data recorded in the blockchain; and determining that the target data submitted by the data submitter is valid in response to determining that the second data digest matches the first data digest of the target data recorded in the blockchain.

Abstract: Provided is a method for blockchain-based recordkeeping and implementable by a terminal device. The method comprises: obtaining target data; computing a data digest of the target data, and extracting a key segment from the target data; signing, in a secure operation environment included in the terminal device, the data digest and/or the key segment based on a private key associated with the terminal device to generate a signature; and submitting to a blockchain the data digest, the key segment, and the signature, for one or more nodes in the blockchain to verify the signature based on a public key corresponding to the private key, and to record the data digest and the key segment in the blockchain in response to the signature being verified to be valid.

Abstract: The present disclosure provides a method and device for in-vehicle payment. A face image of an in-vehicle user and a geographic location of the in-vehicle user are received at a point of a ride route traveled by a vehicle occupied by the in-vehicle user. An image set associated with the geographic location is received from an image database using the geographic location of the in-vehicle user. The image set includes face images of a plurality of users. The face image of the in-vehicle user is compared with face images in the image set to determine an identity of the in-vehicle user. A fare deduction account corresponding to the in-vehicle user is identified using the identity of the in-vehicle user. A fare corresponding to the ride route is deducted from the fare deduction account.

Abstract: A hard disk drive includes a first actuator and a second actuator. The first actuator is coupled to a first slider, which includes a first read transducer and a first write transducer. Both the first read transducer and the first write transducer are positioned away from a first longitudinal centerline of the first slider. The second actuator is coupled to a second slider, which includes a second read transducer and a second write transducer. Both the second read transducer and the second write transducer are positioned away from a second longitudinal centerline of the second slider.

Abstract: Association information received from a number of mobile devices is recorded at a server end, where each mobile device is associated with a user that is pre-registered with the server end. An identification request is received at the server end and from a cashier device, where the identification request includes identity information associated with a particular user. One or more payment candidates corresponding to the cashier device are determined by the server end. A particular user account corresponding to the particular user is determined by the server end by comparing the identity information from the identification request with identity information associated with each of the payment candidates. The particular user account is returned by the server end to the cashier device for making a payment.

Abstract: The current invention is regarding an electrical slip ring system for high speed applications, which require slip rings to operate at speeds more than 60,000 RPM. It consists of multiple single stage slip rings and multiple gear devices, where all the stators, except the last one, are rotational. The speed limit on the slip ring market, by using the advanced fiber brush bundles, is about 10,000 RPM without cooling, or lubricating. The basic idea is that by designing gears, we can always can make sure the relative speed between the rotor and the stator in each stage is <=10000 rpm.

Abstract: The current disclosure is regarding an electrical slip ring assembly that transmit signals, data, and power across rotary platforms, especially for high frequency applications. The high frequency slip ring assembly with through bore may include a first stage slip ring, a second stage slip ring, a gear assembly, and an internal cable assembly. Rings may have an angled notch on a circumference to break said rings and have the same diameter. The first stage slip ring and second stage slip ring may be connected in series sequence, i.e., the stator in first stage slip ring is mechanically connected with the rotor in second stage slip ring. The internal cable assembly electrically connects the brush assembly in first stage slip ring with the ring assembly in said second stage slip ring in each channel respectively.

Abstract: Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for paying transportation fare. One of the methods includes: communicating to a toll terminal based on near field communication (NFC) technology, for paying a fare of using a transport system associated with the toll terminal; deducting, through a user account, the fare from an account balance associated with the user account; recording a remaining account balance associated with the user account after the fare is deducted; determining that the remaining account balance is less than a predetermined threshold; and providing the remaining account balance to a second mobile device over the NFC in response to determining that the remaining account balance is less than a predetermined threshold to trigger a request from the second mobile device to a transaction server to add balance to the user account.

Abstract: A fuel injector for an internal combustion engine of a motor vehicle. The fuel injector including the following: (a) a pole piece, (b) an armature which can be moved along a movement axis, (c) a coil and (d) a permanent magnet, wherein the movable armature has at least one electrically insulating element which is designed to reduce eddy currents in the armature, and wherein the permanent magnet is fitted such that it generates a magnetic field which produces a force which acts on the armature in the direction of the pole piece. The invention also describes a method for ascertaining a position of a movable armature in a fuel injector and also an engine controller.

Abstract: A method for operating an electrostatic soot sensor by a voltage supply, having a first electrode, a second electrode, and a guard electrode that are electrically insulated from one another. A first electrical potential is applied to the first electrode, and a second electrical potential is applied to the second electrode by the voltage supply, such that a voltage arises between the first and the second electrode. A guard potential is applied to the guard electrode. The measuring current flowing between the first the second electrode is measured with a current-measuring element. In order to determine readiness of the electrostatic soot sensor and with which measuring errors caused by leakage currents can be compensated, to measure leakage currents the first electrode is disconnected from the first electrical potential, and the leakage current flowing between the guard electrode and the second electrode is measured with the current-measuring element.

Abstract: Embodiments of this application provide a transmission path determining method and apparatus, where the method includes: determining that a current path corresponding to a flow to which a to-be-transmitted packet belongs is congested; and determining a target path for the to-be-transmitted packet based on a path congestion information table, and adding information about the target path to the to-be-transmitted packet, so as to transmit the to-be-transmitted packet based on the target path, where a congestion degree of the target path is less than a congestion degree of the current path, each entry of the path congestion information table includes a transmission path and congestion information corresponding to the transmission path, and the congestion information is used to indicate a congestion degree of the transmission path.

Abstract: A method for operating a nitrogen oxide sensor of a vehicle having a first nitrogen oxide sensor, a second nitrogen oxide sensor and a catalytic converter, one of the first and second nitrogen oxide sensors being arranged upstream of the catalytic converter with respect to the exhaust gas flow direction, and the other of the first and second nitrogen oxide sensors being arranged downstream of the catalytic converter, includes: determining a first characteristic value of the first nitrogen oxide sensor; determining a second characteristic value of the second nitrogen oxide sensor determining a ratio of the first characteristic value to the second characteristic value; and adapting a sensor or measured value of the second nitrogen oxide sensor in accordance with the ratio of the first characteristic value to the second characteristic value.