Abstract: Described are methods, systems, and devices for correcting ionospheric error. In some aspects, a mobile device equipped with a Global Navigation Satellite System (GNSS) receiver is configured to determine a positioning measurement of a GNSS signal. The mobile device is further configured to receive augmentation data from an augmentation system. When the mobile device is unable to obtain newer augmentation data, the mobile device can instead obtain augmentation data associated with historical Total Electron Content (TEC) values. In such instances, the augmentation data will have been generated to represent ionospheric delay during a time period that ended before the augmentation data is obtained. Based on the augmentation data associated with historical TEC values and a pierce point of the received GNSS signal, an ionospheric error in the positioning measurement of the GNSS signal can be determined and corrected.

Abstract: A method for pre-positioning a rotor of an outdoor fan in a counter-rotation state before operation includes: 1) during a counter-operation state, sending, by a microprocessor, a signal to the inverter circuit to turn off all upper electronic switching tubes and turn on all lower electronic switching tubes; 2) measuring a phase current of each phase coil winding in the stator assembly; 3) calculating a back electromotive force of each phase coil winding in the stator; 4) calculating a position angle of the rotor assembly; 5) checking if the phase current of each phase coil winding is all smaller than a preset threshold current; if not, return to 1); if yes, proceed to 6); and 6) calculating a resistance torque to stop the rotor assembly based on the position angle of the rotor assembly, and then stopping the rotor assembly to achieve pre-positioning of the rotor before starting.

Abstract: A power divider and an electronic device are provided. The power divider includes: a main port having an input characteristic admittance; a first output port having a first characteristic admittance; a second output port having a second characteristic admittance, where the second and the first characteristic admittances have a predetermined ratio relationship; a first adjustment branch coupled between the main port and the first output port; and a second adjustment branch coupled between the main port and the second output port. The input characteristic admittance is a sum of admittances presented by the first and second adjustment branches at the main port. The admittance presented by the first adjustment branch at the main port and the admittance presented by the second adjustment branch at the main port are adjustable and the input characteristic admittance is enabled to be equal to a sum of the first and the second characteristic admittances.

Abstract: This application discloses a detergent tablet free of SLS surfactant and its preparation method. The detergent tablet includes a film-forming agent, an anionic surfactant, a non-ionic surfactant, a chelating agent, an enzyme preparation, an auxiliary agent and a essence. The film-forming agent includes one or more of polyvinyl alcohol, cellulose, and dodecenyl succinate starch ester. The anionic surfactant includes at least two of sodium ?-olefin sulfonate, sodium fatty acid methyl ester sulfonate, and sodium hydroxyethyl sulfonate. The non-ionic surfactant includes at least two of fatty alcohol polyoxyethylene ethers, fatty acid methyl ester ethoxylate, and oil ethoxylate.

Abstract: Frequency channel numbers used for sensing are determined from M sensing resource blocks; and a sensing signal is sent on the frequency channel numbers used for sensing. The M sensing resource blocks are determined from M1 candidate resource blocks, and include a 1st candidate resource block and an M1th candidate resource block in the M1 candidate resource blocks; and a quantity of frequency channel numbers included in each of the M sensing resource blocks is K.

Abstract: A directional antenna and a communication device are provided in this disclosure. The directional antenna includes a first element, a second element and a first reflector. An operating frequency band of the first element is a first frequency band, and an operating frequency band of the second element is a second frequency band. An equivalent electrical length of the first reflector is equal to or slightly greater than one half of the wavelength of the first frequency band. The first reflector includes a first resonant circuit, the first resonant circuit includes a first capacitive part and a first inductive part that are connected in parallel. A resonance frequency of the first resonant circuit is within the second frequency band, and an equivalent electrical length of any part other than the first resonant circuit in the first reflector is less than one half of the wavelength of the second frequency band.

Abstract: An intelligent production line for turning tool bit cavities and an application method are provided, which solve the problem that a production line in the prior art has low working efficiency. The intelligent production line has the beneficial effects of a compact arrangement structure, higher safety and improved working efficiency. The intelligent production line for turning tool bit cavities includes a robot. Material tables and at least one machining center are arranged around the robot. A transfer station used for transferring materials is arranged between the machining center and the robot. A protective fence is arranged between a position above the material tables and the robot, and between the transfer station and the robot. The robot is provided with a mechanical arm including a base plate. The base plate is provided with at least one clamping jaw and fixed with a laser detecting unit for detecting the materials.

Abstract: The main driver information acquisition-based vehicle control system comprises a first ECU, a vehicle-mounted storage battery, a second ECU separately connected to the first ECU and the vehicle-mounted storage battery, and a microphone connected to the second ECU. The microphone is embedded on a door handle on one side of the driving position, and is used for obtaining voiceprint information. The second ECU is used for comparing the voiceprint information with a pre-entered voiceprint sample of a main driver, determining whether the voiceprint information is the main driver's, monitoring the electronic start status of a vehicle when the voiceprint information is the main driver's, and notifying the first ECU to control, according to preference information of the main driver, a device corresponding to the preference information of the main driver when monitoring that the vehicle enters an ACC or one-button start mode.

Abstract: A downhole traction system includes a driving system and a downhole wheeled tractor. The driving system is connected with the downhole wheeled tractor; the downhole wheeled tractor comprises a tractor body, a power unit and a plurality of traction units; the plurality of traction units are arranged along the extension direction of the tractor body; each of the traction units comprises a driving arm, a supporting arm, a supporting wheel, a driving assembly and a supporting assembly; the driving arm and the supporting arm are movably connected with the tractor body; and the supporting wheel is connected with the driving arm and the supporting arm. When the supporting assembly drives the supporting arm to extend along the radial direction of the tractor body under the hydraulic drive action of the hydraulic power unit, the supporting wheel can be abutted against the well wall.

Abstract: A thermoplastic polyurethane precursor that can be used to prepare a polyurethane having a low initial yellowness index, high yellowing resistance, high thermal oxidative aging resistance, high hydrolysis resistance, and low fisheye.

Abstract: A communication method and a communication apparatus, wherein the method includes: A first device determines path parameter group search range information and first information, where the first information indicates K path parameter groups, and K is an integer greater than 0; and the first device sends the path parameter group search range information and the first information to a second device, where the path parameter group search range information is used to correct the K path parameter groups, and K corrected path parameter groups are used for channel estimation.

Abstract: A data transmission method and apparatus, and relates to the communication field. In the method, after obtaining a path parameter of each of at least one communication path between a first device and a second device, the first device may demodulate first data based on a pilot and the path parameter of each communication path. In other words, when demodulating the first data, the first device may refer to not only the pilot but also the path parameter of each communication path. The path parameter of each communication path can assist in demodulating the first data. When the path parameter of each communication path assists in demodulating the first data, there may be no need for too many pilots. Therefore, a resource occupied by the pilot can be reduced.

Abstract: An upper dustproof member of a linear guideway includes a connection segment and two floating dustproof segments that are respectively connected to two opposite sides of the connection segment. Each of the two floating dustproofing segments has a carrying bar and at least one rib that is connected to the carrying bar. In each of the two floating dustproofing segments, the carrying bar has two end portions each having a bevel arranged away from the at least one rib. When the bevels of the end portions of the upper dustproof member are respectively inserted into four tolerance slots of two end caps, each of the end portions and the corresponding end cap have a tolerance gap therebetween, so that a slanting surface of each of the bevels abuts against the corresponding tolerance slot, and each of the end portions is deformable toward the corresponding tolerance gap.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a channel state information (CSI) report setting that includes first and second CSI resource settings. In some examples, the first CSI resource setting and the second CSI resource setting may be associated with a set of channel measurement resources of a first serving cell and a set of beam prediction resources of a second serving cell, respectively. The UE may measure channel characteristics of the first serving cell based on a channel measurement resource of the set associated with the first CSI resource setting. Based on the measured first channel characteristics, the UE may predict channel characteristics of the second serving cell for one or more beam prediction resources of the set. As such, the UE may transmit a CSI report including an indication of the predicted channel characteristics according to the CSI report setting.

Abstract: The present invention discloses a flexible sensor detection system for medical care and health, including: an information collection module, which uses a wearable device as a carrier, where flexible sensors are respectively arranged on the wearable device; an information transmission module, configured to wirelessly transmit collected information to an information processing and feedback module; and the information processing and feedback module, configured to perform grading treatment on received data information and feed back a health condition corresponding to the data information to the information transmission module, where the information transmission module compares feedback health condition data with a preset health threshold to determine whether to give an alarm. A heart rate ECG band, a breathing band, a shell temperature band, a blood flow rate band, a blood glucose band, a blood oxygen band, and a deep temperature band of the present invention are provided with the built-in flexible sensors.

Abstract: An environmental imaging method includes: A first device sends first indication information to a second device, where the first indication information indicates a first spatial location at which the second device is to send a measurement signal, and the first spatial location is evenly distributed in an azimuth direction and/or at an azimuth angle; the first device receives an echo signal, where the echo signal is a signal formed by reflecting, by a target, the measurement signal sent by the second device after the measurement signal arrives at the target; and the first device performs imaging on the target based on the echo signal. The method may be implemented in a system or an apparatus.

Abstract: The present application relates to a silicone oil-based immersion coolant for an electronic component. The silicone oil-based immersion coolant for an electronic component includes a base oil and an additive. The base oil includes a low-viscosity silicone oil. The additive includes a silicone oil diluent and a thermally conductive inorganic filler. The viscosity of the low-viscosity silicone oil is less than or equal to 1000 cSt. The thermally conductive inorganic filler is an insulating filler. Based on the mass of the immersion coolant, a mass percentage content of the base oil is in a range from 70% to 85%, a mass percentage content of the silicone oil diluent is in a range from 10% to 20%, and a mass percentage content of the thermally conductive inorganic filler is in a range from 5% to 10%.

Abstract: A method for performing robot dynamic path modification using a remote tool center point (RTCP) coordinate frame, for applications such as material dispensing. A processing tool is fixedly mounted in a workcell and the robot holds and moves the workpiece during the processing. The RTCP coordinate frame is defined at the tip of the tool. A nominal processing path on the workpiece is defined, and a prescribed offset distance from the tip of the tool to the workpiece is defined. A sensor measures the actual offset distance from the tool tip to the workpiece. A controller applies the offset in the RTCP coordinate frame and calculates robot motions causing the robot to move the workpiece nominal path past the tool tip at the offset distance. The controller converts the offset from the RTCP frame to a workcell frame, and performs inverse kinematics calculations to generate robot joint motion commands.

Abstract: Embodiments of this application provide a sensing signal sending method, a sensing signal receiving method, and an apparatus. The method includes: A first communication device determines first time domain resource configuration information based on a speed resolution and a maximum unambiguous speed that are related to a target object, and sends a sensing signal to a second communication device at a plurality of sending moments that are on a time domain resource and that are indicated by the first time domain resource configuration information, so that the second communication device calculates a speed of the target object based on the sensing signal.