Abstract: A system for dynamically adjusting coupling coefficients of a non-contact transmission magnetic mechanism, wherein a power supply end is connected to a non-contact transmission electric energy conversion module and a magnetic field regulation electric conversion module respectively by means of an input power consumption measurement unit, the non-contact transmission electric energy conversion module is connected to a transmitting coil by means of a tuning wave-blocking circuit, a receiving coil is provided corresponding to the transmitting coil, the receiving coil is provided on the wave-blocking circuit, the wave-blocking circuit is connected to a load end by means of a rectifying and voltage stabilizing circuit and an output power consumption measurement module, signal loading and extraction modules having a controller and a signal modulation and demodulation module are connected in parallel to two ends of the transmitting coil and the receiving coil

Abstract: A jet flow adjustment method for rotary steerable downhole release relates to a technical field of downhole drilling equipment for oil wells, which includes steps of: defining a diversion ratio p of a jet nozzle (2) by a ground control system according to a cleaning requirement of a cuttings bed; and sending the diversion ratio p of the jet nozzle (2) to a control unit of a downhole rotary steerable system; and determining an opening area s of the jet nozzle (2) by the control unit of the downhole rotary steerable system according to the diversion ratio p of the jet nozzle (2) and an equivalent channel area S of a drilling tool, wherein a calculation formula is: s=p*S/(1?p); controlling an adjustable bypass valve (3) by the control unit of the downhole rotary steerable system according to the calculated opening area s of the jet nozzle (2), so as to control an overlapping area between sector holes (9) of a rotor end (7) and a stator end (8), thereby opening the jet nozzle (2) for release.

Abstract: This application provides a power supply system. The power supply system includes a first device and a second device. The first device may be one of a control device and a film-and-television light, and the second device may be the other of the control device and the film-and-television light. The first device includes a first housing, a first coupler socket, a power supply circuit and a first set of contacts. The second device includes a second housing, a second coupler socket, a power receiving circuit, and a second set of contacts. In the power supply system. The power supply circuit in the first device and the power receiving circuit in the second device can be electrically connected through the first set of contacts in stalled on the first coupler socket and the second set of contacts installed on the second coupler socket.

Abstract: The present application relates to the technical field of electronic circuits, and provides a charge circuit, a control box and a luminaire. The charge circuit includes a control circuit and at least one constant current charge circuit. The constant current charge circuit is electrically connected to the rechargeable battery. The control circuit is used to obtain the specification information of the rechargeable battery, and configure the corresponding charging parameters to be sent to the corresponding constant current charge circuit, so as to charge the rechargeable battery through the constant current charge circuit.

Abstract: A method for seismic exploration uses visco-acoustic FWI to model velocity and quality factor Q for an explored subsurface formation. The method employs frequency-dependent velocity to reduce cross-talk between Q and velocity and may be used for both isotropic and anisotropic media.

Abstract: A PERC solar cell selective emitter includes a silicon wafer, first and second doped regions and a laser doped region with doped layers. First doped regions are located between the doped regions of each doped layer, and each second doped region is located between two adjacent doped layers. The PERC solar cell includes the selective emitter, a front anti-reflective layer on the surface of a front passivation layer, and a positive electrode. The positive electrode includes first silver paste layers on the surfaces of the laser doped regions and second silver paste layers on the surface of the front anti-reflective layer corresponding to the first doped regions. The second silver paste layers are in electrical contact with the first silver paste layers. Damage of laser to silicon wafers is reduced, compounding in silver paste areas is reduced, an open circuit voltage is increased, and battery efficiency is improved.

Abstract: A pixel structure includes a plurality of first sub-pixels arranged in a first direction and a second direction. A maximum dimension of at least one first sub-pixel in a first direction is less than a first set value, and a maximum dimension of the at least one first sub-pixel in a second direction is greater than a second set value. The first set value is a maximum dimension of a set sub-pixel in the first direction, and the second set value is a maximum dimension of the set sub-pixel in the second direction. The first sub-pixel has an area equal to an area of the set sub-pixel.

Abstract: Disclosed are a heat dissipation device (140) and a lighting device (10). The heat dissipation device (140) comprises a substrate (141), a plurality of fins (1431) and at least one airflow generating device (145), wherein the plurality of fins (1431) are arranged on the substrate (141) at certain intervals and are connected to the substrate (141); and the at least one airflow generating device (145) is arranged at the ends of the plurality of fins (1431) away from the substrate (141), and an airflow generated by the airflow generating device (145) flows through at least some gaps of the plurality of fins (1431) in the direction of the substrate (141) and is jointly guided by the substrate (141) and the plurality of fins (1431) to be diffused.

Abstract: The present disclosure provides a word mining method and apparatus, an electronic device and a readable storage medium, and relates to the field of artificial intelligence technologies, such as natural language processing technologies, deep learning technologies, cloud service technologies, or the like.

Abstract: The present application discloses a method, an apparatus, a device, and a storage medium for intention recommendation, which relates to the field of big data, artificial intelligence, intelligent search, information flow and deep learning technologies in the field of computer technologies. A specific implementation scheme includes: receiving an intention query request carrying an intention keyword and a user identification, determining a first recommendation list according to the intention keyword and a pre-configured intention repository, where the intention repository includes at least one tree-shaped intention set, and each tree-shaped intention set includes at least one graded intention, processing intentions in the first recommendation list by using intention strategy information corresponding to the user identification to obtain a target recommendation list and output it.

Abstract: A device for isolating vibrations includes an ion trap, a cryocooler, a primary chamber, a secondary chamber, a vacuum ion pump, a heat exchanger, a sample chamber, a support part, a connector, a heat conduction part, a first platform, a second platform, and a flexible connecting part. The primary chamber, the secondary chamber, and the vacuum ion pump are fixedly disposed on the first platform. The connector is a hollow structure disposed between the primary chamber and the secondary chamber. The primary chamber communicates with the secondary chamber via the hollow structure thereby forming an airtight chamber. The vacuum ion pump is connected to the primary chamber via a five-way flange. The support part is fixed on the second platform. The cryocooler is fixed on the support part. The cryocooler includes a cold head and a machine head. The cold head is suspended in the primary chamber.

Abstract: An aftertreatment system (100) includes a decomposition chamber (108), a reductant pump (120), a first dosing module (110), a second dosing module (112), and a controller (133). The first dosing module (110) is coupled to the decomposition chamber (108) and configured to receive reductant from the reductant pump (120). The second dosing module (112) is coupled to the decomposition chamber (108) and configured to receive reductant from the reductant pump (120) independent of the first dosing module (110). The controller (133) is communicatively coupled to the first dosing module (110) and the second dosing module (112). The controller (133) is configured to independently control a first volumetric flow rate of reductant provided from the first dosing module (110) into the decomposition chamber (108) and a second volumetric flow rate of reductant provided from the second dosing module (112) into the decomposition chamber (108).

Abstract: The present disclosure discloses a query method, an apparatus, an electronic device, and a storage medium, and relates to the technical field of spatio-temporal big data in big data technologies. The specific implementation scheme is as follows: receiving a query request sent by a terminal device, where the query request is used to request to query dynamic association relationships of a target entity and includes an identifier of the target entity and query starting and ending time; determining at least one time bucket to be queried in a query database according to the query starting and ending time, where each time bucket stores the dynamic association relationships of the target entity in a time period corresponding to the time bucket; and querying the dynamic association relationships of the target entity in the at least one time bucket according to the identifier of the target entity.

Abstract: The present application belongs to the technical field of solar cells, and relates to a p-type bifacial solar cell with partial rear surface field passivation and a preparation method therefor. The solar cell includes a p-type silicon substrate. At the bottom portion of the p-type silicon substrate are arranged, from top to bottom, a silicon oxide passivation layer, an aluminum oxide passivation layer and a rear side silicon nitride anti-reflection layer. A plurality of boron source-doped layers are embedded in the bottom portion of the p-type silicon substrate. Connected to the bottom of each of the boron source-doped layers is a rear side metal electrode layer, which penetrates each of the silicon oxide passivation layer, the aluminum oxide passivation layer and the rear side silicon nitride anti-reflection layer.

Abstract: The disclosure provides a string trimmer. The string trimmer includes a protective shield, a first motor, a blade and a fan. The first motor is arranged on one side of the protective shield, and a first rotation shaft of the first motor penetrates the protective shield to the other side of the protective shield. The blade is arranged on the other side of the protective shield, and the blade is connected with the first rotation shaft. The fan is arranged on the same side as the first motor, and the fan is mounted on the protective shield through a second rotation shaft. Wherein, a rotation speed ratio between the second rotation shaft and the first rotation shaft ranges from 0.5 to 4. With the string trimmer of the disclosure, the rotation speed of the blade and the fan are different.

Abstract: A photography lamp includes a housing assembly, a heat dissipation assembly, and a light source assembly. The housing assembly includes a lamp barrel and a rear cover, a main air inlet is disposed on the rear cover, and an air outlet grille is disposed on a side wall of the lamp barrel close to the light outlet end. The heat dissipation assembly includes a fan, the air outlet side of the fan is spaced from the light source assembly, a spacing is arranged between the air outlet side of the fan and the light source assembly, and the spacing is always facing the air outlet grille in the direction of the central axis of the lamp barrel. The photography lamp can improve heat dissipation efficiency of photographic lighting fixtures.

Abstract: A seismic exploration method includes performing a true amplitude PSDM based on an initial velocity model of a subsurface formation to obtain a reflectivity model, and then a Born modeling using the reflectivity model to generate synthetic data. An image-based reflection full waveform inversion is applied to a cost function of differences between seismic data acquired over the subsurface formation and the synthetic data to update the initial velocity model. The updated velocity model enables exploring the presence of and/or assisting in the extraction of natural resources from the subsurface formation.

Abstract: The present application discloses a microphone, including: a housing; at least two sound-pickup members respectively disposed on the housing; a control circuit board disposed in the housing and in electrical connection to the at least two sound-pickup members respectively; and a switch member configured for triggering the control circuit board to select one or more of the sound-pickup members for collecting an external sound source. The present application addresses the shortcoming that it is necessary to change the direction of the microphone according to the needs of the scene, realizes the flexible selection and configuration of multiple sound-pickup members, and enriches the use scene of the operator. Once the recording site is set up, recordings with different requirements can be realized by switching circuit, so as to reduce the movement of recording equipment, which is suitable for recording equipment such as a camera and a camcorder.

Abstract: A microphone is provided, which includes: a housing; at least one sound-pickup member disposed on the housing and configured to collect an external sound source; and a control circuit board disposed in the housing and in electrical connection to the at least one sound-pickup member; wherein the control circuit board comprises at least one input jack, and the at least one input jack is configured to operably connect with an external plug to collect other sound source different with the external sound source. In a detailed application, when the at least one sound-pickup member comprises at least two sound-pickup members, the control circuit board is configured, once a selection module of the control circuit board is triggered, to selectively output external sound sources collected by one or more of the at least two sound-pickup members and/or the other sound source collected by the at least one input jack.

Abstract: An aftertreatment system (100) includes a decomposition chamber (108), a reductant pump (120), a first dosing module (110), a second dosing module (112), and a controller (133). The first dosing module (110) is coupled to the decomposition chamber (108) and configured to receive reductant from the reductant pump (120). The second dosing module (112) is coupled to the decomposition chamber (108) and configured to receive reductant from the reductant pump (120) independent of the first dosing module (110). The controller (133) is communicatively coupled to the first dosing module (110) and the second dosing module (112). The controller (133) is configured to independently control a first volumetric flow rate of reductant provided from the first dosing module (110) into the decomposition chamber (108) and a second volumetric flow rate of reductant provided from the second dosing module (112) into the decomposition chamber (108).