Abstract: A driving circuit for driving a light source and a projection device are provided. The driving circuit includes a power converter, a detection circuit, and a control circuit. The power converter provides a driving power to the light source. The detection circuit provides a feedback signal according to a current value of the light source. The control circuit receives an operation command and the feedback signal. The control circuit determines whether the driving circuit enters a light-load state according to at least one of the operation command and the feedback signal. When the driving circuit is determined to enter the light-load state, the control circuit controls the power converter to decrease a current value of the driving power and controls the power converter to increase a switching frequency of the driving power. The driving circuit and the projection device may prevent the light source from flickering under the light-load state.

Abstract: The disclosure discloses a point-of-interest recommendation method based on a temporal knowledge graph. Based on the historical behavior trajectory of the user and multimodal information, the disclosure constructs a dynamic temporal knowledge graph and a static group knowledge graph, which are used to learn interest preferences of the user that change over time and stable features that do not change over time, respectively. At the same time, the disclosure uses deep learning methods to build a point-of-interest recommendation model, which can extract a point-of-interest fusion feature representation and a user fusion feature representation from the two knowledge graphs in combination with a user review sentiment embedding sequence to accurately predict a point of interest most likely to be visited by the target user at a next moment. The disclosure has the characteristics of high precision and strong scalability, and can provide support for personalized user behavior trajectory prediction.

Abstract: A cardboard conveyor device forms sub negative pressure regions communicative to a main negative pressure region by using wind shield structures of a plate body structure, thus saving power consumption of an aspirator. The plate body structure is for example formed by three plate bodies, the plate body of a middle layer has air holes, the plate body of an upper layer has first interval spaces penetrating the plate body of the upper layer, and the plate body of a lower layer has second interval spaces penetrating the plate body of the lower layer. Each of the first interval spaces is communicative to the corresponding second interval space via the corresponding air holes, and the second interval spaces are communicative to the main negative pressure region. Thus, the sub negative pressure regions can provide a negative pressure to the cardboard being conveyed.

Abstract: This application discloses a multi-device connection establishment method and a device. The method includes: A first device sends a first message, where the first message is used to discover another device; the first device receives one or more second messages from one or more devices, where the second message is a response message for the first message; the first device determines, based on the one or more second messages, to establish a connection to a second device in the one or more devices; and the first device negotiates, with the second device, link information used to establish direct communication between the first device and the second device, and establishes a direct communication connection to the second device based on the link information. After a communication connection is established between devices based on discovery, link information is negotiated, and direct communication is established based on the link information, to form a system.

Abstract: A preparation method of a misch-metal permanent magnetic material based on sintering and multi-step diffusion is provided. A sintered substrate magnet is prepared by induction melting, strip casting, hydrogen decrepitation, jet milling, magnetic alignment, isostatic pressing and sintering. A first diffusion source and a second diffusion source are prepared, where the first diffusion source is a light rare-earth metal or its alloy, and the second diffusion source is a light-heavy rare-earth combination or its alloy. The sintered substrate magnet is sequentially subjected to a first vacuum diffusion with the first diffusion source and a second vacuum diffusion with the second diffusion source. The resultant product is subjected to low-temperature tempering to give the desired misch-metal permanent magnetic material.

Abstract: A slide for a vehicle seat, comprising a female rail having at least one substantially planar wall, a male rail also having at least one substantially planar wall, mounted to slide relative to the female rail, the female rail surrounding the male rail with the substantially planar wall of the female rail facing the substantially planar wall of the male rail, and a position sensor integral with the substantially planar wall of the male rail and provided between the substantially planar wall of the male rail and the substantially planar wall of the female rail, protruding from the substantially planar wall of the male rail towards the substantially planar wall of the female rail.

Abstract: A method for improving corrosion resistance of a high abundance rare earth permanent magnet by high temperature oxidation is provided. By the oxidation at 700˜1000° C., a rare earth oxide film grows in-situ on the surface, which can greatly improve the corrosion resistance of the high abundance rare earth permanent magnet. The method makes full use of phase formation rule and diffusion kinetic behavior of high abundance rare earth elements La/Ce/Y, which is different from other rare earth elements Nd/Pr/Dy/Tb. The method grows the rare earth oxide film in situ with strong adhesion to the matrix, which can not only greatly improve the corrosion resistance of the magnet, but also improve the magnetic and mechanical properties. The method has advantages of green environmental protection, long service life and simple process, and can be popularized and applied in large quantities.

Abstract: A method for improving the corrosion resistance of NdFeB materials is provided. The method includes in-situ growing a layer of oxide, nitride, or oxynitride on the surface of NdFeB magnet correspondingly by performing at least one of an oxidation treatment and a nitridation treatment at low temperature in a range of 200˜400° C., thereby significantly improving the corrosion resistance of the magnet. The method is simple to operate, low-cost, green, safe, and efficient. Depending on the parameters of the low-temperature oxidation and/or nitridation treatment, the thickness of the oxide, nitride, or oxynitride layer is adjustable from 10 nm to 100 ?m, which can improve the corrosion resistance of the magnet while maintaining excellent magnetic properties. Moreover, the thin surface layer is in-situ grown on the NdFeB substrate, which is strong and stable over a long service period and can be applied for mass production.

Abstract: A slide for a vehicle seat, comprising a female rail having at least one vertical side wall, a male rail also having at least one vertical side wall, mounted to slide relative to the female rail, the female rail surrounding the male rail with the vertical side wall of the female rail facing the vertical side wall of the male rail, a position sensor comprising a means for measuring the surrounding magnetic field fixed to the vertical side wall of the male rail by means of a spring member, and arranged between the substantially planar wall of the male rail and the substantially planar wall of the female rail and oriented towards the substantially planar wall of the female rail.

Abstract: An assembled cabinet and power connection boards thereof, in which side board assemblies of the assembled cabinet are stacked in a way that upper power connectors of a power connection board of a lower side board assembly among two adjacent stacked up side board assemblies are electrically connected with lower power connectors of a power connection board of the an upper side board assembly among the two adjacent stacked up side board assemblies, so as to preserve the versatility and flexibility of the installation of the assembled cabinet while allowing stable power supply to the electronic locks of the assembled cabinet.

Abstract: The present invention discloses a combined oxygen, nitrogen and hydrogen joint determination device and method based on thermal conductivity-infrared technique. In the device, a melting and extraction system comprises a carrier gas introduction pipeline, a chamber valve, an impulse furnace and a dust filter; an analytical gas transmission system comprises a flush valve, a bypass valve, a mass flowmeter and a first switching valve; a signal detection system comprises an infrared cell, an analysis purification reagent tube and a thermal conductivity cell; and a signal analysis system comprises a controller and a processor. The present invention realizes different joint determination modes by switching different gas paths, which can meet different determination requirements of different users.

Abstract: An electronic lock for an assembled cabinet, including a lock shell, a locking and unlocking assembly mounted on the lock shell, an electronic driving device, a wireless communication device, a control circuit board, and a power supply. The control circuit board is electrically connected to the electronic driving device, the wireless communication device, and the power supply. The electronic driving device transmits motion to the locking and unlocking assembly. The electronic lock is adaptable to free combination of an assembled cabinet to provide easy installation and convenient use.

Abstract: A cardboard conveyor device forms sub negative pressure regions communicative to a main negative pressure region by using wind shield structures of a plate body structure, thus saving power consumption of an aspirator. The plate body structure is for example formed by three plate bodies, the plate body of a middle layer has air holes, the plate body of an upper layer has first interval spaces penetrating the plate body of the upper layer, and the plate body of a lower layer has second interval spaces penetrating the plate body of the lower layer. Each of the first interval spaces is communicative to the corresponding second interval space via the corresponding air holes, and the second interval spaces are communicative to the main negative pressure region. Thus, the sub negative pressure regions can provide a negative pressure to the cardboard being conveyed.

Abstract: This application relates to a method and an apparatus for controlling a sound receiving device based on a dual-mode audio three-dimensional code and a method and an apparatus for parsing a control signal of a sound receiving device based on a dual-mode audio three-dimensional code. The method includes: receiving an operation instruction and encoding the operation instruction as a digital vector; obtaining a first audio three-dimensional code corresponding to a preset speech signal, and encoding the digital vector into the first audio three-dimensional code to obtain a second audio three-dimensional code; and converting the second audio three-dimensional code into a speech signal and sending the speech signal to a sound receiving device. In the method, operation convenience can be improved, and an instruction operation can be performed without arrangement of any additional module.

Abstract: An automotive oil-filter assembly includes a main body made from aluminum by high-pressure die casting, where a filter element mounting base and a radiator mounting position are arranged on the main body; a filter element is inserted into the filter element mounting base, and a radiator is mounted at the radiator mounting position; a main body cap is mounted on the filter element mounting base; a bypass valve is arranged at an end, adjacent to the main body cap, of the filter element and communicates with the filter element; an oil inlet of the main body is located at one end of the main body and communicates with the filter element mounting base; and an oil inlet of the radiator, an oil outlet of the radiator, a coolant inlet of the radiator, and a coolant outlet of the radiator are located at the radiator mounting position.

Abstract: An automotive oil-filter assembly includes a main body made from aluminum by high-pressure die casting, where a filter element mounting base and a radiator mounting position are arranged on the main body; a filter element is inserted into the filter element mounting base, and a radiator is mounted at the radiator mounting position; a main body cap is mounted on the filter element mounting base; a bypass valve is arranged at an end, adjacent to the main body cap, of the filter element and communicates with the filter element; an oil inlet of the main body is located at one end of the main body and communicates with the filter element mounting base; and an oil inlet of the radiator, an oil outlet of the radiator, a coolant inlet of the radiator, and a coolant outlet of the radiator are located at the radiator mounting position.

Abstract: A method for improving corrosion resistance of a high abundance rare earth permanent magnet by high temperature oxidation is provided. By the oxidation at 700 ~ 1000° C., a rare earth oxide film grows in-situ on the surface, which can greatly improve the corrosion resistance of the high abundance rare earth permanent magnet. The method makes full use of phase formation rule and diffusion kinetic behavior of high abundance rare earth elements La/Ce/Y, which is different from other rare earth elements Nd/Pr/Dy/Tb. The method grows the rare earth oxide film in situ with strong adhesion to the matrix, which can not only greatly improve the corrosion resistance of the magnet, but also improve the magnetic and mechanical properties. The method has advantages of green environmental protection, long service life and simple process, and can be popularized and applied in large quantities.

Abstract: A method for improving the corrosion resistance of NdFeB materials is provided. The method includes in-situ growing a layer of oxide, nitride, or oxynitride on the surface of NdFeB magnet correspondingly by performing at least one of an oxidation treatment and a nitridation treatment at low temperature in a range of 200˜400° C., thereby significantly improving the corrosion resistance of the magnet. The method is simple to operate, low-cost, green, safe, and efficient. Depending on the parameters of the low-temperature oxidation and/or nitridation treatment, the thickness of the oxide, nitride, or oxynitride layer is adjustable from 10 nm to 100 ?m, which can improve the corrosion resistance of the magnet while maintaining excellent magnetic properties. Moreover, the thin surface layer is in-situ grown on the NdFeB substrate, which is strong and stable over a long service period and can be applied for mass production.

Abstract: A medicated thread manufacturing system and associated method includes first and second slideways, a thread clamping apparatus and a medicine spraying apparatus slidably arranged on the first slideway, and a thread winding apparatus slidably arranged on the second slideway. The clamping apparatus clamps two ends of a to-be-processed medicated thread, straightens the thread and twists the thread in the straightened state into a single-strand rope state. The spraying apparatus sprays a medicine towards a surface layer of the thread in the straightened state. The winding apparatus abuts a center position of the thread in the single-strand rope state, pulls and folds the thread, and rotates the thread such that the thread winds and extends from middle to two ends to be twisted in a double-strand rope state. A control apparatus is in signal connection and/or electrical connection to the clamping apparatus, the spraying apparatus and the winding apparatus.

Abstract: A WI-FI hotspot recommendation method includes scanning a WI-FI hotspot, determining an Internet-accessible hotspot in WI-FI hotspots that are obtained by means of scanning, determining network quality obtained when the terminal accesses a network by using the Internet-accessible hotspot, and displaying an identifier of the Internet-accessible hotspot and an identifier that indicates the network quality obtained when the terminal accesses the network by using the Internet-accessible hotspot.