Abstract: The present disclosure provides an acoustic transduction structure including: a base substrate and at least two acoustic transduction units on the base substrate, wherein vibrating cavities of two adjacent acoustic transduction units are spaced apart from each other in a direction parallel to a plane where the base substrate is located, and the at least two acoustic transduction units include: a central acoustic transduction unit and at least one annular acoustic transduction unit around the central acoustic transduction unit. The present disclosure also provides a method for manufacturing the acoustic transduction structure and an acoustic transducer.

Abstract: Provided is an antenna unit, including a first substrate and a second substrate that are oppositely disposed, a liquid crystal layer located between the first substrate and the second substrate, and a third substrate located on a side of the second substrate away from the liquid crystal layer. The first substrate includes a first base substrate and a radiation unit layer. The second substrate includes a second base substrate and a ground layer. The radiation unit layer and the ground layer face the liquid crystal layer. The third substrate includes a third base substrate and a feed structure layer, wherein the feed structure layer is located on a side of the third base substrate away from the second substrate.

Abstract: The present disclosure provides a microfluidic device and a manufacturing method therefor, and a method for detecting the number of biomolecules and a system for detecting the number of biomolecules. The microfluidic device includes a glass substrate; a plurality of first metal strips formed on the glass substrate; a photoresist covering the plurality of first metal strips; a fluid cavity formed in the photoresist; a plurality of second metal strips formed on the photoresist, wherein a head end of one first metal strip and a tail end of the other first metal strip in any adjacent two first metal strips are electrically coupled through a head end and a tail end of one second metal strip between the two first metal strips, so that the plurality of first metal strips and the plurality of second metal strips form a hollow inductor structure around the fluid cavity.

Abstract: A knowledge graph updating method, an apparatus, an electronic device, a storage medium and a program thereof, relates to the field of computer technology. The method includes: receiving an updating request of a technical knowledge graph, the updating request includes: a technical-event node of the technical knowledge graph; extracting historical event information corresponding to the technical-event node from the technical knowledge graph; and updating event information of the technical-event node after a current time by using a target-technical-event prediction model; wherein, the target-technical-event prediction model is obtained by training a technical-event prediction model with the historical event information.

Abstract: A miniature smart lock comprises a lock shell, and a magnetic rod, a push head, a bolt, a V-shaped push rod, an anti-prising guide slot, and a positioning guide pin, which are mounted in the lock shell, wherein a magnetic coil is mounted surrounding an outer portion of the magnetic rod; a magnetic rod spring is mounted on the magnetic rod on the left side of the magnetic coil; the push head is mounted at the right end of the magnetic rod; the V-shaped push rod is connected to the right end of the push head via a V-shaped push rod connection pin; and the V-shaped push rod is movably connected to the bolt via an anti-prising pin.

Abstract: A ceramic heating element is disclosed, including: a flat or needle-shaped ceramic housing, a support bracket sleeved in the ceramic housing, and a heating wire evenly wound on the support bracket. An interior of the support bracket is a hollow structure. An electronic cigarette is further disclosed, including the ceramic heating element.

Abstract: The present disclosure provides a display substrate and a manufacturing method thereof, and a display device. The display substrate includes a plurality of pixel regions, each of the pixel regions including a display region provided with a pixel electrode and a driving region provided with a pixel circuit. The pixel circuit includes at least one pixel transistor having a first electrode and a second electrode which are coupled to an active layer of the at least one pixel transistor through connection vias, respectively. The driving region is further provided with a first plate of a storage capacitor, the first plate is insulated from and overlapped with the first electrode and the second electrode of the pixel transistor in a direction perpendicular to the display substrate, and the first plate is provided with openings at positions corresponding to at least some of the connection vias.

Abstract: The present disclosure provides an antenna and a communication device, the antenna includes a dielectric substrate, a first radiating element, a second radiating element and a switching element, the second radiating element surrounds the first radiating element, the second radiating element is of an open-loop structure, at least one first groove is provided in the first radiating element, each switching element corresponds to one first groove, the switching element includes a membrane bridge and a signal electrode, the signal electrode is arranged on the dielectric substrate, coupled to the second radiating element, and insulated from the first radiating element, the membrane bridge is arranged on a side of the first radiating element away from the dielectric substrate, each membrane bridge crosses over one first groove, and at least part of the signal electrode is located in a space defined by the membrane bridge and the first groove.

Abstract: An electric pedal for an automobile comprises a driving support, a driving mechanism, and a pedal. The driving support and driving mechanism are both mounted on the same side of a bottom of an automobile body. The driving support comprises a first transmission mechanism and a first connecting rod, a front end of the first connecting rod is fixedly connected to the pedal, and the first transmission mechanism drives the first connecting rod to be extended and retracted. The driving shaft of the driving mechanism is directly fixedly connected to the first transmission mechanism and drives the first transmission mechanism to be extended and retracted, such that the first connecting rod is extended and retracted.

Abstract: The present disclosure provides a phase shifter and an antenna, and relates to the field of communication technology. The phase shifter provided by the embodiment of the present disclosure is divided into a first feeding region, a second feeding region and a phase-shift region. The phase shifter includes: a first substrate and a second substrate provided opposite to each other, a dielectric layer provided between the first substrate and the second substrate, and a first feeding structure and a second feeding structure. The first feeding structure is electrically coupled to one end of the signal line, and the second feeding structure is electrically coupled to the other end of the signal line. The first feeding structure is located in the first feeding region; and the second feeding structure is located in the second feeding region. Recesses are formed in the first base substrate and/or in the second base substrate.

Abstract: The present invention relates to the technical field of polymer composite materials, and specifically, to a shear thickening composite material, a preparation method therefor, and use thereof. According to the present invention, a solid composite material with shear thickening performance is prepared by limiting the types and contents of all components in raw materials. This composite material is kept soft and has a proper elastic shape under a normal state, and can be rapidly subjected to strain enhancement through local density increase when being rapidly and violently impacted or extruded, so that a significant shear thickening phenomenon is presented, namely this material is a hard solid when being impacted by an external force, then this material has an increasing strength with the increase of the external force, and this material restores to an original relaxed, soft, and elastic state when the external force is removed.

Abstract: A display substrate includes a base substrate, a voltage line arranged at a peripheral region of the base substrate, an encapsulation layer arranged at a side of the voltage line away from the base substrate, and a plurality of pixel units arranged at a display region of the base substrate. The encapsulation layer is arranged at a part of the display region and the peripheral region of the base substrate. The display substrate further includes an antenna arranged at a side of the encapsulation layer away from the base substrate, the antenna is a grid-like antenna, the voltage line is provided with a hollowed-out portion, and an orthogonal projection of at least a part of an end of the antenna onto the base substrate is located within an orthogonal projection of the hollowed-out portion onto the base substrate.

Abstract: The present disclosure provides a thin film sensor, a thin film sensor array and an electronic device. The thin film sensor has a functional area and a non-functional area surrounding the functional area, and includes: a dielectric substrate having a first surface and a second surface which are oppositely arranged; a first conductive layer located on the first surface of the dielectric substrate and including a first conductive structure arranged in the functional area; a second conductive layer located on the second surface of the dielectric substrate; a first light-shielding layer located on the first surface of the dielectric substrate, the first light-shielding layer includes a first light-shielding structure at least arranged in the non-functional area, the first light-shielding structure has the same pattern as the first conductive structure.

Abstract: A compound composition for improving bone health and preparation and application thereof are provided. The compound composition is prepared by combining a traditional Chinese medicine extract with chicken cartilage collagen, magnesium, vitamin K2 and vitamin D3. The compound composition overcomes the food safety risk of the existing osteoporosis preventive drugs by adding the traditional Chinese medicine extract for improving osteoporosis and promoting bone health. And the compound composition disclosed can be used as a dietary supplement or health food raw material for preventing or treating osteoporosis. Therefore, the compound composition disclosed is suitable for promotion and application.

Abstract: Provided is a method for acquiring labeled data, including acquiring a 3D-3D registration sample, wherein the 3D-3D registration sample includes a sample 3D image, a reference 3D image and 3D-3D registration data, and the 3D-3D registration data includes correspondence data between the sample 3D image and the reference 3D image; generating at least one dual-2D-image based on the sample 3D image, wherein each dual-2D-image is a combination of 2D projection images of the sample 3D image in two different directions; and generating 2D-3D registration data corresponding to each dual-2D-image based on the 3D-3D registration data, wherein each 2D-3D registration data includes correspondence data between the dual-2D-image and the reference 3D image.

Abstract: An antenna includes: a dielectric layer having first and second surfaces opposite to each other; a radiating layer on the first surface, and having therein a slit; a first shielding layer on the second surface, and being electrically connected to the radiating layer; a first insulating layer on an upper side of the radiating layer; and a switch unit on an upper side of the first insulating layer, and corresponding to the slit. Each switch unit includes: a first electrode, a second insulating layer, a connecting portion, and a second electrode on the first insulating layer sequentially. Orthogonal projections of the first and second electrodes on the dielectric layer overlap each other. The connecting portion is connected to the second electrode to form a gap between the first and second electrodes. Orthogonal projections of the second electrode and a corresponding slit on the dielectric layer overlap each other.