Abstract: An explosion-proof spiral exhaust pressure relief device for mine is provided, relating to the technical field of explosion-proof pressure relief devices. A main structure of the explosion-proof spiral exhaust pressure relief device for mine includes an explosion-proof pressure relief housing and a first explosion-proof pressure relief inner core. An exhaust cavity is arranged inside the explosion-proof pressure relief housing in an axial direction. The exhaust cavity is open at one end of the explosion-proof pressure relief housing, and the other end of the explosion-proof pressure relief housing is provided with pressure relief holes communicating with the exhaust cavity. The first explosion-proof pressure relief inner core is arranged in the exhaust cavity. An outer wall of the first explosion-proof pressure relief inner core is provided with at least one explosion-proof spiral pressure relief channel.

Abstract: The present disclosure provides Aa power circuit and a power system. The circuit comprises a first power supply capacitor, a first bridge output unit, a second power supply capacitor, and a second bridge output unit. The first bridge output unit and the second bridge output unit each includes two bridge arms, each of which includes at least one switch transistor, and the first bridge output unit is connected to an output terminal of the second bridge output unit. The power supply capacitor is configured to supply a input voltage to the bridge output unit. The bridge output unit is configured to adjust the input voltage through the at least one switch transistor on the bridge arm, and output the adjusted input voltage as a output voltage.

Abstract: A planter suitable for block seeds that relates to agricultural seeding machinery includes a frame, a fertilizing tank, a fertilizing box, a seeding mechanism, a control mechanism, a seed box, a ridging mechanism, land wheels, a seeding furrower, a fertilizing furrower, a seed-clearing mechanism, and a replanting mechanism. The fertilizing furrower, the fertilizing tank, the fertilizing box, the seeding furrower, the land wheels, the seeding mechanism, the control mechanism, the seed box, and the ridging mechanism are mounted in turn from one end to an opposite end of the frame. A photoelectric sensor of an active infrared intrusion detector is adopted to dynamically monitor the presence of seed potatoes on a seed-discharge spoon in a conveying process. Seeds are replanted with the control mechanism when the seeds are sowed with an empty spoon.

Abstract: A method and apparatus for controlling multicast frame message forwarding, a communication device, and a computer-readable medium are provided. The method includes: acquiring a multicast frame message; and inhibiting forwarding the multicast frame message, in response to a number of previously forwarded duplicate messages of the multicast frame message within a predetermined time period reaching a predetermined threshold.

Abstract: Etch-free optical metasurface (free space optical resonator) supporting million-quality-factor resonances at visible wavelengths in free space and associated systems and methods are described. In an embodiment, a free space optical resonator includes: a low refractive index layer; a high refractive index layer having a wide band gap; and a low refractive index resist layer. The high refractive index layer is disposed between the low refractive index layer and the resist layer. The resist layer includes a 2-D subwavelength periodic pattern of openings. The low refractive index layer, the high refractive index layer and the low refractive index resist layer are arranged as a vertical stack. The optical resonator is lossless at visible wavelengths of light.

Abstract: A method for generating an extreme ultraviolet light, an extreme ultraviolet light source assembly, and an optical system are provided. With the method for generating an extreme ultraviolet light, a plasma is generated by a magnetic confinement device, if the plasma meets a preset injection condition, a heavy metal injection device is controlled to inject a designated heavy metal into the magnetic confinement device, so that the designated heavy metal interacts with the plasma in the magnetic confinement device to generate an extreme ultraviolet light, and an optical device is controlled to collect the extreme ultraviolet light.

Abstract: Various embodiments relate to magnetically moveable displacement devices or robotic devices. Particular embodiments provide systems and corresponding methods for magnetically moving multiple movable robots relative to one or more working surfaces of respective one or more work bodies, and for moving robots between the one or more work bodies via transfer devices. Robots can carry one or more objects among different locations, manipulate carried objects, and/or interact with their surroundings for particular functionality including but not limited to assembly, packaging, inspection, 3D printing, test, laboratory automation, etc. A mechanical link may be mounted on planar motion units such as said robots.

Abstract: An intelligent cooking method may include acquiring a multi-machine simultaneous cooking instruction, wherein the multi-machine simultaneous cooking instruction is generated according to multi-machine simultaneous cooking time information corresponding to a recipe. The method may include controlling a first intelligent automatic cooker to execute the multi-machine simultaneous cooking instruction, so that the first intelligent automatic cooker executes a cooking operation corresponding to the recipe at time corresponding to the multi-machine simultaneous cooking time information.

Abstract: A method implemented by one or more processors comprises identifying, from data stored in at least one memory, a plurality of prior search queries received by a computing system over a particular prior time period. The method further comprises determining, for each of the prior search queries, from a plurality of search query categories, a search query category associated with the prior search query. The method further comprises identifying a subset of the prior search queries based at least in part on stored user interactions with first prior search results returned, by the computing system, in response to receipt of the subset of prior search queries over the particular prior time period. The method further comprises identifying one or more domains of second prior search results returned, by the computing system, in response to receipt of the subset of prior search queries over the particular prior time period.

Abstract: The present disclosure provides a perfusion system and a cell cultivation perfusion system, the perfusion system comprising: a pressure transfer component, the pressure transfer component including a belt and multiple pressure members disposed on the belt at intervals; a driving device, a driving connection being established between the driving device and the pressure transfer component; and at least one pipeline assembly, the at least one pipeline assembly including at least one pressable pipeline for fluid flow; wherein a press area is formed between the pressure transfer component and each of the at least one pressable pipeline, the multiple pressure members move with the belt, and at least a portion of the multiple pressure members press against the at least one pressable pipeline in the press area.

Abstract: This application relates to an engineered RNA molecule, a DNA molecule encoding the engineered RNA molecule, and use of the engineered RNA molecule. The engineered RNA molecule comprises a Poly(A) tail sequence containing an miRNA binding site. The Poly(A) tail enables the accurate expression of a target gene in an organ, a tissue and/or a cell.

Abstract: An ammonium complex system-based method for separating and purifying lead, zinc, cadmium, and copper, comprising the following steps: a zinc-containing raw material is leached using a leach solution to produce a leached solution; a filtrate and a filter residue are produced by filtration; the filtrate is mixed with metal lead to displace copper, undergoes a solid-liquid separation to produce a first separated liquid, is mixed with metal cadmium to displace lead, undergoes a solid-liquid separation to produce a second separated liquid, is mixed with metal zinc to displace cadmium, and undergoes a solid-liquid separation to produce a third separated liquid; and, the third separated liquid is electrolyzed to produce metal zinc, and an electrolytic solution is returned to the leaching step.

Abstract: An electrode tab structure and a welding tooling are provided in the present disclosure. The electrode tab structure includes multiple electrode tab units stacked and pre-welded together, and the electrode tab structure includes a first end face and a second end face arranged opposite to each other. The first end face of the electrode tab structure is configured to be abutted against a welding head, and the second end face of the electrode tab structure is configured to be abutted against a welding platform. A difference between a highest point and a lowest point of a metallographic section of the first end face in a first direction being H1, a difference between a highest point and a lowest point of a metallographic section of the second end face in the first direction being H2, and H1?H2.

Abstract: A device and method and computer readable medium for resisting downgrade attacks. User equipment includes a memory having instructions stored thereon and a processor configured to execute the instructions stored on the memory to cause the user equipment to perform the following operations: determining a security authentication type when the user equipment is connected to a network device for the first time; and in response to determining that the security authentication type when the user equipment is connected to the network device for the first time is WPA3, applying the only-WPA3 rule; where the only-WPA3 rule only allows the user equipment to use WPA3 to access the network device, and refuses the user equipment to use other security authentication types with lower security than WPA3 to access the network device.

Abstract: Disclosed are a method and system for redundancy switch between two controllers for supplementary damping of a governor, relating to the technical field of control methods. The method includes acquiring a participation condition according to an output result, listing the participation condition in a truth value table and supplementing correlation logic; outputting the correlation logic as an image language, and simplifying the image language; and acquiring switch logic by a simplified image language, and transforming the switch logic into a programming language of the controller. A complex control relation can be decomposed in the disclosure, so that the difficulty can be reduced, and a correct and comprehensive control purpose can be achieved. Moreover, the method has universality.

Abstract: A first transformer includes a first primary winding and a first secondary winding. The first primary winding is coupled to a first phase branch to produce a first waveform. The first secondary winding is serially coupled to a compensation branch. A second transformer includes a second primary winding and a second secondary winding. The second primary winding is coupled to a second phase branch to produce a second waveform. The second secondary winding is serially coupled to the first secondary winding. An output node is coupled to the first phase branch and the second phase branch to provide an output waveform. The output waveform includes the first waveform and the second waveform, and has a transient response based on a first harmonic factor of the first phase branch and a second harmonic factor of the second phase branch.

Abstract: A first primary winding of a first transformer is coupled to a first phase branch to produce a first waveform. A second primary winding of a second transformer is coupled to a second phase branch to produce a second waveform. A first secondary winding of the first transformer and a second secondary winding of the second transformer are serially coupled to a compensation branch. The compensation branch includes a variable inductor having an inductance that corresponds to a threshold current. An output node is coupled to the first phase branch and the second phase branch to provide an output waveform. The output waveform includes the first waveform and the second waveform, and has a transient response based on a first harmonic factor of the first phase branch and a second harmonic factor of the second phase branch.

Abstract: In an array substrate, a control electrode of a driving transistor, a second electrode of a compensation transistor and a second electrode of a first reset transistor are electrically connected to a first conductive connection portion, and a first electrode of the driving transistor and a second electrode of a data writing transistor are electrically connected to a second conductive connection portion. An orthographic projection of a first conductive portion of the first conductive connection portion overlaps with an orthographic projection of a first scan signal line, and overlaps with an orthographic projection of a second scan signal line. A first shielding layer includes a first shielding pattern; in a thickness direction of the substrate, the first shielding pattern is located between the first scan signal line and the first conductive portion, and/or the first shielding pattern is located between the second scan signal line and the first conductive portion.