Abstract: Disclosed is a method for improving sensitivity of vacuum testing of a vacuum switch, including the following steps: S100: smearing a water-soluble metal nanoparticle reagent evenly on a surface of a target material of a to-be-tested vacuum switch, performing standing and forming a metal nanoparticle coating on the surface of the target material; S200: bombarding, by using laser pulse, the surface of the target material where the metal nanoparticle coating is formed, so as to generate plasma on the surface of the target material; S300: obtaining a plasma image by collecting the plasma, and obtaining a plasma spectrum by performing spectroscopic analysis on the plasma image; and S400: obtaining a vacuum degree of the to-be-tested vacuum switch based on the plasma spectrum. The present disclosure can effectively improve a laser focusing degree and laser pulse stability and reduce noise interference, so as to lower testing limits and improve the sensitivity of online vacuum testing of the vacuum switch.

Abstract: Disclosed are an online vacuum degree detection system and method based on single-fiber laser-induced breakdown spectroscopy. In the system, a laser device generates laser that excites the laser through fiber induced breakdown spectroscopy; a fiber coupler couples and injects the laser; a single fiber is connected to the fiber coupler to transmit the laser; one end of an LIBS probe is connected to the single fiber, and the other end of the LIBS probe extends into a vacuum arc-extinguishing chamber; the laser is induced by the LIBS probe to generate plasma, and the plasma is subjected to self-emission imaging and enters the fiber coupler via the LIBS probe; a dichroscope is arranged on the fiber coupler to separate the laser from the plasma; a processor is connected to a camera and a spectrometer.

Abstract: A method, an apparatus and a device for identifying battery parameters, and a storage medium are provided.

Abstract: The drilling system withstands downhole conditions at the bottom of the borehole and drilling conditions due to the constant movement and vibration. The drilling system includes a drill bit and a sensor system with a system housing, a primary power supply and interior sensor. The primary power supply includes piezoelectric panels for converting radial vibration into energy. The interior sensor is locally powered by the primary power supply at the remote downhole location at the bottom of the borehole. The interior sensor collects data related to a downhole condition and is in communication with the primary power supply to generate confirmed data based on the amount of energy generated by the primary power supply. The confirmed data is more accurate and reliable than the data collected by the interior sensor and can be used to guide the path of the drill bit through the rock formation in drilling operations.

Abstract: The drilling system withstands downhole conditions at the bottom of the borehole and drilling conditions due to the constant movement and vibration. The drilling system includes a drill bit and a sensor system with a system housing, a primary power supply and interior sensor. The primary power supply includes piezoelectric panels for converting radial vibration into energy. The interior sensor is locally powered by the primary power supply at the remote downhole location at the bottom of the borehole. The interior sensor collects data related to a downhole condition and is in communication with the primary power supply to generate confirmed data based on the amount of energy generated by the primary power supply. The confirmed data is more accurate and reliable than the data collected by the interior sensor and can be used to guide the path of the drill bit through the rock formation in drilling operations.

Abstract: A diffuser for de-speckling laser light includes a transparent diffuser substrate with de-speckling microstructures disposed on or formed into a first (i.e. front) side thereof, and a reflective film coated onto an opposite second (i.e. back) side of the transparent diffuser substrate. An extinction layer may be coated onto the reflective film. An anti-reflection (AR) coating may be disposed on the first side of the transparent diffuser substrate. A luminescent wheel is also disclosed, including a disk and an optical ring secured to the disk so as to rotate with the disk. The optical ring includes at least one fluorescent segment and the aforementioned diffuser.

Abstract: The present disclosure relates to the technical field of drilling, in particular to a composite material, a composition, a drilling fluid, and a method for plugging formation well wall fractures. The composite material includes a polymer matrix and metal ions embedded in the polymer matrix, an embedding rate of the metal ions is not less than 90 wt %, and turbidity of an aqueous solution of the composite material is not less than 1000 NTU under a condition of pH?8. The composite material can actively and quickly identify a change in a formation environment based on a difference in pH values between the drilling fluid and the formation environment, and achieve a precise response and precise matching with a formation well wall fracture environment, and a small amount of composite material can effectively increase a plugging rate of the formation well wall fracture.

Abstract: In communication applications, aggregate source image data at a transmitter exceeds the data that is needed to display a rendering of a viewport at a receiver. Improved streaming techniques that include estimating a location of a viewport at a future time. According to such techniques, the viewport may represent a portion of an image from a multi-directional video to be displayed at the future time, and tile(s) of the image may be identified in which the viewport is estimated to be located. In these techniques, the image data of tile(s) in which the viewport is estimated to be located may be requested at a first service tier, and the other tile in which the viewport is not estimated to be located may be requested at a second service tier, lower than the first service tier.

Abstract: The present disclosure relates to a single stranded RNA vector suitable for introducing a therapeutic agent, such as a peptide, a protein or a small RNA, into a host plant or otherwise treating a host plant. The vector does not encode for any movement protein or coat protein, but is capable of capable of systemic and phloem-limited movement and replication within the host plant. The vector may be modified to include an siRNA effective against a bacterial plant pathogen. Alternatively, the wild type vector may be introduced into the plant to inhibit or control a bacterial infection in the plant by way of non-specific siRNA created by the RNA silencing or transitive silencing mechanism of the plant. Alternatively, the vector may be modified to include an insert that increases a silencing mechanism of the plant, for example an insert that is a complement to a plant virus.

Abstract: Provided is a diffuser for de-speckling laser light. The diffuser includes a transparent diffuser substrate with de-speckling microstructures disposed on or formed into a first (i.e. front) side of the transparent diffuser substrate, and a reflective film coated onto an opposite second (i.e. back) side of the transparent diffuser substrate. An extinction layer may be coated onto the reflective film. An anti-reflection (AR) coating may be disposed on the first side of the transparent diffuser substrate. Also provided is a luminescent wheel including a disk and an optical ring that includes at least one fluorescent segment and the aforementioned diffuser. The optical ring is secured to the disk so as to rotate with the disk.

Abstract: In communication applications, aggregate source image data at a transmitter exceeds the data that is needed to display a rendering of a viewport at a receiver. Improved streaming techniques that include estimating a location of a viewport at a future time. According to such techniques, the viewport may represent a portion of an image from a multi-directional video to be displayed at the future time, and tile(s) of the image may be identified in which the viewport is estimated to be located. In these techniques, the image data of tile(s) in which the viewport is estimated to be located may be requested at a first service tier, and the other tile in which the viewport is not estimated to be located may be requested at a second service tier, lower than the first service tier.

Abstract: A dendritic polymer contains a dendritic polyester as a core, and a plurality of arms obtained by means of polymerization of an alkenyl monomer. The root-mean square radius of gyration of the dendritic polymer does not exceed 100 nm. The alkenyl monomer contains a non-ionic monomer and an anionic monomer. The polymeric segments formed by a monomer generally used for synthesizing a filtrate loss reducer are used as the arms of the dendritic polymer, which is obtained by means of free radical polymerization. Compared with a linear polymer having an identical molecular weight, the dendritic polymer has a smaller root-mean-square radius of gyration and is more compact in structure. suitable for use in a drilling fluid.

Abstract: Provided are a powder coating material for household appliance coiled material and a preparation method thereof. The powder coating material comprises: a polyester resin, a curing agent, a silicate, a filler, a pigment, and an auxiliary agent. The powder coating material for the household appliance coiled material not only can meet the requirements of coating processes of the coiled material, but also has excellent performances such as flexibility, T-bend performance, impact resistance and solvent resistance, while satisfying the requirement for the thick coatings of the household appliance coiled material.

Abstract: In one implementation, a method is performed for generating metadata estimations based on metadata subdivisions. The method includes: obtaining an input image; obtaining metadata associated with the input image; subdividing the metadata into a plurality of metadata subdivisions; determining a viewport relative to the input image based on at least one of head pose information and eye tracking information; generating one or more metadata estimations by performing an estimation algorithm on at least a portion of the plurality of metadata subdivisions based on the viewport; and generating an output image by performing an image processing algorithm on the input image based on the one or more metadata estimations.

Abstract: In one implementation, a method of generating a bit stream encoding a video stream is performed by a device including one or more processors and non-transitory memory. The method includes decomposing a video stream into a plurality of frequency band video streams. The method includes determining a target bitrate and determining, for each frequency band video stream, a respective frequency band bit rate based on the target bit rate. The method includes encoding each of the plurality of frequency band video streams at its respective frequency band bit rate and transmitting, over a channel, each encoded frequency band video stream.

Abstract: The present disclosure provides a precursor solution of a semiconductor electrothermal film, which comprises component A, component B, and component C. The component A comprises the following components by weight: 2-10 parts of tin tetrachloride pentahydrate, 3-6 parts of stannous chloride and 0.3-1 part of glycerol, also comprises a pH regulator, the pH of the component A is 4.7-6.2; the component B comprises the following components by weight: 5-10 parts of conductivity regulator, the conductivity regulator is selected from a group consisting of antimony trichloride dihydrate, bismuth trioxide, aluminum oxide and thallium dioxide, 0.6-1 part chlorinated aluminum and a mixture thereof, also comprises a pH regulator, the pH of the component B is 4.7-5.0; the component C comprises the following components by weight: 0.5-0.7 parts of tin oxide, 0.8-1.5 parts of bismuth oxide and 15-25 parts of ethanol; also comprises 15-30 parts of distilled water.

Abstract: Disclosed in the present disclosure is an intelligent cut tobacco drying control system and method based on volatile moisture content, wherein the system comprises a heat and mass transfer process analysis module, a material and energy accounting module, a prediction model module, a model control module and an abnormality early warning module. The present disclosure analyzes a drying process of the thin sheet shredded tobacco leaf drying machine, can provide theoretical support for building the intelligent control system under changeable conditions and realize intelligent production of drying shredded tobacco leaves. The present disclosure aims to transform the existing control mode and accurately predict the drainage opening by using a fitting model between the volatile moisture content and the drainage opening, so as to realize transformation from artificial control to intelligent control.

Abstract: In communication applications, aggregate source image data at a transmitter exceeds the data that is needed to display a rendering of a viewport at a receiver. Improved streaming techniques that include estimating a location of a viewport at a future time. According to such techniques, the viewport may represent a portion of an image from a multi-directional video to be displayed at the future time, and tile(s) of the image may be identified in which the viewport is estimated to be located. In these techniques, the image data of tile(s) in which the viewport is estimated to be located may be requested at a first service tier, and the other tile in which the viewport is not estimated to be located may be requested at a second service tier, lower than the first service tier.

Abstract: An anti-loosening bolt and nut assembly structure includes a bolt having a bolt head and a bolt shank, two elastic washers, and a nut. The two elastic washers are sleeved on the bolt shank. The two elastic washers are matched with the bolt head and the nut, respectively. Each elastic washer includes an annular body having an opening. A bottom of the annular body is provided with anti-slip teeth. A top of the annular body extends upward to form an anti-loosening ring. An outer inclined surface is formed on an outer side of the anti-loosening ring. The anti-loosening ring is provided with a plurality of first unidirectional teeth. The bolt head and the nut each includes a unidirectional anti-loosening device matched with the first unidirectional teeth.

Abstract: The present invention relates to a cut-stem separating and baffling apparatus and a primary air separation apparatus. The cut-stem separating and baffling apparatus includes a cut-stem separating baffle and struts; and the strut includes a base, a hanging panel, and an inner hexagon adjustment bolt, where the base includes a connecting segment and a support segment that are connected to each other, where the connecting segment is located above the cut-stem separating baffle, and the support segment is located behind the cut-stem separating baffle; the hanging panel includes a transverse hanging panel, and a longitudinal hanging panel, and a connecting hanging panel is disposed in a direction of the longitudinal hanging panel toward the cut-stem separating baffle, where the connecting hanging panel is connected to the cut-stem separating baffle; and the connecting segment of the base is connected to the transverse hanging panel using the inner hexagon adjustment bolt.