Abstract: A method for a selective detection of L-tryptophan (L-Trp) using formaldehyde as a medium is disclosed. The method includes preparation of a copper sulfide nanosheets-chitosan/acidified functionalized multi-wall carbon nanotubes (CuS NS-CS/F-MWCNTs) composite material, preparation of a composite film-modified electrode CuS NS-CS/F-MWCNTs/GCE, and a detection of the L-Trp. Since oxidation peaks of L-Trp and L-tyrosine (L-Tyr) overlap and are difficult to separate, the present invention provides a method for a highly selective detection of L-Trp through the Pictet-Spengler reaction of formaldehyde (HCHO) with L-Trp, in which the oxidation peak potential of L-Trp is shifted to 0.82 V and the oxidation peak potential of L-Tyr is 0.63 V, thereby effectively avoiding the interference of L-Tyr. The CuS NS-CS/F-MWCNTs/GCE is applied to detect L-Trp in the formaldehyde medium without any interference from L-Tyr or other amino acids with 50-fold concentrations.

Abstract: The technical solutions relate to the fields of artificial intelligence technologies and natural language processing technologies. According to an embodiment, entity detection is performed on a query text to acquire a target entity; a feature representation of the query text is generated by using a pre-trained context representation model; and based on the feature representation of the query text and pre-acquired feature representations of entity categories corresponding to the target entity, the target entity is linked to an entity category with the highest matching degree.

Abstract: The present disclosure discloses a catalyst and a method for preparing 2-ethoxyphenol by catalytic depolymerization of lignin. The catalyst comprises sepiolite as a carrier and tungsten, nickel and molybdenum as active components supported on sepiolite. The catalyst for preparing 2-ethoxyphenol by catalytic depolymerization of lignin in the present disclosure can catalytically depolymerize lignin, realize the directional preparation of 2-ethoxyphenol from lignin, and co-produce lignin oil. It has a comparatively high selectivity for 2-ethoxyphenol and can achieve a lignin conversion rate of more than 95%, a 2-ethoxyphenol selectivity of more than 20% in a liquid product, and a yield of more than 100 mg/g of lignin.

Abstract: The present invention relates to a high heat-resistant/oxidation-resistant/flame retardant?non-flammable liquid ceramic coating film for protecting an exterior of an apparatus in an extreme environment. Provided are a method of forming a high heat-resistant coating film including: (a) preparing a liquid ceramic filling agent by mixing a ceramic filler including iron (III) oxide (Fe3O4) powder, a diluent, and an inorganic nanosol; (b) applying the liquid ceramic filling agent to at least one surface of a substrate to form a coating film; and (c) curing the coating film by drying the substrate, and a high heat-resistant coating film prepared thereby.

Abstract: A light-modulation film (1) includes a light-modulation layer (30) and a catalyst layer (40) in this order on a polymer film substrate (10). A surface layer (70) may be disposed on the catalyst layer. The state of the light-modulation layer reversibly changes between a transparent state due to hydrogenation and a reflective state due to dehydrogenation. The catalyst layer promotes hydrogenation and dehydrogenation of the light-modulation layer. An arithmetic mean roughness of the surface of the catalyst layer is preferably 16 nm or less. A thickness of the light-modulation layer is preferably 2 to 20 times the thickness of the catalyst layer.

Abstract: The present application discloses a method and apparatus for identifying an updated road, a device and a computer storage medium, and relates to the field of big data technologies. A specific implementation solution is as follows: comparing a road area extracted based on the latest satellite image with a road area extracted based on a historical satellite image, to obtain a candidate updated road; mapping the candidate updated road into road network data according to a coordinate position of the candidate updated road; acquiring a user trajectory set corresponding to the candidate updated road within a recent preset period; and identifying, based on a matching result between the user trajectory set and the road network data, whether the candidate updated road is an actual updated road. Updated roads can be more accurately identified through the method according to the present application.

Abstract: The present disclosure discloses a method for preparing caprolactam including: (1) contacting cyclohexanone oxime with a catalyst to carry out reaction in the presence of ethanol and under the condition of gas phase Beckmann rearrangement reaction of cyclohexanone oxime; (2) separating the reaction product obtained in step (1) to produce an ethanol solution of crude caprolactam, and then separating the ethanol solution of crude caprolactam to obtain ethanol and crude caprolactam; (3) removing impurities with boiling points lower than that of caprolactam in the crude caprolactam to obtain a light component removal product; (4) mixing the light component removal product with a crystallization solvent to carry out crystallization and solid-liquid separation to obtain a crystalline crystal; (5) subjecting the crystalline crystal to a hydrogenation reaction; wherein the crystallization solvent contains 0.1-2 wt % of ethanol.

Abstract: A cathode active material for an all-solid-state battery includes: active material particles; and a coating layer covering at least a portion of the surface of the active material particles, wherein the coating layer includes lithium (Li), niobium (Nb), and at least one element selected from the group consisting of vanadium (V), zirconium (Zr) and combinations thereof.

Abstract: The disclosure provides a method and an apparatus for recognizing a speech, an electronic device and a storage medium. Based on obtaining target speech information, state information of an application corresponding to the target speech information and contextual information are obtained. Semantic completeness of the target speech information is obtained based on the state information and the contextual information. A monitoring duration corresponding to the semantic completeness is obtained, and it is monitored whether there is speech information within the monitoring duration. Speech recognition is performed on the target speech information based on no speech information being monitored within the monitoring duration.

Abstract: [PROBLEM TO BE SOLVED] To provide a solid heat storage material that is made of a VO2-based inorganic material, is easy to sinter, has a high latent heat storage capacity, and can be suitably used as a phase change solid heat storage material, and a method of manufacturing the same. [SOLUTION] A powder material for sintering of a first aspect of the present invention includes vanadium and oxygen and includes a vanadium oxide represented by the chemical formula VO2 and at least one other type of vanadium oxide, in which, when the molar ratio of V and O in all the powder is expressed as 1:(2+d), d is in the range of 0<d<0.5.

Abstract: Some embodiments relate to a device for retrieving a body from within a tubular structure, the device having a proximal end and a distal end and comprising: a device body at the proximal end; a conduit extending away from the device body to the distal end and sized to be receivable in the tubular structure; at least one actuator operably associated with the device body; a first strand extending at least in part through the conduit; a second strand extending at least in part through the conduit; wherein the first and second strands are affixed at the distal end of the device, and wherein the second strand is wound around the first strand along at least a distal length of the first strand; wherein the at least one actuator is operable to cause the second strand to adopt an expanded state in which the second strand defines a trawl volume to catch the body for retrieval of the body from the tubular structure.

Abstract: A sensorless control method and an apparatus for a three-phase switched reluctance motor. The sensorless control method obtains line inductances of three phases according to real-time phase inductances of the three-phase switched reluctance motor and then determines feature points of the line inductances of the three phases. A position angle of the rotor at any time in the next corresponding region is calculated according to an average rotation speed of the rotor in the region corresponding to two adjacent feature points. A control signal is output to realize a precise sensorless control for the three-phase switched reluctance motor. The control apparatus includes a microcontroller, a power conversion circuit, a drive module for the power conversion circuit, a current detection module, a voltage detection module, an input and output module and a direct current regulated power supply.

Abstract: Provided is a thermosensitive phosphazene-based polymer including an amino acid ester moiety, a polyethyleneglycol moiety, and a moiety including a sulfate group linked directly or by a linker in a predetermined ratio, a method of preparing the same, and a hydrogel-formable composition including the same. For example, a hydrogel formed from the composition may be used for tissue regeneration or drug delivery or used as a storage, a body tissue regeneration inducer, or a filler in a body.

Abstract: An FPGA-based graph data processing method is provided for executing graph traversals on a graph having characteristics of a small-world network by using a first processor being a CPU and a second processor that is a FPGA and is in communicative connection with the first processor, wherein the first processor sends graph data to be traversed to the second processor, and obtains result data of the graph traversals from the second processor for result output after the second processor has completed the graph traversals of the graph data by executing level traversals, and the second processor comprises a sparsity processing module and a density processing module, the sparsity processing module operates in a beginning stage and/or an ending stage of the graph traversals, and the density processing module with a higher degree of parallelism than the sparsity processing module operates in the intermediate stage of the graph traversals.

Abstract: Embodiments of the invention relate to low-cost and low-complexity mesh routing method to provide connectivity within a channel-diverse mesh network in which there is no common channel available for the whole network and in which a single transceiver is provided in each node. The mesh routing method includes a procedure for flooding radio resource maps (RRMs), a procedure for determining the operating channel for each mesh node device, a routing procedure for establishing a route for a pair of source device and destination device, and a maintenance procedure for repairing routes and optimize selection of operating channel.

Abstract: A venting device and a tire mold are disclosed for use in a tire vulcanization process. The venting device includes a core shaft and a sleeve sleeved over the core shaft, a venting passage is formed between the sleeve and the core shaft, the core shaft includes a shaft body, one end of the shaft body is connected to a shaft head, the other end of the shaft body is connected to a shaft end piece provided with a groove extending through the shaft end piece, and an end of the groove facing away from the shaft head is closed. The shaft end piece is used for axially stopping the shaft body, and the shaft end piece is further used for assembling the sleeve and the core shaft by contracting and springing back.

Abstract: A partial pressure tool for real-time measurement and adjustment of pressure and viscosity and a measurement method thereof. The partial pressure tool includes an outer cylinder and adjustable annular throttling grooves, and the adjustable annular throttling grooves are split-type grooves vertically and successively installed on an inner wall of the outer cylinder at equal intervals. Four single throttling grooves are adjacent to each other and arranged concentrically on a circumferential surface. A viscometer is installed on a surface of an arc-shaped inner plate in a tail-end adjustable annular throttling groove. The viscometer is connected to an induction board through a transmission line. The arc-shaped inner plate in the tail-end adjustable annular throttling groove is provided with a pressure sensor and a torque sensor, and the pressure sensor and the torque sensor both are connected to the induction board. The induction board is connected to a DSP control module.

Abstract: Provided is a dielectric thin film. The dielectric thin film includes: a plurality of ferroelectric domains including phonons having displacement in a direction of a first axis; and a plurality of spacers configured to block elastic interaction between the phonons, wherein the ferroelectric domains and the spacers are alternately and repeatedly arranged along a second axis which is perpendicular to the first axis.

Abstract: The invention discloses a person search method based on person re-identification driven localization refinement. On one hand, the region of interest (ROI) conversion module converts an original input image into a small image corresponding to a ROI, and contradiction existing in part of features shared by a person re-identification network and a detection network is avoided; and on the other hand, loss of the person re-identification network can be transmitted back to the detection network in a gradient manner through the ROI conversion module, the supervision of loss of the person re-identification network for the detection bounding box output by the detection network is realized, and the adjusted detection bounding box can effectively remove background interference, contains more useful attribute information and is more suitable for person search, so that the person search accuracy is greatly improved.

Abstract: The invention describes phospho-amino pincer-type ligands, metal complexes thereof, and catalytic methods comprising such metal complexes for conversion of carbon dioxide to methanol, conversion of aldehydes into alcohols, conversion of aldehydes in the presence of a trifluoromethylation agent into trifluorinated secondary alcohols, cycloaddition of carbon dioxide to an epoxide to provide cyclic carbonates or preparation of an amide from the combination of an alcohol and an amine.