43results about How to "Excellent characteristics" patented technology

The invention discloses a Fresnel coil electromagnetic ultrasonic transducer for defect and stress detection and a detection method, and belongs to the technical field of ultrasonic flaw detection and stress detection. The problems that an existing ultrasonic method is low in detection efficiency and poor in precision, and corrosion can be caused to the surface of large precise rotary equipment are solved. Comprising a sealing cover, a shell and a printed circuit board which are sequentially and fixedly connected from top to bottom, a Fresnel annular coil is machined on the upper surface of the printed circuit board, a permanent magnet is arranged in the shell, and the permanent magnet and the Fresnel annular coil are arranged in an up-down opposite mode. Ultrasonic focusing is achieved through the Fresnel coil, the signal strength is improved, the detection area is reduced, the spatial resolution of stress detection is improved, meanwhile, the electromagnetic ultrasonic technology does not corrode the surface to be detected of the large precision rotary equipment, a coupling agent does not need to be smeared, and the detection efficiency is effectively improved.

The present invention is a solid material for recovering carbon dioxide, the solid material including from 50% by weight to 99% by weight of sodium ferrite and from 1% by weight to 50% by weight of an organic binder or an inorganic binder, having an average particle diameter of 1 mm to 10 mm, and having a specific surface area of 1 m2 / g to 50 m2 / g, wherein an axial ratio of an average major axis diameter to an average minor axis diameter of primary particles of the sodium ferrite is from 1 to 2.

Provided is a rechargeable lithium battery including a positive electrode including a positive active material layer; a negative electrode including a negative active material layer; and an electrolyte solution including a nonaqueous organic solvent, a lithium salt, and an additive, wherein the positive active material layer includes a positive active material and carbon nanotube, the carbon nanotube is included in an amount of greater than 0.1 wt% and less than 3.0 wt% based on the total weight of the positive active material layer, and the additive includes a compound represented by Chemical Formula 1. Details of Chemical Formula 1 are as described in the specification.

A wireless charging apparatus according to an embodiment includes a magnetic unit with a low strain rate (thermal strain) at 180 °C, wherein a position change (△DR1) at 180 °C is 0.07 or less, to thereby provide the magnetic unit with improved heat resistance and magnetic properties and prevent deformation and damage of the magnetic unit during wireless charging, and further improve the high temperature stability and charging efficiency. Therefore, the wireless charging apparatus can be efficiently used in personal transportation means such as electric motorcycles, electric kickboards, electric scooters, electric wheelchairs, and electric bicycles, as well as transportation means such as electric vehicles requiring large-capacity power transmission between a transmitter and a receiver.

This invention relates to the field of intelligent brain disease diagnosis technology, specifically providing an auxiliary diagnostic method and system based on multimodal decoupled dynamic graph learning. The method includes: acquiring and preprocessing multimodal data (such as neuroimaging, genetic markers, etc.) of the subject; extracting common pathological information and modality-specific features through a shared encoder and modality-specific encoders respectively, and optimizing the separation process using a decoupling loss function; furthermore, fusing all modality embeddings using a multi-head self-attention mechanism with a masked matrix to generate initial node representations, where the mask is used to suppress modality self-attention; subsequently, performing hierarchical dynamic graph convolution based on the node representations: in each layer, dynamically updating the graph adjacency matrix by combining the current node representation with the original features, and iteratively optimizing the node representations through message passing; finally, inputting the optimized representations into a classifier to obtain disease prediction results. This invention improves the automation performance and reliability of diagnosis.

Provided is a non-aqueous electrolyte secondary battery wherein cycle characteristics are improved while improving the battery capacity per unit volume. This positive-electrode active material for a non-aqueous electrolyte secondary battery comprises: an electrode body in which a strip-shaped positive electrode and a strip-shaped negative electrode are wound with a separator interposed therebetween; a bottomed cylindrical exterior body having an outer diameter of 25 mm or more, that houses the electrode body and is connected to the negative electrode; and a sealing body that seals an opening at the upper end of the exterior body and is connected to the positive electrode. The positive electrode includes a positive-electrode current collector, and a positive-electrode mixture layer formed on the surface of the positive-electrode current collector, the positive-electrode mixture layer containing a positive-electrode active material and a phosphorus compound. The positive-electrode active material includes a lithium-containing composite oxide having a layered rock-salt structure. The weight per unit area of the positive-electrode mixture layer is 250 g / m2 or more. In the electrode body, three or more positive-electrode leads are led out.

The fluorene derivative of the present disclosure is represented by the following formula (1): Wherein R1 represents a substituent, k denotes an integer of 0 to 8, R2a, R2b, R2c, and R2d each represent a hydrogen atom or a substituent, R3a and R3b each represent a hydrogen atom or a substituent, and X1a and X1b each represent a group defined in the following formula (X1): wherein R4 and R5 each represent a hydrogen atom or an aliphatic hydrocarbon group, provided that the case where both R4 and R5 are a hydrogen atom is excluded; or R4 and R5 bond together to form a heterocyclic ring containing the nitrogen atom adjacent to R4 and R5. The present disclosure provides a novel fluorene derivative useful as an additive for improving the properties of a resin, a method for producing the same and a use thereof.

The application discloses a color video restoration method based on a low-rank quaternion tensor and a space-time SVTV constraint, and comprises the following steps: acquiring a color video sequence to be restored, judging a video format and completing format analysis, converting YUV format into RGB format, constructing a corresponding pure quaternion tensor representation, and generating damaged video data; building a neural network parameterized low-rank quaternion tensor continuous function model, constructing a neural representation driven space-time SVTV regular term, and restraining a saturation gradient and a brightness gradient in different dimensions; fusing data consistency constraints and regular constraints, constructing a finite-dimensional solvable joint optimization model, and completing solvability verification; taking the damaged video as input, iteratively solving an optimal prediction tensor through a gradient descent algorithm or an Adam optimization algorithm, fusing a predicted pixel and an original known pixel, and outputting a complete restored video after data restoration and format adaptation. The application can realize high-precision, high-robustness and high-stability restoration of a missing area of a video, and is suitable for various video damage scenes.

Disclosed are a jelly-roll type electrode assembly and a secondary battery including the same.

The present invention aims at providing a high-nickel positive electrode active material in which stability and initial capacity are improved and crack generation at an interface between primary particles is also suppressed, a preparation method thereof, and a positive electrode and a lithium secondary battery which include the positive electrode active material. Also, the present invention aims at providing a high-nickel positive electrode active material in which a washing process may be omitted by reducing an amount of lithium impurities, a preparation method thereof, and a positive electrode and a lithium secondary battery which include the positive electrode active material.

Provided are a negative electrode binder composition which has excellent slurry stability without using a thickener, such as cellulose, in a negative electrode active material for an LIB secondary battery, and which is suppressed in the resistance to swelling by a solvent, and a negative electrode using the same and a secondary battery. A negative electrode binder composition comprising a copolymer having a hydroxyl group-containing monomer (a) and an acid group-containing monomer (b) as essential components, in which the copolymer has a weight average molecular weight of 700,000 or more, as measured using an aqueous GPC measurement apparatus, and in which a dried polymer film of the negative electrode binder composition has a swelling ratio of 0 to 10% by weight, as measured after immersed in a carbonate mixed solvent at 45°C for 72 hours.

In an embodiment, disclosed are a negative electrode for a rechargeable lithium battery includes a current collector, a first active material layer on the current collector, and a second active material layer on the first active material layer, wherein at least one of the first active material layer and the second active material layer includes a silicon-based active material and a binder, the binder includes a copolymer (A) and a copolymer (B), the copolymer (A) includes a unit (a-1) derived from a (meth)acrylic acid-based monomer and a unit (a-2) derived from a (meth)acrylonitrile monomer, and the copolymer (B) includes a unit (b-1) derived from an aromatic vinyl-based monomer and a unit (b-2) derived from an ethylenically unsaturated monomer that is at least one of an unsaturated carboxylic acid alkyl ester monomer, a (meth)acrylic acid-based monomer, an unsaturated carboxylic acid amide monomer, and a conjugated diene monomer, and a rechargeable lithium battery including the same.

An agglomerated ore assessing method is provided that can assess clustering of reduced iron when it has been reduced at a high hydrogen concentration, with thermal compensation using blowing sensible heat taken into account. In this method, agglomerated ore is reduced while being subjected to a predetermined load at 1000°C to 1200°C, both inclusive, to produce a reduced aggregate; a tumble treatment is performed on the reduced aggregate using a tumble tester; cluster strength CS of the reduced aggregate calculated by Formula (1) below is measured; and a clustering property of the agglomerated ore is assessed using the cluster strength CS: CS = (W' / W) × 100 ··· (1), where CS is cluster strength (mass%); W is the mass (g) of a reduced aggregate that is equal to or larger than a maximum particle diameter of the agglomerated ore; and W' is the mass (g) of a reduced aggregate after a tumble treatment in the tumble tester that is equal to or larger than the maximum particle diameter of the agglomerated ore.

a negative electrode for a lithium ion cell battery capable of increasing a cell battery capacity and improving cell battery characteristics such as cycle characteristics is provided. A negative electrode mixture layer 1M including a negative electrode active material, a binder, and hydrophobized cellulose is formed as described below. The negative electrode active material includes nano-Si, the binder is an organic solvent-based binder (polyimide or polyvinylidene fluoride), and the hydrophobized cellulose results from substitution of a part of hydrophilic groups of cellulose by a hydrophobic group. When the organic solvent-based binder is used as described above, reaction between water and Si can be prevented, and the electrode characteristics can be improved. In a general technique, the addition amount of the organic solvent-based binder needs to be increased because of use of the Nano-Si, and therefore, this decreases the cell battery capacity and the cycle characteristics (cell battery life). However, by addition of the hydrophobized CeNF, the cell battery capacity and the cycle characteristics (cell battery life) can be improved.

Disclosed is a method for reusing a positive electrode active material, including the steps of: dipping a stack cell including a stacked and integrated positive electrode plate, separator and negative electrode plate, in a polar solvent to separate the positive electrode plate; heat treating the separated positive electrode plate to perform thermal decomposition of the binder and conductive material in the positive electrode material layer of the positive electrode plate, separating the current collector of the positive electrode plate from the positive electrode active material layer and recovering the active material in the active material layer; washing the recovered active material with an aqueous lithium compound solution showing alkalinity in an aqueous solution state; and adding a lithium precursor to the washed active material and carrying out annealing to obtain a reusable active material.

The present invention discloses a conductive material dispersion, an electrode and a secondary battery prepared using the conductive material dispersion, wherein the conductive material dispersion may include a carbon-based conductive material, a main dispersant, an auxiliary dispersant, and a non-aqueous solvent, the main dispersant may include a hydrogenated nitrile-based copolymer having a weight average molecular weight of 5,000 to 100,000, and the auxiliary dispersant may include a compound containing methylcellulose as a main chain.

The present invention provides a nitride semiconductor substrate including a substrate for film formation including a composite substrate having a plurality of layers bonded together and a single-crystal silicon layer formed on the composite substrate and a nitride semiconductor thin film formed on the substrate for film formation. The nitride semiconductor thin film includes a GaN layer, and the GaN layer is doped with at least 1×1019 atoms / cm3 or more and less than 5×1020 atoms / cm3 of carbon and / or 5×1018 atoms / cm3 or more and less than 5×1020 atoms / cm3 of iron. Thereby, the nitride semiconductor substrate with an improved high-frequency characteristic and a method of producing this substrate can be provided.

The present invention is a negative electrode active material including silicon monoxide particles coated with a carbon coating and doped with lithium, wherein the silicon monoxide particles satisfy that, in volumetric basis distribution measured with a laser-diffraction method particle size distribution measurement device, an integrated value of a relative amount of particles having a particle size of 1 um or less is 1% or less, an integrated value of a relative amount of particles having a particle size of 5 um or less is 20% or less, and an accumulative 50%-particle-size D50 satisfies 6.0 µm ≤ D50 ≤ 15.0 µm. This provides a negative electrode active material that can improve cycle characteristics while keeping high first efficiency when used as the negative electrode active material for a negative electrode of a secondary battery.

The object of the present invention is to provide a thermal power generation battery with excellent battery characteristics. The above problem can be solved by a thermal power generation element that does not require a temperature gradient, wherein a first part comprising a semiconductor which produce thermally excited electron and hole, a second part comprising an electrolyte in which an charge transport ion pair can be moved therein, and a third part comprising a substance that is an electrode, are in contact with each other in this order, and wherein a valance band potential of the semiconductor of the first part is positive with respect to a redox potential of a charge transport ion pair; and an ion which is more susceptible to oxidation among the two ions is oxidized at an interface between the first part and the second part; and an ion which is more susceptible to reduction among the two ions is reduced at an interface between the third part and the second part; and wherein the thermal power generation element satisfies the following formula (I): L / IDT=1−20 wherein L is a "shortest distance between the first part and the third part", and IDT is "ion diffusion thickness."

The present invention aims to provide a thermoplastic polyester elastomer having particularly excellent extrusion moldability and extrusion molding stability, from which a hollow and long molded article can be stably produced with a uniform thickness for a long time. A polyester elastomer comprising a hard segment made of a polyester constituted of an aromatic dicarboxylic acid and an aliphatic or alicyclic diol and a soft segment made of an aliphatic polycarbonate, wherein the hard segment and the soft segment are bonded to each other, wherein the polyester elastomer is at least partially end-capped with a reactive compound, wherein the reactive compound comprises a polycarbodiimide, wherein the polyester elastomer has an acid value of 15 eq / ton or less, and wherein, under a condition of 230°C, the polyester elastomer satisfies (i) the melt viscosity at a shear rate of 10 / sec after a preheating time of 5 minutes is 1, 800 Pa·s or more, and the melt viscosity at a shear rate of 1,000 / sec after a preheating time of 5 minutes is 800 Pa·s or less; and (ii) a ratio of the melt viscosity measured at a shear rate of 10 / sec after a preheating time of 5 minutes to the melt viscosity measured at a shear rate of 10 / sec after a preheating time of 25 minutes is 0.7 to 1.3.

The present invention relates to a photosensitive resin composition that not only has excellent optical density and light resistance, but also has improved transmittance, photoreactivity, and sensitivity, and thus can be preferably applicable to form a pixel defining layer pattern of various display devices, such as an organic electroluminescent device, and a display device manufactured using the same.

This application discloses an adaptive obstacle detection method and apparatus for adverse weather conditions, relating to the field of autonomous driving technology. The method acquires multi-source sensor data from an onboard vehicle, combines it with pre-calibrated sensor parameters to generate spatiotemporally aligned multi-source sensor data, extracts features to obtain feature maps for each modality, and projects all feature maps onto a bird's-eye view BEV space of the same resolution, using the LiDAR coordinate system as a reference, outputting a multi-modal BEV feature set. The feature set is concatenated along channels to form global state features, which are input into a pre-trained dual-branch adaptive decision network to obtain the output decision result, thereby generating the final image BEV features. Combining the multi-modal feature confidence weight matrix, the final image BEV features and the multi-modal BEV feature set are weighted to obtain globally fused BEV features, which are input into a 3D obstacle detection head for decoding and output detection results. This application can improve the robustness of multi-sensor fusion perception and obstacle detection accuracy under adverse weather conditions.

The present invention relates to a lithium ion battery negative electrode active material that includes an Si phase, an Si-Zr compound phase, an Si-X compound phase, and an Sn-Cu compound phase, X being at least one element selected from the group that consists of Fe, Ni, Co, Mn, Ti, V, and Cr, the Sn-Cu compound phase fraction of the whole being 0.1-18 mass%, and the Si phase fraction being 10-90 mass%.

The present invention provides a nonaqueous electrolyte solution which contains a nonaqueous solvent and a lithium salt, wherein: the nonaqueous solvent contains acetonitrile in an amount of 3% by volume to 97% by volume relative to the total amount of the nonaqueous solvent; the lithium salt contains a cyclic anion-containing lithium salt that is represented by formula (1) (wherein Rf moieties may be the same as or different from each other, and each represents a fluorine atom or a perfluoro group having 4 or less carbon atoms); and the content of the cyclic anion-containing lithium salt that is represented by formula (1) is from 0.001 to 5 in terms of the molar ratio relative to the content of the acetonitrile.

The present invention provides a jelly-roll type electrode assembly and a secondary battery including the same.

The invention relates to the technical field of medical drug preparation, in particular to a total glucosides of paeony nano preparation for treating inflammatory diseases and a preparation method of the total glucosides of paeony nano preparation. The nanogel dispersoid is formed by self-assembling molecules in a water phase through thermal induction gelatinization and a subsequent cooling process; the mass ratio of the total glucosides of paeony to the starch is (1: 10)-(1: 50); the average hydrated particle size of gel particles in the nanogel dispersion ranges from 80 nanometers to 300 nanometers, and the polydispersity index of the gel particles is smaller than 0.3. According to the total glucosides of paeony nano preparation for treating inflammatory diseases and the preparation method thereof, the process is simple, the cost is low, complicated equipment or organic solvents are not needed, the preparation is very suitable for industrial production, edible starch is taken as a carrier material, the biocompatibility is excellent, the safety is high, the enrichment of medicines at inflammatory parts can be effectively improved, the action time can be prolonged, and the application prospect is wide. Therefore, curative effect is improved, and administration frequency is reduced.

An aspect of the present disclosure is to provide a gas shielded arc welding wire capable of imparting excellent fatigue resistance characteristics and resistance to deformation due to residual stress to a weld zone. Another aspect of the present disclosure is to provide a welding member having excellent fatigue resistance characteristics and resistance to deformation due to residual stress of a weld zone, and a method for manufacturing the same.

The present invention provides a separator for aluminum electrolytic capacitors, said separator being formed of natural cellulose fibers and beaten regenerated cellulose fibers, and having excellent tear strength, short-circuit resistance and impedance characteristics. This separator for aluminum electrolytic capacitors is interposed between a positive electrode and a negative electrode of an aluminum electrolytic capacitor, and is formed of from 50% by mass to 90% by mass of natural cellulose fibers and from 50% by mass to 10% by mass of beaten regenerated cellulose fibers. This separator for aluminum electrolytic capacitors is configured to have a specific tear strength of from 20 to 100 mN·m2 / g and a short-circuit rate of 10% or less during application of 500 V in separator dielectric breakdown testing.

A steel sheet has a predetermined chemical composition containing, in mass%, C: more than 0.18% and less than 0.30%, Mn: more than 2.50% and 4.00% or less, and other elements. The steel micro-structure at a position at a depth of 1 / 4 of the sheet thickness from the surface in an L cross section of the steel sheet is, in area%, tempered martensite: 25 to 90%, ferrite: 5% or less, retained austenite: 10 to 50%, and bainite: 5% or less. At a position at a depth of 1 / 4 of the sheet thickness from the surface of the L cross section, the proportion of a total area of retained austenite grains having an area of 1 µm2 or more and having a grain shape circularity of 0.1 or more is less than 50% with respect to the entire area of retained austenite. The steel sheet satisfies the formula CMnγ / CMnα ≥ 1.2.

The present technology provides a lithium secondary battery which includes: a positive electrode; a negative electrode; a separator, and an electrolyte, wherein the negative electrode includes a negative electrode current collector and a negative electrode active material layer formed on at least one surface of the negative electrode current collector, the negative electrode active material layer includes a negative electrode active material, an aqueous binder, and a lithium carboxymethyl cellulose salt (CMC-Li salt), the electrolyte includes a lithium salt and an organic solvent, and the organic solvent includes diethyl carbonate.