Abstract: Since defect areas in collected hydro turbine defect images account for a small proportion and there is a significant color difference between surrounding background and defects, which creates too much redundant information and greatly affects detection speed, a method for detecting defects in a hydro turbine top cover based on an improved YOLOv8 model involves first cropping collected defect images to obtain cropped images, then expanding the cropped images by image enhancement techniques such as image flipping and image blurring to obtain a training dataset. A defect detection network based on YOLOv8-CBAM is constructed and trained to generate a defect detection model for detecting the defects in the hydro turbine top cover. The method achieves high precision in defect detection for the hydro turbine top cover.

Abstract: An in-situ robot material-reducing processing method and system for a hydraulic turbine top cover are provided. The method includes: S1, obtaining frequency response data of an end of a cutter controlled by a robot by performing an impact hammer test; S2, obtaining a modal parameter of the end of the cutter controlled by the robot by using a modal analysis software; S3, obtaining a damping matrix [C] and a stiffness matrix [K] by using a free vibration equation of a damped system; S4, establishing a dynamic model of a three-degree-of-freedom robot processing system; S5, obtaining a milling force coefficient of the cutter by performing a calibration experiment; S6, solving a dynamic equation; S7, drawing a lobe diagram of flutter stability of a milling process performed by the robot; and S8, obtaining stable milling process parameters according to the lobe diagram of flutter stability.

Abstract: A device for repairing a top cover of a hydro turbine by adding or removing materials includes a rotating support base, a connecting arm, a movable frame, and a machining assembly. The rotating support base includes a base and a rotating seat disposed on the base, a driving assembly is disposed on the base, and an output shaft of the driving assembly is drivably connected to the rotating seat. An end of the connecting arm is connected to the rotating seat, and the other end of the connecting arm is connected to the movable frame. A lifting plate is disposed on the movable frame, a sliding table assembly and a measuring system are disposed on an upper side of the lifting plate. A swivel seat is disposed on an upper side of the sliding table assembly, and the machining assembly is detachably mounted on the swivel seat.

Abstract: An in-situ robot programming method for a hydraulic turbine top cover based on binocular structured light vision is provided, which relates to the field of robot vision-guided intelligent processing technologies. The method performs hand-eye calibration on a binocular structured light camera and a robot to construct a coordinate conversion relationship thereof, collects an annular to-be-processed area of the hydraulic turbine top cover by the binocular structured light camera for joining, and obtains a trajectory and a trajectory plan through point cloud processing algorithms, to thereby achieve a rapid programming for the hydraulic turbine top cover based on guidance of binocular structured light vision. The method adapts to changes in sizes of the hydraulic turbine top cover and take into account real-time performance and robustness, so that impacts of uncertainty factors on the system are greatly weakened, and the method has characteristics of intelligence and high degree of systematization.

Abstract: Methods of making such compounds, powders, and cathode active materials are described. The powders are formed of particles with specific properties: a particle size distribution with a D50 ranging from 10 ?m to 20 ?m, a D10 less than 8 ?m, and a D99 of the particles ranges from 25 ?m to 35 ?m. The final compound is represented by the Formula Li?(Co1-x-y-zMnxMezAly)O?, wherein 0.95<?<1.05, x?1.00, 0<y?0.04, 0<z?0.050, and ??2.

Abstract: The disclosure provides a plurality of particles. Each particle may include a material comprising 0.95 to 1.30 mole fraction Li, at least 0.60 and less than 1.00 mole fraction Co, up to 10,000 ppm Al, 1.90 to 2.10 mole fraction O, and up to 0.30 mole fraction M, where M is at least one element selected from B, Na, Mg, P, Ti, Ca, V, Cr, Fe, Mn, Ni, Cu, Zn, Al, Sc, Y, Ga, Zr, Ru, Mo, La, Si, Nb, Ge, In, Sn, Sb, Te, and Ce. Each particle may also include a surface composition comprising a mixture of LiF and a metal fluoride. An amount of fluorine (F) is greater than 0 and less than or equal to 5000 ppm. The metal fluoride comprises a material selected from the group consisting of AlF3, CaF2, MgF2, and LaF2. The surface composition may also include a metal oxide comprising a material selected from the group consisting of TiO2, MgO, La2O3, CaO, and Al2O3. An amount of the metal oxide is greater than 0 and less than or equal to 20000 ppm.

Abstract: Compounds, particles, and cathode active materials that can be used in lithium ion batteries are described herein. Methods of making such compounds, powders, and cathode active materials are described. The particles have a particle size distribution with a D50 ranging from 10 ?m to 20 ?m.

Abstract: A cathode active material includes a plurality of cathode active compound particles and a coating disposed over each of the cathode active compound particles. The coating includes a lithium (Li)-ion conducting oxide containing lanthanum (La) and titanium (Ti).

Abstract: A method of forming a tire-forming additive includes converting biomass to syngas; synthesizing at least one of benzene and an alkyl-substituted benzene, from carbon monoxide and hydrogen in the syngas; synthesizing at least one of aniline and an alkyl-substituted aniline from the at least one of the benzene and the alkyl-substituted benzene; and synthesizing a tire-forming additive from the at least one of the aniline and the alkyl-substituted aniline, the tire-forming additive being selected from the group consisting of an anti-degradant, a vulcanization accelerator, and combinations thereof.

Abstract: A method of forming a tire-forming additive includes converting shredded tires/tire components to syngas; synthesizing at least one of benzene and an alkyl-substituted benzene, from carbon monoxide and hydrogen in the syngas; synthesizing at least one of aniline and an alkyl-substituted aniline from the at least one of the benzene and the alkyl-substituted benzene; and synthesizing a tire-forming additive from the at least one of the aniline and the alkyl-substituted aniline, the tire-forming additive being selected from the group consisting of an anti-degradant, a vulcanization accelerator, and combinations thereof.

Abstract: This invention is based upon the unexpected discovery that rice husk ash silica (synthetic amorphous silica from rice husk ash) provides an exceptionally good combination of properties when used in certain tire tread rubber formulations, such as an excellent combination of traction, tread-wear, and rolling resistance. These tread rubber formulations are comprised of a blend of high cis-1,4-polybutadiene rubber and a solution styrene-butadiene rubber which is preferably functionalized with amine groups, siloxy groups, thiol groups, carboxyl groups, or groups that are reactive with hydroxyl groups present on the precipitated rice husk ash silica. The use of such rice husk silica as a reinforcing-filler in rubber formulations is also highly desirable because such silica is a sustainable resource (bio-renewable) which is derived from an agricultural waste material which would otherwise be discarded as an undesirable waste product.

Abstract: The present invention discloses a device for evaluating and demagnetizing residual magnetism quantity of a power transformer. A main circuit comprises a switching power supply the two ends of which are respectively connected with a filter capacitor and a resistor in parallel. A forward end of the switching power supply is connected with a main switch in series. A rear end of the main switch is connected with a series branch of a sixth switch and a first resistor, a series branch of a first switch and a second switch, and a series branch of a third switch and a fourth switch are connected in parallel. A driving circuit is respectively connected with driving ends of the main switch, the sixth, first, second, third and fourth switches. A control circuit is connected with the driving circuit for sending an instruction to the driving circuit.

Abstract: A method for recovering carbon fibers from composite material waste includes coating a solid acid powder onto a surface of a composite material waste having carbon fibers and a resin matrix, pyrolyzing the resin matrix of the coated composite material waste in an inert environment, and oxidizing the pyrolyzed resin of the composite material waste in an air environment.

Abstract: A flexible sensor unit is embedded in a tire. The flexible sensor unit includes a plurality of individual circuit boards. Each circuit board includes at least one electronic component. The at least one electronic component includes a radio frequency identification integrated circuit, a microcontroller unit, at least one sensor, a power source and a boost converter. Each one of a plurality of electrically conductive flexible connecting ribbons extends between the circuit boards. An end ribbon is electrically connected to at least one of the circuit boards. An antenna is disposed on the end ribbon. The antenna transmits data from the at least one sensor, as processed by the microcontroller unit, and identification data from the radio frequency identification integrated circuit, to an external reader.

Abstract: A flexible sensor unit is embedded in a tire. The flexible sensor unit includes a plurality of individual circuit boards. Each circuit board includes at least one electronic component. The at least one electronic component includes a radio frequency identification integrated circuit, a microcontroller unit, at least one sensor, a power source and a boost converter. Each one of a plurality of electrically conductive flexible connecting ribbons extends between the circuit boards. An end ribbon is electrically connected to at least one of the circuit boards. An antenna is disposed on the end ribbon. The antenna transmits data from the at least one sensor, as processed by the microcontroller unit, and identification data from the radio frequency identification integrated circuit, to an external reader.

Abstract: A loop heat pipe with a vapor-liquid two-phase flow injector, including: an evaporator, the vapor-liquid two-phase flow injector, a boiling pool and a condenser. The two-phase flow injector has a central vapor inlet and a circumferential liquid inlet, and is connected to an outlet of the evaporator and an inlet of the boiling pool. The condensate inlet of the condenser is connected to an outlet of the boiling pool. An outlet of the condenser is connected to the evaporator. With the vapor-liquid two-phase flow injector, the invention can directly introduce a part of the supercooled liquid working medium to the boiling pool without passing through the evaporator, solving the problem of insufficient liquid supply for the boiling pool and increasing the driving force for the system operation. Therefore, the invention enables the efficient cooling of electronic devices and the long-distance heat transfer.

Abstract: A method for recovering carbon fibers from composite waste includes coating a water-soluble catalyst powder on a surface of composite waste having carbon fibers and a resin matrix and pyrolyzing the resin matrix of the coated composite waste.

Abstract: An encapsulated sensor unit is embedded in a tire. The encapsulated sensor unit includes a sensor portion and an antenna portion. A first encapsulating layer is disposed about the sensor portion, and not about the antenna portion. A second encapsulating layer is disposed about the first encapsulating layer and the antenna portion. A third encapsulating layer is disposed about the second encapsulating layer.