Abstract: Methods and apparatus for obtaining data from a density-viscosity (DV) sensor of a downhole tool, wherein the DV sensor comprises a resonating element disposed in a fluid flowing in a flowline of the downhole tool, and determining a resonance frequency and quality factor of the resonating element utilizing a nonlinear regression and/or a plurality of resonance modes exhibited by the obtained data.

Abstract: The present application provides a method and a system for determining a saturation exponent of a heterogeneous carbonate reservoir. The method comprises: dividing a target reservoir into at least two reservoir types in accordance with a predetermined rule; obtaining a correspondence relationship between a saturation exponent and a bound water saturation in each of the reservoir types; determining the reservoir type to which a to-be-measured core belongs in accordance with the predetermined rule; obtaining a bound water saturation of the to-be-measured core; and calculating the saturation exponent of the to-be-measured core according to the bound water saturation of the to-be-measured core on the basis of the correspondence relationship of the reservoir type to which the to-be-measured core belongs.

Abstract: An exhaust postprocessing component comprises an exhaust pipe, a first support installed on the exhaust pipe, a common rail installed on the first support, an inlet pipeline and an outlet pipeline that are connected to the common rail, a sensor, and a bundle that is connected to the sensor. The common rail comprises a shell and a pressure detection apparatus and a pressure adjustment apparatus that are installed on the shell. The shell comprises an inlet passage and an outlet passage. The pressure detection apparatus is connected to the inlet passage. The pressure adjustment apparatus is connected between the inlet passage and the outlet passage, so as to connect or disconnect the inlet passage and the outlet passage. The engine exhaust postprocessing component further comprises a second support. The bundle, the inlet pipeline, and the outlet pipeline are all gathered at the second support. In this way, the exhaust postprocessing component is easy to be installed with another component.

Abstract: The present invention provides a refrigerating system, including: a refrigerating loop (100), including a compressor (190), a condenser (110), a main throttling element (180), and an evaporator (120) that are connected in sequence through a pipeline; and a purification loop (200), including a purification compressor (210), a purification condenser (220), a purification throttling element (240), and a low-temperature separator (230) that are connected in sequence through a pipeline, the purification loop being bidirectionally connected to the refrigerating loop through the low temperature separator and configured to separate a non-condensable gas in the refrigerating loop; wherein the purification condenser is capable of exchanging heat with a refrigerant in the refrigerating loop. Thus, efficient and reliable separation of the refrigerant and the non-condensable gas is achieved.

Abstract: According to an example, an AP may obtain an influence index for each of antenna combinations, and determine antenna combinations whose influence indices are smaller than or equal to a pre-determined threshold to be valid antenna combinations. The antenna combinations may include antennas not more than the maximum number of transmitting links supported by the AP. Each influence index may indicate the influence of an antenna combination on default antenna combinations of neighboring APs operating on the same channel. The AP may adjust the available transmission rates supported by the AP according to the largest number of antennas in the valid antenna combinations. The AP may select a transmission rate from the range for a frame, determine the number of antennas corresponding to the selected transmission rate, and select an antenna combination in which the number of antennas equals the determined number of antennas from the valid antenna combinations for transmitting the frame.

Abstract: A common rail assembly used in a urea injection system, comprising at least a first common rail and a second common rail which are connected to each other, wherein the first common rail comprises a first housing, a pressure detecting device mounted on the first housing and a pressure adjusting device. The first housing comprises a first urea inlet channel, a first urea outlet channel, at least one first feeding inlet connected to the first urea inlet channel and at least one first back-flow outlet connected to the first urea outlet channel. The pressure detecting device is connected to the first urea inlet channel. The pressure adjusting device can connect/disconnect the first urea inlet channel to/from the first urea outlet channel. Also disclosed are a urea injection system and the application of the common rail assembly.

Abstract: A weigh module (100) comprises a load cell (4), a supporting member (1), a connecting member (23) and a sealing member (3). The supporting member (1) comprises a receiving hole (13) extending vertically and thoroughly. The connecting member (23) comprises a fixing end (231) fixed to the load cell (4) and a limiting end (232) extending into the receiving hole (13). The limiting end (232) is configured to prevent the supporting member (1) from getting rid of the connecting member (23). The sealing member (3) comprises a first end (311) fixed to the supporting member (1), a second end (321) fixed to the load cell (4) and a raised portion (323).

Abstract: The present disclosure provides a connector protection method in which the connector is used to connect a first device and a second device, and the method includes, a first detection unit of the first device detects a first parameter of the first device; a first controller of the first device obtains a second parameter from the second device through the communication line in the connector; and the first controller determines whether the connector is faulty based on the first parameter and the second parameter.

Abstract: Compositions and methods for efficiently producing and delivering double stranded RNA (dsRNA) are provided. Vector constructs useful for in vitro and in vivo expression of dsRNA are described. Also described are cell expression systems for efficient and cost-effective production of dsRNA in living cells and methods and compositions for providing the expressed dsRNA to target organisms. The described compositions and methods can be used to produce RNA molecules for screening or other uses, and to amplify RNA sequences for analysis.

Abstract: The present invention discloses a connecting rod-type lower limb exoskeleton rehabilitation robot, comprising a treadmill, two pneumatic muscle frames, two transmission devices and two lower limb exoskeletons; the pneumatic muscle frame includes a thigh rotating shaft, a calf rotating shaft, a hip joint shaft, pneumatic muscles and a support frame; the transmission device includes a thigh transmission mechanism and a calf transmission mechanism; the thigh transmission mechanism is a parallel four-connecting-rod mechanism composed of a thigh rotating arm, a thigh connecting rod and a thigh skeleton; the calf transmission mechanism includes two four-connecting-rod mechanisms; and the lower limb exoskeleton is connected to the pneumatic muscle frame through the transmission device.

Abstract: The present application discloses a vehicle searching method and device, which can perform the steps of: calculating an appearance similarity distance between a first image of a target vehicle and several second images containing the searched vehicle; selecting several images from the several second images as several third images; obtaining corresponding license plate features of license plate areas in the first image and each of the third images with a preset Siamese neural network model; calculating a license plate feature similarity distance between the first image and each of the third images according to license plate feature; calculating a visual similarity distance between the first image and each of the third images according to the appearance similarity distance and the license plate feature similarity distance; obtaining a the first search result of the target vehicle by arranging the several third images in an ascending order of the visual similarity distances.

Abstract: A quantum memory system includes a doped polycrystalline ceramic, a magnetic field generation unit, and one or more pump lasers. The doped polycrystalline ceramic is positioned within a magnetic field of the magnetic field generation unit when the magnetic field generation unit generates the magnetic field, the one or more pump lasers are optically coupled to the doped polycrystalline ceramic, and the doped polycrystalline ceramic is doped with a rare-earth element dopant that is uniformly distributed within a crystal lattice of the doped polycrystalline ceramic.

Abstract: Methods, systems, and computer-readable storage media for generation of a vehicle repair plan. Implementations include actions of receiving vehicle damage data including an image of a damaged vehicle. The vehicle damage data is processed to determine a component region. The component region is processed to determine a damaged area and a damage type of a portion of the damaged vehicle. A maintenance plan is generated for the damaged vehicle based on the damaged area and the damage type. The maintenance plan is initiated for the damaged vehicle.

Abstract: Methods, systems, and computer-readable storage media for generation of a vehicle repair plan. Implementations include actions of receiving vehicle damage data including an image of a damaged vehicle. The vehicle damage data is processed to determine a damaged area and a damage type of a portion of the damaged vehicle. A repair plan is generated for the damaged vehicle based on the damaged area and the damage type. The repair plan is initiated for the damaged vehicle.

Abstract: Methods, systems, and computer-readable storage media for generation of a vehicle repair plan. Implementations include actions of receiving vehicle damage data including an image of a damaged vehicle. The vehicle damage data is processed to determine a first vehicle component. The first image is matched to a second image to determine a second vehicle component within the second image. The second vehicle component is processed to determine a damaged area and a damage type of a portion of the damaged vehicle. A maintenance plan is generated for the damaged vehicle based on the damaged area and the damage type. The maintenance plan is initiated for the damaged vehicle.

Abstract: A cooling system for optical fiber drawing is used for decreasing the temperature of an optical fiber before coating, avoiding the occurrence of bubbles in a coating, ensuring a stable coating state of the optical fiber, and reducing the amount of helium gas used, being suitable for high-speed drawing. The cooling system consists of shutters of the cooling pipe; a helium gas guiding device, a cooling pipe body, a cooling water circulation and cooling device, a coating diameter control system, a cooling water pipe and a gas pipe. Several single-section cooling pipes are connected to each other by the gas intake connection devices. The outer wall of each segment of the cooling pipes is covered with a polystyrene foam thermal insulating layer, and the helium gas guiding device guides the gas within the pipe at a suitable guiding flow rate to achieve the optimal cooling effect.

Abstract: Compositions and methods for efficiently producing and delivering double stranded RNA (dsRNA) are provided. Vector constructs useful for in vitro and in vivo expression of dsRNA are described. Also described are cell expression systems for efficient and cost-effective production of dsRNA in living cells and methods and compositions for providing the expressed dsRNA to target organisms. The described compositions and methods can be used to produce RNA molecules for screening or other uses, and to amplify RNA sequences for analysis.

Abstract: A method of manufacturing a doped polycrystalline ceramic optical device includes mixing a plurality of transition metal complexes and a plurality of rare-earth metal complexes to form a metal salt solution, heating the metal salt solution to form a heated metal salt solution, mixing the heated metal salt solution and an organic precursor to induce a chemical reaction between the heated metal salt solution and the organic precursor to produce a plurality of rare-earth doped crystalline nanoparticles, and sintering the plurality of rare-earth doped nanoparticles to form a doped polycrystalline ceramic optical device having a rare-earth element dopant that is uniformly distributed within a crystal lattice of the doped polycrystalline ceramic optical device.

Abstract: The invention relates to a molecular sieve modification method and a catalytic cracking catalyst containing a molecular sieve. The method comprises: mixing a solution containing an ion of a Group MB metal in the periodic table, an organic complexing agent, and/or a dispersant and a precipitation agent, and stirring the same to form a suspension containing a precipitant of a Group IIIB element; and mixing the resulting precipitant and a molecular sieve slurry, stirring the same to obtain a mixed slurry containing the precipitant of the Group MB element and a molecular sieve, and performing spray drying and optional calcination, to obtain a modified molecular sieve. The catalyst comprises, as calculated based on the catalyst mass being 100%, 10-55% of a modified molecular sieve (on a dry basis), 10-80% of clay (on a dry basis), 0-40% of an inorganic oxide (on an oxide basis), and 5-40% of a binding agent (on an oxide basis). The catalyst has good activity stability and heavy metal contamination resistance.

Abstract: A preparation method for modified molecular sieve and a modified molecular sieve-containing catalytic cracking catalyst. The preparation method comprises: mixing molecular sieve slurry, a compound solution containing ions of group IIIB metals of the periodic table of elements, organic complexing agent and/or dispersing agent and precipitating agent to obtain mixed slurry containing molecular sieve and precipitates of group IIIB elements in the periodic table of elements; and drying, and roasting or not roasting to obtain molecular sieve modified by the group IIIB elements. A weight ratio of group IIIB elements calculated based on oxides to molecular sieve dry basis is equal to (0.3-10):100, a molar ratio of organic complexing agent to ions of group IIIB metals is equal to (0.3-10):1, and a molar ratio of dispersing agent to the ions of group IIIB metals is equal to (0.2-16):1. Also related to is the catalytic cracking catalyst containing the modified molecular sieve prepared according to the method.