Abstract: A method for online detecting and analyzing multiple state parameters in fermentation and malodorous pollution processes by using an electronic nose instrument of gas sensitivity and gas chromatography, where the electronic nose instrument includes a gas sensor array module, a capillary gas chromatographic column module, a gas auto-sampling module, a computer control and analysis module and an auxiliary gas source, which is configured to perform cyclically long-term online detection and intelligent analysis of a plurality of bio-fermentation processes or a plurality of malodorous pollution processes.

Abstract: A large area deposition type additive manufacturing equipment is disclosed. The large area deposition type additive manufacturing equipment includes a light source module, a dynamic photomask module, a raw material tank and a deposition module. The light source module includes a plurality of light emitting members, a light diffusion member, a light enhancement member and a light emitting angle limiter. Light emitted from the light emitting members passes through the light diffusion member, the light enhancement member and the light emitting angle limiter to become a collimated curing light. The collimated curing light travels through a transparent member of the raw material tank and a dynamic photomask module to reach liquid photocurable material in the raw material tank, thereby curing the liquid photocurable material. The angle of emitted light ranges within ±30° with respect to a normal line of an incident plane of the light source module.

Abstract: A method for preparing a high-performance difficult-to-deform metal precision seamless pipe includes steps of performing a heat treatment; drilling; externally grinding; internally grinding; straightening; performing four-roller warm-rolling; performing warm-drawing to reduce a diameter; performing warm-expansion to reduce a wall thickness and increase the diameter; performing precise cold-rolling; degreasing; brightening; performing surface grinding; cleaning dust; detecting flaws; testing metal structure performance; and sizing and packaging. By cycling the warm-drawing, the warm-expansion, and the precision cold-rolling, key indicators such as product dimensional accuracy, surface quality, material properties, and crystal grain size can be collaboratively controlled, to achieve higher accuracy, better performance, and more outstanding extreme specifications.

Abstract: The present disclosure provides a peanut whole-process production line and a method. The peanut whole-process production line includes a peanut cleaning system, a shell breaking system, a skin removing system, a peanut kernel classification system, an ultra-fine pulverization system and a classification packaging system; a first procedure is cleaning and impurity removal of peanuts, breaking of peanut shells is performed after the cleaning and impurity removal of peanuts, removal of peanut kernel skins and ultra-fine pulverization of the peanut shells are respectively performed after the breaking of peanut shells, classification of peanut kernels is performed after the removal of peanut kernel skins, and classification packaging of ultra-fine peanut shell powder is performed after the ultra-fine pulverization of the peanut shells; whole-process processing of peanuts is completed by using the peanut whole-process production line, and peanut resources are fully utilized.

Abstract: Systems and methods for correcting NMR T2 times are disclosed. The method may include creating a plurality of 3D rough surface pore models, where each 3D rough surface pore model includes a rough surface, for each of the plurality determining a pore roughness coefficient (PRC) and a volume; and simulating a first T2 relaxation time based on the 3D rough surface pore model. The method may further include determining a smooth surface pore model, with the same volume as the 3D rough surface pore model, and simulating a second T2 relaxation time based on the smooth surface pore model. The method may still further includes determining a T2 rough surface correction factor based on the first and the second T2 relaxation times, and forming a data pair comprising the pore roughness coefficient (PRC) and the T2 rough surface correction factor; and fitting a T2 correction curve to the data pairs.

Abstract: Provided in the present application are a speech recognition method, apparatus and device, and a storage medium. The method comprises: acquiring a speech feature of target mixed speech and a speaker feature of a specified speaker; taking the direction of tending to a target speech feature as an extraction direction, and according to the speech feature of the target mixed speech and a speaker feature of a target speaker, extracting a speech feature of the target speaker from the speech feature of the target mixed speech, so as to obtain an extracted speech feature of the target speaker and acquiring a speech recognition result of the specified speaker according to an extracted speech feature of the specified speaker.

Abstract: A control method, a control device and a wind farm system for a wind turbine frequency support are provided. The control method includes the following: calculating a comprehensive inertia power value by using a wind farm frequency modulation capability level coefficient when a frequency accident occurs in the wind farm; obtaining a real-time rotational speed of each wind turbine to calculate a state factor that changes in real time, where each wind turbine adjusts a state reference power value of its own by exchanging the state factor with a neighboring wind turbine; and determining instantaneous stator power of each wind turbine by using a MPPT part corresponding to the rotational speed, the comprehensive inertia power value, and the state reference power value, so as to control each wind turbine to perform frequency support until a predetermined frequency support time is reached.

Abstract: A double-sided ultrasonic rolling cooperative strengthening system and a control method thereof are provided. The system includes a first mechanical arm subsystem, a second mechanical arm subsystem, a first ultrasonic rolling strengthening subsystem, a second ultrasonic rolling strengthening subsystem and a servo turntable (13); the servo turntable (13) is configured to fix a blade to be processed; the first ultrasonic rolling strengthening subsystem is provided at an end of the first mechanical arm subsystem; and the second ultrasonic rolling strengthening subsystem is provided at an end of the second mechanical arm subsystem.

Abstract: An intelligent separation device has gas explosion, stirring, drying and negative pressure adsorption devices. The gas explosion device receives conveyed peanut materials with red coats to be removed, and the materials are subjected to gas explosion, so that the peanut kernels and the peanut red coats are preliminarily separated. The stirring device shifts the preliminarily separated peanut kernels and peanut red coats into the drying device. The drying device compresses and heating external air, transfers heat through hot air, and heats and dries the preliminarily separated peanut kernels and peanut red coats, so that the peanut red coats and the peanut kernels are fully separated. The negative pressure adsorption device collects the fully separated peanut kernels and red coats with different densities and masses in a negative pressure adsorption mode.

Abstract: A read and write circuit of a three-dimensional phase-change memory including an operation control circuit and a read and write operation circuit connected to each other. The operation control circuit is configured to load a correct operation pulse onto the read and write operation circuit. A read and write unit in the read and write operation circuit is connected to a memory cell and is configured to load the correct operation pulse onto the memory cell corresponding to the three-dimensional phase-change memory and to mirror the correct operation pulse to a mirror current. A bandgap reference source and a hysteresis comparator are connected to a mirror circuit branch. A feedback chopper circuit loop is connected across the memory cell and the mirror circuit branch and is configured to monitor a current flowing through the memory cell in real time.

Abstract: Rotational translation of an inertial mass rotor is used for providing damping of low frequency noise and vibration. An axial component is mounted so as to translate axial movement of an inertial linearly-displaceable member to rotational movement of an inertial mass rotor. The translation to rotational movement of the inertial mass rotor provides inertial amplification in the form of translational-rotational coupling. This enables the construction of a compact assembly, which allows light ultra-low frequency resonances to be concentrated, and which absorbs such low frequency noise energy.

Abstract: Disclosed is an underwater acoustic communication system based on a filter bank joint sub-carrier multidimensional index modulation and a method thereof. The system includes a transmitting terminal and a receiving terminal, the method is: conducting a joint index modulation at the transmitting terminal, firstly selecting an activated prototype pulse index by using a part of bits of a FBMC symbol, grouping the remaining transmitted information bits and all sub-carriers; using a part of the bits in each group to select the activated sub-carrier index, modulating the remaining bits to the activated sub-carriers by a constellation symbol mapping, forming a transmission signal after a filter bank modulation; and demodulating three parts of transmitted bits at a receiving terminal after an action of underwater acoustic channel, and recovering the original data bits by combining each part of decoding results.

Abstract: Disclosed is a method for recycling a coal liquefaction residue. The method includes S1, drying a coal liquefaction residue and pulverizing to obtain a pulverized coal liquefaction residue; S2, subjecting the pulverized coal liquefaction residue to a solvothermal extraction in an autoclave to obtain an extract liquid and a residue; S3, distilling the extract liquid and recovering an organic solvent to obtain a solid extract.

Abstract: A composition of matter is provided comprising hierarchically ordered crystalline microporous material having well-defined long-range mesoporous ordering of cubic symmetry. The composition possesses mesopores having walls of crystalline microporous material and a mass of mesostructure between mesopores of crystalline microporous material. Long-range ordering is defined by presence of secondary peaks in an X-ray diffraction (XRD) pattern and/or cubic symmetry observable by microscopy.

Abstract: The present invention discloses a ?-transaminase mutant obtained through DNA synthetic shuffling combined mutation. The ?-transaminase mutant is obtained through point mutation of a wild type ?-transaminase from Aspergillus terrus. The amino acid sequence of the wild type ?-transaminase is shown in SEQ ID NO: 1. The mutation site of the ?-transaminase mutant is any one of: (1) F115L-H210N-M150C-M280C; (2) F115L-H210N; (3) F115L-H210N-E253A-I295V; (4) I77L-F115L-E133A-H210N-N245D; (5) I77L-Q97E-F115L-L118T-E253A-G292D; (6) I77L-E133A-N245D-G292D; and (7) H210N-N245D-E253A-G292D. According to the present invention, forward mutations obtained in the previous stage are randomly combined through a DNA synthetic shuffling combined mutation method.

Abstract: A method for establishing a three-dimensional ultrasound image blind denoising model and a use thereof include: adding a speckle noise to three-dimensional biological structure images of a same size and without speckle noise to obtain a training data set; establishing a three-dimensional denoising network based on an encoding-decoding structure, wherein the encoding structure is used to obtain N feature maps of a three-dimensional input image and perform a downsampling to obtain feature maps of different scales; the decoding structure is used to take a feature map obtained by the encoding structure as an input and reconstruct a three-dimensional image without speckle noise through upsampling; dividing the encoding-decoding structure into a plurality of stages by a downsampling structure and an upsampling structure; training the three-dimensional denoising network using the training data set to obtain a three-dimensional ultrasound image blind denoising model.

Abstract: The disclosure discloses a thermal reawakening operation method and system for enhancing polarization of a hafnium-based ferroelectric film, belonging to the field of micro-nanoelectronic technology, which includes the following. S1. Heating is performed on the hafnium-based ferroelectric thin film. S2. A pulse voltage having multiple cycles is applied to the hafnium-based ferroelectric thin film. S3.The hafnium-based ferroelectric thin film is cooled to an initial temperature. In the disclosure, through the thermal reawakening operation, a certain amount of oxygen vacancies are generated, and the non-polarized phase is transformed into the polarized phase, the polarization value of the hafnium-based ferroelectric film can be significantly improved at a low cost and with a simple operation, thereby the performance of the hafnium-based ferroelectric device is significantly improved.

Abstract: The present disclosure relates to a polyindole-montmorillonite (Pind-mmt) complex and a preparation method and application thereof. The preparation method includes the following steps: subjecting mmt to cation saturation using ferric chloride, to prepare ferric ion-exchanged montmorillonite (Fe3+-mmt); and formulating an indole aqueous solution; adding Fe3+-mmt to the indole aqueous solution to enable indole molecules to generate Pind at mmt interlayer by in-situ polymerization, and obtaining a Pind-mmt complex body; and subjecting the Pind-mmt complex body to organic modification with quaternary ammonium salt cationic surfactant to obtain the Pind-mmt complex.

Abstract: The present invention provides a method for scalable fabrication of ultra-flat polycrystalline diamond membranes, the method comprising: (1) performing chemical vapor deposition on a growth substrate having diamond seeds thereon to grow a polycrystalline diamond membrane, wherein an exposed surface of the polycrystalline diamond membrane is a grown surface having a first roughness; and a surface bonded to the growth substrate is a buried surface; (2) bonding the grown surface to a transfer substrate using an adhesive; and (3) removing the growth substrate to expose the buried surface of the polycrystalline diamond membrane, wherein the buried surface has a second roughness after exposure, and the second roughness is less than the first roughness.

Abstract: An electromagnetic (EM) inspection tool for inspecting a pipe that includes a longitudinally extending body having a first end, a second end, and a central longitudinal axis. The EM inspection tool further includes a transmitter disposed proximate the first end and configured to generate an alternating EM field at a first frequency. The EM inspection tool further includes a first far-field receiver plate disposed proximate the second end, wherein the first far-field receiver plate includes a first far-field receiver disposed at a first radial location and a second far-field receiver disposed at a second radial location. The EM inspection tool further includes a first near-field receiver plate disposed circumferentially around the transmitter, wherein the first near-field receiver plate includes a first near-field receiver disposed at the first radial location and a second near-field receiver disposed at the second radial location.