Abstract: A method for monitoring hydraulic fracturing range of a surface vertical shaft is provided by the present disclosure, belonging to the technical field of ultrahigh-pressure hydraulic fracturing monitoring of the coal mine vertical shafts.

Abstract: A method for detecting an open flame includes: acquiring a plurality of frames of first images of a suspected target in a monitoring region; acquiring gray scale change features of the plurality of frames of first images and attribute features of the suspected target based on the plurality of frames of first images, the gray scale change features being configured to indicate temperature changes of the suspected target; and determining the suspected target in the monitoring region as an open flame, if the gray scale change features of the plurality of frames of first images and the attribute features of the suspected target both satisfy an open flame condition.

Abstract: The present invention discloses an automatic sensitivity testing method for a dual-crystal ultrasonic probe and a flaw detection system. The sensitivity automatic testing method does not require a standard test block; and an emitter and an echo pole of the dual-crystal ultrasonic probe emit and receive interface waves independently of each other: the wafer of the emitter or the echo pole generating an ultrasonic wave, the end face of the dual-crystal ultrasonic probe performing emission to form an interface wave, and the interface wave being received by the wafer generating the ultrasonic wave; or the emitter and the echo pole of the dual-crystal ultrasonic probe being in parallel to form an emitting and echo pole; and the wafer emitting the echo pole generating ultrasonic waves, and the end face of the dual-crystal ultrasonic probe performing emission to form an interface wave, which is received by the wafer emitting the echo pole.

Abstract: Disclosed is a complex tFNA-miR22 for treating optic nerve disease, which complex is composed of tetrahedral DNA and miR-22 according to a molar ratio of 1:(1-4). The tFNA-miR22 can effectively inhibit apoptosis of retinal ganglion cells and promote the release of a brain-derived neurotrophic factor (BDNF), thereby achieving a good protection effect for the retinal ganglion cells. The tFNA-miR22 is used for preparing optic nerve protection drugs, the treatment of neurodegenerative optic nerve diseases including glaucoma is facilitated, and the tFNA-miR22 has very good application prospects.

Abstract: A single-shot differential phase contrast quantitative phase imaging method based on color multiplexing illumination. A color multiplexing illumination solution is used to realize single-shot differential phase contrast quantitative phase imaging. In the single-shot color multiplexing illumination solution, three illumination wavelengths of red, green, and blue are used to simultaneously illuminate a sample, and the information of the sample in multiple directions is converted into intensity information on different channels of a color image. By performing channel separation on this color image, the information about the sample at different spatial frequencies can be obtained.

Abstract: The present invention discloses a three-dimensional diffraction tomography microscopy imaging method based on LED array coded illumination. Firstly, acquiring the raw intensity images, three sets of intensity image stacks are acquired at different out-of-focus positions by moving the stage or using electrically tunable lens. And then, after acquiring the intensity image stacks of the object to be measured at different out-of-focus positions, the three-dimensional phase transfer function of the microscopy imaging system with arbitrary shape illumination is derived. Further, the three-dimensional phase transfer function of the microscopic system under circular and annular illumination with different coherence coefficients is obtained as well, and the three-dimensional quantitative refractive index is reconstructed by inverse Fourier transform of the three-dimensional scattering potential function. The scattering potential function is converted into the refractive index distribution.

Abstract: A method for monitoring hydraulic fracturing range of a surface vertical shaft is provided by the present disclosure, belonging to the technical field of ultrahigh-pressure hydraulic fracturing monitoring of the coal mine vertical shafts.

Abstract: A single-shot differential phase contrast quantitative phase imaging method based on color multiplexing illumination. A color multiplexing illumination solution is used to realize single-shot differential phase contrast quantitative phase imaging. In the single-shot color multiplexing illumination solution, three illumination wavelengths of red, green, and blue are used to simultaneously illuminate a sample, and the information of the sample in multiple directions is converted into intensity information on different channels of a color image. By performing channel separation on this color image, the information about the sample at different spatial frequencies can be obtained.

Abstract: The patent discloses a differential phase contrast (DPC) quantitative phase microscopy method based on the optimal illumination pattern design. Firstly, the optimal illumination pattern corresponding to the isotropic phase transfer function of DPC quantitative phase imaging is derived, which is determined as a semi-annular illumination pattern with the illumination numerical aperture NAill equal to the numerical aperture NAobj of the objective lens. The illumination intensity distribution varies with the cosine of the illumination angle, and it can be expressed as S(?)=cos(?). This patent effectively compensates for the frequency loss of phase transfer, not only the high-frequency responses of PTF are enhanced, but also the transfer responses of low-frequency phase information is significantly improved.

Abstract: A method for detecting an open flame includes: acquiring a plurality of frames of first images of a suspected target in a monitoring region; acquiring gray scale change features of the plurality of frames of first images and attribute features of the suspected target based on the plurality of frames of first images, the gray scale change features being configured to indicate temperature changes of the suspected target; and determining the suspected target in the monitoring region as an open flame, if the gray scale change features of the plurality of frames of first images and the attribute features of the suspected target both satisfy an open flame condition.

Abstract: The present invention discloses a three-dimensional diffraction tomography microscopy imaging method based on LED array coded illumination. Firstly, acquiring the raw intensity images, three sets of intensity image stacks are acquired at different out-of-focus positions by moving the stage or using electrically tunable lens. And then, after acquiring the intensity image stacks of the object to be measured at different out-of-focus positions, the three-dimensional phase transfer function of the microscopy imaging system with arbitrary shape illumination is derived. Further, the three-dimensional phase transfer function of the microscopic system under circular and annular illumination with different coherence coefficients is obtained as well, and the three-dimensional quantitative refractive index is reconstructed by inverse Fourier transform of the three-dimensional scattering potential function. The scattering potential function is converted into the refractive index distribution.

Abstract: The patent discloses a differential phase contrast (DPC) quantitative phase microscopy method based on the optimal illumination pattern design. Firstly, the optimal illumination pattern corresponding to the isotropic phase transfer function of DPC quantitative phase imaging is derived, which is determined as a semi-annular illumination pattern with the illumination numerical aperture NAill equal to the numerical aperture NAobj of the objective lens. The illumination intensity distribution varies with the cosine of the illumination angle, and it can be expressed as S(?)=cos(?). This patent effectively compensates for the frequency loss of phase transfer, not only the high-frequency responses of PTF are enhanced, but also the transfer responses of low-frequency phase information is significantly improved.

Abstract: Systems and methods are provided for monitoring vehicle usage. An exemplary method implementable by a server may comprise: obtaining information of one or more vehicles available to provide transportation and one or more transportation requests; matching one or more of the transportation requests with one of the vehicles to determine a planned transportation; determining a first reward to a first user associated with the matched vehicle and a second reward to one or more second users associated with the matched transportation requests; obtaining tracking data of the matched vehicle to determine whether the matched vehicle has started and ended a transportation in compliance with the planned transportation; and in response to determining that the matched vehicle has started and ended the transportation in compliance with the planned transportation, transferring the first reward to the first user and transferring the second reward to the one or more second users.

Abstract: Systems and methods are provided for monitoring vehicle usage. An exemplary method for monitoring vehicle usage implementable by a server may comprise: determining a planned transportation to be carried out by a vehicle associated with a first user; obtaining tracking data of the vehicle to determine whether the vehicle has started and ended a transportation in compliance with the planned transportation; and in response to determining that the vehicle has started and ended the transportation in compliance with the planned transportation, transferring a first reward to the first user.

Abstract: The present invention provides a soybean oligopeptide with low allergenicity and little bitterness and its preparation method and application. The preparation method includes the following steps: 1) mixing a soybean protein powder with water to obtain a soybean protein solution, and then performing thermal denaturation on the soybean protein solution, to prepare a denatured protein solution; 2) adjusting pH value of the denatured protein solution to 6-9, and then adding a neutral protease and papain to conduct a first enzymolysis, to obtain a first enzymatic hydrolysate; 3) adding an alkaline protease and a flavor protease into the first enzymatic hydrolysate to conduct a second enzymolysis, and after performing enzyme inactivation, to obtain a second enzymatic hydrolysate; and 4) centrifuging the second enzymatic hydrolysate, and performing membrane filtration on centrifuged supernatant liquid, to obtain the soybean oligopeptide with low allergenicity and little bitterness.