42results about How to "Promote theoretical research" patented technology

The invention belongs to the digital image processing technical field and relates to a Fourier optical modeling-based coded aperture camera image restoration method. In order to decrease dependence on actual photographing and reduce noise error introduced by manual photographing, the imaging mode of a coded mask optical imaging system is quantitatively analyzed, and finally, the point spread function of a coded aperture camera can be obtained, and the point spread function is adopted as prior data to restore an image. According to the technical scheme of the invention, the Fourier optical modeling-based coded aperture camera image restoration method includes the following steps that: (1) a coded mask imaging system is quantitatively analyzed, and the coded mask imaging system generates a simulation point diffusion function of a coded aperture camera under arbitrary depths; and (2) with the point diffusion function under arbitrary depths in the step (1) adopted as a fuzzy kernel, de-convolution is performed on scene images photographed by the same coded aperture camera, and a simulation result is optimized according to a maximum posterior probability MAP principle, and the image of the original scene can be obtained. The Fourier optical modeling-based coded aperture camera image restoration method of the invention is mainly applied to digital image processing.

The invention discloses a meshless RKPM-based two-dimensional thermal deformation and stress analysis method for an anisotropic material structure. The method mainly comprises the following steps of (1) performing RKPM node discrete preprocessing on a calculation model; (2) solving an RKPM thermal deformation displacement value: assembling RKPM overall force stiffness matrix and overall thermal load column vector; applying a boundary, and processing a first boundary condition by adopting a penalty function method; establishing a meshless RKPM thermal stress discrete control equation of the anisotropic material structure, and solving the RKPM thermal deformation displacement parameter value of a node; (3) solving an RKPM thermal stress value: performing approximation on the obtained thermaldeformation displacement parameter value by adopting reproducing kernel approximation to calculate out a thermal stress of a Gaussian point, thereby obtaining the RKPM thermal stress value of the node; and (4) post-processing a calculation result. The two-dimensional thermal deformation and stress analysis of the anisotropic material structure is performed based on a meshless RKPM; and a numerical method is stable and high in precision.

The invention relates to a preparation method of hydroxyl-terminated hyperbranched polyurethane. The operation steps include that 1 hydroxyl-terminated micromolecule polyhydric alcohol is dissolved in a non-proton organic solvent to obtain a hydroxyl-terminated micromolecule polyhydric alcohol solution; 2 the temperature of diisocyanate is raised to 70-90 DEG C, the hydroxyl-terminated micromolecule polyhydric alcohol solution is added, catalyst is added, and a reaction is conducted to obtain first generation hyperbranched prepolymer a1; and 3 the temperature of the first generation hyperbranched prepolymer a1 and di-alkanolamine is reduced to 0-15 DEG C, the temperature is kept, a reaction is conducted after blending, and products are separated and purified through precipitator and vacuum-dried to obtain first generation hydroxyl-terminated hyperbranched polyurethane A1. A synthesizing process is good in controllability, and the synthesized hyperbranched polyurethane is high in purity and neat in structure, contains large amount of terminated hydroxyl and is suitable for being used as a biological medicine carrier, a cross-linking agent, a viscosity modifier, a thermosetting material curing agent, a phase solubilizer, a rheological agent, thixotrope, a nucleating agent and the like.

Speed-regulated amortisseur for turning quality belongs to field of antiknock and reducing cataclysm. The existing TMD has problems of slow enabling and bad controlling effects under frequency disturbance. Its technical route is: TMD can attain the needed motion amplitude quickly by giving impulse to its quality block, which can improve its controlling effect for percussion load. Magnetic rheostat can be used to lock functions of TMD and major structure, adjust displacement relation of TMD and structure and reduce depression of controlling effect caused by frequency disturbance. The controlling effect of the invention acted by percussion load under the condition of reduce depression is batter than that of traditional passive TMD. It has on energy problem resolved difficultly by active control while great shaking. The invention is easy to realize and has low cost.

The invention discloses a method for simultaneously measuring double-domain induced polarization full parameters. A time domain method is adopted to record and display a potential difference and a curve formed by a cycle repeated signal sent by a power supply electrode between measuring electrodes; synchronization of transmission and receiving of signals are automatically achieved by mathematical treatment; and by calculation, the real part and the imaginary part of a fundamental wave and a harmonic wave are solved according to the obtained synchronized potential difference and curve so as to further calculate apparent resistivity, apparent absolute phase position, apparent amplitude diffusivity and view diffusivity. When the apparent resistivity and the apparent absolute phase position are measured, apparent polarization rate, an apparent charging rate and an attenuation curve are calculated according to a charging curve or a discharging curve at the same time. A time domain (interrupted rectangular wave) power supply mode can be independently adopted and a frequency domain (continuous rectangular wave) power supply mode can also be independently adopted so as to realize the purpose of simultaneously measuring the double-domain induced polarization full parameters in one-time power supply. According to the method, the technical problem of providing more information which can reflect polarization body characteristics and correlated information in short one-time measurement time can be solved.

The invention discloses an equal-flow area conical screw-sleeve pair, which belongs to the application field of single-screw pumps. A conical sleeve comprises an inner curved conical sleeve surface, a big conical sleeve end surface, a small conical sleeve end surface, and an outer cylindrical conical sleeve surface; a big conical screw end surface and the big conical sleeve end surface compose an inlet end of the conical screw-sleeve pair; and a small conical screw end surface and the small conical sleeve end surface compose an outlet end of the conical screw-sleeve pair. The flow area of one section of the conical screw-sleeve pair is defined as a difference between the area of the inner curved conical sleeve surface and the area of an outer curved conical screw surface in the section. The equal-flow area characteristic and equal-cavity characteristic of the conical screw-sleeve pair can help increase the displacement of a single-head conical screw pump and reduce pressure fluctuation, so that flow is smoother; moreover, pressure rise from the inlet end to the outlet end is relatively small, relative sliding speed is low in the process of movement, consequently, abrasion is reduced, and the service life is prolonged.

The invention discloses a method and purpose for constructing a TCM spleen deficiency syndrome AIDS monkey model. Among existing AIDS experimental animals, a monkey resembles to mankind the most. The inventor successfully constructs an HIV infected rhesus monkey TCM spleen deficiency syndrome composite model by two methods respectively. The first method is to carry out gavage with raw rhubarb concentrate to a create spleen deficiency syndrome and then carry out intravenous injection of infected SIV viruses. The second method is to carry out gavage with raw rhubarb concentrate to create the spleen deficiency syndrome after rhesus monkeys is infected with SIV viruses through intravenous injection. Based on the understanding of infection course, pathogenic processes and pathological changes of AIDS viruses in a spleen deficiency syndrome model, research on attack of infected target organs, target tissue and target cells to the immune system, on response of cells of the immune system, on the evolution law of a TCM syndrome, etc., is carried out. The established TCM spleen deficiency syndrome HIV infected monkey composite model in the invention plays an irreplaceable role in studying TCM pathogenesis and evolution of symptomatology of TCM for AIDS and in evaluating drug effects of anti-AIDS TCMs and compounds.

The invention discloses a temperature-sensitive plugging colloid for oil and gas fields, a preparation method and a use method thereof, wherein the plugging colloid comprises, by weight, 55-75 parts of modified polyacrylamide, 10-25 parts of a trivalent cross-linking agent, 5-20 parts of a water-soluble slow-release agent, and 45-65 parts of a water phase. According to the present invention, the modified polyacrylamide, the trivalent cross-linking agent, the water-soluble slow-release agent and the water phase are subjected to multi-phase physical adsorption and chemical pre-cross-linking wrapping granulation to obtain the product, such that the prepared temperature-sensitive plugging colloid has the delayed slow release and controllable cross-linking characteristics of temperature-sensitive swelling and temperature-controlled cross-linking, meets the intellectualization design requirement, has characteristics of low-temperature delayed adhesion and medium-high temperature control cross-linking, has characteristics of high strength and unblocking resistance after cross-linking, and has good theoretical research and practical value in the comprehensive treatment of leakage layers with a well temperature of 60-90 DEG C.

The invention provides a mask evaluation method for a coded mask optical imaging system and a mask structure code pattern. The mask evaluation method relates to three evaluation indexes including M1, M2 and RA. According to the mask structure code pattern, periodic arrangement is conducted on multiple square units which are completely identical in structure and meet the requirements of the Dammann optical grating structure, and then the square array structure is formed. The square array structure is an N*N array, wherein N is a positive integer and is larger than or equal to 3. By the adoption of the mask evaluation method for the coded mask optical imaging system and the mask structure code pattern, the coded mask optical imaging system is described based on the mask structure and the characteristics of a lens assembly, the point spread function of the system can be obtained more rapidly and more conveniently, the preparation process of manufacturing, construction and debugging of a real system is omitted, and operation errors possibly caused during actual measurement are avoided; the regulation function of different code pattern structures on the point spread function of the coded mask optical imaging system can be described objectively and can be used as the evaluation basis of the influence of the code pattern structures on the imaging quality of the whole system, and finally instructive suggestions are provided for design and optimization of the code pattern of coded masks of such imaging systems.

The invention discloses a cable-strut tension structure rod piece section optimization method and system based on importance analysis. The method comprises the following steps: (1) for a to-be-optimized cable-strut tension structure, obtaining importance coefficients of all types of rod pieces in a normal load state of the to-be-optimized cable-strut tension structure; (2) selecting a rod piece with the maximum importance coefficient, and reducing the importance of the type of rod piece to the minimum value to serve as an optimization target; (3) performing global optimization by taking the sizes of the cross sections of various rod pieces as optimization parameters to obtain optimized cross section areas of the rod pieces; and (4) obtaining an optimized cable-strut tension structure. Thesystem comprises an optimization target selection module, an iterative optimization module and a rod piece importance analysis module. Aiming at the technical problem that a cable-strut tension structure is lack of effective structural performance-based optimization design, the cross section is optimized, so that the importance coefficient of the strut member with the maximum strut member importance coefficient is as small as possible, and the strut member importance of a target category is effectively reduced after optimization.

The invention discloses a riser motion response simulation device based on combination of floating structure wave frequency and slow drift. The riser motion response simulation device comprises a movable water tank, a top excitation loading device, a test sample tube and a data acquisition system. The movable water tank comprises a stainless steel plate, a tempered glass plate and the like; the top end excitation loading device is composed of an H-shaped steel stand column, a T-shaped side plate and a hydraulic servo double-frequency excitation loading device and arranged on the right side ofthe movable water tank. The test sample tube comprises a silicone tube and cylindrical syntactic foam, the top end is connected with the top end excitation loading device, and the tail end is connected with the inner wall of the movable water tank. According to the test device, the transmission process and motion characteristics of double-frequency excitation response generated by the floating structure along the slow wave type flexible vertical pipe under the action of wind wave flow are studied, so that a system acquired data analysis result obtained through an indoor model test can providea reference basis for configuration design and theoretical analysis of the deepwater flexible vertical pipe.