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258results about How to "Improve restraint" patented technology

Tight sandstone reservoir modeling method

The present invention discloses a tight sandstone reservoir modeling method. The tight sandstone reservoir modeling method comprises the steps of: taking drilling and logging information as constraints to perform lithology inversion based on post-stack three-dimensional seismic interpretation data to obtain a plurality of inversion data volumes; comparing the inversion data volumes with a logginginterpretation conclusion to optimize an inversion data volume which can most reflect different lithologies; determining a lithology partition criterion according to the dependency of lithology data interpreted from the logging and the values in the optimized inversion data volumes; obtaining a three-dimensional logging lithology data volumes through lithology identification of the values of the inversion data volumes in each three-dimensional grid in the three-dimensional space based on the lithology partition criterion; setting virtual wells at the main body centers of sedimentary facies andthe internal portion of each boundary, and determining the values in the three-dimensional lithology data volumes corresponding to the virtual wells as the lithology data of the virtual wells; and taking the lithology data of the actual drilling wells and the virtual wells as modeling basic data to perform random simulation modeling to obtain a three-dimensional reservoir lithology model so as toachieve the purpose of fine description of the reservoir.
Owner:CHINA PETROLEUM & CHEM CORP +1

Steel-encased concrete steel column with built-in spiral stirrup

The invention belongs to a building structure member in the technical field of building engineering, and particularly relates to a steel-encased concrete steel column with a built-in spiral stirrup. The steel-encased concrete steel column comprises longitudinal angle steels, horizontal connecting pieces, a spiral stirrup, a longitudinal reinforcement and core concrete, wherein each longitudinal angle steel is arranged in each corner of the column, the longitudinal angle steels are connected through horizontal connecting pieces, the horizontal connecting pieces are welded on the inner sides or the outer sides of a longitudinal angle steel flange plate to form a steel-encased framework, the longitudinal reinforcement is arranged on the inner wall of the spiral stirrup to form a spiral reinforcement cage which is arranged in the center of the steel-encased framework, the core concrete is filled in the internal space of the steel-encased framework to form the steel-encased concrete steel column with the built-in spiral stirrup. The steel-encased concrete steel column with the built-in spiral stirrup has the advantages of being high in bearing capacity, good in ductility, excellent in anti-seismic property, low in steel ratio, small in section dimension, convenient to construct, fast in progress and the like.
Owner:GUANGXI UNIV

Circular steel pipe concrete member constrained by steel pipe and provided with interlayer and machining method thereof

PendingCN106906951AImprove binding abilityPrevent or delay local bucklingStrutsPillarsPipeSeismic resistance
The invention discloses a circular steel pipe concrete member constrained by a steel pipe and provided with an interlayer and a machining method thereof. The novel circular steel pipe concrete member constrained by the steel pipe and provided with the interlayer is composed of the outer steel pipe, an interlayer material and a core steel pipe concrete member, and the outer steel pipe and the interlayer material only provide lateral constraint for the core steel pipe concrete; both of the outer steel pipe and the core steel pipe concrete member are circular; and the outer steel pipe is arranged along full length of the surface of the core steel pipe concrete member and not connected with the end of the core member and a beam column joint. According to the circular steel pipe concrete member constrained by the steel pipe and provided with the interlayer and the machining method thereof, co-working performance of the core member steel pipe and core concrete can be strengthened, the bearing capacity and ductility of the member can be improved, the failure mode of the member can be improved, and the seismic resistance, corrosion resistance and fire resistance of the member can be reinforced; and according to the circular steel pipe concrete member constrained by the steel pipe and provided with the interlayer and the machining method thereof, the principle is clear, mechanical performance is excellent and engineering cost is low.
Owner:HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL

Enhanced low-rank sparse decomposition model medical CT image denoising method

The invention relates to an enhanced low-rank sparse decomposition model medical CT image denoising method. The method comprises the following steps: determining the number and the size of similar blocks in a search window and an image block matrix and the maximum number of iterations during iterative solution according to a calculated noise intensity estimated value, traversing an original image,performing non-local similar block matching, and dividing the original image into a plurality of image block matrixes consisting of non-local similar blocks; carrying out low-rank matrix estimation on the medical CT original image D belonging to Rm*n by adopting a weighted Schatten p norm, and adding a joint constraint L1-2TV regularization item to construct an enhanced low-rank sparse decomposition model; sequentially inputting the image block matrixes into the model, and performing iterative solution by using an alternating direction multiplier method to obtain low-rank matrixes of the corresponding image block matrixes; and aggregating the low-rank matrixes corresponding to all the image block matrixes to obtain a denoised clean image. According to the method, more mixed noise can be separated as much as possible so as to obtain a better medical CT image denoising effect.
Owner:HEBEI UNIV OF TECH

Punched rib and pull rod constraint double-layer steel plate concrete shear wall

InactiveCN106049720AReduce in quantityEquilibrium of ConstraintsWallsBearing capacityShear wall
The invention discloses a punched rib and pull rod constraint double-layer steel plate concrete shear wall. The punched rib and pull rod constraint double-layer steel plate concrete shear wall comprises two opposite wall body steel plates, connection steel plates at the two ends of a wall body, filling concrete defined by the steel plates on the four sides, punched stiffening ribs and pulling rods penetrating through the punched stiffening ribs. The punched stiffening ribs are arranged on the inner side faces of the steel plates and connected through the pulling rods penetrating through holes. The pulling rods comprise the pulling rods in the wall length direction and the pulling rods in the wall thickness direction. The pulling rods in the wall length direction penetrate through the stiffening ribs arranged in the wall length direction and the connection steel plates at the two ends. The pulling rods at the two ends of the wall body in the wall thickness direction penetrate through the stiffening ribs in the wall thickness direction and the two opposite wall body steel plates. The pulling rods at other portions in the wall thickness direction are arranged between every two adjacent stiffening ribs arranged in the wall length direction every other 2-5 stiffening ribs, and are staggered with the pulling rods in the wall thickness direction along the wall height part at proper intervals. The bearing capacity and ductility of the shear wall can be improved.
Owner:HENAN POLYTECHNIC UNIV
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