119results about How to "Improve the restraint effect" patented technology

The invention relates to the technical fields of surface plasmon optical waveguide structures and provides an antisymmetric-high energy mode surface plasmon optical waveguide structure capable of low-loss transmission for overcoming a large loss drawback of the conventional metal/media/metal waveguide transmission. The optical waveguide structure realizes a waveguide structure for supporting transmission in an antisymmetric-high energy mode by combining the refractive index difference between a plurality of high refractive index layers and a low refractive index substrate and a low refractive index covering layer and a surface plasmon effect of a metal layer and uses the low refractive index medium layers on two sides of the metal layer to reduce transmission loss, thereby realizing low-loss surface plasmon optical waveguide. Meanwhile, the optical waveguide structure has the advantages of small effective mode filed area and low loss can be used for manufacturing optical devices of a subwavelength size and ultra high integration level optical circuits.

The invention discloses a face image super-resolution method based on local and sparse non-local regularities. The face image super-resolution method comprises the following steps of 1, obtaining image blocks of all pixel positions of a test image and a training sample image; 2, using a local PCA dictionary learning method, using a K-means clustering algorithm to divide and cluster the image blocks of the training sample image blocks, and learning a local PCA dictionary by each cluster; 3, for a low-quality image block, solving an optimal representation coefficient vector by applying a local constraint and sparse non-local dual-core norm regularization algorithm; 4, synthesizing a high-resolution image block on the high-resolution dictionary by using the optimal representation coefficientvector, updating a non-local coding coefficient, and putting the updated coefficient and the high-resolution image block into the step 3 for next iteration; A high-resolution image block is obtained through multiple times of iterative updating; And step 5, outputting a high-resolution image. The method has the advantage of improving the image quality.

The invention discloses a steel screen restricted column plastic hinge region concrete structure and a making method thereof, and belongs to the technical field of building engineering construction. In the invention, the binding of steel screens outside the steel reinforcement cage of a column plastic hinge region provides a good restriction effect for concrete, can prevent the early shedding of concrete and improves the column ductility. The making method concretely comprises the following operation steps: steel reinforcement cage binding, steel screen cutting, steel screen bending, steel screen installation, and column formwork and concrete pouring and vibration. The steel screen restricted column plastic hinge region concrete structure effectively raises the rotation capability of the column plastic hinge region, improves the column ductility and improves the concrete work state.

The invention discloses a novel high-gain, wide-angle scanning lens antenna based on a stepped medium, belonging to the technical field of microwave and millimeter wave antennas. The antenna includesa lens antenna and a patch antenna feed array horizontally positioned below the lens antenna. The lens antenna includes an upper spherical shell portion, a lower circular table portion, and an inner sector spherical portion which are fitted tightly. The different thickness and dielectric constant of each part of the lens antenna can effectively collect electromagnetic wave, readjust the amplitudeand phase of electromagnetic wave, and achieve high gain. The contour of the lower circular table can refract electromagnetic wave effectively. Based on the placement position of the feed array of thepatch antenna, the large-angle scanning can be realized effectively. The invention can be used in millimeter wave communication system and radar communication, and has the advantages of ensuring highgain and scanning in a large range at the same time, simple power feeding, small number of feed sources, convenient installation and low cost.

The invention relates to a carbon fiber strip reinforced structure component. The carbon fiber strip reinforced structure component comprises a structure component and a carbon fiber strip coated on the outer surface of the structure component, wherein the carbon fiber strip is spirally wound and pressed on the outer surface of the structure component. The invention also provides an implementation method of the carbon fiber strip reinforced structure component. The implementation method is characterized by comprising the following steps: (1) winding the head end of the carbon fiber strip; (2) axially and spirally winding and pressing the carbon fiber strip along the structure component; (3) winding the tail end of the carbon fiber strip. The carbon fiber strip is used for coating the structure component, so that the purpose of reinforcing the structure component is achieved; the head end and the tail end of the carbon fiber strip are respectively subjected to press-in winding and tying treatment, so that the purpose of self locking and anchoring is achieved; the carbon fiber strip is not required to be bound by a flammable adhesive, so that the carbon fiber strip still has high restraint effect on the structure component under the high-temperature breakage; the carbon fiber strip has the advantages of high temperature resistance, long service life and environment friendliness.

The invention discloses a touch key structure and a touch device. The touch key structure comprises a metal touch panel, wherein a plurality of metal keys are arranged on the touch panel, the keys and the touch panel are isolated through an insulation layer, and the touch panel is ground; a detection board is arranged below the touch panel, a plurality of electrodes corresponding to the keys are arranged on the detection board, and the detection board and the touch panel are in insulation isolation; and areas between the plurality of keys and the electrodes form flat capacitors. The touch key structure and the touch device have better restraint effect of an induction range, and avoid the interference of adjacent keys during touch identification.

The invention provides a preparation method for a metal-matrix composite enhanced by porous Si3N4/SiC multiphase ceramic, and relates to a preparation method for a ceramic-enhanced metal-matrix composite. By adoption of the preparation method for the metal-matrix composite enhanced by the porous Si3N4/SiC multiphase ceramic, the technical problems that an existing ceramic-enhanced metal-matrix composite is high in thermal expansion coefficient, and reinforcement bodies are prone to agglomeration and cannot be dispersed evenly are solved. The preparation method for the metal-matrix composite enhanced by the porous Si3N4/SiC multiphase ceramic comprises the steps that firstly, slurry is prepared; secondly, the porous Si3N4/SiC multiphase ceramic is prepared; thirdly, surface modification of the porous multiphase ceramic is conducted; and fourthly, the composite is prepared. According to the preparation method for the metal-matrix composite enhanced by the porous Si3N4/SiC multiphase ceramic, the pore diameter of the porous multiphase ceramic is small, growth of metal grains in the composite is restrained, and the comprehensive mechanical property of the composite is effectively improved through fine crystal enhancement; Si3N4/SiC nanowires in the porous multiphase ceramic are evenly distributed; ceramic enhancement bodies in the metal-matrix composite are distributed continuously, so that the metal-matrix composite has a low thermal expansion coefficient; and the metal content is high, so that the composite has high thermal conductivity.

The invention discloses a turbofan engine thrust prediction method and a turbofan engine thrust prediction controller based on a neural network. The turbofan engine thrust prediction method comprisesthe steps of: establishing a steady-state multiple-input multiple-output neural network model of turbofan engine key gas path measurement parameters; using the neural network model as a prediction model for designing a thrust model prediction controller; designing a certain type of turbofan engine closed-loop control system by using the model prediction controller, and studying tracking performance and constraint performance of a thrust control system. On the basis of considering the existing control constraint conditions of an engine, the turbofan engine thrust prediction method utilizes thesteady-state neural network model combined with an SQP optimization algorithm, regards the minimum error of unmeasurable thrust performance parameters of the engine as a target, designs the thrust prediction controller, calculates a control quantity of the engine, is simple in structure, and has a positive promoting effect on reduction of the workload of designing the controller and suppression ofthrust performance degradation of the controller.

The invention relates to a laminated rubber support reinforced by combining fine high-strength steel wire meshes with steel fibers. The laminated rubber support consists of rubber bodies, fine high-strength steel wire meshes, outer-layer protecting rubber and steel fibers, wherein the fine high-strength steel wire meshes are thick meshes woven by high-strength steel wires, and the fine high-strength steel wire meshes are closely distributed in the rubber bodies layer by layer to restrain the side deformation of the rubber bodies, so that the support has rigidity and load-bearing capacity required by normal use; steel fiber materials are distributed in rubber in disorder, so that the mechanical property of the rubber bodies is improved, the connection of the fine high-strength steel wire meshes and composite rubber materials is closer, and the restraining effect is enhanced; favorable deformation capacity of the fine high-strength steel wire meshes and the connection action of the steel fibers ensure that the rubber bodies and the high-strength steel wire meshes can still synergistically work under the condition of extreme deformation, and the problems of adhesive failure and the like cannot occur. Under the action of earthquake, the laminated rubber support allows larger shearing deformation until upper and lower surfaces completely break away from a contact surface to present an overturning state and even generate horizontal scrolling, the earthquake force of an upper structure is prevented from being transmitted to a lower structure, the effect of earthquake insulation is exerted, and the safety of a bridge structure is ensured.

The invention relates to the technical field of endoscopes, in particular to an endoscope self-locking device and an endoscope. The self-locking device comprises a shell and a rotating handle, a firstlocking piece is fixedly arranged in the shell, a rotating shaft is rotatably connected in the first locking piece, and a locking mechanism used for being matched with the first locking piece is movably connected to the rotating shaft; the locking mechanism comprises a base, a push rod and a second locking piece, the base is fixedly connected to the shell, the interior of the base is connected tothe push rod through a thread, the push rod penetrates through the base and the shell, the push rod is used for pushing the second locking piece, the second locking piece is movably connected to therotating shaft, and the second locking piece moves in the axial direction of the rotating shaft; and the push rod controls the second locking piece to be matched with the first locking piece to realize self-locking. Self-locking can be achieved by the rotating handle, locking of an insertion tube is achieved, the imaging stability of the insertion tube is guaranteed, and meanwhile the fatigue strength of an operator is reduced.

The invention discloses a built-in polyvinyl chloride (PVC) pipe enhanced square steel pipe concrete combined column, which comprises a PVC circular plastic pipe, a square steel pipe and concrete, wherein the PVC circular plastic pipe in which the concrete is grouted is embedded in the center of the section of the square steel pipe; and the concrete is grouted in a residual space on the section of the combined column to form a double-sleeve multi-constraint concrete combined column in which one pipe is embedded into another pipe. The combined column has the advantage of improving the comprehensive performance of the square steel pipe concrete column; by the PVC circular pipe, and due to the multiple constraint effect, a constraint effect of the concrete in the column is improved, so that the axial compression strength of the column is improved; furthermore, under the condition that requirements on the bearing capacity and the vibration resistance are met, the sectional area of the column can be greatly reduced by using the cheap PVC plastic pipe, so that the usability of a building space is improved; and the consumption of steel and comprehensive manufacturing cost are reduced.

The invention discloses a constraint handling device for a biaxial tension and compression concrete test piece. The device comprises two first structural unit sheets, two second structural unit sheetsand a first third structural unit sheet. The third structural unit sheet is arranged horizontally as a bottom structure of the device, and a reserved test piece position line is arranged in the middle for positioning and placing the concrete test piece; snap joints connected to the third structural unit sheet are arranged on the bottom edges of the first structural unit sheets and the second structural unit sheets; two side edges of the first structural unit sheets are detachably connected to one side edges of the two second structural unit sheets, separately, to form a square side frame structure, and sticky gypsum pouring space is formed among the concrete test piece, the first structural unit sheets and the second structural unit sheets. By attaching a protecting layer to the tensionedand compressed surface of the concrete test piece, the anti-attrition constraint action of a loading plate on concrete can be improved effectively, so that the testing accuracy of a test is improved.

The invention relates to an assembled four-piece combined circular steel pipe concrete inner support structure and a manufacturing method, and belongs to the technical field of support and support in foundation pits of subway stations. The prefabricated four combined circular steel pipe concrete inner support structure includes different types of circular steel pipe concrete straight supports. Including short straight stay and standard straight stay. The straight supports are connected to each other by high-strength bolts. All components are composed of ultra-high-strength concrete filled round steel pipes, and the cross-sections of four round steel pipes are arranged in a square. The present invention satisfies the splicing needs of supports in foundation pits of different lengths by combining different forms of component lengths, and provides an assembled combined circle with high rigidity, reusability and low cost, which can be used as internal supports in the foundation pit or shaft enclosure structure system The inner support structure of concrete filled steel tube can effectively solve the problems of complex construction and high cost of concrete support. The comprehensive benefit is remarkable, and it has important engineering application value and development prospect.

The invention relates to an assembled three-piece combined circular steel pipe concrete inner support structure and a manufacturing method, which belong to the technical field of support and support in foundation pits of subway stations. The prefabricated three combined circular steel pipe concrete inner support structure includes different types of circular steel pipe concrete straight supports. Including short straight stay and standard straight stay. The straight supports are connected to each other by high-strength bolts. All components are composed of ultra-high-strength concrete filled round steel pipes, and the cross-sections of the three round steel pipes are arranged in an inverted triangle. The present invention satisfies the splicing needs of supports in foundation pits of different lengths through the combination of different forms of component lengths, and provides a high rigidity, reusable, cost-reduced assembly-type combined circle used as internal supports in the foundation pit or shaft enclosure structure system The inner support structure of concrete filled steel tube can effectively solve the problems of complex construction and high cost of concrete support. The comprehensive benefit is remarkable, and it has important engineering application value and development prospect.

The invention provides a precast steel tube concrete ring beam structure and a construction method. The structure comprises a steel tube concrete column, a steel tube concrete ring beam and a precastreinforced concrete beam, wherein the steel tube concrete column comprises an upper steel tube column, a lower steel tube column, connecting plates, stiffening ribs and column concrete; the pluralityof connecting plates and stiffening ribs are welded at the lower end of the upper steel tube column and the upper end of the lower steel tube column; the stiffening ribs are vertically arranged on corresponding connecting plates; the column concrete is poured inside the upper steel tube column and the lower steel tube column; the steel tube concrete ring beam comprises ring beam steel tubes, anchor bars and ring beam interior reinforced concrete; the ring beam steel tubes comprise upper steel plates, lower steel plates, side steel plates and inner steel tubes; and the upper steel plates and the lower steel plates are respectively arranged at the upper and lower ends of the side steel plates. The precast steel tube concrete ring beam structure disclosed by the invention is high in bearing capacity, high in stiffness, excellent in seismic ductility, excellent in integrity, convenient and rapid in construction, high in construction quality and capable of realizing shift-away of plastic hinge, and meets the requirements of 'strong column and weak beam, strong joints'.

The invention relates to the technical field of endoscopes, in particular to an endoscope self-locking device. The device comprises a shell and a rotating handle, a first locking piece is fixedly arranged in the shell, a rotating shaft is rotatably connected into the first locking piece, and a locking mechanism used for being matched with the first locking piece is movably connected to the rotating shaft; the locking mechanism comprises an operating rod, a rolling wheel, a locking piece, a wedge-shaped block and a second locking piece, the locking piece is connected to the operating rod, the operating rod is matched with the wedge-shaped block, the wedge-shaped block is arranged on the second locking piece, the second locking piece is movably connected to the rotating shaft, and the secondlocking piece can only move in the axial direction of the rotating shaft; and the operating rod controls the second locking piece to be matched with the first locking piece to achieve self-locking, and meanwhile the locking piece locks the operating rod. Self-locking can be achieved by rotating the handle, locking of an insertion tube is achieved, the imaging stability of the insertion tube is guaranteed, and meanwhile the fatigue strength of an operator is reduced.

The invention relates to a children's operation restraining strap in stomatological department. The children's operation restraining strap comprises a cloth liner, wherein a head restraining strap I, a shoulder restraining strap I and a shoulder restraining strap II are arranged at one end of the cloth liner; a chest and abdomen retraining strap I and an arm retraining strap I are arranged at one side of the cloth liner; a chest and abdomen retraining strap II and an arm retraining strap II are arranged at the other side of the cloth liner; a head retraining strap II and a head retraining strap III are arranged on the head retraining strap I and are respectively arranged at two sides of the head retraining strap I close to the cloth liner; the cloth liner is detachably installed on a dental chair. The children's operation restraining strap is capable of well retraining a child; occurrence of accidents of a children patient caused by swinging of his head and twisting of his body during operation can be prevented, thus safety of the children patient is guaranteed. The children's operation restraining strap is simple in structure and convenient to use, has good retraining effect and is particularly applicable to clinical use.

The invention provides a method for solidifying a steel pipe column through external sleeveing of circular steel pipe concrete. The method is characterized by comprising the following steps that (1), polishing and derusting are conducted on the surface of an original steel pipe column; (2), an externally-sleeved circular steel pipe is installed on the periphery of the original steel pipe column, and the original steel pipe column is wrapped with the externally-sleeved circular steel pipe; and (3), filling materials are poured between the original steel pipe column and the externally-sleeved circular steel pipe. According to the method for solidifying the steel pipe column through external sleeveing of the circular steel pipe concrete, a steel pipe concrete structure is applied to the solidifying process of the steel pipe column, and a method for local solidifying or overall solidifying of a damaged steel pipe column through externally-coated steel pipe concrete is provided; when local solidifying is conducted, the externally-sleeved steel pipe mainly has a hooping effect, and when overall solidifying is conducted, the externally-sleeved steel pipe can jointly bear the pressure and has the hooping effect, so that a new thought is provided for the solidifying method of the steel pipe column.