34 results about "Shape gradient" patented technology

The invention discloses a construction method of a high-tension water-rich extra-large-section weak breccia tunnel. The method includes the steps of exploring distribution of fault weak breccia in front of a tunnel face by an advanced geological forecast method; distributing L-shaped gradient drain holes in two inner sides of the tunnel, providing sector drain holes and grouting holes, and allowing upper grouting and lower drainage; providing a combined cylinder grout-stopping wall, and performing a full-face advanced chemical grouting consolidation; constructing an advanced long tube shed with a circumferential closed advanced tube shed guide wall having a foundation, distributing tapered quincunx examining drain holes to detect grouting effect, and finally excavating the tunnel. Through the use of the techniques such as three-layer stereoscopic grouting and drainage, and cement-water glass and epoxy resin sequential grouting, the problem that a high-tension water-rich surrounding rock area with loose weak breccia has ineffective grouting consolidation and non-obvious water plugging effect is solved.

The invention relates to a device for testing a model with a three-dimensional gradient nonuniform loading structure, which comprises a table-shaped gradient nonuniform loading device and an opposite force loading device, wherein the opposite force loading device is connected with the table-shaped gradient nonuniform loading device which is arranged in the opposite force loading device; and a table-shaped gradient loading module of the table-shaped gradient nonuniform loading device is tightly attached to the surface of a testing model. Because the deep underground chamber engineering in the fields of hydroelectric power, traffics, power sources, resources and defense construction usually lies in three-dimensional loading states which are nonuniformly distributed in a gradient, the table-shaped gradient loading module is arranged on the surface of the model, thus the model testing device achieves the three-dimensional gradient nonuniform loading of an underground structure model and more truly discloses the nonlinear deformation characteristics and failure mechanisms of wall rocks of the deep underground chamber through the testing of the three-dimensional gradient nonuniform loading structure model so as to more reasonably evaluate the stability of the wall rocks of the underground chamber and take effective reinforcement measures, thereby having a quite important significance to guiding the design and the construction of the deep underground engineering and guaranteeing the safety of the deep underground engineering.

The invention discloses a fixed frequency beam scanning leaky-wave antenna and a beam scanning method thereof. The antenna comprises a dielectric substrate, a metal strip and a metal floorboard positioned on front and back surfaces of the dielectric substrate, and a plurality of variable capacitance diode positioned on the front surface of the dielectric substrate, wherein the metal strip comprises a set of arc-shaped gradient microstrip structures and an artificial surface plasmon structure positioned between the gradient microstrip structures; the artificial surface plasmon structure comprises transition sections connected with the gradient microstrip structures and a plurality of groove units with periodically changed groove depth positioned between the transition sections; and the metal strip is connected with the metal floorboard via the variable capacitance diode and through holes. According to the antenna and the beam scanning method thereof provided by the invention, modulation on average surface impedance is achieved by adjusting the capacitance value of the variable capacitance diode, and fixed frequency beam scanning can be achieved along with the change of voltage; in addition, the antenna is simple to manufacture, convenient to operate and prone to integrate; and only a photoetching step is needed, so that cost is saved, machining errors caused by a multi-layer structure are avoided.

The invention discloses a high-efficient cold air circulation air curtain system of a display cabinet. The system comprises a cabinet body and a cold air circulation air curtain circulation device arranged in the cabinet body, wherein the cold air circulation air curtain circulation device is provided with an air duct, an air outlet and an air return port opposite to the air outlet; and when the cold air circulation air curtain circulation device works, the airflow blown to the air return port from the air outlet forms a cold air circulation air curtain. An extrusion plate is arranged outside the air outlet; a baffle plate which is used for enabling the airflow velocity to have a gradient effect from the outer layer to the inner layer is arranged at the connecting part of the air outlet and the air duct; and the baffle plate is arranged in the air duct in a protruding mode. According to the invention, the airflow velocity and the direction of the cold air at the air outlet are changed; through the match of the extrusion plate and the baffle plate, the air curtain velocity has a parabolic shape gradient effect from the outermost layer to the innermost layer; the highest point of the air curtain velocity is formed in the inner layer of air curtain; the refrigeration effect of the cold air is improved; and the whole display cabinet has a purpose of saving energy and reducing consumption.

The invention belongs to the field of metal surface modification, and particularly relates to a hydrophilic / hydrophobic area synergistic water-collecting patterned surface and a preparation method thereof. The surface involves constructing a super-hydrophilic pattern of a tree-like array structure on a super-hydrophobic copper substrate, wherein the tree-like array structure is formed by the up and down connection of a plurality of patterns with shape gradient. The method comprises the following steps of cleaning the surface of a copper sample; corroding the cleaned copper surface through using alkaline solution; conducting low surface energy chemical modification on a super-hydrophilic copper surface; and using optical fiber laser to conduct ablating a pattern with the tree-like array structure on a super-hydrophobic copper surface so as to obtain the super-hydrophilic pattern, and finally the hydrophilic / hydrophobic area synergistic water-collecting patterned surface can be obtained.According to the hydrophilic / hydrophobic area synergistic water-collecting patterned surface and the preparation method thereof, the defects of large aggregation of droplets in a single hydrophilic area, low nucleating density in a single hydrophilic area and the like are solved; and in addition, the super-hydrophilic pattern has shape gradient, so when the surface is vertically placed, under thedual effects of the Laplace pressure and gravity force, the droplets in a single hydrophilic area can quickly fall off from the surface, thus achieving high efficiency in water collecting.

The invention relates to the subtitle rendering technology of TV programming field, in particular to a subtitle rendering method based on a pixel space mask matrix model. The method confirms the attribute value of a pixel space mask matrix, carries out texture mapping, shape gradient radial color filling and anti-aliasing processing on subtitle object by establishing the pixel space mask matrix, a texture image matrix and a shape gradient color array according to the polygon vector outline of the subtitle object. The invention makes the subtitle system have the advantages of excellent practicality, general applicability, complete and expansible function and programming and broadcasting timeliness, consequently the increasing requirement of a TV program programming and broadcasting mechanism over subtitle quality, subtitle effect and the like can be met.

The invention relates to a bionic structure with fog collection capability, and belongs to the technical field of fog collection. The bionic structure with the fog collection capability aims at solving the problem of shortage of fresh water resources existing in the prior art. The bionic structure with the fog collection capability is of a semi-conical structure; and a plurality of grooves which are dispersed in the axial direction are formed in the outer surface of the semi-conical structure from the tip to the root, and a plurality of pits are formed in the bottom of each groove from the tipto the root. According to the bionic structure with the fog collection capability, the semi-conical structure shape forms a shape gradient, so that water droplets condensed on the surface of the semi-conical can move from the tip to the root under the action of laplace pressure; and dispersed groove structures form roughness gradients on the surface of the semi-conical structure, the surface energy of the root is enabled to be larger than that of the tip, and the movement of the water droplets from the tip to the root is promoted. In addition, the pits in the grooves form a "pinning effect",and the directional collection of the water droplets is promoted.

The invention discloses a water leakage repairing process for an air face. The water leakage repairing process for the air face comprises the following steps: cutting a brick wall built on a wall bodyof the air face at first to form a construction portion; then coating an interface waterproof agent; planting bars between upper brick bodies and a lower concrete floor of the construction portion; pouring expand anti-permeability concrete; after the concrete is solidified, chiseling out a 'V'-shaped groove in an internal corner portion; then coating the interface waterproof agent; sealing the 'V'-shaped groove by using a waterproof sealant; reinforcing and blocking the internal corner by using repairing mortar, wherein the internal corner has arc-shaped gradient; then brushing a first air face waterproof coating; adding anti-cracking polyester textile on a connection portion between the internal corner and the wall body on the top; then brushing a second air face waterproof coating; whitewashing flatly by using repairing mortar; finally, laying ceramic tiles by using wet mortar after coating the ground portion with ceramic tile glue; and scraping and flattening a wall surface portionby using an external wall putty coating. By structural design, various waterproof materials are combined to a process, and thus, the problem of water leakage of the air face is solved systematacially.

The invention discloses a planar microstrip patch antenna with broadband end-fire circular polarization characteristics. The antenna comprises a single-layer dielectric substrate, an upper metal patchand a lower metal patch, wherein the single-layer dielectric substrate comprises a bent metal wall, a coaxial feed probe and a loading metal probe which are arranged sequentially; the coaxial feed probe is used to feed the energy of the antenna; the bent metal wall is used as a reflection cavity; the loading metal probe is used for adjusting the impedance matching performance of the antenna; theupper metal patch and the lower metal patch sequentially comprise rectangular patches, arc-shaped gradient slot apertures, feed strips and fan-shaped dipole patches from one side to the other side; the arc-shaped gradient slot aperture is used for exciting a vertical polarization component; the feed strip is used for transferring the energy to the fan-shaped dipole patch; and a horizontal polarization component is excited by the fan-shaped dipole patch. The broadband circular polarization radiation function of the planar microstrip patch antenna is realized, and the planar microstrip patch antenna has the advantages of simple structure and wide common bandwidth of impedance and axial ratio.

The invention discloses a composite molecular sieve film based on paper-shaped gradient metal microfibers as well as a preparation method and an application thereof. The preparation method of the composite molecular sieve film comprises the steps of dosing a tackiness agent, a metal fibre and water according to the weight ratio at 1 to (1-3) to (100-500), utilizing a wet method paper technology to prepare a front driving body, sintering to prepare a paper-shaped sintering metal microfiber carrier with a three-dimensional network structure, utilizing a NaOH water solution and a H2SO4 water solution to soak, and sintering so as to obtaining the carrier; utilizing cetyl trimethyl ammonium bromide, ethyl orthosilicate and ammonium hydroxide to prepare a seed crystal; enabling a seed crystal solution to dissolve in an ethanol solution so as to obtain a molecular sieve powder impregnation liquid, putting the carrier into the molecular sieve powder impregnation liquid to soak, drying so as to obtain the paper-shaped sintering metal microfiber carrier of a pre-planting plant; washing and calcining a product after secondary growth so as to obtain the paper-shaped gradient metal microfiber composite molecular sieve film. The composite molecular sieve film provided by the invention has the advantages of being continuously compact, adjustable in thickness, applicable tp the wet-type catalytic oxidation of phenolic wastewater, and high in reaction efficiency.

The invention provides a method for shaping a gradient-straight-hole double-layer asymmetric ceramic oxygen separation membrane by a freeze drying and tape casting method. According to the method, a tape casting process and a gradient straight hole forming process by freeze drying are combined, a raw membrane band body in a specific thickness is prepared by the tape casting process and is then transferred onto a low-temperature freezing bed; a water-base slurry is quickly frozen and cured on the freezing bed, and in the cuing process, gradient straight ice crystals are formed inside the raw membrane band body; the raw membrane band body is finally transferred into a vacuum kettle, the ice crystals in the raw membrane band body is directly evaporated into vapor in the low-temperature and vacuum condition, and the gradient straight holes are reserved at the positions of the ice crystals. The method has the advantages that the asymmetric membrane with the gradient straight hole structures is low in tortuosity, high in porosity and the like, remarkable reduction of concentration polarization in the ceramic oxygen separation membrane is hopeful, and oxygen penetrating quality and energy utilization rate of the ceramic oxygen separation membrane are increased.

The invention relates to a preparation method for a three-dimensional-network-shaped gradient composite functional film, and a product thereof. The preparation method comprises the following steps: spraying a nanometer microcrystalline cellulose suspension onto the surface of a nanofiber substrate, and carrying out drying and molding so as to form the gradient composite functional film. The prepared gradient composite functional film has a great specific surface area, a small pore size, high porosity and a large number of reaction bits. A heavy metal ion adsorption material prepared by subjecting the film and polybasic carboxylic acid to surface grafting has a heavy metal ion adsorption rate of no less than 99%; and the disadvantages of complex process, high cost and proneness to secondary pollution of common metal ion chelating agent processes are overcome. An organic matter degrading material prepared by subjecting the film and a photocatalyst to surface grafting has an organic matter removal rate of no less than 99% and has an antibiosis rate of 99.9999% after ultraviolet irradiation for 10 min.

The invention discloses a structural design and preparation method for a self-driven paper-based micro-fluidic chip composed based on a strip-shaped gradient array and a wedge-shaped flow channel. Theself-driven micro-fluidic chip is composed of two parts, namely the wedge-shaped flow channel and the strip-shaped gradient array, wherein the wedge-shaped flow channel provided the Laplace pressuregradient, the strip-shaped gradient array is arranged in the wedge-shaped flow channel, wetting gradient force is provided by changing the hydrophilic and hydrophobic area fraction. According to the structural design and preparation method for the self-driven paper-based micro-fluidic chip provided by the invention, compared with other gradient wetting surfaces, a wetting gradient surface formed by the strip-shaped gradient array and the wedge-shaped flow channel can provide larger wetting driving force, and the self-driving of liquid drops is easier to realize; by means of the design method,auxiliary equipment such as an external force driving system can be removed in a plane micro-fluidic system, and miniaturization and portability of the micro-fluidic system are easier to realize, andin addition, required equipment is simple, the operation is simple and convenient, and as for the preparation environment, the implementation can be carried out in air.

The invention discloses a design method of a GIL (gas insulated transmission line) insulator with surface conductance two-dimensional Lambda-shaped gradient distribution. The method mainly comprises the following steps that: an epoxy resin insulation test piece is firstly prepared; the epoxy resin is treated through using a stepped curing method; linear gradient design is performed on the surfaceof the epoxy resin basin type insulator: the surface of the insulator is divided into five closely connected annular regions from inside to outside, and the surface conductance of the insulator is designed to increase at first and then decrease; and the test piece is placed in a fluorination treatment device, and different positions of the test piece are treated for different time according to a monotonic distribution gradient, so that a basin type insulator with surface conductance gradient distribution can be obtained. Gradient fluorination treatment is performed on the epoxy resin, so thatsurface conductance two-dimensional Lambda-shaped gradient distribution can be obtained, and therefore, the performance of the insulator can be improved.

The invention provides a paper-based microfluidic chip used for detecting glucose concentration based on length changes in a color band. The difference in the length of the color bands formed by glucose solutions of different concentrations in the detection flow path of the self-driving paper-based microfluidic chip in wetting gradient formed by strip-shaped gradient arrays and wedge channels is used to establish a standard library in which glucose concentration and the length of color bands thereof flowing on the self-driving paper-based microfluidic chip with the wetting gradient formed by the strip-shaped gradient arrays and the wedge channels are one-to-one corresponding. When glucose concentration is measured, a glucose solution to be detected is aspirated with a dropper. The length of the color band formed by the glucose solution in the detection flow path is measured and compared with the length of the color bands in the established glucose standard library. The length of the color band of glucose concentration of the same length is matched. The concentration of the glucose solution to be detected can be detected. The method has the advantages of simple operation and being convenient and economical, and can accurately detect the concentration of the glucose solution.

The invention discloses a dual-line polarized ultra-wideband compact antenna. The dual-line polarized ultra-wideband compact antenna includes two identical antipode Vivaldi antenna bodies which are arranged to be in a T shape at a 90-degree right angle, the antipode Vivaldi antenna bodies are of a single-layer dielectric structure, and metal plates are arranged on both sides of a dielectric layer.Specifically, (1) radiation patches with Y-shaped gradient slits are located on both sides of the single-layer dielectric layer and are composed of exponential gradient sections which act as radiation roles; (2) chip resistors are connected to the tail ends of the radiation patches, parasitic patches are connected to the other ends of the chip resistors, and the chip resistors are located on bothsides of the single-layer dielectric layer; (3) the parasitic patches are loaded with four parallel rectangular slits correspondingly and located on both sides of the single-layer dielectric layer; and (4) a parallel double-line structure which is different from a traditional balun structure is adopted in a feeding transmission section. The characteristics of compact ultra-wideband and double-line polarization can be realized, the advantages of simple structure and convenient processing are achieved, and mass production can be carried out by using a printed circuit technique.

The embodiment of the invention provides a regional security method and system based on face recognition. The method comprises the following steps of extracting a criminal suspect feature set through a multi-overlapping face recognition algorithm; calculating a fan-shaped angle according to the escape direction of the criminal suspect, sending the criminal suspect feature set to an identification device in a fan-shaped region by taking the place of the criminal suspect identified by the identification device as a circle center in a fan-shaped gradient diffusion mode, starting a criminal suspect wandering program, and returning a wandering result when finding that the criminal suspect is hit; when the fan-shaped region touches the transportation hub, sending a criminal suspect prompt to a passage control device in the transportation hub, monitoring and intercepting the criminal suspect in real time, and returning an interception result to the security management department; and when the fan-shaped region touches the residential region, sending a criminal suspect prompt to an access control system of the residential region, forbidding the criminal suspect to enter, and returning an interception result to the security management department. According to the invention, the regional security efficiency is improved.

The invention discloses a method for using a foam light material for casting an annular proving road in situ.The method comprises the following steps that a basal surface and an arc-shaped gradient face of the annular proving road are segmented according to the construction cross section; a forming die of an arc-shaped gradient face area on each layer is manufactured according to the segmented arc-shaped gradient face areas; a base body where the basal face area is located is cast in a layered mode; the forming die of the segmented arc-shaped gradient area on the bottommost layer is installed, and casting is carried out according to the forming die; when initial setting intensity of foam light soil on the former layer is larger than 0.3 Mpa, the segmented arc-shaped gradient face area on each layer is cast for the next time until casting is completed.The constructed foam light soil is adopted for casting the annular proving road, construction is convenient, construction speed is high, and the construction period is shortened.By segmenting the whole arc-shaped gradient face into different areas, the forming dies are prefabricated better, construction is convenient, and the different construction requirements are met.

The invention relates to an ultra-wideband microstrip antenna, in particular a multi-order alternately-nested recursive hollowed ring ultra-wideband antenna. The multi-order alternately-nested recursive hollowed ring ultra-wideband antenna has the advantages of high impedance bandwidth, low return loss, high gain, excellent radiation characteristic, simple structure and easiness in processing, and can be excellently applied to UWB (Ultra-Wide Band) communication systems. A dielectric substrate is provided; a favorable conductor layer is laid on the upper surface and the lower surface of the dielectric substrate respectively; the favorable conductor layer at the upper surface of the dielectric substrate is provided with a radiating patch which is provided with a multi-order alternately-nested recursive hollowed ring and adopts a rectangular microstrip feeder to perform feeding; the basic structure contours of multi-order alternately-nested recursive structures are square and circular; a circular groove is formed at the interior of the square radiating patch so as to form a hollowed ring structure, and next-order square and circular alternately-nested structures are formed sequentially at the interior of the circular groove so as to from recursive hollowed ring structures, and therefore, the multi-order alternately-nested recursive hollowed ring can be formed; and the favorable conductor layer at the lower surface of the dielectric substrate is provided with multi-order ladder-shaped gradient electromagnetic coupling ground plates which are in bilateral symmetry; and the width of the multi-order ladder-shaped gradient electromagnetic coupling ground plates varies gradually.

The invention discloses a parametric modeling method of a pyramid-shaped gradient lattice structure. The parametric modeling method comprises the following steps: reading geometric dimension parameters of aircraft wings; establishing a three-dimensional entity model according to the geometric dimension parameters, and cutting the three-dimensional entity model to obtain a unit cell model of a pyramid-shaped gradient lattice structure; parameterizing the unit cell model, optimizing parameters through a control equation, and obtaining a pyramid-shaped gradient lattice structure. Only parametricdesign needs to be carried out, so that manpower and material resources are greatly reduced for design of an aircraft wing model, modeling does not need to be carried out again even if parameters of the structure change, the workload is reduced, parameter representation is unified, seamless integration with existing computer aided design software can be achieved, operation is easy, and errors arenot likely to happen. The invention relates to the technical field of aerospace finite element simulation analysis.

The invention discloses an implanted circularly polarized antenna loaded with a gradient structure for wireless biomedicine. The installation of an X-shaped groove inside a radiation patch can extendthe effective current path on the surface of the radiation patch and further reduce the size of the antenna. Loading a umbrella-shaped gradient structure can increase the capacitance distribution perunit length, increase a propagation constant, shifts the antenna resonance frequency to the low frequency, and reduces the size of the antenna. Installing a semicircular groove can increase new resonance points, thereby widening the bandwidth. The long rectangular grooves in upper and lower arched grooves introduce geometric perturbation so as to form two orthogonal components with equal amplitudes and a phase difference of 90 degrees, thereby resulting in circular polarization characteristics. The antenna only has a size of 9*9*0.635mm3, has the characteristics of anti-interference, miniaturization, a wide frequency bandwidth, circular polarization, and excellent biocompatibility, is easy to be integrated into an implantable wireless biomedical device, is suitable for ISMM2.45GHz band, and can meet the working needs after implanted into human tissues.

The invention discloses a blowing-type office supply placing device with circulating air flow. The device structurally comprises a left clamping plate, ventilation ports, partition plates, an upper attachment plate, a right clamping plate, a front baffle, a lower attachment plate, partition devices, a wire and a switch. According to the blowing-type office supply placing device with the circulating air flow, air supply cavities and arc-shaped gradient plates can be driven by a motor rotating shaft to rotate, paper faces at the two sides are circularly jacked away from each other from bottom totop through air permeable ports, a channel is reserved in the middle for a folder to be placed in, the folder is prevented from being abraded by the paper faces, an inflation pile is full of air through an air blower to push blowing rings out in the direction of limiting plates, paper at the bottom is pushed upwards, the contact faces of the paper from top to bottom are moved to both sides, and the folder is more easily put in.

The invention relates to a vertical field type MRI apparatus provided with a superconducting coil system 20a, 20b for generating a substantially homogeneous magnetic field in an imaging volume 18 of the apparatus. The coil system includes a circular outer coil 28 and a supplementary coil 30 which is positioned in the same plane 32 as and within the outer coil, which coils conduct opposite currents. The ratio Da / Do of the diameter Da of the supplementary coil to the diameter Do of the outer coil lies between 0.7 and 0.9. Further coils 34 to 38, 40 to 46 for making the field even more homogeneous are preferably located on a conical surface 48, 50 within the first mentioned coils 28, 30 in such a manner that a recess is formed in which a conically shaped gradient coil system 52 can be accommodated, with the result that the expensive outer coil 28 and the supplementary coil 30 can be arranged at an as short as possible distance from the space for receiving the patient to be examined.