135results about How to "Guaranteed structural performance" patented technology

The invention discloses a hyperspectral image classification method based on local cooperative expression and neighbourhood information constraint, and is mainly used for solving the problem of high computation complexity in the prior art. The hyperspectral image classification method comprises the following realization steps of: (1) forming a neighbourhood matrix by M samples in a neighbourhood of a hyperspectral image tested sample and a tested sample; (2) forming a dictionary by all training samples, and calculating a cooperative expression coefficient matrix of the neighbourhood matrix by the dictionary; (3) calculating 12 norms of each row of the coefficient matrix, selecting N atoms from the dictionary according to large N row marks of the 12 norms to form a sub dictionary, and calculating a cooperative expression coefficient of the tested sample by the sub dictionary; (4) dividing the cooperative expression coefficient and the sub dictionary into n parts according to the number of every class of training samples; and (5) calculating and comparing a residuals between the tested sample and each reconstruction of the n parts, wherein a class mark of the tested sample is corresponding to a subscript of the minimum residual. According to the hyperspectral image classification method disclosed by the invention, the local cooperative expression is used, thus reducing the quantity of the atoms and reducing the computation complexity; and the hyperspectral image classification method can be used for solving the problem of hyperspectral image classification.

The invention discloses a large-scale image retrieval method. The method comprises the steps of image feature extraction, Hash function projection vector learning, Hash function offset learning, image feature dimensionality reduction, image feature encoding and image retrieval. By adopting the method, a large scale of images can be retrieved rapidly. Firstly, the discrimination among codes is enhanced by learning a discriminant Hash function, thereby better distinguishing different types of image features; secondly, the image features are subjected to dimensionality reduction and encoding by using a Hash function, thereby lowering the storage demand of the image features and the computation overhead of a retrieving process. By adopting the large-scale image retrieval method, large-scale image retrieving is realized efficiently and accurately, thereby achieving a high application valve.

The invention discloses a tower frame door opening of a wind generating set and a design method of the tower frame door opening; the tower frame door opening consists of two straight line segments and a curve segment according to shape, and the curve segment consists of more than three circular arcs with different diameters. The thickness of a door frame of the tower frame door opening is 1.15 to 1.17 times of the thickness of a tower tube wall preferentially, the length of the door frame along the radial direction of a tower tube is 4.5 to 5.5 times of the thickness of the door frame preferentially, and the length of the door frame at the central height position of the door opening, which extends out of the tower tube wall, is about half of the length of the door frame along the radial direction of the tower tube. The actual design process of the tower frame door opening comprises an overall data design of a door frame section, a door frame section modeling, a stress concentration factor IIW (International Institute of Welding) interpolation calculation and the like. Firstly, obtain an optimized parameter of the shape of the curve segment at the door opening, secondly, based on the optimized parameter, perform a further optimization to a size parameter of the door frame. The tower frame door opening increases the mechanical property index and reduces the impact of the existing door opening on a tower tube structure.

The invention provides a replaceable energy consumption connecting assembly for connecting a fabricated frame beam column. According to the technical scheme, a replaceable energy consumption assembly is arranged at the connecting position of the fabricated frame beam column and consists of an energy consumption steel rod, a constraint part and a connecting part, one end of the replaceable energy consumption assembly is connected with a node anchor steel bar embedded into the column, and the other end of the replaceable energy consumption assembly is connected with a beam-end longitudinal steel bar embedded into a beam. Under an earthquake effect, the energy consumption steel rod yields prior to other members and parts and utilizes plastic hysteresis to consume earthquake energy. The replaceable energy consumption connecting assembly is used for connecting the fabricated frame beam column, can induce the plastic damage of the structure in a middle earthquake and a large earthquake to be concentrated on the energy consumption steel rod, the damage of abeam column member can be avoided while the seismic ductility of the structure is improved, and the structure can be rapidly repaired after the earthquake in a simple energy consumption part changing mode, so that the structure repair efficiency after the earthquake is remarkably improved. The application of the replaceable energy consumption connecting assembly meets the industrialization development requirements of buildings.

The invention discloses a filling and reinforcing method for processing complicated goafs. The method mainly includes grouting hole position selection and grouting pressure control, is combined with the filling method, and adopts diagonal grouting holes, safety risks of direct construction on the goaf ground surface are avoided, damages to integrities of other rocks on the upper portion are reduced, and stability and structuration of the goaf are guaranteed better; diagonal filling is adopted, reinforcement is performed gradually, the entire goaf is filled, bearing capacity of the entire goaf is improved, and strength requirements of the roof is guaranteed during seam mining; the interval grouting method and the manner of thinning firstly and thickening later are adopted, the fluency and filling rate of grout in subsided rocks are guaranteed, grout concentration is changed while accelerator is added properly, and the filling and reinforcing effect of the entire goaf is improved ultimately; the processing effect of filling and reinforcing is significant to the complicated goafs which have low mine rock integrity and which are still mined as required.

The invention belongs to the technology of composite material structure forming process, and relates to a manufacturing method for a pre-buried fiber grating composite material laminated plate. By utilizing the characteristic that a high-temperature fiber is good in storage of coating layer and better in tenacity under the conditions of high temperature and high pressure, the high-temperature fiber is combined with an ordinary fiber grating, the ordinary fiber grating and a portion of the high-temperature fiber are pre-buried in a composite material pre-forming structure, so that the defect that the fiber is easily broken during the demolding, transporting and processing process can be effectively avoided under the precondition that the sensing function of the grating is guaranteed and the structural performance of the composite material is guaranteed, and the survival rate of the pre-buried fiber grating is improved.

A preparation method of hollow fiber multihole biologic titanium material belongs to biotechnology field. The invention includes steps: (1) wrapping titanium or titanium alloy fiber on a compact core rod, shaping; (2) putting the core rod wrapped with titanium or titanium alloy fiber in a mould, compacting by a hollow pressure head having inner diameter equal to diameter of the compact core rod, keeping load under load pressure, removing the mould and the core rod to get hollow multihole rods or columns with required length and porosity; (3) putting multihole titanium rods or columns compacted as body, sintering in vacuum or argon atmosphere to get hollow fiber multihole biologic titanium material. The method of this invention is simple, can get slim hollow fiber multihole biologic titanium material having optional ratio of length and diameter, fibre distribute uniformly, surface is flatten via shaping; good controllability of central cavity size, aperture and porosity, simple preparation method, fast speed, high rate of finished products, low cost.

The invention relates to a cab design method based on a cab sound reduction index analysis. The cab design method comprises the following steps: (1) establishing a CAD (Computer-Aided Design) model of a cab assembly, carrying out mesh generation on the CAD model, and establishing a finite element model of the cab assembly; (2) based on the finite element model of the cab assembly, establishing a cab internal sound field and a cab external sound field; (3) according to the shape of a sealing strip in a current design drawing, establishing a finite element model of the sealing strip structure, and carrying out nonlinear static compression on the sealing strip according to a set amount of compression; (4) establishing a sound-solid-sound three-domain coupling model; (5) computing the sound reduction index of the cab; (6) judging whether the sound reduction index of the current cab meets the design requirement, if yes, taking the current design drawing as the final structure output of the cab, and otherwise modifying the shape and the amount of compression of the sealing strip in the design drawing, and returning to the step (3). Compared to the prior art, the cab design method disclosed by the invention has the advantages of reducing the internal noise of the cab, increasing the sound reduction index of the cab, improving the sealing performance, and the like.

The invention discloses a plasma arc-assisted MIG material increase manufacturing method for an aluminum alloy structure, and belongs to the technical field of 3D printing. The method includes the steps that an aluminum alloy substrate is selected at first; then a welding wire with the diameter being 1.2mm-1.6mm is selected; the relative position among a plasma arc nozzle, the aluminum alloy substrate and an MIG welding gun is determined, wherein the spacing range between the plasma arc nozzle and the aluminum alloy substrate is 5mm-10mm, the spacing range between the plasma arc nozzle and the MIG welding gun is 4mm-10mm, and the spacing range between the aluminum alloy substrate and the MIG welding gun is 10mm-15mm; the current range of a plasma arc is 40A-100A; the current range of the MIG welding gun is 100A-160A; and the current ratio range of the plasma arc to the MIG welding gun is 0.4-0.8. By the adoption of the method, stability is high, the heat input amount and heat-affected zone width can be effectively decreased, forming reliability is improved, and high-quality material increase manufacturing forming of the aluminum alloy structure can be facilitated.

A production method of a totally-coated metal composite pipe is technically characterized by including the steps of hermetically nesting a titanium tube, a steel tube and another titanium tube, connecting titanium heads to two ends of the steel tube in a threaded manner, and welding the inner titanium tube and the outer titanium tube on the titanium heads to ensure the steel tube is completely coated with titanium integrally; performing rolling, combining, rounding, straightening, deheading and sizing to obtain a finished product. According to the method, the totally-coated metal composite pipe is manufactured by a cold-rolling method. In terms of oil exploitation, chemical industry, fine chemicals, heat exchangers and marine pipelining, the composite pipe is completely coated with the titanium to keep properties of the titanium, product strength is guaranteed by using a low-cost base steel tube as a structural portion, the titanium heads at two ends can be connected by welding, and a screw thread can also be made for mechanical connection. The totally-coated metal composite pipe has the advantages such that the performance is high, the cost is low, the service life is long, and applicable range is wide. The production method is insusceptible to seasons and free of environmental pollution, and production scale and product specification are controllable.

The invention provides a buckling-restrained brace combined type embedded part construction method. A buckling-restrained brace combined type embedded part is adopted for construction, and the buckling-restrained brace combined type embedded part comprises buried part and a buried part locating component; the buried part comprises an upper plate, a lower plate, a web and a stud; the buried part locating component comprises a screw, a limiting thread sleeve, a locating adjustment nut and a gasket; the construction method mainly comprises the steps of formwork installation, buried part placing,main structure steel bar binding, buried part locating through the buried part locating component, concrete pouring and the like. According to the method, construction is convenient, the work efficiency is improved, the cost is reduced, and the problems that in the prior art, after buckling-restrained brace embedded parts are arranged on the main reinforcement and stirrups of the building main structure, binding construction is difficult, buckling-restrained brace embedded part locating, adjusting and reinforcing are difficult, deviation is likely to occur, buckling-restrained brace embedded part installation is time consuming and labor consuming, and the construction period is prolonged can be effectively solved.

The invention provides a multipoint geostatistics-based discrete fracture modeling method, which combines multipoint geostatistics modeling with a discrete fracture modeling method, and comprises thefollowing steps of: establishing a training image of multipoint geostatistics simulation consisting of discrete fracture pieces; representing the discrete fracture pieces by convex quadrilateral surface elements, representing the spatial configuration relationship of the fractures by data events formed by the fracture pieces, and calculating the similarity of the fracture piece data events in a manner of overall scaling of the fracture pieces and weighting of morphological parameters of the fracture pieces; and according to a sequential method, adopting a direct sampling mode to extract an appropriate crack mode from a training image to an actual model. According to the method, the structural property of crack space distribution can be guaranteed, the description of the crack scale is alsoreflected, and the configuration relationship of underground cracks of different scales in space can be objectively reproduced.

The invention relates to a color steel tile photovoltaic integrated structure which comprises corrugated color steel tiles and a photovoltaic film plate, the corrugated color steel tiles are rectangular, two sides of each of the corrugated color steel tiles in the long side direction are wavy curved surfaces, and the middle of the corrugated color steel tile is a plane. The structure has the advantages that a color steel tile and photovoltaic integrated structural form is adopted, the original structural performance of a roof is kept, the problem that water leakage often occurs in a built BIPVis solved, a system is simple in structure and convenient to install, and the photovoltaic construction period is shortened; through connection structures that corrugated curved surface structures ofthe corrugated color steel tiles are overlapped with one another, adjacent corrugated color steel tiles can be conveniently positioned and connected and are fixed to highest positions of wavy curvedsurfaces of the corrugated color steel tiles through self-drilling screws, and pressing force brought by elastic deformation of the wavy curved surfaces of the corrugated color steel tiles is utilized, so that better fixing and locking are achieved; the rectangular short edges of the adjacent corrugated color steel tiles are connected in a covering mode, and the corrugated color steel tiles on anupper portion cover the corrugated color steel tiles on a lower portion.

The invention provides a composite material connecting structure for a railway vehicle and a forming method. The structure comprises a first top plate skin, a second top plate skin, a main beam carbonplate and a carbon fiber cover plate, wherein the first top plate skin and the second top plate skin are glued on the top surface of the main beam carbon plate; the first top plate skin is spliced with the second top plate skin; at least one row of holes located in the two sides of the splicing position are formed in the top face of the main beam carbon plate; the first top plate skin is providedwith at least one row of first through holes in one-to-one correspondence with the at least one row of holes in one side; the second top plate skin is provided with two rows of second through holes in one-to-one correspondence with the at least one row of holes in the other side; the first top plate skin and the main beam carbon plate are riveted with the corresponding holes through the first through holes, and the second top plate skin and the main beam carbon plate are riveted with the corresponding holes through the second through holes; and the carbon fiber cover plate is arranged on theouter surface of the splicing position of the first top plate skin and the second top plate skin in an adhesive covering mode. The connecting structure can adapt to connection of rail vehicle composite materials, and the air tightness and the structural strength of connection can be guaranteed.

An embedding and sintering method for production of ceramsite from raw materials of red mud and tile waste belongs the technical field of ceramsite. The method is characterized by comprising the steps of: preparing raw materials containing 5-25% of red mud, 13% of tile green compact waste, 10-20% of polished tile waste, 25% of tile edging material, 10% of kaolin and 17-37% of quartz; milling for 2 h, drying the slurry, and producing the obtained powder through a pelletizer or manual way into raw ceramsite; mixing the raw ceramsite with an embedding filler in the mass ratio of 0: 1 to 0.4: 1, wherein the embedding filler is a mixed pellet containing quartz and magnesium oxide in the mass ratio of 1:0-5:1; sintering at 1170 DEG C for 15 minutes; cooling in the by furnace; and screening the embedding filler to obtain ceramsite using raw materials of red mud and tile waste. The method uses a large amount of red mud and tile waste material; the embedding filler after sintering and screening is reusable; and the obtained ceramsite using raw materials of red mud and tile waste has uniform granularity, high intensity and adjustable density.

The invention discloses a continuous ion exchange method for separating lithium from salt lake brine. The method comprises the following steps that a feeding flow rate is controlled, the salt lake brine is fed into a first adsorption zone of an ion exchange column and a second adsorption zone of the ion exchange column, and tail liquid containing lithium and other hetero-ions adsorbed by the first adsorption zone is collected to serve as a liquid ejection raw material; lithium-poor brine tail liquid adsorbed by the second adsorption zone is collected by means of an adsorption discharge pipe and returns to a salt pan; a feeding flow rate is controlled, the liquid ejection raw material is fed into a liquid ejection zone of the ion exchange column to conduct a liquid ejection process, and the ejected tail liquid is used for cyclic adsorption; and a feeding flow rate of a desorption medium is controlled, a desorption solution medium is fed into a desorption solution zone of the ion exchange column for desorption, desorbed tail liquid is collected, and an obtained desorption solution is taken as a product solution. According to the method, a separation process of lithium is realized by adopting simple steps, and the method has the characteristics of simplicity, easiness in operation and the like, and has a good application prospect.

The invention discloses a JSON format setting method of hydrological time series data. The method comprises the steps that time series attributes are classified according to the step length feature and interval feature of the time series attributes; expression of date and time abides by the standard GB/T 7408-2005/ISO 8601:2000; all nominal attributes are sorted according to the order of the numbers of no-repeat values contained by the nominal attributes from few to more; a JSON object serves as a main structure, and the main structure comprises a key value pair of which the key names are nominal, timeseries and data respectively; different data subsets are screened out from original data according to values of the nominal attributes; converted JSON-format original hydrological time series data comprises information of the data values and time information of the data. The JSON format setting method has the following advantages that the total length of a data series is as small as possible through the efficient organization structure, and the network transmission efficiency is improved.

The invention provides a fabricated precast concrete pavement slab assembly, a pavement structure and a construction method of the pavement structure. The pavement slab assembly comprises a precast concrete pavement slab A and a precast concrete pavement slab B, grooves and pre-buried bolts are arranged on the side faces of the adjacent pavement slabs, connection is achieved through the fastening nuts, construction is fast, tight attachment between the pavement slabs and the base layer is achieved by grouting the bottoms of the pavement slabs, the connection requirement of the joints is met by grouting the joints between the pavement slabs, therefore, the structural performance of the precast concrete pavement structure in all directions is ensured. Thus, the technical problems that in the prior art, the inter-plate connecting process of the fabricated precast concrete pavement plate is complex and poor in effect, and the fabricated precast concrete pavement plate and the base layer cannot be tightly attached are solved, large-area and multi-section simultaneous construction can be achieved, meanwhile, the requirement for the flatness of the base layer is further lowered, and the construction quality and the construction efficiency are greatly improved.

The invention relates to a laser welding method for a repairing penetrating defect of base metal. The method comprises the following steps that S1, the to-be-repaired defect of the base material is pretreated and machined into a groove weld joint with a wide upper portion and a thin lower portion; S2, the width of a weld joint lower groove is determined, if the width of the lower groove is greaterthan the diameter of a welding wire, at least one layer of convex weld welding are conducted on the two sides of the lower groove side by side in the length direction of the weld joint until the width of the lower groove is the same as the diameter of the welding wire, then priming layer welding is conducted on the weld joint between convex welds on the two sides, and if the width is smaller thanor equal to the diameter of the welding wire, the priming layer is directly welded; S3, multiple welding layers are superimposed and welded on the priming layer, a welding layer zone is formed, and the top of a welding layer block is lower than a weld joint upper groove; S4, a repair layer is superimposed and welded on the welding layer block, and the top of the repair layer is higher than the weld joint upper groove; and S5, the repair layer higher than the upper groove is ground, and thus the repair layer is flush with the upper groove.