75results about How to "Spatial stability" patented technology

The invention belongs to the fields of fruit tree cultivation and fruit tree ecology, and discloses a shaping method for a downward-arrowhead-shaped tree shape of a pear tree. The tree shape has a tree height of 2.4-2.5 m, and a trunk height of 0.6-0.7 m, and only two main branches and one centre trunk of a first layer are reserved, therefore, the tree shape is called as the downward-arrowhead-shaped tree shape. The downward-arrowhead-shaped tree shape is small in top and large in bottom, the influence of upper branches on lower branches is less, and ventilation and light transmission conditions are good. The downward-arrowhead-shaped tree shape of a pear tree is an innovation based on the '3-plus-1' tree shape disclosed previously, which is simple in structure, convenient in culture, easy to grasp by fruit growers, convenient in field management, and easy to spread and popularize; and the tree shape is a novel high-quality and labour-saving cultivation tree shape of a pear tree.

The invention relates to a preparation method of conductive polymer-coated silicon composite carbon nanotube negative electrode material, In-situ polymerization of polyaniline on submicron or nano-sized silicon surface without organic solvent and simultaneous doping of conductive polymer polyaniline can effectively inhibit the volume expansion of silicon and provide good conductivity for silicon,and then polymerization of polyaniline with [pi]- [pi] conjugate effect, adding pre-dispersed carbon nanotubes, so that polyaniline coated silicon particles are uniformly dispersed and firmly fixed inthe carbon nanotube dispersion system. Carbon nanotubes with high conductivity and elasticity provide stable expansion elastic space and conductivity for polyaniline-coated silicon particles, which can completely solve the volume expansion of silicon and the destruction of negative electrode caused by pulverization. Polyaniline-coated silicon nanocomposite carbon nanotubes were synthesized. Underthe synergistic effect of silicon, polyaniline and carbon nanotubes, the content of elemental silicon can reach 50% and the specific capacity can reach more than 1800 mAh/g.

The invention discloses a preparation method of an alumina thin film in the field of a thin film transistor. The preparation method comprises the following steps of: preparing aluminium precursor solution, i.e., dissolving a precursor material containing aluminium metal ions and a stabilizer in solution and sufficiently stirring to sufficiently dissolve the precursor material and the stabilizer to obtain the precursor solution; and preparing the alumina thin film, i.e., coating the prepared reaction solution on a coating surface to form a film and carrying out heat treatment program to obtain the alumina thin film. The invention also relates to the alumina thin film prepared by the preparation method and application of the alumina thin film in the transistor. The application comprises the thin film transistor of the alumina thin film and a preparation method of the thin film transistor. According to the preparation method of the alumina thin film, which is disclosed by the invention, by adding a right amount of stabilizer for stabilizing an alumina precursor material, a metal organic complex is formed by the precursor material of aluminium through the coordination dissolution reaction; the complex can be well dissolved in the solution and has low thermal decomposition temperature; and the heat treatment temperature in the preparing process is reduced.

The invention discloses a block polymeric dispersant and a preparation method and application thereof. The structural formula of the block polymeric dispersant is as defined in the specification. The preparation method comprises the following steps: using trithio ester with symmetrical structure as a RAFT reagent, using azo or peroxide as an initiator, through the copolymerization of unsaturation hydropathy monomer, preparing a polymeric surfactant of ABA-type structure with controllable structure and narrow molecular weight distribution. The application is as follows: the block polymeric dispersant is applied to a pesticide dry flowable. In the preparing process of the dry flowable, the polymeric dispersant has the dispersing and stabilizing functions. Under the relative action of ion pair, Lewis acid-base and hydrophobic group, a wetting agent is continuously replaced by the polymeric dispersant in the grinding process and the polymeric dispersant is firmly adsorbed to the particle surface, and amphipathy particles covered by the surfactant are stably suspended and dispersed in the water for a long time under the action of steric hindrance, solvatable chain and electrostatic repulsion, so the suspension percentage and physical stability of the dry flowable can be effectively improved.

The invention discloses a reaction cavity which comprises a cavity inner liner, a cooling cavity and a purging structure, wherein the purging structure comprises a first air inlet pipe passing through the cooling cavity from the outside of the cooling cavity; the first air inlet pipe is provided with an air outlet at the end arranged towards the cavity inner liner; the direction of the connecting line from the air outlet of the first air inlet pipe to the shortest distance between the cavity inner liner and the surface of the cooling cavity is taken as the first direction; the direction in which the purge gas is guided out from the air outlet is taken as the second direction; an included angle is formed between the second direction and the first direction, so that the diffusion path of the purge gas can be prolonged, the contact area of the inner liner is enlarged, and the cooling effect is reduced; and therefore, the phenomenon of low local temperature of the cavity inner liner can be reduced, and the even airflow field can be formed. Furthermore, the space between the cavity inner liner and the inner wall of the cooling cavity is protected and maintained to be stable, so that the reaction cavity is beneficial to maintaining the reaction to be carried out normally.

The invention discloses a three-dimensional variable-space variable-structure flue gas reheater. The three-dimensional variable-space variable-structure flue gas reheater comprises a flue gas channel composed of an inlet flue, a sealing plate and an outlet flue. The flue gas channel is provided with low-temperature heat exchange tubes and high-temperature heat exchange tubes in sequence in the flowing direction of flue gas, and the low-temperature heat exchange tubes are three-dimensional deformation HP tubes which are formed by spirally twisting elliptical tubes. The three-dimensional deformation HP tubes are adopted, the tube pass section is changed from round to flat, an abrasion point at a 60-degree angle is destroyed, the tube pass sectional area can be reduced by 40%-60% compared with that of a round plain tube, a stable flowing space of the shell pass outside the tubes is obtained, and the fluid resistance is reduced; the interior of each HP tube is of a special spiral structure, so that secondary flow of fluid is generated perpendicular to a main flow direction, the thermal boundary layer is destroyed, and the heat exchange efficiency is improved by 20%-40%; and the HP tubes are arranged in a special staggered arrangement mode, self-supporting is formed among tube bundles, the structure is quite compact, and the size of the flue gas reheater is 40%-50% smaller than that of a conventional reheater.

The invention relates to an ecological restoration system for small and medium-sized river channels in rural areas, which comprises a floating bed system which structurally comprises a floating body frame, a field planting area connected to the upper portion of the floating body frame and a suspension filler area connected to the lower portion of the floating body frame. The field planting area comprises a plurality of uniformly distributed grid areas, the longitudinal section of each grid area is of a big-end-up conical structure, the grid areas are used for placing field planting baskets matched with the grid areas in shape, and the field planting baskets are used for planting emergent aquatic plants; the floating body frame is of a structure with the hollow surface and the hollow interior, and the field planting basket is communicated with the floating body frame in the vertical direction. The suspension filler area comprises a plurality of suspension ropes tied below the floating body frame, and the suspension ropes are provided with three-dimensional elastic fillers and biofilm culturing biological ropes. The technical problem that the purification effect of a floating bed system is insufficient is solved, the air permeability is enhanced, the air reoxygenation process is facilitated, a larger and more stable space is provided for plant growth, a larger space is provided for microorganism growth, the absorption effect on nitrogen, phosphorus and organic matter is improved, and the deep purification effect is improved.

The invention relates to an acrylate coating layer emulsion capable of preventing down feather from escaping from needle holes, coating layer glue and a preparation method of the acrylate coating layer emulsion. The acrylate coating layer emulsion contains the following raw materials in parts by weight: 9.5-10 parts of iso-tridecanol polyoxyethylene ether (40), 1-1.5 parts of sodium dioctyl sulfosuccinate, 2-2.5 parts of alcohol ether sulfosuccinate monoester disodium salt, 1-1.5 parts of itaconic acid, 2.5-3 parts of acrylamide, 3-3.5 parts of acrylic acid, 160-165 parts of n-butyl acrylate,40-43 parts of iso-octyl methacrylate, 24-27 parts of acrylonitrile, 3-3.5 parts of hydroxyethyl methylacrylate, 3-3.5 parts of an acrylic acid modified reaction type slip agent, 0.7-1.2 parts of 3-(2,3-epoxypropoxy)propylmethyldiethoxysilane, 4-4.5 parts of hydroxyethyl acrylamide, 0.8-1.2 parts of ammonium persulfate, 0.2-0.4 parts of sodium hydrogen sulfite and 280-300 parts of deionized water.A polymer emulsion formed through the polymerization of a seed emulsion is particularly suitable fortaffeta, cotton and nylon fabrics.

The present invention relates to a method for screening of the lipase having improved enzymatic activity using yeast surface display vector and the mutant lipase prepared by the same, more particularly to the method comprising; 1) cloning lipase gene into surface display vector, 2) preparing mutant lipase gene library of the step 1 by mutagenic PCR, 3) transforming the mutant lipase gene library of the step 2 and surface display vector into host cell, and 4) measuring the activity of the mutant lipase displayed in the surface of the transformed host cell and selecting the mutant lipase prepared by the same. The method of the present invention can screen the lipase having improved enzymatic activity. So, it can effectively be used for the various fields, such as food and detergent industry.

The invention provides a gaseous fuel mixing device. The gaseous fuel mixing device comprises a fuel injection pipe, a primary air pipe and a mixing chamber. The fuel injection pipe and the primary air pipe are arranged at the front end of the mixing chamber. The mixing chamber expands and contracts gradually with the two ends being narrow and the middle portion being wide. Umbrella-shaped diffusion cones which are arrayed in a stepped mode are arranged in the mixing chamber, and the number of the next-stage umbrella-shaped diffusion cones is larger than the number of the prior-stage umbrella-shaped diffusion cones. Secondary air pipes are further arranged behind the mixing chamber, secondary air sprayed in from the secondary air pipes enters the mixing chamber in the tangential direction, and the rotational flow direction of the secondary air is opposite to rotational flow direction of the primary air. The gaseous fuel mixing device has the advantages that the disturbance capacity is high, and fuel and air are evenly mixed.

A surface treatment device includes a vacuum blast head, an air curtain-forming unit and an auxiliary air injection unit. The vacuum blast head includes an injection nozzle and a suction hole. The injection nozzle injects a polishing agent used for blast treatment on a surface of a material to be treated. The suction hole sucks up the injected polishing agent with suction air. The air curtain-forming unit injects air toward the surface of the material to be treated to form an air curtain that surrounds the injected polishing agent. The auxiliary air injection unit injects auxiliary air between the air curtain and the suction air toward the material to be treated at a lower pressure than the air that forms the air curtain.

The invention discloses a supporting device of a percutaneous expanding crest, comprising a supporting piece provided with a via hole, an expansion piece and a back blocking piece, wherein the expansion piece comprises a shaft and a first end of the shaft to be pivoted to one or a plurality of vanes, and the back blocking piece is matched with a second end of the shaft of the expansion piece. The shaft of the expansion piece is sleeved in the via hole of the supporting piece in a penetrating way, the second end of the shaft of the expansion piece is provided with a long slide hole in an axial direction, and is pivoted to one or a plurality of vanes in a sliding way through the long slide hole. The supporting piece can be movably contacted with the vanes which are pivoted to the both ends of the expansion piece to form a tip type ellipse, the expansion piece and the supporting piece forming form the tip type ellipse are inserted into a vertebrae spinous process interval position together, and the vanes at the both ends strentch by being pushed or pushing against a pivot to be respectively arranged at both sides of the vertebrae spinous process interval position in a locking way. The device can lower the infection risk, can efficiently form support to vertebrae, can stabilize a vertebrae neural foramen space after an operation, and has the advantages of simpleness and efficiency as a device for treating pains caused by compressing vertebrae nerves.

The invention relates to a tunnel structure penetrating through an active fault fracture zone. The tunnel structure is located in a rock stratum and stretches across the active fault fracture zone, and comprises a tunnel body stretching across the active fault fracture zone and a flexible buffer layer between the tunnel body and the active fault fracture zone, the tunnel body is formed by coaxially and sequentially splicing a plurality of pipe sections end to end, a supporting layer used for stabilizing a broken zone is further arranged between the buffer layer and the active fault fracture zone, the supporting layer stretches across the active fault fracture zone, the supporting layer is arranged around the pipe sections, and a supporting abutment used for supporting the pipe sections isfurther arranged on the supporting layer. The tunnel structure has the effect of reducing the dislocation displacement of the active fault fracture zone and directly transmitting the force to the tunnel body.

The invention discloses an ecological floating bed for ecological environment protection and a construction method. The ecological floating bed comprises a plurality of modules which can be adjacentlycombined, and anchor rods mounted at river banks. Each module comprises a bottom plate, a square-opening groove is vertically formed in the middle of the bottom plate in a penetrating mode, a movablydetachable box body is installed above the bottom plate, and a planting groove is formed after the middle of the box body is concaved downwards. The product can be assembled on the bank without launching operation, so that the operation is safer and more convenient.

The invention relates to a practical cross-linking apparatus. The practical cross-linking apparatus comprises a cross-linking box, a steam generator and a controller, wherein the bottom of the cross-linking box is provided with a steam pipeline and connected with the steam generator; the central part of the cross-linking box is provided with a thermocouple; a temperature measurement signal is transmitted to the controller to control the opening and closing of the steam generator; and bottom of the steam generator is provided with a water inlet pipeline. The practical cross-linking apparatus is simple in structure, reduced in cost, convenient, practical, free of geographic restrictions and stable in operation.