87results about How to "Uniform stability" patented technology

The invention relates to a powder metallurgy brake lining for the CRH5 (China railway high-speed) motor train unit. The powder metallurgy brake lining is characterized by comprising 5 brake lining friction bodies, 1 dovetail block, 1 steel back plate, 5 rivets, 5 large gaskets, 5 small gaskets, 5 butterfly-shaped shrapnels, 15 cotter pins and 6 flush head rivets; the 5 friction brake lining bodies are fastened at the front part of the steel back plate; each brake lining friction body is formed by an equilaterally triangular friction body skeleton with three arc chamfers and a friction body; the section of the dovetail block is in a W-shaped long plate structure; the steel back plate is in an irregular hexagonal plate structure; the back of the steel back plate is connected with the dovetail block; the front part of the steel back plate is riveted with the 5 brake lining friction bodies by the large gaskets, the small gaskets and the butterfly-shaped shrapnels at intervals; all pin joint holes in the steel back plate are respectively connected with one ends of the cotter pins; the other ends of the cotter pins are correspondingly suspended in guide holes in all friction body skeletons. Process holes are formed in the upper, lower and arc edges of the steel back plate.

The invention provides a method for improving temperature gradient in a high-temperature tension sample of a heat expansion phase change instrument. The method is characterized in that one of following methods is improved in the tension test process: a clamp is prepared from austenitic stainless steel to replace the existing clamp to test; or, a U-shaped heat isolation sleeve and a fixed screw heat isolation ring are arranged at the contact part of the sample clamping end and the clamp to completely isolate the clamp, the fixed screw and the tension sample through the U-shaped heat insulation sleeve and the fixed screw heat isolation ring, and the clamp is prepared from austenitic stainless steel to replace the existing clamp to test. The method has the advantages that the austenitic stainless steel is used as the clamp preparation material and the ceramic fiber sheet is used as the heat isolation sleeve and the heat isolation sleeve, so that the heat radiation and heat conduction of high-temperature objects and low-temperature objects are effectively inhibited; the operation is easy, the detachment and installation of the sample are convenient, and the material stability is guaranteed.

A storage element for a solid electrolyte battery is provided. The storage element has a main member having a porous matrix of sintered ceramic particles in which particles that are made of a metal and/or a metal oxide and jointly form a redox couple are embedded. Along a preferred direction, the storage element has a certain concentration gradient of the particles made of the metal and/or the metal oxide and/or a certain gradient of a pore density and/or a pore size, thereby allowing the diffusion behavior of oxygen ions within the main member to be controlled and thus the charge and discharge kinetics, the life and the capacity of the battery to be improved.

A multifunctional clothing hanger includes an integrally molded frame formed by a cross bar, connecting end pieces having a pair of ends of which a respective first end is attached at each end of the cross bar, a pair of outwardly extending arms having a pair of ends where respective first ends are connected to a respective connecting end piece and the respective second ends are attached to each other and to a hook that is used for hanging the hanger from a pole within a closet. In one embodiment, the cross bar of the hanger frame is formed with a series of U-shaped loops, while the respective outwardly extending arms are formed with a plurality of downward facing T-shaped hooks. In another embodiment of the invention, the hanger is provided with a second cross bar that is disposed a spaced distance below the first cross bar and is provided with several, spaced divider posts that are attached between and to the first and second cross bars so as to form several compartments. The various loops, hooks and compartments that are formed on the hanger allow it to have a multiplicity of uses besides just hanging a single article of clothing, such as hanging jewelry, scarves, belts, earrings, and several similarly constructed articles of clothing in a simultaneous fashion. The multifunctional hanger allows a greater utilization of often lacking storage space within a closet of a residential home.

The invention relates to an automatic control system and method for a high-precision straightening machine and belongs to the field of automatic control. Through the automatic control system and method, the straightness (curvature) reaches over 0.3 mm/m according to the straightening precision of the high-precision straightening machine; a hardware structure and a software method of the automatic control system for the high-precision straightening machine are designed considering closed-loop control of oil source pressure and oil cylinder piston displacement of a hydraulic system of the high-precision straightening machine, continuous detection of straightening operation process data, stepless speed regulation control for calibrating transmission of all sets of straightening rollers and the like, the international advanced level of three-dimensional rotation straightening under high-precision automatic control is reached, consistency of roller gap precision in the straightening process, stability of evenly distributed and balanced straightening force and reliability of nonlinear variable gain automatic compensation can be guaranteed, the straightness is improved to 0.2 mm/m from 0.3 mm/m according to the straightening precision of the high-precision straightening machine, and the straightening target that straightened materials have no blind area or tiny crack or scratch or oval or bounce is achieved.

There is provided a control apparatus for a gas sensor, which has a sensor element equipped with first and second oxygen pumping cells. The sensor control apparatus is configured to drive the first oxygen pumping cell to adjust the oxygen concentration of gas under measurement, drive the second oxygen pumping cell to produce a flow of electric current according to the amount of oxygen pumped out of the oxygen concentration adjusted gas by the second oxygen pumping cell, perform specific drive control to control the amount of oxygen pumped by the second oxygen pumping cell to a predetermined level after startup of the sensor element and before the application of the drive voltage between the electrodes of the second oxygen pumping cell.

The invention provides a composite stabilizer for contaminated soil. The composite stabilizer comprises the following components in parts by weight: 20 to 30 parts of iron powder, 2 to 7 parts of aluminum powder, 45 to 55 parts of calcium oxide and 15 to 25 parts of sepiolite. The technical scheme has the effects that the composite stabilizer consists of the iron powder, the aluminum powder, the calcium oxide and the sepiolite, and the iron powder and the aluminum powder can be used for reducing arsenic and cadmium in an environment and reducing toxicity, and can also form a complex and a compound with the arsenic and the cadmium to reduce the migration capability; the sepiolite has a large specific surface area, can be used for adsorbing a large number of substances, is an excellent loading carrier, and has a catalytic effect; the calcium oxide can be used for regulating a reaction condition to be alkaline, and heavy metals can be precipitated more easily under the alkaline condition; a unique proportion is adopted, so that optimal stabilization effects of the composite stabilizer on the arsenic and the cadmium in the contaminated soil can be achieved under the condition of lowest cost. The invention also provides a treatment method for the contaminated soil. The method comprises simple steps, and is high in practicability, and parameters are easy to control.

The invention provides PU sponge with good air permeability. A raw material of the PU sponge comprises the following components in part by weight: 80-100 parts of polyurethane, 35-50 parts of fillingagent, 20-25 parts of foaming aid, 10-15 parts of adhesion promoter, 8-12 parts of water, 1-3 parts of antioxidant and 0.5-1 part of catalyst, wherein the foaming aid is a mixture of a foaming agent,benzotriazole, sodium borohydride and P-octyl phenol with a mass ratio of (1-5):(1-3):(3-5):(0.5-2); the adhesion promoter is a mixture of nitrile rubber, polyether polyol and epoxy resin with a massratio of (8-12):(3-7):(1-3). The PU sponge prepared by the raw material and a process provided by the invention has a density of 0.029/mm<3>, a 25 percent of compression hardness is above 1.9 KPa, a porosity of a above 88 percent and a rebound rate of above 47 percent, thereby being high-quality sponge.

The invention provides a spherical nickel cobalt aluminum precursor, and belongs to the field of a positive electrode material of a lithium ion battery. The spherical nickel cobalt aluminum precursoris formed by radially grown prisms and has a radial pattern spherical appearance; the spherical nickel cobalt aluminum precursor has the chemical components of [a(Ni<x>Co<y>C<2>O<4>)].bAl(OH)<3>, wherein x is greater than or equal to 0 and less than or equal to 1, y is greater than or equal to 0 and less than or equal to 1; a x is greater than 0 and less than or equal to 1; b x is greater than orequal to 0 and less than 1; a+b is equal to 1; the spherical nickel cobalt aluminum precursor is 8-50 [mu]m in grain diameter; and the prism main phase is nickel cobalt oxalate and the surface is loaded with aluminium hydroxide granules. The scanning electron microscope analysis proves that the spherical nickel cobalt aluminum precursor provided by the invention has the radial pattern spherical appearance and is formed by the radially grown prism, with uniform dimension and appearance distribution and regular and tidy spherical structure; and the specific capacity of a nickel cobalt aluminum positive electrode material prepared from the spherical nickel cobalt aluminum precursor provided by the invention can reach 160 mAh.g<-1> and has relatively high cycle performance.

The invention belongs to the field of nano material preparation, and particularly discloses a method for preparing nano silicon through three-stage grinding. The method comprises the following steps:1) adding high-purity silicon powder, a solvent and a dispersing agent into a dispersing tank of a first-stage sand mill, and carrying out pre-dispersion; introducing the dispersed mixed solution intoa first-stage sand mill for first-stage grinding to obtain silicon slurry with the nano-silicon particle size D50 of less than 1000nm; (2) introducing the slurry subjected to primary grinding into asecond-stage sand mill for secondary grinding to obtain silicon slurry with the nano-silicon particle size D50 of less than 100nm; (3) introducing the slurry subjected to secondary grinding into a third-stage sand mill for third-stage grinding to obtain silicon slurry with the nano-silicon particle size D50 of less than 50nm, and carrying out drying to obtain nano-silicon powder. Compared with theprior art, the method disclosed by the invention is simple in preparation process and low in cost, greatly improves the wet grinding efficiency, reduces the particle size of the nano silicon, ensuresthe uniform dispersity and stability of the silicon slurry, and is suitable for industrialization.

The invention relates to a magnesium-aluminum hydrotalcite loaded-type superfine nano-palladium catalyst and a preparation method thereof, and belongs to the technical field of palladium catalysts. Inorder to solve the problem that environmental pollution is generated due to the fact that a stabilizer is used in the nano-palladium catalyst preparation process, the invention provides the preparation method of the magnesium-aluminum hydrotalcite loaded-type superfine nano-palladium catalyst. The method comprises the steps that magnesium-aluminum hydrotalcite is mixed with water, nitrogen is introduced, mixed liquid is subjected to ultrasonic treatment at first ultrasonic power, the magnesium-aluminum hydrotalcite is uniformly dispersed in the mixed liquid; a palladium brine solution is added according to the certain weight ratio of Pd<2+> to magnesium-aluminum hydrotalcite, and precipitate obtained through centrifugation is the magnesium-aluminum hydrotalcite loaded-type superfine nano-palladium catalyst. Accordingly, the stabilizer and a reducing agent are not used, the particle size of superfine nano-palladium particles is only 1.85-3.45 nm, the catalyst is applied to a Suzuki coupling reaction, and good catalytic performance and reusability are shown.

The invention belongs to the technical field of oral scanning, and discloses a direct three-dimensional scanning method and system for a physiological motion boundary of oral soft tissue. The direct three-dimensional scanning system for the physiological motion boundary of the oral soft tissue comprises an oral image acquisition module, an oral image processing module, an oral image segmentation module, a central control module, a non-motion area acquisition module, a direct three-dimensional scanning module, a three-dimensional scanning data acquisition module, a data storage module, a terminal module and a display module. The scanning system provided by the invention is high in scanning speed, high in precision and simple to operate; an active contour method is used for semi-automatically carrying out labeling segmentation on an oral medical image serving as a training set, and the semi-automatic method improves the accuracy and timeliness of labeling segmentation; and a confrontation generation network is used for automatically generating a segmentation result of the oral medical image, so that the complete and effective expression of the healthy oral physiological structure isbalanced in key indexes such as segmentation precision, efficiency, stability and robustness.

The invention discloses a preparation method of an antibacterial agent for a suture line of surgical operation. The preparation method comprises the following steps: (1) preparing a chloro silver lactate compound; (2) preparing chitosan modified by 5-(4-chlorobutyl) hydantoin; and (3) doping silver ions. The invention further discloses the antibacterial agent for the suture line of surgical operation which is prepared by adopting the preparation method and the suture line of the surgical operation which adopts the antibacterial agent for the suture line of surgical operation as the antibacterial treatment agent. The antibacterial agent for the suture line of surgical operation disclosed by the invention is low in preparation price, obvious in antibacterial effect, good in compatibility with the suture line of the surgical operation, good in stability of the antibacterial property, and safe and environmentally friendly in use.

The invention discloses a metallic paint coating and a preparation method thereof. The preparation method comprises the following steps that a base material is coated with a primer layer; the primer layer is coated with a metallic paint layer, wherein the components of the metallic paint are waterborne polyurethane and metallic copper powder; the metallic paint layer is dried; the metallic paint layer is subjected to polishing treatment; the polished metallic paint layer is subjected to blackening treatment; oxidation treatment is performed on the metallic paint layer subjected to blackening treatment; and the oxidized metallic paint layer is coated with a transparent protective paint layer. According to the preparation method of the metallic paint coating, the coating is uniform and stable through reasonable proportion blending; then, through multi-layer polishing treatment, the core metallic paint layer presents perfect metallic texture; through chemical treatment, the metallic texture shows various changes to meet different requirements; and finally, the protective layer is used for protection, so that the service life is prolonged while the appearance purpose is achieved.

The present invention provides a polymer cement-based composite protection material for nuclear power projects, wherein the polymer cement-based composite protection material comprises a liquid component and a powder component according to a mass ratio of 1:0.8-1.5. The present invention further provides a preparation method of the protection material. The protection material has characteristics of rich raw material source, low cost, and simple preparation process, further has functions of protection and water resistance, and is particularly suitable for protection of military facilities and nuclear power facilities.

The invention discloses a responsive cross-linked polymer micelle based on multi-hydrogen bond interaction as well as a preparation method and an application thereof. The structural formula of the micelle is as follows: x is an integer of 20-50, y1 is an integer of 80-110, and y2 is an integer of 3-15.According to the invention, the amphiphilic block copolymer is prepared by using dimethylaminoethyl methacrylate as a hydrophilic chain and a ureidopyrimidinone group with multiple hydrogen bond interactions as a hydrophobic chain through a simple one-pot method; the polymer is self-assembled inwater to form a uniform and stable core cross-linked micelle, and then the core cross-linked micelle and N,N'-bis(bromoacetyl)cystamine are subjected to a cross-linking reaction to prepare the polymer. The responsive cross-linked polymer micelle based on multiple hydrogen bond interaction is used as a drug delivery carrier to encapsulate nile red; the result shows that the responsive cross-linkedpolymer micelle has good stability and reasonable controlled release ability, has great potential in drug delivery, and has huge application prospect.

The invention relates to the technical field of geotechnical engineering, and particularly discloses a high-stability roadbed filler and a preparation method thereof. The roadbed filler comprises the following raw materials by weight: 20 to 30 parts of gravelly soil, 10 to 20 parts of limestone, 40 to 55 parts of fly ash, 10 to 20 parts of yellow stone powder, 4 to 6 parts of an anti-freezing agent, 2 to 4 parts of a reinforcing agent, 0.8 to 1.5 parts of calcium carbonate, 1 to 2 parts of potassium carbonate, and 1 to 2 parts of phosphogypsum, wherein the anti-freezing agent comprises at least one selected from fish collagen powder and glucose. The preparation method of the roadbed filler comprises the following steps: uniformly mixing the gravelly soil, the limestone and the fly ash, adding the yellow stone powder and the phosphogypsum, and conducting uniform mixing to obtain a first mixture; uniformly mixing the first mixture with calcium carbonate and potassium carbonate, then jointly mixing the obtained mixture with the anti-freezing agent and the reinforcing agent; and conducting uniform mixing to obtain the roadbed filler. The roadbed filler disclosed by the invention has the advantage of good anti-freezing property.

The invention discloses an atomization powder making spraying disc which is characterized in that the atomization powder making spraying disc comprises a bracket and a plurality of atomizing components for jetting and atomizing fluid; the bracket is connected with the atomizing components through adjustable connection mechanisms; and the atomizing components are distributed on the bracket along the periphery in a central symmetry manner. The atomization powder making spraying disc is simple and compact in structure, the mounting precision can be improved, the adjustment can be made flexibly and conveniently, and the precision of nozzle angles is guaranteed, so that the atomizing stability is improved, the atomization power making quality is guaranteed, atomized media can effectively impact high-temperature melts to allow the high-temperature melts to be broken into tiny liquid drops, and atomized powder can have the uniform particle size.

The invention discloses a controllable abrasion load test device, which comprises a work table, a motor, an abrasive disk, a test specimen and a controllable abrasion load experiment device, wherein the abrasive disk is connected onto the motor; the motor is fixed on the work table; one end of the test specimen is put into the controllable abrasion load experiment device, and the other end of the test specimen is in contact with the abrasive disk; the controllable abrasion load experiment device is fixed on the work table; the controllable load loading range is 0 to 500N; the abrasion scale abrasion range is 0 to 20mm; the precision can reach 0.01mm. The controllable abrasion load test device has the advantages that the structure is simple; the repair is convenient; the goal of meeting the test requirements under different loads through regulating and changing a loading load spring can be easily realized.

The invention discloses a connection service discovery and load rebalancing. In a networked data system, a discovery protocol enables clients to establish connections to one a plurality of database servers to utilize a distributed connection service. The service manages connections between application servers, i.e. clients, and databases. An initial request from the client is received by a load balancer. The load balancer responds to the client by identifying an assigned connection to one of the database servers based on load considerations. The client sends a secondary request directly to theassigned connection, bypassing the load balancer. The service establishes a persistent link on the assigned connection and assigns a time-to-live (TTL), during which the service connects data requests to the databases. Upon expiration of the TTL, the service completes a next data request received, then notifies the client that the connection is no longer valid, thereby requiring a new connectionthrough the load balancer and rebalancing system traffic.