475results about How to "Adjustable" patented technology

This invention relates to a gas diffusion layer used in proton exchange film fuel cells and its preparation method, in which, the gas diffusion layer includes a multihole supporting layer and a microhole layer, the multihole supporting layer is a net and porous structure, the microhole layer is composited on the surface of the porous supporting layer closing to the catalyzed layer and covers the surface of the large hole and fiber dense region of the supporting layer uniformly but not penerates into the inside of the supporting layer, which applies a drying method to prepare a gas diffusion layer used in proton exchange membrane fuel cells, and polymr 1 and 2 containing FI is either a same kind or different, and the hydrophile/hydrophobic degree of the two layers is adjustable, so the gas diffusion layer structure is matched with the running condition of the fuel cell and discharges water more easily.

The invention relates to a medium resonator antenna with a reconfigurable directional diagram, and a phased array thereof, which belong to the technical field of antennas. The radiator of the medium resonator antenna with the reconfigurable directional diagram comprises two monopole antennas capable of working independently, one metal baffle and a high-dielectric constant medium hemisphere covered on the baffle; and a feeding structure adopts a coaxial feed microstrip circuit and a PIN switching diode to realize the simultaneous input of a DC PIN switch control signal and a radio frequency signal and the switching of the working states of the monopole antennas. The phased array of the antenna is a linear phased array consisting of a plurality of the medium resonator antennas with the reconfigurable directional diagrams as antenna units. The medium resonator antenna with the reconfigurable directional diagram has the characteristics of adjustable radiation directional diagram and working frequency; and the phased array of the antenna has the characteristics of the adjustable radiation directional diagram and working frequency, can realize beam scanning in a lager angle and reduce the sidelobe level of a scanning directional diagram, and the gain of the scanning directional diagram is basically unchanged with the increasing of a scanning angle.

The invention discloses a method for preparing three-dimensionally sequentially porous chitosan bone repair scaffold material. The method comprises the steps of dissolving chitosan powder in dilute acetic acid and standing to defoam; coating the prepared chitosan solution on the surface of a mold evenly, placing in a solidification solution at room temperature to solid and form a membrane, demoulding and obtaining a chitosan membrane moulding plate; pouring the prepared chitosan solution into the chitosan membrane moulding plate, sealing and soaking in the solidification solution to solid and demould to obtain chitosan gel; and washing the chitosan gel to be neutral by distilled water and drying. The method is simple in preparation technology; the three-dimensionally sequentially porous chitosan bone repair scaffold material prepared is good in regularity and high in strength and porosity, and can meet the requirements of tissue engineering scaffold material.

The present invention discloses an electrostatic protection method with detection control circuit and circuit which belongs to electrostatic protection field, and the method comprises the following steps: detect input voltage on input/output terminal of a chip internal circuit through a detection circuit, when input voltage smaller than trigger voltage set by the detection circuit, it is judged to be working voltage, and working current corresponding to the working voltage flows into the chip internal circuit through input/out terminal of the chip internal circuit directly, and the trigger voltage is smaller than minimum breakdown voltage of the chip internal circuit; when input voltage on input/output terminal of a chip internal circuit is detected bigger than or equal to the trigger voltage, it is judged to be electrostatic discharge voltage, and the detection circuit controls electrostatic discharge current corresponding to the electrostatic discharge voltage bleed through a bleeder circuit, thereby the input voltage is clamped in safe voltage range and plays the role of internal circuit protection. The present invention realizes clamp or normal work through detecting input voltage and control bleed.

The invention discloses a probiotics fermentation Chinese medicinal herb composite feed additive used for preventing and treating diarrhea of delivery room suckling piglets and weaning conservation piglets. According to laboratory repeated fermentation experiments and actual using effect of products at a plurality of scaled pig farms, a screened and determined formula is as follows: bacillus cereus inoculum size 2-4%, bacillus subtilis inoculum size 2-4%, Chinese medicinal herb inventory 8-20% (main ingredients of which are the root of Chinese pulsatilla, myrobalan, liquorice and schisandra chinensis), and performing liquid state fermentation and then drying. The probiotics fermentation Chinese medicinal herb composite feed additive used for preventing and treating diarrhea of delivery room suckling piglets and weaning conservation piglets can effectively resolve the problem of piglet diarrhea during scaled pig farming process, effectively improve organism immunity and disease resistance capability of piglets, adjust animal enteric micro-ecology balance and repair intestine mucosa damage, and has the effects of improving weaning piglet daily gain by 6%-12% and feed use ratio by 10%-15% and lowering diarrhea rate by 25%-35%. The probiotics fermentation Chinese medicinal herb composite feed additive used for preventing and treating diarrhea of delivery room suckling piglets and weaning conservation piglets is an ideal green environment-friendly safe and novel feed addictive for replacing antibiotic medicines in diarrhea controlling.

The invention belongs to the technical field of materials and chemistry and provides light diffusion materials. The light diffusion materials comprise light diffusion particles and light-passing materials. The light diffusion particles are multihole light diffusion particles or hollow light diffusion particles or a mixture of the hollow light diffusion particles and the substance light diffusion particles. The light diffusion particles account for 0.1%-25% by weight of the light diffusion materials. The light diffusion materials have high light transmittance and high harizonae. The invention also provides a preparation method of the light diffusion materials.

A base-adjustable fixture for an elongated workpiece with the outer contour needing to be milled comprises a base, movable portal devices, a positioning device and a control system. A transverse guide rail is mounted at each of the upper and lower edges of the base, and limiting devices for limiting a workblank are arranged on the upper surface of the base at intervals according to the shape of the outer contour of the workblank needing to be machined. Movement of a portal frame structure of each movable portal device along the transverse guide rails is controlled by a portal frame cylinder. The positioning device comprises a press-down positioning device and a plurality of rotatable angle positioning devices, wherein the press-down positioning device is used for pressing down the middle of the workblank, and the rotatable angle positioning devices are used for pressing down the outer contour of the workblank. The control system controls the movable portal devices to move according to machining movement trails of a cutter and controls single or multiple positioning device bodies in the positioning device to loosen to make way for a cutter path. The base-adjustable fixture for the elongated workpiece with the outer contour needing to be milled has the advantages that deformation of the elongated workpiece during machining is avoided, machining efficiency is improved, the positioning device can be controlled to make way for the machining path of the cutter, operation safety is improved and machining precision is high.

A device used for generating QPSK millimeter wave of radio frequency optical fiber transmission system consists of semiconductor laser of central station, polarization controller, optical phase modulator, optical comb fiber, optical QPSK modulator, optical branching unit/combining unit, optical detector of base station, narrow band band-pass filter, millimeter wave amplifier and millimeter wave antenna. Its optical modulating method for obtaining QPSK modulated millimeter wave signal is also disclosed.

The invention provides an annular supersonic velocity spray pipe and a design method thereof. The design method for the annular supersonic velocity spray pipe comprises the following steps of: predicting a flow field parameter in a transonic velocity segment area, and extracting an initial characteristic line from the flow field parameter; determining the mach number distribution of a supersonic velocity upright wall of the spray pipe according to design requirements; and determining a supersonic velocity curved wall molded surface of the spray pipe by a characteristic line method according to the initial characteristic line and the mach number distribution of the supersonic velocity upright wall. According to the design method for the annular supersonic velocity spray pipe, compression waves are not concentrated in a flow field of the designed annular supersonic velocity spray pipe, the distribution of the flow field parameter can be optimized according to actual application, and thequality of the flow field of the annular supersonic velocity spray pipe can be greatly improved. According to the annular supersonic velocity spray pipe, the design method for the annular supersonic velocity spray pipe is utilized.

The invention relates to the technical field of microwave absorption, in particular to a graphene-based ternary composite wave-absorbing material and a preparation method thereof. The preparation method comprises the steps of firstly, preparing silicon dioxide-coated carbonyl iron core-shell composite particles by using a sol-gel method, then preparing graphite oxide by using an improved Hummers method, evenly dispersing the graphite oxide into dispersion liquid of the silicon dioxide-coated carbonyl iron core-shell composite particles, and finally, using an ultrasonic reduction method to enable graphite oxide to be reduced into graphene so as to prepare the graphene-based ternary composite wave-absorbing material. The preparation method provided by the invention is simple and efficient; the prepared composite wave-absorbing material is more excellent in wave absorbing performance, high in wave absorbing strength, wide in wave absorbing bandwidth and smaller in density compared with a pure carbonyl iron binary composite wave-absorbing material and a pure graphene and carbonyl iron or graphene binary composite wave-absorbing material; the graphene-based ternary composite wave-absorbing material also has regulation performance, and can realize strong wave absorption under different frequencies by adjusting the thickness of a coating layer SiO2, the mass ratio of graphene to the coated core-shell composite particles and the thickness of the ternary composite material.

The invention provides an auxiliary wheel mechanism of a double-body vehicle, belonging to the field of mechanical technology. The auxiliary wheel mechanism solves the technical problems that the existing single-body vehicle has poorer balance and stability when in low speed, etc. The auxiliary wheel mechanism of the double-body vehicle is arranged at the lower part of bodyworks of single-body vehicles, and the double-body vehicle is formed by combining the left single-body vehicle and the right single-body vehicle which can run independently. The auxiliary wheel mechanism comprises a wheel carrier and two auxiliary wheels, wherein the two auxiliary wheels are arranged on the wheel carrier and respectively positioned at the two sides of rear wheels of the single-body vehicles; and liftingdrive structure which is used for driving the wheel carrier to lift correspondingly to the bodyworks of the single-body vehicles is arranged between the bodyworks of the single-body vehicles and the wheel carrier. The auxiliary wheel mechanism can improve the stability and the balance of the single-body vehicles in the double-body vehicle, has simpler structure and low production cost, can automatically control the auxiliary wheels to be lifted up and down along with the change of vehicle speed, and has intelligence and adjustability.

A semi-quantitative risk analysis method for the gas pipeline industry based on a risk matrix includes the following steps: (1) determining accident probability grades of the risk matrix; (2) determining seriousness grades for personal loss consequences of accidents; (3) determining seriousness grades for environmental loss consequences of the accidents; (4) determining seriousness grades for property loss consequences of the accidents; (5) determining seriousness grades for reputation effect consequences of the accidents; (6) determining accident consequence seriousness grades of the risk matrix; (7) determining accident scenario risk grades; (8) achieving corresponding functions of the risk matrix through relevant software. The semi-quantitative risk analysis method provided by the invention includes five sub-modules: an information acquisition and input module, an accident probability module, an accident consequence seriousness module, a risk grade judging module, and a risk result output module; each sub-module is provided with specific and detailed computation and assessment methods, so that accident scenario risks can be specifically and strictly defined.

The invention discloses a preparation method of a material with nitric oxide (NO) catalytic activity. The preparation method is implemented through the steps that a selenium-containing compound with nitric oxide catalytic activity, a sulfur-containing compound, a soluble copper salt, a compound with an o-phenol structure, a flavonoid compound, and a flavonol compound or a flavanone compound are mixed in a buffer solution and then polymerized. The material with NO catalytic activity not only can be applied to the surface modification of materials which are different in material, geometrical shape and topological structure, and also can be used as a filling material for a controlled release system. Double selenium bonds, double sulfur bonds, copper ions and phenolic hydroxyl groups, which are contained in the prepared material with nitric oxide (NO) catalytic activity, have an excellent free radical removal function; the selenium bonds, the sulfur bonds and the chelate copper ions, which are contained in the material, also have a reduced glutathione (GSH) response function; in addition, the copper ions containing in the material also have an antibacterial function; and the material, besides being used for catalyzing NO release, also can be applied to all related fields of free radical removal and GSH response function.

The invention discloses a method for adjusting nitrogen content in carbon-nitrogen based monatomic ferrous catalyst. The carbon-nitrogen based monatomic ferrous catalyst with adjustable nitrogen content is prepared by taking different types of N-containing organic molecules as C/N sources and ferric salt as Fe source; dispersing the N-containing organic molecules and ferric salt in organic solvent; stirring the mixture to make it react; after finishing the reaction, removing solvent and drying components; performing high-temperature pyrolysis on the obtained mixture under the nitrogen atmosphere ( 700-1000 DEG C); performing acidification, centrifugation, washing, drying and other processes on the product; performing the secondary high-temperature pyrolysis on the product to obtain the catalyst. The invention provides a simple and effective preparation method of carbon-nitrogen based monatomic ferrous catalyst with adjustable nitrogen content; the preparation method is simple and economical, and applicable to the industrial large-scale production.

The invention discloses slow release urea containing gamma-polyglutamic acid and a urease inhibitor. The slow release urea is obtained by spraying a coated slow release solution onto the outer surface of urea particles and drying, wherein the coated slow release solution contains gamma-polyglutamic acid and a urease inhibitor. The invention further discloses a preparation method of the slow release urea. The gamma-polyglutamic acid and the urease inhibitor in the slow release urea have synergic actions, and the gamma-polyglutamic acid can form a layer of protective film on the surfaces of a fertilizer and the urease inhibitor, so that the utilization ratio of the fertilizer is increased, and environmental pollution is lowered.

The invention discloses a gamma-polyglutamic acid and naphthylacetic acid combined type rooting agent, which contains pure biological fermentation active components including gamma-polyglutamic acid, naphthylacetic acid, indolebutyric acid, MgSO4, HBO3, Na2MoO4 and the like. The invention further discloses a using method of the rooting agent. The rooting agent has high active biological functions, wherein the gamma-polyglutamic acid and the naphthylacetic acid respectively have synergetic effects. The gamma-polyglutamic acid and naphthylacetic acid combined type rooting agent can accelerate the plant root cell division speed, promote rootage and root enhancing and improve absorbing capacity of root systems to nutrition, and is suitable for transplantation of vegetable seedlings including tomatoes, green vegetables, cucumbers, hot peppers, rapes and the like and cottage or transplantation of woody trees and flowers and plants which are difficult in rootage.

The invention relates to the technical field of optical protection film, especially to an electrochromic privacy film and its preparation method. The electrochromic privacy film comprises a film protection layer, a first adhesive layer, a hardening layer, a first main film layer, a shutter layer, a second main film layer, a second adhesive layer and a stripping layer which are successively arranged from top to bottom. An electrode is connected between the upper surface and the lower surface of the shutter layer. The electrochromic privacy film has high light transmittance and adjustability of the privacy function. In an easy-peeping environment, by starting an electrode switch, the protective film can undergo electrochromism to have the privacy function. In a safe environment, by shutting the electrode, the privacy function can be cancelled.

The invention relates to a cleaning robot capable of automatically adapting to a pipeline inner diameter. The cleaning robot comprises a central rack body, an ultrasonic device, a cleaning device, a control device and a plurality of roller devices which roll along the inner wall of a pipeline, wherein the roller devices are uniformly arranged on the central rack body in the peripheral direction; the ultrasonic device is mounted at the front end of the central rack body; the cleaning device is mounted at the rear end of the central rack body; and the ultrasonic device, the cleaning device and the roller devices are in signal connection with the control device. The cleaning robot can automatically adapt to the changes of the pipeline inner diameter and can realize a turning function, and belongs to the technical field of the cleaning robots.

The invention provides a porous bioglass/chitosan/silk fibroin composite material and its preparation method. The porous bioglass/chitosan/silk fibroin composite material is characterized in that a silk fibroin scaffold is included; chitosan is combined on the surface of the silk fibroin scaffold; and porous bioglass is combined on the surface of chitosan. The silk fibroin scaffold is used as a substrate and is combined with chitosan and bioglass particulate. Overall biocompatibility and degradation property of the material are guaranteed, and the material has a certain mechanical strength. In addition, each component can give play to its own functions separately, so as to make up performance deficiency of a single material. Thus, the material becomes an excellent tissue engineering material which has good biocompatibility and degradability, has effects of antibiosis and growth-promotion and has a certain mechanical strength.

The present invention relates to an antioxidant silicon arbide pouring material, belonging to the field of refractory material technology. Its composition includes: large crystal silicon carbide granules whose grain size is less than or equal to 7 mm 68-72%, alumina cement 2-12%, silicon carbide matrix whose grain size is less than or equal to 320 meshes 8-10%, alpha-Al2O3 micrpowder whose grain size is less than or equal to 4 micrometers 5-6 %, SiO2 micropowder whose grain size ia less than or equal to 1 micrometer 4-5 % and boric acid 0.1-0.3% and composite antioxidant 1-2%. Said pouring material raises resistance to oxidation, reduces porosity, raises resistance to slag corrosion, can make its service time have adjustability, and can improve furnace adaptability, and can raise the service life of incinerator.

The invention discloses an adjustable combined clamp which is used for clamping a decorative hood of a fog lamp. The adjustable combined clamp comprises a clamp base plate, a support platform, a first clamping assembly, a second clamping assembly and two fastening assemblies, wherein a sleeve part of the decorative hood of the fog lamp is placed on the support platform; the first clamping assembly is used for clamping a first matching part of a first connecting handle of the decorative hood of the fog lamp; and the second clamping assembly is used for clamping a second matching part of a second connecting handle of the decorative hood of the fog lamp. The two fastening assemblies are located at two opposite sides of the sleeve part and are used for fastening the sleeve part. The adjustable combined clamp, disclosed by the invention, has the advantages of better uniformity and capability of adjusting according to appearance of the decorative hood of the fog lamp freely so as to clamp and locate the decorative hood of the fog lamp.