90results about How to "No stringent requirements" patented technology

The invention relates to a preparation method of a graphene-based surface strain sensor. The method comprises the following steps: (1), preparing graphene oxide dispersion liquid; (2), spraying the graphene oxide dispersion liquid on a substrate to form a thin graphene oxide film; (3), carrying out chemical reduction or ultraviolet irradiation on the thin graphene oxide film to form a thin graphene film; (4), connecting two copper electrodes to the two ends of the thin graphene film by conducting resins and connecting an ohm gauge between the two electrodes; and (5), spraying or brushing a high molecular solution on the thin graphene film continuously to form a high-molecular latex film. Compared with the prior art, the thin graphene oxide film is prepared by spraying; reduction is carried out by using a certain means; and then the graphene-based surface strain sensor is prepared. Because the operation is simple, the cost is low, and large-scale preparation can be realized well, the preparation method can be applied to the heath monitoring of the building structure.

The invention provides a preparation method of a thin film transistor of a flexible electronic device. The method comprises the following steps of: (1) preparing a bendable and stretchable substrate; (2) stretching the substrate, and coating an adhesive on a surface of a stretched rubber substrate; (3) depositing a gate on the substrate; (4) depositing an organic dielectric layer unit on the device which is processed in the step (3); (5) respectively depositing a source unit layer and a drain unit layer on the organic dielectric layer unit; (6) loosening the substrate, releasing loads which are acted on the substrate, and carrying out heat treatment to eliminate an interface stress and a pressure stress of the device; and (7) depositing the organic dielectric layer unit. The invention provides the method for mechanically stretching the substrate, so the channel width of the device is reduced, manufacturing accuracy is improved effectively, and the resolution ratio of the flexible electronic device is improved.

The invention discloses an ultrathin nano-scale anticorrosion coating and a self-leveling dip-coating process thereof. The ultrathin nano-scale anticorrosion coating does not contain metal and has ultra-strong scraping resistance, wear resistance and corrosion resistance. The coating has a good self-leveling effect in a coating process and can be used for replacing traditional electro-galvanizing and hot galvanizing processes, and after dip-coating, a coating layer is ultra-thin, wide in adaptability and low in production cost. According to the technical scheme, the ultrathin nano-scale anticorrosion coating contains the following components in percentage by weight (100% in total): 10%-40% of modified resin, 2%-5% of a curing agent, 0.1%-0.5% of a curing accelerator, 2%-8% of an anticorrosion inhibitor, 1%-2% of a nano-scale wax powder, 0.01%-0.05% of graphene powder, 5%-15% of a metal composition and 30%-70% of a solvent.

The invention discloses a method for purifying N-methyl pyrrolidone and gamma-butyrolactone, which comprises the following steps of: making a reagent to be purified pass through a polystyrene-divinylbenzene type nonpolar macroporous resin column, filtering by using a charged cellulose membrane, and performing rough filtration and fine filtration on filtrate in turn by using polytetrafluoroethylene filters in different dimensions. The method has the advantages of simple process, easily controlled conditions, low energy consumption, no rigorous requirement on power equipment, no need of special temperature control conditions and effective production under conventional temperature, and is used for recovering and purifying the N-methyl pyrrolidone and the gamma-butyrolactone, and the purity of the obtained reagent can reach an electron level; meanwhile, materials such as the macroporous resin can be used as fuel to be reutilized, and are light in environmental pollution; and the process has a larger application space and good market prospect.

The invention relates to one-way moisture-guiding knitted double-faced fabric and a processing method thereof, belonging to the technical field of knitted fabric. The one-way moisture-guiding knitted double-faced fabric comprises a face structure and a bottom structure, wherein the face structure is made of hydrophilic fiber and the bottom structure is made of hydrophobic fiber. The processing method comprises the following steps of: weaving; preprocessing; presetting; dyeing; and after treatment. The invention has the advantages that since the hydrophilic fiber is used for the face structure and the hydrophobic fiber is used for the bottom structure, the one-way moisture guiding effect is excellent and durable, the material of the hydrophilic fiber and the hydrophobic fiber forming the face structure and the bottom structure is wide in source and low in price so as to be conductive to reducing the cost and lead the fabric to meet the popular consumption needs; the provided processing method does not need to put grey cloth into a cylinder in the pretreatment process like the existing technology; and the whole processing method is simple in the process steps, has no demanding requirement and can guarantee that the fabric has stable one-way moisture guiding property.

The invention belongs to a preparation method of nuclear fuel, and concretely relates to a preparation method of thorium-uranium mixed oxide ceramic microspheres. The method uses an internal gelation method, and comprises using an acid-lacking uranyl nitrate solution and thorium nitrate as raw materials, preparing sol, dispersing gelling, washing, drying, calcining and reduction sintering to prepare ThO2-UO2 microspheres with a diameter of 0.05-0.20 mm. The ThO2-UO2 microspheres has outstanding advantages of smooth surface, good sphericity, compact inside, uniformly distributed thorium, and a density being greater than 96.8% TD; and the method is simple, and can prepare the thorium-uranium mixed oxide ceramic microspheres with different thorium contents.

The invention relates to an analysis method for rock sample lithology denomination based on X-ray element fluorescence. The lithology of an unknown rock sample is analyzed and denominated by using an X-ray fluorescence spectrometer. The analysis method comprises the following steps of: firstly, determining element types used when various lithologies are analyzed, and then, storing element content data of measured known-lithology rock samples in the region into a template database; automatically identifying the expected value and the standard difference of normal distribution of elements by software according to the used element types and template database; calculating the probability value of the lithology of the sample according to the sample element content, the expected value and the standard difference; and finally, taking the name of the lithology with the highest probability value as the name of the lithology of the rock sample. By using the method, the accuracy in denomination of the lithology is improved in analysis of high-dimensional elements in on-site logging of a complex strata of an oil field through carrying out statistics, classification and analysis on the known lithology and then establishing a template; and the implementation of the method has no rigorous requirement for personnel for establishing the template, so the method is conveniently popularized and applied to on-site logging operation of the oil field.

The invention relates to an adrenocorticotropic hormone solution and application thereof. The solution is prepared from adrenocorticotropic hormone antigen, 2-morpholinoethanesulfonic acid, NaCl, trehalose, casein, 4-aminoantipyrine and water. The invention provides a preparation method of the adrenocorticotropic hormone solution and the application of the adrenocorticotropic hormone solution. Thepreparation method of the solution is simple and cost-saving, and a technological process is controllable; a finished product has good stability and can be maintained for 7-14 days at the temperatureof 37 DEG C, and the titer retention rate is still greater than 85%; after the finished product is stored for 12 months at the temperature of 2-8 DEG C, the titer retention rate is greater than 90%;the adrenocorticotropic hormone solution can be used as a calibration product or a quality control product of adrenocorticotropic hormone for performing in vitro quantitative detection on the adrenocorticotropic hormone in human plasma, thus having good clinical application prospect.

A method for fast preparing soluble near infrared CdTe quantum dots covered with mercaptan in aqueous phase relates to the preparation field of quantum dot. The method comprises the following steps: (a) adding NaBH4 or KBH4 and Te powder, adding deionized water to react at the room temperature under magnetic stirring and prepare NaHTe or KHTe solution; (b) preparing cadmium salt or cadmium oxide, cadmium hydroxide and cadmium sulfhydryl compound solution; (c) adding the solution obtained in the step (b) in a three-necked bottle, protecting with argon, stirring; (d) adding fresh and oxygen-free NaHTe or KHTe solution prepared in the step (a) in the three-necked bottle of the step (c); and (e) heating and refluxing to react and obtain the near infrared CdTe quantum dots. The method of the invention has simple operations, mild conditions and low cost and toxicity. The synthetized mercaptan modified CdTe quantum dots have good water-solubility and stability; and the fluorescence quantum yield is high and the emission spectrum can be adjusted in the near infrared region.

The invention discloses an adaptive variable frequency animation device in a metro tunnel. The device comprises animated images (1), strobe light sources (2) and a train speed synchronous controller, and is characterized in that: the animated images (1) are a series of progressively evolved plane images which are arranged at positions where passengers in carriages conveniently view the animated images through train windows along a train advancing direction in a metro or train tunnel wall at an equal interval; the strobe light sources (2) are arranged at proper positions on the outer surfaces of the carriages of a train and triggered by triggering signals of the train speed synchronous controller, and can irradiate the animated images (1) by facing the animated images; and the triggering frequency of the train speed synchronous controller over the strobe light sources (2) is required to be consistent with the movement frequency of the animated images (1) relative to the advancement of the train. When the train is advanced in the metro tunnel, a vivid animation advertising effect can be achieved. The device has the advantages of small investment, remarkable effect, no strict requirements on an implementation environment, energy saving, freedom from the influence of train speed variation, high adaptability and the like, and is easy to implement.

The invention discloses a method for preparing high-dispersion nitrogen-doped graphene. The method comprises the following steps: under the condition of water bath of 80 DEGC, in the absence of other oxidant, performing in-situ oxidation polymerization of pyrrole on the surface of oxidized graphene to obtain polypyrrole (PPy) by utilizing the oxidizability of oxidized graphene (GO), thereby obtaining a PPy / rGO compound, and carrying out high-temperature calcination on the PPy / rGO compound, to obtain the high-dispersion nitrogen-doped graphene. The PPy layer can not only be used as a nitrogen-doped nitrogen source, but also be uniformly polymerized on the surface of GO to effectively expand a GO flake layer, and thus GO can be prevented from agglomeration; as oxidized graphene and polypyrrole are uniformly 'grown' together, nitrogen loss in the calcinations process can be effectively prevented, and thus the high-dispersion nitrogen-doped graphene with high nitrogen content can be obtained. The method for preparing high-dispersion nitrogen-doped graphene only relates to simple water bath reaction and thermal treatment process, the whole preparation process is simple, and large-capacity production can be facilitated.

The invention provides a negative electrode material, a negative electrode plate, a preparation method of the negative electrode plate and an all-solid-state lithium ion battery. The negative electrode material comprises coated lithium powder; silicon carbon powder; a conductive agent; and a solid electrolyte, wherein the coated lithium powder comprises lithium powder and a lithium-conducting coating layer coating at least one part of the outer surface of the lithium powder. In the negative electrode material, on one hand, the coated lithium powder is adopted, so that the activity of the coated lithium powder is greatly reduced compared with that of the lithium powder while the lithium can be effectively supplemented, no strict requirements for environment and equipment exist, the compatibility compared with the prior art is high, the production cost is lower, and meanwhile, the operation safety is greatly improved; and on the other hand, the solid electrolyte is added into the negative electrode material, so that the side reaction of the lithium powder and the solid electrolyte can be greatly reduced, the first coulombic efficiency can be effectively improved, and meanwhile, a lithium battery system has higher safety.

The invention discloses a presetting bit precision automatic testing system and a testing method thereof. The presetting bit precision automatic testing system comprises a testing system unit, tested equipment and template placing location unit. The testing method comprises the steps of: placing a calibration template, and adjusting zooming times of a camera so that the calibration template occupies an appropriate field-of-view scope of a lens; inputting a distance into a control module for setting; clicking calibration to run the calibration template, so as to obtain a transformation model of image pixels and spatial positions; setting a presetting bit for acquiring an image; recalling the presetting bit for acquiring an image; matching the images of the presetting bit and calculating a pixel deviation; calculating a rotation angle deviation of the tested equipment; testing presetting bit deviations of a uniform presetting bit under different control; and testing presetting bit deviations at different positions. Compared with the prior art, the presetting bit precision automatic testing system based on image processing disclosed by the invention is simple and rapid in system installation, has automatic testing operation, is more complete in tests, and achieves high test precision in the actual application.

The invention belongs to the technical field of organosilicone and discloses a quaternary ammonium salt modified diamine-terminated polydimethylsiloxane emulsion and a preparation method and an application thereof. The emulsion provided by the invention comprises the following components which are obtained by performing a reaction in water in parts by mass: 100 parts of diamine-terminated polydimethylsiloxane, 0.5-100 parts of quaternary ammonium salt with epoxy groups and 10-300 parts of a nonionic emulsifier. The quaternary ammonium salt modified diamine-terminated polydimethylsiloxane emulsion provided by the invention is prepared in an emulsifying system, so that the problem that the reaction rate is low as materials are not dissolved by one another is solved, and no organic solvents are needed, and the emulsion is high in flexibility and high in practicality; a quaternary ammonium salt functional group is introduced into the molecular framework thereof, so that the product performance of diamine-terminated polydimethylsiloxane is further improved, the stability is good and the anti-yellowing ability is strong. The quaternary ammonium salt modified diamine-terminated polydimethylsiloxane emulsion provided by the invention is simple and feasible in production process, short in production period, free of strict requirements on production equipment, and easily available in raw material, can easily realize industrial production, and provides a conditioning aid which is unique in performance for daily use chemicals and textile industries.

The invention discloses a current-driven ultralarge impeller power generation method and river channel dredging method, and is an originality invention design with innovation. The method is a power generation method which uses current potential energy formed by tide current of a river, brook and ocean to drive ultralarge impellers to obtain mechanical energy and converts the mechanical energy into electrical energy. The method comprises the steps: using carrier forms of a boat carrier 1, a bridge mast, a platform and the like in the river, brook and ocean, connecting an anchor pile struck into the bottom with anchor cables 2 and 3 to anchor and position, driving the ultralarge impellers 4 by using the current of the river and the tide of ocean to form huge mechanical energy, and using a mechanical energy output chain or a transmission shaft body 6 to output to drive a governor and a generator for power generation, wherein in the picture, 5 refers to an adjustable hanger of the ultralarge impellers 4, 7 refers to the height of the water surface, 8 refers to the impact vortex of the impellers on the water bottom, the ultralarge impellers borne by the boat carrier can also perform dredging on the river channel wherein a hull is located during the up-down left-right moving of the hull, and the resources are comprehensively utilized.

The invention discloses an intermediate of a flavonoid compound shown in a formula K and a preparation method thereof. In the heterogeneous solution of a non-protonic solvent and water, under the action of an alkaline reagent and a phase transfer catalyst, the compound shown in the formula L reacts with 2,3,4,6-tetraphenyl formyloxy bromo-glucose shown in the formula H, wherein R1 is -CO(CH2)nCH3 or benzoyl; n ranges from 0 to 8; and Bz is the benzoyl. The invention also relates to application of the intermediate of the flavonoid compound shown in the formula K in preparation of the flavonoid compound shown in the formula A. Compared with the conventional method for separating and extracting the flavonoid compound shown in the formula A from the plant, the method for preparing the flavonoid compound shown in the formula A from the intermediate of the flavonoid compound shown in the formula K can realize large-scale industrialized production, and has the advantages of simple steps, no special reagent or harsh requirements on reaction conditions, and high yield and purity.

The invention discloses a preparation method of a conductive adhesive hydrogel. The method comprises the following steps of: carbon nanotubes are modified by dopamine; the modifiedcarbon nanotubes aregrafted to saccharides containing free carboxyl through an amide reaction; mixing acrylamide, the modified carbon nanotubes and the modified saccharides, and forming the hydrogel under the actions ofa crosslinking agent and an initiator. The modified carbon nanotubes can be stably dispersed in an aqueous solution and form hydrogen bonds with other substances and crosslinks with dynamic supramolecules in the hydrogel; the sugar grafted with the dopamine catechol structure can form a hydrogel network, so that the complexity of the hydrogel structure is improved, and the biocompatibility, the adhesion property and the toughness of the hydrogel are enhanced; the hydrogel has physicochemical properties such as electrical conductivity, self-adhesion, high toughness and biocompatibility. The method can be used for preparing conductive hydrogels in the fields of biomedicine, electronic skin, human-computer interface, human body activity monitoring, wearable electronic equipment and the like.

The invention discloses a co-precipitation preparation method of a ZrO2 / Gd203 composite ceramic material for nuclear power. The co-precipitation preparation method comprises a pre-preparation process of a zirconium-gadolinium mixed solution, a preparation process of zirconium-gadolinium mixed precipitates and the like. The co-precipitation preparation method comprises the following steps of: firstly dissolving and mixing zirconyl nitrate deionized water, gadolinium oxide powder, nitric acid and ammonia water which are used as raw materials, then precipitating and mixing so as to form uniformly mixed preparation raw materials, and finally carrying out follow-up reduction treatment so as to obtain the ZrO2 / Gd203 Gd2O3 composite ceramic material. The co-precipitation preparation method has no strict requirements on processing equipment and is easy to realize. The vacuum sintering is carried out, and the sintering temperature is controlled at 1500 DEG C to 1650 DEG C. The ZrO2 / Gd203 composite ceramic material prepared by the method has good sintering property and relatively good microstructure, mechanical strength and density (theoretical density greater than 96% T.D).

The invention discloses a method for preparing flavonoid compounds shown in formula A, which comprises the following step: performing dehydroxylation protecting group reaction of the compounds shown in a formula B in a mixed solvent of a non-protonic solvent and an alcohol solvent under the action of an alkaline reagent to form the flavonoid compounds shown in the formula A, wherein R1 is -CO (CH2)n CH3 or benzoyl, n is 0 to 8, and Bz is benzoyl. The invention also relates to a new intermediate compound shown in the formula B and a preparation method thereof. Compared with the conventional method for extracting the flavonoid compounds shown in the formula A by separating from plants, the synthesis method of the invention makes the large-scale industrialized production of the compounds become possible; and the method of the invention has simple steps, has no strict requirements on a special reagent and reaction conditions, and has higher yield and purity.

The invention discloses a lamp focal length adjusting mechanism. A lamp light source is connected with a lamp radiator housing; an adjusting assembly is connected with the lamp radiator housing; the lamp light source is fixedly mounted on the lamp radiator housing through a light source bracket and fixing screws; the adjusting assembly comprises a rotating ring, a focusing lens, a lens fixing ringand a silica gel adjusting ring, wherein the focusing lens is mounted in the lens fixing ring in a snap joint manner; a protruding strip on each of two sides of the lens fixing ring corresponds to agroove in the corresponding side of the lamp radiator housing, and is mounted in the lamp radiator housing; the rotating ring is clamped on the lamp radiator housing, and positioning protruding pointsin the rotating ring correspond to oblique grooves of the lens fixing ring; and the smooth surface of the silica gel adjusting ring is connected to a groove in the outer wall of the rotating ring ina sleeving manner. Through the adoption of the lamp focal length adjusting mechanism disclosed by the invention, the problems that in the prior art, in the process of lamp focal length adjustment, themachining accuracy requirement is high, the processing cost is high, the adjusting process is not smooth and the mechanism is unstable after being used for a long term, are solved; and the lamp focallength adjusting mechanism is simple and compact in structural dimension, low in cost, and stable in effect.

The invention discloses a preparation method for an organic silicon-modified printing adhesive. The preparation method comprises the following steps of: preparing an organic silicon pre-emulsion: adding 80-140 parts by weight of deionized water, 3-7 parts by weight of a compounding emulsifier, 8-12 parts by weight of an organic silicon monomer and 0.1-0.2 part by weight of a silane coupling agentinto a reaction kettle, stirring at the room temperature for 40-70 minutes, heating to 75-90 DEG C, and reacting at the temperature for 110-130 minutes to obtain the organic silicon pre-emulsion; andpreparing a printing adhesive: controlling the temperature of the organic silicon pre-emulsion at 75-85 DEG C, dropwise adding an acrylate monomer and an initiator in sequence while stirring at the high speed of 1,000 revolutions per minute within 2 hours, heating to 4-6 DEG C, preserving heat for reacting for 25-35 minutes, cooling, and adjusting the pH to 6-7 with sodium hydroxide to obtain theorganic silicon-modified printing adhesive. The preparation method has the advantages of simple process steps, high storage stability, washability, superior softness and contribution to environmentalfriendliness.

The invention discloses a method for preparing a 2-substituted-2-adamantane alcohol compound. The method comprises the step of reacting 2-adamantanones and borates with a halogenated compound under the action of zinc powder to prepare the 2-substituted-2-adamantane alcohol compound and has the advantages of no need of air isolation, mild conditions, simple and convenient process and lower cost, and the obtained product, i.e., the 2-substituted-2-adamantane alcohols compound, can be refined through conventional methods such as water washing, concentration, filtration, recrystalization and the like and is high in yield. The method has no rigorous requirement for a solvent, preferably n-butyl ether which is beneficial to realization of high solvent recover rate and has good separation property with water, therefore, organic matters carried in wastewater are greatly reduced, and the method has a better industrial prospect.

The invention discloses a method for modifying a polydimethylsiloxane material. The method comprises the following steps of: carrying out selective oxidation on carbohydrate containing carboxyl through sodium periodate to obtain oxidized carbohydrate containing active aldehyde groups; grafting dopamine onto the oxidized carbohydrate through amidation reaction by utilizing the reaction of amino andcarboxyl, thereby obtaining carbohydrate containing a catechol structure and an active aldehyde group; then pretreating a polydimethylsiloxane material to expose oxygen-containing groups on the surface of the polydimethylsiloxane material; and connecting bioactive collagen to the surface of the polydimethylsiloxane material by taking oxidized polysaccharide containing the catechol structure as abridge, so as to perform surface functional modification on the polydimethylsiloxane material, thereby obtaining the polydimethylsiloxane material with good and non-temporary hydrophilicity and excellent biocompatibility. Thus, a new way is opened up for preparation of a new generation of biocompatible and hydrophilic polydimethylsiloxane material. The method can be used for preparing biomedical materials.

The invention discloses a power generation method for realizing superpower automatic circulation and automatic compensation-output by means of buoyancy and gravity, and relates to an initiative power generation method capable of obtaining superpower automatic circulation and automatic compensation-output by means of buoyancy and gravity. Buoyancy-gravity components consisting of dozens of buoyancy-gravity cylinders 7 and gravity slide blocks 8 rotate surrounding upper and lower large rotating wheels 18 and 21 on circulating chains 16 and 17 in sequence of 1-6 in river, lake and sea reservoirs and artificial deepwater environments; at the position 1, the buoyancy-gravity components descend to exhaust air;when the buoyancy-gravity components are at the position 2, the gravitational potential energy moves from the position 2 to the position 3; at the position 4, the buoyancy-gravity components begin to ascend, and sucks from air volume bins 12 and 13 through pipes 9, 10 and 11 to form buoyancy energy; after the two energies are transferred to a speed adjustor 24 in an equipment room 26 through a power tooth wheel 19 and a power transmission chain 20, an electric generator 25 generates electricity; an air external connecting pipe is labeled as 14; an air pressure bin is labeled as 15; a pile frame body is labeled as 22; and a water platform is labeled as 23.

The invention discloses an intermediate of a flavonoid compound shown in a formula L and a preparation method thereof. In the mixed solvents of a non-protonic solvent and an alcohol solvent, under the action of an alkaline reagent, the compound shown in the formula M undergoes selective dehydroxylation protecting group reaction, wherein R1 is -CO(CH2)nCH3 or benzoyl; and n ranges from 0 to 8. The invention also relates to application of the intermediate of the flavonoid compound shown in the formula L in preparation of the flavonoid compound shown in the formula A. Compared with the conventional method for separating and extracting the flavonoid compound shown in the formula A from the plant, the method for preparing the flavonoid compound shown in the formula A from the intermediate of the flavonoid compound shown in the formula L can realize large-scale industrialized production, and has the advantages of simple steps, no special reagent or harsh requirements on reaction conditions, and high yield and purity.

The invention discloses a polypropylene material with high melt strength and a preparation method thereof. The polypropylene material with high melt strength is prepared from the following components in parts by weight through the manner of extrusion reaction grafting through an extruding machine: 100 parts of polypropylene, 1-4 parts of a cross-linking agent, 0.1-1 part of benzoyl peroxide paste and 0.1-1.5 parts of an antioxidant, wherein the fusion index of polypropylene is 6-15g / 10min and the mass percent of benzoyl peroxide in the benzoyl peroxide paste is 50%-55%. According to the preparation method for the polypropylene material with high melt strength disclosed by the invention, three screw rods are adopted for rotating the extruding machine in a homodromous parallel manner. The melt strength of the polypropylene material with high melt strength produced according to the invention is 1.5-15 times that of the main component polypropylene; the polypropylene material has high heat resistance, excellent strain-hardening effect and mechanical properties; the structure can be controlled according to the requirement; the polypropylene material can be widely applied to the fields of polypropylene foaming and thermal forming.

The invention belongs to the technical field of shield construction engineering and relates to a shield construction soil discharge quantity real-time on-line measuring device based on a pin wheel device. The shield construction soil discharge quantity real-time on-line measuring device comprises the pin wheel device, wherein the pin wheel device is arranged at the soil outlet part of a spiral conveyer of a shield machine and is arranged in a plane vertical to the residue soil direction. The pin wheel device comprises a pin wheel, a pin wheel shaft, a left box body, a right box body and a shaft coupler, and the pin wheel shaft is connected with a rotary encoder through the shaft coupler. A control part is used for carrying out storage, preprocessing, integrating and display operation on original data, the cross section value of the soil outlet is integrated with the output speed of the rotary encoder by software, and the soil discharge quantity volume is obtained. The measuring device is applicable to conditions that the shield machine passes through humid soil layers with a certain viscosity, and the outlet soil of the spiral conveyor can form humid column bodies with a certain viscosity, the accurate and real-time measurement of the soil discharge volume is realized, the precision and the real-time performance of the original measuring method is improved, and the shield construction requirements are met.

The invention relates to a preparation method of a fiber-reinforced silicon nitride composite material. The preparation method comprises the following steps: (1) preparing a fiber preform from siliconnitride fibers, and carrying out impregnation treatment on the fiber preform by polysilazane to obtain an impregnated fiber preform; (2) carrying out an initial curing reaction on the impregnated fiber preform at a first curing temperature, and when the polysilazane is changed from a flowing state to a semi-flowing state, continuing to carry out heat preservation at the first curing temperature until the polysilazane is in a jelly state, so as to obtain an initial cured fiber preform; (3) removing the polysilazane cured product on the surface of the initially cured fiber preform, and carryingout secondary curing reaction on the fiber preform at a second curing temperature to obtain a secondary cured fiber preform; (4) carrying out cracking reaction on the secondary cured fiber preform toobtain a cracked fiber preform; and (5) repeating steps (1) to (4) on the cracked fiber preform for at least one time.

The invention discloses an intermediate of a flavonoid compound shown in a formula C and a preparation method thereof. In the mixed solvents of a non-protonic solvent and an alcohol solvent, under the action of a catalyst for catalytic hydrogenation, the compound shown in the formula D undergoes catalytic hydrogenation to remove benzyl, wherein R1 is -CO(CH2)nCH3 or benzoyl; n ranges from 0 to 8; Bn is the benzyl; and Bz is the benzoyl. The invention also relates to application of the intermediate of the flavonoid compound shown in the formula C in preparation of the flavonoid compound shown in the formula A. Compared with the conventional method for separating and extracting the flavonoid compound shown in the formula A from the plant, the method for preparing the flavonoid compound shown in the formula A from the intermediate of the flavonoid compound shown in the formula C can realize large-scale industrialized production, and has the advantages of simple steps, no special reagent or harsh requirements on reaction conditions, and high yield and purity.

The invention relates to a preparation method of a solution-dispersible polypyrrole copolymer. The method comprises the following steps: mixing a soluble polymer, an initiator and a pyrrole monomer under an air condition, and carrying out irradiation treatment by utilizing high-energy rays to obtain the polypyrrole copolymer. Compared with the prior art, the raw materials, the pyrrole monomer, the soluble polymer, the initiator and the like used in the method are commercially available reagents easy to obtain, special treatment is not needed, the reaction condition is mild and easy to control, one-step completion is achieved, and the method has the advantages of being easy and convenient to operate, capable of saving energy consumption, environmentally friendly, wide in application range and the like; and the polypyrrole copolymer prepared by the method can be stably dispersed in water or most of organic solvents, the defect that polypyrrole is insoluble and non-meltable is overcome, and the polypyrrole material is endowed with good processability.