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52results about How to "Good technical foundation" patented technology

AFP (Alpha-Fetoprotein) testing kit (time-resolved fluoroimmunoassay) for prenatal screening and preparation method thereof

The invention relates to an alpha-fetoprotein testing kit (time-resolved fluoroimmunoassay) applicable for mid-pregnancy prenatal screening and a preparation method thereof. The kit comprises the following main components of an experimental buffer solution, a concentrated washing solution, an enhancement solution, a reaction plate, a standard product and a quality control product of filter paper dried blood spots and a europium marker. The method for preparing the kit according to the invention comprises the following steps of: 1. preparing the experimental buffer solution, the concentrated washing solution and the enhancement solution; 2. coating the reaction plate; 3. preparing the standard product and the quality control product; 4. preparing the europium marker; 5. separately loading; 6. sticking labels; and 7. assembling into a finished product. The invention has the characteristics that the accuracy and the sensitivity of a detected result are high, the stability is good, and a detecting method is economical, convenient and safe and has no traumatic property, has high automation degree, and the like. A filter paper dried blood spot technology is applied to prenatal screening work, which is beneficial to blood specimen collection, storage and transportation and ensures the experimental reliability.
Owner:GUANGZHOU FENGHUA BIOENG

Comprehensive control method for town water pollution in three gorges reservoir area

The invention discloses a comprehensive control method for the town water pollution in the three gorges reservoir area, comprising a method for controlling a series of pollutants such as the town industrial and domestic pollution sources discharged out of the small-town area and the city area, the urban non-point source pollution caused by the rainfall runoff generation and the like, so that the comprehensive control method has the characteristics of being feasible in technology, reasonable in economical efficiency, remarkable in combined effect and the like, and the defect that the existing pollutant control method is single in implementation mode, free from technology support, and free from pertinence can be overcome. By respectively setting a water pollution control method for the small-town area of the three gorges reservoir area and the residential district, the dense population business district and the industrial park of the city region, the comprehensive control method for the town water pollution in the three gorges reservoir area is integrated, so that the powerful technology support can be provided for realizing the total water quality target requirement and the pollution abatement work in the three gorges reservoir area of China, and the example can be provided for the town water pollution control of various hydraulic and hydro-power engineering reservoir areas in the western China.
Owner:CHONGQING UNIV

Permanent magnet brushless DC motor driver control method

The invention discloses a permanent magnet brushless DC motor driver control method. The method is used for control of a motor drive servo control system. The system has relatively good control accuracy and dynamic response performance. The method comprises the steps of firstly reading values of three commutation HALLs through software to obtain an actual position of a rotor when a motor is started, detecting an angular position omega<ref> of the rotor through a rotor position sensor after starting, and simultaneously calculating a speed n of the rotor; detecting a stator current FOC control algorithm to obtain detection values i<d> and i<q>; outputting AC / DC shaft voltage values u<d> and u<q> through a PI adjuster separately, generating voltage values u<alpha> and u<beta> after coordinate transformation to obtain an SVPWM drive signal; and finally outputting sixth paths of control pulse signals and driving six MOSs to drive the motor. The permanent magnet brushless DC motor driver control method is suitable for control of an intelligent obstacle avoidance robot and is achieved by adopting a DSP processor; the control process is achieved through a vector control strategy of which direct axis current is zero; the contradiction between overshoot and the rapidity is solved; the anti-jamming capability of the system is improved; and the high-performance requirement is met.
Owner:STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +3

Spacecraft propellant on-track supplementation system and implementation method and aircraft

The invention provides a spacecraft propellant on-track supplementation system. The system comprises a propellant receiving device; the propellant receiving device comprises a pressurized gas reuse unit, a propellant liquid supplemental path unit and a propellant removal blowing unit. The invention also provides an implementation method for propellant on-track supplementation by using the above-mentioned spacecraft propellant on-track supplementation system, and the method comprises the following steps of a gas injection step, a docking step, a leak detection step, a supplement step, a removalblowing step and a separation step. The invention also provides an aircraft, and the aircraft comprises a plurality of propellant receiving devices in the above-mentioned spacecraft propellant on-track supplement system. The propellant receiving devices are provided with storage box pressurized gas multiple reuse functions, and compared with the method of directly discharging the storage box pressurized gas and then conducting propellant supplement, pressurized gas does not need to be supplemented, and propellant supplement cost is reduced.
Owner:SHANGHAI INST OF SPACE PROPULSION

Vieri experiment thermostats

The present invention discloses a calorstat for a Christian Vieri experiment, and comprises a metal bath cavity body, an electrical heater, a sample cup bracket, a bracket driving mechanism, a temperature controller which contains a platinum resistance thermometer and a thermoregulator, and a temperature measured signal deduced mechanism which contains a conductive ring and a dynamic electrode group. The present invention is characterized in that the platinum resistance thermometer is directly positioned in a sample testing area. The conductive ring is connected with the output terminal of the platinum resistance thermometer. The dynamic electrode group is connected with the temperature signal input terminal of the thermoregulator. The lower end of the dynamic electrode group keeps a good contact with the conductive ring. When the bracket driving mechanism drives the sample cup bracket to rotate, the dynamic electrode group slides on the surface of the conductive ring, and the resistance value of the platinum resistance thermometer is transmitted to the thermoregulator, so the heating current of the electrical heater is controlled, Thereby the temperature of the sample placed area can be directly controlled and displayed in real time, and the standard requirement of the Christian Vieri experiment can be satisfied. The invention has the advantages of high temperature control precision, convenient use and low cost.
Owner:XIAN MODERN CHEM RES INST

Potato nutrition recombinant rice recipe and preparation method thereof

The invention relates to the field of food deep processing, in particular to a potato nutrition recombinant rice recipe and a preparation method thereof. Through the addition of sucrose ester, sodiumalginate and yeast beta-glucan, a recombinant structure is regulated and controlled; mixed materials subjected to tempering are added into a double-screw extruding machine through a feeder; the double-screw extruding machine comprises five heating regions; the length-to-diameter ratio of a screw rod is 16:1-28:1; the work temperatures of each section of cavity of the double-screw extruding machineare shown as follows: the region I temperature is 50 to 70 DEG C; the region II temperature is 80 to 100 DEG C; the region III temperature is 120 to 140 DEG C; the region IV temperature is 110 to 120DEG C; the region V temperature is 25 to 40 DEG C; the screw rod rotating speed is 200 to 300 rpm. The materials form gel particles in the processes of conveying, extrusion and aging action processesof the double-screw extruding machine; the extrusion shaping is performed through a mold which has the round mold hole and has the diameter being 1 to 6mm; the recombinant rice is primarily obtained;through steaming and boiling pretreatment, the viscosity of the potato whole flour is reduced; the potato whole flour is in a low- gelatinization state; the recombinant rice with good resuscitation resistant performance, comprehensive nutrition and good structure can be obtained.
Owner:SHENYANG NORMAL UNIV

Method for quantified assessing three-phase imbalance treating effect

The invention discloses a method for quantified assessing three-phase imbalance treating effect. The method includes the steps of obtaining the shape factor interval value of a distribution transform outlet line, obtaining a shape factor interval value before three-phase imbalance treatment, determining the instantaneous three-phase imbalance level, determining the instantaneous average current of loads, calculating equivalence resistance of the line, calculating the electric quantity interval loss, and obtaining the really saved electric quantity by comparing with a measured loss value. Load states before and after three-phase imbalance treatment are normalized to a same load level, so that the line loss values before and after three-phase imbalance treatment can be compared to obtain the really saved electric quantity. The three-phase imbalance treating effect can be assessed in a quantified way, good technical foundation is provided for development of low carbon electric power of a power grid, and huge economic benefit can be provided to electric power enterprises.
Owner:STATE GRID GASU ELECTRIC POWER RES INST +3

Preparation method of goat mycoplasma pneumonia immune colloidal gold labeled rapid diagnosis test paper

The invention discloses a preparation method of goat mycoplasma pneumonia immune colloidal gold labeled rapid diagnosis test paper, which comprises the following steps: preparing a goat mycoplasma pneumonia specific monoclonal antibody by using goat mycoplasma pneumonia BNCC126187 strain RPS11 gene plasmid recombinant purified antigen as an immune antigen; through colloidal gold particle monoclonal antibody protein labeling, purification, quality identification and condition optimization, establishing a mycoplasma pneumonia colloidal gold immunochromatographic assay method; and combining the obtained mouse RPS11 monoclonal antibody and a colloidal gold probe on a glass fiber membrane, and assembling with a solid-phase NC membrane to obtain the gold-labeled detection test strip. The gold-labeled diagnosis and detection test strip developed by the invention has good characteristics of rapidness, sensitivity, specificity and simplicity and convenience in operation on diagnosis and detection of mycoplasma pneumonia of sheep, and lays a good technical foundation for early diagnosis and detection of mycoplasma pneumonia of sheep and development of epidemiological investigation work.
Owner:GUIZHOU INST OF ANIMAL HUSBANDRY & VETERINARY

Liquid lithium injection device applied to fusion device and provided with sealing structure

The invention discloses a liquid lithium injection device which is applied to a fusion device and is provided with a sealing structure. The device comprises a heating structure of a heat source builtin a lithium injection pipe, a vacuum sealing structure of the heat source, and the wedge sealing structure design of liquid lithium. Through the heat source built in the lithium injection pipe, the temperature and fluidity of the liquid lithium can be effectively controlled. The vacuum sealing structure of the heat source can maintain the vacuum environment of a liquid lithium injection system. The liquid lithium does not react with O2, N2, H2O and CO2 in the air. A top bellows is moved to control the wedge sealing structure of the liquid lithium, and on and off of liquid lithium injection inthe fusion device are controlled. According to the invention, the device can easily, economically and effectively realize supplement and renewal of a liquid lithium first wall material in the fusiondevice, and provides a good technical basis for the successful application of the liquid lithium first wall in a fusion reactor in the future.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI

Copper mixed bonding method

The invention relates to a copper mixed bonding method. According to the invention, a traditional rear end copper interconnection technology is used to produce flat copper and insulator planes on the surfaces of two wafers needing to be bonded, and copper patterns on two wafers are one-to-one corresponding; in a wafer mixed bonding process, wafer bonding is completed, namely wafer insulators are bonded; the bonded wafers are placed in high temperature for annealing; copper is compressed by an insulator bonding interface, wherein the thermal expansion coefficient of copper is more than the thermal expansion coefficient of an insulator; under the combined effect of temperature and pressure, copper metal on both sides are close and are compressed and fused into a whole body, so that copper conductors on both sides are integrated into a whole body; the method is applied to the processing of machines compatible with a conventional integrated circuit; metal interconnection is realized in a mixed bonding process; and metal grains of upper and lower substrates are integrally fused, which greatly reduces cross-wafer conductor resistance and delay and provides a good process foundation for subsequent steps.
Owner:WUHAN XINXIN SEMICON MFG CO LTD

Rapid preparation method of multi-scale lithium spheres

ActiveCN109773199AMeet Injection Modulation ELMsFulfil requirementsMelting tankPhysical chemistry
The invention discloses a rapid preparation method of multi-scale lithium spheres. Under protection of inert gas atmosphere, lithium raw materials are fed into a lithium melting tank through a feed inlet and heated to a certain temperature through a heater, inert gas with gas pressure adjusted to be appropriate through an inflation valve, a straight-way valve and a deflation valve is used for squeezing liquid lithium in a lithium pipe, the liquid lithium is sprayed to a cooling agent through small holes in a plug and rapidly cooled and cured to obtain lithium spheres, the gas pressure of introduced gas is adjusted so as to produce submillimeter-scale lithium spheres with different diameters, subsequent treatment is carried out, and the clean multi-scale lithium spheres are obtained. The operation is easy, the production period is short, the lithium spheres are formed regularly, the size is controllable in submillimeter scale, the requirements of EAST device lithium sphere injection forELMs modulation and plasma fracture protection experiments can be met, and a good technical basis is provided for successful application of impurity injection in a fusion reactor in the future.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI

High-performance wear-resistant anticorrosive paint, coating and preparation method

The invention discloses high-performance wear-resistant anticorrosive paint, a coating and a preparation method, and belongs to the technical field of chemical materials. The paint is formed by mixinga component A and a component B, the component A comprises wear-resistant anticorrosive resin, pigment filler, a solvent and an assistant, and the component B mainly comprises a curing agent; the paint comprises the following components in parts by mass: 21.6-51.25 parts of the wear-resistant and corrosion-resistant resin; 25-40 parts of the pigment filler; 20 to 30 parts of the solvent and 3-8 parts of the assistant; wherein the wear-resistant anticorrosive resin is epoxy resin, and the curing agent is a modified alicyclic amine curing agent. On the basis of epoxy resin and other pigments and fillers, a modified alicyclic amine curing agent with high wear resistance and high hardness and high-wear-resistance heavy-duty anticorrosive filler aluminum oxide are compounded and subjected to formula optimization to form the high-hardness high-wear-resistance heavy-duty anticorrosive paint. The paint has the characteristics of high adhesion, high wear resistance, heavy corrosion resistanceand the like, and has the characteristics of wide substrate matching range, strong adhesion, high insulativity and the like.
Owner:725TH RES INST OF CHINA SHIPBUILDING INDAL CORP

Financial big data system based on online deep learning and market operation value quantification

The invention discloses a financial big data system based on online deep learning and market operation value quantification. The system includes a person flow stay perception module, a shopping mall BIM space module, a shopping mall value super index evaluation module, a shopping mall value super index evaluation data set storage and instant training module, and a financial big data and shopping mall BIM visualization module. A subjective operation value quantized value is fitted through passenger flow data and business volume personalized data, an optimized convolutional neural network is trained in real time for processing a large amount of data sampled during operation, and real-time quantification of the operation value of a shopping mall is realized. According to the invention, fairness from objective data to subjective rating is ensured, data desensitization is realized, network training is convenient, and real-time monitoring and evaluation of managers are facilitated.
Owner:郑州智利信信息技术有限公司

American-type PRRSV N protein antigenic epitope and applications thereof

The invention discloses an American-type PRRSV N protein antigenic epitope and applications thereof, and aims to solve the technical problem of insufficient research on PRRSV N protein cell epitopes.The invention designs a short peptide, and the amino acid sequence of the short peptide is as shown in SEQ NO.1 or is an amino acid sequence which is derived from the amino acid sequence as shown in the SEQ ID NO.1 and has the same function. The American-type PRRSV N protein antigenic epitope is screened, and comprises the amino acid sequence of the short peptide. The short peptide or the American-type PRRSV N protein antigenic epitope are applied in preparing an antibody for preventing and / or treating American-type PRRSV. The invention provides a novel N-protein antigenic epitope, completes the identification of the epitope, improves the epitope map of the N protein, lays a foundation for the research of American-type PRRSV cross-protective epitope vaccines, and has great significance fordifferentiated detection on American-type PRRSV and European-type PRRSV.
Owner:ZHENGZHOU UNIV

Novel split sliding valve sleeve structure

The invention discloses a novel split sliding valve sleeve structure comprising a reducing sleeve, a valve sleeve and a valve seat, wherein the reducing sleeve is arranged in an inner hole of a main valve body; a sliding chute matched with the valve seat is arranged in an inner hole of the reducing sleeve; the reducing sleeve and the valve seat are respectively provided with correspondingly-communicated through holes; and the valve sleeve is arranged in the reducing sleeve and is provided with a notch matched with a grinding surface of the valve seat. According to the invention, by changing the traditional sliding valve sleeve with an integrated structure into a detachable split structure and changing an inner grinding surface of the traditional sliding sleeve into an outer grinding surface, the planeness of a sealing surface of the sliding valve sleeve can be improved by conveniently adopting a novel high-precision processing and grinding process, so that the grinding of the sliding valve sleeve is changed into the modern objective scientific mechanical automatic grinding from the experiential workshop manual operation, the grinding quality can be fundamentally improved and the qualitative leap of the grinding work can be realized.
Owner:MEISHAN CRRC BRAKE SCI & TECH CO LTD

A solvent-resistant composite nanofiltration membrane and preparation method thereof

The invention discloses a solvent-resistant composite nanofiltration membrane and a preparing method. The preparing method comprises the steps that firstly, polyetherimide and an organic solvent are mixed and stirred at 35-80 DEG C, then standing is carried out at 6-25 DEG C for defoaming, a membrane casting solution is obtained and spread on non-woven fabric, the non-woven fabric is put in air, soaked with deionized water and taken out, moisture on the surface is absorbed with filter paper, and a base membrane is obtained, wherein the face, with the membrane casting solution spread, of the non-woven fabric is called a face A; secondly, the face A of the base membrane is soaked in an ethylenediamine methanol solution, taken out and washed with deionized water, and a cross-linked membrane is obtained; thirdly, the face A of the cross-linked membrane is soaked in an ammonium lignosulfonate aqueous solution and taken out, then the face A is soaked in a trimesoyl chloride n-hexane solution, taken out and air-dried, and the solvent-resistant composite nanofiltration membrane is obtained. The solvent-resistant composite nanofiltration membrane and the preparing method are low in cost, the method is simple, and a reaction is quick; the obtained solvent-resistant composite nanofiltration membrane has high separation selectivity and solvent tolerance.
Owner:TIANJIN UNIV

Black water and grey water treatment apparatus through modular film method

The invention relates to a black water and grey water treatment apparatus through a modular film method. A purpose of the present invention is to solve the technical problems of substantial reduce of the product cost and the like. The technical scheme adopted by the apparatus comprises that: the apparatus is provided with a first module, a second module and a third module; the first module is provided with a first inlet and a first outlet; the second module is provided with a second inlet connected with the first outlet and a grey water inlet; the second module is further provided with a second outlet; the third module is provided with a third inlet connected with the second outlet and a third outlet; the organic matter concentrations of effluents from the first outlet of the first module, the second outlet of the second module and the third outlet of the third module are respectively maintained to preset values; the black water and grey water treatment apparatus is applicable for various categories of black water and grey water treatments in the ship engineering and the marine engineering.
Owner:704TH RES INST OF CHINA SHIPBUILDING IND CORP

Hot riveting method for TC4 titanium alloy pin

The invention relates to a hot riveting method for a TC4 titanium alloy pin. The hot riveting method is characterized by comprising the following steps: 1, a to-be-riveted plate-shaped part and a to-be-riveted pin are cleaned; 2, the plate-shaped part is installed on a riveting tool and leveled, and the riveting tool is composed of an upper electrode assembly and a lower electrode assembly; 3, the pin is clamped, the heating current, the heating time and the riveting pressure of a projection welding machine are controlled to rivet the plate-shaped part so as to guarantee the size and the appearance of the plate-shaped part and the torque requirement of 4-9 Nm between the pin and the plate-shaped part, then the plate-shaped part is taken down, wherein the riveting pressure ranges from 0.06 Mpa to 0.14 Mpa, the heating time is 0.14 s, and the heating current ranges from 4.0 KA to 4.6 KA; and optionally 4, visual inspection is conducted on the riveted plate-shaped part, and torque test is conducted on the riveted first and last test pieces.
Owner:北京力威尔航空精密机械有限公司

A kind of method for the synthesis of tedizolid phosphate by nickel catalysis

The invention discloses a nickel catalyzed tedizolid phosphate synthesis method. The method includes that methyl tetrazolium bromopyridine serving as an electrophilic reagent and N-oxazolidinone phenyl zinc halide serving as a nucleophilic reagent are subjected to nickel catalyzed Negishi coupling reaction and in-situ deprotection to obtain pharmaceutically active molecular tedizolid through a two-step one-pot process, and tedizolid is subjected to phosphoric acid esterification to obtain tedizolid phosphate. The method has advantages that 1) by in-situ synthesis and utilization of the organiczinc reagent, a complex step of metal reagent separation is avoided; 2) a cheap nickel catalyzing system is applied to establishment of a tedizolid phosphate core framework for the first time, and efficiency of nickel catalyzed Negishi coupling reaction is equivalent to that of palladium catalyzed Suzuki coupling reaction in current industrial synthesis of tedizolid phosphate. The remarkable advantages are beneficial to improvement of efficiency in tedizolid phosphate synthesis and production cost reduction, and the nickel catalyzed tedizolid phosphate synthesis method has a promising industrial application prospect.
Owner:陕西思尔生物科技有限公司 +1

A kind of bismuth-chromium composite oxide semiconductor photocatalyst and its preparation method and application

The invention discloses a bismuth-chromium composite oxide semiconductor photocatalyst, a preparation method and application thereof. The molecular formula of the photocatalyst is Cr 2 Bi 3 o 11 , the maximum absorption wavelength is 560 nanometers, the band gap is about 2.15 eV, it is a rod-shaped structure, the length is between 1 and 1.5 microns, and the diameter is about 150 nanometers. Its preparation method: disperse bismuth nitrate pentahydrate in deionized water to obtain a white suspension; dissolve sodium chromate tetrahydrate in deionized water to obtain a yellow-green transparent solution; add sodium chromate solution dropwise to In the bismuth nitrate suspension, continuously stir to obtain a yellow suspension; continuously stir the obtained suspension for 0.5 to 24 hours, and obtain a yellow precipitate after natural cooling; filter, wash, vacuum dry, and grind to obtain a yellow powder Cr 2 Bi 3 o 11 Semiconductor photocatalysts. Cr prepared by the present invention 2 Bi 3 o 11 Semiconductor photocatalysts have a very wide range of light absorption wavelengths, so they have higher light utilization efficiency and can be used in environmental protection industries such as wastewater treatment.
Owner:OCEAN UNIV OF CHINA

Agrobacterium tumefaciens-mediated sesame cotyledon transgenic method

The invention belongs to the technical field of genetic engineering operation, and particularly relates to an agrobacterium tumefaciens-mediated sesame cotyledon transgenic method. The method comprises the following steps: obtaining an explant, preparing an infection solution, performing infection co-culture, performing tissue culture, performing resistance screening, inducing rooting, transplanting and the like. On the basis of a common method for transgenosis by infecting the cotyledons with agrobacterium tumefaciens, the invention provides a sesame cotyledon-based transgenosis genetic transformation method which is short in transformation period and high in transformation rate in combination with the construction of a sesame tissue culture regeneration system. Preliminary experiment results prove that related plant additives are necessary conditions for realizing healthy growth and rooting of sesame regenerated plants, and a large number of sesame transgenic plants can be successfully obtained through optimal combination of related culture medium components and culture conditions. Based on the genetic transformation system, a good technical foundation can be laid for subsequent researches such as sesame important gene function verification, transgenic mutant library construction, excellent germplasm creation and the like.
Owner:HENAN SESAME RES CENT HENAN ACADEMY OF AGRI SCI

Ultrahigh-speed revolving cup assembly directly driven by iron-loss-free permanent magnet brushless motor

The invention discloses an ultrahigh-speed revolving cup assembly directly driven by an iron-loss-free permanent magnet brushless motor, which comprises a fixed sleeve, a rotating part, a permanent magnet suspension bearing part and a motor, and is characterized in that the rotating part comprises a shaft rod and a revolving cup head; the permanent magnet suspension bearing part comprises a radialbearing, the radial bearing comprises an inner permanent magnet ring and an outer permanent magnet ring which are coaxially arranged, the outer permanent magnet ring is fixedly installed on the innerwall of the fixing sleeve, radial magnetization is adopted for the inner permanent magnet ring and the outer permanent magnet ring, and the polarity of the outer wall of the inner permanent magnet ring is the same as that of the inner wall of the outer permanent magnet ring; the motor comprises an armature assembly and a rotor assembly, the armature assembly is fixedly installed on the fixing sleeve, and the rotor assembly is fixedly connected with the shaft rod. A compact permanent magnet suspension bearing structure is adopted, so that a rotating component has smaller rotational inertia under the condition of the same mass, the radial centrifugal force of a rotor component is smaller, and the use amount of permanent magnets in the permanent magnet suspension bearing is reduced.
Owner:武汉万至达智能科技有限公司 +1

AFP (Alpha-Fetoprotein) testing kit (time-resolved fluoroimmunoassay) for prenatal screening and preparation method thereof

The invention relates to an alpha-fetoprotein testing kit (time-resolved fluoroimmunoassay) applicable for mid-pregnancy prenatal screening and a preparation method thereof. The kit comprises the following main components of an experimental buffer solution, a concentrated washing solution, an enhancement solution, a reaction plate, a standard product and a quality control product of filter paper dried blood spots and a europium marker. The method for preparing the kit according to the invention comprises the following steps of: 1. preparing the experimental buffer solution, the concentrated washing solution and the enhancement solution; 2. coating the reaction plate; 3. preparing the standard product and the quality control product; 4. preparing the europium marker; 5. separately loading; 6. sticking labels; and 7. assembling into a finished product. The invention has the characteristics that the accuracy and the sensitivity of a detected result are high, the stability is good, and a detecting method is economical, convenient and safe and has no traumatic property, has high automation degree, and the like. A filter paper dried blood spot technology is applied to prenatal screening work, which is beneficial to blood specimen collection, storage and transportation and ensures the experimental reliability.
Owner:GUANGZHOU FENGHUA BIOENG

A kind of method for preparing carbon-nitrogen airgel material based on alkali-thermal method

ActiveCN110975771BMore exposurePromotes the rate of chemical reactions on the surfaceAerogel preparationColloidal chemistry detailsChemical reactionPhysical chemistry
The invention relates to a method for preparing a carbon-nitrogen airgel material based on an alkali-thermal method, and belongs to the technical field of nanometer materials. The method of the present invention prepares a carbon-nitrogen airgel material with a three-dimensional network structure through a simple alkali-thermal clipping and self-assembly process, and the preparation method is simple to operate, easy to repeat, and does not use additional support materials, providing a good solution for commercial applications. Technical basis and material guarantee. The carbon-nitrogen airgel material with a loose cotton-like structure prepared by the method of the present invention has a three-dimensional network structure and an open pore structure compared with the general bulk carbon nitride, and can expose more reaction sites, providing fast The mass transfer channel, and then the adsorption of pollutants or the promotion of the surface chemical reaction rate make the application prospect of the present invention in the fields of photocatalysis, electrocatalysis and pollutant adsorption very broad.
Owner:CHINA ACADEMY OF SPACE TECHNOLOGY

A method for controlling a permanent magnet brushless DC motor driver

The invention discloses a permanent magnet brushless DC motor driver control method. The method is used for control of a motor drive servo control system. The system has relatively good control accuracy and dynamic response performance. The method comprises the steps of firstly reading values of three commutation HALLs through software to obtain an actual position of a rotor when a motor is started, detecting an angular position omega<ref> of the rotor through a rotor position sensor after starting, and simultaneously calculating a speed n of the rotor; detecting a stator current FOC control algorithm to obtain detection values i<d> and i<q>; outputting AC / DC shaft voltage values u<d> and u<q> through a PI adjuster separately, generating voltage values u<alpha> and u<beta> after coordinate transformation to obtain an SVPWM drive signal; and finally outputting sixth paths of control pulse signals and driving six MOSs to drive the motor. The permanent magnet brushless DC motor driver control method is suitable for control of an intelligent obstacle avoidance robot and is achieved by adopting a DSP processor; the control process is achieved through a vector control strategy of which direct axis current is zero; the contradiction between overshoot and the rapidity is solved; the anti-jamming capability of the system is improved; and the high-performance requirement is met.
Owner:STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +3

Method for representing, storing and querying resource big data

The invention relates to a method for representing, storing and querying resource big data. The method comprises the following steps: constructing a ground target model, a resource capability model and a joint search model, and dividing a space region where a ground target is located to obtain a series of subspaces; representing ground targets in the spatial region by adopting a ground target model to obtain a ground target set, extracting target description information of each ground target in the ground target set to obtain keyword information, and obtaining an entry set; and constructing a target resource combination according to the corresponding relationship between the ground target and the series of subspaces and the corresponding relationship between the ground target and the resources. By adopting the method, the resource big data can be accurately represented.
Owner:NAT UNIV OF DEFENSE TECH

A method, device and system for providing extended services based on instant messaging

The invention discloses a business expansion providing method based on instant message and a device and a system for realizing the same. The business expansion providing method comprises steps of recording and storing related information of an business expansion application which is successfully authenticated, performing registration on the network side according to the related information of the business expansion application, and transmitting the SIP information transmitted by the network side to the corresponding expansion business application for processing when the fact that the SIP information transmitted from the network side carries the information matching with the related information of the recorded expansion business application is determined. The invention also discloses a device and a system for realizing the method.
Owner:CHINA MOBILE COMM GRP CO LTD

Preparation method and application of MNO2 catalyst for deep mineralization of phenol wastewater at room temperature

The invention relates to a preparation method of a MnO2 catalyst for further mineralizing phenolic waste water at normal temperature, which belongs to the technical field of thermal catalytic materials. The preparation method comprises the following steps: firstly mixing potassium permanganate and reducing adjuvant to obtain turbid liquid, reacting for 10 to 15 hours at the temperature of 180 to 250 DEG C, naturally cooling, thus obtaining the MnO2 catalyst with further mineralization capacity. The MnO2 catalyst prepared by the method of the invention has excellent activity for further mineralizing the phenolic waste water; and moreover, the preparation method provided by the invention is cheap in raw materials and simple, thereby effectively decreasing the product cost, having great environmental protection value, and having high practical value and application prospect.
Owner:TSINGHUA UNIV
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