53results about How to "Meet study" patented technology

The invention provides a method for determination of a concentration of mineral oil mist in workshop air. The method comprises the following steps of collecting an oil mist sample form air by an ultrafine glass fiber membrane, carrying out extraction by 10mL of CCl4, directly carrying out detection by an infrared spectrophotometer by scanning in a range of 2700 to 3200cm<-1> to obtain the maximum absorption peak as a sample measurement wave number, and subtracting the absorbance at the wavelength of 3200cm<-1> from the absorbance of the maximum absorption peak to quantify a concentration of mineral oil mist in the oil mist sample. The method is accurate and fast, produces a small interference, has high sensitivity, precision less than 10%, accuracy less than 10% and a detection limit of 2.0 microgrammes per milliliter, and satisfies detection and research requirements. The method provided by the invention fills in the blank of infrared spectrophotometry-based determination of mineral oil mist in workshop air.

The invention relates to a detection method for gamma-aminobutyric acid (GABA) content in food by using high performance liquid chromatography (HPLC) method. The method is characterized by: carrying out sufficient whirling through double distilled water, and an ultrasonic extraction for a sample requiring detection, then carrying out a centrifugating to obtain supernatant, followed by filtering the supernatant to obtain the sample liquid; weighing the GABA standard substance, then dissolving the GABA through the double distilled water, and carrying out a metered volume for the GABA solution to adopt the solution as a standard stock solution, further dissolving the standard stock solution through the double distilled water to obtain a standard working solution having a concentration gradient; adopting o-phthalaldehyde and 2-mercaptoethanol as derivating agents, and carrying out a derivation for the sample liquid through a HPLC equiped with a online derivation apparatus, followed by carrying out a quantitative detection through a external standard method. The method for detecting the GABA content in the food is quick and effective, and has a linearity range of 0.5-1000 mg / L, a recovery rate more than 88.2%, a relatibe standard deviation (RSD) less than 5%. In addition, with the present invention, a reliable and convenient method is provided for detecting the GABA content in the food,; requirements of researches and productions are met.

The invention relates to a method for determining content of hexabromocyclododecane in electronic material by gas chromatography-mass spectrometry. The method comprises the following steps of: adding n-hexane and acetone with a ratio of 1:(0.5-2) in a sample to be detected, refluxing at 60 to 90 DEG C for 2 to 16 h to extract hexabromocyclododecane, filtering, and purifying to obtain the sample; weighting hexabromocyclododecane standard substance, dissolving with methanol, adding distilled water to fixed volume to obtain a stock solution, and further diluting with methanol to obtain standard solutions with concentration gradient; detecting the sample processed solution by gas chromatography-mass spectrometry; and calculating the result. The inventive method for determining content of hexabromocyclododecane in electronic material has high speed, high efficiency and less error rate not larger than 10%. Accordingly, the invention provides a reliable and easily-implemented method for determining hexabromocyclododecane in electronic material and can meet the requirement of study and production.

The invention relates to a method for detecting organic matters in soil through a potassium dichromate oxidation process, which comprises the steps of weighing a test sample, adding 5mL of 0.9 to 1.1mol / L of potassium dichromate standard solution and 5mL of concentrated sulfuric acid, and heating the test sample in a boiling water bath for 35 to 40 min; completely absorbing the cooled mixture into a conical flask with 250mL, adding a phenanthroline hydrate indicator, and using a ferrous sulfate solution to titrate to an end point. The method for detecting the organic matters in the soil through the potassium dichromate oxidation process optimizes the concentration of the potassium dichromate standard solution and the influence of the heating temperature and time on a detection result. The method provided by the invention is adopted to detect the content of the organic matters in the soil accurately and reliably, and the relative mean variation is less than 10%. Thus, according to the method provided by the invention for detecting the contents of the organic maters in the soil, a method which is reliable and convenient to realize is provided to meet the requirements in research and production.

An all-digital comprehensive simulation platform of a power station achieves graphical modeling of a power station power grid part, a flow net system and a control system. The established simulation models can perform independent simulation calculation of subsystems or devices or the like, united closed-loop computation of all system models of the whole power station, all-digital real-time simulation and simulation analysis experiments. The platform comprises a simulator module, real-time calculated data can be automatically linked with simulator virtual power station monitoring images or equipment variations in virtual equipment or physical subsystems, and then functions of the real-time digital simulator can be achieved. The platform directly calls the simulation models in analysis and computation, and conveniently meets simulation demands of a power station transient process, a middle-and-long term process, a flow network, the control system and the like.

The invention relates to a method for measuring the contents of Polyoxyethylene nonyl phenyl ether that is hazardous substances in electronic and electrical products and textiles through a gas chromatograph-mass spectrometer. Methanol, toluene or methylene dichloride are added in sample to be measured; the mixture is processed through reversed flow for 4 to 16 hours at the temperature ranging from 60 to 120 DEG C, and then Polyoxyethylene nonyl phenyl ether is extracted; then a sample solution is obtained after filtration and purification; proper standard-products of Polyoxyethylene nonyl phenyl ether are weighed accurately and are used as a stock standard solution after being dissolved by methanol and processed through constant volume, and then are further diluted into a working specification curve solution with concentration gradient by using methanol; the sample solution is analyzed by utilizing the gas chromatograph-mass spectrometer; and a sample result that is calculated by a specification solution curve is obtained. The method is adopted to measure the contents of Polyoxyethylene nonyl phenyl ether in the electronic and electrical products and the textiles, the accuracy and the availability are achieved, and both the precision and the accuracy are less than 10 percent. Therefore, the invention provides a reliable and feasible method for the detection on Polyoxyethylene nonyl phenyl ether in the electronic and electrical products and the textiles, and can satisfy the requirements of research and production.

The invention discloses a method for generating and cultivating papuan jellyfish ephyrae and belongs to the field of artificial feeding and breeding of ornamental marine animals. A papuan jellyfish hydranth transversely cracks to generate an ephyra every time, the ephyra is continuously cultivated for 5 to 10 days, and second-time single-ephyra transverse cracking is generated; the ephyra which just cracks is bred in a container where bubbles drive water flow, one to three artemia nauplii are fed with each milliliter of water every day, and the water is changed after the artemia nauplii are fed for 2h. Cultivation conditions are as follows: the water temperature is 20 to 27 DEG C, 8000Lux 8h illumination 16h dark alternation is carried out, 5 to 10d ephyrae are transformed into jellyfish bred bodies and the jellyfish bred bodies are moved into a circulation cylinder where a water pump drives the water flow. According to the method, transverse cracking of the papuan jellyfish hydranth is promoted in an artificial environment, the ephyrae are generated and are further cultivated to obtain the jellyfish bred bodies and adults, and the situation that exhibition in an aquarium is maintained by virtue of fishing is solved.

The invention relates a method for detecting the content of fluoride in environment by chromatography of ions, comprising the following steps: weighing appropriate amount of sample into a conical flask, shaking and extracting the sample at the ratio of solid to liquid being 1:5 for 30min, filtering and removing organic matters and heavy metal ions by a method of a pre-processing column. The peak area of sample liquid to be measured of the sample is measured under the optimal chromatographic condition, and the concentration of liquid to be measured is read from a standard curve. The method for detecting the content of the fluoride in the environment is rapid and effective, and the relative average deviation is less than 10.0 percent. Therefore, the method for detecting the content of the fluoride in soil is more reliable and is easy to implement, which can meet the requirements of research and production.

The invention belongs to propagation expanding protection technologies of plant resources, and particularly relates to a method for quickly breeding rare specific tea germplasm. The method for quickly breeding the rare specific tea germplasm comprises the following steps of 1, scion collection and freshness retaining; 2, grafting and management; 3, management after grafting; 4, scion maintenance, collection and freshness retaining; 5, cuttage; 6, management after cuttage. Grafted new branches are directly taken as cuttage scions, the features of quick growth of grafting are utilized for propagation expanding of the cuttage scions, and the number of seedlings formed through cuttage seedling raising is guaranteed.

The invention relates to an energy equivalence modeling method for a modularization multi-level converter. The method comprises the steps that a modularization multi-level converter bridge arm and submodule electrical independent model is established; in the submodule equivalence process, submodule switch device conducting voltage drop and submodule capacitor voltage are classified, the calculation process is simplified, the energy conservation principle is used for updating and calculating the submodule capacitor voltage, and internal characteristics of the converter are guaranteed; a modularization multi-level converter bridge arm is subjected to integral equivalence by a controlled voltage source, and accurate output characteristics of the converter are guaranteed. According to the energy equivalence modeling method, MMC modeling can be efficiently and precisely achieved in electromagnetic transient simulation, and the calculation complexity of electromagnetic transient simulation of the method is greatly lowered; the method provides a great reference function for MMC researchers, and convenience is provided for successfully developing following simulation analysis work of a system.

Disclosed is a separating method for collagen antifreeze peptide. The separating method mainly comprises three steps of collagen preparing, collagen enzymolysis compound preparing and collagen antifreeze peptide separating, and finally the collagen antifreeze peptide with high antifreeze activity is obtained. The amino acid complete sequence of the collagen antifreeze peptide is Leu-Gly-Lue-Gly-Pro-Leu-Gly-Arg-Gly-Pro-Leu-Leu. According to the separating method, the separating process is simple, cost is low, and scale production is easy to achieve.

The invention relates to a method for determining content of red phosphorus in an electronic product by a gravimetric method. The method comprises the following steps: crushing and evenly mixing a sample to be determined, and then adding concentrated alkali liquor to the sample to react with the sample to generate hydrogen phosphide. The gravimetric method is used for determining as follows: the hydrogen phosphide is absorbed by 50mL of 5% aqueous silver nitrate solution; when the reaction is completed, the obtained mixture is pre-baked to a constant-weight No.4 glass colander at 105 DEG C plus or minus 2 DEG C for filtration, and then the mixture is weighed, thus the red phosphorus content can be calculated. The method for detecting the content of the red phosphorus in the electronic product is rapid and effective, and the relative average deviation is less than 10%; therefore, the method for detecting the content of the red phosphorus in the electronic product is reliable and convenient, and can meet the research and production needs.

The invention relates to a simple and convenient testing method for phenylamine in soil. The simple and convenient testing method for phenylamine in soil mainly comprises the steps of extracting, blowing, capturing and testing phenylamine in soil at two steps with acid and alkali. The method for extracting, blowing, capturing and testing trace phenylamine in soil at two steps with acid and alkali is simple, convenient, rapid, small in interference, accurate, reliable and low in detection limit, and the detection operation and study requirements of people can be met. By adopting the simple and convenient testing method, the blank of the method for extracting, blowing, capturing and testing trace phenylamine in soil at two steps with acid and alkali is made up.

The invention discloses a device for measuring the hydration heat radiation velocity and the hydration period of cement and a use method of the device. The device comprises a heat-preservation cabin and a heat-preservation cabin cover, wherein a sample cabin is arranged inside the heat-preservation cabin; an electromagnetic stirring device and a sample tank are arranged inside the sample cabin; the electromagnetic stirring device is positioned at the bottom end of the sample cabin; the sample tank is arranged on the electromagnetic stirring device; the sample tank is opened and can be conveniently sealed by using a sealing cover; a temperature sensor and an electric conductivity sensor are arranged on the sealing cover in a penetrating manner; a stirring rotor is arranged inside the sampletank; a computer is connected with the temperature sensor and the electric conductivity sensor through data wires. When the device is used, a sample is placed in the sample tank, the device is mounted, the electromagnetic stirring device is powered on, and temperature and electric conductivity variation curves are recorded by using the computer when a cement concrete slurry structure is formed. The device is capable of continuously, automatically and in-situ monitoring the whole structure formation process once water is added, and in addition, the experiment equipment is convenient to carry over and low in cost.

The invention discloses a rapid instrument analysis method for the residual quantity of hydroxylamine in a reaction solution. The method comprises the following steps: 1, carrying out a derivatizationreaction on the hydroxylamine-containing reaction solution and benzaldehyde to generate benzaldoxime; and 2, determining the content of the benzaldoxime in the above obtained derivatization solutionof the reaction solution through high performance liquid chromatography, and calculating the content of the hydroxylamine in the original reaction solution according to the content of the benzaldoxime. The analysis and detection method provided by the invention has the advantages of simplicity in operation, high accuracy, strong specificity, high sensitivity, fast analysis speed and high efficiency. Compared with the prior art, the method allows determination using a high performance liquid chromatograph to be carried out after the derivatization reaction, and realize accurate qualitative andquantitative determination in order to meet needs in researches and production.

The invention discloses a computer controlled experiment system with the cloud controller programming function. The computer controlled experiment system is composed of a cloud server terminal, a user terminal, a monitoring terminal, and an actually controlled system. The cloud server terminal is equipped with a control algorithm library, a database, a model identification library, an optimized algorithm library and a server management module. The user terminal is provided with a parameter setting module, a user terminal communication module, a control algorithm uploading module and a data display module. The monitoring terminal is provided with a user information management and monitoring module and a monitoring terminal communication module. The actually controlled system is equipped with an execution module, a detection module, a communication module and a controlled object. Therefore, a cloud control experiment is carried out by the user based on a computer network; and the teacher is capable of monitoring the experiment process of the user in real time. More importantly, the control algorithm, the identification algorithm and the optimization algorithm are put into the cloud unit; and operations of all complicated algorithms are realized rapidly based on advantages of cloud computing, so that the hardware device requirement is reduced and the cost is lowered.

The invention discloses a method for manufacturing a corrugated cardboard sculpture, which comprises the following steps: design: drawing the appearance and structure drafts of the sculpture; material selection: selecting abandoned corrugated cardboards for backing cases or finished corrugated cardboard products; blanking: cutting the corrugated cardboards into required shapes; tacking: combiningthe corrugated cardboards in an overlying mode, tacking the inner parts of the corrugated cardboards by flax threads and nailing bamboo nails into the corrugated cardboards; coating: coating a mixture of talcum powder and acetic acid resins on the surface of the sculpture; sheltering: carrying out sheltering on the surface of the sculpture according to the color distribution situations; and coloring: carrying out spray-paint coloring on all color parts, then over-coating the whole sculpture by using varnishes. The method disclosed by the invention has the beneficial effects that because the corrugated cardboard is a recognized green environmental protection material, in the method, the waste corrugated cardboard is reused, therefore, the method has environmental protection value: a uniquetextural effect and a subtle light change can be formed on the manufactured sculpture, therefore, the sculpture is clear in color, can satisfy the artistic ideal of people on the interior public space of the modern building, and has artistic value; the method is simple and reasonable, and low in cost, and can be formed directly by using a dry method without using a frame, therefore, the method isbeneficial for promotion and application and has economic value.

The invention relates to a method for determining inorganic cobalt in biological chemicals, food and feedstuff through an inductively coupled plasma atomic emission spectrometer. 2 percent of a hydrochloric acid water solution and 12 percent of the hydrochloric acid water solution are added into samples to be tested; the inorganic cobalt is extracted in a form of chloride under dilute hydrochloric acid conditions after water bath and oscillation leaching; and then the inductively coupled plasma atomic emission spectrometer is used for determining a sample treatment liquid. The detection of the content of the inorganic cobalt in the biological chemicals, the food and the feedstuff by the method is quick and effective, and the relative average deviation is less than 5 percent; therefore, the method provides a reliable method with reliable and convenient implementation for detecting the content of the inorganic cobalt in the biological chemicals, the food and the feedstuff, and can meet the requirement in the research and production.

The invention relates to a method for measuring the content of red phosphorus in electronic products by photometry. The method comprises the following steps: after test sample to be measured is crushed and mixed, strong alkaline liquor is added and has reaction to generate phosphine; after acid chameleon solution is used for absorption, the absorption liquid is transferred into a comparator with a stopper; after saturated sodium sulfite solution is dropped till the color of the chameleon is completely faded, sulphuric acid solution and ammonium molybdate solution are added and evenly mixed; a drop of stannous chloride solution is added in constant volume; the mixture is disposed in a water bath with the temperature of 50 DEG. C to heat for 10 minutes; and the mixture is taken out and cooled to room temperature. The absorbency is measured at the wavelength of 680nm, the concentration value of phosphine is read out on a specification curve, and then the content of red phosphorus in samples is calculated. The application of the method in the invention determines the content of red phosphorus in electronic products, which is quick and efficient; the relative average deviation is less than 10%; consequently, the method in the invention provides a reliable and convenient method for measuring the content of red phosphorus in electronic products, thereby being capable of meeting the requirements of research and production.

The invention relates to a method for determining the 2,4,6-tribromophenol content of sea water and fresh water, which comprises the following steps: extracting a sample with normal hexane under an acidic condition (pH is less than 2), drying a resulting extract and concentrating the resulting extract, derivatizing the resulting concentrate with aceticanhydride in an alkaline environment (pH is between 10.5 and 11.5), and analyzing the resulting derivative by using an ECD detector; weighting a standard 2,4,6-tribromophenol, dissolving the standard 2,4,6-tribromophenol in solution of normal hexane, adjusting the volume of the solution, using the solution as stock solution, and adding 4,4- dibromooctafluorobiphenyl (internal standard) into the stock solution; diluting the standard stock solution with 2,4-dichlorobenzoic acid (substitute) to obtain a standard solution for use with concentration gradient; derivatizing the standard solution for use with aceticanhydride, and testing the sample by using a gas chromatograph ECD detector; and finally, obtaining a result through calculation. The method for detecting the 2,4,6-tribromophenol content of sea water and fresh water has the advantages of high speed, effectiveness, detection limit of 0.01 ug / L and error rate no more than 10 percent. Therefore, the method is a reliable and easy-to-implement method for detecting the 2,4,6-tribromophenol content of sea water and fresh water and can satisfy demands of searches and production.

The invention discloses a high effective agro bacterium genetic conversion method of a heavy metal over enrichment plant Indian leaf mustard, which comprises the following steps: culturing the disinfected mature seed of Indian leaf mustard until a pair of cotyledons expand; inoculating seedling hypocotyls, cotyledon stem or cotyledon in the culture medium and culturing; co-culturing the disseminated agro bacterium in the co-culture medium; transferring to the front culture medium until callus expands; getting the resistant callus by transferring to the screening culture medium; differentiating the resistant overgrow bud; culturing the overgrow bud in the basic culture medium; proceeding with the water and growing-root culture by transferring to HeGELanTe culture liquid; planting by transferring the strong sprout with the root to the nursery base material; getting the transferred gene Indian leaf mustard mature plant. The method can remove the influence of the external condition, which is fit for four seasons, saves the nursery sock growing field, reduces the cost, acquires a great deal of strong transferred gene seedlings in the short time, and meets the research and the production application of molecular biology.

The invention relates to a passive sampling device for atmospheric organic pollutant and belongs to the field of atmosphere environment monitoring. The passive sampling device for the atmospheric organic pollutant is aimed to provide a passive sampler featured with fast sampling speed rate, and easiness and convenience in sample processing. According to the technical scheme, the sampling device comprises a sampling material holding bracket, a semi-permeable membrane and sampling material; the sampling material holding bracket is a hollow column body, and a connecting device is arranged at each lateral surface of the hollow column body to form an interlayer between the two lateral surfaces of the hollow column body; the semi-permeable membrane is placed in the interlayer of the sampling material holding bracket; the sampling material is placed in the semi-permeable membrane, and a semi-permeable membrane is arranged between the sampling material and the sampling material holding bracket.

The invention relates to the field of accident information processing, and particularly discloses a road traffic accident information processing system and method. The system comprises: a data acquisition module which is used for acquiring traffic accident scene investigation image information, accident occurrence position information and casualty personnel information; a data management module which is used for filling in a structured form according to the traffic accident scene investigation image information, the accident occurrence position information and the casualty information and user-defined specification requirements to form traffic accident data; a processing module which is used for performing accident reconstruction on the traffic accident data, drawing an accident scene sketch, extracting related information to generate a standard data format, and finally generating an accident scene file through scene analysis and conversion; and a data output module which is used for transmitting the accident scene file obtained by the processing module and the traffic accident data formed by the data acquisition module to a database for storage. Compared with the prior art, the method has the advantages of high operability and high conversion efficiency.

The invention relates to a method for testing glycidol in air and waste gas. According to the method, the glycidol in the air and the waste gas is tested through solvent desorption-gas phase chromatography; a low-toxicity strong-base alcoholic solution is used as desorption solvents for sample processing, and green and environment-friendly effects are achieved; an analysis method is simple, convenient and fast; the quantitation result is accurate; the recovery rate is high; the detection limit reaches 0.04mg / m<3>. The method fills the technical blank of the glycidol in the air and the waste gas, and the basis can be provided for the profession health and environment protection.

The invention provides moisture-absorption polyacrylonitrile fibers, and belongs to the technical field of chemical fibers. The moisture-absorption polyacrylonitrile fibers are obtained by the following steps: hydrolyzing the polyacrylonitrile fibers by using a mixed solution containing a NaOH solution and an alkaline amino acid solution, neutralizing until the pH value is 6-7 after cooling, and then adding a crosslinking agent solution for crosslinking and cleaning, wherein the moisture regain of the prepared polyacrylonitrile fibers is greater than or equal to 3.64%, and is higher than 375.26% of that of non-hydrophilic modified acrylic fibers. According to the preparation method disclosed by the invention, the carboxyl group in basic amino acid can be connected with acrylic fibers and Al3 + together in a subsequent crosslinking process, the main chain amino group and the side chain basic group of the basic amino acid are kept, the water solubility and the electropositivity of the acrylic fibers are improved, the acrylic fibers are endowed with certain antibacterial activity and lasting property, the color, the shape and the mechanical property of the polyacrylonitrile fibers canbe well kept, and the prepared polyacrylonitrile fibers have lasting antibacterial property, good morphology and mechanical property.

The invention relates to an experimental facility for preparing fibrid, and belongs to the technical field of productions of high polymer materials. The facility comprises a seriflux storage tank, a seriflux transportation pump, a precipitation liquid storage tank, a precipitation liquid transportation pump, a precipitation machine and the like. The experimental facility for preparing the fibrid is low in investment cost, can continuously prepare fibrid hand samples of various kinds, and can flexibly adjust ratio between the seriflux and the precipitation liquid and the rotate speed of the precipitation machine, therefore the experimental facility is very applicable to research and development of the fibrid in an underbush period.

The invention discloses an ultra-large-breadth continuous-size rock mass structural plane shear strength test system. A tangential combined loading mechanism and a sample reset device are located on the two sides of a frame, and the loading position of the tangential combined loading mechanism is an upper sample close to a fracture surface; any lower sample with different breadths is fixed right above the transport trolley before testing, the left side of the sample is uniformly located at a set position close to the tangential combined loading mechanism, and the sample reset device resets inthree modes according to the breadth size of the sample. The normal combined loading mechanism is mounted on a frame cross beam, a normal loading position can be set in the tangential loading direction, and a corresponding number of normal and tangential actuators are automatically selected according to the load requirement and breadth of the upper test sample for combined cooperative loading; andthe lifting mechanism is installed on the upper portion of the cross beam and can move in the tangential loading direction so as to achieve lifting and installation of the thin upper sample or the auxiliary device. The device effectively meets the requirement for same-precision shear strength size effect research under large-range loads and is good in reliability.

The invention discloses an intelligent detection and analysis device for surface smoothness of a pavement structure. The intelligent detection and analysis device comprises a vehicle frame, a power supply storage system and a traveling driving system; the power supply storage system and the traveling driving system are installed at the rear of the vehicle frame, and a detection part, a single-chipcomputer control system and a wireless communication module are installed on the upper part of the vehicle frame; the single-chip computer control system realizes wireless communication with the power supply and storage system, the driving drive system and the detection part through the wireless communication module, and a reserved intelligent computing equipment carrying area is further arrangedon the vehicle frame. The intelligent detection and analysis device has the beneficial effects of simple and practical structure, easy disassembly and assembly, easy and convenient operation, high processing efficiency and accurate positioning, and the detection and evaluation of surface smoothness can be quickly completed.

A steam turbine wet steam measurement image probe is characterized in that the probe includes: a probe rod, a CCD or CMOS camera, a telecentric lens, an illumination source, a glass window and a computer, and the front end of the CCD or CMOS camera and the telecentric The lenses are connected together and installed in the probe rod. There is a glass window in front of the telecentric lens to prevent water droplets from washing into the telecentric lens. The output end of the CCD or CMOS camera is connected to the computer through the signal cable, and the data is processed and saved by the computer. When taking water droplet images, the strong light emitted by the illumination source hits the measured water droplet, and the image of the measured water droplet passes through the glass window and is received by the telecentric lens before being captured by a CCD or CMOS camera. The beneficial effect of the invention is that the characteristics of the telecentric lens and the CCD or CMOS digital camera are used to realize the measurement of the parameters of the wet steam two-phase flow in the steam turbine, the secondary water droplets and the water film of the blade, and meet the needs of the wet steam research and the prevention of water erosion in the steam turbine.