50results about How to "Good data reproducibility" patented technology

The invention provides a double-column rotary corrosive-wear testing machine, comprising a testing stand, which is provided with two columns, wherein a crossbeam is arranged on the columns and a through hole is formed in the center of the crossbeam; a crossbeam elevating and driving mechanism, which is arranged on the test stand and connected with the crossbeam; a testing drum, which is arranged on the center of the test stand, wherein an annular temperature control/cooling pipeline is arranged in the lower part of the testing drum; a transmission shaft, which passes through and is arranged in the through hole in the crossbeam; a sample clamping disc, which is fixed at the lower end of the transmission shaft, wherein the upper end surface of the sample clamping disc is provided with an annular groove, and the outer sides of the annular groove are provided with installation through holes; working electrodes, i.e., to-be-tested samples, which are inserted into the installation through holes; an auxiliary electrode, i.e., an annular platinum wire, which is arranged in the annular groove of the sample clamping disc; reference electrodes, which are uniformly distributed on the sample clamping disc at positions corresponding to the working electrodes; and a dynamic connection pool, which comprises annular dovetail cups, wherein the annular dovetail cups sleeve the upper part of the transmission shaft, leading-out circular rings are arranged at the bottom of the inner sides of the annular dovetail cups, the outer sides of the leading-out circular rings are provided with wiring copper columns penetrating the bottoms of the cups, the interior of each annular dovetail cup is provided with an electric needle, the lower ends of the electric needles are certain distance away from the leading-out circular rings, and the working electrodes, the auxiliary electrode and the reference electrodes are connected with the dynamic connection pool through leads.

The column type helical spring is made from Inconal X-750 (GH4145) alloy wire. The procedures for manufacturing the spring are as following: wrapping the semi-finished product of long coil of spring:cutting the long coil to single springs; washing the springs; carrying out the solid solution heat treatment; cutting end and adjusting the pitch, and carrying out the aging heat treatment. With the tests of rigidity and permangnet deformation in high temperature being completed, the finished springs are obtained. The device for testing rigidity of the spring includes the worktable, the electric stove and dial gauge etc. Testing indicates the performances of the spring: when the working temperature at 550 degree.C, the service life > or =25000 hr. The spring is easy to be assembled in the vapor lock.

The invention discloses a measurement method and device of heat conductivity coefficients. The method comprises the following steps that 1, time difference needed by a group of standard samples with known heat conductivity coefficients to reach predetermined temperature difference in a heating process is measured, and according to the relationship between the measured time difference of the standard samples and the corresponding heat conductivity coefficients, a time difference-heat conductivity coefficient standard curve is built; 2, time difference needed by a sample to be measured to reachthe predetermined temperature difference in a heating process is measured, and according to the time difference-heat conductivity coefficient standard curve, the heat conductivity coefficient of the sample to be measured is converted. The structures of the standard samples and the sample to be measured are the same; the heating mode for measuring the time difference needed by the standard samplesand the sample to be measured to reach the predetermined temperature difference comprises the steps that one end of each standard sample or the sample to be measured is heated through a heat resource,and the temperature change of the other end of the standard sample or the sample to be measured is measured. By means of the method, the heat conductivity coefficients of material and a product can be fast measured at low costs.

The invention belongs to the technical field of energy exploitation, particularly relates to a gas-based trace chemistry tracer, and further relates to a method for using the gas-based trace chemistrytracer to measure the gas production contribution amount of various sections of a gas well. The gas-based trace chemistry tracer is a fluorocarbon of which the solubility in water is smaller than 0.001 g at the temperature of 50-150 DEG C, and is particularly perfluor alkane, perfluorocycloalkane, perfluor aromatic hydrocarbon, perfluoroalkyl acid or perfluoroalkyl group ethylene vinyl acetate. The gas-based trace chemistry tracer is radiationless and poisonless; the tracer does not react with other elements, and the biological stability and the chemical stability are high; the dosage is small and is 1/1,000,000 or below; the maximal borne temperature is 360 DEG C, and the maximal borne pressure is 25 Kpsi; the tracer is only dissolved in specific oil gas, and is not dissolved in any medium of stratums and shafts; a gas chromatograph is adopted for concentration detection, the speed is high, the sensitivity is high, the data reproducibility is good, and the accuracy is high.

The invention relates to a standard sample for analyzing 82B wire rod sorbite content and a preparation method of the standard sample. The preparation method comprises the following steps: 1) ironmaking-refining in a converter-refining outside the furnace-adjusting chemical elements-continuously casting to obtain a blank, wherein the weight percentage of the chemical element is ensured to be within the range of the weight percentage of the elements in the standard sample during smelting; 2) heating casting blank, roughly rolling though a high-speed wire mill, intermediately rolling finely rolling, spinning and cooling under control of a Stelmor air cooling line; 3) sampling; and 4) cutting the base material of the standard sample into a plurality of small sections with length of 5 to 10mm; embedding into a metallographic specimen through embedding materials such as bakelite powder; carrying out polishing etching; and measuring the sorbite content; and then valuing; and finally packaging to obtain the standard sample. Such standard sample can be effectively applied to calibrating a quantitative measuring condition of the wire rod sorbite content through an instrument analyzing instrument, so that the accuracy in quantitative measuring of the sorbite content is effectively reduced, and the analyzing error is removed; and the measuring result has relatively high traceability and data reproducibility; and the preparation method is simple and easy to operate.

The invention belongs to the technical field of a test for detecting the nutrient releasing rate of a controlled-release fertilizer, relates to a device and method for rapidly detecting the nutrient releasing rate of the controlled-release fertilizer based on an electric conductivity method, and particularly relates to a device and method for rapidly detecting the still water dissolution rate and the accumulation releasing rate of the controlled-release fertilizer based on the electric conductivity method. The device comprises a bracket, a water feeding device, a glass container, a digital display electric conductivity instrument, an electronic stirrer, a PCL control system for controlling detection steps and the like. With the adoption of the special device, an uneven concentration distribution phenomenon caused by external temperature fluctuation and long-time standing of a solution to be detected is avoided; and the detected electric conductivity value of a nutrient solution is relatively reliable and accurate, and meanwhile, the operation time is greatly shortened.

The invention discloses a double-sided coated plate film weight measuring method. It includes the following steps: using white cleaning cloth or sand paper to scrape off the sample single face film to expose the base material; using solvent permeated sand cloth to clean the film; dying the sample surface; clicking out the sample with certain area; using unmixed solvent to clean the two sides of the sample; drying; weighing on the analytical balance; dipping into inorganic solvent to remove another coating; taking out to wash and dry; using analytical balance to weight; dividing the different value of the two-time weighting by sample area to gain unit area coating film weight. This method is fast, exact, and has small error.

The invention relates to a self-adapting contact probe set, which is characterized in that four probe assemblies with the surrounding centers distributed in 90 degrees are included, wherein each of the probe assemblies comprises probe components and a moving device, and the probe components are arranged on the moving device which can move forward to the center or reset under dynamic function. Each of the probe components comprises a base body, a spring and a probe; wherein the base body is provide with two shoulder holes, and each shoulder hole is internally provided with a probe and a spring. Under the function of the spring, one end of the probe extends out of the shoulder hole. The self-adapting contact probe set can not only finish sample measurement at one time and make sure that the contact force of each set of probe meets standard requirements, but also avoid the change of the equipotential surface of the sample in the rotating detection process. In addition, the self-adapting contact probe set is characterized by convenient use, high measurement accuracy, good data reproduction quality, low requirement of sample processing accuracy, etc.

The invention discloses a sensor for testing the deformation degree of a mining coal seam floor. The sensor comprises a steel pipe skeleton, strain rosettes and an epoxy resin layer. Four strain rosettes are arranged and are pasted on the upper part and the lower part of the outer wall of the steel pipe skeleton respectively at an included angle of 90 degrees; each strain rosette is formed by twostrain gauges perpendicular to each other; each strain gauge includes a substrate formed by bonding of an upper thin piece and a lower thin piece and a sensitive grid is arranged between the upper thin piece and the lower thin piece; two wiring terminals are arranged at one end of each substrate and are connected with the sensitive grid by tin-plated copper wires; and an adhesive is arranged on the outer surface of the substrate, one side of the adhesive is adhered to the outer surface of the substrate and a piece of oily gummed paper is pasted on the other side. The outer wall of the steel pipe skeleton is coated with an epoxy resin by means of pouring. According to the invention, with the strain gauges, a phenomenon that the strain gauges fail to work because of lead dragging during theconnection process is prevented; the strain gauges can work normally and effectively in various severe environments. The data processing is simple; and the tested data reproducibility and comparativeproperty are good.

The invention discloses a method for screening uric acid-lowering small molecule compounds for promoting uric acid excretion based on a patch clamp technology. The method comprises the following stepsof: constructing recombinant plasmids for expressing a GLUT9 gene; instantaneously transfecting the recombinant plasmids to an HEK293T cell; after 18-24 hours, recording the change of a current whenthe GLUT9 cells are expressed to transport uric acid by utilizing a patch clamp technology; and verifying the reliability of the model through positive drugs, namely benzbromarone and probenecid, andnegative drugs, namely RDEA3170 and allopurinol. The method is simple, convenient and rapid to operate; the result is stable, reliable and good in reproducibility; compared with an existing method fordetecting isotope uptake by using xenopus oocytes, the method has the advantages that the consumed time is shorter, the cost is lower, and high-throughput screening of the GLUT9 inhibitor can be achieved.

The invention belongs to the technical field of taste detection, and particularly relates to a heterogeneous solution sweetness detection liquid, application thereof and a detection method. The detection liquid comprises: 0.01-10wt% of ethanol and the balance a potassium chloride aqueous solution, and the wt% adopts the mass of the potassium chloride aqueous solution as a reference. The inventionalso discloses application and a detection method of the detection liquid. The heterogeneous solution sweetness detection liquid can be used for effectively, quickly, accurately and objectively evaluating the sweetness strength of beverages with low sugar content and beverages obtained by dissolving insoluble fragrant and sweet components in a sucrose solution. The method has the characteristics of standard operation, rapid detection and accurate data. Through application of the invention, different beverage sweetness characteristic graphs can be established, especially heterogeneous fruit juice beverages, and data support is provided for defining of the taste characteristics of different products, quantitative and quick identification and quality evaluation.

The invention discloses a testing method of the pulling stress of oriented silicon-steel coatings, which pertains to a technical field of oriented electric steel testing. The testing method comprises the testing steps of : sample preparing: one side of the oriented silicon-steel coating is protected by a special paint and the other side thereof is dissolved by a solution prepared by hydrogen fluoride, hydrochloric acid and water; the protective paint is removed by acetone as the organic solvent; the special paint relates to shellac and the sample is the oriented silicon-steel piece; testing: the pulling stress which arises between the coating and the silicon-steel piece is calculated according to the bending degree of the steel piece. The testing method has the advantage of low requirements for devices or equipment and is easy to realize. The chemical performance of the testing method is stable when being applied under different weather conditions, thereby shortening the experiment cycle, lowering the experiment cost, ensuring easy operation of testing, additionally, ensuring precise test results and good data repeatability.

The invention discloses a pretreatment method for pyrolysis analysis of flavor used for extract type tobacco. The method comprises following steps of freezing the to-be-analyzed flavor used for extract type tobacco; drying the frozen flavor in a vacuum manner; smashing the dried flavor into powder, weighing after the flavor powder is mixed evenly and carrying out sample packing for a hot filamenttype pyrolysis instrument. As the ultra-low temperature freezing treatment is adopted by the provided pretreatment method, compound components with low boiling point or heat sensitivity in the flavorsample can be reserved to the greatest extent; and the method has simple steps, is easy to operate and has good data reproducibility and wide range of application.