324 results about "Paper sample" patented technology

The invention discloses methods and systems for intelligent question recognition and correction. Through artificial intelligence, stems and answer contents of various types of questions in a test paper can be automatically recognized and the answer contents are corrected automatically. In the technical scheme, a neural network model (such as a CNN model) is trained to be a model for question typerecognition based on a large number of test paper samples in advance; the model which is formed through training is used to detect the position of each question in the paper, the type corresponding tothe question and different components (the stem, the answer and a picture) in the question; the printed character information of the stem and the written character information of an answer part are then recognized based on the recognition model; and finally, based on recognized character information, automatic correction is carried out.

The invention relates to a transformer oil-paper insulation electricity-heating unite ageing test device which comprises a sealing cavity and a test device body located in the sealing cavity. The test device body of the transformer oil-paper insulation electricity-heating unite ageing test device comprises a high voltage electrode, a low voltage electrode and an insulation paper sample, the insulation paper sample of the test device body is located between the high voltage electrode and the low voltage electrode, and electric ageing conditions of an oil-paper insulation test are controlled by controlling the voltage exerted to the insulation paper sample; the transformer oil-paper insulation electricity-heating unite ageing test device further comprises a heating device, and heat aging conditions of the oil-paper insulation test are controlled by controlling the heating temperature of the heating device; the transformer oil-paper insulation electricity-heating unite ageing test device further comprises a partial discharge detecting device, and high-frequency partial discharge detecting and low-frequency partial discharge detecting are achieved. By means of the transformer oil-paper insulation electricity-heating unite ageing test device, multi-state detection and fault diagnosis of a transformer can be achieved, an oil sample and gas in the sealing cavity after the aging test are directly taken out under the condition that the sealing cavity is not opened, the reliability of experimental analysis results is high, and the device is easy and convenient to operate, and the problem that an existing test device is low in reliability of the experimental analysis results and inconvenient to operate is solved.

The invention relates to a judging method of the solid insulating and aging degrees of a transformer, which sequentially comprises the following steps of: 1. preparing a gradient concentration standard solution of a furfural solution, carrying out liquid chromatographic detection, and making a standard curve I; 2. taking insulating paper samples in an actual electric network transformer, carrying out the liquid chromatographic detection, and obtaining the furfural concentration in each sample according to the standard curve I; 3. respectively measuring the water content H thereof by adopting the insulating paper samples in the step 2, computing the dry paper concentration C, additionally sampling, measuring the specific viscosity thereof, and computing the polymerization degree of the insulating paper samples according to a Martin empirical formula; 4. making a standard curve II by using the polymerization degree of insulating paper as an abscissa and using the logarithm of the furfural concentration as an ordinate; and 5. measuring the furfural concentration for an unknown sample, obtaining the polymerization degree of the insulating paper according to the standard curve II in the step 4, and judging the solid insulating and aging degrees of the transformer according to an IEC60450 standard. The method only needs to extract proper oil samples, has simple operation, does not need power failure, and is a quite practical method.

Disclosed are compositions and methods wherein graphite oxide was exfoliated and dispersed in propylene carbonate (PC) by bath sonication. Heating the graphene oxide suspensions at 150° C. significantly reduced the graphene oxide platelets; paper samples comprised of such reduced graphene oxide platelets had an electrical conductivity of 5230 S/m. By adding TEA BF₄ to the reduced graphene oxide/PC slurry and making a 2-cell ultracapacitor, specific capacitance values of about 120 F/g were obtained.

The invention relates to a transformer oil/paper insulation aging experimental device and method. The experimental device comprises a high voltage electrode, a low voltage electrode, a seal cavity and a screening shell, the high voltage electrode and the low voltage electrode are disposed in the seal cavity, an insulation paper sample is arranged between the high voltage electrode and the low voltage electrode, the seal cavity comprises an upper seal cavity and a lower seal cavity, miniature oil injection holes and miniature oil pumping holes are formed in the upper seal cavity and the lower seal cavity, an O-shaped seal ring is arranged at the connecting position of the upper seal cavity and the lower seal cavity, the high voltage electrode is located in the upper seal cavity and provided with a first screw rod, and the low voltage electrode is located in the lower seal cavity and provided with a second screw rod. By means of the transformer oil/paper insulation aging experimental device and method, an oil/paper insulation structure required by an experiment can be adjusted according to experiment requirements, an oil sample can be directly extracted without movement of oil/paper insulation after aging is finished, and problems that oil/paper insulation aging experimental devices are complicated in structures and inconvenient to operate in the prior art can be solved.

The invention discloses a method for determining content of potassium, sodium, calcium and magnesium in cigarette paper simultaneously, which includes the following steps: cutting 100+/-0.1 mg of a cigarette paper sample, using 100mL of 0.02mol/L hydrochloric acid as an extracting agent, ultrasonic-extracting for 18-22min to obtain extract liquor, selecting 5.0mL of the extract liquor to a 25mL volumetric flask, bringing to the volume with 0.02mol/L hydrochloric acid to obtain diluent, and filtering the diluent through a 0.45 mu m filtering film to obtain sample liquid to be detected; selecting sodium chloride, potassium chloride, hexahydrate magnesium chloride and anhydrous calcium chloride, using pure water as solvent, preparing mixed standard solution through gradual diluting, and adding 0.02mol/L hydrochloric acid to prepare series standard working solution; detecting and analyzing the series working solution and the sample liquid to be detected respectively through an ion chromatographic instrument; and drawing a standard curve and calculating results. The method is fast and simple to operate, high in sensitivity, low in detection limit, good in recovery rate, and suitable for batch analyzing of important inorganic elements in the cigarette paper.

The invention discloses a method for testing and evaluating de-lipping performance of cigarette tipping paper. The method comprises the following steps of: firstly carrying out a permeation coloring treatment on a cigarette tipping paper sample; acquiring an image and carrying out an image analysis treatment; quantitatively measuring an area of the colored region; and evaluating the de-lipping performance of the cigarette tipping paper by using the proportion of the area of the colored region to the total area of the sample. According to the invention, the de-lipping performance of the cigarette tipping paper can be visually inspected and the de-lipping performance of the cigarette tipping paper can be characteristically and quantitatively analyzed simultaneously; and in addition, the method for testing and evaluating the de-lipping performance of the cigarette tipping paper provided by the invention has the advantages of simple and convenient method, simplicity in operating and easiness for popularization.

A sanitary tissue paper roll wherein, when a sanitary tissue paper roll of two-ply or three-ply is laid on a horizontal surface with its center axis in a horizontal orientation; and a circular plate indenter, having an area of 2 cm<2 >and being arranged at the center of an upper surface of an outer periphery of a body of said roll, is vertically pressed at least at respective pressing pressures of 0.5 gf/cm<2 >and 50 gf/cm<2>, a difference in depths upon said respective pressing is within a range of 2.5-3.5 mm. A sanitary tissue paper roll made by winding one sheet or two layered sheets of sanitary tissue papers wherein a roll compressibility of said roll is 0.68-0.74 m/cm<2>, said roll compressibility being defined as a value obtained by dividing a roll length by a cross section of said roll. A sanitary tissue paper for a sanitary tissue paper roll, wherein a sample paper is compressed between steel plates, which respectively have a circular surface with a compression area of 2 cm<2>, at a maximum compression load of 50 gf/cm<2>, and upon returning of said paper sample, a linearity of a displacement curve between a load and a thickness is 0.2500-0.3300 for a one-ply, and 0.3400-0.3700 for a two-ply; and a thickness upon a load of 50 gf/cm<2 >is equal to or above 0.1400 mm for a one-ply, and equal to or above 0.2500 mm for a two-ply.

The invention discloses a method for measuring trace heavy metal arsenic and lead in tobacco tipping paper, and in particular relates to a method for measuring the content of arsenic and lead in the tobacco tipping paper by using a calibrated atomic fluorescence spectrophotometer after the tobacco tipping paper is digested by nitric acid and sulfuric acid on an electric heating plate or in an electric furnace. The conventional method is simplified, the acid is not required to be driven repeatedly, sample treatment time can be saved, the interference of antimony and nickel elements in a detection result can be effectively eliminated, a tipping paper sample is quickly and efficiently measured, measuring accuracy is improved, and the method is a novel and applicable electric heating nitric acid digestion atomic fluorescence quantitative measuring method for the content of the arsenic and the lead in the tobacco tipping paper.

The invention provides aramid fiber paper which is composited in a multi-ratio layering manner and a preparation method of the aramid fiber paper. The layered composite aramid fiber paper comprises a surface layer, a core layer and a bottom layer, and is characterized in that the surface layer and the bottom layer are respectively made of following materials: 60 to 90 parts by weight of aramid fiber chopped fibers and 10 to 40 parts by weight of aramid fiber precipitation fibers; the core layer is made of the following materials: 5 to 40 parts by weight of aramid fiber chopped fibers and 60 to 95 parts by weight of aramid fiber precipitation fibers; the aramid fiber chopped fibers are meta-position aramid fibers or para-position aramid fibers with length being 6 to 10mm and fineness being 1 to 3 deniers; the aramid fiber precipitation fibers are irregular fibrous or thin-film fragmented meta-position aramid fibers; the surface layer and the bottom layer account for 40 to 80 percent of the weight of a piece of paper, and the core layer accounts for 20 to 60 percent of the weight of the piece of paper. By adopting the method, the mechanical performance, the insulation performance, the permeability and the specific surface area of a paper sample can be effectively improved.

The invention discloses a method for detecting Cr (VI) in cigarette paper by using an inhibition electrical conductivity detector characterized by ion chromatographic separation and large volume sample injection. The method comprises the specific steps as follows: shearing a cigarette paper sample into pieces, and accurately weighing cigarette paper pieces into a container; adding an extracting solution for vibrating extraction, and filtering the extracting solution by an aquo-system filter film, so as to obtain a to-be-detected solution; preparing a Cr (VI) standard solution, and testing and establishing a standard curve; and moreover, passing a filter liquor through an ion exchange column, and after isocratic elution, adopting the inhibition electrical conductivity detector and the ion chromatograph for analysis. According to the invention, as the large volume sample-injection electrical conductivity detector is adopted for detection, the derivation step is avoided, the preliminary treatment process is simplified, and the time, the labor and the materials for detection are saved; and further, the method can efficiently detect Cr (VI) in the cigarette paper, is rapid and reliable, is simple and convenient and easy to carry out, and fills the technical void in detecting Cr (VI) in the cigarette paper directly by the ion chromatography.

The invention relates to a method for measuring the color fastness to saliva of tipping paper for a cigarette. The method is characterized by comprising the steps of sticking the tipping paper sample with glass fiber paper soaked by simulated saliva to form a combined sample, and placing the combined sample under the pressure of a 1kg of load at the temperature of 40 DEG C; evaluating staining degree of the glass fiber paper by a colorimeter. The method is capable of better simulating the contact process between the oral cavity of the human body and the tipping paper on a cigarette filter, and is simple to operate and rapid in measurement speed; compared with a grey scale visual observation method, the method adopts the colorimeter for evaluating the staining fastness degree, so that the results are more objective and accurate, the interference of subjective mood and objective environment of people can be avoided, and the reproducibility is good.

The invention provides a test paper sample generation method and device, an electronic device and a storage medium. The method comprises: based on an image of a first test paper and a pre-trained topic area recognition model, identifying an area of each question on the first test paper, marking each component in the area of each question, the component comprising a question stem, an answer and/ora picture, and identifying characters corresponding to the question stem and the answer of each question through a pre-trained character identification model; storing the identified questions into a question sample library, and storing characters corresponding to the identified answers into a handwriting font sample library; and selecting at least one target question from the question sample library to form a second test paper, and selecting characters from the handwriting font sample library to fill the answer positions of the corresponding questions in the second test paper according to thestandard answers of the target questions so as to generate a new test paper sample. The problem that test paper samples are inconvenient to obtain in the prior art can be solved.

The invention discloses a diffusion measurement evaluation method for water in oil paper of an oil-immersed transformer. The diffusion measurement evaluation method comprises the following steps: firstly, preparing a transformer insulating paper sample; secondly, testing the mechanical strength of a polymer of an aged paper board; thirdly, establishing an extrapolation life model under the thermal aging temperature; fourthly, establishing an extrapolation life model under any thermal aging temperature and initial water content; fifthly, analyzing hot-spot temperature of a transformer winding, micro-water content in oil and real-time oil temperature data of the transformer. According to an insulation thermal aging life evaluation method of the oil paper based on a time-temperature water superimposition method, provided by the invention, accelerated aging data under high-temperature high initial water content can be extrapolated to data of low-temperature low water content under operation conditions, the defects in a traditional time-temperature superposition model can be overcome, and a more accurate and comprehensive life evaluation method is provided.

The invention provides a plate electrode device for measuring electric characteristics of oil flow. The device comprises an insulating shell and a metal aluminum electrode. An oil passage is formed in the insulating shell. Inwards-sunken grooves are formed on the end faces, where the inner sides of the oil passages are, of the insulating shell. The metal aluminum electrode comprises an upper electrode and a lower electrode. Each electrode comprises a main body and a column body which is extended upwards from the main body. Through grooves are filled with the column bodies of the metal aluminum electrode. The grooves are filled with the main bodies of the metal aluminum electrodes. An oil paper sample is positioned in the oil passage, and is fixed by oil paper fixing parts. The plate electrode of which the lower electrode is adjustable in height is embedded into the closed insulating shell, the position of the oil paper sample in the oil passage is adjusted by the oil paper fixing parts, and external accessories are matched, so that alternating current voltage, direct current voltage and alternating current-direct current voltage can be applied, an interval between the two electrodes is adjustable, the position of the oil paper sample in the oil passage is adjustable, and experimental researches on the electric characteristics of the oil flow of a transformer are diversified and targeted.

The invention discloses a method for determining nitrate and nitrite ions in cigarette tipping paper. The method consists of: cutting a tipping paper sample and weighing it, dipping sample fragments in deionized water, conducting water bath extraction, then carrying out static cooling to room temperature; taking the supernatant, and passing it through a water-based filter membrane syringe needle filter and a C18 column, thus obtaining a sample solution; weighing a nitrate ion standard solution and a nitrite ion standard solution, adding deionized water to a constant volume, and then implementing dilution with deionized water so as to obtain standard working solutions; then implementing ion chromatograph (IC) analysis on the standard working solutions and the sample solution to measure the peak areas of nitrate and nitrite ions in the sample, and substituting the peak areas into standard curves so as to calculate the content of nitrate and nitrite ions in the sample. The quality can be determined by standard substance retention time, and the quantity can be determined by the peak areas. The method can accurately determine the content of nitrate and nitrite ions in a cigarette tipping paper sample, has the advantages of rapidity, reliability, simplicity and practicability, and fills in the blank of determination of nitrate and nitrite ions in cigarette tipping paper at present.

The invention relates to a quality evaluation method of color ink-jet paper based on multi-level grey relational evaluation. The quality evaluation method comprises the following steps of: selecting a plurality of types of the color ink-jet paper which needs to be evaluated, and measuring basic physical performances of the paper; selecting a professional photo printer to sequentially print professional test versions, color scales and images on paper samples; measuring attribute printing performance of the printed images by an instrument; based on modeling which applies the multi-level grey relation technology to a comprehensive evaluation system, analyzing a plurality of evaluation data of the paper samples, calculating the relation degree of each type of the paper samples, finally establishing a printing quality evaluation system of the color ink-jet paper according to a multi-level grey evaluation model and then testing sensitivity of the system; and distinguishing the relationship among various influence factors according to a relation degree matrix. The quality evaluation method has the following beneficial effects that: a qualitative and quantitative evaluation result is obtained by applying the model based on the multi-level grey system to quality evaluation of the color ink-jet paper, thus solving the difficult problem that the overall quality of the color ink-jet paper is difficult to be scientifically and accurately evaluated in the printing field, obtaining the scientific and quantized comprehensive evaluation result of the paper quality, reaching a more scientific and accurate effect without judgment depending on subjective consciousness of a person, and playing a certain reference role in establishment of quality standard of ink-jet printing of the color ink-jet paper.

The invention discloses a method for measuring the migration amount of harmful substances in printing ink. The method comprises the following steps of: weighing the printing ink, adding the harmful substances, and mixing for later use; adding the printing ink into an offset print printability tester, then printing paper samples; weighing solid foods or food simulants, uniformly covering on unprinted surfaces of sample pages, then placing the sample pages in sealed glassware, and setting different time under a certain temperature for migration; and performing quantitative and qualitative analysis on the harmful substances on the migrated foods or food simulants by a gas chromatography instrument or a gas chromatography-mass spectrometry or a liquid chromatography instrument or a gas chromatography flame ionization detector. Compared with the traditional printing method, the method disclosed by the invention is low in cost, and the content deviation of harmful substances in different sample pages in the same printing conditions is smaller; sample pages to be measured are applied to a migration test, and relative standard deviation of parallel samples in migration results is also smaller than plus or minus 15%; and the method disclosed by the invention is used for manufacturing the sample pages to be measured by using the real printing ink and is capable of measuring the migration situation of the harmful ingredients in the real printing ink.

The invention belongs to the technical field of protection of ancient books, and discloses an ancient book processing liquid and an ancient book processing method. The ancient book processing liquid comprises an inorganic base liquid prepared by dissolving or dispersing an inorganic base in water and a quaternary ammonium salt liquid prepared by dissolving or dispersing a quaternary ammonium saltcompound in water. The ancient book processing method is as follows: clearing an impurity of the ancient book, processing at the constant temperature at the constant humidity, drying, and putting in closed deacidifying equipment, the inorganic base liquid and the quaternary ammonium salt liquid are atomized and introduced into the deacidifying equipment to process a paper sample, then the paper sample is dried and placed at the environment temperature to finish processing. The ancient book processing liquid and the ancient book processing method have the multifunctional processing effects of deacidifying, reinforcing, and inhibiting bacteria.

A quantitative determination method of fluorescent whitening agents VBL and ABP used in cigarette paper is characterized in that the method mainly includes steps mention below. The first step is to determine the chromatographic conditions. A chromatographic column is C18, 5Mu m column of 150mm*46mm. A mobile phase is methane or water with 45/55(V/V). The flow speed of the mobile phase is 1.0mL/min. The detection wavelengths include an excitation wavelength of 350mm and an emission wavelength of 425mm. The second step is the detection step, which is also a preparation step of a calibration curve. Treatment liquid for paper sample to be detected is injected in a high performance liquid chromatograph. The quality is determined according to the reserved time and the quantity is determined according to the peak area. The invention provides a quantitative determination method of fluorescent whitening agents VBL and ABP used in cigarette paper, which has the advantages of accurate detection and simple operation. The qualitative and quantitative detection of the fluorescent whitening agents VBL and ABP in cigarette paper, filter rod forming paper and cigarette tipping paper is made to be convenient for industry technicians. And potential damages on physical health of customers caused by excess whitening agent can be prevented.

The invention provides a rapid determination method for moisture content in the production of papermaking-process reconstituted tobaccos. The rapid determination method comprises the following steps: taking reconstituted tobacco rhombus-shaped sample slices which subjected to cutting, drying, and naturally moisture balancing in a cupboard; stacking 5 pieces of samples and weighing the mass; setting the control temperature of a flat plate paper sample dryer to be 120+/-1 DEG C; putting the samples on a drying plane of the flat plate paper sample dryer and drying for 2min; taking out the dried samples and weighing the mass; calculating the moisture content by utilizing a set formula. According to the method provided by the invention, detection equipment can be arranged on a production field and is used for rapidly detecting the moisture content of a product; the rapid determination method has the advantages of simplicity and convenience for operation, short detection time, less demanding quantity of the samples, relatively small errors of detection data and detection results of a traditional drying oven method and high repeatability of measurement results.

The invention discloses a measuring method for cobalt content in a piece of lining paper of a cigarette. The method comprises the steps of adding a nitric acid, a hydrochloric acid, a hydrofluoric acid and hydrogen peroxide to a lining paper sample of the cigarette, carrying out microwave digestion on the lining paper sample under a high pressure condition, carrying out acid driving and dilution volume metering on the lining paper sample to obtain a solution to be measured, guiding the solution to be measured into an inductively coupled plasma source mass spectrometer via a hydrofluoric acid resistant cross-shaped atomizer, and adopting a four-stage rod collision pool technology to measure the content of the cobalt in a measuring sample; selecting the variety and dosage of a digestion reagent, and optimizing the digestion pressure, eliminating basal body interference of the inductively coupled plasma source mass spectrometer by adopting a collision pool mode (a kinetic energy screening KED technology), and selecting isotopic element and internal standard element. A detection method after optimizing has the advantages that the digestion is complete, the sensitivity is high, the recovery ratio and the repeatability are good, and the basal body interference caused by a great deal of aluminum ions can be overcome; the measuring method is suitable for a condition that technologists of the lining paper production enterprise for a tobacco industry and cigarettes can carry out quantitative measurement on the cobalt in the lining paper, and the blank of the technical field is filled up.

A method for curving the upper sample of leather shoes includes measuring the cental points of various lines on the upper sample, designing the shear edges at proper positions according to the styles and upper structures of leather, using different design approaches, and drawing its outline on paper sample. Its advantages are high speed and low cost.

The invention discloses a method for analyzing glass fiber in paper, which sequentially comprises the steps of: burning out a paper sample; putting into a muffle furnace to calcine; naturally cooling into room temperature in the muffle furnace after calcining; putting the sample into a micro-light microscope to observe; judging whether the other fibers are existed; if the other fibers are not existed, soaking and washing with concentrated hydrochloric acid or concentrated nitric acid, washing to be clean with deionized water, drying, cooling, and weighing; and if the other fibers are existed, soaking and washing with the concentrated hydrochloric acid or the concentrated nitric acid, washing to be clean with the deionized water, drying, and analyzing with the fourier transform infrared spectroscopy to test the content of the glass fiber.

The invention discloses a method for measuring organic acid radicals in cigarette paper, which comprises the following steps of: preparing organic acid radical standard liquid samples of different concentrations and allomaleic acid standard liquid samples of different concentrations; taking 10muL of the organic acid radical standard liquid samples and 10muL of the allomaleic acid standard liquid samples for conducting high performance liquid chromatograph analysis; obtaining a standard curve by using a peak area and the concentration of the organic acid radicals for drafting; cutting a cigarette paper sample to be measured into pieces in a conical flask with a stopper, adding a sulphuric acid solution with the pH value of 2 and oscillating for 25min at the speed of 200 rounds/min; after liquid made by oscillation is filtered by a filtering film, taking 10muL of a sample treating solution to be measured to conduct high performance liquid chromatograph analysis; determining the nature of the chromatogram peak position of each organic acid radical according to the retention time and reading out the concentration value of the organic acid radical from the standard curve by the measured peak area. The method overcomes the defects of relatively long analyzing time and uncommonly used instrument, is a method for fast measuring the organic acid radicals in the cigarette paper, with correct result and convenient operation, and can be applied to the tobacco industry.

The invention discloses an online monitoring system and method for cigarette paper. The method comprises the steps that a plurality of cigarette paper samples of different batches are scanned to obtain a first near-infrared spectrogram; cigarette paper with ingredient content different from that of the cigarette paper samples is selected, and the cigarette paper is scanned to obtain a second near-infrared spectrogram of the cigarette paper; a detection model is established based on the first near-infrared spectrogram and the second near-infrared spectrogram, and whether the cigarette paper meets the quality requirement or not is judged according to the detection model. According to the online monitoring system and method for the cigarette paper, the near-infrared spectrum technology is introduced, and the quality stability of the cigarette paper is monitored online in real time; after the detection model is established, the mahalanobis distances of the samples can be obtained in real time by scanning the spectrograms of the samples online, the mahalanobis distances are compared with the control requirement to detect whether the cigarette paper meet the quality requirement or not, and the online monitoring system and method for the cigarette paper are suitable for judging and monitoring the quality stability of products which are produced through the cigarette paper of the same kind in different batches.