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74results about How to "The test results are objective and accurate" patented technology

Full-automatic detection method for velopharyngeal closure under nasopharyngoscopy based on image processing

The invention discloses a full-automatic detection method for velopharyngeal closure under nasopharyngoscopy based on image processing. The detection method comprises the steps of acquiring a target image, preprocessing an image frame, removing text information and black regions in the image, calculating black cavity position of the image, calculating the area ratio of the black cavity area, making a preliminary judgment on the boundary state of the velopharyngeal opening, calculating the initial outline of the velopharyngeal opening based on a level set while determining the velopharyngeal opening is in an opening state, correcting the upper, lower, left and right boundaries to obtain a corresponding velopharyngeal opening boundary; and after the velopharyngeal opening boundary is segmented, calculating the velopharyngeal opening area and calculating the velopharyngeal closure. Compared with the prior art, the detection result is objective and accurate, a high degree of automatic measurement is realized, reliable reference data are provided for the digital evaluation of the velopharyngeal closure function clinically, the development needs for precision medical treatment are met, the accuracy of the extraction of the target area is improved, and the algorithm overhead is reduced.
Owner:SICHUAN UNIV

Automatic detection method for uraniscolalia pharyngeal fricatives based on FTSL spectral line

The invention discloses an automatic detection method for uraniscolalia pharyngeal fricatives based on a multi-delay four-order-cumulant-octave FTSL spectral line, and relates to the field of voice signal processing. The detection method comprises the following steps: (1) carrying out signal preprocessing, namely, carrying out framing, pre-emphasis and amplitude normalization on input consonant signals; (2) extracting the features of voice signals, namely, extracting FTSL spectral line features in the frequency domain of the multi-delay four-order-cumulant of each frame of voice, and carryingout equal-ratio mean value envelope array extraction in the time domain; and (3) after the time domain and FTSL spectral line signal features of the voice signals are extracted, carrying out automaticclassification on the voice signals by adopting the combined classifier recognition algorithm in combination with the time domain equal-ratio envelope mean value array and the FTSL spectral line features, and outputting the classification result. Compared with the prior art, the method provided by the invention has the advantages that the detection result is objective and accurate, the automaticmeasurement with relatively high degree can be realized, thus reliable reference data are provided for the digital evaluation of pharyngeal fricatives clinically, the accurate medical development demand is conformed, and more accurate and effective signal classification recognition is carried out.
Owner:SICHUAN UNIV

System and method for measuring energy saving rate of building insulation material

The invention provides a system and method for measuring an energy saving rate of a building insulation material. The measuring system comprises at least two identical detection rooms and further comprises at least one air conditioner and a wireless data transmission device, wherein each detection room comprises floor, enclosure walls and a roof; each air conditioner is provided with an independent power supply; the independent power supply is connected with an electricity meter; and the wireless data transmission device is used for transmitting data of the electricity meter. The measuring method comprises the following steps: respectively mounting to-be-measured sample plates and comparative sample plates in different detection rooms; respectively recording the power consumption data acquired by the electricity meters of the detection rooms provided with the to-be-measured sample plates and comparative sample plates as Qsample and Qcompare; and calculating the saving rate n of the power consumption according to a formula n=(Qsample-Qcompare) / Qcompare*100%. The evaluation method has the advantages that a detected value of the heat-insulating property is closer to an actual value after application of a building envelope, and reliable reference data is provide for application and popularization of the building insulation material, particularly an insulating mould coating.
Owner:CHINA TEST & CERTIFICATION INT GRP CO LTD

Method for testing friction-resistant color fastness of pigment for calligraphy and painting

The invention discloses a method for testing the friction-resistant color fastness of pigment for calligraphy and painting. The method includes the steps that Chinese art paper or silk is mounted with paste and aired, and the mounted Chinese art paper and the mounted silk are obtained; the to-be-tested pigment is painted to the surface of the mounted Chinese art paper or the surface of the mounted silk and aired, and an aired sample is obtained; the to-be-tested pigment painted to the sample is subjected to reciprocating friction through a friction head wrapped by lily-white cotton cloth, the brightness, the red and green contrast ratio and the yellow and blue contrast ratio of the lily-white cotton cloth before friction and after friction are tested respectively, the color difference value delta E is computed, and it can be achieved that the friction-resistant color fastness of the pigment is evaluated through the color difference value delta E. By means of the method, an objective test method is provided for evaluating the friction-resistant color fastness of the pigment for calligraphy and painting, and the testing method is accurate and reliable in data, small in experimental error and accurate and objective in testing result.
Owner:首都博物馆

System and method for measuring equivalent thermal resistance of building thermal insulation material

The invention provides a system and method for measuring an equivalent thermal resistance of building thermal insulation materials. The measuring system comprises at least two identical detection rooms, at least one heat flow sensor, and a wireless data transmission device. Each detection room comprises at least one pair of temperature sensors detachably and symmetrically disposed on the inner side and the outer side of a wall or a roof. The heat flow sensor is detachably disposed adjacent to an inner temperature sensor. The wireless data transmission device is used for transmitting data of the temperature sensor and the heat flow sensor. The measuring method comprises the following steps of: mounting templates to be tested and comparison templates in different detection rooms respectively; obtaining detection point data: T template 1, q template and T template 2 or T comparison template 1, q comparison template and T comparison template 2; and calculating the equivalent thermal resistance R according to a formula. A detected value of the evaluation method on the thermal insulation performance is closer to an actual value after applying an architecture protective structure so as toprovide reliable reference data for the application and promotion of building insulation materials, especially thermal insulation coatings.
Owner:CHINA TEST & CERTIFICATION INT GRP CO LTD

Automatic recognition method for pharyngeal fricative in cleft palate speech based on PICGTFs and SSMC enhancement

The invention discloses an automatic recognition method for pharyngeal fricative in cleft palate speech based on PICGTFs and SSMC enhancement, which relates to the field of speech signal processing. The method uses piecewise index compression Gammatone filters PICGTFs to carry out filter processing on the speech, a speech signal spectrogram in each channel is subjected to enhancement processing based on a SSMC (Softsign-based Multi-Channel) model and a DoG (Difference of Gaussian) model, a feature vector is extracted from the enhanced spectrogram respectively and put to a KNN classifier for pattern recognition to determine whether to belong to the pharyngeal fricative, and the same classification result is taken as a final recognition result of the algorithm. The method makes full use of the differences between the pharyngeal fricative and the normal speech in frequency domain distribution of spectral energy, and in comparison with the prior art, the detection result is objective and accurate, high-degree automatic measurement is realized, reliable reference data are provided for clinical digital evaluation of the pharyngeal fricative, the development needs of precise medical treatment are met, and more accurate and effective signal classification and recognition can be carried out.
Owner:SICHUAN UNIV

Main machine apparatus for testing lubricating performance of fuel oil

The invention discloses a main machine apparatus for testing the lubricating performance of fuel oil. The main machine apparatus comprises a vibration exciter, a main shaft connector, a shaft rod assembly, a test apparatus and a heating and measuring apparatus, wherein the main shaft connector is arranged on one end of the vibration exciter and used for making reciprocating movement under the effect of the vibration exciter; one end of the shaft rod assembly is connected with the main shaft connector; the test apparatus comprises a test part, a test sheet and an oil box, the test sheet is arranged on the inner bottom of the oil box, one end of the test part is accommodated in the oil box and presses the test sheet, and the other end of the test part is connected with the other end of the shaft rod assembly; and the heating and measuring apparatus is used for supporting the oil box, the oil box is used for accommodating a fuel oil sample, and the heating and measuring apparatus is usedfor heating the oil box and detecting the vibration of the oil box. By adopting the main machine apparatus, the lubricating performance of the fuel oil can be detected, the operation is simple, and the test result is objective and accurate.
Owner:BEIJING CHAOYANG GAOKE APPLIED TECH RES INST CO LTD

Automatic quality testing method for IPTV and OTT set top boxes

The invention provides an automatic quality testing method for IPTV and OTT set top boxes. A comprehensive IPTV and OTT tester comprises a PON optical fiber programmed switch module, a power supply programmed switch module, a gigabit Ethernet video stream receiving and transmitting analysis module, an HDMI set top box receiving module and an infrared receiving and transmitting control module. Test index content comprises the network timeout and self-recovery functions of the set top boxes, the starting speed and the matching performance of the set top boxes, set top box television picture data analysis and comparison, automatic switching of different functions by simulating user operations and analysis on signal parameters and the quality of the IPTV and the OTT. Compared with a traditional manual testing method, the method is significantly improved. The testing cycle is short, the testing precision can reach the millisecond level, the repeated testing consistency is good, and the testing result is accurate and objective; and in addition, day-night 72-hour testing which cannot be achieved in manual testing can be achieved. Accordingly, the improvement iteration speed of the quality of the set top boxes is significantly increased, and then the watching satisfaction degree of users is increased.
Owner:TIANJIN DEVISER ELECTRIC INSTR

Method for measuring amino group contents of chitosan derivatives on basis of headspace gas chromatography

InactiveCN110068632AReduce dosageEasy to operateComponent separationGas chromatography measurementRelative standard deviation
The invention discloses a method for measuring amino group contents of chitosan derivatives on the basis of headspace gas chromatography. According to the method, excess ninhydrin is reacted with a standard substance containing an amino group; sodium hydrogencarbonate is reacted with the remaining ninhydrin to generate carbon dioxide; the standard substance is not added in a control group; the peak area of carbon dioxide is measured through the headspace gas chromatography; the relative reduction of the carbon dioxide is in a linear relationship with the mass of the standard substance; a standard curve is established and the standard substance is replaced by a chitosan derivative, the amino group content of which is to be measured; and the peak area of the carbon dioxide is detected; the mass of the corresponding standard substance at the moment is obtained according to the standard curve; and calculation is carried out to obtain the amino group content at the moment. When the method is compared with the traditional conductometric titration method, the relative errors do not exceed 13.03%, and for the detection of a same sample, the maximum relative standard deviation is 4.83%, sothe results are objective and accurate and the method is higher in speed when being compared with the traditional measuring methods.
Owner:SOUTH CHINA UNIV OF TECH

Recognition method of cleft palate speech nasal leakage based on recursive graph analysis

The invention discloses a recognition method of cleft palate speech nasal leakage based on recursive graph analysis, which relates to the field of speech signal processing. The detection method comprises the following steps: (1) preprocessing the speech signal, downsampling the input speech signal, and performing normalizing framing, pre-emphasis and amplitude normalization; (2) obtaining a recursive graph and a matrix recursive graph of the speech signal after the preprocessing; (3) performing trend analysis of recursive graph; (4) directly dividing the region into blocks for recursive graphand performing matrix processing for recursive graph; (5) performing image processing on the recursive image, and subjecting the image matrix after format conversion to binarization processing and filtering with two special structure templates in turn; (6) classifying and recognizing the signal by using classifier to obtain an automatic recognition result. Compared with the prior art, the detection result is objective and accurate, realizes a higher degree of automatic measurement, provides reliable reference data for the clinical digital evaluation of cleft palate speech nasal leakage, meetsthe development needs of precision medicine, and performs more accurate and effective signal classification and recognition.
Owner:SICHUAN UNIV
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