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170 results about "Matched sample" patented technology

Statistics Definitions > Matched Samples. Matched samples (also called matched pairs, paired samples or dependent samples) are paired up so that the participants share every characteristic except for the one under investigation. A “participant” is a member of the sample, and can be a person, object or thing.

Touch determination by tomographic reconstruction

A touch-sensitive apparatus comprises a panel configured to conduct signals from a plurality of peripheral incoupling points to a plurality of peripheral outcoupling points. Actual detection lines are defined between pairs of incoupling and outcoupling points to extend across a surface portion of the panel. The signals may be in the form of light, and objects touching the surface portion may affect the light via frustrated total internal reflection (FTIR). A signal generator is coupled to the incoupling points to generate the signals, and a signal detector is coupled to the outcoupling points to generate an output signal. A data processor operates on the output signal to enable identification of touching objects. The output signal is processed (40) to generate a set of data samples, which are indicative of detected energy for at least a subset of the actual detection lines. The set of data samples is processed (42) to generate a set of matched samples, which are indicative of estimated detected energy for fictitious detection lines that have a location on the surface portion that matches a standard geometry for tomographic reconstruction. The set of matched samples is processed (44, 46) by tomographic reconstruction to generate data indicative of a distribution of an energy-related parameter within at least part of the surface portion.
Owner:FLATFROG LAB

Chemical vapor deposition method of Si-B-C-N amorphous ceramic

The invention relates to a chemical vapor deposition method of a Si-B-C-N amorphous ceramic. The chemical vapor deposition method comprises the following steps of: suspending a substrate material on a matching sample bracket of a vacuum furnace, putting samples in a centre of an isothermal region in the furnace and preparing even Si-B-C-N amorphous ceramic on the surface / interior of the substrate material by using a CVD (Chemical Vapor Deposition) / CVI (Chemical Vapor Infiltration) method. The Si-B-C-N amorphous ceramic prepared by the chemical vapor deposition method can be applied to an interface, a matrix and a coating of a continuous fiber-reinforced ceramic matrix composite, has the advantages of excellent properties such as good high-temperature stability, good anti-oxidation property, strong creep resisting capability, low density, low coefficient of thermal expansion and low heat conductivity coefficient and the like, can replace materials such as SiC and Si3N4, further improves the using temperatures and prolongs the service lives of thermal structure ceramics and ceramic matrix composites and has a great application potentiality in the isothermal and long-life field of aircraft engines and industrial gas turbines; and meanwhile, the Si-B-C-N amorphous ceramic also has electrical properties similar to the semiconductors and interesting optical properties and is widely used in the fields of high-temperature invisibility, semiconductors, photoelectricity, communication and control.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Quick retrieval method and device of face recognition

The invention discloses a quick retrieval method and device of face recognition. The method comprises the following steps: establishing a sample database, carrying out binaryzation transformation on sample data, and carrying out Hash mapping on the sample data into a plurality of Hash tables; in the same way, carrying out the binaryzation transformation on the characteristic data of a sample to be queried, and utilizing Hash function projection adopted by establishing the sample database to obtain a binary code queue, and extracting matched samples in the plurality of Hash tables from the corresponding buckets of the Hash tables to carry out merge sort; calculating a Hamming distance between the binary characteristics of the sample to be queried and the binary characteristics of an effective sample subjected to the merge sort; and carrying out 1:1 accurate comparison on the effective sample of which the Hamming distance is smaller than a set threshold value and the sample to be queried to obtain most similar sample data. Through hierarchical query, a retrieval amount is drastically reduced, a floating point calculated amount is greatly reduced, and retrieval efficiency is high. In addition, the retrieval scheme has the advantages of high adaptation, wide application range and good popularization value.
Owner:智慧眼科技股份有限公司

Oil species identification method by sea oil spill concentration auxiliary auxiliary parameter fluorescence spectrum

The invention discloses an oil type identification method. The oil spill fluorescence spectra of serial concentrations in a certain concentration range are taken as fingerprint identification indexes to identify oil types, and can be considered as a traditional fluorescence spectrum plus a dimensionality that is the concentration so as to obtain more fluorescence signals of an oil spill sample, thus improving capability of identifying the oil types. The identification method comprises the following steps: half-diluting the normal oil spill sample with a certain fixed original concentration to prepare extraction liquids of the serial concentrations, and measuring the fluorescence spectra of the extraction liquids; selecting a 3D fluorescence spectrum or a synchronous fluorescence spectrum according to requirements for detection precision and data processing speed, thus establishing a concentration parameter supplemental characteristic spectrum database of the normal oil spill samples of different oil sources sequentially. While identifying the oil type of a certain oil spill sample, the oil spill sample is extracted and diluted in the same way, and the corresponding characteristic spectrum is obtained and identified by being compared with the sample characteristic spectrum in the database, thus the optimal matched sample is the oil type of the oil spill sample.
Owner:WEIFANG UNIVERSITY

High-resolution mass spectrum data processing method

The invention discloses a novel method for processing high-resolution mass spectrum data, which belongs to the field of analytical chemistry. The method comprises the following steps: rapidly reading an XML file of original mass spectrum data, automatically deducting backgrounds from data chromatogram direction in a segmented mode, and preliminarily obtaining the mass spectral characteristics of the original data according to two parameters customized by user, wherein two parameters can be mass spectrum response threshold value and total characteristic peak number. On this basis, the data can be divided according to fixed size of a window from two directions of mass spectrum and chromatogram, distance between every two of mass spectral characteristics in a matched sample and a reference sample in the window is calculated, a shortest path in distance matrix can be obtained by employing a linear programmed optimization method, an optimal coupling relation table of the characteristic peaks is constructed, and drift of the samples can be corrected. Based on a high-resolution mass spectrum data peak fusion method, association relation between characteristics in same metabolism micromolecule and a coupling peak table of multiple samples can be obtained, so that identification of a metabonomics marker and discovery can be realized. The method is suitable for analyzing high-resolution mass spectrum data with low signal to noise ratio and complex background.
Owner:DALIAN CHEM DATA SOLUTION TECH CO LTD

Depth domain phase-control inversion method

ActiveCN106707339AAvoid lossGuaranteed high resolution featuresSeismic signal processingIntermediate frequencyWell logging
The invention provides a depth domain phase-control inversion method. The depth domain phase-control inversion method comprises the steps of: A, carrying out seismic phase analysis; B, matching sample wells having similar waveforms; C, filtering in a range higher than a seismic frequency band to filter out a high frequency band, so as to find cut-off frequency of the similar waveforms having common structures; D, performing interpolation to establish an initial model, and carrying out phase control by combining with a seismic phase analysis result during the interpolation process; E, performing frequency analysis on seismic data, determining a low-pass frequency and a high-pass frequency, and filtering the initial model to filter out the low-pass frequency and the high-pass frequency, so as to obtain a band-notched initial model; F, combining with colored inversion, and merging an intermediate-frequency portion of colored inversion with low-frequency and high-frequency portions of the band-notched initial model by utilizing a frequency domain to obtain an absolute wave impedance or velocity invertomer, thereby completing depth domain reservoir inversion. The depth domain phase-control inversion method overcomes the high-frequency information loss caused by resampling during the well-logging curve time-depth conversion process, and effectively guarantees the high resolution feature of the seismic data.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1

Image annotation method based on weak matching probability canonical correlation model

The invention discloses an image annotation method and system based on a weak matching probability canonical correlation model, relating to the technical field of processing of network cross-media information. The image annotation method comprises the following steps: obtaining an annotated image and a non-annotated image in an image database, respectively extracting image features and textual features of the annotated image and the non-annotated image, and generating a matched sample set and an unmatched sample set, wherein the matched sample set contains an annotated image feature set and an annotated textual feature set; and the unmatched sample set contains a non-annotated image feature set and a non-annotated textual feature set; training the weak matching probability canonical correlation model according to the matched sample set and the unmatched sample set; and annotating an image to be annotated through the weak matching probability canonical correlation model. According to the invention, correlation between a visual modality and a textual modality is learned by using the annotated image, keywords of the annotated image and the non-annotated image simultaneously; and an unknown image can be accurately annotated.
Owner:INST OF COMPUTING TECH CHINESE ACAD OF SCI +1

Method and system for identifying optical signal modulation format

The invention relates to a method and system for identifying a modulation format based on optical signals in the field of optical fiber communication. The method includes the steps that a TDC exerts certain dispersion values on input optical signals to be identified and then outputs the optical signals, after passing through an optical amplifier, the optical signals are injected into a non-linear power transfer function NPTF generating module, and a optical power meter measures signal average power of the output end of the non-linear power transfer function NPTF generating module; a control and digital signal processing module drives the TDC to generate a series of dispersion values and records each dispersion value and the signal average power, corresponding to each dispersion value, of the output end of the NPTF generating module, and the dispersion values and corresponding signal average power are stored as a dispersion-signal average power measured value array. Matching is carried out among various dispersion-signal average power samples with known modulation format signals and the dispersion-signal average power measured value array, and the modulation format of the best matched sample is discriminated as the modulation format of the input signals. The method and system for identifying the optical signal modulation format does not need any prior information at work, is suitable for signals with various modulation formats and speed and has the advantages of being simple in structure and high in cost performance.
Owner:HUAZHONG UNIV OF SCI & TECH

Lip language recognition identity verification method and device

The invention discloses a lip language recognition identity verification method and device. The method comprises the steps that structural light is projected to the face of a user on whom lip language recognition is performed, and a plurality of structural light images obtained after current user face modulation are photographed according to a preset collection period; phase information corresponding to the lip portion position pixel in the multiple structural light images is demodulated, and a plurality of three-dimensional lip images are obtained; corresponding lip-shaped feature information and lip shape difference information of the multiple three-dimensional lip images according to time sequence changes are extracted from the multiple three-dimensional lip images; lip shape feature information and lip shape difference information are matched by applying preset lip language model base sample feature information, and lip language information corresponding to the successfully-matched sample feature information is obtained; the lip language information and the preset verification information are compared; if the comparison result is that the lip language information and the preset verification information are the same, the user identity is verified, and the corresponding operation is legally authorized. Accordingly, the identity verification modes are enriched, and the identity verification accuracy is improved.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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