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61 results about "Biomedical information" patented technology

Biomedical information is information that relates to (or could reasonably be perceived as relating to) human health.

Practical method for removing artifacts from online electroencephalograph

InactiveCN107260166ASuper GaussianLarge kurtosisDiagnostic recording/measuringSensorsLinear driftTime domain
The invention relates to a practical method for removing artifacts from online electroencephalograph, and belongs to the technical field of biomedical information processing. The method corrects a down sampling of the reduced channel real-time electroencephalograph signals, a power frequency notch wave and a linear drift, the discrete wavelet transform is used for decomposing the down sampling of the reduced channel electroencephalograph signals into 7 layers, and single channel electroencephalograph signals are converted to multiple channels. The wavelet coefficients are reconstructed and used as inputs to ICA. Fast acquisition of independent components is implemented using Fast ICA algorithm. According to the characteristics of time domain, frequency domain and ordinal correlation of each artifact in the independent component, which is different from the normal electroencephalograph component, hierarchical clustering algorithm is introduced to cluster each independent component, the categories of artifacts are automatically recognized, the artifacts are reconstructed after the zero artifact is zero, and the reconstructed electroencephalograph signals are obtained. The method solves the problem that the prior method cannot automatically identify and remove a variety of conventional electroencephalograph artifacts in the absence of reduced channel.
Owner:KUNMING UNIV OF SCI & TECH

Human taxonomical hierarchymicrobial flora ecological network structure and function variation recognizing method

ActiveCN109584952AOvercome the defect of not being able to identify the variance of the degree of dispersionRealize identificationSystems biologyInstrumentsHuman bodyMicroorganism
The invention belongs to the field of biomedical informatics analysis, and discloses a human taxonomical hierarchymicrobial flora ecological network structure and function variation recognizing method. Through the abundance values of all taxonomical hierarchies of a human body in different states, the relationship among microbial species is quantified; by analyzing the projection difference conditions of microbial florae in the T2 space in the different human body states, the variation of the microbial florae is recognized. The mean variation and covariance variation are recognized together, and the defect that mean hypothesis testing and other typical variation microbial recognizing methods cannot recognize discrete degree mutation conditions is overcome; the concept of the microbial flora subspace is put forward, the complicated relationship of the microbial florae is recognized, and the defect that a traditional method only recognizes the single microbial flora variation conditionsis overcome; the evaluating method for quantifying the microbial variation conditions is provided, and the quantifying support is provided for analyzing the relationship between the microbial flora variation and the human disease generation and development.
Owner:NANJING MEDICAL UNIV

Adaptive control method and device for limit deviation in skin electrical signal testing

The invention relates to the technical field of biomedical information processing, and provides an adaptive control method for the limit deviation in a skin electrical signal testing. The adaptive control method comprises the steps as follows: a reference voltage B is set, and a testing electrode is applied to a human body; skin electrical signals A of the human body is picked up through the testing electrode under the action of the reference voltage B; the skin electrical signals A are amplified through a primary amplifying circuit so as to obtain amplified electrodermal response signals A1;the amplified electrodermal response signals A1 subtract the reference voltage B so as to obtain voltage difference C; the voltage difference C is processed through a secondary amplifying circuit so as to obtain amplified voltage difference C1; the amplified voltage difference C1 is processed through analog-to-digital conversion; in addition, the reference voltage B is regulated step by step if the absolute value of C1 is more than the threshold value V1 of a the circuit so as to lead the absolute value of A1 minus B is less than V1, or the reference voltage B and C1 are output or stored. Theinvention also provides an adaptive control device for the limit deviation in the skin electrical signal testing.
Owner:CHONGQING UNIV OF POSTS & TELECOMM
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