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279 results about "Correlational analysis" patented technology

Indoor environment quality intelligent evaluation method based on multi-dimensional data fusion

ActiveCN120725533AMachine learningCorrelation coefficientMean vector
The invention relates to the technical field of environmental parameter measurement, in particular to an indoor environment quality intelligent evaluation method based on multi-dimensional data fusion, which comprises the following steps: step 1, performing time-space synchronous acquisition on multi-source data; 2, a dynamic correlation model is constructed, a parameter coupling matrix is generated based on inter-parameter time-delay cross-correlation analysis, the time-delay cross-correlation analysis is achieved through sequence translation in a sliding time window and correlation coefficient calculation, an environment state class is constructed according to a parameter mean vector, fluctuation intensity and abnormal event marks, and a dynamic correlation model is constructed; each environment state class is bound with an independent parameter contribution degree weight set; step 3, performing double-stage environment quality evaluation; and step 4, adaptive increment optimization: when the deviation between the comprehensive evaluation index and the subjective evaluation exceeds a threshold value, adjusting a parameter contribution degree weight set of an environment state class, and periodically reconstructing a parameter coupling matrix. The prediction capability is improved by considering the time-delay coupling between the parameters; the system has self-learning and optimization capabilities, and the stability of long-term operation of the system is improved.
Owner:BEIJING ZHONGHUAN QUALITY ASSESSMENT ENVIRONMENTAL MONITORING CO LTD

Multi-source information integration runoff prediction method based on informer model

The invention discloses a runoff prediction model based on multi-source information integration of an Informer model, and belongs to the technical field of hydropower station runoff prediction. The invention aims to solve the problem of poor accuracy of medium and long term runoff prediction, especially for runoff sequences with multi-source, non-linear and non-stationary characteristics. The monitoring power station range is selected, and historical runoff data of the hydropower station and hydrological information such as rainfall and temperature of a surrounding area are obtained; adopting a Pearson correlation analysis method to select strong correlation features as multi-source time sequence feature input of an Informer model; preprocessing the data by using an STL seasonal decomposition method, and extracting characteristics of a period term and a trend term; runoff prediction is carried out by adopting a sparse attention mechanism and a self-attention distillation mechanism of an Informer model; according to the method, the prediction speed and feature capture can be enhanced, the runoff prediction accuracy is improved, and powerful support is provided for water resource management and scheduling of the hydropower station.
Owner:CHINA THREE GORGES UNIV

Inland water turbidity satellite remote sensing method based on optical classification and spectrum simulation

The invention discloses an inland water body turbidity satellite remote sensing method based on optical classification and spectral simulation, which comprises the following steps: S1, acquiring water body spectral data, water body turbidity, satellite remote sensing images and meteorological data of a to-be-detected area, and calculating water body remote sensing reflectivity; s2, preprocessing the satellite remote sensing image to obtain a water body area; performing equivalent calculation on the remote sensing reflectivity data of the water body actual measurement spectrum to obtain the remote sensing reflectivity of each channel of the satellite sensor; performing water body optical classification by combining the actually measured water body spectral shape and turbidity distribution characteristics of the research area; s3, performing correlation analysis on different optical types of the actually measured spectrum according to the actually measured turbidity and the remote sensing reflectivity of multiple channels of the satellite, selecting channel remote sensing reflectivity data with high turbidity correlation as a sample, and constructing a turbidity remote sensing model; the turbidity remote sensing model is trained and tested, and the optimal turbidity remote sensing model is screened out. The method can improve the precision of remote sensing inversion of the turbidity of the inland water body.
Owner:NANJING UNIV OF INFORMATION SCI & TECH

Enterprise evaluation method and system based on big data analysis

The invention relates to the field of enterprise evaluation, in particular to an enterprise evaluation method based on big data analysis, which comprises the following steps: acquiring target enterprise data of a target evaluation enterprise; performing data division on the target enterprise data of the target evaluation enterprise to obtain a target evaluation subset; determining a subset processing strategy according to the fragment execution state of each target evaluation subset; in the first confidence analysis mode, fragment quality parameters of one type of evaluation subsets are determined according to the subset execution efficiency and the reference correlation index, an efficiency adjustment mode is determined according to the fragment quality parameters, and confidence reference coefficients of the correlation analysis texts are determined; in the second confidence analysis mode, determining a subset execution coefficient of the second-class evaluation subset according to a reference association index and a theme association proportion, and determining a set setting mode and an effective evaluation strategy according to the subset execution coefficient; and determining the final evaluation score of each piece of target evaluation data. According to the method and the device, the accuracy of effectiveness evaluation of the obtained webpage information is improved.
Owner:GREATER BAY AREA SCI & TECH INNOVATION SERVICE CENT (GUANGZHOU) CO LTD

Extremely-short-term ship motion attitude prediction method and system based on data enhancement

The invention discloses an extremely-short-term ship motion attitude prediction method and system based on data enhancement, and relates to the field of ship motion attitude prediction. The method is used for solving the problem that data quality and model generalization performance are affected due to insufficient completeness of input data of a ship motion attitude extremely-short-term prediction model. The method comprises the following steps: performing data expansion on original observation ship attitude data by adopting a Slim-based generative adversarial filling network to obtain an expanded data set; performing data splicing and feature zooming on the original observation ship attitude data and the extended data set; performing time delay correlation analysis on the data after feature scaling to determine optimal sample data, then dividing the optimal sample data into a training set and a test set according to a proportion, and inputting the training set and the test set into a prediction model for training; optimizing parameters of the prediction model according to the prediction value of the training set; and outputting a predicted value by adopting the parameter-optimized prediction model, and carrying out reverse normalization processing to obtain a final prediction result. The method is suitable for extremely short-term ship motion attitude prediction.
Owner:HARBIN ENG UNIV

Landslide monitoring data prediction method fusing time-delay reconstruction and attention mechanism

The invention relates to the technical field of landslide monitoring, in particular to a landslide monitoring data prediction method fusing time-lag reconstruction and an attention mechanism, which takes landslide displacement historical monitoring data and external induction factors as modeling objects, and aims at nonlinear and time-lag characteristics of a landslide deformation process. Constructing a time-delay driving feature set through time-delay cross correlation analysis, and identifying a guiding-following causal relationship between landslide displacement and an induction factor; and a multi-source time-lag feature expression fused with an attention mechanism is constructed, and dynamic prediction modeling is performed on the landslide displacement through a gating recurrent neural network, so that accurate prediction of the landslide displacement trend and periodic change is realized. Experimental data prove that the method is superior to an existing traditional method in the aspects of landslide deformation prediction precision and robustness, the prediction precision, the feature utilization rate and the model interpretability are effectively improved, and the method has good engineering practicability and popularization prospects.
Owner:GUILIN UNIV OF ELECTRONIC TECH

Data error compensation method for biological network port flowmeter

The invention provides a data error compensation method for a biological net port flowmeter, and belongs to the technical field of ocean detection. A multi-dimensional sensor is arranged at a biological net port to collect fluid parameters, a deep learning model is used for recognizing multi-phase flow characteristics, and a corresponding compensation strategy is selected; based on a correlation analysis algorithm, compensation processing frequency is dynamically adjusted to achieve self-adaptive balance of precision and efficiency, the flow state change degree is monitored through the Euclidean distance, compensation parameters are hierarchically adjusted to ensure system stability, a parallel processing architecture is adopted to execute coarse compensation and fine compensation algorithms at the same time, and results are fused according to weights. Finally, dynamic and accurate compensation of the measurement error of the biological net port flowmeter in the complex multiphase flow environment is achieved, and the technical problem that in the prior art, the biological net port flowmeter cannot achieve dynamic and accurate error compensation in the complex multiphase flow environment is solved.
Owner:青岛道万科技有限公司 +2

Lithium ion battery health state prediction method based on double-branch feature fusion network

The invention discloses a lithium ion battery health state prediction method based on a double-branch feature fusion network, and the method comprises the steps: employing a unified feature analysis method to extract a plurality of health indexes based on NASA and CALCE battery data sets, and employing a Pearson correlation analysis method to select M health indexes highly related to the battery health state; based on the selected M health indexes, performing denoising processing on the health index data by adopting a variational mode decomposition method to obtain denoised health index data; constructing a dual-branch feature fusion network, and training by using the de-noised health index data to obtain a trained dual-branch feature fusion network; and utilizing the trained double-branch feature fusion network to predict a battery health state prediction value of the next round. According to the invention, by effectively integrating the multi-scale battery degradation characteristics, the accuracy, robustness and prediction precision of battery health state prediction are improved, and the adaptability and generalization ability of the network are enhanced.
Owner:YANGTZE DELTA REGION INST (QUZHOU) UNIV OF ELECTRONIC SCI & TECH OF CHINA

Information processing device, biological sample analysis system, and biological sample analysis method

An information processing device according to an aspect of the present disclosure includes an acquisition unit that acquires a fluorescence spectrum derived from a biological sample and position information of the biological sample from a sample including the biological sample, an identification unit (133b) that identifies, from the fluorescence spectrum, information regarding a plurality of different biomarkers of the biological sample associated with the position information of the biological sample, and a correlation analysis unit (133d) that performs matrix decomposition processing corresponding to a combination of the plurality of biomarkers on the information regarding the plurality of biomarkers and outputs a correlation of the information regarding the plurality of biomarkers.
Owner:SONY GROUP CORP

Anti-EMI (Electro-Magnetic Interference) cooling fan filtering and noise suppression system controlled by dynamic coupling path

The invention relates to the technical field of cooling fan control, and discloses an anti-EMI cooling fan filtering and noise suppression system controlled by a dynamic coupling path, and the system comprises a modeling subsystem which is used for carrying out the electromagnetic energy transfer modeling of a cooling fan, and obtaining an EMI energy balance equation set; the extraction subsystem is used for extracting the electromagnetic interference transfer relation among the components of the cooling fan; the calculation subsystem is used for calculating noise energy distribution data in a preset rotating speed range; the analysis subsystem is used for performing frequency self-correlation analysis on the parameter space distribution data to obtain EMI and noise parameter time sequence characteristic data; the real-time adjusting subsystem is used for inputting the EMI and noise parameter time sequence characteristic data into a prediction model for characteristic operation, PWM control correction parameters are obtained, the output power and the rotating speed of a heat dissipation fan are adjusted, and collaborative optimization among EMI suppression, noise control and heat dissipation performance is achieved through the system.
Owner:SHENZHEN HUAXIA HENGTAI ELECTRONICS

Transformer area current characteristic identification method based on correlation peak judgment method

The invention discloses a transformer area current characteristic identification method based on a correlation peak judgment method, and the method comprises the steps: collecting the synchronous phase information of a power grid, and generating and injecting a unique phase coding characteristic signal; current signals are collected at key nodes of the transformer area, and phase information is extracted; constructing a dynamic self-adaptive phase relation network, and extracting a feature vector with topology invariance; correlation analysis is carried out on the extracted feature vectors and a standard template, and an identification result is determined through adaptive correlation peak judgment; and dynamically adjusting system parameters according to an identification result. The method of combining phase coding and topology invariant features is adopted, and the method has the advantages of being high in anti-interference capacity, good in environment adaptability and high in recognition precision.
Owner:NANJING XINLIAN ELECTRONICS CO LTD

Visual intelligent detection device and method for tensile strain of fabric

The invention discloses a fabric tensile strain visual intelligent detection method. The method comprises the following steps: (1) acquiring a fabric tensile video; (2) video sequence frame preprocessing: performing batch processing on the acquired fabric stretching video, performing image extraction according to a time sequence, and preprocessing a video sequence frame image; (3) deformation characteristic index extraction and calculation, including real-time characteristic point extraction and matching and deformation calculation, to obtain elongation, narrowest shrinkage and Poisson's ratio; (4) improving an image correlation analysis algorithm; according to the innovative detection method provided by the invention, an advanced machine vision technology and image correlation analysis are fused, and a fabric performance visual detection module is improved. Deformation of the fabric in the stress stretching process is monitored in real time, microscopic strain characteristics are accurately captured, and comprehensive evaluation of the fabric performance is achieved. By automatically calculating the morphological characteristic index and Poisson's ratio of the fabric and visualizing the in-plane strain distribution, the detection efficiency and precision are greatly improved.
Owner:ZHEJIANG SCI-TECH UNIV

Individualized TMS target positioning method and system for spastic cerebral palsy children, equipment and medium

The invention provides an individualized TMS target positioning method and system for spastic cerebral palsy children, and aims to realize TMS precise nerve regulation and control for different types of SCP children. According to the method, the structural features of the healthy child are obtained, and after image processing, accurate division of the SCP child brain region is achieved, the defects of a current brain injury child brain region spectrogram are overcome, and a basis is provided for seed point selection of different SCP symptoms; multi-modal image parameter features are further scanned, whole-brain voxel correlation analysis is performed based on seed points to construct functional connection diagrams, the crossed and overlapped functional connection diagrams are searched to serve as a liability focus network of different symptoms, a voxel set close to the scalp surface serves as a TMS target, and SCP child treatment targets of different clinical symptoms are accurately positioned. Based on a focus network mapping technology, functional connection characteristics related to different symptoms or symptom complexes are better positioned, a specific brain network is identified, and an accurate intervention target is provided for TMS treatment.
Owner:WUXI CHILDRENS HOSPITAL +1

Lake cyanobacterial bloom pixel level prediction method based on multi-source data fusion

A lake cyanobacterial bloom pixel level prediction method based on multi-source data fusion belongs to the technical field of algae prediction, and comprises the following steps: collecting lake pixel level multi-source basic data in a satellite image and carrying out preprocessing, calculating an algae index to generate a binary distribution product, carrying out space-time matching according to a zoning factor suitability parameter table, and carrying out prediction according to the zoning factor suitability parameter table. Inverting a blue-green algae proliferation rate and adjusting a factor weight; calculating a pixel comprehensive suitability degree; identifying a hysteresis effect factor through correlation analysis and causal test; screening a high impact factor through feature sorting, constructing a diffusion rule, extracting an initial water bloom pixel and determining a diffusion starting point; and constructing a neighborhood iterative diffusion model by using the space-time dynamic pixel-level suitability matrix, and iteratively simulating and outputting a pixel-level water bloom prediction map. According to the method, through multi-source pixel-level data standardization processing and partition threshold modeling, the coupling diffusion model is optimized in combination with the multi-source data, accurate water bloom prediction is achieved, and the space-time precision and practicability of pixel-level prediction are improved.
Owner:JIANGSU CLIMATE CENT

Food-borne microorganism detection method and system based on spectrum technology

The invention relates to a food-borne microorganism detection method and system based on a spectrum technology. The method comprises the following steps: carrying out correlation analysis on the content sequence of each chemical substance in a plurality of blank matrix samples and the absorbance sequence of each wave band in spectral data of the plurality of blank matrix samples to obtain an aliasing coefficient of each wave band; analyzing the content of each strain in the plurality of strain samples and the absorbance of each wave band in the corresponding strain spectral data to obtain an absorbance influence coefficient between any two strains under each wave band; determining a flora representative coefficient of each wave band according to the number of the plurality of strains, the aliasing coefficient of each wave band and the absorbance influence coefficient of other strains on the first strain under the corresponding wave band; and according to the flora representative coefficient of each wave band and the absorbance sequence of the corresponding wave band in the spectral data of the plurality of target samples, screening a characteristic wave band from each wave band. According to the method, the analysis difficulty during coexistence of multiple flora in a complex matrix is simplified, and the generalization ability and the practical application value of the model are improved.
Owner:东港海关综合技术服务中心

Method for determining porosity of glutenite water flooded layer based on XRD (X-Ray Diffraction) logging technology

The invention relates to the technical field of exploration and development of water flooded layers, in particular to a sandy conglomerate water flooded layer porosity determination method based on an XRD (X-Ray Diffraction) logging technology, which comprises the following steps of: performing correlation analysis on the content of each mineral in mineral content data and the actually measured porosity of the same group; screening out mineral types of which the determination coefficient with the actually measured porosity is greater than a determination coefficient set value; performing multiple linear regression fitting on the content of each mineral type obtained by screening and the corresponding actually measured porosity of the same group to obtain an optimal multiple linear regression model; and for the rock debris sample of the non-coring section of the reservoir stratum of the glutenite water flooded layer, obtaining the porosity calculated value of the rock debris sample through the optimal multiple linear regression model. The porosity data of the rock debris sample of the non-coring section of the reservoir stratum of the glutenite water-flooded layer can be obtained, and the porosity data of the oil reservoir water-flooded layer of the whole well can be obtained by combining the porosity data of the coring section of the rock debris sample, so that the porosity data of the whole oil reservoir water-flooded layer can be obtained.
Owner:CNPC XIBU DRILLING ENG +1

Fan main shaft abnormity identification method based on sound and vibration signal conjoint analysis

The invention relates to the field of fan spindle state monitoring, and aims at synchronously acquiring sound and vibration signals through multiple channels, realizing nanosecond time alignment by adopting a precision time protocol, and performing denoising and normalization preprocessing on the signals to improve data integration and signal fidelity. Furthermore, short-time Fourier transform and continuous wavelet transform are combined to extract multi-scale time-frequency features, and a high-dimensional combined feature vector is generated in combination with cross-correlation analysis. And mapping the feature vectors to a low-dimensional manifold space through a local linear embedding algorithm, and constructing a dynamic mode reference template. Indexes such as curvature, track length and direction entropy are monitored in real time, whether the spindle has an abnormal evolution trend or not is judged through a self-adaptive curvature threshold, and abnormity judgment is achieved in combination with track backtracking verification. According to the scheme, the abnormal starting boundary of the spindle state can be caught in a refined mode, and the early warning and operation and maintenance response capacity of fan operation is effectively improved.
Owner:GUANGDONG ZHONGHUI ZHIWEI ENERGY MANAGEMENT CO LTD

Fruit wine quality prediction and improvement method based on machine learning

The invention discloses a fruit wine quality prediction and improvement method based on machine learning, and relates to the field of fruit wine and machine learning. According to the method, a multi-fractal detrending fluctuation cross correlation analysis (MF-DCCA) and a transfer entropy (TE) method are combined, a nonlinear causal relationship between physicochemical properties and quality scores of the fruit wine is analyzed, and key features are extracted; then, key characteristics of the fruit wine are adjusted within a reasonable range, and the quality of the adjusted fruit wine is predicted through a gradient lifting regression model. By analyzing the prediction result, data support can be provided for optimization and improvement of new fruit wine products. The controllability of the quality of the fruit wine can be improved, the research and development period is shortened, and material waste is reduced.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Constructed wetland invasive snail monitoring method based on space-time autocorrelation analysis

The invention discloses a method for monitoring intruded snails in a constructed wetland based on space-time autocorrelation analysis, which comprises the following steps of: acquiring image data of the constructed wetland by using image acquisition equipment, and simultaneously collecting environment variables, water microorganisms and soil physicochemical property data; effective data are obtained by screening image samples and removing colinear environment variables, and features are extracted by using image recognition and principal component analysis algorithms. And constructing a monitoring model based on the cellular automaton, optimizing parameters by means of an ANN algorithm, and further evaluating the intrusion risk. Spatio-temporal self-correlation analysis is combined with a geographic information system, spatio-temporal distribution characteristics of snails are researched, and a diffusion path and range are predicted. Compared with a traditional monitoring method, multi-source data are integrated, advanced algorithms and models are applied, the invaded snails can be monitored more accurately, a scientific basis is provided for prevention and control of the invaded snails in the constructed wetland, and an ecological system of the constructed wetland is effectively protected.
Owner:GUIZHOU INST OF BIOLOGY

Application of beta-alanine in preparation of medicine for preventing and / or treating uric acid metabolic disorder related diseases

The invention discloses application of beta-alanine in preparation of a medicine for preventing and / or treating uric acid metabolic disorder related diseases. The invention provides a theoretical source of beta-alanine for reducing the uric acid level. In the earlier stage, the applicant of the invention adopts non-target metabolome and targeted metabolome data to construct a hyperuricemia prediction model, and Rmcorr correlation analysis shows that high beta-alanine level and low uric acid level have strong correlation. On the other hand, beta-alanine acid is adopted to intervene in a hyperuricemia mouse, it is proved that beta-alanine can reduce the blood uric acid level of the hyperuricemia mouse and promote urine uric acid excretion, and beta-alanine can be used for preventing and / or treating uric acid metabolic disorder related diseases.
Owner:GUANGDONG GENERAL HOSPITAL

Method for identifying somatic depression by using brain structure and function abnormality

The invention discloses a method for identifying somatic depression by using brain structure and function abnormality, which comprises the following specific steps: selecting depression patients into groups, dividing the depression patients into a somatic depression patient group and a non-somatic depression patient group according to whether the score of a health questionnaire somatic symptom group scale of the patients is greater than or equal to 10, and recruiting a health control group at the same time. The three groups of subjects are subjected to resting state structure and functional magnetic resonance imaging scanning, and the brain grey matter volume and the brain region with significant difference are analyzed through a voxel-based morphological index and functional connection method. Pearson correlation analysis is adopted in SPSS26.0, and the relevance between the gray matter volume and the abnormal function connection of the patients in the SD group and the NSD group and the PHQ-15 scale score is compared. The method has the advantages that the illness state of the depression patient can be found in time, the patient can be treated at the best treatment opportunity, and early recognition of the body symptoms of the depression is beneficial for reducing waste of medical resources and relieving the pain of the patient.
Owner:XUZHOU DONGFANG PEOPLES HOSPITAL (XUZHOU PSYCHIATRIC PREVENTION & TREATMENT HOSPITAL)

EMD (Empirical Mode Decomposition) and correlation analysis-based double-probe vortex shedding flowmeter anti-interference method

The invention provides an EMD (empirical mode decomposition) and correlation analysis-based double-probe vortex shedding flowmeter anti-interference method, which relates to the technical field of signal processing, and is characterized in that a vortex shedding sensor signal sequence containing periodic vibration interference is decomposed into multi-scale IMF components through self-adaptive characteristics of an EMD method, and spectrum components of a flow signal and vibration noise are accurately separated. According to the method, aiming at the non-stable and multi-band coupling characteristics of double-probe signals, the vibration noise interference under the complex vibration interference of an industrial field is effectively solved, and the environmental adaptability of noise suppression is remarkably improved. According to the method, on the basis that the advantages of self-adaptive decomposition are reserved, the IMF component series is dynamically controlled, that is, only the IMF components of the first four stages are taken, redundant calculation caused by over-decomposition is avoided, and the real-time performance of the system is guaranteed. An upper probe signal is introduced to serve as a reference channel, interference components are removed through a correlation analysis method, the complexity of a blind source separation algorithm is reduced, and meanwhile the method has higher detection precision and stability.
Owner:NORTHEASTERN UNIV CHINA

Visual temperature sensitive area identification method and system of numerical control machine tool

The invention provides a visual temperature sensitive area identification method and system for a numerical control machine tool, and the method comprises the steps: carrying out the measurement of temperature field data, and employing a peak lag correlation algorithm to identify the temperature gradient change caused by the high-frequency component of a temperature signal; identifying a temperature gradient change caused by a low-frequency component of the temperature signal by adopting a self-adaptive inflection point time sequence detection algorithm; acquiring temperature field data and adjusting and identifying a data structure; and analyzing and verifying the visual temperature sensitive area by adopting hierarchical clustering-wavelet correlation, and outputting a visual result. According to the method, the arrangement position of the temperature sensor can be determined under the condition that the thermal error of the machine tool is not measured, so that the arrangement position of the temperature sensor is visualized, complex installation and debugging of multiple sensors are avoided, and the arranged sensors have high correlation coefficients while the time and the use cost of the instrument are saved; and establishing a thermal error mapping model under the condition of changing working conditions so as to carry out thermal error mapping under different operation conditions.
Owner:SHANGHAI JIAOTONG UNIV +1

Partially ordered data classification method and system based on order relevancy

The invention discloses a partially ordered data classification method and system based on order relevancy, and belongs to the technical field of partially ordered data classification research. Aiming at how to accurately recognize ordered features from a complex data set and solve the classification problem of ordered data, interference of other features in the ordered feature recognition process can be effectively removed on the basis of a Spearman correlation coefficient in combination with partial correlation analysis, and compared with other recognition methods, the method has the advantages that the recognition efficiency is improved, and the recognition efficiency is improved. According to the method, real ordered and unordered features in part of the ordered data set can be accurately distinguished; on the basis of a traditional monotonic neural network, a scheme of disordered feature weighting is utilized to design a partially-ordered neural network, so that the classification problem of partially-ordered data can be solved, and the problem that monotonic constraint is applied to ordered features on a partially-ordered data set while the influence of the disordered features is fully considered is solved; the method is superior to other existing algorithms in performance.
Owner:SHANXI UNIV

Music emotion recognition method and system based on parallel local attention and converter

The invention belongs to the technical field of audio signal processing, and discloses a music emotion recognition method and system based on parallel local attention and a converter, and the method comprises the steps: inputting an audio feature vector into a parallel local attention network and a converter network, and respectively extracting a local music feature and a global music feature; carrying out weighted fusion to obtain a fused feature vector; a music encoder is used to encode music features; using an emotion encoder to serialize the emotion labels into vectors, and outputting emotion features; using canonical correlation analysis to maximize the correlation between the music features and the emotion features; the similarity between music and emotion distribution is optimized through KL divergence loss; and by calculating the similarity, bidirectional retrieval of music recognition emotion and emotion recognition music is realized. The method can effectively improve the performance of the music emotion recognition task, has a wide application prospect, and particularly has an important application value in the fields of music recommendation, emotion calculation, human-computer interaction and the like.
Owner:EAST CHINA JIAOTONG UNIVERSITY

Multi-scale response analysis method for watershed runoff to landscape pattern

The invention relates to a multi-scale response analysis method of drainage basin runoff to a landscape pattern, ecological hydrological research is the basis of comprehensive management of a drainage basin, and the response relationship of the runoff to the landscape pattern is an important decision basis for integrated protection and systematic management of landscapes, forests, lakes, grasses and sand in the drainage basin. Taking the Poyang Lake basin as an example, the method comprises the following steps: establishing a basin SWAT model; determining parameter values of the Poyang Lake basin based on an SUFI-2 method and verifying the correctness of the parameter values; inputting parameters, and calculating the runoff volume of the Poyang Lake drainage basin through an SWAT model; constructing a landscape type division system of'landscape, water, forest field, lake, grass and sand 'based on land utilization / cover; selecting landscape indexes through collinearity diagnosis; the influence of landscape composition on the runoff is discussed by utilizing correlation analysis methods such as a scatter diagram, a Pearson's correlation coefficient and a geographically weighted regression model, and the response of the runoff to the landscape pattern is revealed in landscape and type scales. According to the method, the Poyang Lake basin is taken as a research object, runoff simulation and landscape pattern analysis are respectively carried out by utilizing an SWAT model and Fragstats software, and nonlinear characteristics of runoff response to landscape composition and landscape pattern are revealed.
Owner:INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI

Slurry balance shield tunneling machine stagnant drainage prediction model and method based on multi-target different-weight regression

The invention relates to the technical field of shield construction, in particular to a slurry balance shield tunneling machine stagnant drainage prediction model based on multi-target different-weight regression and a construction method thereof, and the construction method comprises the following steps: S1, collecting tunneling data, namely operation parameters, of a slurry balance shield tunneling machine; s2, grouping the tunneling data and performing Kalman filtering processing to obtain an accurate operation parameter set; s3, analyzing linear correlation degrees of different accurate operation parameters in the accurate operation parameter set by using Pearson's correlation to obtain correlation coefficients among the accurate operation parameters; s4, screening the accurate operation parameters corresponding to the correlation coefficients of which the absolute values are greater than a set threshold value to obtain a prediction factor set; s5, performing multi-target different-weight regression analysis on the prediction factor set, and constructing a stagnant elimination prediction model; s6, optimizing the stagnant elimination prediction model by using an ADMA algorithm; and S7, performing simulation verification on the optimized stagnant discharge prediction model by using Flomaster, and adjusting parameters of the stagnant discharge prediction model. The stagnant discharge prediction model can accurately predict the stagnant discharge phenomenon and can predict the stagnant discharge occurrence position.
Owner:ZHEJIANG SCI-TECH UNIV

Method for optimizing design parameters of tropical zero-carbon building integrated system

The invention relates to the technical field of building energy conservation and green buildings, and discloses a design parameter optimization method for a tropical zero-carbon building integrated system. According to the method, an input correlation-output uncertainty-global sensitivity three-dimensional analysis framework is constructed, through high-fidelity simulation modeling, Latin hypercube sampling and Gaussian process proxy model construction and verification, and in combination with Pearson correlation analysis, Monte Carlo propagation and Sober sensitivity calculation, a dominant parameter set and key interaction items are accurately recognized, and the accuracy and the reliability of the system are improved. And finally, solving the optimal low-carbon parameter combination by adopting a sequential quadratic programming algorithm under the engineering constraint. The system comprises twelve functional units such as a meteorological acquisition unit, a parameter definition unit and a simulation modeling unit, and outputs a parameter list which can be directly used for enclosure construction, unit type selection and photovoltaic arrangement. According to the method, scientificity and implementability of parameterization design of the tropical zero-carbon building are improved, annual net carbon emission can be reduced through actual measurement, and intelligent decision support is provided for the building double-carbon target.
Owner:SANYA SCI & EDUCATION INNOVATION PARK WUHAN UNIV OF TECH

DNA Sequencing Using Viterbi-Like Correlation Analysis

Example systems and methods for de novo sequencing of DNA or DNA-like sequences using Viterbi-like correlation analysis are described. A sequencing system receives the read data for multiple copies of a DNA strand from a sequence reader, such as a nanopore reader. The sequencing system generates a convolutional matrix based on one copy and a reference matrix based on another copy and uses them to generate a correlation matrix. A most likely path through the correlation matrix is determined to identify and correct errors between the two copies.
Owner:WESTERN DIGITAL TECHNOLOGIES INC

Carbon emission fine scale comparison method and system based on geographical weighted correlation analysis

The invention discloses a geographic weighted correlation analysis-based carbon emission fine scale comparison method and system. The method comprises the following steps of: acquiring carbon emission data released by different mechanisms in the same region under the same scale; carrying out attribute calculation on the carbon emission data released by different mechanisms to generate space panel data of different mechanisms; based on the generated space panel data, calculating correlation among the carbon emission data released by different mechanisms from a global perspective by adopting a Pearson's correlation coefficient; when the correlation calculated from the global perspective meets a first threshold value, the correlation coefficient between the carbon emission data released by different mechanisms is calculated from the local perspective through a geographical weighted correlation analysis method, and the first threshold value is a preset numerical value or a numerical value range. According to the method, the geographical weighted correlation coefficients among the carbon emission data issued by different institutions are compared, the correlation strength is judged from a fine scale, and reference is provided for selecting proper carbon emission data and more efficiently implementing a carbon emission reduction policy.
Owner:WUHAN UNIV