91 results about "Random projection" patented technology

The invention discloses a multi-source equipment health collaborative operation and maintenance method in a complex environment based on edge federation, and relates to the technical field of equipment collaborative operation and maintenance. Vibration acoustic emission current waveforms are mapped to a unified time-frequency grid at an edge gateway, and an encrypted sparse index is generated and uploaded; training a global model by combining a graph regular base network with a gradient direction and a distribution distance, and injecting fault information by using a new working condition protection door; after being issued by a sparse adaptation layer of double-temperature-zone distillation and random projection compression, fine adjustment is carried out on site under few samples through temperature gradual fusion and reversible orthogonal mapping, and only unit gradient direction and health labels are uploaded; the center adopts entropy constraint Bayesian filtering to fuse information to generate a health index, a maintenance schedule and a spare part plan are formed by integer programming according to confidence intensity mapping risk popularity, a result is differentially pushed and audited, and a closed loop of collection, learning, evaluation and decision is realized.

The invention provides a high-speed rail insulation joint health monitoring and early warning method and system, and relates to the technical field of joint health monitoring, and the method comprises the steps: carrying out the dimension reduction of resistance data and environmental influence factors through a random projection algorithm, carrying out the anomaly detection of the resistance feature data after the dimension reduction through an isolated forest algorithm, and carrying out the early warning. And through weight adjustment and path length optimization, a resistance abnormal point is marked. Using an empirical mode decomposition method to carry out constrained decomposition on the abnormal point data, and extracting multi-scale intrinsic mode function feature data; and performing resistance change trend prediction by using a Gaussian process regression model to obtain a resistance change prediction value and a confidence interval thereof. And inputting the predicted value and the confidence interval into a fuzzy reasoning model to obtain a graded early warning result of the high-speed rail insulated joint. Through multi-level data processing and analysis, the accuracy and reliability of fault early warning are improved, and safe operation of a high-speed rail steel rail system is ensured.

The invention relates to the technical field of data recognition, and discloses an abnormal data recognition method, device and equipment and a storage medium, and the method comprises the steps: extracting data distribution characteristics in each time window in a high-dimensional time series data stream, and carrying out the recognition of abnormal data based on the data distribution characteristics and an adjusted random projection matrix of the high-dimensional time series data stream; the method comprises the steps of generating dimension-reduced low-dimensional data, configuring local sensitive hash resolution parameters according to local volatility of the low-dimensional data, constructing a multi-resolution hash table, and identifying abnormal data points according to in-bucket data density of the multi-resolution hash table. According to the method, the dimension reduction process is adjusted by extracting the data distribution characteristics, the calculation complexity is reduced while key information is reserved, the multi-resolution hash table is constructed based on the local volatility of the dimension reduction data, adaptive analysis of different data areas is achieved, abnormal data points are identified according to the density of the data in the barrel, and the accuracy of the data in the barrel is improved. The dimension problem and the distribution change problem can be effectively solved, and the processing efficiency is improved while the detection precision is ensured.

The invention relates to the technical field of unmanned aerial vehicle signal transmission, and discloses an unmanned aerial vehicle signal transmission rate detection method and system.The method comprises the steps that a compressed sampling matrix is constructed through quantum random projection to reduce the signal dimension, and a quantum entanglement gate is driven based on attitude parameters to generate a dynamic sparse basis matrix; a federated learning framework is adopted to be fused with multi-node data optimization base parameters, rate detection is converted into combinatorial optimization solution in combination with a quantum annealing algorithm, and finally real-time adjustment of a modulation mode and transmitting power is achieved through closed-loop control. The innovation is embodied in a quantum compression sampling-federated optimization-annealing detection cross-domain cooperation mechanism, the defects of a traditional method in dynamic adaptability, calculation efficiency and anti-interference performance are overcome, and the method has the technical advantages of sparse representation space dynamic adaptation, quantum parallel acceleration optimization, multi-target parameter balance and the like. And the communication rate detection precision and link reliability of the unmanned aerial vehicle in a complex electromagnetic environment are remarkably improved.

The invention relates to the technical field of avionics and flight control, in particular to a multi-source fusion avionics control system and method, a multi-source acquisition and compression module synchronously acquires inertial measurement, star sensor and radar data under a unified time reference, and generates observation data through random projection compression; the fusion twinning module obtains a fusion state and a hypergraph based on compressed observation data, generates pneumatic, electromagnetic and structural twinning environments in real time on a shared three-dimensional grid through physical constraint diffusion, and outputs a registration result by adopting entropy regularization optimal transmission; the decision execution module maps discrete control variables quantified by a flight control computer into an Isinus model, obtains control sequence seeds through quantum annealing, generates a decision instruction through pulse sinus strategy network optimization, issues the decision instruction to a control execution unit to generate control execution data, and updates a hypergraph in combination with execution feedback for next cycle use. According to the method, the attitude estimation precision and the control robustness under the conditions of high maneuverability and strong interference are improved.

The invention provides a privacy protection advertisement monitoring method, system and device and a medium, and is used for solving the problem of effectively monitoring dynamically generated advertisement contents on the premise of protecting user dialogue context privacy in a generative artificial intelligence application. The method comprises the steps that firstly, an advertisement text and context information are obtained, and a first vector is obtained through semantic embedding processing; performing privacy protection conversion on the vector by adopting a random projection method to obtain a second vector, wherein the conversion can reduce the dimension and scatter semantic distribution; inputting the processed vectors into a pre-trained multi-dimensional analysis model to obtain real-time analysis results of content compliance, content correctness, emotional tendency, creativity quality and the like; and finally summarizing analysis results according to advertisement activities and outputting a report. According to the method, differential privacy noise can be selectively added, and a delivery decision is generated based on a multi-threshold judgment model. According to the invention, the privacy of the user is protected, and the advertisement content is efficiently monitored in real time.

The invention discloses a magnetic method data physical property inversion method and system based on a deep learning terrain disturbance layer, and relates to the technical field of geophysical exploration, and the method comprises the steps: building a magnetic anomaly data set, generating an underground three-dimensional magnetic anomaly model through a mixed hexahedron model and a terrain disturbance function, and obtaining corresponding magnetic anomaly data through forward modeling, each group of magnetic anomaly data corresponds to different terrain parameter combinations; constructing a deep learning inversion network model based on UNet; and training the deep learning inversion network model based on the magnetic anomaly data, taking the trained training set parameters as the weight of the deep learning inversion network, verifying the effect by using the verification set after the training is finished, and predicting the effect according to the test set. According to the method, a traditional same-dimensional random projection inversion method is combined with a deep learning network structure, and dynamic transformation of terrain parameters is realized by using a terrain disturbance layer, so that the network keeps high inversion precision and stability under different terrain fluctuation conditions.

The invention provides a music copyright credibility verification and circulation method, system and device and a medium, and belongs to the technical field of block chains. The method comprises the following steps: uploading an audio to a circulation platform, framing and windowing a smart contract, calculating short-time energy, and generating time domain hash through random projection hash; after windowing, an MFCC coefficient is extracted through Fourier transform, Mel filtering, logarithm compression and DCT, and after dimensionality reduction, frequency domain Hash is generated through locality sensitive Hash. And setting weights according to music types, splicing time domain and frequency domain Hash to obtain composite Hash, forming digital fingerprints by combining with copyright person biological characteristic Hash, and linking and binding songs and creator vouchers by taking copyright numbers as keys. Based on the digital fingerprint, a music copyright NFT token is generated by using an ERC-721 protocol, and a circulation NFT token is generated by using an ERC-1155 protocol. And when the copyright is checked, the target audio is uploaded to generate a digital fingerprint, infringement is judged by comparing the similarity, and a corresponding NFT token is inquired for evidence collection.

The invention relates to the technical field of e-commerce, in particular to a multi-merchant user behavior deep learning analysis method, which comprises the steps of collecting interaction data of each merchant end, calculating a gradient based on a local learning model, packaging slices and uploading the slices to a cloud end; aggregating gradients, constructing a behavior relation graph and generating a causal tensor, and inputting the causal tensor and the graph domain multi-scale features into a time sequence embedding model to obtain time embedding; generating commercial tenant high-dimensional pulse vectors through random projection and binary mapping, and aggregating the commercial tenant high-dimensional pulse vectors into cross-commercial tenant vectors; executing a generative reverse process on the cross-merchant vector according to a noise strategy to obtain a prediction vector; the prediction vector and time are embedded and mapped into an energy matrix, an action vector is sampled through quantum optimization, and the action vector and a cross-merchant vector are input into a reinforcement learning network to output a recommendation decision; and generating an update gradient according to user clicking and payment feedback, and returning the update gradient to the merchant end to form a self-calibration closed loop. According to the method, cross-merchant collaborative recommendation is realized on the premise of not exposing original data, and cold start recall and real-time conversion rate are improved.

The invention discloses a model fingerprint intellectual property protection method based on a frequency visual angle, and the method comprises the steps: extracting the frequency domain information of a model weight: S1, extracting a 3D array of a convolution kernel weight of a bottom convolution layer of a model, and obtaining a frequency domain coefficient through 3D discrete cosine transform (3DDCT); s2, the model owner extracts low-intermediate frequency components in the frequency domain coefficient according to a preset threshold value, and orderly connects the low-intermediate frequency components into a feature vector; s3, using a random projection technology to bind the feature vector and the identity information to generate a fingerprint, and submitting the fingerprint to a trusted third party (TTP) for timestamp verification; and S4, performing suspicious model detection: repeating the above steps on the suspicious model to obtain a feature vector, performing calculation by using an identity matrix of a model owner to obtain a fingerprint of the suspicious model, comparing the fingerprint with a fingerprint in a TTP database, and judging whether the suspicious model is pirated or not through cosine similarity. According to the method, the intellectual property protection capability of the model is effectively improved, and relatively high robustness is shown.

The steam generator state real-time monitoring method based on artificial intelligence belongs to the field of artificial intelligence and comprises the following steps: S1, data acquisition and labeling; S2, sample generation is performed by using a quantum generative adversarial network based on random projection embedding to realize data expansion; S3, the expanded data is input into a feature extraction model to perform training of the feature extraction model, and a five-layer fully connected neural network is used for feature extraction; S4, the feature-extracted data is input into a feature dimension reduction model to perform training of the feature dimension reduction model, and a self-encoding neural network algorithm based on local preserving projection is used to realize feature dimension reduction; S5, the dimension-reduced data is input into a classifier to perform training of the classifier model; and S6, steam generator state recognition and monitoring are performed.The steam generator state real-time monitoring method based on artificial intelligence can solve the problems of insufficient sample quantity and lack of data diversity and enhances the robustness of the model when the model has noise or fuzzy classification boundary data.

The invention relates to a distributed constraint optimization algorithm and system based on subgradient rescaling, and belongs to the technical field of information communication. According to the algorithm, for the distributed constraint optimization problem of the time-varying directed network, a time-varying directed graph meeting consistent joint strong connectivity and column randomness is constructed; initializing node variables; in each iteration, nodes transmit and receive variables and update the variables, and the variables and state variables are updated through a Polyak random projection technology; and repeatedly iterating to a stop rule, and outputting an optimal variable. The problem of imbalance of the time-varying directed network and the problem of complex constraint processing are solved, the calculation load is reduced, the problem of secondary optimization is avoided, the optimization efficiency is higher, and the application range is wider.

The invention discloses a sales supply chain management method and system based on Internet data, and relates to the technical field of supply chain optimization, and the method comprises the steps: carrying out the decomposition through discrete wavelet transform, calculating an approximate kernel distance through Gaussian random projection, generating low-dimensional embedding through low-rank decomposition and ADMM iterative optimization, and initializing the prediction demand of Poisson distribution. The method comprises the following steps: quantifying through a Shapley value, initializing a particle swarm, obtaining an individual and global optimal position, carrying out local guide search, outputting an optimal scheme through domain operation for updating, and generating an optimal logistics path and a scheduling scheme through SA disturbance and DE-GA variation. According to the method, the prediction precision is improved by introducing Poisson distribution and Shapley value quantification prediction requirements, an efficient logistics path and a scheduling scheme are generated through multi-target particle swarm optimization and a hybrid variation strategy, and the adaptability and the operation efficiency of a sales supply chain in a dynamic market environment are improved.

Machine learning models for spatial-temporal forecasting systems based on a multi-layer perceptron (MLP) model or other feedforward network can incorporate one or more random projection layers. Such models need not compute or rely on information representing relationships between different spatial nodes. In addition, the model can include temporal mixer layers that process time series data in the frequency domain, thereby leveraging the periodicity of many spatial-temporal data series.

The present invention relates to the technical field of near-infrared modeling data processing, and more specifically, to a near-infrared spectrum quantitative analysis dimensionality reduction method and system based on a random projection algorithm. The present invention includes: Step S1, obtaining near-infrared spectra x val samples and corresponding physical and chemical property values y val as a sample set; Step S2, dividing the sample set into a calibration set and a validation set, and calculating the average spectrum x avg ; Step S3, respectively preprocessing the near-infrared spectra x val and the average spectrum x avg to obtain a spectral matrix X val and an average spectral matrix X avg ; Step S4, performing random dimensionality reduction projection on the spectral matrix X val based on the Gaussian random projection algorithm to obtain a dimensionality-reduced spectral matrix X valRed ; Step S5, establishing an artificial neural network prediction model; Step S6, using the validation set to test the model; Step S7, performing quantitative analysis on the input near-infrared spectra and outputting corresponding predicted physical and chemical property values. The present invention does not require wavelength selection of the spectra, reduces the modeling difficulty, and shortens the modeling time.

The invention provides a seismic facies analysis method based on a random projection tree. The analysis method comprises the steps of 1, extracting seismic data needing to be processed according to a seismic data body and a horizon file; 2, selecting seismic layer attributes according to the seismic data; 3, carrying out the dimension reduction of the attributes of the seismic layer through employing a big data nonlinear dimension reduction method based on a random projection tree, and obtaining the attributes of the seismic layer after the dimension reduction; step 4, performing clustering according to the seismic layer attributes after dimension reduction by adopting SOM optimized by PSO to obtain a clustering result; and step 5, outputting a visualization result according to the clustering result. Nonlinear dimensionality reduction is carried out on seismic layer attributes by combining domain space search and a probability model, the method is more suitable for the nonlinear characteristic of seismic layer attribute data, and a scientific basis is provided for the oil reservoir exploration process.

The invention relates to a lightweight airborne visual tracking method and device based on random projection and a medium, belongs to the technical field of airborne computer vision and target tracking, and can reduce the calculation and storage cost of airborne platform feature processing, guarantee the target tracking precision and adapt to resource limited scenes. According to the invention, lightweight airborne visual tracking is realized based on locality sensitive hash (LSH) random projection, the method is suitable for resource-limited scenes of airborne platforms such as unmanned aerial vehicles and helicopters, and typical challenges such as target scale dramatic change, complex background interference and high-altitude high-angle shooting visual angle offset under airborne vision can be efficiently processed. The core requirements of an airborne system on low computing power occupation, low storage consumption and high real-time performance of a tracking algorithm are met; the LSH random projection technology is organically combined with an existing lightweight tracking architecture, on the premise that tracking precision is not remarkably lost, the calculation and storage cost of feature processing is further reduced, and the method becomes a constraint of breaking through airborne visual tracking resources-performance.

The invention relates to the technical field of information security, in particular to a federal data privacy protection method based on self-adaptive sparse homomorphic encryption, which comprises the following steps: firstly, carrying out local model training and calculating weight parameter difference at a client, and carrying out parameter block screening through a dynamic sparse proportion to generate a mask vector; only encrypting the reserved parameter block by adopting a CKKS homomorphic encryption algorithm, and generating a low-dimensional weight for contribution degree evaluation through random projection; and the server side calculates a contribution weight based on the cosine similarity of the projection weight and the historical accuracy, and completes weighted aggregation in a ciphertext state. According to the method, through a sparse-encryption-projection triple protection mechanism, the communication overhead is remarkably reduced while the model precision is ensured, the gradient leakage risk is effectively prevented, and the method is suitable for distributed modeling scenes of sensitive data of medical treatment, finance and the like.

The application discloses a medical image class incremental learning method and system based on feature principal direction guided projection, and belongs to the technical field of medical image analysis; the method acquires medical image features through a pre-trained feature extractor; random projection is performed on the features to obtain first-view features; a covariance matrix is calculated based on a feature cache area and is decomposed to extract the first K principal directions, construct a guided projection matrix, and obtain second-view features; the double-view features are spliced to obtain final representation; the classifier weight is directly calculated through a ridge regression closed-form solution without backward propagation training; the application adaptively captures the core structure of the feature space through data-driven principal direction projection, retains the detailed information in combination with random projection, effectively improves the feature separability of fine-grained classes, adopts an analytical classifier updating mechanism, realizes stable class incremental learning without storing historical data, improves the model updating efficiency, and is suitable for efficient continuous learning tasks in various medical image scenes.

Embodiments of the present application provide an alarm storm suppression method and device, computer storage medium and product. The alarm storm suppression method comprises: obtaining alarm data corresponding to an alarm storm; repeatedly randomly sampling the alarm data and constructing an isolation tree based on any preset segmentation method for the alarm data obtained in each sampling, wherein the preset segmentation method comprises a first preset segmentation method and a second preset segmentation method, the first preset segmentation method is to perform splitting based on a numerical feature and a preset segmentation threshold, and the second preset segmentation method is to perform splitting based on a random projection corresponding to a semantic feature; adjusting a path length of the alarm data in each isolation tree based on an alarm device topology weight corresponding to each alarm data, determining an anomaly score of the alarm data based on the adjusted path length; and determining alarm data with an anomaly score exceeding a preset anomaly score threshold as core alarm data. According to the method provided by the embodiments of the present application, the efficiency and accuracy of alarm positioning are improved.

The application discloses a magnetic data physical property inversion method and system based on a deep learning terrain disturbance layer, relates to the technical field of geophysical exploration, and comprises the following steps: establishing a magnetic anomaly data set, generating an underground three-dimensional magnetic anomaly model by mixing a hexahedron model and a terrain disturbance function, and obtaining corresponding magnetic anomaly data by forward calculation, wherein each group of magnetic anomaly data corresponds to different terrain parameter combinations; a deep learning inversion network model based on UNet is constructed; the deep learning inversion network model is trained based on the magnetic anomaly data, the trained training set parameters are used as the deep learning inversion network weight, the effect is verified by using a verification set after the training is completed, and the prediction effect is predicted according to a test set. The application combines a traditional same-dimension random projection inversion method and a deep learning network structure, realizes dynamic transformation of terrain parameters by using a terrain disturbance layer, and enables the network to maintain high inversion precision and stability under different terrain undulation conditions.

The invention discloses a distributed sparse model fingerprint method based on dual-key driving, and the method comprises the following steps: inputting an original model, an owner secret key and an identity label into a computer system; generating a seed based on an owner secret key, calculating a global index set in one or more stable target convolution layers pre-selected in the model, and selecting a weight subset as a fingerprint carrier; constructing a random projection matrix based on the identity label; the weight vector and the random projection matrix generate an original model fingerprint; verifying the suspicious model, repeating the steps to obtain a fingerprint to be detected, and calculating the cosine similarity between the original model fingerprint and the fingerprint to be detected; and judging whether an illegal derivative relationship is formed based on a calibrated threshold value, and outputting an ownership judgment result. According to the method, identity and pseudo-random processes are bound through double keys, and distributed sparse sampling and normalized random projection are combined, so that the uniqueness and robustness of fingerprints are improved, various attack scenes can be effectively resisted, and the ownership of the model is accurately judged.

The application discloses a kind of based on big language model's evolvable software vulnerability detection method, comprising: by regular pattern matching identification Source sentence, based on call graph traversal and data dependence analysis execution function level inter-process slice, build cross-function code context, input the big language model of parameter efficient fine-tuning, output the vulnerability propagation path from Source to Sink;When new vulnerability type needs to be extended, the parameter variation characteristics of old data are extracted by multi-step fine-tuning, and the representative core set is selected by random projection dimension reduction and hybrid distance hierarchical clustering, and the training is played back by mixing new data to alleviate catastrophic forgetting;In the actual use process of tool, the false alarm and the false alarm confirmed by user are collected as feedback signal, the core set is clustered and layered filtered and refined based on perplexity and error prediction analysis, the harmful old knowledge that leads to false alarm and false alarm is removed, and verified new mode is supplemented at the same time, to realize the closed-loop evolution of self-improvement.

This invention relates to the field of wind and solar power engineering construction and ecological restoration technology, and discloses a method and system for gravel curtain layer restoration based on multimodal data fusion. The method includes the following steps: acquiring multimodal data including natural environment, engineering disturbance, and remote sensing data, and independently encoding them into feature vectors of a unified dimension; constructing a bidirectional cross-modal attention mechanism to fuse natural environment and engineering disturbance features; constructing a sequence by combining the fused features and remote sensing features, and inputting it into a multi-head self-attention network for joint modeling; extracting high-order features through random projection expansion and third-order interactive operations, and inputting the extracted features into a residual feedforward discrimination network to output the damage level; and matching and outputting restoration schemes from a pre-built scheme library based on environmental and engineering constraints. This invention achieves structured fusion of multi-source information and intelligent decision-making, improving the accuracy and engineering adaptability of gravel curtain layer restoration.

The invention discloses a network security situation awareness method based on deep learning, and the method comprises the following steps: carrying out the unified structure processing and time alignment of multi-source data, and generating a standardized high-dimensional sample; constructing a disturbance sample set through disturbance sampling, executing low-dimensional embedding by utilizing multiple groups of orthogonal random projection functions, and generating a disturbance embedding matrix; constructing a stability map based on the disturbance path similarity between the samples; constructing an attack type coding matrix by adopting an error correction output coding model and training a plurality of binary sub-classifiers to realize robust multi-class attack recognition; and finally, outputting an optimal attack type label through the ECOC model, and generating a network security situation map in combination with the map. Aiming at the problems of low data processing efficiency and weak identification capability of a multi-source heterogeneous network, the invention provides a situation modeling path fusing disturbance sampling, random projection and an ECOC model.

The application discloses a kind of based on random projection's physical property parameter inversion method of potential field data, comprising the following steps: S1: measured potential field data is obtained, according to survey area and depth range is profiled in underground space, sensitivity matrix in inversion is calculated based on potential field data forward theory, and then the forward calculation relationship of full space is established;S2: random projection matrix is designed, and sensitivity matrix is projected to multiple low-dimensional subspace, and the subspace forward calculation relationship is established;S3: based on the regularization equation of subspace forward calculation relationship, and the physical property parameter in subspace is solved using conjugate gradient algorithm;S4: the final physical property parameter inversion result is obtained by the weighted average calculation of multiple physical property parameters in subspace.The physical property parameter inversion method of potential field data based on random projection has higher depth resolution and inversion reliability, and improves the practicability of physical property inversion method in actual data processing.

The invention belongs to the technical field of fault diagnosis, and discloses a double-path incremental fault diagnosis method fusing an attention mechanism and a prototype, and the method comprises the steps: designing a double-branch network, and carrying out the division of labor through a heterogeneous network: extracting a time domain feature through a Hu moment-based convolutional neural network, extracting a frequency domain feature through a scale invariant feature conversion-based convolutional neural network, and carrying out the classification of the time domain feature and the frequency domain feature; the time domain branch network captures the global features of the operation trend of the equipment, and the frequency domain branch network extracts the local features of abnormal signals of a specific frequency band to form a time-frequency complementary feature space, thereby achieving the comprehensiveness of feature coverage. Considering that local frequency domain features of a high frequency band are generally more sensitive to early faults and time domain global features can visually reflect the overall operation state, an attention mechanism is introduced to realize adaptive distribution of weights, and the accuracy of feature extraction is further enhanced. Random projection is adopted to increase feature dimensions, the linear separability of features is improved, the problem of category overlapping in a low-dimensional feature space is solved, and category boundaries are expanded.

The invention relates to the technical field of natural language processing, in particular to a model prefix parameter and hyper-parameter joint optimization method and system. Comprising the following steps: S1, acquiring a high-dimensional prefix parameter and hyper-parameter joint optimization instruction; s2, generating a random projection matrix, and mapping the high-dimensional prefix parameters into low-dimensional prefix parameters through the projection matrix; s3, searching an optimal low-dimensional prefix parameter in a low-dimensional space through a covariance matrix adaptive evolution strategy, reconstructing the low-dimensional prefix parameter into a dynamic high-dimensional MLP parameter, generating a key-value prefix required by each layer of the model, and embedding and injecting the key-value prefix into the large model; s4, training hyper-parameters are dynamically adjusted based on a particle swarm algorithm and a cosine annealing strategy, and the hyper-parameters are transited step by step in the training process; s5, training the model based on the optimal prefix parameter and the hyper-parameter, and outputting the trained model; and S6, applying the trained model to the medical question and answer task. According to the method, the precision and stability of prefix tuning in the medical question and answer task can be improved.

The present invention discloses a small sample classification method and device based on a random projection metric space, relating to the field of natural language processing technology. The method comprises: obtaining multiple tasks to be classified; inputting the multiple tasks into a classification model based on the random projection metric space; and obtaining classification results for the multiple tasks based on the multiple tasks and the classification model based on the random projection metric space. The present invention constructs a random metric space adapted to specific tasks, constructs a metric space based on task features by fine-tuning the position of sample vectors in the metric space, and specifically uses random vectors to learn the metric space for each task, thereby resolving the problem that the general practice of using a universal metric space is not well suited for all tasks and lacks applicability.

The present invention discloses a continuous financial fraud detection method based on dynamic feature space transformation, belonging to the technical field of financial fraud detection, including: obtaining the features of transaction samples; dynamically adjusting the target dimension of random projection according to the data volume to perform dynamic feature space transformation; constructing an adaptive spherical decision boundary, and adapting to new data through a centroid calculation and radius update mechanism; performing financial fraud detection according to the decision boundary. Through dynamic feature space transformation, when there is sufficient data, the feature space can be automatically expanded to capture more complex patterns; when the data is scarce, overfitting of the detection model can be avoided by compressing the feature space, improving the generalization ability of the model and maintaining good detection performance on new data. At the same time, updating the centroid of the normal transaction samples according to the newly added transaction samples and dynamically adjusting the radius of the spherical decision boundary can continuously adapt to the financial dynamic detection scenario, effectively reducing the interference of data noise and outliers.