266 results about "Anomaly detection algorithm" patented technology

Embodiments disclosed herein can significantly optimize a root cause analysis and substantially reduce the overall time needed to isolate the root cause or causes of service degradation in an IT environment. By building on the ability of an abnormality detection algorithm to correlate an alarm with one or more events, embodiments disclosed herein can apply data correlation to data points collected within a specified time window by data metrics involved in the generation of the alarm and the event(s). The level of correlation between the primary metric and the probable cause metrics may be adjusted using the ratio between theoretical data points and actual points. The final Root Cause Analysis score may be modified depending upon the adjusted correlation value and presented for user review through a user interface.

The invention discloses a warning and responding system used for intranet network attack detection. The system comprises a management center, a detecting machine and a database. The management center is used for configuring and amending each parameter of the detecting machine, receiving and storing warning message sent by the detecting machine and inquiring the state of the detecting machine. Anomaly information detection is carried out on an intranet network by an anomaly detection algorithmic module of the detecting machine, the anomaly detection algorithmic module obtains anomaly detection information and confirms the reliability of the information. When the reliability of the anomaly detection information reaches a preset value, the warning message is sent. The isolation time and the isolation form of an IP address generating the anomaly detection information are confirmed according to the warning message, and the IP address is isolated. The IP address that the isolation time reaches the preset value is released from isolation. The method can detect and prevent the attack from an intranet mainframe to outer net or other intranet mainframes exactly and effectively in time.

An automatic detection method and a system for human body falling-over are based on a wireless network signal transmission technology. The method comprises the following steps: a wireless receiving terminal receives wireless signals from a wireless transmitting terminal and assesses channel state information; abnormity of the channel state information change is identified by using an abnormity detection algorithm; based on a one-class support vector machine which distinguishes a target motion kind from other motion kinds, an abnormity mode that a human body falling-over motion leads to a channel state information change is set as the target motion kind to determine whether a human body falling-over motion happens; if the human body falling-over motion happens, a falling-over alarm signal is emitted. The false alarm rate of the detection method provided by the invention is low; by utilizing a present wireless network and a device, other specific detection devices are not needed, and the detection method is high in universality; and at the same time people to be detected do not need to carry any extra sensing equipment, and inconvenience caused by that people to be detected carry detection equipment is avoided.

An image capture system for capturing images of an object, the image capture system comprising a moving platform such as an airplane, one or more image capture devices mounted to the moving platform, and a detection computer. The image capture device has a sensor for capturing an image. The detection computer executes an abnormality detection algorithm for detecting an abnormality in an image immediately after the image is captured and then automatically and immediately causing a re-shoot of the image. Alternatively, the detection computer sends a signal to the flight management software executed on a computer system to automatically schedule a re-shoot of the image. When the moving platform is an airplane, the detection computer schedules a re-shoot of the image such that the image is retaken before landing the airplane.

Systems and computer-implemented methods include a validation phase in which validation projects are submitted to an online crowdsourcing system. The validation projects each have different combinations of the two validation control parameters, payment per human intelligence task (“HIT”) and number of solutions per HIT. By analyzing the solutions for the validation projects, final control parameters can be selected from the validation project having the best combination of high quality, low cost, and short time to completion. The final control parameters can be submitted along with a final project to the online crowdsourcing system. In addition, a novel outlier detection algorithm enables the system to detect outlier workers based on the distribution of non-experts' agreement probabilities, reject outlier workers' results, and thus save labeling cost.

The invention belongs to the technical field of communication control and communication processing, and discloses an isolated forest-based binary classification abnormal point detection method and aninformation data processing terminal. The method comprises the steps of carrying out initial static average blocking on an original data set, and calculating the density in the block and the mean density; after calculating the density in each block of the static block, reducing the data set by taking the mean density of the original data set as a threshold value; constructing an isolated forest byusing a node recursion method; performing corresponding feature extraction and datamation on the original data set, and calculating the spatial position distances between the clustering center pointand other points; adding the abnormal score calculated on the basis of the density and the distance and the abnormal score calculated on the basis of the proof information and comparing with a corresponding threshold value. According to the method, the accuracy of an abnormal point detection algorithm is effectively improved, the actual data size in the abnormal detection process can be greatly reduced, the calculation resources are saved, and the abnormal detection efficiency is improved, and the robustness of an abnormal detection algorithm is enhanced.

The invention discloses a log stream anomaly detecting method. The method comprises the steps of utilizing a detecting model to perform anomaly detection on log stream to be detected and judging whether the log stream to be detected is abnormal or not according to detection results, wherein the detecting model is obtained by training an initial model according to training log stream and an anomaly detecting algorithm; if the log stream to be detected has anomaly, judging whether the anomaly is a known threat or not; if the anomaly is not the known threat, updating the detecting model according to received anomaly rechecking information. The method can recognize the anomaly in the log stream and autonomously learn the new anomaly, not only recognizes the known threat, but also can learn unknown events and improves safety of a network environment. The invention further discloses a log stream anomaly detecting system which also has the beneficial effects.

Disclosed is a method for evaluating a health status of mechanical equipment. Firstly, status data of main components on mechanical equipment are collected by a sensor, and feature extraction is performed to obtain feature parameters. Then, noise data and fault data are extracted by an outlier detection algorithm, and only the fault data are retained. Subsequently, dimension reduction processing is performed to obtain a feature vector for final evaluation. Finally, equipment status evaluation is performed, a self-organizing map neural network model is established by health status data and failure status data, rate impact factors of each group of data to be evaluated are calculated by an entropy weight theory, and the rate impact factors are introduced into a neural network to perform health factor calculation. The present invention implements overall status evaluation for mechanical equipment, provides a basis for health maintenance of the mechanical equipment, and avoids unnecessary economic losses.

The invention discloses a web business abnormality detection method. The web business abnormality detection method comprises the following steps: extracting a plurality of feature values of an access behavior in an HTTP log, and generating a feature vector; calculating an abnormal index of the feature vector according to a pre-established abnormality detection algorithm model; determining whether the abnormal index goes beyond a preset threshold value range; and if the abnormal index goes beyond the preset threshold value range, determining the access behavior corresponding to the feature vector to be abnormal. According to the method, by extracting and analyzing the feature value of an access record in the HTTP log, the abnormal behavior can be detected without a rule base, so that the detection capacity for an unknown type of abnormal behavior can be effectively improved. The invention also discloses a web business abnormality detection apparatus which has the same beneficial effects.

The invention discloses a video abnormity detection method based on a graph structure under multi-scale transformation. First of all, video abnormity detection is carried out by use of an optical flow feature, and spatial correlation scales of video abnormity association optical flow features in different scenes are different. Under the condition that the spatial correlation structure of the video abnormity association optical flow features is maintained, since the calculation efficiency of video abnormity detection can be effectively improved by reducing the quantity of the optical flow features, it is brought forward that a network graph structure of the optical flow features is constructed based on spatial correlation, by use of multi-scale transformation of the graph structure under correlation constraints, the quantity of the optical flow features in the video abnormity detection is effectively reduced, under the condition that the detection precision is slightly reduced, the calculation efficiency of a video abnormity detection algorithm can be substantially improved, and detection of event abnormities is more rapid and reasonable.

The invention discloses a noise diagnosis algorithm for rolling bearing faults of rotary equipment. Firstly, a sound pick-up device collects running noise signals of a rolling bearing, and the signalsare subjected to preliminary fault judgment through a bearing normality and anomaly pre-classification model based on an anomaly detection algorithm; secondly, according to a fault pre-judgment result, the abnormal signals (the faults occur) pass through a neural network filter to filter normal components in the signals of the bearing, the output net abnormal signals are connected to a subsequentfeature extraction module, and the normal signals (no faults occur) are directly connected to the feature extraction module; the feature extraction module extracts Mel-cepstrum coefficients (MFCC) ofthe signals to serve as eigenvectors, feature reconstruction is carried out by utilizing a gradient boosted decision tree (GBDT) to form composite eigenvectors, and principal component analysis (PCA)is used for carrying out dimensionality reduction on features; and finally, feature signals are input into an improved two-stage support vector machine (SVM) ensemble classifier for training and testing, and at last, high-accuracy fault type diagnosis is achieved. According to the algorithm, the bearing faults can be effectively detected and relatively high fault identification accuracy is kept;and the algorithm has relatively high effectiveness and robustness for detection and classification of the bearing faults.

The invention provides an improved local anomaly factor algorithm-based topology identification method. The method comprises the steps of firstly, based on the statistical theory, acquiring the operating state change information of a to-be-predicted device object, such as a switch, a disconnecting link or the like; secondly, according to the acquired data, modeling a to-be-identified data object, and respectively establishing an object set for each device object, wherein the object set represents the operating state change condition of the device object within a certain period of time; thirdly, based on the grid reduction theory in the GDLOF algorithm, reducing data objects in the object set to reduce identification objects and improve the efficiency of the algorithm; fourthly, for non-excluded data objects, subjecting each attribute of each object to weighted treatment by adopting a relative entropy in considering different influences of the telemetry and remote signaling information on topology error identification. In this way, the reliability and the execution efficiency of the algorithm are improved, and the identification topology error of a local anomaly factor is finally confirmed. According to the technical scheme of the invention, the density-based anomaly detection algorithm is applied to the topology error identification of the power grid, so that the application field of the anomaly detection algorithm is expanded. Meanwhile, the topology error problem of the power grid and the identification problem of telemetry bad data in the prior art are solved at the same time.

The invention discloses an SAM weighted KEST hyperspectral anomaly detection algorithm (SKEST). The method includes the steps: firstly, deducing the SKEST algorithm; and secondly, calculating the SKEST value of each image element in a hyperspectral image by the aid of a double-rectangular window, performing threshold segmentation and detecting abnormal points. In the SKEST algorithm, based on the KEST (kernel Eigen space separation transformation) algorithm, a weight factor is introduced into each sample in a DCOR (difference correlation) matrix of a high-dimensional Eigen space detection point neighborhood by means of SAM (spectral angle mapper) measurement, and the weight factor of each sample depends on an included angle between the spectral vector of the sample and a data center of the detection window. Therefore, abnormal data in the detection window are suppressed, the contribution of main compositional data is highlighted, and the DCOR matrix can more effectively describe target and background data distribution difference. Besides, the SAM is robust to spectral energy, and by the aid of a radial basis function, the SKEST algorithm considers both spectral energy difference and spectral curve shape difference of signals, and accordingly conforms to hyperspectral data characteristics more effectively.

The embodiment of the invention provides a user account abnormity detection method based on time sequence characteristics, and the method comprises the steps: building a time sequence abnormity detection algorithm model with a plurality of characteristic dimensions according to the historical record data of a user account; Obtaining current data of a user account, and according to the plurality ofanomaly detection algorithm models, respectively carrying out anomaly detection on the current data from the plurality of feature dimensions to obtain scores of the current data in the plurality of feature dimensions; Taking the average value of the scores of the plurality of feature dimensions as a comprehensive abnormal score of the current data; And when the comprehensive abnormal score is greater than a preset score threshold, judging that the user account is an abnormal user account. According to the technical scheme, dynamic behavior changes of a user are captured through user account evaluation based on a time sequence model and abnormal feature set matching based on association rule analysis, and the accuracy and interpretability of abnormal account detection in practical application are improved.

The invention discloses a network security anomaly detection algorithm based on a clustering graph neural network. The algorithm comprises the following steps: describing a network topology structureby using a graph model, optimizing node characteristics by using a graph neural network convolution layer, segmenting a graph into a plurality of disjoint sub-graphs by using a graph clustering algorithm, regarding each sub-graph as a node, regarding an adjacency relationship of the sub-graphs as an edge, forming a sub-graph, learning a weight for each node by utilizing a graph attention layer, performing weighted summation on features of all nodes in each sub-graph to form features of the nodes in the sub-graph, and finally judging whether a network is attacked or not by utilizing a full connection layer and a classifier layer. According to the method, a hierarchical graph neural network is constructed, node features in a graph are optimized through a graph convolution layer, local features on the graph are captured through a pooling layer based on a graph clustering algorithm, high-level semantic features are generated, situation features of the whole network are generated through afusion layer, and network situations are classified through a classifier.

The invention relates to an Internet of Things malicious traffic detection method based on a fog computing platform, and the detection method is operated based on the fog computing platform, and comprises the steps: (1) building an experimental network, and building a feature extraction module which is used for collecting a traffic data packet of IoT equipment under jurisdiction; building a Miraibotnet environment, and obtaining a traffic data packet when a DDoS attack is initiated; (2) performing feature value classification and extraction on the traffic data packet by using a feature extraction module to generate feature data; (3) by a data processing module, performing data dimension reconstruction on the feature data; and (4) building a convolutional neural network on the fog computing node. According to the method, the convolutional neural network anomaly detection algorithm is transplanted to the field of IoT botnets, so that the identification rate of DDoS malicious traffic ofIoT equipment is improved; based on fog computing platform architecture construction, real-time detection of abnormal traffic of IoT equipment under jurisdiction is realized, and consequences of DDoSattacks are reduced.

The invention relates to an information processing technology, and discloses a gesture recognition system based on RFID (radio frequency identification devices). The gesture recognition system comprises an RFID signal information acquisition module used for receiving a wireless signal from a reader by a transponder, and preprocessing an RFID signal; an anomaly detection and extraction module used for using an anomaly detection algorithm to recognize and extract abnormal changes of RFID signal state information; an action recognition module used for recognizing a gesture action by taking an abnormal segment caused by the gesture action as a target action class based on a matching algorithm; and a response recognition module used for executing a meaning that the gesture represents when recognizing a target gesture action. The gesture recognition method and system based on the RFID provided by the invention have the following beneficial effects that the universality is very high, and people subjected to detection do not need to carry any extra equipment, so that the inconvenience caused by carrying detection equipment by people subjected to detection can be avoided.

The invention discloses a data anomaly correction method in an atmospheric monitoring system. The method uses a minimum-maximum normalization method to preprocess feature data, and then combines the historical data of the node with the first-level anomaly detection algorithm based on information entropy to calculate The abnormal probability of the sensor node is obtained. When the abnormal probability of the node is higher than the threshold, the second level of abnormal detection algorithm based on K-means is executed to obtain the feature vector of the adjacent nodes of the node, and the clustering of the node and the adjacent nodes is performed. , calculate the distance between the node feature vector and the cluster center based on the clustering results, and judge whether the sensor node is normal or not. The method of the invention can detect the data collected by the sensor, and can also detect the abnormality occurring in the data transmission path of the atmospheric monitoring system, and can improve the data accuracy of the atmospheric monitoring system.

An express and logistics distribution anomaly detection method is used to quickly and effectively discover the abnormal distribution conditions of delivery time delay, process error (detour), end point error (non-delivery of the correct destination) and so on in the distribution process. The method comprises steps of analyzing the multi-attribute characteristic of the express and logistics distribution trajectory data, proposing a method combining ideals of the distance and angle-based anomaly detection algorithms to measure the abnormal degree of each trajectory sub-segment; converting detection of the delivery time delay into detection of the average speed of the delivery process; and detecting the distribution end point error by using the position coordinates, city number, city level and other attributes of the trajectory data. With the method, it is possible to quickly and accurately discover the abnormal distribution of the express and logistics, timely feedback to the logistics enterprise for processing, reduce the economic loss, and create the conditions for improving the competitiveness of the logistics enterprise.

The invention relates to an electric power data parallelization anomaly detection method based on a MapReduce. The method comprises the following steps that first, electric power data anomaly characteristics are defined by a grid company according to the operation feature of an acquisition system and expert historical experience before, and accordingly an anomaly detection algorithm is established; second, a cluster calculation model is established; third, when processing data arrive, a Master node of the cluster calculation model starts a data anomaly detection task and distributes the calculation task to all Slave nodes in a relatively even mode; fourth, all the Slave nodes conduct anomaly detection calculation according to the task distributed by the Master node and the anomaly detection algorithm established in the step S01; fifth, the Master node outputs abnormal data according to the calculation of all the Slave nodes. By means of the electric power data parallelization anomaly detection method based on the MapReduce, the problem that the calculating and analyzing efficiency is low under the background of a huge quantity of electric power data in the prior art can be solved, and a forceful guarantee is provided for improving power grid efficiency and reducing loss.

The invention discloses a transformer substation environment anomaly detection system, method and device. The transformer substation environment anomaly detection system comprises a front-end video acquisition module, a network transmission module, a monitoring management center, an anomaly alarm module and a data storage module, wherein the front-end video acquisition module comprises a network camera with an intelligent detection function, an intelligent algorithm module is integrated in the network camera, the intelligent algorithm module adopts an unsupervised anomaly detection algorithm based on generative adversarial learning, and the intelligent algorithm module is used for quickly detecting the anomaly of the surrounding environment of the equipment. According to the invention, thenetwork camera with an intelligent detection function is adopted to carry out anomaly detection on the collected environment information, and only picture information which may have anomaly is output, so that data transmission is facilitated. Compared with a traditional abnormal target detection algorithm, the method has better robustness and adaptability, has the advantages of being uninterrupted and timely, reduces the probability of missed detection and untimely discovery of manual monitoring, and reduces the potential safety hazard of a transformer substation.

The invention belongs to the technical field of pantograph structure anomaly detection, discloses a pantograph structure abnormity detection algorithm based on image processing. The method comprises an image preprocessing step, a pantograph positioning step, a pantograph contour extraction step, a key contour extraction step, a key point extraction step and a parameter calculation and abnormity judgment step. Positioning a pantograph image contained in the to-be-identified image subjected to the image preprocessing step by adopting an HOG + SVM method; the pantograph structure abnormity detection algorithm provided by the invention has good adaptability to images with complex backgrounds, uneven illumination, noise and the like, is high in algorithm detection accuracy, and improves the detection efficiency of pantograph structure abnormity faults.