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303 results about "Passive detection" patented technology

Network mapping behavior anomaly detection method and system based on machine learning

A network mapping behavior anomaly detection method and system based on machine learning is provided. The method includes: collecting dual-source traffic data, generating a structured log data set through dual-source log fusion engine; performing subgraph matching calculation to obtain a mapping behavior deviation degree; generating communication data containing a watermark identifier in a session corresponding communication path; verifying whether attack events carry the watermark identifier; generating a network mapping behavior anomaly detection report. According to the disclosure, an adaptive attack behavior model is constructed through a multi-modal feature vector based on structured logs and a graph protocol mapping rule base, so that the cognitive robustness to protocol camouflage and path drift is fundamentally enhanced, a real-time verification chain of detection results is built, and traditional passive detection is transformed into self-proof active defense through cross verification of watermark carrying state and behavior trajectory.
Owner:HUANENG INFORMATION TECH CO LTD

Backlight effect image edge enhancement method based on intelligent identification

The invention relates to the technical field of image processing, and discloses a backlight effect image edge enhancement method based on intelligent identification, which comprises the following steps of: judging a field environment type; performing global optimization on the original image based on a set environment perception type enhancement mechanism according to the judged field environment type, and outputting a global pre-processing image; constructing a backlight area segmentation model for the globally preprocessed image; outputting a local enhanced image; designing a structure perception type local adaptive threshold algorithm for the local enhanced image, and outputting a binary image keeping structural continuity; extracting an edge image of the binarized image through an edge detection algorithm, and optimizing a topological structure of a contour in the binarized image; and comparing with a wood template processing standard feature library, outputting an edge quality evaluation result and feeding back to a processing control system. Defect detection and machining control depth linkage is achieved, passive detection is changed into active optimization, and the production efficiency and the yield are improved.
Owner:四川省建筑机械化工程有限公司

Wireless anti-interference signal detection method and device, equipment and storage medium

The invention relates to the technical field of wireless signal detection, and discloses a wireless anti-interference signal detection method, device and equipment and a storage medium, and the method comprises the steps: collecting a standardized interference feature vector through a multi-scene wireless signal receiving device; performing interference feature enhancement processing on the standardized interference feature vector to obtain an interference feature sample set; constructing a dual-array cooperative detection system comprising a passive detection array and an active detection array, and performing real-time monitoring to obtain dual-path interference signal monitoring data; performing spatial domain and time-frequency domain dual feature extraction and fusion processing on the dual-path interference signal monitoring data to obtain a comprehensive interference feature; the receiver filtering parameter matrix and the detection threshold vector of the double-array cooperative detection system are dynamically adjusted according to the comprehensive interference characteristics, the method can adapt to changes of different interference environments in a self-adaptive mode, comprehensive coverage of communication spectrums is achieved, and the wireless anti-interference monitoring range and the spectrum sensing capacity are greatly expanded.
Owner:SHENZHEN BID WINNING INT INSPECTION TECH CO LTD

Sensitivity integration method and system, electronic equipment and storage medium

The invention provides a communication and sensing integration method and system, electronic equipment and a storage medium. The method comprises the following steps: under the condition that a target object needs to be sensed, detecting the target object based on a passive detection technology to obtain a detection distance of the target object; and determining a target signal transmission mode adapted to the detection distance for sensing. And according to the target signal transmission mode, performing communication processing based on the target antenna in the communication time slot, and performing sensing processing based on the target antenna in the sensing time slot. Based on the scheme of the application, communication and sensing functions can be realized only by deploying a set of target antennas, so that spectrum and hardware resources are saved. In addition, in the sensing process, the signal transmission mode is adapted according to the detection distance of the target object determined by the passive detection technology, and the sensing precision for the target object can be improved. Meanwhile, the passive detection technology can assist in locking the target object in the sensing process, and the blind area possibly caused by switching the signal transmission mode of the target antenna is made up.
Owner:ZTE CORP

Concrete defect state recognition and passive detection combined control method under super-tonnage block type spherical hinge

The invention relates to the technical field of concrete defect identification, and discloses a concrete defect state identification and passive detection combined control method under a super-tonnage block type spherical hinge, which is used for solving the problem that defect prediction cannot be realized during concrete defect identification, and comprises the following steps: setting sampling points in a concrete structure in a layered manner, acquiring strain monitoring data of each sampling point, judging whether the sampling points have defects or not, if so, performing grouting repair intervention treatment, if not, acquiring risk parameters of concrete defects, and evaluating according to the risk parameters to obtain defect risk indexes; whether the sampling points have the risk of concrete defects or not is judged, if the sampling points have the risk of concrete defects, early warning and vibration equipment parameter adjustment are carried out on the sampling points according to the defect risk indexes, the structure quality safety and the construction efficiency are effectively improved, and the engineering field intelligent management and control degree is improved.
Owner:WUHAN TENGQIAO ENG CONSULTING CO LTD

Unmanned aerial vehicle long-distance tracking system based on distributed optical fiber vibration sensing

The invention belongs to the technical field of distributed optical fiber sensing and low-altitude security and protection, and particularly relates to an unmanned aerial vehicle long-distance tracking method based on distributed optical fiber vibration sensing. The invention relates to an unmanned aerial vehicle vibration / electromagnetic fusion multi-mode identification method, a special installation formation design, a dispersion compensation and amplitude phase error compensation design, an unmanned aerial vehicle target vibration / electromagnetic fusion multi-mode identification design, a detection capability calculation method of an unmanned aerial vehicle vibration sound pressure-space attenuation law-distributed optical fiber processing equipment detection capability coupling model, a long-distance sensing optical cable and an electromagnetic monitoring node. According to the tracking method, a special optical fiber installation mode, dispersion compensation and phase error compensation of an original phase signal, a vibration / electromagnetic fusion multi-mode identification method, an unmanned aerial vehicle vibration sound pressure-space attenuation model-distributed optical fiber processing equipment detection capability corresponding method and other innovative work are adopted; a mature distributed optical fiber vibration sensing system is utilized to realize long-distance passive detection and target tracking of the low-slow-small unmanned aerial vehicle.
Owner:INST OF ENG PROTECTION NAT DEFENSE ENG RES INST ACAD OF MILITARY SCI CHINESE PEOPLES LIBERATION ARMY

Heavy ion track positioning method suitable for tiny seeds

The invention relates to the technical field of particle track microscopic analysis, in particular to a heavy ion track positioning method suitable for tiny seeds. The method mainly comprises the following steps of: scanning biological stacks by using a scanner, processing a scanning image by using drawing software to obtain an image of a single seed hole, acquiring position information of seeds in the seed holes, scanning a CR39 detection sheet by using a VHX microscope, acquiring passive detection information of each seed hole, and superposing the passive detection information with the image processed by the drawing software to obtain a final detection result. The radiation detection condition at the arabidopsis thaliana seeds is analyzed, and data conversion is further carried out to obtain various radiation information of individuals aiming at the arabidopsis thaliana seeds. The method is applicable to batch, rapid and high-precision processing of returned detection piece data. And in the aspect of the batch degree, the whole process is batch processing, and batch pictures and data can be automatically output by utilizing related software, so that the manual participation degree is reduced.
Owner:DALIAN MARITIME UNIVERSITY

Tool clamp for integral welding of multiple accessories

The invention relates to the field of automobile part welding processing, in particular to a tool clamp for integral welding of multiple accessories, the tool clamp comprises a jig frame, a clamp and a detection device, the jig frame is used for placing and positioning the accessories, the clamp is rotatably connected with the jig frame, the clamp is used for fixing the accessories in the jig frame, and the detection device is arranged on the jig frame. The detection device is used for detecting the position of the accessory and controlling the welding robot to conduct welding. The detection device comprises a direct detection device and an indirect detection device, the direct detection device is used for directly detecting the position of the part, the indirect detection device comprises an active detection device and a passive detection device, the passive detection device is connected with the clamp, and the passive detection device is used for detecting the position of the part along with rotation of the clamp; the active detection device is fixedly connected with the jig frame and is driven by the power source to detect the positions of the parts, and the effect of reducing the reject ratio of automobile part welding finished products is achieved.
Owner:TIANJINSHI SUNWAY MOULD CO LTD

Energy-saving door and window machining manipulator device

The invention relates to the technical field of energy-saving door and window machining, and particularly discloses an energy-saving door and window machining manipulator device which comprises a manipulator, a first guide rod, a recording mechanism and a clamping jaw. The recording mechanism is arranged at the top end of the right side of the mechanical arm, and the clamping jaw is arranged at the right end of the recording mechanism. The device effectively overcomes the defect that a traditional detection method cannot quantitatively evaluate the wear process of the sliding rail, can accurately record the change rule of the friction characteristic of the sliding rail under different opening and closing times, visually reflects the wear critical point through the fluctuation characteristic of the corrugated line, and can accurately predict the failure threshold value of a hardware system. Test data not only reveals the corresponding relation between sliding rail abrasion and opening and closing times, but also can provide a scientific basis for optimizing hardware material pairing and improving a lubricating scheme, the durability design level of energy-saving door and window products is remarkably improved, the technology span from passive detection to active prediction is achieved, and the method is suitable for popularization and application. And a durability test result has a higher engineering guidance value.
Owner:CSCEC XINKE DECORATION ENG CO LTD

Intelligent frequency spectrum prediction system and method with dynamic anti-interference function

According to the intelligent frequency spectrum prediction system and method with the dynamic anti-interference function, through the lightweight AI prediction model deployed in the embedded terminal, prospective accurate prediction of the future frequency spectrum hole probability is achieved, and the time delay defect of traditional passive detection is overcome; through an interference identification and classification module, fine identification of an interference source is realized, and a basis is provided for a differential anti-interference strategy; dynamic global optimization of communication parameters is realized through fusion of a utility function decision mechanism of a prediction result, interference information and historical quality and GFSK / QPSK adaptive modulation switching, and optimal balance is obtained between noise immunity and spectrum efficiency; through maintenance of the pre-switching channel pool and a microsecond-level rapid switching mechanism, challenges brought by strong interference burst and high-speed moving scenes are effectively dealt with, and continuity and high reliability of communication are ensured.
Owner:CHANGZHOU INST OF TECH

Ultra-long distance aviation airborne 5G communication terminal

The invention relates to the technical field of communication terminals, in particular to an ultra-long-distance aviation airborne 5G communication terminal, which comprises an opportunity signal passive detection module for monitoring multi-source opportunity signals in parallel by adopting a broadband multi-channel radio frequency front end, and performing time delay conjugate multiplication and integral operation on reference channel signals and detection channel signals, so as to obtain an opportunity signal passive detection module; and extracting a cross-correlation peak value. According to the method, the multi-dimensional demand vector is formed by analyzing the mirror image metadata of the virtual machine and the configuration parameters, and the multi-dimensional demand vector is compared with the capability vector of the heterogeneous micro-host item by item, so that the scheduling precision can be improved on the two aspects of architecture consistency and resource adaptability. In the matching logic, matching pairs which do not meet conditions are endowed with negative infinite values, invalid scheduling paths are eliminated, candidate matching pairs meeting the conditions are prioritized by calculating resource matching degrees and affinity scores and integrating the adaptation level of network bandwidth and storage performance, and therefore resource utilization efficiency and scheduling reasonability are guaranteed.
Owner:南京品淳通信科技有限公司

PCBA production data intelligent analysis method and system

The invention relates to an intelligent analysis method and system for PCBA production data, and relates to the technical field of PCBA data analysis, and the method comprises the steps: collecting real-time production data in a PCBA production process, associating production batches, and forming a real-time production data sequence; constructing a parameter-defect knowledge graph based on historical production data; after a production defect signal is received, taking a production batch as an index, extracting corresponding real-time production data, taking a corresponding defect type node as a starting point for reverse reasoning, and calculating the contribution degree of each upstream node to the defect type node; and positioning a root cause node, determining a key process parameter node in combination with the type, and outputting a process adjustment suggestion. The method solves the problems that traditional PCBA defect analysis depends on experience judgment and lacks causal correlation analysis among different production key elements in production data, so that root cause positioning is fuzzy, the efficiency is low, passive detection is mostly carried out after defects occur, prevention is difficult to carry out in advance, and then the production quality control effect is affected.
Owner:GUANGDONG YINGCHUANG TECH CO LTD

Passive detection of thermal runaway using acoustic waves

A computer system (100) comprising processing circuitry (102) configured to: receive sensing data (D) from at least one sensor (104) arranged to detect sound waves emitted from electrical energy storage cells (106) of an electrical energy storage system (108), the sensing data indicating at least one characteristic of the sound waves, apply an algorithm (110) configured to predict a thermal runaway event by analyzing the sensing data, provide a message (W) if the outcome of the analysis is that a thermal runaway is predicted.
Owner:VOLVO TRUCK CORP

Passive detection multi-target tracking method based on factor graph optimization of Gaussian mixture model

The invention belongs to the technical field of distributed multi-sensor passive detection multi-target tracking. The invention provides a factor graph optimization passive detection multi-target tracking method based on a Gaussian mixture model. According to the embodiment of the invention, the multi-target batch number is distributed by constructing the distributed passive sensor cooperative coordinate system and combining the multi-target identity judgment result between the two sensors; calculating direction finding lines based on two-dimensional observation of a sensor, combining the direction finding lines of the same batch number, obtaining a multi-target position estimation point set through a least square method, and obtaining a multi-target coarse positioning point through weighted fusion; modeling by adopting a Gaussian mixture model, fusing measurement distribution characteristics, solving parameters through an expectation maximization algorithm, and completing solvable conversion of an optimization problem; a factor graph optimization model containing multiple factors is constructed, state estimation is achieved through sliding window optimization, and track association and state updating are completed in combination with the Mahalanobis distance and the Hungary algorithm; and the passive detection multi-target tracking performance of the distributed sensor is effectively improved.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Distributed unmanned aerial vehicle active defense system

The invention belongs to the technical field of radio countermeasure, and particularly relates to a distributed unmanned aerial vehicle active defense system which comprises an intelligent stationing dynamic optimization module, a multi-mode cognitive interference module, a high-precision three-level clock synchronization module and an elastic ad hoc network communication module which are used for supporting the overall function of the system. The distributed hardware equipment and the edge intelligent decision-making terminal are used for implementing a detection countering function at distributed layout positions; during specific operation and use, a distributed unmanned aerial vehicle active defense system can be provided for an important target with a large area and multiple important parts; the application problems that the arrangement position cannot be accurately selected, a large coverage blind area exists, the synchronous time service precision is low, communication networking is unreliable, serious self-interference is generated on electromagnetic and time service equipment of a partner, and the unmanned aerial vehicle countering effect is poor can be solved. And rapid and automatic passive detection and accurate interference of important targets with a large area and multiple important parts on the low-slow-small unmanned aerial vehicle are realized.
Owner:INST OF ENG PROTECTION NAT DEFENSE ENG RES INST ACAD OF MILITARY SCI CHINESE PEOPLES LIBERATION ARMY

Active and passive electro-magnetic coupling monitoring device and method

The invention discloses an active and passive electro-magnetic method coupled monitoring device and method, and the method comprises the steps: enabling an electromagnetic receiving coil and an electrode to be integrated, and enabling the electrode to enhance the electromagnetic signal receiving capability of the electromagnetic receiving coil; when passive detection is carried out, the electrode and the electromagnetic receiving coil can collect natural potential data and natural electromagnetic data at the same position at the same time, and the consistency of the natural potential data and the natural electromagnetic data in time and space is achieved. When active detection is carried out, transient electromagnetic detection and direct current electric method detection can be carried out in sequence at the same position, so that the two methods carry out synchronous acquisition in time and space as much as possible, and the monitoring range and depth can be widened on the basis of the original electric method monitoring range through combination of the two methods. And the electromagnetic signal receiving capability is enhanced by the electromagnetic receiving coil, so that the influence of environmental interference during monitoring by a transient electromagnetic method is reduced, the coverage of a data grouting area is finally realized, and accurate data can be obtained.
Owner:CHINA UNIV OF MINING & TECH +1

Construction method, device and equipment of intrusion detection model

The embodiment of the invention discloses a construction method, device and equipment of an intrusion detection model. When the method provided by the embodiment of the invention is executed, firstly, a distributed architecture capable of realizing parallel computing of the intrusion detection task of the power internet of things can be established; and constructing a self-adaptive neural network model, and deploying the self-adaptive neural network model to the computing node of the distributed architecture to obtain a target node. And then active and passive combined network detection and data sensing tasks are distributed to the target node, so that context sensing data of all devices in the electric power Internet of Things are obtained. And inputting the context sensing data into the adaptive neural network model to obtain an intrusion detection model. According to the method, the distributed architecture is constructed, the computing resources of multiple computing nodes are fully utilized, the adaptive neural network model is constructed, and the mode of combining active detection and passive detection is combined, so that the network activity and data traffic in the power Internet of Things are comprehensively monitored and perceived, and the coverage range and accuracy of intrusion detection are improved.
Owner:BEIJING HUITONG JINCAI INFORMATION TECH

Drainage pipeline structural defect detection system and method, medium and product

The invention relates to the technical field of drainage pipeline detection, and discloses a drainage pipeline structural defect detection system and method, a medium and a product, a controller actively constructs and generates a coded infrasonic wave signal, and it is ensured that the signal has stable frequency and amplitude characteristics; the infrasonic sound production module performs infrasonic wave emission and processing by using a coded infrasonic wave signal, and enables a low-frequency mechanical vibration signal to be stably propagated along a pipe wall, so that energy attenuation is reduced, and a long-distance pipe section which is difficult to touch in traditional passive detection is covered; the infrasound signal receiving module is used for detecting low-frequency mechanical vibration signals and converting analog signals into initial digital signals, and interference and distortion in the transmission process are reduced. Furthermore, by combining a Fourier transform method and a correlation coefficient analysis method, the problem of high misjudgment rate of a traditional single algorithm is avoided, accurate recognition of the structural defects of the pipeline is ensured, and the requirement for accuracy of structural defect detection of the drainage pipeline under complex working conditions is met.
Owner:THREE GORGES GROUP IND DEVELOPMENT (BEIJING) CO LTD +1

Full-automatic probe position inspection system for probe card

The invention provides a full-automatic probe position inspection system for a probe card, and the system comprises a morphology collection module which is used for carrying out the three-dimensional morphology scanning of a probe group of the probe card, and obtaining the three-dimensional point cloud data of the probe group; the probe position analysis module is connected to the morphology acquisition module, comprises a machine learning model and is used for processing the three-dimensional point cloud data and generating probe position deviation data and probe health state scores; the compensation execution module is connected to the probe position analysis module and is used for scoring based on the probe position deviation data and the probe health state; calculating an optimal contact position, and driving the carrying platform to move to the position; and the verification module is used for verifying the accuracy of the needle position after the contact is executed at the optimal contact position. Passive detection, predictive maintenance and process closed-loop optimization are crossed, and the test yield, the equipment service life and the manufacturing process level are comprehensively improved through data driving.
Owner:WUXI YIYANG SEMICONDUCTOR CO LTD +1

Passive detection method and device in non-Gaussian noise environment and electronic equipment

ActiveCN119758285AWave based measurement systemsHigh level techniquesNoiseLikelihood-ratio test
The invention discloses a passive detection method and device in a non-Gaussian noise environment and electronic equipment. The method comprises the following steps: constructing an M-dimensional probability density function of Rayleigh distribution of a received signal; acquiring a first probability density function of the received signal under a hypothesis H1 and a second probability density function of the received signal under a hypothesis H0; the hypothesis H1 represents the hypothesis that the received signal comprises the radiation source signal; the hypothesis H0 represents the hypothesis that the received signal does not include the radiation source signal; based on the first probability density function and the second probability density function, a generalized likelihood ratio check formula is obtained according to a generalized likelihood ratio basis; deriving the M-dimensional probability density function under the assumption of H1 to obtain maximum likelihood estimation of a product of a channel coefficient and Doppler frequency shift; substituting the maximum likelihood estimation into a generalized likelihood ratio test formula to obtain a test calculation value; and comparing the test calculation value with a threshold value to realize passive detection through a generalized likelihood ratio test algorithm based on test hypothesis under the condition of no reference signal.
Owner:XIDIAN UNIV +1

Intelligent fault detection method and system for network switch

The invention provides an intelligent fault detection method and system for a network switch, relates to the technical field of computers, and aims to realize conversion from passive detection to active prevention by quantifying fault probability and influence, analyzing risk trend and relevance and visually displaying risk distribution. The method comprises the following steps: acquiring historical operation feature information of target network equipment, and constructing a risk prediction model according to the historical operation feature information; determining the failure rate of the target network equipment based on the current operation data of the target network equipment and a risk prediction model; when the fault rate of the target network equipment is greater than or equal to a preset fault rate, obtaining a network topology corresponding to the target network equipment, and determining a fault propagation path according to the network topology; and according to the fault propagation path and the fault rate of the target network device, determining the fault rate of the associated network device on the fault propagation path.
Owner:SHENZHEN MAXTOPIC TECH CO LTD

Passive fault positioning system and method based on SRv6 data plane detection

The invention discloses a passive fault positioning system and method based on SRv6 data plane detection, and the method comprises the steps: deploying a data collection module at an SRv6 network node, passively collecting a passing data message, and adding detection information into the data message; analyzing an SRH extension head in the message to extract detection information, and filtering and processing the detection information to provide formatted data; summarizing detection information in the monitoring data of different nodes in different time periods, and performing association and fusion to form a to-be-analyzed data packet; according to the detection information in the to-be-analyzed data packet, performing fault positioning analysis by using a fault analysis method to lock a fault position; and performing root cause tracing based on the fault positioning position to obtain a fault cause, outputting a fault positioning result and linking a fault processing flow. According to the method, the existing information of the SRv6 data plane is multiplexed to realize non-overhead passive detection, and high-precision and real-time fault positioning of the SRv6 network is realized.
Owner:FUJIAN FUJITSU COMM SOFTWARE CO LTD

Network surveying and mapping behavior anomaly detection method and system based on machine learning

The embodiment of the invention provides a network surveying and mapping behavior anomaly detection method and system based on machine learning, and belongs to the technical field of network surveying and mapping behavior anomaly detection. The method comprises the steps of collecting double-source flow data, and generating a structured log data set through a double-source log fusion engine; performing sub-graph matching calculation to obtain a surveying and mapping behavior deviation degree; generating communication data containing the watermark identifier in a communication path corresponding to the session; and verifying whether an attack event carries the watermark identifier, and generating a network surveying and mapping behavior anomaly detection report. According to the method, the self-adaptive attack behavior model is constructed through the multi-modal feature vector based on the structured log and the graph protocol mapping rule base, the cognitive robustness of protocol camouflage and path drifting is fundamentally enhanced, a detection result real-time verification chain is established, and through cross verification of a watermark carrying state and a behavior track, the detection accuracy is improved. And traditional passive detection is converted into self-proof active defense.
Owner:HUANENG INFORMATION TECH CO LTD

Air outlet anti-leakage and anti-reverse-installation detection method based on image detection

The invention discloses an air outlet anti-leakage and anti-reverse-installation detection method based on image detection, and belongs to the technical field of optical detection. The method comprises the following steps: determining a data acquisition range of image detection in an air outlet area, and delimiting a detection area according to structural parameters of the air outlet; by dividing conventional and error-prone areas, adopting a differential detection strategy and combining a three-dimensional point cloud comparison technology, the unqualified product rate and the detection time consumption of air outlet installation are effectively controlled, the labor cost and the repair rate are reduced, a threshold value is dynamically optimized based on historical data, the recognition precision of a complex area is improved, misjudgment of a difficult point area is solved, and the detection efficiency is improved. Double improvement of detection precision and efficiency is realized; meanwhile, through a three-level risk signal mechanism, conversion from passive detection to active early warning is realized, the risk response time is shortened, the product quality stability is guaranteed, the downtime is reduced, the overall efficiency of a production line is improved, and collaborative optimization of risk management and control and production continuity is realized.
Owner:ANHUI SUNNY PRECISION INTELLIGENT CO LTD

Online quality detection system based on artificial intelligence

The invention discloses an online quality detection system based on artificial intelligence. The online quality detection system comprises a generative full-dimensional perception and cognition twinborn reproduction layer, an interpretable causal atlas and man-machine enhancement cognition layer, an alliance collaboration and credible value tracing layer and an autonomous evolution and scientific discovery layer. Through the online quality detection system based on artificial intelligence, the problems of passive detection, surface recognition, insufficient adaptability to dynamic changes and the like of a current online quality detection system can be solved, and the intelligent level of the online quality detection system is remarkably improved.
Owner:INNER MONGOLIA HUAIFENG TECH CO LTD

Remote central monitoring system for community medical treatment

The invention belongs to the technical field of medical care informatics, and discloses a remote central monitoring system for community medical treatment, which comprises a data acquisition and integration module, a physiological state analysis engine and a monitoring information presentation module, and can construct a state-dependent baseline model cluster based on the activity state information of a user, according to the real-time activity state of the user in the monitoring period, the corresponding sub-model is dynamically selected to serve as a judgment reference, and then a continuously-changing physiological stability index is generated by comparing the multi-dimensional statistical characteristics of the real-time physiological data with the deviation degree of the reference; according to the method, by establishing an individualized physiological steady state judgment benchmark which is adaptively adjusted along with the activity situation, the capability of a monitoring system for continuously and quantitatively evaluating the overall stability of a human body as a complex system is improved, and the transformation from passive detection of discrete clinical events to state insight of a risk evolution process is realized.
Owner:HUNAN ACCURATE BIO MEDICAL TECH CO LTD

Techniques for passive detection of a stock item using a low energy wireless tag and real-time feedback

A system and method for passively determining and placing a stock item using an internet of things (IoT) tag is presented. The method includes receiving, during a predefined time window, data packets from a gateway, wherein the received data packets include at least a sensing signal from a plurality of IoT tags; identifying a first IoT tag from the plurality of IoT tags having a signal strength indicator above a predetermined threshold rank, wherein the first IoT tag is attached to a stock item; identifying the stock item, using a machine learning algorithm on the received data packets of the identified first IoT tag; and causing determination of a placement point to place the identified stock item.
Owner:WILIOT LTD

Unmanned aerial vehicle passive detection signal discrimination method and device based on electromagnetic behavior characteristics

The invention discloses an unmanned aerial vehicle passive detection signal discrimination method and device based on electromagnetic behavior characteristics, and the method comprises the steps: carrying out the collection of direction-finding data, and carrying out the sampling, and obtaining the observation values of signal intensity and azimuth angles; constructing a linear tracking model for tracking filtering; performing initialization setting; updating a tracking chain state at the current moment by using a linear tracking model; and calculating the likelihood probability and the posterior probability of the electromagnetic behavior characteristics at the current moment by using the updated tracking chain state, and judging the electromagnetic behavior characteristics of the unmanned aerial vehicle at the current moment according to a maximum probability principle to finish passive detection signal judgment at the current moment. According to the method, the electromagnetic behavior characteristics are discriminated based on the probability characteristics of the electromagnetic behaviors, the signal discrimination problem of passive detection of an unmanned aerial vehicle of an unknown model is solved, and the observation precision of an observation value and the signal discrimination precision are improved by designing a reasonable linear tracking filtering model.
Owner:HUNAN KUNLEI TECH CO LTD

Cosmic ray muon distribution three-dimensional reconstruction method and system

The invention relates to the technical field of muon imaging, in particular to a cosmic ray muon distribution three-dimensional reconstruction method and system.The method comprises the steps that a monitoring environment is built, an object to be detected is placed at the circle center of an annular guide rail, two lifting platforms are fixed to the annular guide rail, supporting frames are installed on the lifting platforms respectively, and detector panels are arranged on the supporting frames; detecting position information left when muons penetrate through a detector panel, calculating muon tracks and muon flux to obtain angular distribution, and establishing point-surface images of the angular distribution and flux distribution of the muons based on the muon tracks; performing weighted summation to obtain a face-to-face image; and compressing Monte Carlo output muon position information by using an auto-encoder, obtaining momentum, time and position information of muons, and extracting angular distribution in a preset area for classifying the angular distribution and the position information according to the interval. The method is suitable for various use scenes, belongs to passive detection, does not generate radioactive contamination, and can replace industrial CT with radioactive contamination in a specific scene.
Owner:YANTAI UNIV

Integrated low-slow-small unmanned aerial vehicle passive detection system and working method thereof

The invention discloses an integrated low-slow-small unmanned aerial vehicle passive detection system and a working method thereof, and the system combines conventional radio detection and external radiation source detection technologies, and is composed of a broadband antenna, a receiver and a signal processor. The system can monitor the low, slow and small unmanned aerial vehicle in real time, and realizes the functions of direction finding, positioning, monitoring and the like of the unmanned aerial vehicle and the unmanned aerial vehicle pilot. The system fuses signal information acquired by radio detection and external radiation source detection technologies to form more accurate and more comprehensive unmanned aerial vehicle target information. And the target information of the unmanned aerial vehicle is displayed in real time through the display control equipment. Radio detection positioning and passive radar detection are combined, advantages are complementary, the false alarm rate is reduced, and reliability and accuracy are improved; the method is integrally realized, a hardware system is shared, software is used for parallel processing, the cost is reduced, the flexibility is improved, and the method is suitable for low-slow small unmanned aerial vehicle detection under multiple scenes and tasks.
Owner:BEIJING INFORMATION SCI & TECH UNIV +1