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502 results about "Mode matching" patented technology

Solid state optical phased array lidar and method of using same

A lidar-based apparatus and method are used for the solid state steering of laser beams using Photonic Integrated Circuits. Integrated optic design and fabrication micro- and nanotechnologies are used for the production of chip-scale optical splitters that distribute an optical signal from a laser essentially uniformly to an array of pixels, said pixels comprising tunable optical delay lines and optical antennas. Said antennas achieve out-of-plane coupling of light.As the delay lines of said antenna-containing pixels in said array are tuned, each antenna emits light of a specific phase to form a desired far-field radiation pattern through interference of these emissions. Said array serves the function of solid state optical phased array.By incorporating a large number of antennas, high-resolution far-field patterns can be achieved by an optical phased array, supporting the radiation pattern beam forming and steering needed in solid state lidar, as well as the generation of arbitrary radiation patterns as needed in three-dimensional holography, optical memory, mode matching for optical space-division multiplexing, free space communications, and biomedical sciences. Whereas imaging from an array is conventionally transmitted through the intensity of the pixels, the optical phased array allows imaging through the control of the optical phase of pixels that receive coherent light waves from a single source.
Owner:QUANERGY SOLUTIONS INC

Online voiceprint recognition system and implementation method thereof

InactiveCN102543084APrevent recording attack problemImprove accuracySpeech analysisTransmissionPasswordAuthentication server
The invention discloses an online voiceprint recognition system and an implementation method thereof. The online voiceprint recognition system comprises a user recording module and an online voiceprint recognition server, and the implementation method comprises the following steps of: (1) providing generated password content for a user through the online voiceprint recognition server; (2) recording the voice of the user by utilizing the user recording module and providing the voice for a voice recognition module; (3) performing mode matching analysis on voice content provided by the user and the password content through the voice recognition module; (4) judging whether an audio fingerprint of the voice provided by the user is of the legal voice or not through an audio fingerprint recognition module; and (5) inspecting the matching degree between the voice provided by the user and a voiceprint module established by the registered user through a voiceprint recognition module, and regarding login is the real user login and receiving the login of the user if the degree achieves a set value. According to the online voiceprint recognition system and the implementation method thereof, disclosed by the invention, simple, easy-to-use and high-efficient online identity authentication can be realized.
Owner:SHENGLE INFORMATION TECH SHANGHAI

Real-time monitoring method of public building energy consumption based on data mining

InactiveCN102289585ADetect and report abnormal energy consumption in timeHas the ability to resist noise interferenceSpecial data processing applicationsRobustificationBuilding energy
The invention discloses a real-time monitoring method for the energy consumption of a public building based on data mining, belonging to the technical field of building energy saving. The method disclosed by the invention comprises the following steps: S1. establishing a building energy consumption mode judgment tree; S2. collecting building energy consumption data in real time; and S3. judging whether the current building energy consumption data are energy consumption abnormal points or not, carrying out the mode matching on the current building energy consumption data and the building energy consumption mode judgment tree and judging whether the current building energy consumption data are isolated points or not. In the method disclosed by the invention, the specific energy consumption mode of the building is identified by carrying out the cluster analysis on the historical energy consumption data; the building energy consumption mode judgment tree is obtained by classifying the data; the mode matching is carried out on the energy consumption data which are dynamically collected in the real-time monitoring course for the energy consumption of the building; and the isolated point analysis is carried out on the energy consumption data and the historical data which have the same mode, thereby judging whether the current building energy consumption data are abnormal or not. The method disclosed by the invention has the characteristics of good real-time characteristic, generality and robustness.
Owner:CHONGQING UNIV

Intelligent universal wireless charging system for mobile phone

The present invention provides an intelligent universal wireless charging system for a mobile phone. The system comprises a mobile phone wireless charger, a wireless charging battery and a mobile phone wireless charging management terminal. The mobile phone wireless charger is provided with a Bluetooth communication module for information interaction with the mobile phone wireless charging management terminal, and according to basic information of a battery to be charged, a charging mode matching with the battery is selected. The wireless charging battery includes an energy receiving coil, a rectification and filtering circuit and a battery unit. The receiving coil is arranged at the bottom of the wireless charging battery, and is provided with an electromagnetic shielding layer on the back. The mobile phone wireless charging management terminal can detect relative parameters of the battery in real time, and feed the information back to the mobile phone wireless charger by the own Bluetooth module of the mobile phone, thereby facilitating the real-time adjustment of the charging mode and the charging power. Besides, the mobile phone wireless charging management terminal has a charging completion reminding function. The system provided by the invention can be used for wireless charging of mobile phone batteries of different models, and is simple and convenient to operate.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV +1

Replay attack detection method based on distortion features of speech signals introduced by loudspeaker

The invention discloses a replay attack detection method based on the distortion features of speech signals introduced by a loudspeaker. The method includes the following steps that: speech signals to be detected are pre-processed, and noised speech frames in the speech signals to be detected are reserved; feature extraction is carried out on each noised speech frame in the pre-processed speech signals, so that speech signal linear distortion and nonlinear distortion feature-based feature vectors can be obtained; the average value of the feature vectors of all the noised speech frames is obtained, and statistical feature vectors can be obtained, and the feature model of the speech signals to be detected is obtained; the feature vectors of a training speech sample are extracted, so that a training speech feature model can be obtained, the training speech feature model is utilized to train an SVM (Support Vector Machine model), so that a speech model library can be obtained; and SVM mode matching is performed on the feature model of the speech signals to be detected and the trained speech model library, and a decision result can be outputted. With the replay attack detection method of the invention adopted, real-time and effective detection of replayed speech can be realized.
Owner:WUHAN UNIV

Intersection traffic flow characteristic analysis and vehicle moving prediction method based on trajectory data

The invention discloses an intersection traffic flow characteristic analysis and vehicle moving prediction method based on trajectory data, and belongs to the technical field of intelligent traffic system and traffic flow parameter acquisition. The method starts with space transient analysis of a vehicle original trajectory, and describes and analyzes trajectory local geometrical characteristics at different angles, forms a multilevel spectral clustering processing framework based on a vehicle original rough movement track, and automatically extracts and analyzes a plurality of traffic direction modes of an intersection included in the trajectory data. With the basis, the method can acquire intersection sub-phase (signal control intersection) traffic flow and travel time of vehicles in all directions passing through the intersection, and other detailed traffic characteristic parameters, as important complement of conventional traffic data. Through tracking travelling tracks of all moving vehicles at present moment, a traffic direction trajectory mode matching method is used to predict the next behavior of the vehicles, thereby being beneficial for warning safety risks which may exist on an intersection in real time.
Owner:中天思创信息技术(广东)有限公司

Voice-print authentication system having voice-print password picture prompting function and realization method thereof

The invention discloses a voice-print authentication system having a voice-print password picture prompting function, which comprises a password establishing module, a voice recognition module and a voice-print recognition module; the password establishing module is connected with a server, a password is a random password or consists of a random password and a fixed password, the server generates the random password, and the random password is displayed on a login terminal of a user in a picture format; the voice recognition module is used for analyzing content of voice provided by the user and for performing the mode matching of the voice content provided by the user and the password content generated by the server, if the voice content is not matched with the password content, the password provided by the user is proved not to satisfy the requirement, and if the voice content is matched with the password content, the voice-print recognition module is entered; and the voice-print recognition module is divided into a register unit and a test unit, wherein a speaker model is established in the register unit, and the test unit calls the speaker model to analyze the characteristics of the provided voice in test and to execute the confirmation judgment so as to determine to accept or to refuse. In addition, the invention also discloses a realization method of the system. Due to the adoption of the system and the method, the security of the voice-print authentication can be improved.
Owner:SHENGLE INFORMATION TECH SHANGHAI

System and method for positioning underground personnel

The invention discloses a system and a method for positioning underground personnel in a coal mine. The system comprises a ground monitoring center arranged aboveground, a transmission base state arranged underground, a plurality of gateway nodes, an optical fiber, a bus, a plurality of wireless beacon nodes and a plurality of mobile nodes, wherein the system is intrinsically safe when applied to underground equipment. The method is a positioning method based on mode matching and comprises the steps of: dividing a roadway into different blocks according to a roadway structure and the signal coverage area of the beacon nodes, distributing the beacon nodes in each block according to a same manner, generating a positioning mode database on the ground monitoring center through training the nodes in a training state, sending a positioning mode to the ground monitoring center by the mobile nodes according to the positioning signals of the received beacon nodes in a positioning stage, matching a mode generated by training the nodes in the database to find out a proximate mode, thereby realizing accurate positioning. The system and the method for positioning the underground personnel are high imprecision, low in cost and low in energy consumption, and the system is simple in equipment structure.
Owner:CHINA UNIV OF MINING & TECH (BEIJING)

Event warning method based on Internet information

The invention discloses an event warning method based on Internet information and belongs to the technical field of information. The method comprises the following steps. Firstly, crawling of webpage information on each set website is performed, the webpage information is stored, and information relevant to an event is obtained. Secondly, junk information filtering is performed on the information which is relevant to the event and obtained by crawling. Thirdly, an event information main body is set up, the information after filtering is sorted based on example names and attributes in the event information main body by utilizing a mode matching method. Fourthly, the sorted information is clustered according to set characteristics, and events in each kind of information are obtained. Fifthly, all the characteristic parameter values of each event are obtained regularly, and if a difference value of all the characteristic parameter values of one event and an average value of the event in a given previous period exceeds a preset threshold, warning on the event is performed. The event warning method based on the internet information ensures timeliness, accuracy and comprehensiveness of information identification and warning of food safety events, and improves efficiency of risk warning of food safety.
Owner:COMP NETWORK INFORMATION CENT CHINESE ACADEMY OF SCI

Solid state optical phased array lidar and method of using same

A lidar-based apparatus and method are used for the solid state steering of laser beams using Photonic Integrated Circuits. Integrated optic design and fabrication micro- and nanotechnologies are used for the production of chip-scale optical splitters that distribute an optical signal from a laser essentially uniformly to an array of pixels, said pixels comprising tunable optical delay lines and optical antennas. Said antennas achieve out-of-plane coupling of light.As the delay lines of said antenna-containing pixels in said array are tuned, each antenna emits light of a specific phase to form a desired far-field radiation pattern through interference of these emissions. Said array serves the function of solid state optical phased array.By incorporating a large number of antennas, high-resolution far-field patterns can be achieved by an optical phased array, supporting the radiation pattern beam forming and steering needed in solid state lidar, as well as the generation of arbitrary radiation patterns as needed in three-dimensional holography, optical memory, mode matching for optical space-division multiplexing, free space communications, and biomedical sciences. Whereas imaging from an array is conventionally transmitted through the intensity of the pixels, the optical phased array allows imaging through the control of the optical phase of pixels that receive coherent light waves from a single source.
Owner:QUANERGY SOLUTIONS INC

Alternative current electric crosstalk and insulation fault monitoring line selection method of direct current system

ActiveCN103135038ARealize line selection functionObvious ground faultCurrent/voltage measurementEarth resistance measurementsCurrent sensorData acquisition
The invention relates to an alternative current electric crosstalk and insulation fault monitoring line selection method of a direct current system. The direct current system is formed by an upper computer, a monitoring device, a sampling system and a current sensor. The alternative current electric crosstalk and insulation fault monitoring line selection method includes the steps of extracting a ripple crest value in the direct current system through extracting of an alternating component effective value, adopting the alternative current and direct current component separation digital filtering technology, the direct current leakage current detection technology, the recommend standard 485 (RS485) isolation communication technology and the fast fourier transform algorithm (FFT) conversion technology to monitor system bus over-the-ground alternative and direct current voltage and a ripple voltage peak value in real time to give an alarm, receiving loop leakage current information uploaded by a data collector, carrying out intelligent analysis through mode matching technology, calculating grounding resistance, carrying out artificial intelligence mode matching on feature status information of each loop and configured feature rules in the system, enabling the alternative current electric crosstalk faults, ripple voltage peak value monitoring data, grounding fault and insulation fault loop status information, loop information and the like which to be displayed on a liquid crystal display, assisting operation and maintenance workers to accurately know the current status to rapidly remove the faults.
Owner:GUANGZHOU PREFECT SERVICE ELECTRONICS TECH

Method for implementing electronic edition standard answer, and application system thereof

The invention discloses a method for implementing an electronic edition standard answer, and an application system thereof. The system comprises a computer and system software running on the computer. The system can comprise an image acquisition module and hardware such as a camera, a light source and a mechanical moving device or does not comprise the image acquisition module and the hardware and uses images acquired through scanning. The computer comprises complete system software and is layered; a user interface of the computer is connected with an application layer module comprising answer sheet editing, answer editing, scanning and marking, result displaying and managing, assisting and system managing; and a system control layer below an application comprises a data communication module, an image processing module, a mode matching module of the image processing module, a data management module and a database. Due to the electronic edition standard answer and a given image processing mode matching algorithm, an editable answer sheet system can improve the marking efficiency, namely increase the marking speed by limiting a comparison region, and support complicated application such as various answer sheet types, multiple pages and large-scale examination marking.
Owner:上海高粱信息科技有限公司
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