Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

82 results about "Form expression" patented technology

Log-spectral compensation of PMC Gaussian mean vectors for noisy speech recognition using log-max assumption

InactiveUS6633843B2Speech recognitionPDAT enzymeDecision circuit
Reducing mismatch between HMMs trained with clean speech and speech signals recorded under background noise can be approached by distribution adaptation using parallel model combination (PMC). Accurate PMC has no closed-form expression, therefore simplification assumptions must be made in implementation. Under a new log-max assumption, adaptation formula for log-spectral parameters are presented, both for static and dynamic parameters. The system takes the mean vector (<HIL><PDAT>41< / BOLD><PDAT>) made up of the static part (<HIL><PDAT>41< / BOLD><HIL><PDAT>a< / ITALIC><PDAT>) and the dynamic part (<HIL><PDAT>41< / BOLD><HIL><PDAT>b< / ITALIC><PDAT>) and the noise vector (<HIL><PDAT>43< / BOLD><PDAT>) made up of the static part (<HIL><PDAT>43< / BOLD><HIL><PDAT>a< / ITALIC><PDAT>) and dynamic part (<HIL><PDAT>43< / BOLD><HIL><PDAT>b< / ITALIC><PDAT>) and applies to a decision circuit (<HIL><PDAT>45< / BOLD><PDAT>) to determine if the quiet vector plus the gain of speech produced in noise with respect to clean speech is greater than the noisy mean vector and if so the static part is equal to the gain plus the clean speech vector and the dynamic part is the change in the the quiet speech vector and if not greater than the noise vector then the static part equals the noise vector and the dynamic part is zero.< / PTEXT>
Owner:TEXAS INSTR INC

Asynchronous motor pure electronic speed feedback method

The invention provides an asynchronous motor pure electronic speed feedback method, which specifically comprises the following operation steps of: firstly obtaining a discrete time form expression of an asynchronous motor mathematical model, obtaining an asynchronous motor reduced order EKF (Extended Kalman Filter) speed estimation algorithm according to an extended Kalman filter algorithm, designing a FPGA (Field Programmable Gate Array) to realize a reduced order EKF speed estimation algorithm structure and carrying out hardware language VHDL (Verilog Hardware Description Language) description on the FPGA based on the described algorithm structure to obtain, send and transmit back state estimated values i alpha s, i beta s, Psi alpha r, Psi beta r and omega r to a main control DSP (Digital Signal Processor) through a port. The asynchronous motor pure electronic speed feedback method has the beneficial effects that the pressure of the main control DSP on real-time operation amount is greatly reduced, so that more storage spaces and more operation spaces are left for speed and current control; the EKF speed estimation algorithm realized by the FPGA in parallel is used for finishing within 1 microsecond, so that a less sampling period can be selected by using the speed estimation algorithm, therefore, the speed estimation precision is greatly improved.
Owner:XIAN UNIV OF TECH

Three-dimensional double moving MIMO (Multiple Input Multiple Output) propagation channel modeling and simulation method

The invention provides a three-dimensional double moving MIMO (Multiple Input Multiple Output) propagation channel modeling and simulation method, which is applied to communication system optimization research and system performance evaluation. In a three-dimensional double moving MIMO propagation system, the modeling and simulation implementation method comprises the steps of carrying out theoretical modeling on a three-dimensional double moving MIMO propagation channel so as to acquire a theoretical mathematic model thereof; converting the theoretical mathematic model into an accumulation model which is convenient for simulation implementation; respectively calculating a value of a three-dimensional discrete arrival angle/departure angle by using joint distribution characteristics of an azimuth angle/pitch angle which is designated or measured by a user; calculating the Doppler frequency shift of a receiving terminal and the Doppler frequency shift of a transmitting terminal by using the moving speed and the moving direction of the receiving terminal and the transmitting terminal and the three-dimensional departure angle/arrival angle; acquiring guide vector matrixes of the receiving terminal and the transmitting terminal by using array antenna flow patterns of the receiving terminal and the transmitting terminal; and substituting the three-dimensional discrete arrival angle/departure angle, the receiving/transmitting terminal Doppler frequency shift, and the receiving/transmitting terminal guide vector matrix into an accumulation form expression of the three-dimensional double moving MIMO propagation channel, and calculating to acquire the three-dimensional double moving MIMO propagation channel.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Medical examination knowledge graph construction method based on LIS

The invention discloses a medical examination knowledge graph construction method based on LIS. The method comprises the steps of concept layer design, instance layer learning and application of an LIS knowledge graph. Specifically, a real record in an LIS system is used as a knowledge base, a concept set in the knowledge field is designed, and the form expression of concepts and concept relationsis emphasized. Medical examination facts matching the conceptual layer are extracted from a large number of LIS system records. Medical examination entities and relations are extracted and the medical examination entities and relations are sorted in a triple form, thereby obtaining a final medical examination knowledge map. The medical examination knowledge graph is applied to two aspects of examination query and reasonable examination. A medical examination knowledge graph is constructed based on real data in medical examination documents and LIS, so that a general medical knowledge graph isperfected, and the medical examination knowledge graph can better serve high-level artificial intelligence medical application. Meanwhile, as an auxiliary query tool of the doctor, the work efficiency of the doctor is improved, and the application scene of the LIS system is developed.
Owner:HUAQIAO UNIVERSITY

Address structuring method and device

ActiveCN104679850ADifficulty of SimplificationStrategies for manual intervention are simpleSpecial data processing applicationsData miningDependency tree
The invention relates to an address structuring method and device. The address structuring method comprises the following steps that step 10, an address text is segmented into address word sequences; step 20, each address word in the address word sequences is subjected to part-of-speech tagging according to a predefined part-of-speech tagging set reflecting the address word features; step 30, the dependency parsing analysis is carried out on the tagged address word sequence according to the pre-defined address word dependency relationship rule, entity address words are used as nodes, the dependency relationship between the entity address words is used as edges, and a dependency parsing chart structure reflecting the address structure is generated. The invention also provides the address structuring device. The address structuring method and the address structuring device provided by the invention have the advantages that the dependency parsing chart structure can be efficiently and automatically generated for representing the dependency relationship between words in the address text, the manual intervention strategy is simple, and the knowing of a great amount of background knowledge is not needed; a dependency tree structure is expanded, so that the relationship between the address words can be expressed in a chart form.
Owner:SHENZHEN AUDAQUE DATA TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products