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

62results about How to "Avoid manual selection" patented technology

A propeller shaft frequency searching method based on improved noise envelope signal recognition

The invention relates to a propeller shaft frequency searching method based on improved noise envelope signal recognition. The method includes: enveloping an original hydrophone signal, and performingHilbert-Yellow transform on each wavelet packet signal to obtain a wavelet envelope signal; performing wavelet reconstruction to obtain an improved noise envelope signal; calculating a time correlation spectrum, take a line spectrum protruding at the peak of the low frequency band as the suspected shaft frequency; setting a step size smaller than the frequency resolution according to the demand;forming a suspected shaft frequency set with the suspected shaft frequency as the center; performing cyclic correlation calculation on a time correlation spectral signal on each suspected shaft frequency to obtain the frequency statistical amount of a cyclic modulation spectrum; and finally searching the shaft frequency of a target according to the frequency statistical amount. The method of the invention corrects axial frequency offset errors generated by the conventional cyclic modulation spectrum methods in the spectrum calculation process, improves the accuracy of the shaft frequency detection, greatly reduces the calculation amount of the loop iteration, and is convenient to implement in engineering application.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Wavelet scatternet-based SAR image segmentation method

The present invention discloses a wavelet scatternet-based SAR image segmentation method, which resolves a technical problem that conventional texture-based SAR image segmentation is inefficient and time-consuming. Implementation steps are that: performing pre-processing of denoising and uniformization on an SAR image; setting a scattering transform path, selecting a wavelet function and a window function, and generating a scattering propagation operator and a scattering operator; performing scattering transform on the SAR image, to obtain a scattering coefficient of an SAR image pixel point; performing K-Means cluster on a scattering texture feature after dimension reduction, to obtain a preliminary segmentation result; searching for affine space in which pixels of different categories are located, to form an affine classifier; and performing sliding window correction on the preliminary segmentation result by using the affine classifier, to implement SAR image segmentation. According to the present invention, it is unnecessary to perform a partitioning operation on the SAR image, and the scattering texture feature that can reduce a difference between same texture and increase a difference between different texture is extracted, and precise and fast segmentation can be performed on the SAR image. The method is used for fast segmentation on a single SAR image.
Owner:XIDIAN UNIV

Method and server for establishing specialty product knowledge bases, and method and server fro providing specialty product information

The embodiment of the invention discloses a method and server for establishing specialty product knowledge bases, and a method and server for providing specialty product information. The method for establishing the specialty product knowledge base comprises following steps of obtaining specialty product knowledge resources; determining specialty product names according to the specialty product knowledge resources; determining specialty product characterization graphs corresponding to the specialty product names according to the specialty product names; determining the specialty product knowledge bases according to the specialty product names and the specialty product characterization graphs; receiving display request information input by a user; selecting the specialty product knowledge bases according to the display request information; and feeding back the specialty product information in the selected specialty product knowledge bases to the user. According to the method and server for establishing the specialty product knowledge bases, and the method and server for providing the specialty product information provided by the embodiment of the invention, the rich degree of the provided specialty product information can be improved.
Owner:ALIBABA GRP HLDG LTD

Audio playing method and device, electronic equipment and storage medium

The embodiment of the invention discloses an audio playing method and device, electronic equipment and a storage medium, and is applied to an intelligent terminal, and the audio playing method comprises the steps: obtaining the audio type of to-be-played audio data; acquiring environment information of an environment where the intelligent terminal is located; according to the audio type and the environment information, acquiring playing priorities corresponding to a plurality of playing equipment, wherein the plurality of playing equipment includs an intelligent terminal and audio playing equipment in communication connection with the intelligent terminal; determining target playing equipment in the plurality of playing equipment according to the playing priority; and playing the audio data by the target playing equipment. Through the implementation of the embodiment, the target playing equipment can be selected based on the audio type of the audio data and the information of the environment where the intelligent terminal is located, and the audio data is played, so that the target playing equipment can be adaptively selected based on the environment of the intelligent terminal and the audio data, and the effect of playing the audio data conforms to the expectation of a user.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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