9 results about "S-wave" patented technology

The application discloses a microseismic source positioning method, device, equipment and medium, and relates to the field of earthquake monitoring, and comprises the following steps: acquiring initial seismic data, converting the initial seismic data into an envelope signal; determining a reference channel, identifying P-wave peaks and S-wave peaks on the envelope signal of the reference channel to determine a reference P-S separation point; aligning the envelope signal by using a dynamic time warping algorithm to obtain an alignment path; mapping the reference P-S separation point to each seismic channel according to the alignment path to obtain an aligned P-S separation point, and determining a wave phase travel time offset according to the alignment path; based on the aligned P-S separation point, extracting P-wave signals and S-wave signals from the envelope signal respectively to determine a P / S wave double-difference correlation function; constructing a weighted imaging operator based on the P / S wave double-difference correlation function and the wave phase travel time offset, and scanning the weighted imaging operator to determine a microseismic source position in a three-dimensional grid map. The source position can be accurately positioned under the 3D grid.

The invention discloses an inversion method and device for a longitudinal-transverse wave velocity ratio of a coal measure strata, and the method comprises the steps: determining the longitudinal-transverse wave velocity ratio reflectivity of a target interval according to the prestack angle gather data of the target interval, and extracting the attribute data of the longitudinal-transverse wave velocity ratio reflectivity through employing the AVO technology; according to the longitudinal and transverse wave velocity ratio curve, the attribute data of the longitudinal and transverse wave velocity ratio reflectivity and preset wavelet extraction time window parameters, wavelet extraction is carried out on the target layer section through the wavelet extraction technology; the longitudinal and transverse wave velocity ratio curve is determined according to logging data; and according to the wavelet and the attribute data of the velocity ratio reflectivity of the longitudinal and transverse waves, performing post-stack compressed sensing reflection coefficient inversion to obtain an inversion result of the velocity ratio reflectivity of the longitudinal and transverse waves. According to the invention, a stable inversion result of the longitudinal and transverse wave velocity ratio can be effectively obtained.

This invention relates to an intelligent P / S wave arrival time picking method based on structure and target synergistic enhancement, comprising the following steps: Step 1, constructing a bimodal joint probability modeling system and generating P / S wave joint probability distribution labels; Step 2, designing a HybridAttnUNet1D network architecture based on the task paradigm of Step 1; Step 3, executing a general method flow for model training based on the labels of Step 1 and the model of Step 2; Step 4, realizing P / S wave arrival time inference picking and performance verification based on the model trained in Step 3. This invention jointly predicts P and S waves, effectively preserving the relative temporal relationship between P and S waves, thereby improving the stability and noise resistance of arrival time picking. This invention also designs a HybridAttnUNet1D network model, which aims to take into account both the multi-scale local features and global temporal dependencies of microseismic signals. The network input is the original one-dimensional microseismic waveform time series, and the final output is a P / S wave bimodal joint probability distribution sequence of the same length as the input.

This invention provides a method for evaluating the safety of climbing utility poles based on structural deformation and material properties. The method includes: collecting the basic parameters of the utility pole; calculating the pole's tilt angle based on the basic parameters and issuing a hazard warning based on the tilt angle; calculating geometric evaluation indicators based on the basic parameters and the tilt angle; calculating the pole's wave velocity based on the basic parameters, judging the material quality, and calculating material performance indicators; calculating the pole's burial depth based on the wave velocity, judging the burial depth quality, and calculating a burial depth safety index; calculating a comprehensive climbing safety index based on the geometric evaluation index, material performance index, and burial depth safety index, and classifying the utility pole's safety based on the comprehensive climbing safety index. This method quantifies latent deterioration, forming a standardized evaluation system, avoiding misjudgments, thereby improving the accuracy and objectivity of pole climbing safety evaluation and effectively reducing operational safety risks.

This invention discloses an in-situ protection and reinforcement device for the ancient embankment heritage of the Grand Canal, belonging to the field of ancient embankment protection technology. It includes a plate installation assembly, an impact dispersion assembly, and an impact conversion structure. The main body of the baffle is made of high-strength, corrosion-resistant composite material. The bottom conical insertion nails guide and embed into the underwater soil, ensuring precise initial positioning and strong anchoring force, enabling rapid vertical fixation and effectively preventing soil collapse and water erosion. The device is installed in situ without large-area excavation, minimizing disturbance to the ancient embankment heritage and its surrounding environment, adhering to the principle of minimal intervention in cultural heritage protection. The arc-shaped mesh plate on the wave-facing side uses its curved surface to redirect the flow and permeable holes to divert water, initially dispersing continuous surging waves and reducing impact intensity. Combined with connecting rods, sliding blocks, dampers, and buffer springs, a mechanical buffer circuit is formed, converting impact kinetic energy into elastic potential energy and damping dissipation energy. This provides efficient buffering for small waves and stable unloading for large waves, significantly improving the device's wave resistance and anti-overturning capabilities.

The application provides an ice cover granular snow layer density estimation method and system based on a vehicle-mounted noise source, relates to the technical field of physical exploration and ice cover detection, and the method comprises the following steps: according to the exact start and end time period of each vehicle-mounted noise event, a corresponding multi-channel vehicle-mounted noise event data is obtained by intercepting from an original continuous noise record; the mutual coherence processing and linear superposition of the intercepted multi-channel vehicle-mounted noise event data are carried out to obtain a virtual shot record with improved signal-to-noise ratio; P wave and surface wave in the record are jointly inverted to obtain a P wave and S wave velocity structure, and on the basis, a double-parameter granular snow layer density formula fitting is carried out. The application is suitable for realizing the quantitative estimation of the regional scale ice cover granular snow layer density structure by using passive source seismic signals, and provides parameter support for ice cover engineering activity site evaluation and environmental evolution research.

The present application relates to the field of rock physics, and discloses a method and device for characterizing pore structure of a tight reservoir, an electronic device and a storage medium. The method comprises: performing edge removal processing on a tight reservoir sample, and performing equidistant segmentation processing on the edge-removed sample; constructing a reservoir pressure condition of the equidistant segmented sample, and measuring sample porosity of the equidistant segmented sample; detecting a pore type of the equidistant segmented sample, performing non-destructive scanning on the equidistant segmented sample, obtaining a gray scale frequency distribution of the equidistant segmented sample, and identifying pore structure parameters; calculating P and S wave velocities and waveform images, extracting elastic parameters, and extracting attenuation attributes of the equidistant segmented sample; constructing an intersection image, identifying sensitive attributes of the equidistant segmented sample, constructing a relationship model, performing pore structure characterization processing on the tight reservoir sample, and obtaining pore structure characterization results of the tight reservoir sample. The present application can reduce the limitations of pore structure characterization of the tight reservoir.

The utility model discloses lengthened pipe body oxygen lance pipe belongs to metal hose technical field, this lengthened pipe body oxygen lance pipe includes bellows, the outer wall of bellows is provided with the protection assembly for preventing bellows, and the protection assembly includes the protection layer of setting in the bellows outer wall, and the protection layer includes the micro -groove of setting in every wave crest position of bellows, and the side coupling agent layer of micro -groove, and the fluorine rubber transition layer is adhered outside coupling agent layer, and the main rubber vulcanization layer is adhered to the outer wall of fluorine rubber transition layer. The utility model discloses when the bellows deflection, the wave crest apex of wave band abuts at the adjacent wave band's wave abdomen, so that the impact friction energy is effectively absorbed by the protection layer, and the wave crest apex of bellows is extended to the wave abdomen of two sides with the protection layer as the center and does not exceed 30% of wave crest height, and the thickness of protection layer is gradiently decreased along the wave crest apex to the wave abdomen of two sides, effectively avoids the jam of causing to the wave valley, and influence bellows's maximum deflection angle.

The application provides a seismic three-dimensional observation system imaging grid design method, which comprises the following steps: obtaining geological conditions of an exploration work area, and determining a main frequency and a propagation speed of a seismic wavelet according to the geological conditions; calculating a first parameter according to the main frequency of the seismic wavelet, and calculating a grid size of seismic imaging according to the propagation speed and the first parameter. The application also provides a computer device and a computer readable storage medium. The application is based on the wavelength relationship between the P wave and the S wave of the seismic wavelet in different speed strata, uses the sampling theorem to ensure the non-aliasing sampling of the seismic prestack migration, ensures the requirement of the imaging grid for the migration imaging in the acquisition observation system design stage, and further ensures the imaging precision of the seismic exploration.