88 results about "S-wave" patented technology

The invention discloses an S-wave seismic phase first arrival identification method based on actually measured blasting-induced particle vibration signals, and relates to the field of negative effect monitoring and safety evaluation of blasting vibration induced by rock blasting excavation, and the method comprises the steps: determining a blasting scheme based on a scanning result; arranging a blasting vibration sensor; acquiring actual measurement waveforms of blasting vibration at different blasting center distances; constructing an S-wave seismic phase first arrival recognition function; and obtaining the first arrival moments of the S-wave seismic phases of the actually measured vibration waveforms at different explosion center distances. Compared with the prior art that the recognition precision of the S wave of the blasting vibration signal under the engineering scale is low and the like, by comprehensively utilizing the differences of the S wave, a noise signal, a P wave and a P wave tail wave in the aspects of energy, frequency, polarization characteristics and the like, recognition parameters such as the ratio of transverse energy to total energy, the polarization degree and the deflection angle are introduced, and the transverse energy serves as a weight coefficient; an S-wave recognition function suitable for actual measurement of blasting vibration is provided, and the technology has the advantages of small recognition error, high efficiency and the like.

The invention discloses a mine microseismic event self-positioning method and a mine microseismic event self-positioning system without a prior velocity structure, which realize integration of underground velocity structure inversion and seismic source positioning by jointly utilizing microseismic signals and surface wave interference noise generated in a mining process. Comprising the following steps: arranging an earth surface detector array to collect micro-motion and micro-seismic mixed signals; extracting a surface wave dispersion curve to invert a stratum S-wave velocity model, and further constructing a P-wave velocity model when the stratum Poisson's ratio in the geological data is known; carrying out seismic phase pickup after carrying out noise reduction on the microseismic signal, and obtaining first arrival time of a P wave and an S wave; and constructing a target function taking the first arrival time, the seismic source position, the seismic moment and the velocity model as parameters, and optimizing the target function to realize accurate positioning. According to the method, early-stage field acoustic logging construction of a mine is avoided, surface wave interference noise is fully utilized, the utilization rate of monitoring data is improved, and mine microseism event positioning without a prior speed structure is achieved.

The invention discloses a multi-wave chromatography and reflection combined detection method and device for a thin-covering-layer urban active fault and a medium. The method comprises the steps that longitudinal wave seismic data and transverse wave seismic data are collected; recording vertical component data based on the longitudinal wave seismic data for first arrival travel time pickup and tomography inversion to obtain a longitudinal wave velocity structure model Vp; extracting Rayleigh surface wave frequency dispersion through the vertical component data and carrying out multichannel surface wave analysis inversion to obtain a transverse wave velocity structure model Vs; calculating a longitudinal and transverse wave velocity ratio parameter structure model Vp / Vs, and calculating to obtain a Poisson's ratio parameter structure model v; obtaining a longitudinal wave (P wave) reflection profile and a transverse wave (S wave) reflection profile; identifying and summarizing into an interpretation fracture set Fc, and recording key elements; and by taking the interpretation fracture set Fc as a structural skeleton, completing unified registration and superposition display on Vp, Vs, Vp / Vs and v, a longitudinal wave reflection profile and a transverse wave reflection profile, and outputting a shallow underground structure comprehensive interpretation map of the thin covering layer region.

The invention discloses an ultra-deep reflection imaging method based on passive source seismic data and a related device, and relates to the technical field of earth depth structure imaging, and the method comprises the following steps: firstly, for original continuous seismic waveform data, intercepting seismic waveform data with a first arrival of a P wave and a non-arrival of an S wave, and carrying out the preprocessing of the data, so as to obtain a far earthquake event data segment; the method comprises the following steps: firstly, analyzing and identifying a far earthquake event with a high signal-to-noise ratio by using a time-frequency-wavenumber domain, removing data which are greatly influenced by noise, and then, reconstructing a reflection wave field of a high-quality far earthquake data fragment by using a multi-dimensional deconvolution technology, and carrying out convolution on a seismic source wavelet to obtain ultra-deep reflection wave field data. And finally, performing reflection imaging processing in combination with velocity analysis and superposition imaging technologies, optimizing the analysis capability of a deep reflection interface, and finally obtaining an earth deep reflection imaging profile, so that a continuous structure interface extending from the shallow earth crust to the deep mantle can be clearly revealed, and coupling characteristics between shallow and deep earth structures can be effectively captured.

The invention relates to a seismic phase pickup method based on time-frequency analysis and deep learning, and belongs to the field of seismology, a deep neural network comprising an empirical mode decomposition module, a residual shrinkage module, an LSTM layer, a transformer layer, an up-sampling layer and a convolutional layer is established, a linear rectification function is adopted as an activation function, an Adam adaptive optimization function is adopted for back propagation, and a seismic phase is obtained. And taking a binary cross entropy loss function as a loss function, and taking a mean absolute error function, an error standard deviation, an accuracy rate, a recall rate and an F1 score as evaluation indexes to obtain a deep neural network model. When the frequencies of the noise, the P wave and the S wave are different, empirical mode decomposition can effectively separate the noise, the P wave and the S wave, so that the network is helped to better identify the P wave and the S wave. Even for broadband noise, the noise can be decomposed into different intrinsic mode functions, so that the noise content in the intrinsic mode functions where P waves and S waves are located is reduced. The time-frequency analysis method can effectively improve the anti-noise capability of the network.

The invention discloses a method and a system for calculating three-dimensional S wave velocity structure interpolation based on an OTG model, which are based on a hybrid interpolation model fusing OK, TPS and GCN technologies, dynamically adjust the weight of an S wave velocity interpolation predicted value calculated based on three methods of OK, TPS and GCN through an adaptive fusion mechanism, and calculate the S wave velocity interpolation predicted value based on the OTG model. And combining with a predicted point coordinate to obtain a final three-dimensional S-wave velocity structure interpolation. In the process of calculating the final S-wave velocity structure interpolation, the multi-dimensional composite loss function is fused, the deviation between the interpolation result and the real physical attribute of the underground medium is reduced, the optimized interpolation result is deeply coupled with the three-dimensional geologic modeling process, accurate mapping of the S-wave velocity in the three-dimensional space is achieved, and the accuracy of the S-wave velocity in the three-dimensional space is improved. And high-fidelity input is provided for subsequent tasks. The method provides an effective means for the three-dimensional fine modeling of the S-wave velocity, and has important reference value for improving the exploration efficiency of oil and gas resources and optimizing the early warning of engineering geological disasters.

The invention discloses a two-parameter foundation pile group horizontal dynamic response analysis method under the action of earthquake S waves, and belongs to the field of pile foundation vibration analysis. The method comprises the following steps that S1, basic parameters are set, specifically, a foundation is simplified into a two-parameter Pasternak foundation, and a pile foundation is simplified into an Euler beam model; s3, establishing a pile-soil coupling horizontal vibration frequency domain analysis model; and S4, the relation between the pile displacement and the load is substituted into the pile-soil coupling horizontal vibration frequency domain analysis model, and the horizontal displacement value of each single pile is obtained through analysis. By the adoption of the two-parameter foundation group pile horizontal dynamic response analysis method under the earthquake S wave effect, the Pasternak foundation model is adopted, the shear effect of the soil body around the piles is considered, the constraint effect of the soil body around the piles on the pile bodies can be better simulated, an analytical solution method is adopted, and the method has the advantages that resources are saved, mathematical preciseness is guaranteed and the like; and theoretical guidance is provided for aseismic design of pile foundation engineering.

The utility model discloses a ship wave breaking structure which comprises a wave breaking structure body, a fixing clamping groove is formed in the outer surface of the rear end of the wave breaking structure body, a welding piece is arranged on the inner wall of the fixing clamping groove, and a buffering protection structure is arranged on the outer surface of the front end of the wave breaking structure body. According to the ship wave breaking structure, by arranging the left ice breaking structure, the right ice breaking structure and the buffering protection structure, floating ice on the water surface can be broken, the resistance of a ship running in a severe cold water area is reduced, and the situation that the floating ice influences running of the ship in the severe cold water area is avoided; the front reinforcing blocks and the side reinforcing blocks can further reinforce the icebreaking surface structures of the icebreaking blades, the icebreaking efficiency of the left icebreaking structure and the right icebreaking structure is further improved, the resistance of the wave breaking structure body in water can be reduced, corrosion of seawater to the wave breaking structure body can be avoided, and the service life of the wave breaking structure body is prolonged. And the top buffer block can buffer collision on the front end of the wave breaking structure main body.

The invention discloses an elastic reverse time migration imaging method based on deviatoric stress characterization, and relates to the technical field of exploration geophysics. Deviatoric stress is introduced into a conventional elastic wave equation, and a speed-deviatoric stress elastic wave equation describing stress propagation characteristics is obtained through derivation; based on Hooke's law, P wave contribution in total partial strain is removed through partial strain decomposition, decoupling of P-S wave stress components is achieved, and correctness of amplitude, phase and physical unit of a decoupling wave field is guaranteed; and then a joint imaging condition with the average stress as a seismic source wave field and the multi-stress component as a receiving wave field is constructed, PP waves are subjected to normalization superposition through the average stress and the deviatoric stress, and PS waves are subjected to shear stress imaging. According to the method, the sensitivity to heterogeneity and local stress variation of underground media can be remarkably improved, P-S wave crosstalk and imaging noise are effectively eliminated, the imaging precision and resolution of a complex geologic structure are greatly improved, and a reliable technical means is provided for high-precision seismic exploration of complex oil and gas reservoirs.

The invention relates to a wave flow water tank test device and method for impact of a solitary wave on a deep sea wind power jacket foundation structure, and the device comprises a water tank, a solitary wave generation device, a wave dissipation grid, a wave height meter, a pressure sensor, a high-speed camera, a jacket foundation model, a cement platform base, and a data collection device. The solitary wave generating device is arranged in the front-end concrete section, the jacket foundation model is installed in the middle test section through the cement platform base, the wave dissipation grid is arranged in the rear-end concrete section, and a plurality of wave height meters are arranged on the front side of the jacket foundation model and used for monitoring the wave height of the head wave face of a jacket. A plurality of pressure sensors are uniformly arranged on the jacket basic model and are used for measuring the wave force borne by the local structure of the jacket; the wave height meters and the pressure sensors are electrically connected with the data acquisition device. The device and the method can effectively simulate and measure the impact effect of different forms of solitary waves on the deep and far sea wind power jacket model.

The application discloses a coal seam roof sandstone aquifer water enrichment evaluation method based on three-dimensional seismic, which comprises the following steps: S10, collecting drilling data, well logging data and high-precision three-dimensional seismic data of a research area; S20, inverting pre-stack seismic data to obtain a P-S wave velocity ratio of the roof sandstone aquifer; S30, performing time-frequency analysis on post-stack seismic data and performing spectral equalization on frequency domain seismic data; S40, inverting a longitudinal wave frequency dispersion attribute of a target layer according to a reflection coefficient approximate formula and the time-frequency spectrum of the post-stack seismic data after the spectral equalization; S50, using an entropy weight method to calculate weight values of the P-S wave velocity ratio and the longitudinal wave frequency dispersion attribute; and S60, constructing a water enrichment indication factor calculation formula and evaluating water enrichment of the sandstone aquifer according to the water enrichment indication factor. The method is based on the theoretical basis of seismic rock physics, has low cost, high operability, more statistical significance, can quickly and accurately evaluate water enrichment of the coal seam roof sandstone aquifer, and provides technical support for development and utilization of coal resources.

The invention discloses a novel multi-component conversion multiple imaging method for a deep-sea rugged seabed structure, and relates to the technical field of geophysical exploration for petroleum, and the method comprises the steps: inputting a longitudinal and transverse wave velocity field, a seismic source wavelet, observation system parameters, and a rugged seabed elevation; constructing a non-uniform curved grid of the acoustic-viscoelasticity model; calculating an acoustic-viscoelastic primary wave field continuation operator of vector wave separation under the curved coordinate system; calculating an acoustic-viscoelastic primary wave adjoint wave field of vector wave separation under the curved coordinate system based on an adjoint state theory; calculating an acoustic-viscoelastic n-order multiple wave field continuation operator of vector wave separation under the curved coordinate system; and calculating an acoustic-viscoelastic n-order multiple accompanying wave field of vector wave separation under the curved coordinate system, and generating a multiple imaging result by applying an elastic multiple imaging condition of vector wave separation. According to the invention, full-path compensation and longitudinal and transverse wave vector imaging of multiple waves can be realized, the imaging range is expanded, and the information amount of imaging is increased.

The invention provides a Sigmoid modulation phase correlation surface wave full waveform inversion method and system. The method comprises the following steps: acquiring a surface wave seismic record and constructing an initial S wave velocity model; performing forward modeling to generate a synthetic record; calculating instantaneous phase correlation of observation and synthetic records to construct an amplitude-independent target function; modulating the target function by using a Sigmoid function, and mapping the value of the target function to a predetermined interval; and calculating a gradient based on the modulated target function and iteratively updating the speed model until a termination condition is met, and outputting a final model. According to the method, the smooth saturation and bounded output characteristics of the Sigmoid function are utilized, the target function response is converted into a self-adaptive gradient scaling mechanism, a self-stabilization optimizer is introduced for the inversion process, and the convergence domain is widened by applying smooth constraint, so that the dependence on the initial model precision is reduced, and the first success rate and the result reliability of inversion under complex conditions are improved.

The present invention provides a method for determining the safety status of a buried gas pipeline by surface vibration velocity. The method calculates the on-site P-wave and S-wave velocities to obtain the time difference between the time when the P wave arrives at the surface monitoring point and the time when the direct P wave, the reflected P wave, and the reflected SV wave arrive at the buried gas pipeline; the vibration velocity of the direct P wave, the reflected P wave, and the reflected SV wave is obtained by calculating the reflection coefficient and time difference of the vibration wave, and the vibration velocity of the soil beside the buried gas pipeline is obtained by vector calculation, and the empirical coefficient of the difference in vibration velocity between the soil around the buried gas pipeline and the pipeline is obtained by numerical simulation calculation, and then the vibration velocity threshold of the buried gas pipeline is obtained, and compared with the theoretical threshold of the buried gas pipeline, so as to judge the safety status of the buried gas pipeline. The patent of the present invention can judge the safety status of the buried gas pipeline by monitoring the surface vibration velocity, and has high economic value and strong practicality.

The invention relates to the technical field of seismic exploration, and particularly discloses a VVAZ and AVAZ combined inversion anisotropy parameter calculation method and device, and the method comprises the steps: carrying out the VVAZ inversion of a five-dimensional pre-stack gather, and obtaining an anisotropy parameter delta; carrying out residual time difference correction on the five-dimensional pre-stack gather to obtain a corrected five-dimensional pre-stack gather; aVAZ inversion is carried out on the corrected five-dimensional pre-stack gather, and anisotropic fracture parameters are obtained; based on logging information of the work area, elastic parameter inversion is carried out on the corrected five-dimensional pre-stack gather, and the longitudinal and transverse wave velocity ratio of the work area is obtained; and solving anisotropy parameters delta N and delta T based on the anisotropy parameter delta, the anisotropy crack parameter and the longitudinal and transverse wave velocity ratio. According to the method, rapid solving of fracture anisotropy parameters deltaN and deltaT is achieved by utilizing the solving relation of anisotropy parameters of VVAZ and AVAZ and the relation among the Thomsen anisotropy parameter delta, the Schobergn anisotropy parameters deltaN and deltaT and the anisotropy gradient Bani.

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 present invention discloses a method for determining the equivalent design wave of a ship's wave load under level 6 sea conditions, relating to the field of ship structural safety. The method comprises: treating the hull as a variable-section beam, and for a ship at a constant speed, calculating the wave load transfer function at the hull beam section under different wave conditions, wherein the wave conditions include different wave direction angles and different circular frequencies of the incident wave; based on the wave load transfer function at the hull beam section, calculating the short-term predicted extreme values ​​of the wave load under different wave direction angles and different zero-crossing periods within the significant wave height range of level 6 sea conditions; selecting a maximum value from all the short-term predicted extreme values ​​of the wave load, and determining the equivalent design wave parameters of the wave load under level 6 sea conditions based on the maximum value. The equivalent design wave is a sinusoidal regular wave, and its parameters include wave amplitude, circular frequency, and wave direction. By converting the study of the load on the hull under random waves into the study of the hull load under regular waves, this method is of great significance for subsequent research on hull load levels and structural safety.

The utility model provides a spiral conical wave-absorbing structure, which relates to the technical field of wave-absorbing, and comprises a base, a plurality of cone bodies which rotate clockwise to rise or anticlockwise to rise are arranged on the base, and the cross section of each cone body is conical. The spiral conical wave-absorbing structure comprises the base and the cone, a plurality of cones rising in a clockwise rotating mode or in an anticlockwise rotating mode are connected to the base in an inserted mode, electromagnetic waves are propagated in the cones in a spiral mode, and the spiral structures of the cones increase the transmission distance of the electromagnetic waves in materials. The retention time of electromagnetic waves in the material is prolonged, and the loss capability of the material to the electromagnetic waves is improved, so that the wave absorbing performance of the material, especially the absorbing performance of a low-frequency part, is improved.

The invention relates to the technical field of mining data processing, and specifically discloses a method for predicting the height of a water-conducting fracture zone in coal seam stratified fully mechanized caving mining, which is used to solve the problem that the traditional material point method is difficult to accurately capture the fracture expansion path and height. The method uses a microseismic sensor array to monitor the arrival time difference of P waves and S waves of microseismic events in real time, and uses a microseismic event processing host based on the first, second and third equation groups, combined with a stress intensity factor and a fracture expansion speed formula, to calculate the three-dimensional expansion path and cumulative effect of the fracture, and finally uses a fracture zone height prediction formula to comprehensively consider the physical properties of the rock formation and stress data, accurately predict the final height of the fracture zone, and transmit it to an anchor adjustment device for support optimization; the invention significantly improves the accuracy of fracture zone height prediction by calculating the fracture expansion path, speed and cumulative effect, combined with the physical properties of the rock formation and the stress environment, and ensures the safety and real-time monitoring effectiveness during coal seam mining.

The present invention discloses a fracture weakness parameter inversion method, comprising the following steps: S1: acquiring 3CVSP data of a target study area, and processing to obtain an upgoing S1 wave and an upgoing S2 wave; S2: obtaining the P wave velocity and the S wave velocity of the overlying stratum above the target layer according to the first arrival waves of the P wave and the S wave in the logging data and the 3CVSP data; S3: calculating and obtaining the travel time of the target layer at different detectors; S4: picking up the phase axis one closest to the target layer in the upgoing S1 wave according to the travel time, and obtaining the observed PS1 propagation time; S5: using the upgoing S1 wave, extracting the phase axis two of the target layer in the upgoing S2 wave through waveform matching, and obtaining the observed PS2 propagation time according to the travel time corresponding to the phase axis two; S6: establishing an objective function based on the observed PS1 propagation time and the observed PS2 propagation time, and inverting and obtaining the fracture weakness parameter according to the objective function. The present invention can accurately invert the fracture weakness parameter using the propagation time of the PS1 wave and the PS2 wave.

The invention discloses a wave dissipation structure and a revetment, and relates to the field of river revetments. The wave dissipation structure comprises a bank protection retaining wall and a wave dissipation water tank, when the water level of a river channel changes, water flows in and out of the containing space through the water permeable holes, the wave dissipation water tank conducts buoyancy self-adaptive lifting motion, the wave dissipation channel continuously aligns to the wave face, wave energy is dispersed and consumed by floating damping of the wave dissipation channel and the wave dissipation water tank, and therefore the purpose of reducing bank protection impact is achieved. Water flow enters the containing space through the water permeable holes to consume energy and is secondarily broken by the wave dissipation channels of the floating water tank, and the scouring force of ship traveling waves is remarkably weakened. The self-adaptive water level fluctuation design solves the problems that a traditional retaining wall with the fixed height is insufficient in wave dissipation at a high water level and shields sight at a low water level; the water area and the land landscape plant area are communicated through the wave dissipation channel, the ecological connectivity is improved, water exchange and biological migration are promoted, and the ecological blocking problem of a hard structure is solved.

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.

The utility model relates to the technical field of geothermal wells, in particular to a damping ring for damping of a geothermal well, which comprises a circular annular shell, a plurality of damping mechanisms are arranged in the annular shell, and the damping mechanisms are uniformly distributed in the annular shell and are symmetrically arranged in pairs along the radial direction of the annular shell; the damping mechanism comprises a plurality of longitudinal damping assemblies which are longitudinally arranged and a plurality of transverse damping assemblies which are horizontally arranged, the longitudinal damping assemblies are used for conducting damping and energy dissipation on vibration generated by P waves in seismic waves, and the transverse damping assemblies are used for conducting damping and energy dissipation on vibration generated by S waves in the seismic waves. Vibration caused by P waves and S waves in an earthquake can be subjected to vibration reduction and energy dissipation treatment, and the anti-seismic performance of the geothermal well is effectively improved.

The present application provides a kind of ground shallow well microseismic monitoring event identification technology, device, equipment and medium.The identification method includes: based on the three-dimensional space scanning horizontal direction and depth direction of S wave, the event energy superposition value of each grid point at each time is obtained, and the multi-channel superposition value S (t) is calculated;The maximum value of the event energy superposition value of each grid point in space at each time is obtained, and the maximum value of the multi-channel superposition value S (t) of each point at each time is updated as M (t);The envelope B (t) of M (t) is calculated by Hilbert transform, and the maximum value of M (t) greater than B (t) in fixed time window is detected as the event in the time window.The present application establishes the microseismic judgment criterion of three-dimensional space P-S wave multi-channel superposition according to the ground shallow well microseismic monitoring mode and the three-component recording characteristics, realizes the automatic detection of microseismic event based on event similarity method, the operation speed is fast, the efficiency is high, and the microseismic event can be detected automatically and quickly.

The invention belongs to the field of rock-soil earthquake engineering, and particularly relates to a method for evaluating the anti-seismic performance of an end bearing pile in stratified soil under the action of earthquake S waves. According to the method, a pile-soil model is established on the basis of a continuous medium theory under a linear elastic frame, and displacement of a free field and a scattered field of a soil body is decoupled through a Helmholtz decomposition method; the soil layer boundary is processed by adopting the orthogonality of a modal function characteristic function, and the motion response of the pile foundation is described by adopting a strict closed form solution. Frequency domain amplitude-frequency characteristic analysis is adopted, a motion corresponding coefficient and a motion amplification coefficient are introduced to quantitatively evaluate the influence of the soil layer thickness and the soil layer rigidity ratio on the anti-seismic performance of the end bearing pile, and theoretical support is provided for pile foundation optimization design.

The invention provides a line earthquake early warning system evaluation parameter acquisition method and a related product, and relates to the technical field of earthquake early warning. The method comprises the following steps: according to an epicenter position parameter, a line position parameter and an S wave propagation rate, determining an influence starting moment and an influence ending moment of an earthquake S wave on a line and position mileage parameters of the line influenced at each moment between the influence starting moment and the influence ending moment; in a line mileage-time coordinate system, determining a first integral region of a position mileage parameter of an affected line from an influence starting moment to an influence ending moment, and a second integral region of a line early warning line section from an early warning moment to the influence ending moment; and determining early warning effect evaluation parameters of the line earthquake early warning system according to the overlapping proportion of the first integral region and the second integral region. According to the invention, comprehensive evaluation of the accuracy and timeliness of the line earthquake early warning system is realized.

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.

The present invention provides a novel one-dimensional dual-material periodic foundation optimization design method, and studies the factors that affect the vibration isolation effect of the one-dimensional dual-material periodic foundation on a crushed stone base, namely, the coupling effect of the upper structure, the number of units and the band gap. Based on the band gap approximate analytical formula, by ensuring that the compressive strength FRS of the upper structure is quite mild at any frequency under consideration, each series resonance zone RZ is covered by the corresponding band gap BG, and for all potential designs that meet the above requirements, the maximum energy function PF (h1, h2) is satisfied, thereby achieving a good design of the one-dimensional reinforced concrete periodic foundation. The superiority of the present invention is verified by comparing the vibration reduction performance with that of the traditional design method. For the cases of S waves and P waves, the present invention is significantly better than the concrete foundation and the benchmark foundation. In addition, the vibration attenuation performance of the optimal design foundation for S waves is very outstanding. If the configuration can strictly follow the results obtained by the proposed method, it is expected that the attenuation effect of the optimal design foundation will be better.

The invention provides a high-speed wave head penetrating ship, and relates to the field of ship engineering, the high-speed wave head penetrating ship comprises a high-speed wave head penetrating ship and a stem post, the bottom edge is in a micro-oval shape, the top is in an inverted triangle shape, the high-speed wave head penetrating ship protrudes towards the head, the side view geometric feature is in a cutting edge shape, and the stem post is of a forward-inclining type structure, a backward-inclining type structure and a vertical type structure. According to the method, the high-speed wave piercing head is designed into a specific geometrical shape, the size of the high-speed wave piercing head meets the cross section area curve distribution requirement of the whole ship, the head protruding length is related to the wavelength and the speed, and the cross section fat and thin degree meets the design parameters of the molded line inflow section, so that the wave-making resistance and the shape resistance during ship navigation are effectively reduced; meanwhile, the seakeeping performance of the ship in the waves is improved, the pitching amplitude, wave attack and splashing are reduced, stall in the waves is reduced, the excellent and comprehensive sailing performance is achieved, the dual technical advantages of high sailing speed and high seakeeping performance are achieved, and the ship is particularly suitable for the high-speed ship in the transition state.

The utility model discloses a counter flow type cooling tower, which comprises a frame structure and a cooling tower body arranged on the frame structure, an air duct, a water collector, a water distribution system and a filler are sequentially arranged along the cooling tower body from top to bottom, a fan is arranged in the air duct, the filler comprises a filler layer with an S-wave-shaped surface, and the surface of the filler layer is provided with a water inlet and a water outlet. The wave crest and the wave trough of the S wave form are arc-shaped, and the extending direction of the S wave is consistent with the water flow direction and the air flow direction; according to the utility model, not only is the heat exchange efficiency higher, but also dirt, impurities or sediments are not easy to accumulate between wave crests and wave troughs of the filler, water flow blockage caused by blockage is avoided, and the cooling efficiency is ensured.