339 results about "Wave impedance" patented technology

The invention provides a distribution line fault location optimization method based on single-ended traveling wave location, and relates to the technical field of traveling wave detection. The method comprises the following steps: carrying out segmented modeling on a line, calculating the traveling wave propagation speed and wave impedance of each segment, and correcting the traveling wave propagation speed and wave impedance; collecting a voltage / current traveling wave signal of a detection point, and extracting a line mode component; performing wavelet transformation on the line mode component, detecting the wave head position of the initial traveling wave through a modulus maximum search algorithm, and recording the arrival time of the initial traveling wave, a corresponding first energy value and polarity; calculating a reflected wave time window based on segmented modeling parameters, screening reversed polarity waves with qualified energy attenuation, and calculating a fault distance; if no effective reflected wave is detected in the reflected wave time window, triggering a pseudo double-end mode; a result is verified through quadruple constraints; the problems of poor parameter adaptability, low signal processing precision, strong reflected wave dependence and incomplete verification in traveling wave distance measurement of a complex distribution line are solved, and the accuracy and reliability of fault distance measurement are improved.

The invention discloses a rubber product quality detection method and system, and relates to the related technical field of rubber quality detection.The method comprises the steps that rubber products are conveyed to a target detection table, and data acquisition of the rubber products is executed; inputting the wave impedance distribution data and the surface heat distribution gradient field into a defect causal atlas channel to execute phase inversion fusion processing, establishing a cross-modal coupling phase tensor, and identifying deep defect response characteristics by solving a phase difference matrix; activating a pressure spectrum sensing unit to apply control pressure, reading a local mechanical response spectrum, sending the local mechanical response spectrum to a cross-modal calibration layer, and executing joint error authentication; and performing quality detection report according to a self-calibration defect mapping result. The technical problems that in the prior art, multi-modal sensing data fusion efficiency is low, deep defects are difficult to comprehensively recognize, and consequently the quality detection precision and reliability of rubber products are insufficient are solved, and the technical effects that cross-modal cooperative detection is achieved, and the precision and reliability of defect recognition results are improved are achieved.

The invention relates to an ultra-high voltage line lightning resistance level evaluation method and device based on a tower head gap structure. The method comprises the following steps: constructing a simulation model according to line structure information and electrical parameters of an extra-high voltage line and tower structure information of a power transmission tower; inputting lightning current waveform parameters and lightning channel wave impedance parameters of the extra-high voltage line into the simulation model to obtain voltage distribution information and current propagation characteristic information of the extra-high voltage line under a lightning stroke condition; flashover criterion information is determined according to the insulator string discharge voltage characteristic information and the tower head air gap breakdown voltage characteristic information of the extra-high voltage line; and according to the voltage distribution information, the current propagation characteristic information and the flashover criterion information, determining a lightning resistance level evaluation result. By adopting the method, the influence of the breakdown characteristic of the tower head air gap, the complexity of the tower structure and the dynamic characteristic of lightning current propagation on the lightning resistance level evaluation can be comprehensively considered, and the accuracy of the lightning resistance level evaluation result of the extra-high voltage line is improved.

The invention provides a coal mine fluidized mining dynamic disaster prevention and control method and system, and relates to the technical field of disaster prevention and control. The method comprises the following steps: establishing a risk map based on mining area multi-field information, setting a seismic source intensity upper limit, a path attenuation target and an energy absorption displacement target, implementing in-situ transformation under the constraint of a control index to form a distributed micro-fracture network, and calculating a residual dynamic load spectrum to weaken a seismic source; according to the residual dynamic load spectrum, constructing an artificial barrier and an energy absorption band with wave impedance abrupt change so as to realize propagation energy reduction; a flexible energy absorption protection system is configured according to the residual dynamic load spectrum and the propagation attenuation coefficient, micro-seismic, stress and displacement data are monitored in real time, and parameter self-adaptive correction is achieved through linkage treatment triggered by a threshold value. According to the method, a source-diameter-field integrated active prevention and control system is constructed, dynamic regulation and control and closed-loop management in the fluidized mining process are achieved, and the intrinsic safety and the intelligent level of deep mining are remarkably improved.

The invention discloses a semantic tag generation method based on a power grid engineering corpus, particularly relates to the technical field of power grid system fault analysis, and is used for solving the problem that the existing semantic tag technology cannot accurately represent dynamic association and physical propagation paths of composite events. Equivalent traveling wave propagation delay of an event entity is extracted based on an electromagnetic transient waveform, and a sequential relation graph is constructed to restore a fault dynamic evolution process; establishing a physically interpretable causal chain hierarchical structure through equipment topology path matching and wave impedance gradient difference analysis; a gradient clustering algorithm is adopted to adaptively adjust label granularity confidence, noise interference is eliminated, and a key propagation path is reserved; and finally outputting a versioned label set fusing the dynamic causal chain, the traveling wave propagation time delay and the equipment physical association path, and forming a closed-loop modeling mechanism of event space-time association and equipment topology linkage.

The invention relates to the technical field of lightning current measurement, in particular to a wireless measurement method for a high tower wave impedance real-model test. According to the technical scheme, the method comprises the steps that a three-dimensional model with the size proportion of 1: 1 to an actual tower is established in simulation software based on structural parameters of the actual tower, and the model is segmented; and applying a standard lightning current signal to the tower top of the three-dimensional model in simulation to obtain a simulation voltage value of each section of tower. A traditional potential line is replaced by the wireless measurement module, coupling interference is eliminated, and the wave impedance measurement precision is remarkably improved; the trigger voltage is pre-judged by adopting sectional type wireless networking and simulation, so that field wiring is simplified, and the test period is shortened; the system is suitable for high-rise towers of different heights and structures, stable data transmission in a complex environment is ensured in combination with a wireless transmission system deployed in a layered mode, meanwhile, the electrical characteristics of the towers under transient lightning current are accurately captured, and a reliable basis is provided for lightning protection design and electromagnetic compatibility optimization.

The invention discloses a power distribution cable fault processing method and device, electronic equipment and a storage medium, and relates to the technical field of power distribution cable fault processing, and the method comprises the steps: firstly collecting multi-mode fault signals, such as a high-frequency traveling wave signal, an ultrasonic partial discharge signal and an environment parameter signal, of a power distribution cable; and distribution network topological structure information such as line length, branch number, node position, wave impedance parameters and the like is synchronously obtained. Then high-frequency traveling wave features are extracted, a positioning strategy is determined according to the number of line branches, and fault position coordinates are obtained in cooperation with the traveling wave features and topological information. Then partial discharge features and environment features are extracted respectively, the three types of features are fused to form a fusion feature set, the feature set is analyzed through a fault classification model optimized by the improved whale algorithm, and fault type information is obtained. And finally, associating fault positions and types, generating a fault processing scheme containing a positioning result, fault causes and operation and maintenance priorities, and realizing accurate positioning, classification and operation and maintenance guidance of the distribution cable faults.

The invention discloses a mining area disaster control-oriented dual-stage scheme construction method, and relates to the technical field of mine safety engineering, and the method comprises the following steps: S100, constructing a high-resolution multi-mode joint detection system, and carrying out the cooperative arrangement of a seismic wave array and an electrical method profile, and synchronously collecting the wave impedance response and electrical property anomaly characteristics, and obtaining a physical anomaly information set covering full depth. According to the method, through multi-mode joint detection and heterogenous data fusion, the precision and integrity of deep structure recognition are improved, and in combination with geological evolution reasoning and dynamic inversion, recognition blind areas are complemented, and accurate positioning of high-risk disaster-causing units is realized. Based on matching of a disaster index model and a parameterization strategy, automatic mapping of disaster partition and a treatment scheme is achieved for the first time, scientificity, targeting and resource allocation efficiency of disaster treatment are remarkably improved, and the method has important engineering application and popularization value.

The invention provides a meteorological station power supply line lightning stroke fault positioning method, system and device and a medium. The method comprises the following steps: firstly, synchronously acquiring transient voltage and current traveling waves based on a preset multi-stage lightning protection area boundary to obtain multi-source transient data; performing cross-measuring-point fusion reconstruction on the acquired multi-source transient data, and marking waveform characteristics of the boundary of the protection area to obtain effective waveform data; then, calculating dynamic wave impedance, and determining a wave impedance break variable in combination with a boundary impedance calibration value; and through the reconstructed effective voltage waveform data or effective current waveform data, the traveling wave arrival time is calibrated by adopting a frequency-variable wave velocity model and wavelet transform. And finally, determining the positioning value of the lightning stroke fault at the access point of the meteorological station terminal equipment according to the frequency-varying wave velocity, the calibrated traveling wave arrival time and the wave impedance break variable, and outputting the position information of the lightning stroke fault in the multi-stage lightning protection area in combination with a preset multi-stage lightning protection area boundary position mapping table. According to the scheme, the lightning stroke fault can be accurately positioned in the multi-stage lightning protection area.

The invention provides an identification method for measuring fundamental wave pseudo oscillation by a low-sampling-rate measurement and control device, which belongs to the field of electrical measurement and comprises the following steps of: calculating an impedance deviation coefficient of a capacitor fundamental wave impedance value relative to a capacitor actual impedance value; searching effective maximum values and minimum values of the impedance deviation coefficients, taking the effective maximum values of the adjacent impedance deviation coefficients as analysis intervals, and calculating corresponding oscillation frequencies according to time differences of the analysis intervals; the maximum value and the minimum value threshold value of the impedance deviation coefficient corresponding to the oscillation frequency of each analysis interval are calculated, and the authenticity of measurement oscillation of the measurement and control device is identified according to the relation between the effective maximum value and the minimum value of the impedance deviation coefficient and the corresponding threshold value; the invention further provides a fundamental wave pseudo oscillation identification system measured by the low-sampling-rate measurement and control device. The risk of misjudgment caused by measurement pseudo oscillation of a low-sampling-rate measurement and control device due to high-frequency harmonic aliasing can be solved.

The invention discloses a dam disease three-dimensional nondestructive detection method, a storage medium and computer equipment, and relates to the technical field of geophysical detection.The dam disease three-dimensional nondestructive detection method mainly comprises the steps that a seismic source and a detector are used for detecting a target dam to obtain seismic data; obtaining first arrival travel time by using an improved self-correlation constraint energy ratio method, constructing an underground medium wave impedance initial model by using a back projection algorithm, performing forward modeling calculation to obtain theoretical travel time, and correcting an average slowness value in each grid by using a joint iteration method to obtain a corrected underground medium wave impedance model; and stopping iteration when the iteration is ended to obtain a dam disease three-dimensional nondestructive detection result. By implementing the dam disease three-dimensional nondestructive detection method, the storage medium and the computer equipment provided by the invention, the position of a dam hidden danger can be quickly, efficiently and accurately detected.

The invention discloses a frequency domain ground penetrating radar pipe leakage detection method and system, and relates to the technical field of pipeline leakage detection, and the method comprises the steps: employing a frequency domain ground penetrating radar to carry out the whole pipe segment detection of a pipeline, and obtaining an original electromagnetic wave signal; preprocessing the original electromagnetic wave signal to obtain an echo signal; extracting time-frequency domain features of the echo signals, and screening the time-frequency domain features; identifying the screened time-frequency domain features by using a leakage identification model to obtain suspected leakage pipe sections; starting a microwave impedance measuring device at the position of the suspected leakage pipe section to obtain a reflection signal; and determining the axial position and the radial position of the leakage point according to the reflection signal. According to the method, the frequency domain ground penetrating radar is adopted for primary screening of the whole pipe section, after the suspected leakage pipe section is recognized, the microwave impedance technology is utilized for fine recognition, the wire for impedance measurement is only arranged in the high-risk pipe section, construction and use convenience is improved, and meanwhile the precision of the detection result is improved.

The invention discloses an intrusive rock alteration zone reservoir prediction method comprising the following steps: S1, analyzing and identifying sensitive logging parameters of an intrusive rock alteration zone, and establishing a dominant lithology identification combination chart; s2, establishing a model, and determining seismic response characteristics of intrusive rocks; s3, quantitative evaluation is carried out on the intrusive rock; s4, reservoir prediction of the intrusive rock alteration zone is carried out; and S5, quantitatively predicting the reservoir distribution and thickness of the intrusive rock alteration zone. According to the method, through different lithologic logging response characteristics, a multi-parameter intersection advantage lithologic chart is established, wave group characteristics of intrusive rocks are determined, and the distribution range and thickness of the intrusive rocks are identified by utilizing wave impedance inversion and optimizing attributes of a product of a reflection intensity alternating current component and a phase cosine; and waveform indication inversion of the invaded rock mud shale alteration zone is carried out by using natural potential as a characteristic curve, and reservoir distribution and thickness of the invaded rock alteration zone are predicted and are basically consistent with actual drilling thickness.

The invention provides a method and a device for determining a fracture fluid indication factor of a deep coal bed gas reservoir, and relates to the technical field of deep coal bed gas exploration. The method comprises the following steps: firstly, constructing a deep coal bed gas reservoir approximate PP wave reflection coefficient equation directly expressed by six reservoir parameters including wave impedance, longitudinal wave velocity, shear modulus, anisotropic parameters, fracture fluid indication factors and fracture tangential weakness; then, a target functional used for inverting reservoir parameters of the deep coalbed methane reservoir is constructed in combination with synthetic azimuth gather seismic data of the deep coalbed methane reservoir of the target work area, and finally, the fracture fluid indication factor of the deep coalbed methane reservoir can be directly inverted by solving the target functional. According to the method, the problem of error accumulation existing in indirect inversion of the fracture fluid indicator factor is avoided, so that the technical problem of poor inversion result accuracy existing in an existing determination method of the fracture fluid indicator factor of the deep coal bed gas reservoir can be effectively relieved.

The invention discloses a frequency-dependent fluid mobility inversion method and device, belongs to the technical field of seismic exploration, and solves the problem that a fluid mobility result extracted by an existing time-frequency analysis method is difficult to directly reflect real physical distribution of a reservoir. The method comprises the following steps: acquiring seismic data including multiple seismic post-stack records and relative wave impedance; the number of frequency bands needing to participate in inversion and the frequency range corresponding to each frequency band are set, continuous wavelet transform is carried out on each seismic post-stack record, and a continuous wavelet transform result is inversely transformed to a time domain to obtain seismic frequency division data needing to participate in inversion; calculating a fluid mobility coefficient of the reservoir according to a logging curve obtained by logging, and interpolating the fluid mobility coefficient into a low-frequency model; and based on the relative wave impedance and the L2 regularization constraint, establishing a fluid mobility inversion equation, substituting the seismic frequency division data, the low-frequency model and the relative wave impedance into the established fluid mobility inversion equation, and solving a mobility inversion result recorded after each seismic stack by using gradient descent.

The invention provides a deep and far sea wind power plant area lightning dynamic parameter inversion method and device, and relates to the technical field of lightning protection, and the method comprises the steps: building a fan return stroke model based on current reflection caused by the wave impedance discontinuity of a fan top, a return stroke channel and a fan bottom grounding position, obtaining an initial propagation model of the electromagnetic field along the sea-land mixed path by combining the surface equivalent impedance of the sea surface and the land of the observation point zone; correcting the initial propagation model through electromagnetic field influence parameters to obtain a target propagation model; inputting a radiation source signal received by an array into the target propagation model for waveform time sequence inversion processing to obtain a corresponding time reversal signal; the time reversal signals in different directions are superposed and focused to obtain the peak azimuth, and the three-dimensional positioning of the lightning radiation source is carried out in combination with the positioning result of the double stations, so that the lightning development spatial-temporal distribution law is determined, and the measurement precision of the lightning leader development speed is remarkably improved.

The invention discloses a negative conical wave-absorbing honeycomb, which comprises a negative conical impedance matching layer, an absorbing layer and a reflecting layer, and is characterized in that the negative conical impedance matching layer, the absorbing layer and the reflecting layer respectively comprise at least one honeycomb layer, and the honeycomb apertures of the negative conical impedance matching layer, the absorbing layer and the reflecting layer are sequentially decreased; the negative tapered impedance matching layer surface includes at least one negative tapered slot. According to the scheme of the invention, when electromagnetic waves are incident to the honeycomb, the negative conical shape design ensures that two surfaces are always in an oblique incidence state in the polarization direction, scattering of the electromagnetic waves is enhanced, reflection is reduced, impedance matching with airwaves is enhanced, the electromagnetic waves are made to be incident into the material to the greatest extent, and the electromagnetic waves are prevented from entering the material to the greatest extent. Multiple times of reflection and refraction of electromagnetic waves in the negative conical structure are increased, electromagnetic wave energy radiated out is effectively reduced, and efficient broadband absorption of the electromagnetic waves is achieved.

The invention relates to the technical field of geophysical exploration, in particular to a deep learning wave impedance inversion method and system based on a virtual well, and the method achieves the high-precision inversion from seismic data to wave impedance parameters through building the statistical relation between lithology and wave impedance and combining the powerful nonlinear mapping capability of a neural network. And a reliable technical means is provided for underground reservoir prediction. A large amount of virtual well data is generated based on a small amount of real wave impedance real well data, so that deep learning network training is facilitated; the parameters do not need to be greatly adjusted; according to the method, a large amount of virtual well data is generated, the trained model has strong generalization ability and an accurate inversion effect, complex parameter adjustment is not needed in the training process, and the method has high applicability.

The invention provides a resonance control method for an excimer lamp driven by a steep pulse edge, and relates to the technical field of molecular lamps. The resonance control method of the excimer lamp driven by the steep pulse edge comprises the following steps: S1, based on a dielectric barrier discharge equivalent circuit model, adopting a fast Fourier transform spectrum analysis method, measuring fundamental wave impedance characteristics of an LC resonance network through an impedance analyzer, establishing a transfer function containing parasitic parameters: Z (s) = [sLr + 1 / (sCr)] Rarc, and generating an initial resonance parameter set; by establishing a transfer function model containing parasitic parameters, combining fast Fourier transform spectrum analysis and accurately extracting fundamental wave impedance characteristics, the problem of resonance point offset caused by neglecting the parasitic parameters in a traditional method is solved, the precision of an initial resonance parameter set is improved, real-time phase difference data are identified on line by using a recursive least square method, and the real-time phase difference is obtained. Resonant frequency changes are dynamically tracked, frequency drift errors are compensated, resonance point tracking precision is controlled within + / -0.1%, and invalid discharge energy loss is remarkably reduced.

An electronic device may include signal transmission circuitry having a signal path and a signal source that transmits a signal on the signal path. First and second signal couplers may be coupled to the signal path. Control circuitry may use the first signal coupler to measure the signal at a first reference plane and may use the second signal coupler to concurrently measure the signal at a second reference plane. The signal measurements may include power wave, forward wave, reverse wave, impedance, and / or delivered power measurements. Terminations in the signal couplers may be adjusted to dynamically shift the reference planes. The first and second signal couplers may be formed from first and third metallization layers on a stacked dielectric substrate, where the signal path is formed from a second metallization layer. Additional signal couplers may be coupled to the signal path for concurrently measuring additional reference planes.

The invention discloses a power transmission line double-end traveling wave distance measurement method independent of synchronous time synchronization and a related device, and belongs to the technical field of power transmission line traveling wave distance measurement. Carrying out modulus decomposition on the traveling wave electrical quantity to obtain a line mode component and a zero mode component which are independent from each other; calculating line mode wave impedance and zero mode wave impedance based on the frequency change parameters of the power transmission line; calculating to obtain a line-mode inverse traveling wave and a zero-mode inverse traveling wave; discrete wavelet transform is carried out, and the arrival time of a wave head is obtained through detection; for a grounding fault, calculating a fault distance based on a difference value between a line mode wave head arrival time and a zero mode wave head arrival time; for an ungrounded fault, a fault distance is calculated based on a difference value between arrival moments of a traveling wave at the same end and a reflected wave at a fault point. According to the method, the absolute time is replaced by the time difference, the influence of the wave velocity is eliminated through ratio calculation, strict synchronous time synchronization at the two ends is not needed any more for the ground fault and the non-ground fault, and the effectiveness of distance measurement is improved.

The invention discloses a diffracted wave impedance inversion method based on full wave field information, and the method comprises the steps: carrying out the diffracted wave separation of full wave field original seismic data, and obtaining reflected wave seismic data and diffracted wave seismic data; converting an interval velocity body obtained by processing the full-wave-field original seismic data to obtain an interval velocity low-frequency impedance body; determining a corresponding relation between the full-wave-field original seismic data and the synthetic seismic data in-phase axes, and extracting a comprehensive wavelet; under the constraint of the logging data and the interval velocity low-frequency impedance body, based on the comprehensive wavelet, a post-stack impedance inversion method is adopted to perform inversion on the full-wave-field original seismic data, and a full-wave-field absolute impedance body is obtained; under the constraint of a layer velocity low-frequency impedance body, based on the comprehensive wavelet, a post-stack impedance inversion method is adopted to invert the reflected wave seismic data, and a reflected wave relative impedance body is obtained; and removing the reflected wave relative impedance body from the full wave field absolute impedance body to obtain the diffracted wave absolute impedance body. According to the method, the wave impedance inversion precision of the heterogeneous reservoir can be improved.

The invention relates to the technical field of geological disaster assessment, in particular to a seafloor landslide mass stability assessment method based on multi-source geophysical data, which comprises the following steps: S1, acquiring multi-beam sounding, side-scan sonar, seafloor seismograph and sediment columnar sample data, completing space-time registration, and performing equivalent density conversion on acoustic wave impedance and shear wave velocity to obtain an acoustic wave impedance and shear wave velocity; constructing a three-dimensional grid model; s2, based on the three-dimensional grid model, calculating a curvature mutation index by adopting sliding window Fourier analysis, calculating a pressure gradient in combination with pore water pressure data, and generating a characteristic parameter matrix composed of density, curvature and pressure gradient; and S3, based on the characteristic parameter matrix, calculating shear strain energy and gravitational potential energy superposition field intensity, and generating a landslide mass stability map taking the instability probability as an index. According to the invention, a visual three-dimensional landslide mass stability map is constructed, and high-precision identification and three-dimensional early warning of submarine landslide risks are realized.

The invention discloses a diffracted wave-based heterogeneous body prediction method, electronic equipment, a storage medium and a diffracted wave-based heterogeneous body prediction device. The method comprises the following steps: acquiring a diffracted wave three-dimensional seismic data volume, a horizon of a target interval and a comprehensive wavelet based on a full-wave-field three-dimensional seismic data volume; constructing a longitudinal wave velocity and density conversion relation based on the logging longitudinal wave velocity and the corresponding density, and further constructing a longitudinal wave velocity and longitudinal wave impedance conversion relation to convert the interval velocity of the full-wave-field three-dimensional seismic data volume into interval velocity low-frequency impedance; constructing a diffracted wave impedance inversion objective function based on the longitudinal wave diffraction coefficient and the comprehensive wavelet, and taking the interval velocity low-frequency impedance body as the background impedance of the inversion objective function; and solving the diffracted wave impedance inversion objective function based on an optimization algorithm, carrying out diffracted wave impedance inversion, and obtaining diffracted wave impedance to carry out heterogeneous body prediction. Quantitative prediction of the heterogeneous body is realized through the diffracted wave three-dimensional seismic data body, and the impedance inversion precision of the heterogeneous reservoir is improved.

The application provides a kind of ice constant temperature dynamic mechanical property testing device, belongs to ice detection technical field, including launch subassembly, impact lever, incident support, incident lever, sample support, transmission support, transmission lever, data acquisition module and data processing module, the end face of impact lever towards incident lever is equipped with several spaced convex structures, the end face of incident lever towards impact lever is equipped with shaping piece, shaping piece is used to extend the rising time of incident stress wave that incident lever transmits to ice sample, the end face of incident lever towards ice sample is equipped with wave modulation module, wave modulation module is used to realize the wave impedance continuous gradient matching of incident stress wave from incident lever to ice sample, data processing module corrects the data collected by data acquisition module to obtain final incident wave strain and final transmission wave strain, and calculates the strain rate, stress and strain of ice sample.The application scheme improves the accuracy of ice constant temperature dynamic mechanical property test results.

A method for detecting natural gas reservoirs using amplitude-frequency modulation is disclosed. The method comprises the following steps: acquiring seismic data; decomposing the seismic data using time-frequency analysis techniques to obtain a number of data subsets; performing wave impedance inversion on each of the data subsets using sparse pulse inversion techniques; calculating the mean square error function of the wave impedance for each frequency band; and performing amplitude-frequency modulation on the seismic data using the mean square error function. The present application provides a method for detecting natural gas reservoirs using amplitude-frequency modulation. This method uses a multi-scale inversion method based on time-frequency analysis to extract an indicator factor related to frequency dispersion. This factor is used to automatically modulate reflection intensity, thereby weakening the influence of other factors on reflection intensity, highlighting seismic reflection characteristics related to gas content, and enhancing the accuracy of geophysical detection of gas-bearing reservoirs.

The invention provides a seismic inversion method based on horizontal well information explicit constraint and a related device. The method comprises the following steps: calculating corresponding wave impedance data by acquiring longitudinal wave velocity curve and density curve data of a whole well section of a horizontal well in a target work area; generating a synthetic seismic record according to the longitudinal wave impedance data corresponding to the vertical well section and the longitudinal wave impedance data corresponding to the inclined well section, and performing well-seismic calibration to obtain a well-seismic calibration result; establishing a logging response forward modeling equation set by combining the wave impedance data; establishing a seismic response forward equation set according to the convolution theoretical model; forming a well-seismic combined vertical wave impedance forward modeling equation set by combining the two equation sets; constructing a low-frequency longitudinal wave impedance model according to the well seismic calibration result, the wave impedance data and preset seismic horizon interpretation; performing seismic inversion on the well-seismic combined vertical wave impedance forward equation set and the low-frequency longitudinal wave impedance model by using a Bayesian inversion theory to obtain a wave impedance inversion solution; therefore, the accuracy of seismic inversion is improved.

The invention relates to the field of anti-explosion and anti-impact materials, and discloses an underwater anti-explosion and anti-impact flexible composite material which is characterized in that the structure of the composite material is sequentially composed of a high-strength flexible outer layer, a high-energy absorption middle layer and a high-strength flexible inner layer. The high-strength flexible outer layer is made of a single-layer or multi-layer high-performance fiber material with the wave impedance within the range of 1.4 * 10 < 4 >-3 * 10 < 4 > MPa.s / m, the high-energy absorption middle layer is made of a foam material with the wave impedance within the range of 0.1-1.5 MPa.s / m, and the high-strength flexible inner layer is made of a single-layer or multi-layer high-performance fiber material with the wave impedance within the range of 1.4 * 10 < 4 >-3 * 10 < 4 > MPa.s / m. Based on the wave impedance mismatch theory, the high-strength flexible outer layer, the high-energy absorption middle layer and the high-strength flexible inner layer are combined together through the design of the multi-layer composite structure, so that the composite material can provide excellent impact resistance and can effectively absorb and dissipate impact energy.

The embodiment of the application provides a power amplifier circuit, a radio frequency front end module and a communication device, relates to the technical field of electronics, and is used for improving the saturation power and saturation efficiency of the power amplifier circuit. The power amplifier circuit adopts an impedance matching network architecture of series connection of a capacitor and an inductor in at least one branch (which can be a main power amplifier branch or a peak power amplifier branch). Under the architecture, the fundamental wave impedance and the harmonic impedance of the branch are both adjusted by the series connection capacitor and inductor network. However, since the capacitance of the capacitor and / or the inductance of the inductor can be changed, the fundamental wave impedance is fixed, and the second harmonic impedance is changed. That is, when the second harmonic impedance is adjusted in a wideband range, the fundamental wave impedance can not be affected. Based on this, by reasonably selecting the capacitance of the capacitor or the inductance of the inductor, the fundamental wave impedance and the second harmonic impedance in the branch can meet the requirements respectively, so that the power amplifier circuit has relatively optimal saturation power and saturation efficiency.

The present application relates to a kind of seismic wave impedance diffusion inversion method and device, its essence is a kind of from well site to surrounding diffusion layered structure and attribute inversion method.Core is to use well logging curve to carry out layering etc., then carry out well position inversion, simultaneously, to make the result obtained by well logging interpretation and actual seismic record difference minimum, need to be appropriately disturbed by the square wave type calibration layering curve obtained from well logging interpretation, generate hundreds of reflection coefficient curves, to generate synthetic seismic record, find the synthetic record with actual seismic record difference minimum, the horizon etc. corresponding to this best synthetic record is regarded as the best seed solution and diffuses to all around, during diffusion process, by adding time window or horizon to constrain vertical propagation interval, to obtain the inversion optimum value of entire data set, specific flow as shown in Figure 1.The present application improves the precision of thin layer boundary delineation, and has higher potential for thin layer resolution.