240 results about "Reflection coefficient" patented technology

The invention provides a photovoltaic power generation optimization method for a fishing-light complementary site and a related device. The method comprises the following steps: acquiring a photovoltaic panel sunlight angle, a water surface wind speed, a water surface wave height, a water depth, a photovoltaic panel core parameter, a reflector parameter and double-measuring-point actually-measured light intensity data; determining the initial receiving radiation quantity of the photovoltaic panel according to the sunlight angle of the photovoltaic panel, the core parameters of the photovoltaic panel, the parameters of the reflector and the actually measured light intensity data of the double measuring points; according to the water surface wind speed, the water surface wave height, the water depth, the double-measuring-point actually-measured light intensity data and the reflector parameters, the water surface correction reflection coefficient is determined; correcting the initial received radiation quantity of the photovoltaic panel by adopting the water surface correction reflection coefficient to obtain the actual received radiation quantity of the photovoltaic panel; and according to the actually received radiation quantity of the photovoltaic panel, the inclination angle of the photovoltaic panel is adjusted, and then the photovoltaic power generation process of the fishing-light complementary site is optimized. Excessive concentration of local radiation quantity caused by secondary reflection of sunlight through a water surface-reflector can be avoided, and generation of hot spots on the photovoltaic panel is inhibited.

The invention relates to a spherical wave oscillation-slow nuclear high-order decoupling method and device for physical property inversion, and belongs to the field of geophysical detection and acoustic detection. The method comprises the following steps: obtaining and inputting observation data, and initializing seabed elastic parameters; determining an integral interval according to the observation data, decomposing the integral interval into a plurality of sub-intervals, and setting a decoupling order; calculating an oscillation nuclear local integral matrix of each order corresponding to the observation data incident angle; calculating the angle deviation guiding quantity of each order of the slowly-varying kernel; calculating a reflection coefficient vector of each order of spherical wave; calculating a spherical wave reflection coefficient of high-order decoupling; and solving a subsequent inversion problem by using the obtained high-order decoupled spherical wave reflection coefficient. According to the method, the calculation efficiency of the seabed spherical wave reflection coefficient in the inversion process is effectively improved; the decoupling order is improved, the calculation precision is improved, or the number of the subintervals can be reduced by improving the decoupling order under the condition that the calculation precision is certain.

The invention relates to a seabed elastic parameter inversion method, system and device under an earthquake spherical reflection wave oscillation-gradual change nuclear decoupling framework, and belongs to the field of geophysical detection and acoustic detection. The method comprises the following steps: (1) inputting observation data and initializing seabed elastic parameters; (2) determining an integral interval and decomposing the integral interval into a plurality of sub-intervals; (3) calculating an oscillation nuclear local integral matrix corresponding to the incident angle of the observation data; (4) calculating a slowly-varying kernel local mean vector; (5) calculating a spherical wave reflection coefficient of oscillation-gradual change kernel decoupling; and (6) constructing a target function by using the decoupled spherical wave reflection coefficient, and solving the target function. In the objective function solving process, only the steps (4) and (5) need to be repeatedly executed after the seabed elastic parameters are updated, the oscillation nuclear local integral matrix in the step (3) does not need to be repeatedly calculated, redundant calculation about oscillation nuclear integration is avoided, and the calculation efficiency is improved.

The invention discloses a double-probe film thickness and defect collaborative decoupling method. The method comprises the steps that microwave reflection signals of a thermal barrier coating are synchronously collected through a coaxial resonance probe and a CSRR resonance ring probe; the microwave reflection signal comprises reflection coefficient amplitude, reflection coefficient phase and resonant frequency; constructing a frequency deviation model based on the microwave reflection signal; training the dual-channel deep learning network based on the frequency deviation model to obtain a trained dual-channel deep learning network; and obtaining film thickness information and a defect positioning result based on the trained dual-channel deep learning network. According to the method, collaborative decoupling of the film thickness and the defect signal is achieved through a physical-data fusion method, effective decoupling and independent recognition of the coating film thickness change and the defect response signal are achieved, and the resolution ratio, the accuracy rate and the practicability of a detection system are improved.

The invention discloses a three-dimensional ground penetrating radar detection method, system and equipment for road roadbed diseases and a medium, and relates to the technical field of road engineering detection. Controlling a high-frequency antenna and a low-frequency antenna to emit electromagnetic waves to a road roadbed based on the movement of the detection vehicle so as to receive reflected high-frequency data and low-frequency data; processing the high-frequency data and the low-frequency data based on the positioning attitude data to obtain processed high-frequency data and processed low-frequency data; processing and fusing the processed high-frequency data and the processed low-frequency data to obtain a full-band reflection coefficient sequence; calculating the full-band reflection coefficient sequence to obtain broadband geological radar data; inputting broadband geological radar data into the convolutional neural network model to obtain a disease type and a disease semantic segmentation map; and generating a three-dimensional visual model of the roadbed disease based on the disease semantic segmentation map, and outputting maintenance suggestion data matched with the disease type. By implementing the technical scheme, the accuracy of deep hidden disease recognition is improved.

The invention discloses a mechanical non-resonant one-bit phase electromagnetic reflection metasurface unit, and belongs to the field of artificial electromagnetic materials. The unit comprises a non-resonant electromagnetic structure and a mechanical driving device. The non-resonant electromagnetic structure comprises a dielectric layer, an air layer and an adjustable metal backboard from top to bottom; the mechanical driving device adopts a bidirectional self-holding electromagnet, a screw rod of the bidirectional self-holding electromagnet is connected with the metal back plate, the back plate is driven to be switched between two preset positions through forward / reverse pulse current, the thickness of an air layer is accurately adjusted, and therefore one-bit dynamic switching of a reflection phase between 0 degree and 180 degrees is achieved through propagation phase accumulation. In the 5G millimeter wave frequency band of 20 GHz to 29.5 GHz, the reflection coefficients of the two states are both larger than 0.99, the phase difference is stabilized within 180 degrees + / -20 degrees, and good robustness is achieved for mechanical displacement deviation. The unit has the advantages of zero static energy consumption, low insertion loss, wide bandwidth, simple structure and simple control, and is suitable for a low-power-consumption intelligent reflecting surface and a dynamic beam forming system.

A standing wave radar includes: a transmitter to set a frequency of a transmission signal to frequencies, and output the transmission signal taking the respective frequencies in a time-division manner; a receiver to receive a reflected signal taking the frequencies in a time-division manner, the reflected signal being the transmission signal reflected by an object; and a processor to obtain reflection coefficients of the frequencies by obtaining each reflection coefficient of the transmission signal and the reflected signal taking a same frequency, for the transmission signal and the reflected signal taking the frequencies, and to execute a first inverse Fourier transform process of calculating a first distance spectrum for the object by an inverse Fourier transform on the reflection coefficients, and a first distance measurement process of determining presence of the object and calculating a distance to the object, based on the first distance spectrum.

The invention discloses a symbiotic radio system design and optimization method based on multiple active intelligent reflection surfaces. According to the method, high-efficiency backscatter communication is realized while the performance of the main transmission system is enhanced by using the intelligent reflection surface. A plurality of active intelligent reflecting surfaces are configured in the system, the main transmission performance is enhanced, and meanwhile, the active intelligent reflecting surfaces serve as backscattering equipment in turn, and transmission of secondary information is achieved by conducting scattering modulation on incident main signals. The method aims at maximizing the main transmission rate of the system, and jointly optimizes the base station sending power, the active beam forming vector and the reflection coefficient of the intelligent reflection surface. An original non-convex optimization problem is decomposed into a plurality of sub-problems, semi-definite relaxation, continuous convex approximation and other methods are adopted for conversion, and finally an optimal solution is obtained through iterative solution. Compared with a scheme based on a passive intelligent reflection surface and an active intelligent reflection surface scheme based on phase random, a higher main transmission rate can be realized under the condition of ensuring the same secondary symbol signal to interference plus noise ratio.

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.

Quarter-wavelength switchable directional coupler architectures and methods that that use intermediate terminated states during directional mode-switching events to prevent generation of reflection coefficients that cause spur generation. A first embodiment of the invention utilizes existing circuitry within a quarter-wavelength switchable directional coupler but alters the conventional mode-switching sequence by adding new stage sequences to effectuate intermediate terminated states to mitigate or prevent spurs. A second embodiment of the invention modifies existing circuitry within a quarter-wavelength switchable directional coupler by adding a cross-coupled intermediate-stage termination circuit, and alters the conventional mode-switching sequence by adding new stage sequences to effectuate intermediate terminated states to mitigate or prevent spurs. A third embodiment of the invention also modifies existing circuitry within a quarter-wavelength switchable directional coupler by adding dual independent intermediate-stage termination circuits, and alters the conventional mode-switching sequence by adding new stage sequences to effectuate intermediate terminated states to mitigate or prevent spurs.

The invention discloses a cable joint damp degree assessment method and device and a storage medium. The method comprises the steps of obtaining a target reflection coefficient spectrum function corresponding to a target cable; b envelope peaks corresponding to the target reflection coefficient spectrum function are determined; b cable joints corresponding to the b envelope peaks in the a cable joints are determined; converting the target reflection coefficient spectrum function from a frequency domain to a time domain by adopting a preset time-frequency domain conversion algorithm to obtain a target time domain function; determining pulse peak pairs in the target time domain function to obtain b pulse peak pairs; and according to the b envelope peaks and the b pulse peak pairs, determining the damp degrees corresponding to the b cable joints to obtain b damp degrees. According to the embodiment of the invention, the detection precision of the damp degree is improved.

The application discloses a kind of materials electromagnetic performance test methods of measuring reflection and transmission, belong to microwave measurement technology, and measurement system is formed by transceiver antenna, vector network analyzer, computer;The method comprises the following steps: installing the measurement system of measuring reflection and transmission based on space transmission line method;Four measurements are carried out in reflection area, respectively empty load test, reflection test, test piece test, test piece plus backplate test;According to the four groups of reflection coefficients measured, the transmission line parameters related to the transmission field of the material to be measured are calculated, and the transmission field size and phase of the transmission area are calculated according to the transmission line parameters.The application provides a kind of high-precision, non-destructive, easy-to-operate reflection measurement method, which can predict the transmission field distribution of the material to be measured under a specific incoming wave through reflection measurement.

This invention relates to the field of seismic data processing technology, specifically disclosing a method for removing strong reflection shielding in hidden river channels based on adaptive hybrid L0-L1 norm. The method includes: first, establishing an optimization objective function based on Bayes' theorem using hybrid L0-L1 norm; second, dynamically adjusting the L0-L1 norm weights using an adaptive weight function driven by the seismic signal, combined with reflection coefficient amplitude and residual information, enhancing sparsity constraints in strong reflection zones and reducing constraint strength in weak reflection zones; then, constructing a convex upper bound for the objective function using a minimization framework, and solving it iteratively in stages using an accelerated rapid iterative threshold shrinkage algorithm, while incorporating prior knowledge of seismic wave propagation laws and river channel deposition patterns to ensure the geological rationality of the solution. This invention solves the technical problems of traditional sparse processing methods, such as fixed parameters, lack of geological constraints, and inability to simultaneously address strong reflection suppression and weak signal protection, significantly improving the separation accuracy of strong reflections and the recovery rate of weak signals, effectively overcoming the strong reflection shielding effect.

The invention discloses a power distribution cable defect positioning method based on a maximum entropy spectrum method, which comprises the following steps: firstly, establishing a power distribution cable high-frequency distribution parameter model, and determining the influence of insulation aging and mechanical damage on cable distribution parameters; based on a transmission line theory, analyzing a relation between a reflection coefficient spectrum and a defect position, and proposing a reflection coefficient spectrum stepping frequency selection criterion; the defect positioning method based on the maximum entropy spectrum method is provided for the problem that the positioning precision of a traditional FFT method is limited, the maximum entropy spectrum method and the traditional FFT method are compared in a simulation mode, and the superiority of the positioning precision is proved. Experimental results show that the relative positioning error of the maximum entropy spectrum method is not higher than 0.27%. According to the method, accurate inversion of the defect position is realized through prediction of the reflection coefficient spectrum high-frequency component and extraction of the periodic component, so that the defect positioning error is effectively reduced, the accuracy and reliability of defect identification are remarkably improved, and the method is particularly suitable for accurate positioning scenes of long-distance distribution cables and weak insulation defects.

The application discloses a kind of through type radio frequency microwave vector analysis device and method, device includes radio frequency front end and down conversion module, digital acquisition and processing module and control and interactive module.Radio frequency front end and down conversion module are used for the transmission of radio frequency signal, two-way coupling sampling and coherent down conversion;Digital acquisition and processing module are used for collecting signal and processing, obtain pure incident wave signal and reflected wave signal;Control and interactive module are used for controlling each module, and carry out man-machine interaction.The application is realized by using through type measurement architecture, under the premise that the signal transmission of measured system is not interrupted, realizes the online vector analysis of radio frequency signal, and does not need built-in signal source, and then complete vector parameter such as reflection coefficient, impedance, standing wave ratio can be accurately calculated.

Methods and apparatus for generating a codebook for a reconfigurable intelligent surface (RIS) having a plurality of reflective elements (RIS elements). In an example, a method includes determining relative location information regarding a transmitter and the RIS and a receiver and the RIS. Based on the relative location information, angle of arrival information is calculated for signals from the transmitter to the RIS elements, and angle of departure information is calculated for signals from the RIS elements to the receiver. Phase shift information for the RIS elements is calculated based on the angle of arrival and angle of departure information, and is used to select reflection coefficients for the RIS elements such that a transmitted signal is reflected from the RIS to the receiver as a coherent reflected beam. The reflection coefficients are stored as a codeword in a RIS codebook used to configure the RIS elements.

The invention belongs to the technical field of household appliances, and discloses a dishwasher projection method and device. The method comprises the steps that the projection equipment is controlled to project target projection, and the photosensitive receiver receives the reflected target projection, converts the reflected target projection into a corresponding current electric signal and transmits the electric signal to the controller; the controller determines a target light intensity electric signal of each single color under the current projection brightness corresponding to the target projection according to the current electric signal transmitted by the photosensitive receiver, and obtains a target reflection coefficient corresponding to the target light intensity electric signal; and determining mixed chromaticity coordinates and mixed brightness corresponding to the target projection according to the target reflection coefficients corresponding to the plurality of projection brightness, and controlling the projection equipment to project based on the mixed chromaticity coordinates and the mixed brightness. According to the invention, the projection can be automatically calibrated, and unclear projection of a user is avoided.

An ultrasonic method for simultaneously measuring coating and lubrication film thicknesses, in which a pseudo-reflection coefficient is constructed based on an overall echo signal from a four-layer structure and a reference signal from a coating-air interface; an amplitude spectrum of the pseudo-reflection coefficient is obtained; if there is an extremum point in the amplitude spectrum of the pseudo-reflection coefficient, a pseudo-reflection coefficient corresponding to an ultrasonic frequency at the extremum point is extracted to obtain a coating thickness, and a first thickness of a lubrication film is obtained based on the frequency; otherwise, a pseudo-reflection coefficient corresponding to a frequency at a maximum of an amplitude spectrum of a reference signal is extracted to obtain a second thickness of the lubrication film; and based on the first or second thickness, a thickness h of the lubrication film in the four-layer structure is measured.

A circuit for measuring the reflection coefficient and a method for testing and calibration are proposed. The measurement circuit consists of two cascaded orthogonal directional couplers, with the through-terminal and coupling terminals of the two couplers connected to the same reactive element. Measuring the voltage between the through-terminal and coupling terminals under short-circuit conditions allows for calibration of the reflection coefficient of the reactive element. Based on the measured voltages between the through-terminal and coupling terminals of the two orthogonal directional couplers, a system of two nonlinear equations can be constructed. Solving this system yields the real and imaginary parts of the reflection coefficient of the load under test.

The invention discloses an organic matter identification method based on seismic wave dispersion, and relates to the technical field of petroleum geophysical exploration, and the method comprises the steps: obtaining a target pre-stack seismic trace set and matched logging data, building an underground medium initial model based on the kerogen content and elastic response characteristics in the logging data, and obtaining an underground medium initial model; a to-be-inverted parameter matrix and a reflection coefficient weight matrix of an incident angle are calculated through a Shaw reflection coefficient calculation equation, frequency-division seismic wavelets are generated through the high sensitivity of organic matter to transverse wave dispersion, and a positive operator is constructed in combination with the wavelets and the reflection weight matrix. A shear wave velocity dispersion gradient which is highly sensitive to organic matters and weak in response to pore fluid is used as a main control inversion parameter, a combined recognition constraint term is constructed by combining a longitudinal wave velocity dispersion gradient and attenuation spectrum morphological characteristics, and a spatial optimal solution of a forward operator and a seismic trace set is calculated through a minimization objective function. And quantitatively associating the spatial optimal solution with the geophysical response characteristics of the organic matters to generate an organic matter spatial distribution diagram of the target reservoir.

The invention discloses an optical transmission reflection coefficient detection system and method, and the system comprises a signal amplification module and a control module, and the signal amplification module is used for amplifying a second electric signal generated based on the reflected light power of an optical transmission assembly to generate an amplified signal, the control module is used for obtaining the emergent light power of the light sending assembly and the received reflected light power based on a first electric signal generated according to the emergent light power of the light sending assembly and the amplification signal, and obtaining the light sending reflection coefficient based on the emergent light power and the reflected light power. According to the light transmission reflection coefficient detection system and the detection method, the emergent light and the reflected light of the light transmission assembly are simultaneously detected through the first photoelectric conversion device and the second photoelectric conversion device, and the signal amplification module is combined to amplify the second electric signal generated according to the reflected light; accurate identification of the reflected light power is realized, and the accuracy of the light transmission reflection coefficient is ensured.

The invention discloses a single fault point distance measurement method based on a reflection coefficient spectrum period, and relates to the technical field of fault detection, and the method comprises the specific steps: 1, constructing a model, and building an incidence relation; 2, determining the frequency range and bandwidth of frequency sweeping; 3, collecting data and constructing a smooth interpolation curve; 4, detecting feature points to obtain a phase coefficient value; 5, calculating a period and solving a fault distance; according to the method, the improved reflection coefficient spectrum model integrated with the cable basic parameters is constructed, the correlation between the period and the fault distance is established, interference of a traditional method is avoided, the near-area fault distance measurement problem is solved, and accuracy and adaptability are improved; and meanwhile, data is processed by adopting segmented cubic spline interpolation, fuzzy feature points are eliminated, redundancy check of three cycle calculation modes is designed, the anti-interference capability is enhanced, the fault distance is stably output in signal attenuation and noise interference scenes, and the reliability and consistency of a distance measurement result are guaranteed.

The application provides a terahertz ISAC system design method based on delay alignment modulation and active RIS, and the steps are as follows: firstly, an active RIS assisted terahertz communication and sensing integrated (ISAC) system is built, and the signal received by the user and the signal signal-to-noise ratio of the terahertz ISAC system are calculated; secondly, the non-coherent accumulation is used to calculate the illumination power at the static target, and the received thermal noise at the static target and the power consumed by the active RIS are calculated based on the active RIS; finally, the reflection coefficient of the active RIS and the transmission beam forming vector at the DFBS are jointly designed to maximize the illumination power of the target, and the semi-definite program relaxation technology is used for solving. The application optimizes the transmission beam forming vector of the DFBS and the reflection coefficient of the active RIS, improves the sensing performance and guarantees the communication quality; the terahertz ISAC system utilizes the unique advantages of RIS and DAM, and provides incomparable benefits in the aspects of sensing and communication performance.

The invention relates to a radio frequency resonance sensing type fingerstall for quantitative biochemical detection, comprising: a fingerstall assembly comprising a first fingerstall, a second fingerstall, and a connecting part for connecting the first fingerstall and the second fingerstall, the first fingerstall and the second fingerstall being respectively used for sleeving a thumb and an index finger; the quantitative ring cutting device is arranged on the surface of the finger prominence position of the first fingerstall; the radio frequency resonance sensor is arranged on the surface of the finger prominence position of the second fingerstall; the radio-frequency signal acquisition circuit module is arranged at the finger root of the second fingerstall, is electrically connected with the radio-frequency resonance sensor and is configured to be used for transmitting a sweep-frequency radio-frequency excitation signal to the radio-frequency resonance sensor and receiving a reflected signal of the sweep-frequency radio-frequency excitation signal; when the thumb sleeved with the first fingerstall and the index finger sleeved with the second fingerstall stretch into the two sides of the sheet-shaped part of the plant to be detected and are kneaded, a sample with the fixed size is cut from the sheet-shaped part of the plant to be detected through the quantitative ring cutting device, and the cut sample directly makes contact with the surface of the radio frequency resonance sensor; therefore, the resonant frequency of the radio frequency sensor is shifted and / or the reflection coefficient is changed, so that the reflection signal of the radio frequency resonant sensor received by the radio frequency signal acquisition circuit module is changed. Thus, the flexible wearable fingerstall provided by the invention integrates an unmarked, non-modified and direct contact type radio frequency resonance sensor and a quantitative ring cutting device for quantitative sampling, can perform quantitative sampling and real-time detection on solid samples such as plant leaves and the like, and realizes an integrated operation process of'detection once pinching '; and the standardization, portability and field applicability of detection are remarkably improved.

This invention discloses a method and apparatus for noise-resistant frequency compensation of seismic data, relating to the fields of compressed sensing and seismic exploration design. The method includes: performing spectral analysis on the original seismic data to determine the expected frequency broadening range; performing autocorrelation calculation on the original seismic data to obtain wavelet-like waveform data; using the wavelet-like waveform data as simulated wavelet data, inputting iterative solutions to the compressed sensing noise-resistant frequency extension basis function to obtain the full bandwidth reflection coefficient; concatenating the full bandwidth spectrum with the original seismic data spectrum to obtain the extended spectrum; and performing an inverse Fourier transform on the extended spectrum to obtain the noise-resistant frequency extension data. This invention is based on the compressed sensing framework, utilizes the Shearlet denoising basis function to constrain the frequency extension basis function, and constructs a noise-resistant frequency extension basis function based on compressed sensing, achieving good high- and low-frequency compensation effects for seismic data under low signal-to-noise ratio conditions.

The application provides a nondestructive testing method for the bonding strength of a coating of a semiconductor device shell, and belongs to the technical field of semiconductor device testing. The method solves the problem that the bonding strength of a coating and a substrate cannot be nondestructively evaluated in the prior art. The method comprises the following steps: arranging an acoustic wave coupling medium and an acoustic wave sensor on the surface of the coating, selecting at least three laser impact points, focusing a laser beam generated by a pulsed laser on the impact points, collecting a longitudinal wave signal after laser impact, reading a first echo signal peak voltage and a second echo signal peak voltage, calculating an acoustic pressure reflection coefficient R , performing laser impact on the same impact points for a second time at the same energy density, obtaining a reflection coefficient change amount R , calculating an average value R of the reflection coefficient change amounts R of the multiple impact points, and determining whether the bonding strength of the coating and the substrate meets a requirement according to the average value R avg When the average value R avg is greater than 0.05, it is determined that the bonding strength of the coating and the substrate does not meet the requirement, otherwise, the bonding strength of the coating and the substrate meets the requirement. The application can be used for the rapid and nondestructive evaluation of the bonding strength of a coating of a semiconductor device shell.

The light-weighted horn body is used for a ridge-added horn antenna, the horn body is a right quadrangular pyramid component with one big head and one small head, the horn body is welded by four side plates, the inner wall of the side plate is vertically connected with a ridge piece extending along the length direction of the side plate, the inner wall of the ridge piece is an arc surface, any ridge piece does not contact with the rest ridge pieces, and the plane where any ridge piece is located passes through the axial line of the horn body, the side plate and the ridge piece are made of non-metal material, a plurality of parallel and spaced holes are arranged on the ridge piece, the holes on all the ridge pieces are one-to-one corresponding, and a metal conductive layer is plated on the surface of the side plate, the surface of the ridge piece and the inner wall surface of the hole, the light-weighted horn body can realize light weight by the material of the side plate and the ridge piece and the cavity formed by the holes, can optimize the disturbance of the ridge piece to the field by the cavity formed by the holes, and can improve the capacitive loading of the ridge piece in the length direction of the ridge piece, so that the performance adjustment has more means, and the adjustment of the parameters such as the reflection coefficient and the isolation can be considered.

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 application discloses a kind of λ / 4 stepped impedance transformation method and system.Therein, the method includes: in the impedance mismatching of partial discharge ultrahigh frequency load impedance and the characteristic impedance of partial discharge ultrahigh frequency measurement system, access λ / 4 stepped impedance transformation two-port network, the load impedance is wave impedance;According to characteristic impedance Z 0, wave impedance Z L And the characteristic impedance of two-section λ / 4 transmission line Z 1, Z 2, determine partial voltage reflection coefficient;According to the partial voltage reflection coefficient, determine total voltage reflection coefficient;According to the total voltage reflection coefficient, broaden the working frequency band of λ / 4 stepped impedance transformer.Therefore, break through the limitation of direct matching, by the progressive stepped impedance matching mode of sensor element, realize partial discharge ultrahigh frequency signal sensor element and subsequent radio frequency processing circuit good matching, thereby reduce the partial discharge ultrahigh frequency signal attenuation caused by impedance mismatching.