35 results about "Q factor" patented technology

The invention discloses a joint inversion method for near-well characteristics of a fracturing crack based on high-frequency tube waves and water attack, and relates to the technical field of fracturing crack inversion. The method comprises the following steps: establishing a tube wave shaft crack model; carrying out segmentation, zero padding and Fourier transform on the pre-pressing pipe wave excitation signal, then substituting the pre-pressing pipe wave excitation signal into a pipe wave shaft crack model for inversion to obtain an optimal pipe wave quality factor and an optimal pipe wave velocity, and correcting the model; the depth of a fracturing main liquid inlet point is calculated based on a pump stopping water attack curve; and performing segmentation, zero padding and Fourier transform on the pressed pipe wave excitation signal, and then substituting the pressed pipe wave excitation signal into the corrected pipe wave wellbore crack model for inversion. According to the method, the echo signal obtained through calculation is closer to the real situation, the depth of the main liquid inlet point is determined in advance, accurate and rapid inversion of the tube wave is facilitated, and meanwhile the inversion time can be greatly saved.

The invention discloses a micro-mechanical gyroscope zero offset online temperature compensation method based on Q value active control, and belongs to the technical field of micro-mechanical gyroscope zero offset temperature compensation. According to the method, on the basis that asymmetry of quality factors of a driving mode and a detection mode is a main cause of an in-phase zero offset error, improvement of in-phase zero offset is achieved in a mode of controlling the quality factors of the modes through parametric excitation. According to the method, online identification of the intrinsic quality factor and the equivalent quality factor of the detection mode is realized by using a signal injection method, and online compensation of the equivalent quality factor is realized through parametric excitation. The method solves the problem of zero offset error drift caused by mismatching of quality factors of a driving mode and a detection mode in a temperature change environment, and a universal scheme is provided for the zero offset temperature stability of the high-performance micromechanical gyroscope.

The invention relates to a concave quasi-continuous domain bound state terahertz metamaterial sensor, the sensor is provided with a plurality of periodic array units in horizontal and vertical directions, and each array unit is composed of a metal metasurface, a dielectric layer and a metal back plate from top to bottom, and the depth of the metal back plate is larger than that of an incident wave skin; wherein the metal metasurface is composed of two parts, one part is a cylindrical structure with a double-fan-shaped opening, the other part is a closed resonant ring, the left opening angle of the double-fan-shaped opening is not equal to the right opening angle of the double-fan-shaped opening, the cylindrical structure with the double-fan-shaped opening is located in the closed resonant ring, and a part of the cylindrical structure is embedded in the dielectric layer. The constructed sensor generates two harmonic peaks under excitation of vertical incidence terahertz waves, the two harmonic peaks are respectively located at 3.44 THz and 3.51 THz, and the highest quality factor Q value reaches 3096. According to the invention, a disc structure with unequal opening angles on the left and right sides is innovatively constructed, quasi-BIC resonance is realized, and the quasi-BIC resonator has the advantages of high refractive index sensitivity, good linearity, simple structure, easy processing and the like.

The invention belongs to the technical field of partial discharge detection, particularly relates to a partial discharge signal denoising method based on SVDTQWT, and aims to effectively remove periodic narrow-band interference and white noise in partial discharge signals. Comprising the following steps: performing Fourier transform on a noisy partial discharge signal to obtain a frequency spectrum, determining the number of periodic narrowband interferences through singular value decomposition, constructing a Hankel matrix to eliminate the periodic narrowband interferences, and obtaining a preliminary de-noised signal; and decomposing the preliminarily denoised signal by adopting adjustable quality factor wavelet transform to obtain a plurality of sub-bands. And dividing the plurality of sub-bands into high-frequency sub-bands and low-frequency sub-bands through sample entropy. Wherein the sample entropy indicates measurement of the complexity of the time series. And de-noising the high-frequency sub-band by using a group sparse total variation de-noising algorithm, de-noising the low-frequency sub-band by using an improved wavelet threshold de-noising algorithm, and reconstructing by using adjustable quality factor wavelet transform to obtain a pure partial discharge signal.

The invention belongs to the field of continuum bound states and metasurfaces in nanometer photonics, and discloses a dielectric metasurface for realizing stable high-Q-value BIC through eigenfield disturbance. The dielectric metasurface comprises a dielectric substrate, a plurality of dielectric resonance units and a dielectric wrapping layer, the plurality of dielectric resonance units are periodically arranged on the dielectric substrate, and all the dielectric resonance units are surrounded by the dielectric wrapping layer; the structures of the dielectric resonance units are the same, the whole dielectric resonance units are in a regular quadrangular prism shape, and a vertical round hole is formed in the middle of each dielectric resonance unit. The corresponding positions of the two sides of each dielectric resonance unit in the y-axis direction are each provided with a columnar notch, one notch is a semicircular notch, and the other notch is a semi-elliptical notch. The dielectric metasurface can realize continuum bound state BIC of a high-quality Q factor; the morphology changes on the two sides of the notch are equal, so that the overall structure has a constant effective refractive index, and resonance with stable wavelength is generated; and a way is laid for the application of a low-threshold laser, an ultra-sensitive optical sensor and nonlinear optics.

A method of determining beta radiation intensity based on calculated resonance frequency and calculated quality factor can include providing an electrical sensor comprising at least one prong, irradiating the first composite material of the one of the plurality of planar surfaces and the material of the second section with beta radiation from a beta radiation source; measuring at least one impedance value from the electrical sensor with an impedance analyzer; calculating at least one resonance frequency value based on the measured at least one impedance value; calculating at least one quality factor value based on the calculated at least one resonance frequency value; and determining the beta radiation intensity based on the calculated at least one resonance frequency value and the calculated at least one quality factor value.

A resonator, a preparation method thereof, a filter and an electronic device, the resonator comprising a substrate (3), a Bragg reflection layer (2) and a piezoelectric layer (1) which are sequentially stacked; the surface of the piezoelectric layer (1) facing the Bragg reflection layer (2) is provided with a first electrode (11), and the surface of the piezoelectric layer (1) facing away from the Bragg reflection layer (2) is provided with a second electrode (12); the surface of the second electrode (12) facing away from the piezoelectric layer (1) is provided with a boundary ring (13), the resonator has a first resonant region (A1) and a second resonant region (A2) corresponding to the boundary ring (13); along the stacking direction, the Bragg reflection layer (2) comprises a low acoustic resistance structure (21) and a first high acoustic resistance structure (22) embedded in the low acoustic resistance structure (21); the first high acoustic resistance structure (22) is provided with a discontinuous structure (D, F) corresponding to the second resonant region (A2). By reasonably designing the first high acoustic resistance structure (22), the influence of the boundary mode harmonics generated by the boundary ring (13) can be weakened, and the high quality factor of the resonator is maintained; in addition, the manufacturing process of the first high acoustic resistance structure (22) is highly feasible.

The invention relates to the technical field of micro-nano photonics and nonlinear optics, in particular to a slotted metasurface capable of enhancing third-order nonlinearity, which comprises a silicon dimer metasurface structure unit, and a quartz substrate is arranged at the bottom of the silicon dimer metasurface structure unit; each silicon dimer metasurface structure unit is composed of two symmetrically-arranged nano-plates, the thickness of each nano-plate is 90 nm, the radius of each nano-plate is 180 nm, the refractive index of each nano-plate is 3.48, each nano-plate is provided with a narrow slit with the width of 20 nm and the length of 60 nm, the distance between the two nano-plates is 10 nm, ED / TD destructive interference is achieved through slotted dimer design, and the traditional structure Q factor limitation (Qgt; the method has the advantages that the THG efficiency is improved to 4.6 * 10 <-4 > (the highest level of similar silicon structures) and the parameter regulation and control flexibility (polarization and geometric dimensions), and a new normal form is provided for an on-chip nonlinear optical system.

The invention belongs to the technical field of material characteristic analysis, and particularly relates to a prefabricated part in-mold compactness monitoring method and system. The method comprises the following steps: applying impact to a measuring point outside a mold, collecting elastic wave time domain response signals of adjacent sensors, and constructing self-correlation attenuation-Gaussian composite window cut-off signals; fourier transform is carried out on the truncated signal, a dimension-entropy weight composite spectrum is generated after frequency sub-bands are divided, and an inherent frequency peak is positioned; calculating a quality factor of the inherent frequency peak, extracting harmonic frequency peak energy to form a multi-scale spectrum peak energy distribution vector, and calculating Shannon entropy; matching a temperature-quality factor coupling model from a preset model library by using Shannon entropy, and correcting a quality factor in combination with an in-mold environment temperature; and inputting the inherent frequency peak, the temperature compensation quality factor and the energy distribution vector into a nonlinear mapping model, and outputting the in-mold compactness of the prefabricated part. According to the method, high-precision and reliable quantitative evaluation of the in-mold compactness of the prefabricated part is realized.

The metasurface resonator comprises a plurality of unit structures arranged periodically, each unit structure comprises a substrate layer and an L-shaped metal column, the L-shaped metal column is arranged at the center of the upper surface of the substrate layer, and the L-shaped metal column is arranged at the center of the upper surface of the substrate layer. The L-shaped metal column is composed of two cuboid metal columns which are perpendicular to each other, and the heights of the two cuboid metal columns which are perpendicular to each other are adjusted through a height scaling factor. By adjusting the height scaling factor of the metasurface resonator, the dissipation characteristic of the resonance mode supported by the metasurface resonator can be controlled, when the height scaling factor is reduced, the local state of the high-loss and low-quality factor supported in the metasurface resonator is evolved into the non-local state of the low-loss and high-quality factor, and the local state of the high-loss and low-quality factor is changed into the non-local state of the low-loss and high-quality factor. And non-local plasmon resonance with smaller radiation loss, narrower line width and higher quality factor is excited. By using the non-local plasmon resonance of the high-quality factor, the GH displacement can be greatly enhanced.

The invention discloses a high-Q-factor MEMS (Micro Electro Mechanical System) beam resonator with a periodic ripple boundary, and belongs to the field of micro electro mechanical system resonator design. According to the structure, periodic corrugation modulation is introduced into the side wall of a traditional straight beam, a plurality of periodic corrugation units are symmetrically arranged on the boundary of the side wall of a beam body, a corrugation boundary contour curve is defined by a parameterization function, the modulation amplitude and period are adjustable, the beam width is continuously and periodically changed in the length direction, and therefore thermoelastic damping and anchor point loss are reduced at the same time. The corrugated boundaries are integrally and symmetrically arranged and can be directly processed and formed by an SOI (Silicon On Insulator) process, the structure manufacturability is high, and additional assembly is not needed. Under the driving of electrostatic force, the resonator forms more uniform strain distribution and a limited heat flow channel in fundamental mode vibration, so that the energy leakage is obviously weakened, and the resonance quality factor is further improved. The structure is suitable for high-Q-factor demand scenes such as high-sensitivity MEMS sensors, low-noise oscillators and microfilters.

Provided in the present invention is a method for accurately solving for wideband Q-factor and C-value curves of a capacitor, the method comprising frequency segmentation, low-frequency band and high-frequency band processing, transition region setting, curve splicing and smoothing processing. The specific steps comprise: dividing a frequency range into a low-frequency band of 0-5 GHz and a high-frequency band of above 5 GHz; in the low-frequency band, using an equivalent circuit model method to calculate a Q factor and a C value within the frequency range of 0-5 GHz; in the high-frequency band, using an S parameter fitting method to calculate a Q factor and a C value; setting a transition region at 4-6 GHz; and splicing curves of the low-frequency band and the high-frequency band and then performing smoothing processing on the curves in the transition region, so as to obtain final Q-factor and C-value curves. The present invention can accurately solve for the wideband Q-factor and C-value curves of the capacitor, thereby improving the accuracy and reliability of capacitor performance analysis.

The invention belongs to the technical field of seismic exploration, and particularly discloses a low-signal-to-noise-ratio seismic data Q factor extraction method, electronic equipment and a storage medium. The method comprises the following steps: firstly, preparing data, screening and classifying VSP seismic data into first-class to third-class quality data, preprocessing, calculating longitudinal wave layer velocities of a first-class quality factor and a second-class quality factor and a sound wave velocity of a third-class quality factor, then extracting a Q factor of the first-class quality factor, and calculating a Q factor of the second-class quality factor; and performing model training on the obtained Q factor to obtain a fitting formula, substituting the longitudinal wave layer velocity of the second type of quality factor into the fitting formula to obtain a fitted Q factor, and substituting the sound wave velocity of the third type of quality factor subjected to smoothing processing into the fitting formula to obtain a Q factor of the third type of quality factor. The method is used for extracting the Q factor, and the accuracy of the extracted Q factor can be improved.

The invention discloses a method for calculating the mode purity of a high-quality factor TM010 over-mode cylindrical resonant cavity, and belongs to the field of electromagnetic field propagation. According to the method, structural details of a coupling hole, an end cover step and a fit clearance are covered in modeling; all possible competition modes are covered through functional region decomposition and electromagnetic field mode decomposition in combination with a mode excitation rule of an over-mode cavity; introducing power normalization processing, and establishing a unified amplitude comparison reference; based on the synergistic effect of scattering matrix cascading and electromagnetic field mode decomposition, the transmission, reflection and coupling processes of multiple modes in the cavity are completely described; according to the invention, the problems that only the mode purity of the port plane and the electromagnetic field distribution in the volume can be obtained and the mode purity of a specific mode in the volume of the resonant cavity cannot be accurately calculated in the prior art are solved; the method is applied to the core technologies of microwave communication, satellite load, particle acceleration, precision measurement and the like depending on high-quality factor resonant cavities to accurately calculate the TM010 mode purity in the volume of the resonant cavity.

The present application provides a kind of cantilever resonance frequency and quality factor measurement method and device, compared with the measurement method based on the PLL technology of existing phase-locked loop, can more comprehensively grasp sample magnetic property, and when responding to cantilever quality factor mutation, there is good measurement stability.The measurement method of the present application includes: cantilever driving step, wherein the driving signal of first frequency is used to drive the cantilever to vibrate, and then stop the driving signal;Free decay signal acquisition step, wherein in response to the stop of the driving signal, the free decay vibration signal of the free end of the cantilever is acquired;And data processing step, wherein the acquired free decay vibration signal is processed to obtain the resonance frequency and quality factor of the cantilever.

The present invention relates to a concave quasi-continuous domain bound state terahertz metamaterial sensor, which has a number of periodic array units in the horizontal and vertical directions. The array units are composed of a metal metasurface, a dielectric layer, and a metal backplane with a depth greater than the skin depth of the incident wave from top to bottom. The metal metasurface consists of two parts, one of which is a cylindrical structure with a double fan-shaped opening, and the other is a closed resonant ring. The opening angle of the left side of the double fan-shaped opening is unequal to the opening angle of the right side. The cylindrical structure with the double fan-shaped opening is located within the closed resonant ring, and part of the volume of the cylindrical structure is embedded in the dielectric layer. The constructed sensor generates two resonance peaks under the excitation of a vertically incident terahertz wave, respectively at 3.44THz and 3.51THz, with a maximum quality factor Q value of 3096. The present invention innovatively constructs a disk structure with unequal opening angles on the left and right sides to achieve quasi-BIC resonance, with the advantages of high refractive index sensitivity, good linearity, simple structure and easy processing.

This application discloses a vibration protection method for equipment. To achieve vibration protection of the target equipment, a first signal is acquired, the real-time rotational speed of the target equipment is determined using the first signal, and a filtering bandwidth is determined based on the real-time rotational speed and the quality factor of a filter. The second signal is then filtered using this filtering bandwidth to obtain a filtered signal, i.e., a third signal. This filtering method ensures that the fundamental frequency component is retained as much as possible while removing the harmonic components. Furthermore, the third signal is resampled to obtain a fourth signal, the spectral resolution of which is higher than that of the third signal. This resampling method ensures that the fundamental frequency energy leakage is minimized, thereby maximizing the retention of the fundamental frequency vibration value of the fourth signal after frequency domain processing. This reduces the risk of false alarms and malfunctions when vibration protection is performed based on this fundamental frequency vibration value.

The invention discloses an interdigital transducer and an elastic wave resonator, and belongs to the technical field of surface acoustic waves. The interdigital transducer comprises an interdigital transduction electrode structure, the interdigital transduction electrode structure comprises a first interdigital electrode and a second interdigital electrode which are oppositely arranged in the first direction and form an aperture area, the finger edge of the first interdigital electrode forms a first curve, and the finger edge of the second interdigital electrode forms a second curve; the mass loads are formed on the interdigital transduction electrode structure and located in the aperture area, and the mass loads are arranged to form at least one third curve and at least one fourth curve; wherein the first curve, the second curve, the third curve and the fourth curve all meet a specific apodization function. According to the interdigital transduction electrode, apodization is carried out on the edge of a finger strip in the interdigital transduction electrode structure, an apodization mass load is arranged in an aperture area, and a specific apodization curve is adopted, so that propagation of a transverse mode is blocked, the transverse mode is inhibited, and meanwhile, quality factors are not reduced.

The present application belongs to the technical field of seismic exploration, and specifically discloses a low signal-to-noise ratio seismic data Q factor extraction method, an electronic device and a storage medium. The method of the present application first performs data preparation, classifies VSP seismic data into first-class quality data-third-class quality data, and performs preprocessing, calculates the first-class quality factor, the second-class quality factor, and the third-class quality factor, then extracts the Q factor of the first-class quality factor, and then performs model training on the obtained Q factor to obtain a fitting formula, substitutes the longitudinal wave layer velocity of the second-class quality factor into the fitting formula to obtain a fitted Q factor, and substitutes the smoothed acoustic wave velocity of the third-class quality factor into the fitting formula to obtain the Q factor of the third-class quality factor. The present application is used for extracting the Q factor, and can improve the accuracy of the extracted Q factor.

The invention discloses an ultra-high quality factor quasi-continuous domain bound state realization method, and relates to the field of micro-nano photonics resonators, and the method comprises the steps: designing a symmetric medium nano column, and exciting an internal Mie mode and a Fabry-Perot mode through adjusting the geometric parameters of the symmetric medium nano column; coupling of the two modes is accurately regulated and controlled, so that far-field radiation destructive interference is achieved, and a high-Q-value quasi-continuous domain bound state is formed under the condition of no symmetry breaking; the nano-columns are arranged into a periodic array, lattice constants are optimized, and the quality factor is improved to an ultrahigh level by using resonance coupling and collective interference effect between adjacent nano-columns. Symmetrical breaking is not needed, and higher structural robustness and preparation tolerance are achieved.

The present invention relates to a rolling bearing fault diagnosis method based on adjustable quality factor wavelet threshold denoising, which includes: 1) Collecting the state signals during the operation of the rolling bearing and calculating the corresponding fault characteristic frequencies when damage occurs to each component of the test bearing; 2) Constructing a continuous threshold function including a transition band; 3) Adaptively constructing adjustable quality factor wavelet parameters matching the fault characteristic signals based on the vibration test signals; 4) Obtaining the signal after optimal adjustable quality factor wavelet threshold denoising; 5) Diagnosing the fault type of the rolling bearing based on the envelope spectrum of the denoised signal. The present invention combines the advantages of the adjustable quality factor wavelet with flexible oscillation attributes of the basis function and the powerful denoising ability of threshold denoising, and can analyze and diagnose the vibration signals of rolling bearings in a strong noise environment.

The invention discloses a terahertz pure silicon equiphase low-loss waveguide based on a bound state in a continuous spectrum, and belongs to the technical field of terahertz on-chip communication. The waveguide comprises a conical gradual change input structure, a first straight waveguide, an equiphase waveguide, a second straight waveguide and a conical gradual change output structure which are sequentially connected along a transmission direction, the equiphase waveguide is of a one-dimensional photonic crystal structure formed by arranging a plurality of periodic unit structures, each unit is a cuboid made of a high-resistance silicon material, and symmetrical elliptic cylindrical grooves are formed in the upper surface and the lower surface of each unit. Energy band degeneracy of monopole and dipole modes is realized through points in a Brillouin region, a Dirac cone is formed, a near-zero effective refractive index is obtained at a central working frequency, and equiphase transmission is realized; and meanwhile, a bound state mechanism in a continuous spectrum is utilized to greatly improve quality factors and suppress radiation loss. The waveguide supports flexible adjustment of the working frequency through geometric dimension equal-proportion scaling, covers the frequency band of 0.1-10 THz, and can be designed to be of a bent structure. According to the invention, an all-silicon process is adopted, the structure is compact, the loss is low, and the device is suitable for high-fidelity signal transmission and processing in a terahertz integrated system.

The present invention discloses a Lissajous frequency-modulated MEMS gyroscope control system and parameter excitation method based on a phase-locked loop (PLL), belonging to the field of micromechanical gyroscopes. Based on the phase-frequency characteristics of the MEMS gyroscope's modal vibration displacement, the present invention utilizes a PLL to simultaneously maintain modal resonance and read out the resonant frequency. This eliminates the need for a dedicated frequency readout circuit, thereby simplifying circuit design. The read resonant frequency can be used to obtain an external input angular velocity through subsequent signal processing. By applying a disturbance signal to the modal stiffness, parametric excitation of the modal is achieved, changing the phase-frequency characteristics of the modal vibration displacement, effectively improving the modal quality factor, reducing the frequency noise of the PLL output, and improving the detection accuracy of the final angular velocity output.

The utility model relates to a terahertz metasurface frequency multiplier based on a continuous domain bound state, which comprises a plurality of structure units arranged periodically, and the composition of each structure unit is the same. The structural unit comprises a substrate and a silicon structure located on the substrate; a hollow cylinder is arranged in the silicon structure, and after disturbance is introduced, the hollow cylinder in the silicon structure shifts in the horizontal direction, so that the symmetry of the unit structure is broken. According to the utility model, the symmetrical protection type quasi-BIC resonance is excited by introducing the disturbance on the symmetry of the unit structure, and the harmonic enhancement is realized by using the nonlinear effect caused by the local field enhancement generated by the quasi-BIC resonance. According to the utility model, the problems of low resonance quality factor and complex structure in the existing metasurface resonator and terahertz frequency multiplier are solved.

The present application relates to the technical field of resonator, and discloses a resonator with super-high quality factor and insensitive to incident angle, which comprises a plurality of units arranged periodically, each unit is identical in structure and is composed of a dielectric column composed of dielectric AlGaAs.The present application solves the problems of high loss and complex structure in the high quality factor metal metamaterial resonator in the prior art, through the design of dispersion relation, the working wavelength is shifted extremely small under different incident angles, and the extremely high quality factor of the resonant peak can realize the great enhancement of nonlinear response.

System, methods, and other embodiments described herein relate to a high-Q resonant state embedded system in a continuous body. In one embodiment, a system includes a longitudinally extending body that is subject to a flexural wave. The longitudinally extending body is attached to a fixed structure at a first end. The system also includes a mechanical resonator coupled to a surface of the longitudinally extending body along a length dimension of the longitudinally extending body. The mechanical resonator is located at a distance away from a second end of the longitudinally extending body to exhibit an infinite Q factor based on physical properties of the mechanical resonator.

The present application provides a parameter design method for an array resonant circuit, wherein the array resonant circuit includes m resonant units, and the parameter design method includes: simulating n resonant units among the m resonant units according to the expression of the resonant frequency with respect to the inductance value L of the resonant inductor, the first microbridge number of the resonant capacitor, the second microbridge number of the coupling capacitor, and multiple constant parameters K, and determining the value of the combination of L and K; n is greater than or equal to 3 and less than m; and determining the value of L and the multiple constant parameters K according to the first expression of the quality factor with respect to the inductance value L, the first microbridge number, the second microbridge number, and multiple constant parameters K, in combination with the value of the combination of L and K. In this way, the relationship between the resonant frequency and the quality factor with respect to the first microbridge number and the second microbridge number can be determined by a small amount of simulation combined with formula calculation.

The invention belongs to the technical field of electronic information functional ceramic materials, and particularly relates to a resonant frequency temperature coefficient regulating agent, a dielectric ceramic material and a preparation method and application of the dielectric ceramic material. The resonance temperature coefficient regulating agent is characterized in that the chemical formula of the resonance temperature coefficient regulating agent is CaY (2-x) SmxGe3O10, and x is more than or equal to 0 and less than or equal to 2. The regulating and controlling range of the temperature coefficient of resonance frequency of the regulating and controlling agent is-5 to-250 ppm / DEG C, the quality factor Q * f is greater than or equal to 40000 GHz, and the dielectric constant is less than or equal to 10.5. The microwave dielectric ceramic prepared by the method can well meet the increasingly stringent requirements of the current technical field of mobile communication on the temperature stability of materials, has a relatively high quality factor and a relatively low dielectric constant, has a large-range adjustable temperature coefficient of resonance frequency, can be used as a regulating agent of microwave dielectric ceramic with a positive temperature coefficient of resonance frequency, and has a wide application prospect. Therefore, the high-frequency, integrated and diversified application requirements of the device are met.

The embodiment of the present invention discloses a quality factor determination method, device, electronic device and storage medium. The method includes: determining the logarithm expression of the ratio of the received wavelet amplitude spectrum to the source wavelet amplitude spectrum based on the attenuation relationship between the received wavelet amplitude spectrum and the source wavelet amplitude spectrum characterized by the quality factor, as the logarithmic amplitude spectrum ratio; determining the expression of the area between the logarithmic amplitude spectrum ratio corresponding to the preset frequency band range and the frequency coordinate axis as the spectrum ratio area; wherein the frequency coordinate axis is the coordinate axis representing the frequency; determining the quality factor based on the actual amplitude of the received wavelet, the actual amplitude of the source wavelet and the spectrum ratio area, so as to evaluate the geological target based on the quality factor. This technical solution reduces the influence of noise in the logarithmic amplitude spectrum ratio waveform on the subsequent calculation process by calculating the spectrum ratio area, so that the quality factor determined based on the spectrum ratio area achieves the effect of high accuracy and good stability.

The application relates to a method and device for determining the outgassing characteristics of internal materials of wafer-level vacuum packaged devices. The method comprises the following steps: obtaining a first quality factor and a first resonant frequency of a test sample at a standard temperature; adjusting the temperature in a temperature test chamber, and obtaining a second quality factor and a second resonant frequency of the test sample at each test temperature under the condition that the test sample is placed in the temperature test chamber; determining the frequency variation amplitude of the test sample at each test temperature according to the first resonant frequency and the second resonant frequencies; determining the quality factor variation amplitude of the test sample at each test temperature according to the first quality factor and the second quality factors; and determining the outgassing characteristics of the internal materials of the test sample according to the frequency variation amplitude and the quality factor variation amplitude of the test sample at each test temperature. The method can accurately obtain the outgassing characteristics of the internal materials of wafer-level vacuum packaged devices.