74 results about "Lamé parameters" patented technology

The present invention discloses a system and method for free-space method dielectric constant measurement through addition of a polarization grid, belonging to the electromagnetic field and microwave technology field. On the basis of the current free-space method measurement system, a polarization grid mesh is added next to one side of a sample to be measured, a changing curve of reflection parameters and transmission parameters of the network with the angle of the polarization grid mesh is measured to distinguish the electromagnetic wave penetrating into the electromagnetic wave of the grid mesh from the invariable electromagnetic waves of other paths; and the changing signals carry the dielectric information of the sample to be measured, and the coefficients such as the amplitude in the changing curve are employed to perform evolution of the dielectric constant of the sample to be measured. In a stable environment, the changing of the network parameters with the polarization grid angle is not sensitive to the electromagnetic environment, and therefore the influences of the electromagnetic wave diffraction and diffraction in the experiment environment is effectively reduced. Besides, focusing lens antennas employ lossy material polylactic acid (PLA) to effectively reduce the multiple reflection of electromagnetic wave between the antennas to allow an experiment result to be more accurate.

The invention discloses a method for increasing a seismic imaging resolution ratio and is applied to reflection seismic data processing in seismic exploration . The method includes that by performing frequency-dependent amplitude recovery and frequency dispersion correction on migration stack data volume, the resolution ratio of imaging is increased integrally, and the imaging resolution ratios of middle and deep structures are enabled to be close to the imaging resolution ratio of a shallow structure; amplitude recovery and frequency dispersion correction are performed based on a viscoelastic theory, but a nonuniform Q value field does not need to be provided in advance; viscous absorption of seismic waves is described by introducing an equivalence Q value, and the nonuniform equivalent Q value field needed for calculation is acquired by establishing a single numerical indicator and by utilizing parameter scanning. Compared with methods like unsteady-state deconvolution, the method has the advantages that high-frequency information is restored while frequency dispersion correction is completed; a stable control algorithm is introduced, so that stability of calculation is guaranteed. By the method, breaking of the middle and deep structures and stratum deposition forms can be indicated better; and the method has important application value for oil-gas and mineral resource exploration.

Parametric curve fitting using maximum curvature techniques are described. In one or more implementations, a parametric curve is fit to a segment of a plurality of data points that includes a first data point disposed between second and third data points by setting a point of maximum curvature for the segment of the curve at the first data point. A result of the fitting is output by the computing device.

The invention provides a method for determining an Avrami mathematical model coefficient of a metal dynamic recrystallization volume fraction, and the method comprises the following steps: 1, obtaining a stress-strain curve of a material, carrying out water quenching treatment on a sample after the sample is deformed, observing a metallographic structure in the sample, and measuring the recrystallization volume fraction; 2, determining critical strain epsilon c of dynamic recrystallization; 3, determining a return curve; 4, calculating a curve of the volume fraction of the dynamic recrystallization along with the strain; and 5, solving coefficients m and epsilon * of the Avrami mathematical model according to the curve obtained in the step 4. According to the method, only the recrystallization volume fraction in the sample after deformation is measured, the recrystallization volume fraction of the sample in the deformation process is not needed, an equation is directly used for obtaining the curve of the recrystallization volume fraction changing along with strain, and steady-state stress epsilon ss does not need to participate in calculation; compared with the existing method, the method provided by the invention has the advantages of less parameters required in the calculation process, low workload and less sample consumption, and is suitable for popularization.

A method and apparatus for designing a gathering and transporting pipeline network include receiving design parameters, wherein that design parameters include topographic parameters, economic parameters and technical parameters; Generating a two-layer non-uniform mesh according to the design parameters, wherein the two-layer non-uniform mesh can characterize and determine the topology of a gathering pipeline network and the path between nodes; Judging whether the design result of the gathering and transporting pipeline network can be realized or not according to the preset rule and the two-layer uneven mesh; establishing A MILP model by taking that design parameter as a constraint condition and taking the minimum total construction cost as an objective function; solving The MILP model according to the two-layer non-uniform mesh to obtain the design result of the gathering and transporting pipeline network. The above method and device take into account the hydraulic calculation and economic flow rate, and can reflect the actual situation of the actual gathering and transporting system. Through the topographic parameters, economic parameters and technical parameters, the optimal gathering and transporting pipeline network design scheme can be obtained, which can guide the engineering construction of the oil and gas field and reduce the cost and increase the efficiency.

The present disclosure describes tools and associated computational analysis methodologies employed therein for improved minimum weight design of thin wall profile members (TPMs). The tools draw on inter-dependent parameters relating to TPM cross-section dimensions ratio values and established constructive restrictions to calculate, using appropriate algorithmic computational analysis, the optimum cross-section dimensions values of a given TPM. A design selection saves as a blueprint for the next stage, which is the actual fabrication or manufacturing of the component. For a given set of constructive restrictions, the final product is based on optimum configurations selected from a fixed set of TPMs with varied cross-sectional shapes.

This invention relates to methods and apparatus for measuring physical properties using microwave cavity sensors. In operation, a number of microwave cavity sensors are interrogated by a remote wireless unit in order to determine the current resonant frequency for the sensor. The current values for various parameters measured by the sensors, such as temperature, stress/stain, or the like, are determined by comparing the current resonant frequency to a first resonant frequency of the sensor, and thus, detect any change in the value of the selected parameter. In particular, the present invention is directed toward extending the range over which such measurements may be performed, using these types of sensors.

The invention discloses a visible light communication signal constellation design method, device and system. The method comprises the following steps: establishing a communication model and a signal space matrix of a visible light communication signal based on a Lambertian radiation model, and determining total light sending power of a signal constellation; sending a training sequence estimation channel matrix based on the communication model, and carrying out singular value decomposition on the channel matrix to obtain channel characteristic parameter matrixes ^ and V, wherein the influence of the channel characteristic parameter matrix V is represented by rotating a signal constellation point for an angle to further obtain channel characteristic parameters lambda 1, lambda 2 and (the formula is as shown in the specification), obtaining an Euclidean distance to be optimized between any two constellation points of a receiving end based on the signal constellation space matrix after angle rotation in combination with the channel characteristic parameter matrix ^, processing the Euclidean distance to be optimized under different value ranges of the channel characteristic parameters lambda 1, lambda 2 and (the formula is as shown in the specification) in combination with a non negative constraint condition to obtain corresponding optimized signal constellation distribution under different conditions, so as to realize the optimal communication performance of the visible light communication system.

Method for processing acoustic waveforms comprises acquiring acoustic waveforms in a borehole traversing a subterranean formation and transforming at least a portion of the acoustic waveforms to produce frequency domain signals. Then model dispersion curves, modes spectrum or waveforms are generated based on an anisotropic borehole-formation model having a set of anisotropic and geometrical borehole-formation parameters and by specifying governing equations and computational mesh based functional basis. The frequency-domain signals are back-propagating using the model dispersion curves to correct dispersiveness of the signals and coherence of the back-propagated signals is calculated. Alternatively the difference between the measured and the model dispersion curves is determined. Model parameters are iteratively adjusted until the coherence reaches a maximum or exceeds a selected value, or alternatively until the difference between the measured and the model dispersion curves becomes minimal or is reduced to below a selected value. Then at least a portion of the set of anisotropic and geometrical borehole-formation parameters is obtained.

The invention discloses a circuit life prediction method based on an accelerated degradation path. The method comprises the following steps: providing a plurality of components to be tested, which are of the same kind, carrying out accelerated degradation experiment on the plurality of components to be tested, and testing and recording performance degradation parameters of the plurality of components to be tested; determining sensitive parameters according to the performance degradation parameters of the plurality of components to be tested, and carrying out stationary processing on sample sequences of the performance degradation parameters of the plurality of components to be tested; obtaining ARIMA model parameters, establishing an ARIMA model according to the performance degradation parameters of the plurality of components to be tested, and updating the ARIMA model into a fitting model of a sensitive parameter path; comparing the fitting model with the sample sequences and judging whether the fitting model is effective, and evaluating fitting precision of the effective fitting model; and predicating the trend of the sensitive parameter path according to the fitting precision, the trend of the sensitive parameter path being predicated result of the circuit life.

Systems, methods, and apparatuses are provided for tuning a mass spectrometer. An optimization process can be performed to determine optimal parameters for various physical parameters of elements of the mass spectrometer. A cost function (metric) can be defined for optimizing a measured signal output from the spectrometer. The metric can include an intensity term and a rectangularity term. The rectangularity term can provide a quantification of an extent that a measured signal corresponding to a first mass-to-charge ratio approximates a rectangle. The parameter values can be adjusted to find an optimal cost value of the cost function. Techniques may particularly useful when a quadrupole is operated in a broad-stability mode.

A method for encoding and decoding, a scalar integer into at least one parameter representative of a pivot point comprised in a set of pivot points representative of a piece-wise linear function, said scalar integer being used when modifying pixel values of a picture, and corresponding apparatus, are disclosed. Said encoding method comprises:—a step E1 of selecting a subset of pivot points from the set of pivot points, according to a criterion, said subset comprising a number M of pivot points less than the number N of pivot points of said set of pivot points, —at least one step of coding E2 one bit of a binary representation of said scalar integer in a least significant bit of a component of a pivot point comprised into said subset.

The invention discloses a voice-based mouth shape and/or expression simulation method and device. The method comprises the steps that audio signals are acquired; the audio signals are converted into the spectrum data corresponding to the audio signals; the frequency distribution data are determined according to the spectrum data; the mouth shape simulation parameter and/or the expression simulation parameter are/is determined according to the frequency distribution data; and the corresponding mouth shape is simulated according to the mouth shape simulation parameter and/or the corresponding expression is simulated according to the expression simulation parameter. The technical problems of high workload of mouth shape or expression simulation in the virtual reality application in the related technology can be solved.

A collaborative filtering method based on domain correlation self-adaption comprises the following steps that 1,the difference of an auxiliary domain and a target domain serves as a regularization term and is introduced into a traditional model to obtain a new model (shown in the description), wherein T is a rating matrix having a partially deleted item in the target domain, Z and T have the same rating item; the equation shown in the description represents an index set representing the target domain, wherein the equation is shown in the description; | | . | | F represents a Frobenius norm, wherein the equation is shown in the description; | | . | | * represents a nuclear norm,| | Z | | *represents the sum of all singular values of a matrix Z; gamma is a regularization parameter, eta < (0, 1) represents the similarity of the auxiliary domain and the target domain; 2,a regular optimization solution Z* = Z of the new model is calculated by using a fixed-point iteration algorithm. The collaborative filtering method can be applied to an Internet recommendation system, introduces the system to a prediction model of the target domain through self-adaptive estimation of their correlation, accordingly achieves knowledge migration effectively and improves the recommendation precision of the target domain.