The Local wave decomposition method is used to suppress the cross-term for multiple signals in higher order time-frequency distributions and the simulated results are satisfactory.
This paper performs one-way wave decomposition for 3D wave equation, and 2 kinds of high approximation of up-going wave equation in low order differential equation system are derived.
The fractal features of decomposed modes of the common faults of a rotating machine were analysed by the principle of local wave decomposition, which was a novel method for fault diagnosis of a rotating machine.
The results show that the model can simulate the higher harmonics generated on the front slope and the wave decomposition behind the breakwater to analyze the strongly nonlinear wave characteristics.
1. Since Local wave decomposition and wavelet decomposition have many similarities, detail researches have been done to compare their similarities and differences both in theory and in application — one and two dimension decomposition, singularity detection, data compression and time-frequency analysis, which offers an new idea for further study on local wave.
In this paper, the basic principle of τ-p transform is reviewed and the relationship between τ-p transform and plane wave decomposition is discussed in detail.
By use of the method of plane wave decomposition this partial differential equation is transformed into an ordinary differential equation.
It is shown that, despite a nonlocal form of the quasipotentials, the three-dimensional equations for the wavefunctions can be reduced to the one-dimensional equations using the partial wave decomposition.
As a second approach we use a more refined numerical technique based on vectorial plane wave decomposition with periodic boundary conditions, which we formulate to include material anisotropy.
A method for wave decomposition in computations for nonlinear dynamical three-dimensional towing systems
A method to obtain rotation based on direct differentiation of the random field is proposed with a reference to a second method based on wave decomposition.
This paper presents a fundamental solution for shallow shells with an arbitrary quadratic middle surface by the method of small parameters through plane wave decomposition of the eighthorder partial differential equation of the shells.Based on the solution thus obtained, the Green's functions for the deformations and internal stresses of infinite shallow shells with an arbitrary quadratic middle surface have been obtained. These can be used in the Boundary Intergral Equation Method for analyzing such shells...
This paper presents a fundamental solution for shallow shells with an arbitrary quadratic middle surface by the method of small parameters through plane wave decomposition of the eighthorder partial differential equation of the shells.Based on the solution thus obtained, the Green's functions for the deformations and internal stresses of infinite shallow shells with an arbitrary quadratic middle surface have been obtained. These can be used in the Boundary Intergral Equation Method for analyzing such shells with arbtirary boundary conditions under arbitrary loadings. This method needs much less computer storage and computer time of analysis than the conventional Finite Element Method.
In this paper, the method of response coefficient in terms of rectangular wave decomposition is improved; therefore the calculation results are made more precise.
本文改进了按矩形波分解的反应系数法,从而提高了计算精度.
2-D seismic lines along a major fault can not be used to ascertain the structural configurations at the two sides of the fault because fault surface waves and diffractions interfere with reflections severely. Wide line profiling along the fault line favours ascertaining the structural configurations at the two sides of the fault because of its higher S/N ratio and convenient spatial wave decomposition. The processing and interpretation of wide line profiling seismic data can offer many informations such...
2-D seismic lines along a major fault can not be used to ascertain the structural configurations at the two sides of the fault because fault surface waves and diffractions interfere with reflections severely. Wide line profiling along the fault line favours ascertaining the structural configurations at the two sides of the fault because of its higher S/N ratio and convenient spatial wave decomposition. The processing and interpretation of wide line profiling seismic data can offer many informations such as the horizontal position and depth of reflecting point,the strike and true dip of formation,etc. The structural configurations nearby the fault can be clearly mapped. In Y area where several year's explorations had been done but no success gained,the structural configurations were ascertained by ma- king use of wide line profiling,then high oil product was gained.On the basis of this successful exploration experience,the author put for- ward the field operation and data interpretation methods of 6-fold 4-line wide line profiling.The good future is foretold of wide line profiling in researching into complex geological structure.
沿断层布置的二维地震测线,往往由于反射波,断面波和绕射波的相互干涉,无法查清断层两侧的构造形态。沿断层布置的宽线剖面,有利于查清断层两侧构造形态,因为宽线剖面有较高的信噪比,便于波的空间分解。对宽线剖面作进一步的处理和解释,可获得地下反射点的平面位置、埋深、地层走向及真倾角等信息,并给出断层附近的构造形态。在多年勘探没有进展的 Y 区,采用宽线剖面后,查清了构造形态,获得了高产油流。根据该区勘探经验,作者提出四线六次覆盖的宽线剖面简易施工及资料解释方法,并指出应用宽线技术研究复杂地质构造的前景。
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波分解
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