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对航放异常矩形反演使用的理论Z量板进行了水泥板模型验证,解决了在航放实测条件下难以验证以及如何消除验证模型对γ射线的等效空气吸收系数与空气本身对γ射线的吸收系数不同的影响等问题。验证结果表明,该量板是正确的,可用的。 相似文献
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Raymond Hide 《Geophysical Journal International》1998,135(3):1150-1152
Several dynamic agencies control differential rotation between various regions of a rotating gravitating body such as a planet, namely advection of angular momentum (within fluid regions) and torques due not only to (a) viscous forces, (b) dynamic pressure forces and (c) gravitational forces, but also to (d) Lorentz forces (involving the flow of electric currents in electrically conducting regions), (e) magnetostatic forces (when magnetized material is present) and (f) electrostatic forces (due to the presence of electric charges). Torques due to (a), (b), (c) and (d) have already been treated in the literature, some extensively. It is of general theoretical interest to derive from first principles mathematical expressions for torques due to (e) and (f), even though they turn out to be quantitatively insignificant in the case of the Earth. 相似文献
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本文简要介绍了电磁偏移的基本原理和低频滤波的偏移处理方法,并详细论述了最佳极值时刻T的求取方法。电磁偏移以斯特莱顿-朱型积分为理论基础,借助于无限均匀介质中的格林函数,描述了似稳电磁场在下半空间的传播过程。利用电磁偏移方法处理TEM资料,能够较准确地确定局部导电地质体的空间位置,处理速度快,解释结果形象。 相似文献
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Hypothesis of possible superconductivity of the iced matter of the rings of Saturn (based on the data of Voyager and Pioneer
space missions) allow us to explain many phenomena which have not been adequately understood earlier. Introducing into planetary
physics force of magnetic levitation of the superconducting iced particle of the rings, which interact with magnetosphere
of the planet, becomes to be possible to explain origin, evolution, and dynamics of the rings; to show how the consequent
precipitation of the rings’ matter upon the planet was concluded; how the rings began their rotation; how they were compressed
by the magnetic field into the thin disc, and how this disc was fractured into hundreds of thousands of separated rings; why
in the ring B do exist “spokes”; why magnetic field lines have distortion near by ring F; why there is a variable azimuth brightness of the ring A; why the rings reflected radio waves so efficiently; why exists strong electromagnetic radiation of the rings in the 20.4
kHz–40.2 MHz range and Saturnian kilometric radiation; why there is anomalous reflection of circularly polarized microwaves;
why there are spectral anomalies of the thermal radiation of the rings; why the matter of the various rings does not mix but
preserves its small-scale color differences; why there is an atmosphere of unknown origin nearby the rings of Saturn; why
there are waves of density and bending waves within Saturn’s rings; why planetary rings in the solar system appear only after
the Belt of Asteroids (and may be the Belt of Asteroids itself is a ring for the Sun); why our planet Earth has no rings of
its own. 相似文献
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基于精密单点定位技术的GPS辅助航测技术的推广应用,节约了传统像片控制测量的作业成本,优化了传统空三加密工序的技术流程,缩短了航测成图周期。以1∶25000地形图测绘生产为例,介绍了并进行基于精密单点定位的GPS辅助空三试验,分析并比较了空三方法的加密精度,得出了基于精密单点定位的GPS辅助摄影进行中小比例尺航测成图时新的像控布点、像控测量以及GPS辅助空三加密的方法。 相似文献
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Vincenzo Cuomo Vincenzo Lapenna Maria Macchiato Carmine Serio & Luciano Telesca 《Geophysical Journal International》1999,139(3):889-894
We explore the inner dynamics of daily geoelectrical time series measured in a seismic area of the southern Apennine chain (southern Italy). Autoregressive models and the Higuchi fractal method are applied to extract maximum quantitative information about the time dynamics from these geoelectrical signals. First, the predictability of the geoelectrical measurements is investigated using autoregressive models. The procedure is based on two forecasting approaches: the global and the local autoregressive approximations. The first views the data as a realization of a linear stochastic process, whereas the second considers the data points as a realization of a deterministic process, which may be non-linear. Comparison of the predictive skills of the two techniques allows discrimination between low-dimensional chaos and stochastic dynamics. Our findings suggest that the physical systems governing electrical phenomena are characterized by a very large number of degrees of freedom and can be described only with statistical laws. Second, we investigate the stochastic properties of the same geoelectrical signals, searching for scaling laws in the power spectrum. The spectrum fits a power law P ( f )∝ f −α , with the scaling exponent α a typical fingerprint of fractional Brownian processes. In this analysis we apply the Higuchi method, which gives a linear relationship between the fractal dimension D Σ and the spectral power law scaling index α : D Σ =(3− α )/2. This analysis highlights the stochastic nature of geoelectrical signals recorded in this seismic area of southern Italy. 相似文献