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地磁太阳黑子周变化起源的讨论 总被引：1，自引：1，他引：1
为了避开60年代末和70年代末Jerk(H)、Jerk(Z)的影响,分析了1979～1998年西欧4个台和1979～1999年亚洲东部6个台的H、Z资料,结果表明各台间H(或X)分量的太阳黑子周变化一致性较好.但Z分量的太阳黑子周变化显示出非常特别的现象,Z变化的相位随台站经度变化而变化,东亚地区的Z变化几乎与西欧地区的变化反向.因此,东亚地区的Z变化与H变化的关系不符合P01模式的假设,外源场之说似乎不能解释. 相似文献
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2000年Jerk存在吗 总被引：2，自引：0，他引：2
陈伯舫 《地震地磁观测与研究》2006,27(5):50-52
从分布在欧亚美太平洋几个质量较好的台站的dY/dt变化曲线看,2000年或2001年似乎没出现新的Jerk(Y)。 相似文献
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The Study of Two Geomagnetic Jerks in China 总被引：1，自引：0，他引：1
This paper analyzes the first differences of the annual means (annual rate) for the Y and Z components of the geomagnetic field from nine magnetic observatories in China, measured from 1985 to 2003. The 1991 jerk was obvious in the Y component measured but not clear for the Z component. Rapid changes in the Z components were ubiquitous around 2000 -2001, but not seen for the Y component. External effects were removed from the monthly means by comparing the monthly mean of the geomagnetic field components at the observatories with the monthly time series of the Ap geomagnetic index. However, some examples were analyzed and showed whether external effects were removed or not, there was no marked distinction in determining the jerks in China for the Y component and the Z component of the geomagnetic field. Finally, the isolines of the first differences of the annual means were used to analyze the spatial and temporal distributions of the jerks. 相似文献
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《New Astronomy》2022
The thermodynamic viability of some dark energy models reconstructed through the cosmological jerk parameter is investigated. Some models, already available in the literature, are picked up for the purpose. The models are broadly classified in two categories, depending on whether there is an interaction in the dark sector or not. The validity of the Generalized Second law of Thermodynamics (GSL) is used as the diagnostics. Hayward–Kodama temperature is considered in place of Hawking temperature in order to account for the dynamical nature of the spacetime. It is found that depending on the parametrization ansatz for jerk, the total entropy is increasing with time, so it is quite possible to find viable models. This holds even with an interaction in the dark sector. 相似文献
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