A harmonic analysis for short data series is suggested to check the variation of the sensitivity and phase lag during the tidal observations.
为检验潮汐观测期间灵敏度及相位的变化，提出一种短资料的调和分析方法。
Using the 10th International geomagnetic Reference Field (IGRF) models, the latitudinal distribution of harmonic amplitude and its time-variation of geomagnetic potential are investigated.
利用第10代国际参考地磁场模型(IGRF)的资料，研究了地磁位的谐波振幅的纬度分布及其时间变化。
The fluctuation circle of aquatic products price between 1978 and 2000 via ratio of variation and harmonic wave was researched.
采用变异率指标与谐波分析法研究了1978-2000年水产品年度收购价格波动的周期性。
ADAR(ADaptive AR) predicting model is presented, whose parameters and exponent number can be adaptively tuned according to the characteristic variation of harmonic.
提出一种 自适应 自回归（ADAR）预测模型，可根据谐波过程特性变化 自适应 调整 自回归预测模型的参数乃至结构。
The background harmonic voltage is related with not only the power of harmonic sources and variation of power line voltages but also the power system structure and capability.
背景谐波电压不仅与电网中谐波源强弱、网压变化有关，而且与电网容量、结构有关。由于其直接决定电网承受畸变负荷的能力，所以有必要对各种电网的背景谐波状况作全面了解和测量。
The Variation of Radiated EM Intensity and Power Density on Spheres in Near and Far Field from Array of Time Harmonic Currents.
弦变线电流源之辐射电磁场强及功率密度在近场至远场球面上之变化。
After imposed harmonic load, the deformation and stress variation curves with change of frequency can be gained by harmonic analysis in ANSYS.
在模态分析的基本上，对行星齿轮施加简谐载荷，得到行星齿轮的变形和应力在容易产生共振的频率范围内的变化情况；
Finally, the influence induced by variation of dynamic coefficient of permeability on soil displacement and stress under harmonic vibration load is investigated.
根据算例，研究了在周期荷载作用下，地基中的超静孔隙水压力、位移的幅值随动力渗透系数变化的一般规律。
Finally, the influence induced by variation of dynamic coefficient of permeability on soil displacement and stress under harmonic vibration load is investigated.
根据算例，研究了在周期荷载作用下，地基中的超静孔隙水压力、位移的幅值随动力渗透系数变化的一般规律。
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