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Aiming at this problem, the concept of the second order power spectrum was proposed based on the characteristic of the amplitude tune with periodical notch spectrum in thin layer and theoretically researched. The corresponding relationship between the thickness of thin layers and the maximum value of second order power spectrum was established. The theoretical criteria and method for the thickness estimation by second order power spectrum were given. The second order power spectrum map is made by the energy relationship between the thickness of thin layers and the second order power spectrum, and the time responding to strong energy on the map is the time of thin layer.

为此，从薄层振幅调谐具有周期性陷频谱特征出发，提出了二阶功率谱的概念，从理论上对薄层的二阶功率谱特征进行了研究，建立了薄层厚度与二阶功率谱极大值之间的对应关系，给出了利用二阶功率谱进行薄层厚度预测的理论依据和方法，即根据薄层厚度和二阶功率谱的能量关系制作二阶功率谱图，图上强能量团对应的时间即为薄层时间厚度。

The results show that the identifying accuracy is 100% for both the seed and the peduncle, 89% and 96.8% for the fruit coat closing and the seedcase respectively. This approach is efficient and credible, so it can help to improve prickly ash quality detection with computer vision theoretically and technologically.

试验结果表明：该方法合理有效、程序设计可靠、识别效果良好，对椒籽、果穗梗正确识别率达100%，闭眼及果皮正确识别率分别达89%、96.8%，为进一步完善花椒外观品质的计算机视觉检测提供了理论基础和技术支持。

It is theoretically showed that the segregation has a...

这就从理论上揭示了隔离对疾病控制的积极作用。

Seismogram of earthquakes are composed by source and structure information,theoretically,people can obtain accurate mechanism of earthquakes only when we have a better understanding of structure and enough station coverage.

而地震波形包含了震源和地球结构两部分信息，理论上只有地球介质结构足够清楚后和在足够台站分布的情形下才能获得比较准确的震源参数。

The valence state and solubility of selenium in paddy soils, the dissolution equilibria of selenium and the valence changes of selenate in soil solution, the influences of redox potential and pH value on valence changes of selenium are discussed theoretically. A characteristic pH-Eh relationship is derived.

从理论上讨论了土壤硒的价态及其溶解性，土壤溶液中不同形态的硒的溶解平衡与可能存在的 Se的变价反应，土壤溶液中硒的价态转换的影响因素，特别是氧化还原电位与pH对淹水土壤溶液中硒的价态变换的影响。

Three aspects have been studied theoretically in this paper which were based on an analysis of a compliant multleaf journal self-acting air bearing, which are as follows:(1) A set of theoretical analysis method which include the development of .physical and mathematical model, the solution of governing equations and theprediction of static and dynamic performance of the foil gas bearing is proposed.

本文在分析悬臂型弹性箔片径向动压气体轴承工作原理的基础上，做了以下几个方面的工作：(1)建立了悬臂型弹性箔片径向动压气体轴承的物理和数学模型，确立并求解了控制方程，得到了静、动态性能的稳定性分析方法，为数值分析悬臂型弹性箔片径向动压气体轴承奠定了基础。

It will be of great significance both theoretically and practically in enhancing students talents for emotional self-controlling and social adaptation.

提高大学生的情绪自控能力和社会适应性是高校危机干预和思想教育中不可缺少的重要一环。

The effects of self-excitation of silicon microresonators are considered theoretically.

从理论上解释了微型硅谐振器的光自激励振动现象。

The system of phase equilibrium data of the Fe-Cu base alloy is established relatively, the spinodal decomposition range of the Fe-Cu base alloy is calculated utilizing Thermo-Calc software, The composition range of the spinodal decomposition of the Fe-Cu base alloy is prognosticated with more accuracy; The self-formed mechanism of egg-type microstructure of the Fe-Cu base alloy with spinodal decomposition in the liquid-phase region under gravity conditions is theoretically investigated. Based on the analysis and calculation of interfacial tensile stress induced by the temperature gradient in the process of solidification, the theoretical results interpret preferably the self-formed mechanism of egg-type microstructure of the Fe-Cu base alloy through the analyzing of force states of metallic droplet in the rapid solidification.

建立了较为完整的铁铜基合金系的相平衡数据体系，利用Thermo-Calc软件对铁铜基合金系的液相调幅分解成分范围进行了计算，较准确地对铁铜基合金系的液相调幅分解成分范围进行了预测；从理论上对液相调幅分解型铁铜合金卵型结构的形成机理进行了研究，基于凝固过程中由温度梯度所导致的界面张力的分析与计算，通过考察快速凝固过程中金属液滴受力情况，较好地解释了液相调幅分解型铁铜合金卵型结构的自形成机理。

This article explores strategies on developing self-regulated learning ability theoretically and practically.

本文从理论与实践相结合的角度探讨了如何在网络环境下培养学习者的自主学习能力。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。