查询词典 inversion problem

The Kamide-Richmond-Matsushita magnetogram-inversion algorithm is used to study the electrodynamic features of auroral electrojets. It is concluded that there is also two components in the westward electrojet in the midnight sector, i.e., electric field-driven and conductivity-driven components.

利用Y.Kamide等发展起来的地磁反演电离层电磁学量方法，研究了极区电激流电动力学特性，结果表明子夜附近西向电激流也可由两部份组成，即分别由电场驱动和电导率驱动。

There are thinks the double features of saline and alkaline for the formation and evolutionprocess of the salinization soils in this region,the generation intensity and scale are related withgeomorphological types,shallow water geochemical types,shallow water table and soil structureetc.,presents the quantity relationship between the salinization degree of the soils,shallow watertable and mineralization,expounds the four stage and seasonal succession features of slattransference and inversion,discuss the interaction between ions in shallow water and soils and thethe regularity of the salt transference and accumulation under freeze-thaw action.

本文在野外调查、监测及实验研究的基础上提出松嫩平原盐渍土的形成过程存在盐化与碱化双重作用，其发生强度和规模与地貌、潜水类型、径流条件、潜水水位、土壤结构有关，提取出潜水埋深、矿化度与土壤盐渍化程度关系的定量指标，以及土壤盐分迁移转化季节性变化的四个阶段及其特征。同时重点研究了潜水与土壤之间元素交互作用及冻融作用下盐分迁移和聚积规律，为土壤次生盐渍化的防治提供了理伦依据和技术支撑。

The Xujiahe formation in south Sichuan basin is featured by continental clastic sedimentary, thin sand mud interbed, and the welldeveloped sandstone in this area, however, its lithology is tight and its physical properties is poor. In the case of gas bearing, the acoustic velocity difference between the sandstone and the shale is too little to make clear responses on seismic data, as a result, it is very difficult to conduct the gasbearing prediction and to analyze the gasbearing range distribution by means of conventional impedance inversion and hydrocarbon detection.

四川盆地蜀南地区上三叠统须家河组为一套砂泥岩互层的陆相碎屑岩沉积，砂岩发育，但岩性致密，物性较差，砂岩储层含气后的速度与页岩速度相差不大，在地震剖面上无明显的响应，因而采用常规波阻抗反演和含气检测技术不能有效解决该类含气储层识别问题和含气范围展布问题。

Thus,the standard for reservoir dividing and sorting is established combining with the data as core experimental analysis,logging,well log,well testing and geologic studying. This paper describes the reservoir distribution in wells and predicts 3-D reservoir distribution of Archaeozoic reservoir in the Chengbei-30 burried hill with 3-D seismic inversion.

为此，岩心、录井、测井、试井结合建立了储集层划分和分类标准，识别描述了井点储集层的分布；以井点储集层为约束条件，应用三维地震反演技术，预测了埕北30潜山太古宇油藏的储集层三维空间展布。

We analyze the focusing inversion which is based on the minimum gradient support functional provided by Zhdanov, M.

我们在分析了Zhdanov（2004）提出的基于最小支撑泛函聚焦反演方法的基础上，在目标函数中引入对角梯度支撑以改善倾斜电性分界面的反演效果。

The Laplace transformation is the main method used in this paper, and lastly by using Durbin numerical inversion method, Timoshenko beams have been solved under various restriction conditions.

本文采用Laplace变换的方法，最后利用Durbin数值反演的方法对各种约束下的Timoshenko梁模型进行了求解。

Firstly, the principles of Rayleigh wave, which are the foundations of Rayleighwave velocity inversion, are introduced.

本文首先介绍了瑞雷波的理论基础，这也是瑞雷波速度反演的基础。

The Genetic Inverse Method is used to the QP layer model parameter inversion.

用遗传算法进行了QP层模型电离层参数的反演研究。

Several combining with middle school mathematics teaching Abstract: combining the number is the number of more abstract corresponding relation and the geometrical graph, combine to solve the problem of abstract concepts to materialize and intuitive, intuitive, abstraction, and systematic problem to reduce the difficulty of the problem, and to help students thinking transformation and training students' ability.

数形结合与中学数学教学摘要：数形结合就是把较为抽象的数量关系和与其对应的几何图形相互结合起来解决问题，使抽象的概念直观化、具体化，使直观的问题系统化、抽象化，从而达到降低难题的难度、帮助学生思维转换、培养学生能力的作用。

Finally by constructing an auxiliary problem, using addition theorem and applying an iterative process based on results obtained for the linear problem, the existence and uniqueness of the weak generalized solution of the nonlinear problem is proved.

解决了线性问题后，本文构造了辅助问题，利用迭加原理，并基于线性问题的主要结论运用迭代过程，最终证明非线性问题存在唯一广义弱解。

Chinese traditional virtue is humility and wariness,the compliment and praise to the others should be declination

中国人的传统美德是谦虚谨慎，对别人的恭维和夸奖应是推辞。如

We bought this house on the never-never.

我们以分期付款的方式买下这座房子。