Stratum is an important idea of three dimension strata model. It plays a key action in instauration of three dimension strata model.
地层作为三维地层模型的一个重要概念，在三维地层模型的建立中起着关键作用。
These layers are called strata and a single layer is called a stratum.
这些岩层被称作地层（strata）（stratum的复数形式），单个岩层称为stratum。
It seems that mathematical ideas are arranged somehow in strata, the ideas in each stratum being linked by a complex of relations both among themselves and with those above and below.
数学观念似乎以层级的方式排列的，每一层的观念以复杂的关系与同层的和上下层的观念相联系。
The facts show that the Sinian-Cambrian metamorphic rocks in the area is not just a simple monoclinal stratum, bat the complex folded strata with limited thickness of each layer.
讨论推知：政和石屯附近所见的震旦-寒武纪变质岩地层不是“巨厚的单斜层”，而是单层厚度十分有限的变杂褶皱地层。
From the attitude of strata and the number of characteristic point at an underground non-bedded shape room, the method to determine the equation of stratum structure was presented.
根据非层状地下空间处地层产状及定位特征点数，给出了确定地层构造形态的方法。
The results show that bed separations mainly occur below the key strata, and the highest bed separation space is right below the primary key stratum.
结果表明：覆岩离层主要出现在各关键层下，覆岩离层最大发育高度止于覆岩主关键层。
The results show that changes of REE contents in strata reflect the matter sources and sedimentary environmental changes and may provide effectual information for stratum partitioning;
结果表明：地层中稀土元素含量的变化反映了物源环境，为地层划分提供了有效的信息；
In order to solve the 3d automatic modeling problem of strata based on Generalized Tri-prism (GTP), a kind of 3d stratum structure knowledge inference rule and modeling method is put forward.
为了解决基于广义三棱柱(GTP)的三维地层模型自动建模问题，提出了一种三维地层构造知识推理规则和建模方法。
Using situational attribution questionnaire and selecting the white-collar stratum and blue-collar stratum as subjects, this study discusses the attribution of people from different social strata.
采用情境归因问卷，选取白领和蓝领两个阶层作为被试，研究不同社会阶层人的归因倾向。
The vital problems to be solved in Shendong mine are the dynamic pressure damage of thin rock strata roof under thick sandy soil soft stratum and the loss of water and soil under mining.
浅埋煤层薄基岩厚砂土松散层顶板动压灾害和采动水土流失是神东矿区急需解决的重大问题之一。
Based on the key stratum theory, the structure characteristics and movement laws of overlying strata with different mining height are studied.
运用关键层理论研究了采场覆岩结构特征及运动规律。
It was found that the relative hard strata not only formed horizontally but also vertically; and the vertical stratum has a relationship to the hydrodynamics.
研究发现：沿海床剖面不仅存在水平硬层，同时也存在竖直硬层，且竖直硬层与水动力条件有关。
According to I ts origin, sapphire sand strata are divided into sand wash stratum, pluvial stratum and relict drifted sand stratum, while sapphire concentrated well in drifted sand stratum.
根据成因蓝宝石砂矿层分为冲积砂矿层、洪积砂矿层和残坡积砂矿层；洪积砂矿层中蓝宝石最富。
The comprehensive study of complex effect of key stratum plays an important role in understanding control mechanism of key stratum in overlying strata within mining influence.
研究关键层的复合效应对深入揭示关键层在采动覆岩中的控制机理具有重要推动作用。
The comprehensive study of complex effect of key stratum plays an important role in understanding control mechanism of key stratum in overlying strata within mining influence.
研究关键层的复合效应对深入揭示关键层在采动覆岩中的控制机理具有重要推动作用。
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