查询词典 soils

Compacted structureless clay soils can be flocculate d by the addition of neutral salts, particularly of calcium.

紧密的无结构粘土可以由于中性盐尤其是钙盐的添加而聚集。

The kinetics of fluorine adsorption in several soils was studied by using the balance method.

采用平衡法对我国几种土壤氟吸附的动力学过程进行了研究。

Rhizosphere and bulk soils were extracted by low molecular-weight organic acids to fractionate Pb fraction of soil pools, which is considered as the phytoavailable Pb.

由于受到根际酸化作用和TOC结合的影响，根际土壤有效Pb含量高于非根际，并且随着Pb处理浓度的增加，有效铅含量增加。

The purposes of this study were to develop a sequential chemical extractions scheme suitable to fractionate the forms of heavy metals associated with phosphate in neutral and alkali soils contaminated with heavy metals.

许多学者提出重金属连续萃取法(sequential chemical extractions， SCE)研究重金属存在型态大多忽略和磷酸盐之相关性，本研究拟提出适当的连续萃取步骤，探讨中性及碱性污染土壤中重金属与磷存在型态的分布及其相关性，并探讨用盐酸清洗此等土壤时，其可能移除重金属之型态及部份植物养分成份被移除的程度。

Based on the Biot s two-phase theory for fluid-saturated porous media, considering the inertia force of the solid and the liquid, and the coupling function between the solid and the liquid, and the compressibility of the liquid in allusion to the character of the nearly saturated soils. The dynamic governing differential equations are solved by Hankel transform. Then, considering the boundary condition, the dual integral equations of vertical vibration are established which are reduced to Fredholm integral equation of the second kind.

本文基于Biot两相介质动力固结理论，针对准饱和土地基的特点，考虑了流体的可压缩性，土体和流体的惯性及水土之间的耦合作用，运用Hankel变换技术求解动力控制方程，然后按混合边值条件建立起对偶积分方程，并将其化为易于数值计算的第二类Fredholm积分方程，分别研究了准饱和土半空间地基、上覆单相弹性层的准饱和土地基和准饱和粘弹性地基上刚性基础的竖向振动特性。

The hydraulic loading system is developed and used to study the frost heaving characteristics of the subgrade soils under dynamic loading in closed system and open system . On the base of these work, the conclusions are as follows:1. Because of the the fine-grained fill, the frost deformations of Beijing-Baotou railway subgrade and Baotou-Lanzhou railway subgrade are holistically irregular, and great discrepancies exist among the frost heavings of subgrade at different sections.

本文根据冻害较严重的京包铁路、包兰铁路的气候、地质条件的调查和路基冻胀变形监测，结合路基土的性质对京包铁路、包兰铁路的冻害给出了评价；为了模拟振动荷载作用下土的冻胀，研制了液压动力加载系统；在室内采用实验方法对列车动荷载作用下包兰线路基粉质土在开敞、封闭系统下的冻胀特性进行模拟。

The colonization of arbuscular mycorrhizal fungi in the roots and rhizosphere soils of rare species Magnolia cylindrica sampled from its native and cultivation habitats was examined by the methods of alkaline lysising and acid fuchsin staining.

在原产地和引种栽培地采集了国家珍稀濒危植物黄山木兰的根样及其根际土壤样品，研究了根中丛枝菌根真菌的定殖状况。

In soil mechanics theory, the soils are regarded as continua as a rule after the substance morphology is fallen into gaseity, liquid and solid. Now the continuum theory is used in most of numerical methods.

尽管连续介质的假设与实际情况不相符合，目前大多的数值计算方法都是用连续介质力学的思路去分析和研究土的力学性状。

Then, with the help of Hankel integral transform, general solutions to axisymmetric problems are obtained in the frequency field, based on which the dynamic response of the unsaturated soils half-space subjected to a vertical concentrated surface load is investigated.

利用Hankel积分变换方法，对频域内的轴对称问题进行了求解。在此基础上研究了非饱和土半空间体在垂直集中力作用下的动力响应，给出了Lamb问题的积分形式解。

Geochemical characteristics of rare earth elements in different types of soils in China.

中国不同类型土壤中稀土元素的形态分布特征。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。