The simultaneous determination of multi-element in soil by ICP-AES with a CCD and the method for correction of matrix interference effect are studied and compared.

文章研究了用电荷-耦合装置电感耦合等离子体发射光谱同时测定土壤中多种元素，并对校正基体干扰效应的方法进行了研究和比较。

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The soil reaction matrix is added to beam element stiffness matrix, and modified beam element stiffness matrix is formed.

将土反力矩阵与梁单元刚度矩阵迭加，形成修正的梁单元刚度矩阵；

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The impedance function of the end bearing pile in stratified soil has been obtained by the method of transfer matrix according to the theory of continuous medium mechanics.

本文根据连续介质力学理论，用传递矩阵法求得分层土端承桩的阻抗函数。

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If we were doing it again now, the material would be taken out in its soil matrix, put in a plastic bag and kept cool.

BBC: NEWS | Science/Nature | Team widens search for 'Hobbits'