The study about effective width in and abroad are mostly based on theory of elasticity.

国内外对组合梁混凝土翼板有效宽度的研究，弹性分析较多。

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Calculation examples show that the Symplectic difference method is effective, providing a new calculation method for the Symplectic system of mechanics of elasticity.

编程并计算了有关算例，结果表明辛差分法是有效的，为弹性力学辛体系提供了一种新的数值方法。

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A new effective way to formulate thin plate element can be realized by using the similarity theory between plane elasticity and plate bending.

平面弹性与板弯曲的相似性理论为构造薄板单元提供了一条有效的新途径。

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Especially if elasticity is low, policymakers should be seeking assurance that charities spend money in a particularly wise, effective way.

ECONOMIST: Charity and taxation