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。
2
Moisten and loosen the bowel, improve sleep, restore the elasticity and width of blood vessels, eliminate free radicals, is especially effective to tracheitis and pneumonia.
润肠通便，改善睡眠，恢复血管弹性和宽度，清除自由基，特别对气管炎，肺炎很有效。
3
Calculation examples show that the Symplectic difference method is effective, providing a new calculation method for the Symplectic system of mechanics of elasticity.