Based on the law of momentum conservation, the mathematics patterns of front collision and vertical side collision of motorcycles and motor vehicles are developed.
根据动量守恒定律，建立了摩托车与汽车正面碰撞及直角侧面碰撞的数学模型。
Distribution of formaldehyde emission on the side and surface from particleboard is analyzed through experiments in this paper. Some mathematics models were given.
通过实验分析了刨花板端面和平面甲醛散发的分布特征，给出了数学模型。
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