Based on the crystal plasticity theory and mathematical theory of statistics, the relation of flow stress fluctuation quantity to grain dimension as well as billet dimensions was built.
基于晶体塑性理论及数理统计理论，建立了流动应力波动幅度与晶粒尺寸和坯料几何尺寸间的关系。
As a raw material need in large quantity in oil refining chemical enterprise, catalyst 's price fluctuation is one of factors to influent product cost.
催化剂作为炼油化工企业大量需求的原料，其价格的波动是影响产品成本的因素之一。
The money quantity theory claimed that money is exogenous from the relation of money quantity and aggregate price fluctuation;
货币数量论从货币数量与物价变动的关系得出货币具有外生性；
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