Firstly, we use actuarial survivor curve, value theory of relation marketing, and calculus thought for reference to find average channel life-span;
在模型的求解方法中，借鉴人寿保险精算学生存曲线理论、关系营销价值理论及微积分思想来求取渠道平均寿命周期；
In order to model for enterprise management process by ontology, the theory of situation calculus is thought as the basis of dynamic activity specification in modeling.
为了对企业的管理过程进行本体建模，把情景演算理论作为企业建模过程中动态活动描述的基础。
To master convenient calculus method of abacus has great advantages on cultivating thought and improving calculus ability.
掌握好珠算这种便捷的运算方法，对培养思维和提高运算能力大有好处。
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