To the operational amplifiers circuits which works at deep negative feedback mode, we adopt ideal parameter deduced form ideal model instead of actual parameter usually.
对工作在深度负反馈状态的运算放大器电路，常采用虚短虚断技术得出的理想参数代替实际参数。
Based of the former conclusions of others and some works of myself, the article deduced the pricing formula in the case of the arithmetic average and geometric average of the stock price.
本文在前人研究的基础上，结合自己所做的一些工作，分别推导出了没有中间红利的几何平均和算术平均亚式期权的定价公式。
Then fundamental formulae of semi-analytical and seminumerical method are deduced on the basis of the works mentioned above.
同时，在此基础上给出半分析半数值方法的基本公式。
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