The dual-frequency carrier phase observation equation is built and ionosphere-free predigested, the estimate formula of zenith wet delay is deduced with least square method.
建立了双频载波相位观测模型，并将其进行无电离层延迟化简，用最小二乘原理推导了天顶湿延迟的估值公式。
By using of this formula, the accurate mean and mean square responses of a linear or an equivalent linearized nonlinear vibration problem can be obtained.
应用该公式可以求出线性和等价线性化的非线性振动系统的精确稳态均值和均方响应。
Solve the daily problems to further grasp the formula of area and perimeter of rectangle and square.
在解决生活中实际问题的过程中，进一步掌握长方形和正方形的周长、面积及相关问题的计算方法。
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