An elastic calculation of ship launching has been developed for the structural safety of ship during launching operation.

为保证船舶下水过程中的结构安全，提出了一种船舶弹性下水计算方法。

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This method are with a high accuracy and real time application, and can be applied in the calculation of allowable launching area of air to air missile in air borne fire control system.

提出了一种确定目标进入角的原理和方法，这种原理和方法具有较高的计算精度和实时性，易于工程实现，可用于机载火力控制系统完成空对空导弹允许发射区计算。

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This paper presents the stability calculation for box culvert's launching into water with gas cushion combining an engineering project, the result of which can be used to guide construction.

结合工程实例，介绍直接利用气囊搬运箱涵下水时的稳定计算，并用计算结果指导施工。

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