By study the method of approximate development of surface of revolution, the mathematiccal model of approximate development, precision analysis and error correction has been gained.
通过对不可展回转曲面近似展开方法的研究，得到了回转曲面近似展开、精度分析和误差矫正的数学模型。
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ASM also provides an error correction formula deduced from matrix inversion theorem to clear up the error originated from approximate synchronous sampling.
Methods Based on central limit theorem and continuity correction principal , the formula of once approximate method and its continuity correction formula were derived.