求翻译：摘要 星期制是公历和儒略历的组成部分，蔡勒公式就是一个推算公历日期是星期几的数学式．本文根据儒略历在其历史演变各阶段的不同特点,运用天文学和数学知识分别推导儒略历各阶段的星期公式，使对星期的求算前推了1626年之多;并将之转换成计算机能够识别和执行的Microsoft Excel公式代码，实现推算星期序号的自动化；同时推导出儒略历与公历之间的换算公式，为实用提供帮助．是什么意思？

The summary of the week system is part of of the Gregorian calendar and the Julian calendar, Cai Le formula is a projected calendar date is the day of the week's mathematical. According to Confucian slightly calendar evolved in its history, the different characteristics of each stage, the use of ast

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