After studying the Shicha algorithm of parallax theory in Shoushi Calendar and Huihui Calendar, this paper points out that Shicha algorithm in Huihui Calendar is better than that of Shoushi Calendar about the completeness of variables, the choice of the s
After studying the Shicha algorithm of parallax theory in Shoushi Calendar and Huihui Calendar, this paper points out that Shicha algorithm in Huihui Calendar is better than that of Shoushi Calendar about the completeness of variables, the choice of the s
对《授时历》和《回回历法》中的时差算法进行比较研究表明，《回回历法》中的时差算法在自变量的完备性、符号的选择以及精度等方面，均明显优于《授时历》，该结论对评价中国和阿拉伯传统日食算法优劣有一定参考意义。