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前几年国内外学术界有个热门课题,叫蒙德尔极小期,是讲十六、十七世纪太阳黑子相对数特别低。其实北京大学已故教授王嘉荫在《中国地质史料》一书中,对明末清初(十六、十七世纪)各类自然异常显示出特高频数已充分注意到了。徐道一同志将两者结合起来,又发掘了其它资料,将公元1500—1700年自然灾异异常期命名为“明清宇宙期”。这是天地相关思想的一种具体表现。“明清宇宙期”提出之后,我国科学工作者又发现了“夏禹宇宙期”、“清末宇宙期”和“两汉宇宙期”。
A few years ago, there was a hot topic at home and abroad in academic circles, called Monder’s minimal period, which is about the relative low number of sunspots in the 16th and 17th centuries. In fact, the late professor Wang Jiayin from Peking University, in his book Geological History of China, has fully noticed that all kinds of natural anomalies in the late Ming and early Qing (16th and 17th centuries) showed extraordinary high frequencies. Comrade Xu Daoyi combined the two together and explored other materials to name the anomalous natural disasters of 1500-1700 AD as the “universe of the Ming and Qing Dynasties.” This is a concrete manifestation of the related thinking of heaven and earth. After the “universe of the Ming and Qing Dynasties” was put forward, our scientists also found “the universe of Yu Xia Yu”, “the end of the Qing Dynasty universe” and “the Han of the Han Dynasty”.