Liu Hui (about AD 225-295), a native of Linzi, Shandong Province, was a great mathematician in Wei and Jin Dynasties and one of the founders of China's classical mathematical theory. Liu Hui is a very great mathematician in the history of Chinese mathematics. His representative works "Nine Arithmetic Notes" and "Arithmetic on the Island" are China's most precious mathematical heritage. Liu Hui has quick thinking and flexible methods, and advocates both reasoning and intuition. He is the first person who China explicitly advocated to demonstrate mathematical propositions by logical reasoning. In addition, he also rewrote a calendar called Daming Calendar. Liu Hui's life is a life of hard exploration of mathematics. Although he is in a low position, he has a noble personality. He is not a mediocre man who seeks fame and fame, but a great man who never tires of learning. He left a precious wealth to our Chinese nation.
Zu Chongzhi (429- 500 AD) was an outstanding mathematician, astronomer, writer, geologist, geographer and scientist in China. People in the Southern and Northern Dynasties, Han nationality, the word Wen Yuan. Born in Yuanjia for six years, he died in Hou Yongyuan and Qi Hun for two years. His ancestral home was in Kuai County, Fanyang County (now Laishui County, Hebei Province). In order to escape the war, Zu Chongzhi's grandfather, Zuchang, moved from Hebei to Jiangnan. Zuchang is a "great craftsman" in Liu Song, in charge of civil engineering, and Zu Chongzhi's father is also an official in North Korea.
Zu Chongzhi calculated the value of pi to seven decimal places for the first time in the history of mathematics in the world, that is, between 3. 14 15926 and 3. 14 15927. He put forward the agreement rate of 22/7 and the density rate of 355/ 1 13, which were first put forward in the world, more than a thousand years earlier than in Europe, so some people advocated calling it "the ancestor of pi". He compiled his mathematics research results into a book called Seal Characters, which was once regarded as a mathematics textbook by Chinese studies in the Tang Dynasty. His Da Ming Li introduced precession into the calendar for the first time. It is suggested that 39 1 year set 144 leap month. The length of a tropical year is 365.338+04438+0 days, and the error is only about 50 seconds. He is not only an outstanding mathematician and astronomer, but also an outstanding mechanic expert. Rebuild all kinds of exquisite machinery, such as South Guide Car and Thousand-mile Ship, which have long been lost. Besides, he also studies music. His works include Interpretation of the Analects of Confucius, Interpretation of Filial Piety, Yi, Lao, Zhuang and Yi Shu Ji, but they have long been lost.
Li Daoyuan (about 470-527) is good at writing. Han nationality, Fanyang Zhuolu (now Zhuolu County, Hebei Province). Northern Wei geographer and essayist. My career was bumpy, but I didn't do my best. He has read many rare books. When I was young, I went to Shandong with my father to seek waterways. Later, he traveled the Qinling Mountains, north of Huaihe River and south of the Great Wall, inspected rivers and ditches, collected relevant customs, historical stories and myths and legends, and wrote 40 volumes of notes about water mirrors. The writing style is meaningful and vivid, which is not only a colorful geographical work, but also a collection of beautiful landscape prose. It can be regarded as the pioneering work of China's tourism literature, which has a great influence on the development of later tourism prose. In addition 13 local chronicles and 7 appointments have been lost.
Jia Sixie (Ji γ s γ xié) was born in Northern Wei Dynasty (AD 386 ~ 543), Han nationality and Yidu (now southwest of Shouguang City, Shandong Province). He lived in China in the late Northern Wei Dynasty and the Eastern Wei Dynasty (6th century AD), and was once the magistrate of Levin County (now Linzi, Shandong Province). He was an outstanding agronomist in ancient China. Author of Qi Yaomin's Book, 92 books * * *, divided into ten volumes, with about 70,000 words in text, 40,000 words in notes and 110,000 words in * *; In addition, there is a preface and a miscellaneous statement in front of the book. Cited more than 50 kinds of previous works/kloc-0, and recorded more than 30 agricultural proverbs. The book introduces the cultivation methods of crops, vegetables and fruit trees, the production of various economic trees, the utilization of wild plants, the breeding of livestock, poultry, fish and silkworms and the prevention and treatment of diseases, as well as the processing, brewing and food processing of agricultural and sideline products and livestock products, and even the production of stationery and daily necessities. Almost all agricultural production activities are discussed in detail. It is of great significance in agriculture.
The spirit is similar, caring for the people, promoting the benefits and eliminating the evils, respecting practice, applying what you have learned, learning with an open mind, striving for perfection, working hard and not expecting anything in return. Put it off if you want to write anything.