# Huizhou technology

Huizhou technology

Mathematics

The four yuan yu jian "dynasty famous mathematician Zhu Shijie. He put the & other; Tianyuan art & throughout; (that is, the unary algebra) development for & other; Four yuan art & throughout; (i.e., multiple algebra), & other; Difference method & throughout; Expound clearly. But because of the war, lost in the book. Rapidly until qing daoguang for two years, and the mathematician Luo Shilin regain this book, with the advanced mathematics accomplishment and indomitable spirit of hard work, after 12 years, completed in 1835. "four yuan yu jian fine grass." The book is the original book 3 volume expansion is 24, its length is more than the original book several times. Because Luo Shilin work, makes brilliant creation in the history of mathematics in China & ndash; & ndash; & other; Four yuan art & throughout; And recovery.

"Calculate teaching cases of" Ming cheng dawei tunxi famous mathematician. Full name "new points to calculate teaching cases", is a popular focus on practical mathematics textbooks. Includes the content can be collected from various practical mathematical problems and mathematical methods, according to the order of the "nine chapter arithmetic", is divided into nine chapters, respectively described integer, scores of add, subtract, multiply and divide, chengfang, prescribing mathematics basic knowledge, etc. According to the surveying of land, corn, difference, and less ShangGong, all lost, surplus Nv, equations, hang up, such as nine, various mathematical problems and solution are described. Essence part of the book, is comprehensively introduced the abacus abacus calculation methods and GuiChu formula, and graphical detail, so as to greatly promote the abacus in the application of social life, promote the development of social economy.

The HengZhai suanxue rapidly in the qing dynasty and the mathematician wang lai. In seven volumes of cyclotomic surgery, series, equation theory there are many problems such as the original opinion, the study of the equation root, especially more original.

"Ten books is the recovery" "is the" ten books including "weeks of time to calculate the", "nine chapter arithmetic", "the island is the," "the grandson is the", "five is the cao", "xiahou Yang is the", "zhang Qiu Jian calculate by", "the five classics arithmetic", the "ancient calculate sutra, heritage" arithmetic ", is the essence of ancient Chinese mathematics, reflects the ancient Chinese mathematics achievement, represented the highest level in the world at the time. After the Ming dynasty, "is the" ten books successively oblivion lost, famous thinkers of the eighteenth century, dai zhen, pick up the slack. Inherit and promote Chinese traditional mathematics, "is the" ten books for collating and audit, make basic rendering, carry forward the mathematics to make special contribution for our country.

The theory of fixed point class continuous DE people Jiang Zehan. Jiang Zehan as the founder of the topology research in China, starting from the late 50 s, he and his team together, break the logjam in the stagnation of fixed point class theory for many years, created a new way, taking system of research results, the topology theory innovation contribution is bigger. The book is a summary of research results.

Physics

White light dispersion phenomenon research on white light dispersion phenomenon, someone notice as early as the northern and southern dynasties in China, but the earliest incisive explanation of this phenomenon is the southern song dynasty period of Hugh Cheng Dachang better people. In the play book "volume 9 explicitly pointed out that colored light from the sun, touch the dispersion phenomenon, the essence of knowledge of the nature of dispersion Yu Hong also has a huge role in promoting.

"Mirror mirror cold chi" in the qing dynasty famous experimental physicists Zheng Guangfu. The book is divided into five volumes, the color of the object, the light straight line dissemination, reflection, refraction, reflection mirror and lens imaging, optical instrument manufacturing all did full detail. The book also introduces the principle, device and modulation method of slide projector, introduces several methods for astronomical observations with a telescope, greatly enriched the Chinese ancient science and technology treasure house.

Biology

The quail spectrum qing ning people Chen Shilin. The book points & other; The original & throughout; , & other Method & throughout; , & other Raise the method & throughout; Three parts, about 61 varieties, is a form and the habits of quail, breeding method, narrative is extremely comprehensive spectrum, to sink into the breeding industry still has a reference value.

"Agricultural book" continuous DE county Yin yuan dynasty acla). Divided into farming on tactic, the farmers ", "valley of the spectrum of three parts, the book is illustrated, and summarized the north and the experience of agricultural production in our country, occupies an important position in agricultural science and civilisation.

The wide spectrum qunfang Wang Hao etc by the kangxi emperor in qing dynasty, on the basis of the Ming dynasty Wang Xiangjin the "qunfang spectrum", to add or delete repair, make the book more rigorous, more rich content. A total of 100 volumes, adaptation to complete in 1708.

"Depicting flowers Wu Song the huangshan mountain flowers monograph in the qing dynasty. Huangshan all 35 species of flowers, one by one to describe its character, flowering, producing area, writing concise, fascinating. The first book of account of huangshan mountain flowers, is of high historical value.