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Liu Zhuo is the Sui Dynasty8/13/2009
Sui Liu Zhuo is an outstanding astronomer, he was 604 very Imperialcalendar year, later called Miao Li Chatham House. One of the first letter he Cheung found that the introduction of the three calendars, and successfully resolved the three found in the specific application of computing and reasonable.
Wong extremely calendar, the 24 solar terms containing the uneven movement of the sun, as the correction value table day course of stars form, which is passed down since the first day a complete course of stars form, that is, its predecessor, DAVID letter into the gas poor . Follow precedent in the application form on time to correct any calculation, Liu Zhuo, such as the first pitch of the second difference interpolation. The physical meaning of mathematical methods is to the sun within a certain period of time depending on the rate of movement as a uniform speed up or slow down the absorption. This approach can solve the uneven movement of the sun, as the calculation. On this basis, Liu Zhuo successfully resolved taking into account, the uneven impact of sports on the Moon will be calculated so that the calculation of real timeaccuracy can be improved.
Wong extremely calendar also contains a five-star plus or minus value to the gas form, which made possible a rather short letter from Cheung. Importantly, Liu Zhuo first morning of the projected five-star moment see the Oriental method of three paragraphs Ping See - FAQ - open-minded law. That the first movement of the sun and the Five-Star is regarded as uniform, and thus can be considered see ping times T0 times into the air by the five-star plus or minus five-star campaign table to achieve non-uniformity corrections t, is common time T0 t then follow precedent table on uneven movement of the sun calculated correction values T, then formed my own views at all times T0 t T.
Eclipse on the moon and the study of imperial history louis vuitton is contained in a very do not push the food operation should eat and eating and drinking should not push technique , 34 This is the third largest Cheung39s letter found in supplements and the development of specific . In addition, Liu Zhuo also the louis vuitton handbag replica first time the poor eat food at the size of the solar eclipse the impact of the specific algorithm, as well as Eclipsetime is calculated, and the deficit for the Eclipse from an unprecedented position to discuss in detail.
Liu Zhuo and white, or zodiac degrees Transform Road places pioneer. He has measured time difference of 75 years difference between the new-year-old, this is a very accurate value. He was thousands of miles away from the North and the South, a difference of one inch in lengthold said the attitude of opposition, and be verified by the measured specific recommendations. Unfortunately, this proposal along with the emperor he had not been adopted very calendar, but his performance is not a scientific indelible.
And Liu Zhuo at the same time, another astronomer Zhang Zhou Xuan, the letter also draw on the results of the work of DAVID, about 610 years into the great cause of the calendar. Although the calendar for the great cause similar problems as the disposal of the imperial calendar very well, but also a unique, particularly in the five-star research movement is most prominent. Zhang Zhou Xuan cycles measured five-star to join are as follows 398.882 on Jupiter on error 0.002, 779.926 on Mars on error 0.011, 378.090 Saturn Day error 0.002 days, Venus on 583.922 p less than 0.001, the Mercury 115.879 Day error 0.001 days, which are made in ancient China the best results. Also, Zhang Zhou Xuan joined on the five-star in a cycle when a description of the dynamics of that paragraph in some dynamic, five-star operation arithmetic progression rate according to changes and to resolve the difference of the level of the problem of summation, in astronomy and mathematics are important.
Fourth, his party and its Premium calendar
Line 683-727, theChangle now in Henan South County, and then name Zhang,in the Tang Dynasty, in astronomy there is a very high attainments, he was an astronomical calendar system of ancient China the main contribution to the following three aspects
1. The establishment of Premium calendar and innovation
In AD 728, Zhang said that the completion of his playing on the big Deyan calendar. This calendar for an act to carry out a large number of astronomical measurement, and Chinese and foreign calendar system had an in-depth research, in the basis of inheriting the tradition, a lot of innovation.
From the calendar structure of the arrangement, the total is divided into seven chapters 35 Step in the New Moon calculation cycle,, etc., Convergence of Step-fat 72 designate the calculation, etc., Step on follow precedent on the calculation of the solar movement, from the moon on the movement of the moon, the step-by-step track leakage calculatedand the length of louis vuitton products suppliers day and night, Fair-step Eclipse of the Sun and Step Five-Star on the five-star campaign basis. They have a reasonable structure, rigorous logic, the system features a complete, future generations are therefore calendar has become a model for calendar style. Content inspection, and its innovations are
Uneven movement of the sun as a description of a new, corrected letter Cheung, Liu Zhuo follow precedent since the days of the failure table, the first of China39s ancient laws on the whole day in line with the actual course of stars form. Follow precedent in the use of on table at any one time to correct the value of the sun, as the movement of the calculation, line spacing ranging from the invention of the second difference interpolation, this is the appropriate method Zhuo important development.
The movement of his five-star to a new exploration and description of the recent movement to establish a five-star point of the new concept, a five-star has a clear point of measurement by the work of Huang. If he thought that 728 years, wood, fire and soil Samsung recently by Huang points were 345.1 , 300.2 and 68.3 , this theoretical value with the corresponding errors were 9.1 , 12.5 and 1.6 , there is a world in recent days at Saturn Huang accuracy has been achieved by a very high level. 36 and his party also has the first five-star point expounded the concept of precession, and for the annual precession of the specific values. Five-Star campaign in the description of non-uniformity, the invention of his five-star contraction surplus value table, which is based on the recent five-star point for starting point, every 15 louis vuitton handbags for a five-star line degrees and the actual degree of difference between the average line of the numerical form. Accordingly, the re-application of the second bad pitch interpolation, calculation at any one time five-star corrections uneven movement, both louis vuitton handbag the forms and methods, such as Cheung39s letter to the gas addition and subtraction approach a big step forward.
Premium Li also pioneered the sundial missed nine, nine of the calculation to take poor. On behalf of the calendar before the sundial in the calculation of leakage, poor food when the seat is limited to Kyoto, the result is not adapted to large areas of the country that is, a land of 9 of the actual situation, the new algorithm, they had only shared in the capital39s calendar, to promote genuine national calendar, its significance can be imagined. Moreover, in the new algorithm, but also contains a line into the world39s first tangent function table, and the mathematics is of great significance. 37
2. The production of new equipment

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