%0 Journal Article
%T A METHOD FOR CALCULATING THEDATE OF BOUNDARY TEMPERATURE USING SPLINE INTERPOLATION<br>求算界限温度日期的一种新方法──样条函数插值法
%A Zhang Lianqiang Zhao Xinping Ouyang Zongji Zhao Youzhong
%A <br>张连强
%A 陈端生
%J 地理学报
%D 1993
%I 
%X Using the data of monthly mean temperature of a year, the annual temperature curve was simulated by means of the spline interpolation. On the basis of the simulated curve, the beginning/last date of different boundary temperature and the cumulative temperature can be calculated. Spline-function is the smooth connection of continuous segments of a polynomial. The quadratic spline-function can be expressed as following: Based on the interpolation condition, connecting condition and boundary condition, the undetermind coefficient a, b,c can be calculated. The recurrence formulas are: On this basis, the annual temperature curve can be simulated, then the date of boundary temperature can be calculated.
%K Spline interpolation
%K Monthly mean temperature
%K Annual tempe-rature curve
%K The date of boundary temperature
%K Cumulative temperature<br>样条函数插值
%K 界限温度
%K 计算
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=869B153A4C6B5B85&jid=F7B5B947C24B9D649491012214E4BEF4&aid=9EEF564B56F3CD68&yid=D418FDC97F7C2EBA&vid=B6DA1AC076E37400&iid=CA4FD0336C81A37A&sid=09ABD5535D9B6D45&eid=67969BA850333433&journal_id=0375-5444&journal_name=地理学报&referenced_num=2&reference_num=1