The weibull and gumbel distributions are used to fit the asymptotic distribution of the yearly minimum surface temperature between 1951 and 1996 in chongqing district 摘要利用重慶1951 - 1996年間46年地面氣溫年極小值的記錄,采用韋伯分布和耿貝爾分布分別進(jìn)行擬合試驗(yàn)。
Evaporation : two u . s . weather bureau class a pans are operated at king s park . the mean water temperature is taken to be the mean of the daily maximum and minimum surface water temperature 蒸發(fā):天文臺(tái)使用兩個(gè)美國(guó)氣象局甲級(jí)蒸發(fā)皿于京士柏氣象站量度蒸發(fā)量,以皿內(nèi)每日量得的最高及最低水面溫度之平均數(shù)作為當(dāng)日的平均水溫。
In order to find the minimum surface of membrane structures , firstly the nonlinear finite element method is adopted to get approximate surface , then the dynamic relaxation method is used on the approximate surface to get an accuracy surface 本文將動(dòng)力松弛法和非線性有限元法合為一體,提出了全新的綜合設(shè)計(jì)法。此種方法比非線性有限元格式的精度有所提高,收斂速度也比動(dòng)力松弛格式快得多。