Analyses from singular spectrum and maximum entropy spectrum techniques reveal that summer and autumn precipitation have 10 - year periods , and about 2 . 5 - year oscillations are particularly pronounced for the autumn precipitation 奇異譜分析表明:夏季和秋季降水變化有較明顯的10年周期,秋季降水變化有2 . 5年周期。
Based on the characteristics of information , there are two kinds of consistence test methods : static method and dynamic one . static consistence test method contains rank sum test , mood test , etc . as for the dynamic consistency test methods , the emphasis is focused on spectrum analyses , such as maximum entropy spectrum estimation , etc . in engineering applications , constituting precision evaluation projects of diverse war indexes have been intensively analyzed , all steps of evaluation have been synthetically analyzed and applied to engineering : an integrated evaluation example is provided 驗(yàn)前信息的一致性檢驗(yàn)的優(yōu)劣對(duì)小樣本下試驗(yàn)鑒定的影響是很大的,文中根據(jù)驗(yàn)前信息的特性給出了小樣本靜態(tài)檢驗(yàn)方法和動(dòng)態(tài)檢驗(yàn)方法,靜態(tài)檢驗(yàn)法有秩和檢驗(yàn)、 mood檢驗(yàn)法等,動(dòng)態(tài)檢驗(yàn)中重點(diǎn)對(duì)頻譜檢驗(yàn)法,如對(duì)最大熵譜等作了理論分析。
In this paper , data gathered during 1957 - 1996 were used to study the climatological variability in the northern ecs , through statistical methods such as eof decomposition , correlation analysis , and maximum entropy spectrum analysis . the conclusions were drawn as follows : 1 本文利用1957 1996年?yáng)|海溫鹽的觀測(cè)資料,通過統(tǒng)計(jì)平均、 eof分解、相關(guān)分析、最大熵譜分析等方法,對(duì)東海北部夏、冬季溫鹽年際年代際變化特征及其成因進(jìn)行了初步探討,得到以下結(jié)論: 1
In this paper , the climatic variation features and spatial and temporal distribution of the flood and drought in zhejiang province were analyzed by using 36 monthly and seasonal station data during 1961 - 1999 observed over zhejiang province , 160 rainfall and temperature data during 1951 - 1999 observed over china , northern hemisphere 500mb height data during ! 961 - 1999 , the planting and flood disasters area data in zhejiang province during 1949 - 1998 . we used many method : calculated trend coefficient of rainfall and temperature , used eof , reof , ssa ( singular spectrum analysis ) and mem ( maximum entropy spectrum ) method and synoptic method . we first studied the climatic variation features of summer and autumn and characters of the flood and drought in zhejiang 本文用1961 - 1999年浙江省36個(gè)氣象觀測(cè)站的降水量和氣溫資料、 1951 - 1999年全國(guó)160站的降水量和氣溫資料、 1961 - 1999年500hpa月平均高度資料和1949 - 1999年浙江省11個(gè)地市的受災(zāi)面積、成災(zāi)面積、耕地面積等資料,通過計(jì)算趨勢(shì)系數(shù)、變量場(chǎng)eof分解、旋轉(zhuǎn)eof分解、奇異譜分析和最大熵譜分析等多種統(tǒng)計(jì)學(xué)方法和天氣學(xué)方法,研究了浙江省氣候變化特點(diǎn)及旱澇災(zāi)害時(shí)空分布的特征。