periodic spring 中文意思是什麼
periodic spring
解釋
周期泉-
( 2 ) summer rainfall of north china exists periodic variation of quasi - three years and six years, and. spring, autumn and winter also exist periodic variation of quasi - three years
（ 2 ）華北地區夏季存在3年左右的主周期及6年左右的次周期，春、秋、冬三季都存在3年左右的主周期。 -
29 representative stations of northwest china are selected using eof analysis, and the detailed results of characteristics are given for temporal and space variation of interarmual change and decadal change. the main conclusions are followed : ( 1 ) the tendency of precipitation in northwest china is positive to the west of 103 e longitude and opposite to the east of it. there is a periodic oscillation of quasi - three years of precipitation and a mutation in the middle of 80s in spring precipitation of northwest china
用eof分析方法選取西北地區29個代表站，分別對其春季和夏季近50a降水進行年際變化和年代際變化時空特徵分析，結果發現（ 1 ）西北地區近50a降水時空趨勢變化以103 e為基準線，以西為正，以東為負，並有準3a的振蕩周期， 80年代中期西北地區春季降水出現了氣候突變。 -
Detailed numerical studies are presented for the transitional dynamics of the steady - state motions of those systems with the variation of the excitation and the system parameters, with the illustrations given for rich nonlinear phenomena, such as the bifurcations of periodic vibro - impact motions and the chaotic vibro - impact motions. in chapter 5, the existence of the periodic vibro - impacts, as well as the corresponding stability is analyzed for an oblique - impact vibrating system composed of a spring - pendulum and an oscillator. when the system damping and the tangential friction
結果表明，在無阻尼、無摩擦的簡化情況下，周期斜碰撞振動運動具有嚴格的存在條件，並隨激勵參數的變化出現復雜的分叉和穩定性的反復切換；運動阻尼可在較大參數范圍內對非穩定運斜碰撞振動系統動力學研究（ 5 ） （ 6 ）動鎮定;相對而言，切向摩擦對系統穩態特徵的影響不大。
分享友人