periodic variation 中文意思是什麼
periodic variation
解釋
周期變化-
The precipitation and temperature both existed 5year periodic variation in the pre - flood period in the south of china
華南前汛期降水和氣溫都有5a的主周期。 -
( 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。 -
The results showed that the whole distribution pattern of winter chilling damage in guangdong had quasi - 8 year periodic variation, and the south - north distribution pattern had quasi - 22 year periodic variation. generally speaking, the periodic variation of winter chilling damage in guangdong had quasi - 8 year mainly oscillation
結果發現，廣東冬季寒害的整體分佈型具有準8年的周期變化；南北分佈型具有準22年的周期變化；綜合而言，廣東冬季寒害具有準8年主要振蕩的周期變化。 -
Northeast china floods season precipitation take place a mutation in 1967. the distribution of northeast china floods season precipitation anomalies shows different phase in different years. ( 3 ) northeast china precipitation anomalies shows complex periodic variation in different seasons and in different years, but all the season exist periodic variation of quasi - three years and over 10 years to different extent
汛期降水異常的空間分佈在不同年代有不同的位相分佈特徵（ 3 ）東北地區降水不同季節不同年代表現出了較為復雜的周期特徵，其中各季都表現出了明顯的準3年振蕩的周期特徵，同時還不同程度存在10年以上的周期。 -
1 in most cases, periodic evaluation of test and control materials is necessary to determine the variation in magnitude and direction of property changes as a function of exposure time or radiant exposure
在大多數情況下，有必要定期評價試驗材料和控制材料，以測定（塗料）屬性改變在大小和方向上的變化.該變化是暴露時間或輻射曝露量的函數 -
As the traditional navigation system ca n ' t satisfy the requirements of the autonomous underwater vehicles ( auv ) navigation and position. we study a depthometer - doppler - aided strapdown inertial navigation system ( ddsins ) in combination of the developments of periodic navigation technique and some practical problem posed by the mathematical and variation of output data of doppler, furthermore, the digital simulation and semiphysica test are made to verify the validity of the algorithm, the main research work are as follows : design of the strapdown inertial navigation system of auv
由於傳統的導航系統很難滿足遠程水下航行器精確導航、定位的要求，本文在充分考慮使用特殊性的情況下，結合國內、外導航技術發展的實際狀況和發展方向，研究了水下航行器組合導航系統的誤差，重點解決了因多普勒輸出數據周期長和周期時變而給導航計算和濾波器設計帶來的問題，並進行了模擬和實物測試，模擬和實物測試結果表明本文所研究的設計方案合理，可以達到某型水下航行器導航、定位需要的精度。 -
The variation of ztd is mainly caused by the zenith wet delay ( zwd ). zenith hydrostatic delay ( zhd ) and zwd from different gps sites exhibit individual features that zhd has a obvious periodic change and zwd is related to weather
總延遲的變化主要是由濕延遲的變化而引起，其中靜力延遲變化呈現了明顯的周期性，而濕延遲的變化與天氣過程相關聯。 -
Through the settling and analysis of these data, we find that the seabed sediments intensity appears heterogeneity on the plain and the profile under the action of wave loading, i. e., the random or periodic variation of seabed soil intensity in the plain, and hard soil layer in certain depth under the bottom
發現在波浪作用下，黃河口沉積物強度出現了非均勻化，即在平面上，沉積物強度呈現隨機性或間隔性變化；在剖面上，海底面之下一定深度范圍有硬層發育。 -
The 40 - 50 years periodic change divides the temperature variation into three main cold and warm vicissitudes of the last 50 years, which include the warm period before mid 1960s, the cold period from later 1960s to 1980s and the warm period after the 1980s ; ( 2 ) the precipitation variations in heilongjiang province have multi - time scale and jump characteristics
近50年來黑龍江省的氣溫變化在40 55a尺度上表現為兩個暖期和一個冷期，它們分別是60年代中期以前的偏暖期， 60年代後期到80年代的偏冷期和80年代以後的偏暖期：黑龍江省的降水變化也具有多時間尺度特徵和突變特徵。 -
The results show that : the whole bit wear process can be divided into three phases ; the regularity of the machining time per hole with the number of holes machined is close to a periodic variation ; higher machining efficiency or working life can be obtained when the drilling pressure and the wall thickness of the bit are advisable
發現鉆頭的整個磨損過程可分為3個階段；孔加工時間隨孔數近似呈周期性變化；鉆壓和鉆頭壁厚適當時，可獲得更高的加工效率或者工具壽命。 -
The periodic variation of ssta of the two key regions combine reflect vary length periodic variation of flood season precipitation anomalies in liaoning areas
兩關鍵區ssta周期特徵反映遼寧汛期降水異常的不同長度周期特徵，且有很好的互補關系。 -
( 3 ) the precipitation anomaly existed 3year. 5year 7year 14year periodic variation in the pre - flood period in the south of china. the temperature anomaly existed 2year 4year 5year 12year 19year periodic variation in the pre - flood period in the south of china
（ 3 ）華南前汛期降水異常存在3a 、 5a 、 7a的年際周期和14a的年代際周期；華南前汛期氣溫異常存在的2a 、 4a 、 5a的年際周期及12a 、 19a的年代際周期。 -
( 2 ) the precipitation shows periodic variation of 2 - 4 years in the four seasons and significant 10 - 12 years periodic variation in summer and flood season. ( 3 ) liaoning flood season precipitation anomalies in phase with huabei and dongbei, jiangnan inverse
在周期上，遼寧四季降水的3年左右振蕩特徵較為一致，夏季和汛期的10 12年周期顯著。遼寧汛期多少雨年同期華北、東北與之同位相，江南與之反位相。 -
The periodic variation in speed of a synchronous motor with respect to the current
（同步電動機的）速度偏差同步電機運行速度的周期性變化 -
In the third chapter, we can obtain the soil temperature field expression under the different depth and the different time through carrying on the analysis of the temperature field of the symmetry semi - infinite big object under the periodic variation boundary condition
在第3章，通過對勻質的半無限大物體周期性變化邊界條件下的溫度場進行分析可以得出在不同深度、不同時刻下的土壤溫度場的表達式。 -
Therefore, we need more concrete function to better discribe the variation of some biological populations in our real world. the two important indexes r ( t ) and k ( t ) of logistic equation are asmptotic periodic function, and discussed by author. the asmptotic solution of the asmptotic periodic logistic function is obtained
因而，為了更好地刻劃客觀世界，我們需要用更加符合客觀實際的函數來描述生物種群的變化，於是作者對logistic方程的兩個重要的參數r （ t ） ， k （ t ）分別是漸近周期函數時，研究漸近周期logistic方程的漸近周期解，並且得到了解的存在性，唯一性，全局吸引性等一些良好的性質 -
In this paper, based on the method of variable replacement, real parameters di > 0 ( i = 1, 2, . ., n ) which can be adjusted, are introduced ingeniously. we establish some new sufficient conditions for the existence, uniqueness and global exponential stability of the equilibrium, periodic solution and almost periodic solution of neural networks with time - varying delays by means of the method of variation of parameters, fixed point theorem and some analysis techniques
本文巧妙地引入可調實參數d _ i 0 （ i = 1 ， 2 ， … ， n ） ，藉助常數變易法、變量替換、不動點定理和一些分析技巧，對具可變時滯的神經網路的平衡點、周期解、概周期解的存在性和全局指數穩定性建立了一些新的充分條件。 -
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。
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