divergence of field 中文意思是什麼

divergence of field 解釋
場的散度
  • divergence : n. 1. 分歧，分岔，分出 （opp. convergence）。2. 【生物學】趨異 （opp. convergence）; 【心理學】離散；【數、物】散度，開度；發散。3. 離題。
  • of : OF ＝Old French 古法語。
  • field : n 菲爾德〈姓氏〉。n 1 原野，曠野；（海、空、冰雪等的）茫茫一片。2 田地，牧場；割草場；〈pl 〉〈集...
  1. Therefore, to measure exactly the far - field divergence angle of laser beams is highly important

    因此，對發散角測量的研究成為當今半導體激光技術發展的一個重要課題。
  2. As the extensive application of the semiconductor laser diode ( ld ), it become more and more important to evaluate the quantity of laser beam. far - field divergence angle of laser beams is an important parameter about value of laser quality. not only the laser divergence peculiarity in the distance is reflected, but also quality of the correlative laser apparatus and the laser transmission is exactly known

    隨著半導體激光器日益廣泛的應用，對激光光束質量的評價越來越重要，而激光光束遠場發散角是評價激光質量的一個重要參數，它不但能反映遠距離傳輸時的激光發散特性，而且能準確評估出半導體激光器的品質及激光的傳輸質量。
  3. The study showed that n and p runoff concentrate in storm is higher that norm. with the cover level increasing and different utilization manners, losses of n and p nutrient showed notable divergence. ( 2 ) with the increasing of rainfall and rainfall intensity, losses amounts of runoff silt in fallow field, com field and orchard field showed rising, while was stable in grass field

    黑土徑流泥沙流失量，總的趨勢是隨降雨量、降雨強度增加，休閑地、玉米地、果園的流失量有增加的趨勢，而草地泥沙流失量無增加的趨勢，基本衡定；徑流泥沙流失量及泥沙n 、 p流失隨植被覆蓋的增加而降低。
  4. Q vector divergence field submit piece form district of convergence and divergence, have reflected meso - scale character. in the interface of convergence district and divergence district of q vector divergence, accompany severe convection precipitation and convection precipitation strengthen following convergence center strength, weaken following divergence center weaken

    在對流層低層q矢量散度輻合區和輻散區的交界處，伴隨有較大的對流性降水，對流性降水的強度隨輻合中心強度的增強而增強，隨輻合中心強度的減弱而減弱。
  5. Using monthly mean rainfall and temperature data in north - west of china ( nwc ), the characteristics of rainfall anomaly at rainy season in nwc and the inter - annual varieties of drought / flood are diagnosed by means of eof, reof and wavelet analysis et al. and the ncep / ncar monthly reanalyzed data are employed to analyse the evolution character of water vapor flux and it ' s divergence flux, 500hpa height and u, v wind field. results show that ( a ) the space distribution of rainfall anomaly can be separated into seven climate sensitive areas, the first and the third region have the same rought / flood trend

    本文使用西北（區） 168個站1961 2000年6 9月（主汛期）月平均降水、溫度資料，運用eof 、 reof 、小波分析等方法診斷了主汛期月降水異常和旱澇的年代際變化；同時利用ncep ncar月平均資料，分析了強（弱）季風年西北空中水汽通量及其散度場、 500hpa高度場、 u 、 v風場的演變特徵，結果表明： （ a ）西北汛期降水可分為七個氣候異常區，第一、三異常區旱澇趨勢相同。
  6. Special analysis is made to see the impact of different boundary layer parameterization schemes on some factors which affect the heavy rainfall such as vertical velocity, divergence, vorticity, divergence of water vapor flux, se field and so on

    結果表明：復雜地形條件下，特別是降水有明顯日變化的地區，邊界層的作用是十分重要的，這在暴雨時的緯向垂直環流結構中表現地非常明顯。
  7. There are two parts in this paper : firstly, a set of single doppler velocity models are presented for typical ambient windfields that include those of being uniform horizontally, macroscale convergence and divergence, which overlap warm and cold advection. which are marked by different signatures in the single doppler velocity field. the models proposed can help users identify useful information from the dopple velocity patterns

    本論文包括兩個部分：第一篇通過對典型風場的單多普勒天氣雷達徑向速度圖象進行模擬，典型風場包括水平均勻一致的風場、非均勻水平風場的大尺度運動的輻合輻散風場以及大尺度運動的輻合輻散風場與冷暖平流的迭加等。
  8. The general form of dyadic green ' s function of non - divergence electromagnetic field in chiral media was deduced by moment method, and the expression forms of the m and n vector wave functions for dyadic green ' s function of non - divergence electromagnetic field was also presented

    摘要應用矩量法導出了旋波媒質中無散電磁場並矢格林函數的普遍形式，然後給出無散電磁場並矢格林函數的m和n類矢量波函數的表示形式。
  9. The frequently used parameters such as the power in bucket ( pib ), the beam width, the curvature radius, the far field divergence, the m2 - factor, the rayleigh length and the kurtosis are calculated in term of the intensity moments

    第二章用強度矩的方法研究了hchg光束，研究了hchg光束的pib系數、陡峭度在傳輸過程中的變化以及偏心系數b和厄米多項式階數m對光束質量的影響。
  10. The tuning curve of type - i phase matching of bbo opo are measured with accuracy ; the maximum conversation in total of the system is about 31 % at 615. 6 nm, and it is fitted well with the gtp formula ; in the end we compared the output linewidth and unstable cavity far field beam qua lity of the bbo opo under the condition of type - i phase matching and type - ii phase matching, it is proved that we can obtain the parametric output of linewidth less than 0. 3 nm and the beam divergence angle approaching diffraction limits by take the advantages of type - ii phase matching and unstable cavity designs

    測量了該系統的轉換效率最大為31 ，並能與理論公式極好地吻合，最後比較了在類相位匹配條件下和類相位匹配條件下的bbo - opo的輸出線寬，以及非穩腔的遠場光束質量，實驗結果表明，利用類相位匹配以及非摘要穩腔設計可以獲得線寬小於0 3nlm 、光束發散角接近衍射極限的參量光輸出。
  11. For a long period of time, divergence exists in our theoretical and practical field, upon the nature and function of investigation power and prosecutorial power in criminal procedure

    普遍建立司法審查制度，具體表現為通過令狀實現審判權對偵控權的科學干預，防止偵控行為對個人合法權利的侵害。
  12. In the first part of paper, we introduce the appliance of doppler weather radar in meteorological work in the near future, and simply enumerate all kinds of adjoint methods to retrieve data of radar. in the second part of paper, we choice some methods that are usually used domestically and overseas, compare excellence and flaw of the methods by using data of simulate wind field, analyze synthetically the precision of simulate result, the length of retrieval time and the structure of data distributing, lastly decide to regard ameliorated quasi - 4d adjoint method as retrieval technology in the paper. in the third part of paper, we retrieve the data of single doppler weather radar in hefei, anhui province, then calculate 3d wind field, streamline field, divergence, vorticity, helicity, moisture flux, divergence of moisture flux and potential vorticity from the result of retrieval

    文中第一部分對近年來多普勒天氣雷達在氣象工作中的應用作了介紹，同時簡單的羅列了反演雷達資料的各種變分方法；接下來在第二部分選取了幾種國內外常用的反演方法，利用模擬的風場資料比較各種方法的優缺點，從模擬結果的精度、反演時間的長短、資料的分佈結構上綜合分析，最後決定將已做改進的準四維變分分析方法作為本文的反演工具；第三部分就是反演安徽合肥多普勒天氣雷達資料，然後由反演得出的風場計算了各個時間各個層次的三維風速、流場、散度、渦度、螺旋度、水汽通量、水汽通量散度和位渦。
  13. The paper makes use of doppler radar data to mesoscale numerical model, through adjusting divergence fie ld, vertic al velo city fie id etc. to improve on initial field. the investigation results show that there is a improvement in the forecasting effects, precipitation position is closer to practicality

    試驗結果表明，在中尺度數值模式中利用多普勒雷達觀測資料，對初始場進行修正，通過散度和垂直速度場等的調整，有效提高預報效果，使得雨區范圍和雨量更接近實況。
  14. We also analyzed the elements of vorticity, divergence, specific humidity, moisture flux divergence, wind - field, wind shear, maximum lifting speed and so on in the snow - storm of north - east china, found that they are favorable for and benefited to the formation and development of snow - storm

    對2000年1月同一天不同時刻發生在西北和東北的一場暴雪過程進行了對比分析，發現兩地暴雪雖發生在同樣的大尺度環流背景下，但卻在很多方面有不同之處。
  15. The results show that the " 8. 11 " rainstorm had significant mesoscale character. ascending motion, divergence and vorticity field intensified rapidly in the narrow area of rainstorm

    11 」暴雨過程的常用物理量場的分析表明：這次暴雨過程的中尺度特徵非常明顯，在解析度較低的大尺度場上很難分析出其物理量場的迅速變化。
  16. The assimilation experimentation results indicate that after assimilating radar wind field of small spatial scale, mesoscale and small - scale precipitation prediction can be improved and mesoscale and small - scale information which ca n ' t appear by tradition datum can be gained, which is valuable to analyze the mesoscale and small - scale system structure ; the effect assimilating radar humidity field is n ' t obvious, which is perhaps correlation with precipitation types and assimilating time. the results also show that adding radar humidity field to initial condition at initial time can supply the gap of the regular data in reflecting the mesoscale and small - scale systems, strengthen the humidity in the initial field, and eventually help to improve precipitation. the experiment of assimilating radar wind field and radar humility field at the same time shows that vapor transportation and local vapor divergence play more significant role in causing excessively heavy rain than only high wet center

    同化試驗結果表明：同化空間解析度很高的雷達風場后，能改善中小尺度降水的預報效果，並且能夠得到常規觀測資料所不能得到的中小尺度信息，對分析中小尺度系統結構具有重要意義；同化雷達濕度場效果不明顯，可能與降水類型和同化時刻有關；而直接在初始時刻加入雷達濕度場，補充了常規資料在反映中小尺度系統方面的不足，增強了初始場中的水汽，有利於降水量的增加；同時同化雷達風場和雷達濕度場的試驗表明，水汽的輸送和局地的水汽輻合對于產生特大暴雨的貢獻遠大於僅有高濕中心的貢獻。
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