1)  seasonal change
年变形态
2)  annual variation
年变
1.
The influence of daily and annual variation of the surface temperature on near-surface temperature survey;
长春地区地表温度日变、年变对地温测量的影响
3)  "annual fluctuation"
"年变"
4)  variation
多年变化
1.
The variations of nitrogen and phosphorus transportation in the last decades were studied and their relationships with population,applied fertilizers and wastewater discharged in the basin were analyzed.
收集了黄河流域下游主要干流监测站近40a来(氮数据)或20a(磷数据)来的水质数据,同时,收集了流域各省人口、氮肥磷肥施用量(折纯)及工业废水排放量等数据,研究了黄河氮磷营养盐通量(或浓度)的多年变化趋势,并统计了水质变化与流域人口、化肥用量和工业废水排放量等社会经济指标的关系。
2.
The Hydrographic data from three major CHINARE cruises and one Australian cruise along 73°E near Prydz Bay are interpreted to present the features and variations of water masses and geostrophic currents.
根据 2 0 0 2 ,2 0 0 0和 1999年中国南极考察和 1992年澳大利亚南极考察资料 ,分析了普里兹湾 73°E断面水团与地转流的结构及其多年变化 :(1)该断面上水团主要有南极表层水、绕极深层水、南极底层水和陆架水 ;(2 )南极表层水 1999,2 0 0 0年向北扩展最强 ,2 0 0 2年向北扩展最弱 ,绕极深层水 2 0 0 2年向南扩展也较强 ,1999和 1992年绕极深层水向南扩展较弱 ,南极底层水 ,位温在 - 0 。
5)  annual variation
周年变化
1.
Analyses indicate that although dominated by the seasonal reversing Indian monsoon,yet annual variation of the BOB surface circulation could be divided into three stages with distinctive patterns.
应用1993~2003年TOPEX/Poseidon卫星测高数据结合历史水文资料,反演了孟加拉湾海面动力地形的平均周年变化,探讨了孟加拉湾上层环流季节特征和演变规律。
2.
The study on annual variation of community structure of zooplankton (Copepoda, Cladocera, Rotifer) and the correlation between ecological factors and zooplankton was conducted in Lake Taihu in Jiangsu province from Oct.
本文研究了江苏太湖浮游动物(桡足类、枝角类、轮虫)群落结构的周年变化以及与生态因子的相关关系。
3.
The study on annual variation of community structure of zooplankton and the correlation between ecological factors and zooplankton was conducted in Yeyahu in Beiji.
本文研究了北京野鸭湖浮游动物群落结构的周年变化以及与生态因子的相互关系。
6)  Annual variation
年变化
1.
Thermal stresses of concrete gravity dam in the period of operation caused by annual variations of air and water temperatures;
重力坝运行期年变化温度场引起的应力
2.
There are two valleys in the annual variation of net photosynthetic rate (Pn) of tea, which appeared in January and April, respectively (Pn was 2.
茶树光合年变化受生理生态因子的影响,特别是主导因子的影响。
3.
The results show that even if the amplitude of the annual variation meets the construction standard of seismic station issued by China Earthquake Administration (the annual temperature variation amplitude in the tunnel is no more than 0.
利用轴对称线弹性模型有限元方法,计算了洞室中温度微小年变化引起的地倾斜和地应变。
参考词条
补充资料:变分原理(复变函数论中的)


变分原理(复变函数论中的)
omplex function theory) variational principles (in

  f日In}F(O(只,t),0)l}乙+:d乙=】nll,—}——,厂:’、一几t)〔.匕,日亡卜OC一“C’日当r,0时下*(:、,t)/:在B*的紧子集上一致地趋于0(k一1,2).该结果已被推广到二连通区域(13」).若加以进一步的限制,就能得到映射函数在B、(t)内关于表征所考虑区域边界形变的参数的展开式余项的估计式(在闭区域内一致)(【4」).份卜注】存在大量的变分原理,见【A3}第10章.亦可见变分参数法(variation一parametrie nlethod);肠”ner方法(幼wner Tnetl〕ed);内变分方法(internalvariations,服t】1‘对of). 还可见边界变分方法(boundary variations,me-tll‘xlof).M.schiffer对单叶函数的变分方法做出了重要的贡献,见〔A3」第10章.变分原理(复变函数论中的)Ivaria石0“目州址妙es(加e网Plex五叮‘6佣山印ry);。即“a双“OHH从e nP一”u“nHI 显示在平面区域的某些形变过程中那些支配映射函数变分的法则的断语. 主要的定性变分原理是ljxlelbf原理(Linde场fpnnciPle),可描述如下.设B*是z*平面上边界点多于一点的单连通区域,06B*,k=1,2;设二(;,B*)是对于B*的Green函数的阶层曲线,即圆盘王心川C!<1}到B*而使原点保持不变的单叶共形映上映射下圆周C(r)二{乙:{心}二;}的象,o<;<1.进而设函数f(:,)实现B,到B:的共形单射,f(0)‘O,在这些假定下有:l)对于L(:,B,)上任一点:?,存在位于阶层曲线L(:,BZ)上(这仅当f(B,)二BZ才有可能)或其内部的一点与之对应;及2){f’(0)1蕊}夕‘(0)},其中g(:,)满足g(0)二o是Bl到 BZ的单叶共形映射(等号仅当f(B1)=B:时成立).Lindebf原理系从Rien坦nn映射定理(见Rle-n.lln定理(Rierl飞幻In theorem))与Sdlwarz引理(Schwarz lemrr必)推出.相当精细的构造使之能够求出由被映射区域的给定形变所引起的映射函数的逐点偏差. 定量的基本变分原理系由M.A.几aBpeHTbeB(〔1」)获得(亦可见【2]),可叙述如下,设B:是具有解析边界的单连通区域,0任B!.假定存在给定区域族B,(r),0‘Bl(r),0(t蕊T,T>O,B;(0)二B,,具有JOrdan边界rl(t)={:一z,=0(之,t)},0(又续2兀,0(0,t)二Q(2二,r),其中Q(又,r)关于t在t二O可微且对又是一致的;设F(::,t),F(0,t)=0,F:.(0,t)>O,是把B,(t)单叶共形映射为BZ二{22:I:21  
说明:补充资料仅用于学习参考,请勿用于其它任何用途。