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极地高压
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  polar high
     THE DYNAMIC ANALYSIS OF THE STABLE POLAR HIGH
     极地高压稳定的动力分析
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     The physical mechanism of the stability of polar high is theoretically discussed in this paper. We have calculated the zonal mean wind component and the mean meridional gradient of potential vortieity, and found out the critical zonal wind component ur.
     # 本文从理论上探讨极地高压稳定的物理机制,计算了纬向平均风速及纬向平均位涡度的经向梯度,找出了临界风速值.
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  “极地高压”译为未确定词的双语例句
     The main conclusions are:1. Geographical position:Most of blocking events in higher latitudes correspond to dipole blocking, and the lifetime is longer;
     分别从总阻塞、孤立子阻塞和偶极子阻塞发生次数和天数的纬度主要分布区和峰值区的地理位置进行比较,分析得出极地高压绝大多数是偶极子型,且生命史较长;
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  相似匹配句对
     THE DYNAMIC ANALYSIS OF THE STABLE POLAR HIGH
     极地高压稳定的动力分析
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     HIGH PRESSURE HEAT EXCHANGER
     高压换热器
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     Audio frequency voltage source
     音频高压电源
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  polar high
It might be caused by the North Atlantic ice age induced by the heat circulation, which strengthened the polar high pressure and Siberian-Mongolian high pressure and further led to the dominance of the winter monsoon over China's desert area.
      
The individual triacylglycerol species containing one, two or three linoleoyl moieties were incompletely recovered using a polar high temperature gas-liquid chromatography (GLC) column.
      
We present 3-D simulations for the cosmic-ray intensity variations in a model with non-polar high speed streams.
      
In the case of a polar high-viscosity liquid, the main mechanisms are shear instability of the structure, responsible for stratification of the medium along the lines of local failure of structural viscosity, and the action of capillary forces.
      
During 1959 the ratio Sr89/Sr90, and and hence the ratio of polar (high latitude) to equatorial Sr90 activity remained substantially independent of latitude.
      
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  polar high pressure
It might be caused by the North Atlantic ice age induced by the heat circulation, which strengthened the polar high pressure and Siberian-Mongolian high pressure and further led to the dominance of the winter monsoon over China's desert area.
      


In the summer half year,the average intensity of the Pacific high pressurechanges more or less abruptly.It strongly increaseses from June to July and de-creases gradually from April to June.In middle September it decreasees suddenly. In.the summer season(from June to August),tha advance and retreat of theWestern Pacific pressure ridge(moving from east to west or reversed)is intimatelycorrelated with teh upper westerlies.At the same time,the Pacific High itselfis an important factor of the atmospheric circulation.When...

In the summer half year,the average intensity of the Pacific high pressurechanges more or less abruptly.It strongly increaseses from June to July and de-creases gradually from April to June.In middle September it decreasees suddenly. In.the summer season(from June to August),tha advance and retreat of theWestern Pacific pressure ridge(moving from east to west or reversed)is intimatelycorrelated with teh upper westerlies.At the same time,the Pacific High itselfis an important factor of the atmospheric circulation.When the zonal circulationis strong,the intensity of the Pacific High is also relatively strong and the posi-tion of the western Pacific pressure ridge changes little.When the small wavesin the westerlies move out from Asia into the Pacific Ocean,the position ofthe western Pacific pressure ridge only vibrates slightly.But,when the waves in thewesternlies are strong,the western Pacific pressure ridge advances westward andthen retreats eastward apparently.The period advance and retreat of the ridgeis about five or six days During the period of fow zonal circulation index, thewestern Pacific pressure ridge moves eastward.when the circulation index growsfrom low to high,the ridge advances westward.The range of longitudes ofoscillation of the ridge in this type is largest,about 30-40 degrees,and the periodof oscillation is longest,about half month in general.The longest period reachesone month. Besides,the movement of the Pacific High ridge is also studied in relationto he tropical systems,such as typhoons.

夏半年太平洋高压的平均变化,带著突变性质的增强和减弱,突然的增强发生6月到7月,而4月至6月更有逐渐减弱的趋向,到9月中旬以後则突然的减退。 夏季西太平洋高压脊的东西进退和整个西风环流变化及西风环流的情况密切关连,同时太平洋高压本身也是西风环流及其变化的重要因素之一。当西风环流强时,太平洋高压比较强大,这时太平洋高压脊的变化很少,在西风环流小波动东移的过程中,太平洋高压脊只有微小的摆动。但西风带波动较大时,随着西风槽和高压脊的东移,太平洋高压脊便有了比较长时期的和明显的东退和西伸,它的周期一般都在5、6天左右。如果西风环流起了大型的变化,即西风环流由强转弱,再由弱转强,太平洋高压脊随之不断的东退和西伸,进退的范围可达30-40经距。它的周期较长,一般都在半个月的光景,最长的可达一个月,10天以内的很少。 太平洋高压脊除了和西风带的环流,极地高压和低压槽有关外,也和它南边的气压系统,如台风和热带风暴有关。

In this paper,by the method of power-spectra analysis,the collapse processesof the mid-winter polar vortex in the Northern Hemisphere are investigated.Itis shown that they are the consequence of interactions between atmosphere circula-tions of higher and middle latitudes.The northward development of long-waveridges of middle latitudes favors the collapsing and southward transport of positiveangular momentum from higher latitudes favors the setting-up of the polar high.

本文利用波谱分析方法,研究了隆冬北半球极地涡旋的崩溃过程,指出极地涡旋的崩溃是中、高纬度环流相互作用的产物。当中纬度地区有长波脊向北发展时,有利于极地涡旋崩溃。当高纬度地区有西风角动量向南输送时,有利于极地高压的建立。

Using a two-layer quasi-geostrophic model with the potential height φ at any specific time expressed as Fourier series, the nonlinear ordinary differential equations are obtained. The evolution of medium-range weather process is investigated. Some effects of the sea-land contrast and the nonlinear interaction between different wave components are considered.It is shown that the zonal circulation is transformed into meridional circulation and the polar anticyclones are created. The transformation of the large-scale...

Using a two-layer quasi-geostrophic model with the potential height φ at any specific time expressed as Fourier series, the nonlinear ordinary differential equations are obtained. The evolution of medium-range weather process is investigated. Some effects of the sea-land contrast and the nonlinear interaction between different wave components are considered.It is shown that the zonal circulation is transformed into meridional circulation and the polar anticyclones are created. The transformation of the large-scale circulation is mainly due to the development of ultra-long waves. Some effects of dynamical and thermodynamical factors are also discussed.

本文用两层准地转模式,初步考虑海陆的差异,不同尺度波动之间的非线性作用,将场用富氏级数展开,得到一组非线性常微分方程组。讨论了中期过程的演变。 得到近于纬向的环流向经向环流转变。极地高压形成等结果。而这类大型过程的转变主要是由于超长波的发展。还讨论了动力、热力因子的作用。

 
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