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对流速度
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  convection speed
     An alternating group explicit iteration method of high accuracy is constructed for solving Burgers equation on the basis of physical sense of convection speed,and its stability and convergence are analysed by the linear method. Numeical results of the model problem are given.
     从对流速度的物理意义出发,构造出求解Burgers方程的高精度交替分组显式迭代方法,并用线性化方法分析了其稳定性和收敛性,给出模型问题的数值结果。
短句来源
  convection velocity
     Na2CO3 particles were utilized to trace the thermocapillary convection of Li2B4O7+ KNbO3 melt in a loop--like crucible. The thermocapillary convection velocity field beside the crucible inner edge was experimentally measured.
     利用示踪粒子获得直径为2mm的环状铂金坩埚内Li2B4O7+KNbO3熔体近坩埚区域的表面张力对流速度场;
短句来源
     The results indicate that the scale-dependent SABT can improve the precision of wavefront reconstruction than single convection velocity SABT.
     结果表明:相对于单一对流速度的小孔径光束波前重构算法,该尺度相关的波前重构算法能有效地提高波前重构的精度。
短句来源
     The temperature,volumetric water content and water table evaporation strength in varied air convection velocity are obtained by experimental measurement and numerical simulation.
     通过实验测量和数值计算,获得了不同大气对流速度作用下土壤中温度、含水率分布以及水分蒸发强度的变化。
短句来源
     It is shown that there exists an obvious anomaly in the overburden over a fault,and its distribution is affected by the thickness of the overburden,the width of the fault,the diffusion coefficient of radon,and the convection velocity of radon.
     结果表明,断层上方第四系覆盖层中存在明显的氡浓度异常,其分布与覆盖层的厚度、断层的宽度、氡的扩散系数和对流速度等因素有关。
短句来源
     In the diffusion dominated case, the solution is similar in form to the diffusion of a source moving with the convection velocity and is modified by another convection term, which can be expanded into a power series of the convection parameter with coefficients composed of the generalized hypergeometric function series of the diffusion parameter.
     在扩散为主导的情况下,解在形式上类似于以对流速度运动的源的扩散,另一对流修正项可按对流参数的幂级数展开,其系数是扩散参数的广义超几何函数组成的级数.
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  convective velocity
     6.The influencing factors on drying characteristic of paddy such as radiant intensity, mediatemperature, material initial moisture content, convective velocity, radiation distance and material layer thickness.
     6.本文在所研制的红外辐射和对流干燥试验台上,对水稻进行干燥试验研究。 分析了辐射强度、对流介质温度、物料的初始含水率、对流速度、辐照距离、物料的装载厚度等参数对干燥性能的影响;
短句来源
     Studies results indicate that the radiant intensity, material initial moisture content , radiation distance and material layer thickness have strongly effect on the drying characteristic of paddy and convective velocity not only has a certain effect on drying characteristic of paddy but restraining high surface temperature media temperature material initial moisture content has no effect on the drying characteristic of paddy.
     证明了辐射强度、初始水分、辐照距离、物料的装载厚度对水稻的干燥性能有显著的影响,对流速度对水稻的脱水抑制表面温度过高有一定作用,对流介质温度对水稻的干燥性能没有显著影响影响。
短句来源
     In convective boundary layer, parameterization of atmospheric turbulence diffu~ sion depends on W*, scale of convective velocity and zi,height of mixing layer.
     对流边界层中,大气湍流扩散参数化将依赖于对流速度尺度W和混合层高度Zi。
短句来源
     The inversed difference of the density is -30 kg/m3. We also discuss the dynamic effect caused by the mantle plume in the convective state and compute the convective velocity and the shear stress which are 4.8-48 cm/a and 11-110 MPa respectively. This force plays an important role in the construction of the lithospheric stress field in middle and west China and the uplift of the Tibetan Plateau.
     另外,还讨论了在对流状态下该地幔热柱引起的动力效应,计算出对流速度和剪切力分别为4.8-48cm/a和11-110MPa,该力对我国岩石层应力场的构成和青藏高原的隆起有重要影响.
短句来源
     There exist the basic patterns that low-pressure convergence leads to uplifted motion and high-pressure divergence leads to down-flow in the atmospheric vortex motions. These basic states of 3-D velocity field can be described in terms of stream function and convective velocity potential decompositions, and there are spiral structures in theses motions.
     大气涡旋运动存在低压辐合上升和高压辐散下沉的基本状况 ,基本态的三维速度场可以用流函数和对流速度势分解 ,且具有螺旋结构 .
短句来源
  “对流速度”译为未确定词的双语例句
     According to the theory of flow diffusion and convection, three dimensional state equation of radon field is established for constant and variable diffusion coefficient and convection rate.
     根据流体场的扩散理论和对流理论 ,建立了扩散系数与对流速度为常量或变量情况下的氡气场三维状态方程 ;
短句来源
     Basic results are presented as follows:1) the reclaimed section or the "heat island" has noon intencity of 4-6℃, the surface disturbance can be felt at 700 m AGL and convective perturbance at the PBL top, with the convective speed of 1-2 cm/s;
     其基本结果是:1)正午开垦地的“热岛”强度达4—6℃。 下垫面的热力扰动可达700m高度,而对流扰动可达行星边界层顶,对流速度为1-2cm·s~(-1);
短句来源
     The measured signals were multi-scale decomposed by wavelet analysis and the scale-dependent convection velocities are computed with correlation method,then the scale-dependent convection velocities are used to reconstruct the wavefronts.
     用小波分析提取了上、下游探测光束输出的不同尺度的光程信号,通过计算两个探测光束输出的同一尺度信号的互相关系数,并利用互相关系数达到最大值对应的延迟时间研究了尺度相关的对流速度,然后再进行尺度相关的小孔径光束波前重构。
短句来源
     Wavefront reconstruction arithmetic based on multi-convection velocity
     基于多对流速度的波前重构算法研究
短句来源
     VELOCITY FIELD OF THERMOCAPILLARY CONVECTION IN LIQUID BRIDGE OF HALF FLOATING ZONE
     半浮区液桥热毛细对流速度场特征
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  convection speed
The feedback mechanism and the hydrodynamic instability theorem are proposed to predict correctly the frequency jump position, wave number and the convection speed of the self-sustained oscillating flow for different jet exit velocities.
      
The convection speed abruptly falls to zero at critical Richardson number.
      
Here Uc is the convection speed of the unstable shear layers between two tandem cylinders.
      
The convection speed was low (100/150 m/s) when Bz was northward but increased to 500 m/s after Bz turned southward on January 20.
      
For the first half of its lifetime in the radar field of view the phase speed of the PIF is highly variable and the mean speed is nearly twice the ionospheric convection speed.
      
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  convection velocity
It is noted that the rate of ascent of the thermal inhomogeneity is much higher than the free convection velocity.
      
The most likely origin of this modulation is modulation of the current flowing along a closed coronal magnetic loop due to the five-minute oscillations of the photospheric-convection velocity.
      
The model Navier-Stokes equation is derived with nonlinear "viscosity" v ∝ U0/T and convection velocity vf ∝ (1 - U0/T).
      
Arcs that appeared after the northward turning of the IMF vertical component drifted poleward at a velocity close to the convection velocity.
      
Free convection velocity profiles are obtained for the asthenosphere beneath a mid-ocean ridge (MOR) with a mobile lithosphere.
      
更多          
  convective velocity
The convective velocity components vz' (r, z), vr' (r, z) and the temperature T are determined as functions of the cylindrical coordinates.
      
In fact, the convection can be correctly represented by the Eulerian mean of the Lagrangian residual velocity, as the convective velocity in the longer-term transport equation is nothing but the mass-transport velocity.
      
Estimates of the maximum possible conductive heat loss from the core to the mantle and the mean radial component of the convective velocity are presented.
      
Simulating the Kinematic Dynamo Forced by Heteroclinic Convective Velocity Fields
      
The convective velocity of the second Mach wave source is higher than the first and thus its Mach angle of radiation is higher.
      
更多          


Physical processes of the propagation of the solar cosmic rays in the interplanetary space include the diffusion in interplanetary disordered magnetic fields and the convection in solar winds. Dimensional method can be applied to solve those equations convertible into Bessel equation, the results obtained are identical with those solved by the commonly used separate variable method. In order to derive an analytic solution to the diffusion convection equation in an unbounded, uniform medium, two dimensionless...

Physical processes of the propagation of the solar cosmic rays in the interplanetary space include the diffusion in interplanetary disordered magnetic fields and the convection in solar winds. Dimensional method can be applied to solve those equations convertible into Bessel equation, the results obtained are identical with those solved by the commonly used separate variable method. In order to derive an analytic solution to the diffusion convection equation in an unbounded, uniform medium, two dimensionless parameters reflecting the diffusion and convection characteristics of the particles are introduced. In the diffusion dominated case, the solution is similar in form to the diffusion of a source moving with the convection velocity and is modified by another convection term, which can be expanded into a power series of the convection parameter with coefficients composed of the generalized hypergeometric function series of the diffusion parameter. This solution has a clear physical meaning, and can suitably be used in the discussion of the rise phase characteristics of the solar cosmic rays from medium to high energies (E_p≥10~1 MeV).

太阳宇宙线在行星际空间的传播,包括行星际不规则磁场中的扩散和太阳风对流这两种物理过程.应用量纲分析法可以解出现有许多能化为贝塞尔函数的方程,得到与常用分离变量法完全相同的结果.为了求出均匀无限介质中扩散对流方程的解,我们引入反映粒子扩散和对流特征的无量纲参数.在扩散为主导的情况下,解在形式上类似于以对流速度运动的源的扩散,另一对流修正项可按对流参数的幂级数展开,其系数是扩散参数的广义超几何函数组成的级数.这种解的物理概念清楚,适用于讨论中等能量(E_p≥10~1Mev)以上太阳宇宙线上升期特性.

Distributions of temperature and velocities of natural convection in vertical rectangular slot have been obtained by numerical analysis. According to the curves of local and average heat transfer coefficients, the effect of Rayleigh number and aspect ratio was studied. The numerical results indicate that the aspect ratio between 3-20 has a substantial effect on average Nusselt number.Computed values compare favorably with available experimental results.

本文用数值分析方法求解了垂直平壁封闭空腔中自然对流的速度和温度分布。在对局部和平均换热系数分析的基础上,整理了瑞利数Ra._L和高宽比H/L对平均换热系数的影响。结果表明,高宽比为3~20范围内对平均努赛数(?)u._L有着明显的影响。计算数据与已有的经验公式作了比较,结果是满意的。

The data observed by EISCAT are used to study the effect of the magnetosphere-ionosphere coupling on the high latitude ionosphere.A case shows that during magnetic storm,even on long summer days,the influence of the magnet ospheric processes on the morphology of the high latitude ionosphere is quite important in comparison with that of the ionization of the solar extreme ultreviolet radiation.The electron density at E-layer significantly increases due to the precipitation of energetic particles from the magnetosphere,while...

The data observed by EISCAT are used to study the effect of the magnetosphere-ionosphere coupling on the high latitude ionosphere.A case shows that during magnetic storm,even on long summer days,the influence of the magnet ospheric processes on the morphology of the high latitude ionosphere is quite important in comparison with that of the ionization of the solar extreme ultreviolet radiation.The electron density at E-layer significantly increases due to the precipitation of energetic particles from the magnetosphere,while the enhancement of the mag-netospheric convection velocity may accelarate recombination of ionization components with neutral atmosphere and cause the nc decreasing at the F-layer altitude.So,usually,ne(E-layer)> ne(F-layer) during magnetic disturbed period.The morphology is not only entirely changed from the quiet period,but also much different in comparison with that at middle and low latitudes.

本文利用EISCAT雷达资料讨论磁层-电离层耦合的高纬电离层效应。研究表明,即使在夏季极昼情况下,磁扰期间的磁层过程对高纬电离层形态的影响也远大于太阳紫外辐射的作用。高能粒子沉降使电离层E层的电子密度大大增加;而磁层对流速度变大会使F层内电离复合加强。因而,磁扰时经常出现n_e(E层)>n_e(F层)的情况。此现象不仅与宁静时完全相反,而且与中低纬电离层形态变化也有很大差别。

 
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