查询词典 convection current

It is shown that under certain condition the convection may also develop in a stable stratified atmosphere, because the ambient wind field and stratification variate with the development.

分析结果指出，对流除在不稳定和中性稳定层结条件下可以发展外，在稳定层结条件下也可以得到发展，并且扰动的振幅最后均趋于有限值。

The method is firstly applied to solve the linear convection-dominated diffusion problems and the optimal L2-error estimates of the unknown function c and the vector flux p are gained.

此方法首先被用于求解线性对流扩散问题，得到了关于未知函数c及伴随函数p的最优L~2误差估计。

By solving this equation the optimal velocity field has been obtained, which leads to the best heat transfer efficiency in convection.

1引言 对流换热过程的整体性能取决于速度场和温度场的分布特性，改变速度场是强化对流换热的一个最直接的途径。

In this paper a two-dimension square model of convection heat transfer is adopted and Field Coordination Equation is verified by comparing the heat transfer efficiency of optimal velocity filed and other flow fields.

过增元11，2指出速度矢量与热流之间的夹角是影响对流换热整体性能的一个重要因素，并阐述了对流换热场协同的基本概念：对流换热强化要求速度场和温度场之间相互协同，即彼此存在着最为合理的空间分布。

The concept of mantle convection potential field is introduced to calculate stress field as easily as calculating vertical deflection.

引入地幔流位场概念，使地幔流应力场推算与垂线偏差计算获得统一而简化。

The result of numerical simulation by MM5 model shows that convection takes place on shear line, vortex and θe front .

中尺度数值模式(MM5)模拟结果表明强对流运动发生在对流层中低层切变线、气旋和南北向等θ_e，线密集带。

The observatory said the relatively strong localized convection led to the formation of the waterspout.

天文台表示，是相对强烈的地区性对流活动，导致了此次水龙卷的形成。

In the initial stage, the convergence of the low layer was stronger than that of the upper layer of the boundary layer, and the rotation of the boundary layer flow was weak, so a convergence line of the boundary layer was one of important factors to trigger convection.

MCS初期边界层低层的辐合强于边界层高层辐合，边界层气流旋转作用较弱，边界层辐合线是对流触发的重要因素之一。

In this paper the model of the thermal conduction between the wellhole and the formation was developed after considering the effects of the heat conduction and the heat convection on the basis of the law of conservation of energy, then the temperature distribution varied with the depth of the interior and the exterior of the drilling pipe was calculated during the gas drilling, which provides the accurate basic data for exact calculation of the temperature distribution of the wellhole.

本文根据能量守恒定律，考虑热传导、热对流的影响，建立了井筒和地层之间的热传递模型，计算了气体钻井过程中管柱内外沿井深的温度分布，为气体钻井计算井筒压力分布提供了准确的基础数据。

Central heating cover breaks way of traditional reseau type, use air convection principle scientificly, just stay respectively in fluctuation have wind gap, use interior atmosphere, make air conditioning from lower part by mandatory input, and upper part comes loose hot mouth can sufficient send out quantity of heat completely quickly to whole space.

暖气罩打破传统网格式做法，科学地利用空气对流原理，在上下方分别留有风口，利用室内大气压，使冷气从下方被强制性输入，而上方散热口又能充分迅速把热量完全散发给整个空间。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。