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通过湿空气相对位涡方程的诊断分析，得到平流项、斜压项和次网格尺度的质量通量辐合项是影响局地位涡变化的主要项。

By diagnostic analysis of the relative potential vorticity equation for moist air it is found that the advection term and the baroclinic term and the subgrid scale mass flux convergence term are principal terms effecting the local change of potential vorticity .

利用p-σ区域气候模式的数值试验结果表明，次网格地形热力效应参数化方案的引入，对东亚地区夏季气候尤其是降水的模拟有明显的改进。

Numerical experiment results by using % p - σ % regional climate model show that the parameterization scheme of subgrid topographic slope and orientation can improve the simulation of 500 hPa geopotential height and especially the summer rainfall over East Asia . Numerical experiment was presented .

摩擦消耗和次网格尺度效应以及计算误差R在沙尘暴天气过程中总体表现为能源项。

The friction depletion and sub - grid scale effect are the first energy source at total stage .

并给出了基于二次网格搜索方法的核参数选取方法，找出了多项式核函数，RBF核函数以及Sigmoid核函数的最佳参数，从中确定了SVM的最优核函数及其参数。

Then we propose the method of second gridding searching to get best kernel parameters . Using this method , we get best parameters of poly kernel function , RBF kernel function and Sigmoid kernel function .

分析还发现，MM5模式的GR、KF及BM方案的次网格降水对总降水的贡献率随分辨率的提高而减小，而KU方案的情况则呈现出不合理的缓慢增加态势。

It was found that the contribution of the sub grid scale precipitation to the total by KU scheme is higher than that by its three counterparts , and has an unreasonable trend of increasing with the model resolution , which is opposite from GR , KF and BM schemes .

这种环流的存在直接影响到次网格地表通量的计算。

This kind of circulation directly influences the sub-grid surface fluxes .

在一个基于次网格尺度过程参数化的模式中，这部分能量在表面上看来就是外来的。

In a model where the sub-grid scale parameterization is specified this energy appears as external .

次网格地形坡度坡向参数化及其对区域气候模拟的影响

Parameterization of Subgrid Topographic Slope and Orientation in Numerical Model and Its Effect on Regional Climate Simulation

次网格非均匀性对模式潜热计算产生的计算影响特征和感热相同。

The latent heat parameterization based on bulk transfer scheme has the same characteristics about the heterogeneity influence .

次网格地表非均匀分布，尤其是大尺度模式中的次网格非均匀分布，必将影响地表通量的计算。

Sub-grid surface heterogeneity , especially that in large-scale atmospheric model , has important impact on calculation of surface fluxes .

本文用三维有限差分法，在计算电导率异常的电磁响应时作了一次网格收敛试验。

We present a mesh convergence test of the 3-D finite difference method for computing the electromagnetic response of a buried conductivity anomaly .

对区域感热通量的计算而言，由于地表温度和整体输送系数产生一个正的次网格通量项，它主要由网格平均粗糙度和参考高度平均风速所决定。

For parameterization of the sensible heat , the positively correlation between surface temperature and bulk transfer coefficient lead to a positive additional sub-scale flux .

地面气象要素的次网格分布是产生区域通量计算误差的主要原因之一。

One of the primary reason that caused the grid-scale flux deviation between model results and reality is the nonhomogeneous distribution of the land surface meteorology parameters .

为改进陆面过程的参数化，初步探讨了模式中陆面气象要素次网格尺度不均匀性分布对模拟计算结果的影响。

To improve the parameterization of land surface processes , a preliminary analysis of the impact of subgrid land surface heterogeneity on model results is carried out .

研究表明，云凝结量的次网格水平分布对地面接收的短波辐射和大气顶出射长波辐射通量有明显影响，但短波辐射和长波辐射对云结构的敏感区域有所不同。

Results show that sub-grid distribution of cloud condensate has obvious effect on downwelling shortwave radiation and out-going longwave radiation , with different sensitive domains from each other .

假设自由对流高度为云底高度，考虑模式模拟次网格尺度降雨的云下拖曳清除作用。

Supposing that the level of free convection is equal to the cloud bottom level , we considered the pulling effects of simulated sub-grid scale precipitation , which is under clouds .

给定天气背景的高度和温度场后，考虑地表摩擦、非绝热强迫及次网格扩散等过程，在温度场中对稳定状态下的水平动量和表面温度方程进行积分，即可诊断地面风场。

Under the consideration of surface friction , diabatic forced subgrid-scale mixing , the horizontal momentum equation and surface temperature equation are integrated in a temperature field at specified synoptic-scale height .

文中从地表水分平衡的物理机制出发，引进降水概率统计分布理论，推导出一种由降水气候强迫形成的次网格尺度非均匀径流率计算方法。

A calculation method of subgrid scale runoff ratio over the heterogeneous surface is derived using the distribution theory of probability statistics on the basis of physics mechanism of water balance over land surface .

网格尺度的垂直输送使动能由对流层中、低层向高层输送，但次网格尺度过程使动能下传。

It is also observed that a certain amount of kinetic energy is transported upwards from middle and lower layers to the upper troposphere by resolvable scale vertical motion and downwards by sub-grid processes .

本文使用了重心和小波两种方法提取字符特征，二次网格法优化参数，多类分类方法对字符进行识别，在实际中取得了很好的效果。

The paper makes use of character barycenter and wavelet to extract character feature , two-grid method to optimize parameters , and multiclass classification to recognize characters , which obtains excellent results in the practice .

两类季风槽内辐散风的动能制造及次网格尺度效应都是主要的动能源，而无辐散风则引起负的动能产生。

The kinetic energy generation induced by divergence wind and the subgrid scale effect is the main kinetic energy source for both cases , meanwhile the non - divergence wind cause negative kinetic energy generation .

结果表明，较小的网格尺度使次网格湍流贡献率大为降低，模式计算结果对次网格参数的依赖性减小，边界层整体特征得到更好的反映。

Simulation results showed that refined meshes reduced turbulent contributions of subgrid scales ( SGS ), sensitivity of simulation results to SGS parameters decreased , and features of the whole boundary layer were explicitly resolved better .

结果表明：就时间区域平均而言，动能制造项是总动能源，动能水平通量散度和次网格尺度过程则消耗区域的动能；

The results show that the generation term is , for the time-area mean , a dominant source ; The divergence of horizontal energy flux and sub-grid processes act as major sinks in the total energy balance .

分析显示，暴雨过程中，4个不同对流参数化方案试验所得到的次网格尺度凝结加热基本都呈单峰特征、加热峰值在对流层中层，但加热层厚度和强度在不同试验间存在差别；

It is found that the distributions of subgrid-scale condensational heating rates of 4 runs are similar in the vertical heating peak feature ( at the middle level of the troposphere ), but are different in the heating thickness and strength ;

本文计算了1981年7月到9月南海区域的热量、动量收支，分析了扰动活跃期的运动场特征，讨论了次网格扰动对大尺度热量场和动量场的再分配作用。

In this paper , we calculated heat and momentum budgets over the Sooth China Sea during a period from July to September 1981 , analyzed the kinetic characteristics during active disturbance period , discussed heat and momentum redistribution of large scale field by the sub-grid disturbances .

本文首先对现有模型简化算法进行分析，在二次误差网格简化算法的基础上，提出了一种基于局部重心度量的边折叠简化算法。

A new simplified algorithm based on Quadric Error Matrix using Local Center of Gravity Measure of vertex was introduced .

然后取较小计算范围进行二次细分网格，以便较准确地模拟地下厂房分步开挖的动态过程。

A small model , in which the mesh was refined , was used to precisely simulate excavation of the underground powerhouse .

本文提出一组安全策略，构建了相应的安全体系结构模型，并从一次典型网格计算过程的角度来详细分析该模型，解决了诸如单点登录、身份映射等问题。

This paper raises a set of security policy , builds homologous security architectural model , and analyses the model detailedly from a angle of grid computational process , solves some problems such as single - on , identity mapping , etc.

距离加权的二次误差测度网格简化算法

Mesh Simplification with Distance - Weighted Quadric Error Metric

文中提出了一种改进最小二次误差准则网格简化算法。

A modified and simplified algorithm based on the QEM algorithm is proposed .