雨区

在研究雨中目标时，本文利用文献提供的雨区传输矩阵，得出介质圆柱在雨中的后向散射矩阵，并进行了相关计算。

While studying the target in the rain , this text exploits the rain belt transmission matrix offered by the existed document to calculate the scattering matrix of the infinite medium cylinder in rain-clutter .

陕西地区虽然不是重酸雨区，但由于雨季的相对集中，年内仍然有低pH值的降水出现。

Although Shaanxi Province is not a region of heavy acid rain , the relative concentration of the rain resulted in low pH in the rainfall .

同时，在MCC转化为MCSs时，x方向的水平涡度逐渐发展成在雨区南部正，北部负的配置，这种配置有利于上升运动的发展和MCSs的形成。

Moreover , the horizontal vorticity of x-direction gradually develops into the configuration that is positive in southern rain area and minus in the north .

在整个梅雨锋暴雨过程中，500hPa高度上的Qq矢量散度辐合场的辐合强度及其辐合中心位置对同时刻的降水强度及雨区位置有非常好的指示作用；

Throughout the Meiyu front rainstorm process , the convergence intensity and center of 500 hPa Qq divergence field are good indicators for the intensity and location of precipitation ;

在撤退期间，南海降水形势变化不大，但在撤退之后，南海夏季风雨季转变为ITCZ雨季，其相应和雨区随着太阳南移向南推进。

During the retreat , the rainfall pattern has little change ; but after the retreat , the ITCZ rain replaces SCS summer monsoon rain , with the respective rain region following the south-moving Sun .

结果表明，ECMWF对副高增衰进退的运动趋势预报能力较强，对中期重大天气过程和雨区预报有重要指导意义。

The result shows that the ECMWF has powerful forecasting ability of the change tendency of subtropical high and significant guiding means for the medium range forecasting of the significant weather process and the rain area .

对流参数化方案的试验表明，Kuo方案能较好地模拟大范围的雨区，Grell方案对强暴雨中心的模拟似乎比其他方案好。

The simulation experiments on convective parameterization schemes indicated Kuo scheme can simulate the large scale area of rainfalls well and Grell scheme is better than Kuo scheme in simulating the centers of heavy rainfalls .

结果表明：三重嵌套在D1，D2域选用积云参数化方案后，模拟的雨区收缩，虚假降水中心相对减少，降水强度及分布更接近观测值。

The results show that the rainfall area shrank reasonably and the spurious rainfall centers comparatively reduced so that the rain intensity and distribution were more approaching to the observational one when the CPS was adopted in the D1 and D2 of triple nesting grid domain .

讨论了雨区在天气图上占的相对面积问题。

In this paper the relative rainfall area in weather chart are discussed .

雨区上空的辐散和200hPa高空急流出口区气块的减速运动相联系。

The high level divergence over the rainfall area is related to the deceleration of air motion .

雨区衰减和雷达取样误差对713型双线偏振雷达测量精度的影响

The effects of attenuation by precipitation and sampling error on measuring accuracy of 713 type dual linear polarization radar

在本个例中，对于雨区分布和降水量。若忽略非相变非绝热过程。

If omitting the process , the forecasts of rainfall amount and its distribution have obvious departure from observation .

降雨强度、雨区衰减与双线偏振雷达观测量关系的研究

A study of the relation between raininess , extinction of rain cloud and parameters measured by a dual linear polarization radar

首先，分别建立了暴雨区长度、暴雨区宽度、毛毛雨区长度和毛毛雨区宽度的神经网络模型。

Firstly , Back-Propagation Neural Network models for the length and width of storm range and drizzle range for OFA were established separately .

3m：南北地震带附近的我国中部多雨，太行山&武陵山以东为少雨区；

3m , there is rainy near north-south seismic belts in center China , and there is less rain at east of Taihang mountain-Wuling mountain ;

还得到了雨区相对面积的出现概率与气象站出现降水的气候概率的理论关系。

This paper also found the theoretical relationship between the appeared probability of relative rainfall area and the climatic probability of rainfall in weather stations .

为双线偏振雷达定量测量降雨工作及讨论雨区对雷达波衰减打下了基础。

This work has laid the foundation of quantitative measurement of rain rate and the discussion of extinction properties of radar wave in rain clouds .

低空能量锋生强度大，体现为雨区能量较环境能量突增的过程；

The intensity of lower-level energy frontogenesis was relatively great , in which the energy over the raining sector increased suddenly compared with environmental energy ;

雷达因此便误以为该反射回来的微波是从第二次发出的脉冲所来，令雷达错误定出雨区是在较近的位置。

The radar thus may mistake the reflected microwave as coming from the second pulse , giving a much nearer but wrong location for the rain .

在毫米波段计算了雨区的后向散射引起的雨杂波功率密度随频率及降雨率的变化。

In the millimeter band , the variations are found of the power density of the rain clutter induced by back scattering with frequency and rain rate .

结果显示，2001年秋季，华西地区阴雨日数多，雨区集中，强降水时段集中在9月份。

The results show that there were more rainy days than normal in 2001 , and the strong raining processes were concentrated around Sichuan Basin in September .

因此雨区南侧低空偏南湿急流的存在对雨区暖盖的增强极为有利。

Therefore , the existence of moist low level jet in the south or south-west of the rainfall region is favorable to the development of the lid .

在极化域中对雨介质和目标的电磁波散射特性进行了研究.得出了雨区的散射矩阵和目标的散射矩阵。

The electromagnetic scattering characteristics of rain media and targets are discussed in the polarization field , with the scattering matrix of rain area and targets are obtained .

在台风登陆之后，除地形雨及中央雨区外，暴雨区多分布在切变线附近，尤其是第三切变线附近。

After landing the patches of heavy rain in typhoon , besides orographic and central area rain , scatter along the shear lines , particularly along the third shear line .

然而，在过去的研究中，由于雨区现象的复杂以及计算方法的局限等，雨区模型往往被过度简化，这势必为整塔计算带来误差。

However , rain zone model tended to be overly simplified in past researches due to its complexity or the limitations of computational methods , which would certainly produce errors .

波状雨区的波长为20100公里左右，传播速度为2045公里/小时，对应的降水周期为14小时。

The wavelength of this area is about 20-100 km , with a speed of propagation being about 20-45 km / hr , and a corresponding cycle of rainfall 1-4 hour .

通过模拟雨区的三维结构，利用几何方法获得平流层通信平台分集增益数据，建立了平流层通信平台分集的经验模型，用实验数据检验模型得到的均方根误差为1.96dB。

An empirical model of platform diversity for stratospheric communications is proposed with diversity gain data for stratospheric communications that are obtained by simulating 3-dimensional spatial structures of rain cells using geometry method .

三重嵌套的中间层细网格已经可以把雨区范围、降水中心位置、降水强度比较接近实况地模拟出来，最内层细网格中模拟出若干个β中等尺度降水中心；

The middle grid of three-nested grid can simulate rain area and the position of rain center and rainfall density accurately , some meso - β scale rain centers appear in inner grid ;

利用C-波段双线偏振雷达定量测量降雨及识别粒子相态的关键是数据的精度，而雨区对雷达波的衰减是造成探测误差的重要因素。

The critical problem in measuring rainfall rate and distinguishing the phase of hydrometeors by dual linear polarization radar is the data accuracy , and the microwave attenuation is very important to measuring error .

本文导出的熵密度变化方程可以阐明，雨区内系统的发生、发展是和降水导致熵减小的物理过程相联系的；

It can be explained by the equation of entropy density variation that the genesis and de-velopment of synoptic system in the rain area are associated with the physical process of the atmo-spheric entropy reduction resulted from precipitation .