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定量降水
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  quantitative precipitation
     By using the historical data of the Three Gorges Reservoir (TGR), a flood forecasting model for TGR intervening basin was proposed and established, with which the quantitative precipitation predicted data was coupled to study the influence of flood forecasting accuracy.
     选用长江三峡水库区间流域的历史雨洪资料与短期定量降水预报资料,编制三峡水库区间流域洪水预报模型,并将区间定量降水预报与区间洪水预报模型相耦合,研究了预见期降水对洪水预报的影响。
短句来源
     Microcomputer automatic processing system of objective quantitative precipitation forecast for each county
     分县客观定量降水预报微机自动化处理系统
短句来源
     By using GMS-5 IR1 TBB of landfalling typhoon(LT) and hourly rainfall from ground automatic weather stations,a preliminary method of quantitative precipitation estimation(QPE) suitable for LT was found. Based on the results from the QPE method,the short-term quantitative precipitation forecast of 0 h to 3 h(QPF) for LT can be realized with the extrapolation method preliminarily.
     利用登陆台风的GMS-5 IR1 TBB资料及地面自动站逐时雨量资料,初步建立了适用于登陆台风的定量降水估计(QPE)方法,基于QPE结果,采用外推法,初步实现了对登陆台风未来0~3 h的短时定量降水预报(QPF)。
短句来源
     A PRELIMINARY STUDY ON METHOD OF QUANTITATIVE PRECIPITATION ESTIMATION(QPE) FOR LANDFALL TYPHOON
     一种可用于登陆台风定量降水估计(QPE)方法的初步建立
短句来源
     This system established some modules of real-time data automatic processing, objective quantitative precipitation forecast automatic manufacture for each county,forecast result output in text and graphical.
     该系统采用VB5编程,建立了实时资料自动处理、分县客观定量降水预报自动制作、预报结果文本、图形输出等模块。
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  “定量降水”译为未确定词的双语例句
     Simulated 6-h rainfall indicates that radar reflectivity assimilation has greater positive effects than radial velocity on the rainfall simulation,although adding radial velocity data results in further improvement in the rain simulation.
     通过模拟的6 h降水对比发现,利用雷达径向风调整初始场后,对降水模拟有一定的改进,但效果不甚明显,而雷达反射率资料对定量降水预报改进效果明显,同时使用雷达径向风和反射率资料改进初始场后对降水的模拟效果最明显。
短句来源
     Through successive monitoring and analysis of satellite cloud picture,rain detection radar data and conventional meteorological data as well as analysis of numerical weather prediction results,the quantitative precipitations of 12,24,48 h were forecasted.
     预报处通过对卫星云图、测雨雷达、常规气象资料跟踪监测分析及数值预报产品的分析 ,完成了 12、2 4、48h定量降水预报。
短句来源
     Cloud Classification of GMS-5 Data and Its Applicationin Rainfall Estimation
     GMS-5四通道云图的自动分类及其在定量降水估算中的应用
短句来源
     Moreover, the group of data closest to those of the actual radar observation is further compared with the raindrop size distribution and the raingauge. Results show that, the improved model performs pretty well in analyzing the widening process of the raindrop spectrum of several kinds of updraft.
     结果显示,模式能够很好的模拟几种上升气流下雨滴粒子谱的拓宽过程,同时模拟结果能够很好的幅合实际雨滴谱的观测值以及地面雨强,为模式与雷达观测相结合测定定量降水提供了一个有效的工具。
短句来源
     Examination proves that this method improved the forecasting of extreme weather events.
     试验证明,通过上述两步得到的定量降水预报,对提高极端天气事件的预报确率有一定效果。
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  相似匹配句对
     First Research on Realtime Quantitative Precipitation Forecasting
     实时定量降水预报初探
短句来源
     THE STUDY OF ESTIMATING RAIN AMOUNT BY GEOSTATIONARY SATELLINT IMAGES
     云图定量降水估测研究
短句来源
     JIANGXI RAINFALL
     江西降水
短句来源
     Acid Deposition
     酸性降水
短句来源
     Cloudiness Measuring and Calculating Quantitatively
     云量定量测算
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  quantitative precipitation
A short-range quantitative precipitation forecast algorithm using back-propagation neural network approach
      
Quantitative precipitation forecasts (QPF) and the probabilities of categorical precipitation were obtained.
      
Most of these give quantitative precipitation of thorium and zirconium in acid solutions.
      
The presence of nitric and phosphoric acids and free Cl-- and NO3/--ions have been found to interfere with a complete and quantitative precipitation of this metal iodate.
      
Conditions are described for the quantitative precipitation of bismuthyl dichromate, (BiO)2Cr2O7, and the suitability of this reaction for the gravimetric estimation of bismuth is shown.
      
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This paper studies the cloud classification based on the spectral characteristics of the Geostationary Meteorological Satellite (GMS-5) observations at both day and night time. The difference between 115 μm window and 67 μm water vapor channels replace the visible one in the nighttime cloud classification With such a “new channel”, the accuracy of the classification is very close to that of daytime one with both infrared and visible channels, which shows that the water vapor channel plays an important role...

This paper studies the cloud classification based on the spectral characteristics of the Geostationary Meteorological Satellite (GMS-5) observations at both day and night time. The difference between 115 μm window and 67 μm water vapor channels replace the visible one in the nighttime cloud classification With such a “new channel”, the accuracy of the classification is very close to that of daytime one with both infrared and visible channels, which shows that the water vapor channel plays an important role in the nighttime cloud classification when only infrared channels are available. Then the convective and stratiform rainfall estimation from classified cloud image was made using a one-dimensional cloud model. The statistically accurate rainfall estimation from one case reaches 70%, which shows the potential application of this method in the operational use of GMS-5 and FY-2 data. 

根据日本地球静止气象卫星(GMS-5)云图的新特点,运用动态分类方法对GMS-5四通道卫星云图进行分类,得到各种云类及地表。并由分类结果,根据一维云模式得到的对流云对流核心云顶温度与降水之间的关系,对层云和对流云做定量降水估算。并用1995年8月31日的云图资料进行对流云和层云的降水估计试验,将估算出的降水率和降水面积与地面1h的观测降水资料进行比较,结果表明:假如设置40%为降水的允许误差,那么降水估计的准确覆盖率将达到70%。能在业务应用中推广,并且该方法可以应用到即将发射的风云2号气象卫星资料处理中。

The HIRLAM model (a limited area numerical weather forecasting model developed by the Nordic countries) was applied to the summer heavy rain cases in China to study the effect of the methods for constructing initial fields on numerical rainfall forecasts of a limited area model. Two methods for constructing the initial fields are compared: one initial fields is provided by the HIRLAM's own data assimilation system, another is given by interpolating the ECMWF global model's analysis fields into the HIRLAM grids....

The HIRLAM model (a limited area numerical weather forecasting model developed by the Nordic countries) was applied to the summer heavy rain cases in China to study the effect of the methods for constructing initial fields on numerical rainfall forecasts of a limited area model. Two methods for constructing the initial fields are compared: one initial fields is provided by the HIRLAM's own data assimilation system, another is given by interpolating the ECMWF global model's analysis fields into the HIRLAM grids. The two numerical experiments corresponding to these two methods for constructing the initial fields are the control experiment(CONL) and the comparison experiment (COMP), respectively. The rainfall predicted by CONL and COMP are compared with observation, the results show: (1) when the resolution of ECMWF global model, whose analysis is used to provide initial fields for HIRLAM model in COMP run, is considerably lower than that of HIRLAM model, the rainfall forecast is markedly improved in CONL in which the initial fields are provided by HIRLAM's own data assimilation system, in comparison with that in COMP. (2) when ECMWF model and HIRLAM model approximately equal resolution, the qualities of rainfall forecasts in CONL and COMP turn out to be at nearly the same level in spite of the supposed better consistency between initial fields, model dynamics and model's topography in CONL.

北欧有限区域模式HIRLAM被应用于中国的暴雨个例以探讨初值形成方法对有限区域模式定量降水数值预报的影响。对两种初值形成方案进行了对比,一种是由HIRLAM自已的数据同化系统提供初值;另一种是直接内插ECMWF全球模式的相应分析场。与这两种方案对应的数值试验分别是控制试验(CONL)和对比试验(COMP)。将CONL和COMP的降水预报与观测值比较,结果表明:(1)当为COMP提供初值的ECMWF全球模式的分辨率明显低于HIRLAM模式的分辨率时,则采用HIRLAM模式自已数据同化系统提供初值的CONL的降水预报结果较之COMP的相应结果有显著改善;(2)当ECMWF全球模式的分辨率与HIRLAM模式的分辨率接近时,则COMP和CONL中的降水预报水平相近,但各有所长。因此,我们得到如下的印象:由于较高的分辨率导致第一猜测值质量的提高是造成上述第一点中CONL预报明显优于COMP预报的主要原因,而CONL避免了COMP中的异模式协调误差,这一点似乎并未导致预报质量的明显提高。

The current development of weather forecast technigue in the United States was presented. It is suggested that it is the technological development of the atmospheric probing,the numerical weather forecast and the visualization that impels the conventional weather forecast in the United States toward quantization and timing. The realization of quantitative precipitation forecast is an important mark of qualitative toward the quantitative weather forecast. On the basis of making the best use of the numerical model...

The current development of weather forecast technigue in the United States was presented. It is suggested that it is the technological development of the atmospheric probing,the numerical weather forecast and the visualization that impels the conventional weather forecast in the United States toward quantization and timing. The realization of quantitative precipitation forecast is an important mark of qualitative toward the quantitative weather forecast. On the basis of making the best use of the numerical model products, composing satellite and radar data, the method of the objective forecast is established. It makes a good effect on the forecasts of heavy rain and severe convective weather. The advancing of mesoanalysis of operational forecast system improves obviously the forecasting skill of precipitation. The interpretation of numerical weather forecast product and the operational forecast system in the United States are presented. Finally, the inspirations drawn for China's weather forecasts have been put forward.

介绍了美国天气预报技术的发展现状。指出在大气探测技术、数值预报及可视化技术发展的推动下美国传统的天气预报向定量与定时方向发展。定量降水预报的实现是天气预报由定性走向定量的重要标志。在充分利用数值模式产品的基础上综合应用卫星与雷达资料建立客观预报工具在暴雨和强对流天气预报中取得较好效果;中尺度分析业务系统的不断改进使降水预报的技巧有明显提高。作者还介绍了美国数值预报产品释用及预报业务系统的概况。最后提出了对我国天气预报技术发展的启示。

 
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