initial field造句
例句与造句
- The wrf ( v1 . 2 ) system is used to simulate the landing process of winnie in 1997 , and results show that the track , landing time , and landing position of winnie calculated using the common land model ( clm ) and the initial field of 0800 bst on 18th august 1997 are closer to the reality ( fig . 4 . 3 ) than those in the other 7 experiments , indicating the better forecast and simulation capability of the wrf model than the others
应用wrfv1 . 2版系统对1997年登陆台风winnie进行了数值预报模拟研究，结果表明，用通用陆面模式( clm )对8月18日08时初始场计算得到的winnie移动路径、登陆时间及地点(见图4 . 3 )比其它七个试验的计算结果更接近实际情况。表明wrf模式有较强的预报模拟能力。 - The main conclusions are as follows : ( 1 ) this new method can give a quantitative standard to estimate whether this numerical model is able to simulate the observational data at time t . moreover , it can directly find the initial field to simulate optimally the observational data at time t , namely , the optimal initial field
同一个模式中，或者把相同的初始场输入到不同的数值天气预报中心的模式，通过一系列对比试验得出结论。但对于给定的一个数值模式和一种初始场，传统方法则不容易识别哪种误差对模拟结果的影响占主要。 - Mm5 adjoint - model assimilation system not only can improve the initial field effectively and promote the coordination with the model but also can enhance the forecast on the precipitation and other elements . the assimilation of cdw has an improvement on quality of upper wind . the effect of direct numerical simulation with utilizing the cdw to amend the initial field gains the advantage over the one not
结果表明， mm5伴随模式同化系统能有效改善初始场与模式的协调能力，提高模式对于降水场和其它要素场的预报；使用云导风资料修正初始场后直接模拟的效果比未使用时直接模拟的效果要好，对部分区域的强降水预报精度有一定程度的改善；使用伴随模式同化系统后，加入云导风资料的同化试验对其它要素的改善与直接同化常规资料的效果相比，改善优势不明显，但从各要素的误差来看，对于风场的改善最好。 - The technique of variational data assimilation has been considered as an effective method in the aspect of improving the quality of the initial fields of numerical weather predication ( nwp ) . however , it does make strong demands on mathematical property of the cost function , in the meantime , it needs higher demand by using local optimization method and depends on the computer resource
变分同化技术被公认为是提高数值模式初始场质量的有效方法之一，但它对目标函数的数学性态有较高的要求，同时，目前的四维变分同化技术在业务中要求有较高的环境才能实现。 - The paper makes use of doppler radar data to mesoscale numerical model , through adjusting divergence fie ld , vertic al velo city fie id etc . to improve on initial field . the investigation results show that there is a improvement in the forecasting effects , precipitation position is closer to practicality
试验结果表明，在中尺度数值模式中利用多普勒雷达观测资料，对初始场进行修正，通过散度和垂直速度场等的调整，有效提高预报效果，使得雨区范围和雨量更接近实况。 - It's difficult to find initial field in a sentence. 用initial field造句挺难的
- However , this method can not give all possible significative combinations of physical processes and parameters ( initial fields ) when making sensitivity analysis to model ( initial ) errors . moreover , the initial and model errors may be large when the numerical simulation is good
例如，对数值模式进行模式误差的敏感性分析时，不能穷尽数值模式中各个物理过程和模式参数所有有意义的可能组合；对数值模式进行初始场误差的敏感性分析时，不能穷尽数值模式所有可能的初始场。 - In this context a genetic algorithm ( ga ) was applied to the four - dimension ( 4 - d ) variational data assimilation , which provided a kind of new and effective method in the initial field optimization . the theoretical basis and detailed algorithm were introduced in this paper . at the same time , according to the property of the variational problem itself , we designed the rational genetic coding , operators and parameters
本文将遗传算法应用于四维变分资料同化问题，提供了一种新的较为有效的nwp初始场优化方法，给出了相应的理论依据和详细算法，并结合变分问题本身的特点，设计了合理的遗传编码、遗传操作和遗传参数。 - The initial field of the model is the in situ observational data . combining the observational data by the doppler weather radar , the distribution and evolution of macro - physical as well as micro - physical variations such as wind field structure , radar echo structure , overhang echo , bound weak echo region , strong echo wall , water content , etc . in the storm were analyzed
利用中国科学院大气物理研究所建立的完全弹性三维雹云数值模式，模拟了1996年6月29日发生在北京东北部京冀交界地区的一次强单体雹暴过程，并结合多普勒雷达探测资料，分析了风暴的流场结构，雷达回波结构特征，含水量场等宏微观物理量的分布及其演变。 - Observations obtained from overseas sources as well as from local networks are decoded and quality - checked for doubtful or erroneous data . short - range forecast fields i . e . 3 - hour forecast from 20 - km inner model and 6 - hour forecast from 60 - km outer model from the previous model run are used as first - guess or background in assimilating the latest observational data . objective analyses are then carried out and currently a three - dimensional optimal interpolation method is used to prepare the initial fields for the model forecast
天文台从海外及本地网络取得观测资料，经过译码后，便会进行质量控制检查，把可疑和错误的数据剔除，然后利用上一次模式运行所得出的短期预报场，即20公里内模式的3小时预报及60公里外模式的6小时预报，作为初估背景场，再注入最新观测数据，进行客观分析，以得出模式预报的初始场。
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