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In this paper a genetic algorithm four-dimension data assimilation system was applied to the more complex MM5 model, we verify the performance of the genetic algorithm assimilation system, we take the a heavy rainfall process during 04-05, July, 2003 as the experimental research object, and carry out data assimilation experiment of actual observation data, compare the experimental results of the genetic algorithm assimilation system and MM5 adjoint model assimilation system with the experimental results without assimilation, the following is the result:genetic algorithm assimilation system is used not only in a barotropic primitive equation but also in the complex model, MM5, for example, in the ideal experiment the result of the genetic algorithm assimilation system is better than the MM5 adjoint model assimilation system, in the assimilation experiment of actual observation data, whichever assimilation system is used, the initial field of numerical prediction model is effectively improved and the prediction effect of physical field and rainfall are somewhat enhanced.

本文将遗传算法的四维同化系统运用到更复杂的MM5模式中,在理想实验中验证遗传算法同化系统的性能,并以2003年7月4日"南京暴雨"作为研究对象,进行了实际观测资料的同化,并将遗传算法同化系统和MM5伴随模式同化系统得到的结果跟未同化的结果进行了比较,结果如下:遗传算法同化系统不仅可以用在正压原始方程模式上,同样也可以用在MM5等复杂模式上,理想实验证明了遗传算法同化系统优于MM5伴随同化系统,在实际观测资料同化中,采用两种方法的同化系统都能有效地改善数值预报模式的初始场,能在一定程度上提高物理量场和降水量的预报效果。

At the same time, the retrieval method of sun photometer data, including the calibration and retrieval of aerosol optical depth and the quality control of data, is introduced.

同时,针对光度计原始观测资料直接应用的瓶颈问题--资料解读方案进行了讨论,包括定标、气溶胶光学厚度的计算、光度计数据质量控制方法等。

All enters primitively the material will quote to register the material.

所有原始键入的资料将引用为注册资料。

These results have indicated that the telencephalon of the subadults had the roughly similar structure with the adults, and that Onychodctylus fischeri is a relatively primitive type in amphibian. This research, at some extent, has filled in the blank space data in nerve system and nerve development of tailed amphibian type.

这些都表明亚成体爪鲵的端脑已大致具备了成体所具有的结构,并且也说明了爪鲵在两栖纲动物中属于较原始的种类,这在一定程度上填补了有关有尾两栖类神经系统资料以及神经发育资料的空白。

Weka is one of the open-source software that contains plenty of data mining algorithms and statistic analysis methods. More and more researchers use Weka because it is not only free and easily available but it also provides a great graphical user interface. However, much inconvenience remains within Weka.

Weka 是一个拥有完整资料探勘技术的开放原始码软体,使用者越来越多的原因,不仅是因为它免费,容易取得,也是因其完整的资料探勘技术及演算法,良好的图形化介面提供初学者一个友善的平台。

Japonica. Brief speculation on the evolutionary trend of the seed-coat micromorphological features of the genus Kadsura is discussed.Cladistic principles and methods have been employed in this study. The morphological characters have been polarized for phylogenetic analysis. Cladograms have been gotten with the related genus Illicium as the outgroup. As a result, a new system of the genus Kadsura has been reconstructed.

整理有关南五味子属植物研究的资料,补充搜集整理近期发表的资料和作者研究所得的数据,采用分支系统学的原理及方法,对本属植物的形态性状进行分析,确定性状极性,以种为基本进化单元,选择近缘且原始的八角属Illicium作为外类群,采用PAUP软件,对本研究得出的性状数据作系统分析,重建南五味子属的系统发育。

Requiring the object subject to examination to provide the relevant original recordings and vouches, statistical ledgers, statistical investigation forms, accounting materials and other relevant certificates and materials

要求检查对象提供有关原始记录和凭证、统计台账、统计调查表、会计资料及其他相关证明和资料

All of these fabrications have long been criticized by historians. Besides the collations of many historical references, the dissertation has done much painstaking textual research on Taoism figures and Taoist temples records scattered in the original accounts, such as regular historical descriptions, collections, poetry, notes, epitaphs and classical works of Taoism and Buddhism, etc.

因此,本文在爬梳了大量文献资料的基础上,对散见于史籍、诗文笔记、金石、方志、类书以及道藏、佛藏等原始文献中有关唐代道教人物传记及宫观沿革资料,进行了大量细致的考证,然后,按照一定的体例,编撰了唐代道教人物传略及道教宫观录。

In this study, World Elite Women 400 m Hurdlers for study, and through the published literature for the results of the world Elite 31 Women 400 m Hurdlers (53.923 s±0.668), 0-10-1 hurdle time and steps, 1-10 hurdle and the time between steps, 10 hurdle and the end time and so on. With the use of Microsoft Excel 2003 software to analyze raw data, then use SPSS11.5 software on the mathematical statistics data processing, summed up the results, analysis and comparative studies.

本研究以世界优秀女子400m栏运动员为研究对象,通过已公开发表的文献资料获得世界优秀女子400m栏运动员31人的比赛成绩(53.923 s±0.668),0-1栏时间和步数、1-10栏各栏间时间和步数、10栏-终点时间等原始数据,使用Microsoft Excel2003软件对原始数据进行必要的计算,再运用SPSS11.5软件对有关数据进行数理统计处理,对结果进行归纳、分析与比较研究。

Model comparisons for estimating water and heat fluxes of reed wetland ecosystem in Panjin were done among Profile gradient method,Bowen ratio energy balance method and Eddy covariance method,based on the data from July 1 to July 31,2005 by open-path eddy covariance system(Li-7500,Li-cor Inc,USA) and the micro-climate gradient observation system.

利用2005年7月盘锦芦苇湿地生长旺季的小气候梯度系统30 min观测资料和开放式涡动相关系统10Hz原始观测资料,比较并分析了廓线法、波文比能量平衡法与涡动相关法计算的芦苇湿地生态系统水热通量。

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推荐网络例句

I smile at your play with that little bit of a broken twig.

我微笑着看你玩那一段小小的树枝。

They may be produced for almost any shaft angle.

他们可能在制作中几乎任何一个轴角。

The effects of several parameters on thestate of the accelerated flyer and the characteristics of shock wave propagation in thetarget were studied in detail, and the physical data and physical profilers wereobtained more generally, which made us understand the whole physical process moreprofoundly.

首先,数值模拟了激光直接驱动铝飞片碰撞铝靶模型,对各种物理参数对飞片飞行状态和靶中冲击波特性的影响程度进行了比较详细的研究,得到了比较全面的物理数据和物理图像,对整个的物理过程有了比较深刻的理解。