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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。
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Based on two-dimensional elastic wave equation and adopts the well logs as constraint condition, a new imaging method of crosswell seismic data-elastic wave equation inversion and imaging with the well logs constraint is given by using adjoint theory of distribution-parameter control system.
基于二维弹性波动方程,利用分布参数控制系统的伴随理论,采用测井资料作为约束条件,本文给出了一种井间地震资料速度成像的新方法——井间测井约束弹性波动方程反演成像。
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In this paper, the adjoint model is applied to assimilate the temperature and velocity observation data for the optimal initial model state.
在本文的应用中,以流场和温度场的观测资料作为同化资料,以环流模式的初始状态作为控制变量,温度和流速作为状态变量。
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Optimal screw path length: The distance from the optimal entrancepoint to the optimal vent point Screw tail distance: The distance between left and right optimalentrance point Transverse section angle: Half of the included angle between left andright optimal screw Sagital section angle: The average of angle between both side optimalscrew with the upper terminal plate 1.2.2 Modify the threshold of CT value to distinguish the rear partof the lumbar, Observate the the optimal entrance point and the adjustable range.
1.2.2三维重建观察螺钉最佳进钉点的位置和各方向螺钉进钉点关系,调整CT值下限阈值使椎弓后部结构尽量显示清晰,以利观察。 1.3统计方法本实验采用SPSS13.0统计软件。对同一椎体左右两侧椎弓根螺钉相对数据行计量资料配对样本t检验,对男女组间相关数据行计量资料独立样本t检验,对男女组内不同腰椎节段间相关数据行单向方差分析及不同腰椎节段间LSD法多重比较。
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Finally, through the association rule and cluster analysis of data mining, we analyzed consumer adumbration, lifestyle habits and purchasing behavior.
最后利用所建立之关联资料资库透过资料采矿的方法以二阶段分群方法与关联法则,将顾客轮廓、生活型态与购买行为等因素加以分析,做为市场区隔的依据。
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You can review and change the message after the message when you make the information submitted, you must be a change in your information in a timely manner after the update.
您可以在留言后审核及更改您在进行留言时所提交的资料,您必须在您的资料发生变更后及时进行更新。
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The contents of this course include introduction to agribusiness research, design of research, the sources and collection of data, and analysis and presentation.
课程内容包括研究计画书的撰写与评估、研究设计的方法、资料收集的方式、资料分析、以及研究成果报告的表达。
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The object of the study is consumers in Taipei city, and the study used AIO life style scale as the base of market segmentation. Data was collected by using questionnaires based on innovation adoption process, product attributes of portable multimedia player, and demographic variables and analyzed by applying factor analysis, cluster analysis, analysis-of-variance, and chi-square test.
本研究以台北市消费者为研究对象,以AIO生活型态量表作为区隔基础,利用问卷调查方式搜集资料,透过创新采用过程、行动影音播放器之产品属性、人口统计变数作为投入变数,并使用因素分析、集群分析、变异数分析、卡方检定等方法来分析所得之实证资料。
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Use of air conditioning beyond the fixed time, is subject to an extra charge of 10,00 per day.
我们要求阁下输入阁下的信用卡资料,只是发送您的资料到酒店,以保证阁下的预订成功。
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More and more laboratory managers care about the IP address allocation and management problem.
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- 推荐网络例句
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But we don't care about Battlegrounds.
但我们并不在乎沙场中的显露。
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Ah! don't mention it, the butcher's shop is a horror.
啊!不用提了。提到肉,真是糟透了。
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Tristan, I have nowhere to send this letter and no reason to believe you wish to receive it.
Tristan ,我不知道把这信寄到哪里,也不知道你是否想收到它。