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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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Then, theoretically, mathematical morphology is stretched from complete lattices to complete semi-lattices and the adjunction of complete semi-lattices is studied. Some qualities of mathematical morphology on complete semi-lattices are discussed and supported. Two examples of difference semi-lattice and reference semi-lattices are also supplied.
然后在理论上,把数学形态学从完备格延伸到完备半格,研究了完备半格上的伴随,讨论并证明了完备半格上数学形态学的一些性质,列出了差分半格和参考半格两个例子。
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The FlySet hangs from the gym ceiling. It consists of a durable three-stranded rope fixed to the ceiling with a 360-degree swivel point at an adjustable length with two attachment loops.
FlySet吊在健身房的天花板上,它的构成是这样的,在一个360度旋转点上设一根固定在天花板上的耐用三股绳,再用两个附加环来调整长度。
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All of the F1 call to be the Championship (Chinese:a class equation race car a world championship)of the FIAFormula World",.F1 and World Cup Soccer, Olympic sports games because of influence scope wide, popularity Gao, and be called "world three big sport, F1's race car is the most expensive in the world, speed most quick, science and technology content the tallest sport, included to regard aerodynamicist as principle, plus radio communication, electrical engineering...etc. in the world most the forerunner's technique is a lot of new science and technology can at the beginning practice on the F1.The F is a FORMULA abbreviation, namely equation;1 explanations include a lot, can comprehend for the top car hand, top-class game, cash award etc..
F1的全称是FIAFormula World Championship"(中文:一级方程式赛车世界锦标赛),。F1 与世界杯足球赛,奥林匹克运动会因为影响范围广,知名度高,并称为"世界三大运动,F1赛车是世界上最昂贵、速度最快、科技含量最高的运动,包含了以空气动力学为主,加上无线电通讯、电气工程等世界上最先进的技术很多新的科技都是在F1上得以最初的实践的。F是FORMULA的缩写,即方程式;1的解释有很多,可以理解为顶尖车手,顶级赛事,奖金等等。
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Xiao Qian pursue the fighting and the sociality in his novel creation, but the melancholy temperament of individual, the tragedy of novel content make Xiao Qian"s novel formed melancholy keynote in whole; lyrics in the art, the psychology distance of create aesthetic, the feelings of writing are controlled and objective, it make his novel write sober; construction the image of poetry and interweave with feeling, symbolism and the poetry of language make Xiao Qian"s novel formed poetry.
指出萧乾在创作中追求小说的社会性、战斗性与艺术性的和谐,由于个体的忧郁气质,小说内容的悲剧性使萧乾小说在整体上形成忧郁的基调;艺术上的抒情写意,创作审美的心理距离的运用,书写的情感节制,让萧乾的小说叙写上冷静客观;诗意意象的塑造,并与情感相交织,象征手法的运用以及语言的诗意质感使其小说具有诗意美。
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The respiratory portion begins when an air sac first arise which appears as an outpocketing of the bronchiole.
呼吸性细支气管:壁上有散在的肺泡开口,上皮为单层立方上皮,在肺泡开口处,移行为单层扁平上皮。
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Cherry kebab on the menu comes from the northern city of Aleppo, whose rivalry with Damascus is historic.
菜单上的cherry kebab(译注:樱桃汁做的烧羊肉)是从叫Aleppo(译注:叙利亚人口最多的省——Aleppo省的首府,也是世界上最早有人居住的城市之一)的北方城市传来的,这个城市在历史上一直跟大马士革有着敌对的关系。
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Fuzzy logic is studied with algebraic tools in this paper. A kind of algebraic abstract of fuzzy logic, Implication Algebra on a partial ordered set, is given. The relations between Implication Algebra and other algebraic structures, such as MV-Algebra and Heyting Algebra etc., and the filter and the structure of Implication Algebra on a partial ordered set are studied.
本文的目的是使用代数工具对模糊逻辑进行研究,给出模糊逻辑的一类代数抽象,即偏序集上的蕴涵代数,研究偏序集上蕴涵代数与其它代数结构,如MV-代数,Heyting代数之间的关系,以及偏序集上蕴涵代数的滤子与其结构等。
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The findings show how the students understanding the concept of complex number and other related concepts:(1) The concepts of complex number is understood from the perspective of algebraic expression;(2) The concepts of complex number is understood from the perspective of geometry;(3) The concepts of complex number is understood comprehensively.
结果显示,学生对复数及其一些概念的理解呈现三个侧面:(1)代数式子意义上理解的复数;(2)几何意义上理解的复数;(3)整体意义上理解的复数。
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In this paper, we summarize the foundations of Algebraic function fields, algebraic curves over finite fields and algebraic geometry codes, then we focus on the dimensions of codes on the quotient of the hermitian curves, by using the theory of weierstrass semigroup and the idea of Ho...
我们在系统地总结了代数函数域,有限域上的代数曲线和代数几何码的基本知识的基础上,利用Weierstrass子半群理论,使用Homma和Kim的方法,讨论了Hermite曲线商域上码的维数问题,得到的主要结果如下: 1。
- 推荐网络例句
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Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".
歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车,和一双合并为一移交&整个lotta爱&。
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This is Kate, and that's Erin.
这是凯特,那个是爱朗。
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Articulate the aims, objectives and key aspects of a strategic business plan.
明确的宗旨,目标和重点战略业务计划。