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近实时公共气象服务分析图网站发布 总被引:1,自引:1,他引:0
给出一种基于开源IDV工具构建气象产品网站发布平台的设计思路和实现方法。近实时公共气象服务分析图将使用人员定位于浏览器端县乡级气象、农技、公众群体,突出分析图的时空分级覆盖、耕作层气象服务、山地气象服务和灾害气象服务。通过内容、时间、区域以及表现形式4个方面的分解,描述了网站的设计原理。通过本体技术实现气象要素向气象知识的过渡。通过图形产品的静态和动态层分别处理,提高了二维和三维图形产品的生成速度。构建形成的气象产品发布平台已经在多个网站得到应用并得到好评。 相似文献
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C. Jin T.P. Krichbaum A. Witzel R. Nan B. Peng A. Kraus A. Lobanov S. Qian J.A. Zensus 《Astrophysics and Space Science》2001,277(1-2):97-100
A numerical model of magnetic turbulence allows us to compute the diffusion coefficients for different degrees of anisotropy,
and in particular for the cases corresponding to the solar wind. We consider here the problem of the propagation of the energetic
particles accelerated by corotating interaction regions (CIRs) and observed by Ulysses at high heliographic latitudes. The
excursion in latitude of a magnetic field line located at large heliospheric distance is evaluated with a Monte Carlo simulation.
In the calculations, the random `force' terms are proportional to the square root of the diffusion coefficient in each direction.
By tracing a large number of field lines, we can devise how the particles would be seen by Ulysses. Good agreement with the
actual observations is found.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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