共查询到19条相似文献,搜索用时 46 毫秒
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本文就海洋遥感开发项目当中碰到的一个问题,从实用的角度,阐明了三角网法绘制等值线的基本原理,并给出了根据三角网法制作的一幅海温等值图,最后推而广之,展示了该方法在气象上的广泛用途。 相似文献
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张顺谦 《高原山地气象研究》2005,25(1)
基于三角网格法进行等值线绘制比常用气象绘图软件的矩形网格法更客观更快速,而在众多的三角网剖分方案中,以Delaunay三角网最好最正规.本文是关于二维离散场等值线绘制的算法集成,详细介绍了Delaunay三角网的逐点插入生成算法中所涉及到的凸壳生成、初始三角网生成、逐点插入、LOP优化、寻找包含插入点P的三角形等过程的算法流程,并给出了不规则区域等值线绘制中所采用的二次B样条曲线光滑、交点计数法点面关系判识、互为异侧法线段相交判识等关键算法. 相似文献
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以一个实例详细介绍了利用 Gr ADS绘图系统绘制具有不规则边界的站点资料等值线的方法 ,使站点等值线的绘制变得简单易行 ,图形输出更为美观。并对 Gr ADS系统存在的一些问题进行了讨论。 相似文献
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该文以绘制贵州省等值线雨量图为例,着重介绍利用Surfer软件绘制区域图和在底图上绘制等值线图的方法,展示用Delphi7.0编程语言调用Surfer8.0的绘图函数,实现Surfer8.0与Delphi7.0之间的API自动化接口,从而实现区域等值线图的程序化输出。 相似文献
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科氏力作用下涡旋运动的等值线动力学 总被引:1,自引:1,他引:1
本文提出了在科氏力作用下,单圈常值涡旋运动等值线动力学的计算公式。用这些公式实施了四组计算,结果与以往动力学分析和数值试验的结论定性一致,数值也较为合理。 相似文献
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为了便于四川省局和地区气象台站值班人员对实时资料的监控和各级管理部门的工作,作者用Microsoft Visual Studio .NET 2003开发环境,结合SQL Server数据库技术,开发了一个B/S模式的省信息中心实时资料监控统计平台.本文主要对该平台的实现过程做一简要介绍. 相似文献
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A New Strategy for Solving a Class of Constrained Nonlinear Optimization Problems Related to Weather and Climate Predictability 总被引:2,自引:0,他引:2
There are three common types of predictability problems
in weather and climate, which each involve different constrained nonlinear
optimization problems: the lower bound of maximum predictable time, the
upper bound of maximum prediction error, and the lower bound of maximum
allowable initial error and parameter error. Highly efficient algorithms
have been developed to solve the second optimization problem. And this
optimization problem can be used in realistic models for weather and climate
to study the upper bound of the maximum prediction error. Although a
filtering strategy has been adopted to solve the other two problems, direct
solutions are very time-consuming even for a very simple model, which
therefore limits the applicability of these two predictability problems in
realistic models. In this paper, a new strategy is designed to solve these
problems, involving the use of the existing highly efficient algorithms for
the second predictability problem in particular. Furthermore, a series of
comparisons between the older filtering strategy and the new method are
performed. It is demonstrated that the new strategy not only outputs the
same results as the old one, but is also more computationally efficient.
This would suggest that it is possible to study the predictability problems
associated with these two nonlinear optimization problems in realistic
forecast models of weather or climate. 相似文献
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各级气象部门收集的乡镇(炮点)雨量,一般需要对其进行归纳整理,最后以报表的形式进行存档。采用手工统计和分析是很难办到的,为了提高乡镇(炮点)雨量报表制作、整理的工作效率,这里介绍了用Microsoft Visual Basic6.0(以下简称VB)编程来制作乡镇(炮点)雨量报表的技巧。 相似文献