Journal of Computer Applications ›› 2012, Vol. 32 ›› Issue (11): 2994-2997.DOI: 10.3724/SP.J.1087.2012.02994

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Application of domain decomposition method in parallel computing of CoLM

  

  • Received:2012-05-18 Revised:2012-07-17 Online:2012-11-12 Published:2012-11-01
  • Contact: SHI Jian-hui

区域分解算法在CoLM模式并行计算中的应用

石建辉1,蒋宗礼2,周文波1   

  1. 1. 防灾科技学院 灾害信息工程系,河北 廊坊 065201
    2. 北京工业大学计算机学院
  • 通讯作者: 石建辉
  • 作者简介:石建辉(1981-),女,湖南岳阳人,讲师,硕士,主要研究方向:网络与网格计算、并行与分布计算;蒋宗礼(1956-),男,北京人,教授,主要研究方向:计算机教育、操作系统、网络计算、人工神经网络;周文波(1982-),男,内蒙古赤峰人,讲师,硕士,主要研究方向:数据库与信息系统。
  • 基金资助:
    中国地震局教师科研基金资助项目(20120109);国家自然科学基金资助项目(41005056)

Abstract: Domain decomposition method has great advantage for solving massive complicated problems. This paper proposed a domain decomposition method based on weighted average. If the research region is relatively big and the calculation accuracy is relatively low, this method is effective. This method decomposed the grid based on the land cover, and discreted parameters using time dimension finite difference method, and then the patches of each grid were weightedly aggregated to obtain the final output. This paper proposed the concrete steps of the method, and validated it by using the sensible and latent heat flux simulation result based on the CoLM model.

Key words: weighted average, domain decomposition, ColM model, performance analysis, sensitivity analysis

摘要: 结合通用陆面模式(CoLM)的特点,针对模式原始数据区域较大、计算精度要求较低的情况,提出基于加权平均的数据区域分解算法。算法根据网格的地表覆盖类型对网格进行分解,对各参数采用时间一维有限差分法进行离散,并对每个区域所含有的地块数进行加权累加,得到每个区域的最终输出结果。通过CoLM模式中的地表感热通量及蒸散模拟结果对区域分解算法进行验证,并进行并行算法性能分析。

关键词: 加权平均, 区域分解, CoLM模式, 性能分析, 敏感分析

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