分组平差网格计算研究  

Group adjustment based on grid computing

作　　者：李昌贵[1] 吕志平[1] 

机构地区：[1]信息工程大学测绘学院,郑州450052

出　　处：《测绘科学》2011年第5期25-27,共3页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(40874008);国家863计划资助项目(2009AA12Z305)

摘　　要：分组平差是大地测量中一种常用的计算模型,是对大规模平差问题的一种分解,本身具有分布性的特征,适合于网格计算。本文首先通过对分组平差公式的分析,在几个步骤和层面上将其分解为若干子计算,然后提出子计算服务和子计算代理的概念,详细阐述了基本子计算、聚合子计算和工作流的概念,最后给出了并行工作流和串行工作流的实现途径。Group adjustment is a common computation model. It is a decomposition of large-scale adjusment, which is distributable in itself and as a resuh suitable for grid computing. The paper first analyzed the equation of group adjustment and decomposed it into several sub-computations in different steps and levels. Then the paper put forward the concepts of sub-computation service and subcomputation proxy, explained the concepts of elementary sub-computations, aggregate sub-computations and workflow, and finally gave a way to realize the parallel workflow and serial workflow.

关 键 词：分组平差 网格计算 子计算 工作流 

分 类 号：P207[天文地球—测绘科学与技术]