- join (mathematics)
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并运算的英文
例句与用法
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- 3 ) we build a mathematical model of distributed concept lattice and discuss the union operation to combine two extention - independent same field lattices and the union operation to combine two intention - independent same field lattices . the experiments show that our union operation algorithm is superior to the algorithm that gets the lattice from context directly in time - consuming . for the completeness in mathematics , we also discuss the intersect operation to remove everything except the overlapping areas of two same field lattices
( 3 )给出了分布式概念格的数学模型，重点讨论了在分布式概念格的数学模型下，外延独立和内涵独立的两个同域概念格的并运算，研究高效的合并两个同域概念格的算法，实验结果表明我们的并运算算法在时间性能上要优于直接从原形式背景中构造概念格的算法。 - In the first place , the study processed data of remote sensing and non - remote sensing to be digital , vector , raster and imagery geocode , established geographic database of soil erosion , and calculated elements " pixel maps of soil erosion . secondly , by using model builder of arcview to establish dynamic survey model of soil losses in longchuan river drainage basin . at last , to obtain maps of status & the forecast maps for soil conservation
首先通过遥感与非遥感资料的数字化、矢栅化及图形图像地理配准，建立了水土流失地理数据库，并运算出水土流失各因子像元图；在此基础上，凭借arcview子模块modelbuilder的支撑，建立龙川江流域水土流失动态监测模型；最后运行该模型获取水土流失现状图和防治预报图等结果图件，完成了研究区1998 、 1999年水土流失定量遥感监测任务。 - The conditions for preserving structural and dynamic properties of the net after these operations were discussed . some net operations are further studied in this thesis . union operation is analyzed and one exampl e is given to make the background and meaning clearly for net decomposition operations
结合近年来petri网理论的发展，本文进一步研究了网运算，分析了并运算的代数性质；针对网的分解运算，给出实例显示了网的分解运算的背景及意义；同时讨论了网的并分解及和分解，研究了这些运算保持网的结构性质和动态性质的条件。
百科释义
在数学中，集合上的并(join)可以用两种方式定义：关于这个集合上的偏序的唯一上确界(最小上界)，假定这种上确界存在的话；或者是满足幂等律的交换结合二元运算。在任何一个情况下，这个集合与并运算一起是并半格。
详细百科解释