demand attachment

As the development of grid and data mining,advance an algorithm of maximal frequent itemset data mining based on grid.

随着网格和数据挖掘技术的发展,提出了网格平台下最大频繁项集数据挖掘算法,采用数据库的垂直表示和基于前缀关系的等价划分,以等价类长度的指数函数作为等价类的权值,减少剪枝对负载的影响,合理划分等价类,在动态负载平衡情况下使处理机异步计算,大大提高算法的执行效率。

Combined with the project examples,it introduces the construction methods of basic mass concrete,gets the calculation to the temperature of mass concrete,foundation restraint coefficient,shrink,maximum stress and the anti-crack coefficient,and puts forward the steps of assuring the not crack of concrete,this will assure the project quality of mass concrete.

结合工程实例,介绍了基础大体积混凝土的施工方法,进行了大体积混凝土温度、地基约束系数、干缩及最大应力及抗裂安全系数的计算,并提出了确保混凝土不开裂的措施,从而保证大体积混凝土的工程质量。

It has found out these members dangerous position with the maximum stress and calculated the stress value, made the goal and the range of daily check more definite and concentric, provided the theory basis for establishing reasonable particle check system.

用大型有限元程序ANSYS分析了10t门座起重机主要构件的力学性能,找出了这些构件具有最大应力的危险部位并求出了它们的数值。

The stress accumulating region and the maximum stress is calculated through cosmosm statics analysis program.

以１５０轨钢机上无螺栓十字轴万向联轴器叉头为例，建立了叉头的三维有限元分析模型，并运用Ｃｏｓｍｏｓｍ程 序进行静力学分析，找出了叉头的应力集中区和最大应力值，分析了叉头发生破坏的原因，提出了叉头 结构设计时可采取的措施。