操作 1.(按照一定的程序和技术要求进行活动) operate; manipulate; handle 易于操作 be handled easily; simplify operation; 你知道这机器应怎样操作吗? do you know how to handle the machine? 我们这个型号(的机器)很容易操作和保养。 our model is easy to operate and maintain.2.(所进行的若干连续生产活动的总合) operation; manipulation; handling; machining; processing 手工操作 manual operation; 循环操作 cycle operation; 双手操作 (法) conjoined manipulation
Db2 udb does not have native support for bit or boolean data types , neither for bitwise operation nor for boolean algebra operations Db2 udb没有为位数据类型或布尔数据类型提供本机支持,它既不支持逐位操作,也不支持布尔代数操作。
Currently , wiis has been an important research direction . this dissertation mainly focuses on some key problems in wiis : common data model , query optimization , cooperation and learning to enhance performance of wiis . the main contributions of this dissertation are as follows : ( 1 ) firstly , the current approaches of information integration are summarized and classified ( 2 )提出了一种面向xml的公共数据模型xcdm ,该模型针对已有的半结构化数据源模型( oem和oim )在表达xml文档时存在的缺陷,将oim的有向图结构与xml语言的相关特性相结合,并补充了oim对象代数的六种代数操作。