Our electronic technological development organizing devoted to the whole solution of the electronic product and suffused with household appliances , function type electric apparatus , electromechanics products equipment , etc . we offer the whole procedure service for industrial manufacturer . here many professional engineers with brand - new original idea , carry out the speciality of stepping research , has formed a service of following respects 凌铮电子技术开发组,主要致力于电子产品的整体解决方案,泛及家庭电器功能应用电器机电类产品大型设备,以及专业设计软件cad cae cam等领域,充分的为工业厂商提供工业设计全流程服务。
The third part has proposed the model of modified bernstein operators , and defined a new function type on which has discussed the convergence of derivative operators of modified bernstein operators and modified bernstein operator on simplex and achieved the smallest terms which guarantee the convergence 第三部分提出了修正bernstein算子的模型,定义了新的函数类,在其上讨论了修正bernstein算子的导算子和单纯形上修正bernstein算子的收敛性,并得到了保证收敛的最小项数。
Because of the reason of history , a large amount of various different database that constructed exist on the network , in a lot of respects , there are several the following respects mainly in their different constructing nature behavior : 1 ) the constructing differently of system structure of the computer , each database is running in the mainframe , the microcomputer is , in work station , pc or embedded system ; 2 ) the constructing differently of basic operating system , the basic operating system of each database system can be unix , windows nt , linux . etc . ; 3 ) the constructing differently of dmbs itself can be all oracle of the database system of relation type , sql server , etc . , it can be a database of different data models too , such as relation , mode , level , network , target of facing , the database of function type ; 4 ) the structure of the data and sometime are constructed differently , each different databases are used and adopt different data structure and sometime expression way systematically 随着internet的发展,网络上存在着大量多样异构的数据库,它们的异构性表现在多个方面,主要有如下几个方面: 1 )计算机体系结构的异构,各个数据库运行在大型机,小型机、工作站、 pc或嵌入式系统中; 2 )基础操作系统的异构,各个数据库系统的基础操作系统可以是unix 、 windowsnt 、 linux等; 3 ) dbms本身的异构,可以是同为关系型数据库系统的oracle 、 sqlserver等,也可以是不同数据模型的数据库,如关系、模式、层次、网络、面向对象,函数型数据库; 4 )数据结构及语义异构,各个不同的数据库应用系统采用不同的数据结构和语义表达方式。
Through the development of more than 40 years , after long - term high produce and steady produce of oil , daqing stride the development stage of mixing the mineral area economy with the city economy , and just develop from the mineral district of singleness mineral type toward the center city of comprehensive function type 经过40多年的开发建设,在原油长期高产稳产之后,大庆迈入了矿区经济与城市经济混存的发展阶段,而且正由单一工矿型矿业城市朝着综合功能型的中心城市发展。
In computer science, a function type (also arrow type or exponential) is the type of a variable or parameter to which a function has or can be assigned or the result type of a higher-order function returning a function.