基于组件的三层分布式应用系统的设计，适合于业务逻辑经常变化的大型应用系统的开发-component-based distributed applications to the three-tier system design, suitable for frequent business logic changes in the large-scale application development system

1）动态加载中间（2）规范化中间层接口 （3）解释本地文件系统（4）基于数据库的数据提供（5）数据库设计（6）优化数据提供逻辑（7）程序框架结构图-1) dynamic load intermediate (2) standardization middle layer interface (3), explaining the local file system (4) database based on the data provided (5) Database Design (6) pr

数字逻辑课程设计，基于EWB软件设计一个数字电子时钟，要求能实现十二进制和二十四禁止的转换，有秒时分的显示，用74160实现的-Digital logic design, EWB-based software to design a digital electronic clock, the requirements to achieve 10 and 24 the prohibition of binary conversion, the second night of the show, w