Secondly , alterability of sampling frequency was required in the work of this paper 其次，本课题还要求采样率可变。
2.
Uenmis is developed on the basis of the alterability of system , the software engineering theory and the current technology of nmis system development . it is designed by adopting the method of structural designed , structuring and modularization Uenmis系统设计和开发从系统的变更性入手，以软件工程理论和现有的mis系统开发技术为指导，采用sd方法设计，层次结构法和模块法相结合的开发方法。
3.
According with the specialty of the grinding productive line , the advanced agility and credible plc integrated control system is designed to in place of relay control system that owns bad reliability and bad alterability . the environment is improved . it also meets the tidal current of material transportation controlling , tally with the up trend of the science and technology in the sugar - refinery 为解决糖厂压榨提汁生产线的传统继电控制系统的可靠性与可更改性差，操作工人工作环境极差等缺点，结合糖厂科技发展的趋势与当前物料输送线多采取集中控制的潮流，设计采用了先进、灵活、可靠的plc控制技术对压榨提汁生产线进行集成控制。
