This method changes the former fixed mode only based on the textbook of course design.

该方法克服了以往单纯使用课程设计教材、或类似的模拟设计题材的固定模式.

Installed systems should operate well in a fixed mode, should be easy to control automatically, or should require only relatively infrequent adjustment by maintenance staff during each year.

系统需在一个设定好的模式下运行，并且易于自控，或者仅需维护人员每年进行相对较少的调整。