A method is introduced that is applied to drawing up the logical chain diagram of a system and distinguishing the faults in hydraulic systems by the logical chain diagram.

To form logic chains yo transform knowledge as ability,so to explore innovation in cheimstry education;

Some practical examples in undergraduate chemistry teaching practice were applied to study how to guide students to build one dimension logic chains , two dimension logic network as well as three dimension logic space between knowledge and ability, respetively.

After analyzed characteristic of VS in Grid environment,subsystem s struction and majoy technology are illustrated,finally a kind of VS subsystem prototype is provided and it is realized based on link-logic to file in a grid service system.

The typical process flow of initial terminal of product oil pipelines are discussed and typical SCADA logic flow diagram of the initial terminal's oil delivery system is studied.