This paper analyzes engaging process of clutch for city bus,and designs the rules of engagement for automatic clutch(AC),and calculates control parameters at some characteristic points under the driving cycle such as starting from standstill with first gear,gear-shifting and climbing process.

The acceptance laws of ideological and political education are a kind of developing tendency,including law of acceptor and educator;law of dialectic unity of acceptor s directional expectation and innovative expectation;law of acceptor s dynamics and restraint;and law of mutual restraint of educating and accepting process.

Based on the annotation of coupling between urbanization and eco-environment,the rule curve has been deduced by combining "S" curve of urbanization growth and inverse "U" curve of eco-environment changing,and the coupling rules of China been tested and the causes been explained.

According to the basic coupling characteristics and temporal rule between regional urbanization and eco-environment,the coupling rules between urbanization level and "three waste discharges" in Jiangsu have empirically been tested and the mechanisms have theoretically been explained.

In order to keep away from the deficiency of ESD theory and the unfit test tools for ESD radio field,a homemade PCB with certain function is used as the electronic system under test in this paper,and try to research the energy coupling rules between the system and ESD through the electrical parameter of the system under test and electrostatic discharge voltage.

The investigation includes microelement background value and combination law of road dusts in element character of geochemistry.