In this article, the optical emission spectrum researches have been carried out in bi-directional pulsed DBD with a needle-plate electrode in N_2/H_2O mixed gas at atmospheric pressure, and the main results presented in the dissertation have been summarized as follows:1.

Based on the McNeal cable model,taking the myelinated nerve fiber with limited length as the research object,this paper investigated the possibility and regularity of nerve conduction block with a monopolar point electrode using asymmetry biphasic pulses.

The aim of this study is to investigate theoretically the possibility for activation of small mammalian myelinated nerve fibers without activating larger ones when stimulating a nerve fiber bundle with a monopolar point electrode using biphasic pulses,which can reduce the electrochemical damage resulted from stimulation pulses to nerve fibers.

Selective stimulation of mammalian myelinated nerve fibers is studied using biphasic pulses.

It is introduced a novel method for preparing Ni-Co/Al_2O_3 nano-composite coating by using a bidirectional pulse electrodeposit technique,and the microstructure and properties of Ni-Co/Al_2O_3 nano-composite coating was studied by XRD、SEM/EDS、TEM and property test.