threshold excitation

The phenomenon of electron resonance near the excitation threshold and its mechanism are discussed.

在激发阈值附近，发现了分波共振现象，并对这个现象产生的机制作了分析。

Propofol may decrease the excitation threshold, and increase the level of convulsive seizure under the same ECT parameters, but may have the potential to induce epileptic seizure.

丙泊酚可能会使兴奋阈值下调，相同治疗参数引起的痉挛发作较好，但丙泊酚有诱发癫痫样发作的可能。

In this case, many interesting phenomena of excitation and photoionization can be observed, for instance, muti-photon ionization, above threshold ionization, tunnel ionization and so on.

这样，我们就可以观察到一些新的现象，如多光子过程，阈上电离，隧道电离等。