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We introduce a diffusion-ZGB model including the diffusion of o and co for the surface catalytic reaction of O2 and co, and eliminate the second-order phase transition naturally.
对于O_2和CO的表面催化反应，我们引入了一个包括O和CO的扩散的不可逆zgb扩散模型，非常自然地消除了二级相变点。
It is proved strictly that this incommensurate phase transition is of second order.
严格证明了该非公度相变是第二类的。
The results show that the laser process in different conditions possesses the characteristics of the first order or the second order phase transition. Laser is a typical non-equilibrium phenomenon.
结果表明，在不同条件下的激光形成过程与平衡相变中一级相变或二级相变的特性相对应，激光是非平衡态有序结构形成的典型现象，并且还展示出非平衡相变的新的特点和规律。
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