It is proved by fractal theory that the welded state of every micro zone at welded surface is uneven in the formation process of isothermal superplastic solid-state welding joint.
这也从分形理论的角度证明了在超塑性固相焊接头的形成过程中，焊接面各微区的焊合状态是非均匀性的。
A surface equation of state for ionic surfactant aqueous solutions is also developed by combining perturbation theory and pressure equation.
将微扰理论与压力方程相结合，建立了离子表面活性剂水溶液的表面状态方程。
A surface equation of state for nonionic surfactant aqueous solutions is developed by using perturbation theory and two - dimensional gaseous theory.
应用微扰理论并借鉴二维气体理论的处理方法，建立了非离子表面活性剂水溶液的表面状态方程。
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