The solutions of fault detection for rotary rectifier in multi-phase brushless excitation system are always technical difficulties, and there is a lack of perfect solutions at present.
多相无刷励磁系统旋转整流器的故障检测一直以来是个技术难题，没有很好的解决方案。
Domestic and foreign scholars have carried out a lot of researches on gas condensate reservoir fluid phase and the percolation theory, but the study of micro-seepage mechanism is relatively lack.
国内外学者对凝析气藏流体相态及渗流理论已进行了大量研究，但对微观渗流机理的研究相对较少。
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