The mechanism of Z - scan technique is introduced. It 's application to measuring nonlinear refractive index and nonlinear absorption coefficient for nonlinear optical medium is made.
介绍了Z -扫描技术的基本原理，以及Z -扫描技术在测量非线性光学介质的非线性折射率、非线性吸收系数等方面的应用。
In addition, the medium utility helicopter Z-15 co-developed by China and France recently has successfully completed its maiden flight in Marseille, France.
另外，由中法合作研制的Z一五中型直升机日前在法国马赛成功完成首飞。
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