The microstructure of a multiphase material was optimized, and property of auxetic performance was obtained, helping to prove the validity of this method.
A surveillance audit is carried out once a year within the three-year validity period and recertification audit will be conducted at the expiry of the three-year period.
These concepts usually only define certain aspects of the legal validity concept, with the disadvantage of limitations on the concept extension and mechanicalness of the concept connotation.
The results of the trial were further analyzed, including students' average scores, the difficulty, discriminability for each item, and the validity and reliability for the whole test.
It is favorable for the increase of the adsorption film thickness by increasing the lyophobic chain.The determination of adsorption film thickness verifies the validity of the modification result.