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At present, our society is more and more interested in innovation ability. The Chinese government emphasizes higher education institutions' role in forming and developing students' innovation abilities. However, few studies have explored how to improve the innovation ability of higher education students from the academic atmosphere of higher education institutions. This study examines the impact of the academic atmosphere on Chinese graduate students' innovation ability and the chain mediating effect of scientific research self-efficacy and scientific engagement. Three hundred thirteen Chinese postgraduates were investigated with the academic atmosphere scale, scientific research self-efficacy scale, scientific engagement scale, and innovation ability scale. The bootstrap method was used to test the mediating effect. The results show that (1) there is a significant positive correlation between the academic atmosphere and the innovation ability of graduate students, (2) scientific research self-efficacy and scientific engagement play a mediating role between the academic atmosphere and graduate students' innovation ability, and (3) the mediating role includes three paths: the mediating role of scientific research self-efficacy, the mediating role of scientific engagement, and the chain mediating role of scientific research self-efficacy and scientific engagement. The research results provide empirical evidence and reference suggestions for improving the innovation ability of graduate students. Therefore, this study suggests that higher education institutions should adopt more effective academic atmosphere management strategies to create a positive academic atmosphere to improve the scientific research efficacy and engagement of postgraduates and thus solve the practical problem of the low innovation ability of postgraduates. [ABSTRACT FROM AUTHOR]

Cycloaliphatic epoxy resin was modified by phenyl methyl silicone resin to investigate the influence of silicone content on the performance and reliability of epoxy packaged light-emitting diode. The silicone modification of epoxy encapsulants was characterized by transform infrared (FT-IR) spectrophotometer. Rotational rheometer was used to study rheology behavior. Differential scanning calorimetry, thermogravimetric analyses, dynamic mechanical analysis, thermomechanical analyzer were introduced to measure the thermal and mechanical properties. Ultraviolet visible spectrophotometer was utilized to study heat and ultraviolet resistance. In reliability test, scanning acoustic microscope and scanning electron microscope were applied to observe interfacial delamination. Water sorption process was monitored using gravimetric measurement. FT-IR study shows a chemical bonding between hydroxyl group of silicone resin and epoxy resin. With the incorporation of silicone resin, favorable properties were obtained such as higher thermal decomposition temperature, lower equilibrium water sorption, and better heat and UV resistance. Among these systems, 10% silicone modified epoxy resin exhibits the best performance in reliability test. [ABSTRACT FROM AUTHOR]