摘要：In this study,a step-scheme photocatalytic system comprising one-dimensional In_(2)O_(3)nanorods and two-dimensional ZnIn_(2)S_(4)nanosheets was developed for the catalytic photofixation of *** effects of the combination of In_(2)O_(3)with ZnIn_(2)S_(4)on the crystallinity,microstructure,optical absorption,and charge transfer behavior of the In_(2)O_(3)/ZnIn_(2)S_(4)hybrid photocatalysts were *** from the synergistic effects of the photogenerated vacancies and a step-scheme charge separation mechanism,the In_(2)O_(3)/ZnIn_(2)S_(4)hybrid photocatalyst exhibited significantly enhanced catalytic activity compared to those of bare In_(2)O_(3)and pure ZnIn_(2)S_(4),and an optimized 50 wt%In_(2)O_(3)/ZnIn_(2)S_(4)hybrid sample was found to exhibit superior catalytic activity for the photofixation of N2,fixing 18.1±0.77 mg·L-1 of ammonia after exposure to simulated sunlight for 2 ***,the results of trapping experiments and electron paramagnetic resonance investigation to identify the active species confirmed that the catalytic nitrogen photofixation performance was highly correlated with the presence of·CO_(2)-radicals rather than photogenerated electrons,especially when methanol was used as a hole *** summary,the reported In_(2)O_(3)/ZnIn_(2)S_(4)hybrid photocatalysts exhibit both stability and high activity for the photofixation of N_(2),making them promising catalysts for sunlight-driven artificial N_(2)fixation.

摘要：LabVIEW是一种用图标代替文本行创建应用程序的图形化编程语言。它采用的数据流的思想和图形化的编程语言,极大地提高了编程的效率,从而能够方便快捷地设计虚拟仪器。设计了一种基于LabVIEW的虚拟同步积分器,利用LabVIEW软件提供的控件和函数,设计了两种虚拟同步积分器的信号处理方法,即直接法和间接法。虚拟同步积分器可用于以同步积分器及微弱信号检测为核心内容的实验教学,不仅能在一定程度上缓解实验教学的仪器压力,同时能够加深学生对理论知识的理解。随着虚拟实验技术的成熟,以虚拟仪器为基础构建的新型实验室将有助于实现开放的实验教学。

摘要：目的了解广州市女大学生对乳房自检的认知现状,为政府及高校开展相应的健康教育提供参考依据。方法采用自行设计的问卷对抽取的广州市多所高校(广东药科大学、华南师范大学、广州医科大学、广州大学、华南理工大学)女大学生进行调查。结果共调查395名女大学生,年龄分布集中于21~23岁占67.85%。调查对象中357名占90.38%表示从未接受过乳房自检指导,大部分不懂得乳房自检的正确的视诊及触诊方法、乳房自检的最佳时间及自检的间隔时间。结论广州市女大学生乳房自检知识认知度偏低,有学习乳房自检的需求,但是缺乏适当的途径。要提高女大学生的乳房健康意识需要从学校入手开展健康教育和健康促进活动。