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：阀门的阀体加工涉及到多台机床、反复装夹定位和多个工序,这些复杂的步骤常常导致生产质量不够稳定,生产效率也难以达到自动化的要求,面对这些挑战,在现有多台机床以及配置有复合夹具和多工位转轴的基础上,利用自动平行料仓和自动控制技术,开发了一条可以通过两次装夹完成多工序自动化加工的生产线,本文将重点讨论这条自动化生产线的设计与应用,结合当今工业自动化技术的发展,分析其在阀体生产中的突出优势,通过对设计思路、技术方案和具体应用的详细说明,展示了该技术在提高生产效率、降低生产成本和提升产品质量方面的显著作用,最终,本文通过实际案例证明了这种自动化生产线的可行性和广泛应用前景。

摘要：以苦瓜为原料，研究苦瓜多糖的提取工艺．选择提取温度、提取时间、料水比和提取次数4个因素，在单因素试验的基础上进行L9（3^4）正交试验设计，确定苦瓜多糖提取的最优工艺条件，并采用苯酚一硫酸法测定所提取的苦瓜多糖的纯度．结果表明：在提取温度为90℃、提取次数为2次、料水比为1：25（g／mL）、提取时间为4h的条件下，提取的效果最佳；在该条件下苦瓜粗多糖的提取率为9．84％，纯度为65．3％．