双核有机金属化合物的光化学反应探析

有机金属化合物是指分子中至少含有一个金属-碳键（M-C键）的化合物,包括含M-C σ-键、M-Cnπ-键、ηn-M-Cn大π-键的化合物.双核金属-金属碳键的有机化合物的光化学反应包括光诱导金属-金属键的断裂、配体的离解与取代、光化学插入反应、光诱导异构化反应、歧化反应等.     

针对我国金属有机化学进展探究

现如今随着科学技术的不断发展和交叉学科的不断出现,金属有机化学作为一种新兴学科在我国已经逐渐发展起来,该文将对碳金属键化合物的形成,性质及应用,文中还将针对我国金属有机化学进展进行了探究叙述.     

光行差对恒星时的影响分析

光行差是观测者的运动速度与星光的运动速度相结合(相对运动)产生的一种光学效应。各种光行差对恒星的观测均会产生影响,本文阐述了周日光行差和周年光行差对恒星坐标(主要是赤经)的影响,并进一步分析光行差对地方恒星时产生的影响。     

钛基体Ti4O7阳极在高盐体系下的电催化降解性能

针对高盐废水成分复杂、可生化性差等处理难题，采用等离子喷涂技术制备一种新型钛基体亚氧化钛电极——Ti₄O₇电极，对该电极性能进行全面评价，解释电极的失效机理，并将其应用于高盐体系下的有机物电催化降解过程，考察不同因素对降解效果的影响。结果表明：Ti₄O₇电极具备丰富的孔洞结构、较高的析氧过电位、优异的导电性能和良好的稳定性。高盐体系下，电流密度的提高会促进酸性红G染料降解，但单位能耗会显著增加；含盐量和pH值对降解效果的影响甚微，这也得益于亚氧化钛材料电极的稳定性能；在电流密度为15 mA/cm²、含盐量为1%、初始pH值为8.5时，降解效果最佳，120 min内脱色率为99.91%,化学需氧量(COD)去除率为71.88%。Ti₄O₇电极在高盐废水的电化学处理领域有良好的应用前景。     

Enhanced Biological Phosphorus Removal in Anaerobic/Aerobic Sequencing Batch Reactor Supplied with Glucose as Carbon Source

Phosphorus removal performance in an aerobic/aerobic sequencing batch reactor （SBR） supplied with glucose as carbon source was investigated. It was found that there was no phosphate release concomitant with the storing of poly-β-hydroxyalkanoate （PHA） during the anaerobic phase. Whereas, glycogen was soon built up followed by rapid consumption, at the same time, glucose was depleted rapidly. Based on the analysis of different fractions of phosphorus in activated sludge, the relative ratio of organically bound phosphorus in sludge changed at the end of anaerobic and aerobic phases. The ratios were 45.3% and 51.8% respectively. This showed that the polyphosphate broke down during the anaerobic phase to supply part of energy for PHA synthesis. The reason why there was no phosphate release might be the biosorption effect of extracellular exopolymers （EPS）. It was also proved by the analysis of EPS with scanning electron microscopy （SEM） combined with energy dispersive spectrometry （EDS）. The phosphorus weight percentage of EPS at the end of anaerobic phase was 9.22%.     

基于ITD与改进MCKD的滚动轴承故障诊断方法

为研究滚动轴承早期微弱故障特征提取以及最大相关峭度解卷积(MCKD)的参数对诊断效果的影响,提出了一种基于固有时间尺度分解(ITD)与改进最大相关峭度解卷积(IMCKD)相结合的轴承早期微弱故障诊断方法(ITD-IMCKD).首先,运用ITD算法对故障信号进行分解,按峭度相关系数准则重构信号;其次,利用灰狼优化(GWO...