苎麻原麻/精干麻纤维及其复合材料

测试分析苎麻原麻、精干麻的基本性能，对比分析苎麻原麻、精干麻的不饱和树脂基复合材料的力学性能。结果表明，苎麻的果胶率对苎麻纤维增强复合材料的界面影响很大，果胶含量高，复合材料的机械性能差。同时。现有的脱胶工艺对苎麻纤维强力损伤很大，需改进。     

Pulmonary Diffuse Airspace Opacities Diagnosis from Chest X-Ray Images Using Deep Convolutional Neural Networks Fine-Tuned by Whale Optimizer

Wireless Personal Communications - The early diagnosis and the accurate separation of COVID-19 from non-COVID-19 cases based on pulmonary diffuse airspace opacities is one of the challenges facing...     

冷凝水回收的在线监测及自动控制

介绍了密封式高温冷凝水回收系统采用在线监测及自动控制，不仅可使用炉水质得到可靠保证，而且还减轻劳动强度，方便操作，提高了经济效益。     

山东平邑梨方沟金矿床地质特征及找矿方向

梨方沟金矿位于燕甘断裂西侧，铜石杂岩体南部成矿带，矿床成因与地层构造及岩浆岩有关，找矿标志突出，根据矿床分布规律，可确定找矿方向。     

An Ullmann C?O Coupling Reaction Catalyzed by Magnetic Copper Ferrite Nanoparticles

Herein, an efficient method for the Ullmann C O coupling reaction between various kinds of phenols and aryl halides, including amino, ketone, cyano, methyl, methoxy, fluoro, chloro and bromo derivatives, is described. The catalyst used, copper ferrite (CuFe₂O₄) nanoparticles, are easily made, air‐stable, and of low cost. The catalyst can be recycled easily just by using an external magnet. Even in the presence of sensitive substituents, the reaction proceeds successfully to provide the desired products in high yields without protection of other functional groups.