基于深度学习SSD_MobileNet的海洋养殖水面死鱼识别研究

海洋渔业养殖过程中的关于死鱼及时发现问题关系到海洋渔业养殖的成鱼率,不能及时的发现死鱼会引起海洋污染,也会引发更大数量的死鱼。基于人工智能深度学习物体识别SSD_MobileNet模型实现针对海洋养殖中单条死鱼和多条死鱼的识别,给出了SSD_MobileNet的死鱼识别模型运行的工程架构,并且通过实验结果证明了提出方法的有效性和可行性。

Syntheses,crystal structures,and catalytic properties of three zinc(Ⅱ),cobalt(Ⅱ)and nickel(Ⅱ)coordination polymers constructed from 5⁃(4⁃carboxyphenoxy)nicotinic acid

Three zinc(Ⅱ),cobalt(Ⅱ),and nickel(Ⅱ)coordination polymers,namely[Zn(μ^(3-)cpna)(μ-dpea)_(0.5)]_(n)(1),[Co(μ^(3-)cpna)(μ-dpey)_(0.5)]_(n)(2),and[Ni(μ^(3-)cpna)(μ-dpey)_(0.5)(H_(2)O)]_(n)(3),have been constructed hydrothermally using H_(2)cpna(5-(4-carboxyphenoxy)nicotinic acid),dpea(1,2-di(4-pyridyl)ethane),dpey(1,2-di(4-pyridyl)ethylene),and zinc,cobalt,and nickel chlorides at 160℃.The products were isolated as stable crystalline solids and were characterized by IR spectra,elemental analyses,thermogravimetric analyses,and single-crystal X-ray diffraction analyses.Single-crystal X-ray diffraction analyses revealed that three compounds crystallize in the triclinic system,space group P1.Compounds 1-3 show 2D layer structures.The catalytic activities in the Knoevenagel condensation reaction of these compounds were investigated.Compounds 1 and 2 exhibit effective catalytic activities in the Knoevenagel condensa-tion reaction at room temperature.For this reaction,various parameters were optimized,followed by the investiga-tion of the substrate scope.CCDC:2335676,1;2335677,2;2335678,3.

深水井环空压力管控研究进展

系统介绍了目前深水固井环空压力管控的技术发展,包括提高套管强度、消除卡套、释放滞留压力、平衡膨胀体积和阻断传热等,以及12种控制技术的工作原理、关键设备、应用和关键技术指标,分析其优缺点,探讨其发展趋势,对深水油气井安全保障提供一定指导。