铜离子交换分子筛上NO吸附的IR光谱及TPD研究

采用原位IR光谱及TPD技术研究了NO在铜离子交换分子筛上各种表面物种的生成及脱附,并与NO在Cu-ZSM-5上的分解反应性能相关联,考察了Cu-ZSM-5反应活性高的原因及O₂的生成机理。NO的吸附状态随分子筛母体种类及铜离子交换度的不同而变化,交换度较高的ZSM-5催化剂上容易形成NO-3物种,该物种对NO分解及O₂的生成具有重要作用。     

Comparative analysis of temporal-spatial and time-frequency features for pattern recognition of φ-OTDR

The phase-sensitive time-domain reflectometer [φ-OTDR) has been popularly used for events detection over a long period of time. In this study, the events classification methods based on convolutional neural networks [CNNs) with different features, i.e., the temporal-spatial features and time-frequency features, are compared and analyzed comprehensively inφ-OTDR. The developed CNNs aim at distinguishing three typical events: wind blowing, knocking, and background noise.The classification accuracy...     

[Cu2(Gly-GlyO)2(4,4''''-bpy)(OH)2]·10H2O配合物的合成、晶体结构和分子结构研究

合成了以4,4'-bpy为中继基、Gly-GlyO为螯环的新型双核铜配合物.经X射线单晶结构分析确定该配位化合物晶体的化学式为[(H2NCH2CONHCH2COO)Cu(OH)(C10H8N2)Cu(OH)-(H2NCH2CONHCH2COO)]·10H2O.晶体属三斜晶系,Pl空间群,晶胞参数a=0.712 4(2)nm,b=1.140 5(10)nm,c=1.143 4(10)nm,α=67.55°,β=79.02°,γ=77.97°,V=0.834(3)nm3,Z=1.最终一致性因子R为0.072 7.