Ga(ClO4)3-catalyzed reaction of 1,2-aryldiamines and α-bromoketones to afford 2-substituted quinoxalines in good yields......

Currently sparse signal reconstruction gains considerable interest and is applied in many fields. In this paper, a simil......

1 Introduction Since its first discovery in 1992[1,2], ordered mesoporous silica material with large pore size, high sur......

Wettability of acid volcanic reservoir rock from the Hailar Oilfi eld,China,was studied with crude oils of different aci......

Graphite-like amorphous carbon film was fabricated by unbalanced magnetron sputtering technique.Raman spectroscopy,atomi......

A nonlinear model of a warm-core ring is presented here. The model treats the warm-core ring as a confined lens of flui......

根据预应力筋孔道和预应力筋的匹配要求，计算确定常用预应力筋重心偏移孔道中心的距离。在此基础上，对一孔布置6股钢绞线和12股钢绞......

针对传统环锭纺纱机存在纺纱加捻三角区导致纱线毛羽较多的现状，介绍了缆型纺纱的原理，分析了缆型纺纱中分割辊直径、分割槽宽度对66......