A new polymer-bonded β-cyclodextrin was prepared from chloromethylated styrene-divinylbenzene copolymer,sodium salt of β-cyclodextrin (β-CD), KI,and (C4H9)4N
使用2011-10-10全球随纬度均匀分布的10个IGS测站的观测数据,分别采用非组合、组合PPP(precise point positioning)模型进行定位解算,详细对比分析了两种PPP模型的静态和动态定位精度和收敛速度,以及ZPD估计精度。实验结果表明,两种PPP模型均可实现水平方向mm~cm级,高程1~3cm的静态定位精度;水平方向1~3cm,高程方向4cm左右的模拟动态定位精度,非组
The ac impedance of Nb-doped semiconducting(BaO.72PbO.28)TiO3 ceramics implanted with copper ions(200keV,6×1015 and 1×1017 ions/cm2) in the temperature range