For the four catalytic materials ( cuznal , wc , zro2 - nio , lanio3 ) , gas chromatography tests show that the decomposition efficiency of methanol increase with the increasing of methanol concentration in condition of 60 对cuznal 、 wc 、 zro _ 2 - nio 、 lanio _ 3四种材料进行了气相色谱分解甲醇效率测试,结果表明, 60下随着甲醇浓度的变大,催化剂对甲醇的分解率变大。
In this thesis , we follow the idea of the beamlet - domain wave field extrapolation methods to construct localized propagators . through comparative study of signal decomposition efficiency using different representation schemes , we select two groups of basic functions with simple expressions and good localization properties for wave field decomposition , propagation and imaging 本论文通过对wft 、小波基、小波包,以及相关的框架理论等的分析比较,选择了两组形式简单,且具有适宜于波场外推特性的基本函数集合来进行波场分解、传播及偏移成像问题的研究。