The Al siting in the ZSM-5 zeolite was investigated by (27)Al 3Q MAS NMR spectroscopy and QM/MM calculations. It was found that the occupation of the framework T-sites by Al and the concentration of Al in these T-sites are neither random nor controlled by a simple rule. They both depend on the conditions of the zeolite synthesis. At least 12 out of the 24… (More)
With SWOT analysis method, advantage and disadvantage, chance and threat of developing productive service in Shenyang will be analyzed by this paper, indicating that developing productive service industry on the basis of High-Tech is significant for upgrading of industrial structure in old industrial bases. On that basis, this paper continues to bring… (More)
showed that it will be more precise and more efficient to fit curve if combining LabVIEW with MATLAB.