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Phenyltrimethoxysilane as a Si source can significantly slow down the crystallization process for SAPO-34 synthesis, leading to the formation of agglomerated nanocrystals (<100 nm). The obtained nanosized SAPO-34 shows enhanced catalytic stability in methanol-to-olefin conversion under industrially relevant conditions.
Extended Binary Phase Shift Keying (EBPSK) modulation with very high spectra efficiency is a hot research problem in the field of communication. This paper proposes an optimum design method of digital filters in EBPSK demodulation aiming at very tiny waveform difference, which is based on the minimum bit error rate (BER) criteria. Simultaneously, the inter… (More)
In this research, cellulose aliphatic esters (CEs) were synthesized efficiently in an N, N-dimethylacetamide/lithium chloride system (DMAc/LiCl) with vinyl esters (VEs, number of carbon atoms ranging from 4 to 12) as acylation reagent and 1,8-diazabicyclo[5,4,0]undec-7-ene (DBU) as catalyst. The structures and properties of the products have been… (More)