in the present work, b-zsm-5 zeolite membranes were synthesized on porous tubular α-alumina supports by several subsequence in situ crystallization hydrothermal treatments. the tio2- bohmite and ɣ- alumina intermediate layers were applied to improve the lattice matching between zeolite layer and the support. the uniform membrane intermediate layers with low permeation resistance were prepared o...

The design of programs for broadcast disks which incorporate real time and fault tolerance requirements is considered A generalized model for real time fault tolerant broadcast disks is de ned It is shown that designing programs for broadcast disks speci ed in this model is closely related to the scheduling of pinwheel task systems Some new results in pinwheel scheduling theory are derived whic...