The preparation, types and its application in catalysis of high dispersing, supported, ultrafine particle catalysts are reviewed. The applied prospects of these catalysts is looked.
本文综述了高分散负载型超细粒子催化剂的制备及其在催化中应用的现状，展望了该类催化剂的应用前景。
With the increasing of soil loss, the sorting coefficient for soil particle diameter of a layer decrease in different types of land utilization.
随着土壤流失程度的增大，流域不同土地利用状况下的A层土壤颗粒粒径分选系数降低。
The influences of impeller types, baffle configurations and gas sparger on critical speed of floating particle in an agitated vessel were investigated.
探讨了搅拌桨型、挡板和气体分布器等结构因素及气体流量、颗粒质量分数等工艺因素对下沉颗粒三相体系临界搅拌转速的影响。
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