In the meantime, the cost model of the query cost view selection problem and the process of materialized views selection are presented.
同时给出了查询代价视图选择问题的代价模型和实视图选择的过程。
With a view to tackling the tough problem in Yamamai cocoon reeling, a new reeling process is established by wet heat treatment prior to cocoon cooking and selection of new cocoon cooking chemicals.
针对天蚕茧解舒难的问题，根据人工饲育天蚕茧的特性，采用煮茧前热湿处理，并筛选出煮茧新药剂，确立了天蚕茧解舒新工艺。
With a view to tackling the tough problem in Yamamai cocoon reeling, a new reeling process is established by wet heat treatment prior to cocoon cooking and selection of new cocoon cooking chemicals.
针对天蚕茧解舒难的问题，根据人工饲育天蚕茧的特性，采用煮茧前热湿处理，并筛选出煮茧新药剂，确立了天蚕茧解舒新工艺。
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