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In the last several years hundreds of thousands of SSDs have been deployed in the data centers of Baidu, China's largest Internet search company. Currently only 40\% or less of the raw bandwidth of the flash memory in the SSDs is delivered by the storage system to the applications. Moreover, because of space over-provisioning in the SSD to accommodate(More)
This paper proposes a mental model approach to support category hierarchy maintenance on sellers' self-input items in e-commerce websites. We conduct co-occurrence analysis between sellers' self-input items and existing website category items, and use Hierarchical Clustering Analysis to explore hierarchical structure and the association relationships hidden(More)
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