当前主流的Web图像检索方法仅考虑了视觉特征,没有充分利用Web图像附带的文本信息,并忽略了相关文本中涉及的有价值的语义,从而导致其图像表达能力不强。针对这一问题,提出了一种新的无监督图像哈希方法--基于语义迁移的深度图像哈希(se...当前主流的Web图像检索方法仅考虑了视觉特征,没有充分利用Web图像附带的文本信息,并忽略了相关文本中涉及的有价值的语义,从而导致其图像表达能力不强。针对这一问题,提出了一种新的无监督图像哈希方法--基于语义迁移的深度图像哈希(semantic transfer deep visual hashing,STDVH)。该方法首先利用谱聚类挖掘训练文本的语义信息;然后构建深度卷积神经网络将文本语义信息迁移到图像哈希码的学习中;最后在统一框架中训练得到图像的哈希码和哈希函数,在低维汉明空间中完成对大规模Web图像数据的有效检索。通过在Wiki和MIR Flickr这两个公开的Web图像集上进行实验,证明了该方法相比其他先进的哈希算法的优越性。展开更多
Based on the methods of acquaintance cache and group-based intelligent forwarding of service recommendations,a novel group-based active service(GAS) protocol for migrating workflows was proposed.This protocol did not ...Based on the methods of acquaintance cache and group-based intelligent forwarding of service recommendations,a novel group-based active service(GAS) protocol for migrating workflows was proposed.This protocol did not require service requesters to discover services or resources.The semantic acquaintance knowledge representation was exploited to describe service groups and this semantic information was used to recommend service to respective clients.The experimental results show that the new protocol proposed offers better performance than other protocols in terms of first-response-time,success-scope and ratio of success-packet-number to total-packet-number.When the number of service request packet is 20,the first-response-time of GAS protocol is only 5.1 s,which is significantly lower than that of other protocols.The success-scope of GAS protocol is 49.1%,showing that GAS protocol can effectively improve the reliability of mobile transactions.And the ratio of success-packet-number to total-packet-number of GAS protocol is up to 0.080,which is obviously higher than that of other protocols.展开更多
文摘当前主流的Web图像检索方法仅考虑了视觉特征,没有充分利用Web图像附带的文本信息,并忽略了相关文本中涉及的有价值的语义,从而导致其图像表达能力不强。针对这一问题,提出了一种新的无监督图像哈希方法--基于语义迁移的深度图像哈希(semantic transfer deep visual hashing,STDVH)。该方法首先利用谱聚类挖掘训练文本的语义信息;然后构建深度卷积神经网络将文本语义信息迁移到图像哈希码的学习中;最后在统一框架中训练得到图像的哈希码和哈希函数,在低维汉明空间中完成对大规模Web图像数据的有效检索。通过在Wiki和MIR Flickr这两个公开的Web图像集上进行实验,证明了该方法相比其他先进的哈希算法的优越性。
基金Project(60573169) supported by the National Natural Science Foundation of China
文摘Based on the methods of acquaintance cache and group-based intelligent forwarding of service recommendations,a novel group-based active service(GAS) protocol for migrating workflows was proposed.This protocol did not require service requesters to discover services or resources.The semantic acquaintance knowledge representation was exploited to describe service groups and this semantic information was used to recommend service to respective clients.The experimental results show that the new protocol proposed offers better performance than other protocols in terms of first-response-time,success-scope and ratio of success-packet-number to total-packet-number.When the number of service request packet is 20,the first-response-time of GAS protocol is only 5.1 s,which is significantly lower than that of other protocols.The success-scope of GAS protocol is 49.1%,showing that GAS protocol can effectively improve the reliability of mobile transactions.And the ratio of success-packet-number to total-packet-number of GAS protocol is up to 0.080,which is obviously higher than that of other protocols.
