To solve the unbalanced data problems of learning models for semantic concepts, an optimized modeling method based on the posterior probability support vector machine （PPSVM） is presented. A neighborbased posterior ...To solve the unbalanced data problems of learning models for semantic concepts, an optimized modeling method based on the posterior probability support vector machine （PPSVM） is presented. A neighborbased posterior probability estimator for visual concepts is provided. The proposed method has been applied in a high-level visual semantic concept classification system and the experiment results show that it results in enhanced performance over the baseline SVM models, as well as in improved robustness with respect to high-level visual semantic concept classification.展开更多
To meet the increasing demand of national spatial database infrastructure construction and application, a concept model of China's coastal zone scientific data platform is established based on the information feat...To meet the increasing demand of national spatial database infrastructure construction and application, a concept model of China's coastal zone scientific data platform is established based on the information feature analysis of a compound dataset, consisting of remote sensing data and conventional data. Based on this concept model, the detailed logical database structure and the storage strategy of remote sensing data and their metadata using ArcSDE are designed. The complicated technology of multisources data combination in this research is crucial to the future coastal zone and offshore database construction and practical running, which will provide intelligent information analysis and technological service for coastal zone and offshore investigation, research, development and management.展开更多
BCDM(Bitemporal concept data model)是一种同时支持事务时间和有效时间的双时态数据模型,该模型不仅反映了客观事物的数据变迁情况,而且也记录了数据对象在数据库中的各种操作历史。以医院信息管理系统HIS的电子病历为例,介绍了BCDM...BCDM(Bitemporal concept data model)是一种同时支持事务时间和有效时间的双时态数据模型,该模型不仅反映了客观事物的数据变迁情况,而且也记录了数据对象在数据库中的各种操作历史。以医院信息管理系统HIS的电子病历为例,介绍了BCDM双时态医疗数据的优化存储技术,分析了BCDM双时态医疗数据的增加、删除和修改等操作语义,进一步,为这些操作语义设计了相应的面向医护人员的数据更新算法。实际应用表明,该算法的可行性和有效性,从而为医护人员提供了简捷透明的BCDM双时态医疗数据操作方式。展开更多
基金Sponsored by the Beijing Municipal Natural Science Foundation(4082027)
文摘To solve the unbalanced data problems of learning models for semantic concepts, an optimized modeling method based on the posterior probability support vector machine （PPSVM） is presented. A neighborbased posterior probability estimator for visual concepts is provided. The proposed method has been applied in a high-level visual semantic concept classification system and the experiment results show that it results in enhanced performance over the baseline SVM models, as well as in improved robustness with respect to high-level visual semantic concept classification.
基金the“863”Marine Monitor of Hitech Research and Development Program of China under contract No.,5 2003AA604040 a, 2002AA639640.
文摘To meet the increasing demand of national spatial database infrastructure construction and application, a concept model of China's coastal zone scientific data platform is established based on the information feature analysis of a compound dataset, consisting of remote sensing data and conventional data. Based on this concept model, the detailed logical database structure and the storage strategy of remote sensing data and their metadata using ArcSDE are designed. The complicated technology of multisources data combination in this research is crucial to the future coastal zone and offshore database construction and practical running, which will provide intelligent information analysis and technological service for coastal zone and offshore investigation, research, development and management.
文摘BCDM(Bitemporal concept data model)是一种同时支持事务时间和有效时间的双时态数据模型,该模型不仅反映了客观事物的数据变迁情况,而且也记录了数据对象在数据库中的各种操作历史。以医院信息管理系统HIS的电子病历为例,介绍了BCDM双时态医疗数据的优化存储技术,分析了BCDM双时态医疗数据的增加、删除和修改等操作语义,进一步,为这些操作语义设计了相应的面向医护人员的数据更新算法。实际应用表明,该算法的可行性和有效性,从而为医护人员提供了简捷透明的BCDM双时态医疗数据操作方式。
