序列化推荐试图利用用户与物品的历史交互序列,预测下次即将交互的物品。针对序列化推荐中推荐物品依赖于用户的长时间全局兴趣、中时间兴趣还是短时间局部兴趣的不确定性,该文提出了一种基于CW-RNN的多时间尺度序列建模推荐算法。首先...序列化推荐试图利用用户与物品的历史交互序列,预测下次即将交互的物品。针对序列化推荐中推荐物品依赖于用户的长时间全局兴趣、中时间兴趣还是短时间局部兴趣的不确定性,该文提出了一种基于CW-RNN的多时间尺度序列建模推荐算法。首先,该算法引入CW-RNN层,从用户与物品的历史交互序列中抽取多个时间尺度的用户兴趣特征。然后,通过尺度维卷积来建模对不同时间尺度的用户兴趣特征的依赖,生成多时间尺度用户兴趣特征的统一表示。最后,利用全连接层建模统一的多尺度用户兴趣特征和隐式物品特征的交互关系。在MovieLens-1M和Amazon Movies and TV两个公开数据集上的实验结果表明,相比于现有最优的序列推荐算法,该文提出的算法在准确率上分别提升了3.80%和8.63%。展开更多
Temporal geographic information system(t_GIS) is a kind of computer information system that can display,process and analyze the micro_format distribution of temporal_spatial information of real world.It includes both ...Temporal geographic information system(t_GIS) is a kind of computer information system that can display,process and analyze the micro_format distribution of temporal_spatial information of real world.It includes both spatial geographic information and temporal information,and can analyze both the static geographic information and the dynamic geographic information. Three models based on t_GIS for environment dynamics,namely,the mechanism method,the experience method and the mixed method are given. t_GIS based on the environment dynamic model has more new functions than traditional GIS,such as fast I/O,inquiry,static/dynamic display and visible analysis of spatial and temporal sequence information,especially it can display the image of the evolution in the past,current and future environment through the extrapolation method within its defining region.The velocity for analogue display can be accelerated by setting up time_varying_area_function for position and attribute. Dynamic environmental information analysis systems based on t_GIS are applicable to almost all the fields related to management,display and analysis of local environmental dynamic information.For this reason,some considerations to construct distinct information systems have been enumerated in this paper,such as,the analysis information system for terrain evolution,the analysis information system for the condition of water and fertilizer of farmland,analysis and the evaluation information system for ecological environment,and the analysis information system for distribution changes of population of China,etc.展开更多
文摘序列化推荐试图利用用户与物品的历史交互序列,预测下次即将交互的物品。针对序列化推荐中推荐物品依赖于用户的长时间全局兴趣、中时间兴趣还是短时间局部兴趣的不确定性,该文提出了一种基于CW-RNN的多时间尺度序列建模推荐算法。首先,该算法引入CW-RNN层,从用户与物品的历史交互序列中抽取多个时间尺度的用户兴趣特征。然后,通过尺度维卷积来建模对不同时间尺度的用户兴趣特征的依赖,生成多时间尺度用户兴趣特征的统一表示。最后,利用全连接层建模统一的多尺度用户兴趣特征和隐式物品特征的交互关系。在MovieLens-1M和Amazon Movies and TV两个公开数据集上的实验结果表明,相比于现有最优的序列推荐算法,该文提出的算法在准确率上分别提升了3.80%和8.63%。
文摘Temporal geographic information system(t_GIS) is a kind of computer information system that can display,process and analyze the micro_format distribution of temporal_spatial information of real world.It includes both spatial geographic information and temporal information,and can analyze both the static geographic information and the dynamic geographic information. Three models based on t_GIS for environment dynamics,namely,the mechanism method,the experience method and the mixed method are given. t_GIS based on the environment dynamic model has more new functions than traditional GIS,such as fast I/O,inquiry,static/dynamic display and visible analysis of spatial and temporal sequence information,especially it can display the image of the evolution in the past,current and future environment through the extrapolation method within its defining region.The velocity for analogue display can be accelerated by setting up time_varying_area_function for position and attribute. Dynamic environmental information analysis systems based on t_GIS are applicable to almost all the fields related to management,display and analysis of local environmental dynamic information.For this reason,some considerations to construct distinct information systems have been enumerated in this paper,such as,the analysis information system for terrain evolution,the analysis information system for the condition of water and fertilizer of farmland,analysis and the evaluation information system for ecological environment,and the analysis information system for distribution changes of population of China,etc.