The booming growth of the Internet provides us a great deal of information resource. In this paper, we create a text filtering model based on VSM. In this model,Web text mming is an efficient technique,which discovere...The booming growth of the Internet provides us a great deal of information resource. In this paper, we create a text filtering model based on VSM. In this model,Web text mming is an efficient technique,which discoveres valuable and potential knowledge from those unstructured texts. In this paper,we use VSM as the description of Web text and give a feature subset algorithm which is based on the Genetic Algorthm. This algorithm can greatly improve the efficiency of dealing with Web texts and give much better way to classify and cluster the texts. Our experiments show that this method is active well in feature dimension reduction.展开更多
The minimal unsatisfiability-preserving sub-TBoxes（MUPS）of an unsatisfiable class C identified by two equivalent transformations,axiom splitting and ontology reduction,and three discrimination rules comprise minimal...The minimal unsatisfiability-preserving sub-TBoxes（MUPS）of an unsatisfiable class C identified by two equivalent transformations,axiom splitting and ontology reduction,and three discrimination rules comprise minimal sets of axioms which support the unsatisfiability.Discrimination rules classify all MUPS into three types based on the transitivity of unsatisfiability,fully dependent on C（MUPSf）,transitively dependent on C（MUPSt）and uncertainly dependent on C（MUPSu）.The results show that the number of MUPSt is frequently a large fraction of the total number of all MUPS,but only MUPSf catches the root error of C.Modelers and domain experts conduct iterative repair work effectively,considering only MUPSf in each iteration.The classification shows the significance for the evaluation of the quality of ontologies from the perspective of maintenance and for repair work.展开更多
如果你需要数字彩色图像但又负担不起平板式扫描仪,那么请考虑一下Ultima International的ViewScan Color 16M。售价为149美元的ViewScan以每英寸高达1600点图形分辨率发送24位彩色图像,放在手掌中倍感舒适。 安装该扫描仪和使用它一样...如果你需要数字彩色图像但又负担不起平板式扫描仪,那么请考虑一下Ultima International的ViewScan Color 16M。售价为149美元的ViewScan以每英寸高达1600点图形分辨率发送24位彩色图像,放在手掌中倍感舒适。 安装该扫描仪和使用它一样容易。展开更多
去年12月上旬为期四天的International Electron Devices Meeting(IEDM)年会上,展示了比“Deep Space Nine”更具艺术性的电子技术。若是你喜爱的半导体设备在1995年变得更快、更小或更便宜了,那它一定会出现在提交会议的220多份前沿研...去年12月上旬为期四天的International Electron Devices Meeting(IEDM)年会上,展示了比“Deep Space Nine”更具艺术性的电子技术。若是你喜爱的半导体设备在1995年变得更快、更小或更便宜了,那它一定会出现在提交会议的220多份前沿研究论文中。 一些论文介绍了以1Gb DRAM芯片取代16Mb芯片的技术。当传统的DRAM电容器变小时。展开更多
文摘The booming growth of the Internet provides us a great deal of information resource. In this paper, we create a text filtering model based on VSM. In this model,Web text mming is an efficient technique,which discoveres valuable and potential knowledge from those unstructured texts. In this paper,we use VSM as the description of Web text and give a feature subset algorithm which is based on the Genetic Algorthm. This algorithm can greatly improve the efficiency of dealing with Web texts and give much better way to classify and cluster the texts. Our experiments show that this method is active well in feature dimension reduction.
基金The Science and Technology Development Program of Tianjin(No.06YFGZGX05900)
文摘The minimal unsatisfiability-preserving sub-TBoxes（MUPS）of an unsatisfiable class C identified by two equivalent transformations,axiom splitting and ontology reduction,and three discrimination rules comprise minimal sets of axioms which support the unsatisfiability.Discrimination rules classify all MUPS into three types based on the transitivity of unsatisfiability,fully dependent on C（MUPSf）,transitively dependent on C（MUPSt）and uncertainly dependent on C（MUPSu）.The results show that the number of MUPSt is frequently a large fraction of the total number of all MUPS,but only MUPSf catches the root error of C.Modelers and domain experts conduct iterative repair work effectively,considering only MUPSf in each iteration.The classification shows the significance for the evaluation of the quality of ontologies from the perspective of maintenance and for repair work.
文摘去年12月上旬为期四天的International Electron Devices Meeting(IEDM)年会上,展示了比“Deep Space Nine”更具艺术性的电子技术。若是你喜爱的半导体设备在1995年变得更快、更小或更便宜了,那它一定会出现在提交会议的220多份前沿研究论文中。 一些论文介绍了以1Gb DRAM芯片取代16Mb芯片的技术。当传统的DRAM电容器变小时。
