目的:探讨全身振动(whole body vibration, WBV)对兔膝骨关节炎(osteoarthritis, OA)关节软骨的保护作用和软骨下骨重塑的影响。方法:48只新西兰大白兔分为四组:空白对照组(CON组)、骨关节炎对照组(ACLT组)、盐酸氨基葡萄糖组(GH组)、...目的:探讨全身振动(whole body vibration, WBV)对兔膝骨关节炎(osteoarthritis, OA)关节软骨的保护作用和软骨下骨重塑的影响。方法:48只新西兰大白兔分为四组:空白对照组(CON组)、骨关节炎对照组(ACLT组)、盐酸氨基葡萄糖组(GH组)、全身振动组(WBV组),每组12只。CON组不进行任何干预;ACLT组给予造模手术后不进行干预;GH组动物造模手术8周后进行盐酸氨基葡萄糖灌胃;WBV组在造模术后8周,使用WBV治疗仪进行干预。造模术后12周,取动物血液进行Elisa检测,取左侧胫骨近端进行大体标本观察,取左侧胫骨近侧进行HE染色、番红O-固绿染色、甲苯胺蓝染色,用于软骨组织学的Mankin评分和软骨下骨组织形态计量学分析。结果:CON组、WBV组软骨下骨骨小梁面积百分比,骨小梁数量均显著高于ACLT组。两组的骨小梁分离度均显著低于ACLT组和GH组。GH组骨小梁分离度亦显著低于ACLT组。骨小梁宽度各组间差异无显著性意义。ACLT组CTX-Ⅱ值较CON组显著升高,WBV组和GH组的CTX-Ⅱ值均较ACLT组显著降低。ACLT组PⅡANP值较CON组显著降低,GH组的PⅡANP值亦较ACLT组显著降低,WBV组的PⅡANP值与ACLT组差异无显著性意义,显著降低。结论:WBV治疗增加了兔OA关节胫骨软骨下骨骨小梁面积百分比、骨小梁数量,降低骨小梁分离度,降低膝OA兔的血清CTX-Ⅱ水平,有利于延缓兔OA关节软骨退变。展开更多
Semantic query optimization (SQO) is comparatively a recent approach for the transformation of given query into equivalent alternative query using matching rules in order to select an optimal query based on the costs ...Semantic query optimization (SQO) is comparatively a recent approach for the transformation of given query into equivalent alternative query using matching rules in order to select an optimal query based on the costs of executing alternative queries. The key aspect of the algorithm proposed here is that previous proposed SQO techniques can be considered equally in the uniform cost model, with which optimization opportunities will not be missed. At the same time, the authors used the implication closure to guarantee that any matched rule will not be lost. The authors implemented their algorithm for the optimization of decomposed sub-query in local database in Multi-Database Integrator (MDBI), which is a multidatabase project. The experimental results verify that this algorithm is effective in the process of SQO.展开更多
Clustering categorical data, an integral part of data mining,has attracted much attention recently. In this paper, the authors formally define the categorical data clustering problem as an optimization problem from th...Clustering categorical data, an integral part of data mining,has attracted much attention recently. In this paper, the authors formally define the categorical data clustering problem as an optimization problem from the viewpoint of cluster ensemble, and apply cluster ensemble approach for clustering categorical data. Experimental results on real datasets show that better clustering accuracy can be obtained by comparing with existing categorical data clustering algorithms.展开更多
The problem of scalable classification by clustering in large databases was discussed. Clustering based classification method first generates clusters using clustering algorithms. To classify new coming da-ta points, ...The problem of scalable classification by clustering in large databases was discussed. Clustering based classification method first generates clusters using clustering algorithms. To classify new coming da-ta points, it finds the κ nearest clusters of the data point as neighbors, and assign each data point to the dominant class of these neighbors. Existing algorithms incorporated class information in making clustering decisions and produced pure clusters （each cluster associated with only one class）. We presented hybrid cluster based algorithms, which produce clusters by unsupervised clustering and allow each cluster associ- ated with multiple classes. Experimental results show that hybrid cluster based algorithms outperform pure ones in both classification accuracy and training soeed.展开更多
In complicated application environment such as CIMS (Computer Integrated Manufacture System) enterprise, it will bring great benefits to integrate distributed knowledge sources. But the difficulties of knowledge shari...In complicated application environment such as CIMS (Computer Integrated Manufacture System) enterprise, it will bring great benefits to integrate distributed knowledge sources. But the difficulties of knowledge sharing and reuse seriously encumbrance the implementation of knowledge integration. In this paper, we describe how a framework of knowledge-integrated system based on ontology (KISO) can be used to support integrating distributed knowledge sources.展开更多
大家对网页上的播放器一定很熟悉，它们的外观和面板真是五花八门，但归根到底不是Windows Media Player、就是RealOneo或Macromedia Flash Player，也就是说只要你在网页或论坛、博客中嵌入这三种播放器即可在线播放所有的沉媒体文件...大家对网页上的播放器一定很熟悉，它们的外观和面板真是五花八门，但归根到底不是Windows Media Player、就是RealOneo或Macromedia Flash Player，也就是说只要你在网页或论坛、博客中嵌入这三种播放器即可在线播放所有的沉媒体文件，例如ASFNVMV／AVI／QT／QTM／MOV／RA／RAM／RPM／RM／RMVB／MP3／VVMA／WAV等格式的音频，视频文件。下面就来看常见的流媒体格式以及网页播放器的创建使用方法吧。展开更多
文摘目的:探讨全身振动(whole body vibration, WBV)对兔膝骨关节炎(osteoarthritis, OA)关节软骨的保护作用和软骨下骨重塑的影响。方法:48只新西兰大白兔分为四组:空白对照组(CON组)、骨关节炎对照组(ACLT组)、盐酸氨基葡萄糖组(GH组)、全身振动组(WBV组),每组12只。CON组不进行任何干预;ACLT组给予造模手术后不进行干预;GH组动物造模手术8周后进行盐酸氨基葡萄糖灌胃;WBV组在造模术后8周,使用WBV治疗仪进行干预。造模术后12周,取动物血液进行Elisa检测,取左侧胫骨近端进行大体标本观察,取左侧胫骨近侧进行HE染色、番红O-固绿染色、甲苯胺蓝染色,用于软骨组织学的Mankin评分和软骨下骨组织形态计量学分析。结果:CON组、WBV组软骨下骨骨小梁面积百分比,骨小梁数量均显著高于ACLT组。两组的骨小梁分离度均显著低于ACLT组和GH组。GH组骨小梁分离度亦显著低于ACLT组。骨小梁宽度各组间差异无显著性意义。ACLT组CTX-Ⅱ值较CON组显著升高,WBV组和GH组的CTX-Ⅱ值均较ACLT组显著降低。ACLT组PⅡANP值较CON组显著降低,GH组的PⅡANP值亦较ACLT组显著降低,WBV组的PⅡANP值与ACLT组差异无显著性意义,显著降低。结论:WBV治疗增加了兔OA关节胫骨软骨下骨骨小梁面积百分比、骨小梁数量,降低骨小梁分离度,降低膝OA兔的血清CTX-Ⅱ水平,有利于延缓兔OA关节软骨退变。
文摘Semantic query optimization (SQO) is comparatively a recent approach for the transformation of given query into equivalent alternative query using matching rules in order to select an optimal query based on the costs of executing alternative queries. The key aspect of the algorithm proposed here is that previous proposed SQO techniques can be considered equally in the uniform cost model, with which optimization opportunities will not be missed. At the same time, the authors used the implication closure to guarantee that any matched rule will not be lost. The authors implemented their algorithm for the optimization of decomposed sub-query in local database in Multi-Database Integrator (MDBI), which is a multidatabase project. The experimental results verify that this algorithm is effective in the process of SQO.
文摘Clustering categorical data, an integral part of data mining,has attracted much attention recently. In this paper, the authors formally define the categorical data clustering problem as an optimization problem from the viewpoint of cluster ensemble, and apply cluster ensemble approach for clustering categorical data. Experimental results on real datasets show that better clustering accuracy can be obtained by comparing with existing categorical data clustering algorithms.
文摘The problem of scalable classification by clustering in large databases was discussed. Clustering based classification method first generates clusters using clustering algorithms. To classify new coming da-ta points, it finds the κ nearest clusters of the data point as neighbors, and assign each data point to the dominant class of these neighbors. Existing algorithms incorporated class information in making clustering decisions and produced pure clusters （each cluster associated with only one class）. We presented hybrid cluster based algorithms, which produce clusters by unsupervised clustering and allow each cluster associ- ated with multiple classes. Experimental results show that hybrid cluster based algorithms outperform pure ones in both classification accuracy and training soeed.
文摘In complicated application environment such as CIMS (Computer Integrated Manufacture System) enterprise, it will bring great benefits to integrate distributed knowledge sources. But the difficulties of knowledge sharing and reuse seriously encumbrance the implementation of knowledge integration. In this paper, we describe how a framework of knowledge-integrated system based on ontology (KISO) can be used to support integrating distributed knowledge sources.
文摘大家对网页上的播放器一定很熟悉，它们的外观和面板真是五花八门，但归根到底不是Windows Media Player、就是RealOneo或Macromedia Flash Player，也就是说只要你在网页或论坛、博客中嵌入这三种播放器即可在线播放所有的沉媒体文件，例如ASFNVMV／AVI／QT／QTM／MOV／RA／RAM／RPM／RM／RMVB／MP3／VVMA／WAV等格式的音频，视频文件。下面就来看常见的流媒体格式以及网页播放器的创建使用方法吧。
