随着校园内数字资源的增多,如何进行存储和管理是一个重要的问题,文中介绍了以服务器为中心、以网络为中心、以数据为中心的数据存储方式,分析了它们的优点和不足。针对校园内数字资源的特征,给出了校园网中数字资源存储方案的建议,结...随着校园内数字资源的增多,如何进行存储和管理是一个重要的问题,文中介绍了以服务器为中心、以网络为中心、以数据为中心的数据存储方式,分析了它们的优点和不足。针对校园内数字资源的特征,给出了校园网中数字资源存储方案的建议,结合软件定义网络(Software Defined Networking,SDN)新技术进行了探讨。这些方法有利于校园数字资源的整合利用,节约资金,提高管理效率和系统的性能,方便用户的使用。展开更多
Large-scale gypsum rocks associated with world-class Pb-Zn ore formations are widely distributed in the Lanping Basin,Sowthwest China.Geochemical studies alongside field investigations were conducted in this study to ...Large-scale gypsum rocks associated with world-class Pb-Zn ore formations are widely distributed in the Lanping Basin,Sowthwest China.Geochemical studies alongside field investigations were conducted in this study to determine the source and evolutionary processes of the gypsum rocks in this area.The gypsum sequences in the Lanping Basin developed in two formations:the Triassic Sanhedong Formation and the Paleogene Yunlong Formation.The gypsum hosted in the former displays a primary thick-banded structure withδ34SV-CDT values in the range of 14.5‰−14.8‰.Combined with the 87Sr/86Sr values(0.707737−0.707783)of limestone,it can be suggested that the Sanhedong Formation is of marine origin.In contrast,the gypsum from the Paleogene Yunlong Formation is characterized by the dome,bead and diapiric salt structures,wider range of both 87Sr/86Sr(0.707695−0.708629)andδ34SV-CDT values(9.6‰−17‰),thus indicating a marine source but with the input of continental materials.The initial layered salt formations were formed by chemical deposition in a basin and were later intensely deformed by collisional orogeny during the Himalaya period.As a result,variable salt structures were formed.We hereby propose an evolutionary model to elucidate the genesis of the gypsum formations in the Lanping Basin.展开更多
文摘随着校园内数字资源的增多,如何进行存储和管理是一个重要的问题,文中介绍了以服务器为中心、以网络为中心、以数据为中心的数据存储方式,分析了它们的优点和不足。针对校园内数字资源的特征,给出了校园网中数字资源存储方案的建议,结合软件定义网络(Software Defined Networking,SDN)新技术进行了探讨。这些方法有利于校园数字资源的整合利用,节约资金,提高管理效率和系统的性能,方便用户的使用。
基金Project(41362008)supported by the National Natural Science Foundation of China。
文摘Large-scale gypsum rocks associated with world-class Pb-Zn ore formations are widely distributed in the Lanping Basin,Sowthwest China.Geochemical studies alongside field investigations were conducted in this study to determine the source and evolutionary processes of the gypsum rocks in this area.The gypsum sequences in the Lanping Basin developed in two formations:the Triassic Sanhedong Formation and the Paleogene Yunlong Formation.The gypsum hosted in the former displays a primary thick-banded structure withδ34SV-CDT values in the range of 14.5‰−14.8‰.Combined with the 87Sr/86Sr values(0.707737−0.707783)of limestone,it can be suggested that the Sanhedong Formation is of marine origin.In contrast,the gypsum from the Paleogene Yunlong Formation is characterized by the dome,bead and diapiric salt structures,wider range of both 87Sr/86Sr(0.707695−0.708629)andδ34SV-CDT values(9.6‰−17‰),thus indicating a marine source but with the input of continental materials.The initial layered salt formations were formed by chemical deposition in a basin and were later intensely deformed by collisional orogeny during the Himalaya period.As a result,variable salt structures were formed.We hereby propose an evolutionary model to elucidate the genesis of the gypsum formations in the Lanping Basin.