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Current data centers often employ SDNs (Software-Defined Networks) that are layered in most cases. However, information overwhelming has been a limitation to SDN deployment. We present a management model for data center networks. In this approach, regional networks on lower layers will be aggregated and viewed as single switches to upper layers. Management information will be divided into three parts,...
We have fabricated Sb2Te3 thin films, with different thicknesses by controlling the deposition times, using pulsed laser deposition. We studied the dielectric properties using terahertz time domain spectroscopy (TDS). The real and imaginary parts of the complex refractive index of Sb2Te3 thin films were presented.
Utilization of wind and solar energy at permanent and temporary polar research stations is reviewed in light of the ongoing search for a diesel fuel replacement. Renewable energy sources are available that can help to reduce the need to transport and handle bulk fossil fuels in remote and extreme cold climate regions. Fundamental concepts that underpin these technologies are described, and some of...
This paper proposes a dynamic physical-virtual NIC switching. A virtual machine directly accessing the physical NIC can switch to use the virtual NIC if it is to be migrated. This solution is implemented in network configuration level in Guest OS drivers, so it can be used in different VMMs and with different NICs. The experiments illustrate that our solution does not interrupt the network connections...
Recently, most of the traffic on the existing networks is occupied by the content distribution and retrieval. The existing technologies such as the P2P technology and DHT technology although have evolved the scalability, robust, effective of the content distribution, there are some problems existing. P2P technology has been implemented to store and deliver the content stored in the P2P overlay, while...
Spatial information is now increasing continuously and is available via the Internet. But facing the abundant spatial information, people recognize many agonizing problems, such as how can spatial information cooperate with each other to solve users' task and how do users know where spatial information is located, what kinds of spatial information can be used, and the way of how to use them. The only...
“Network Storage and System Virtualization Technologies” is an up-to-date course opened by the school of electronics engineering and computer science of Peking University. The purpose of this course is to help students to catch up with the fast development of computer science. The theory and the practice of the course mainly give emphasis on the design of “data center”, including “network storage”...
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