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In this paper, we designed, implemented, and evaluated the performance of a Packet-in packet buffer system in an SDN bare metal commodity switch and Open vSwitch. In our approach, only the first packet of a new flow needs to be sent to the SDN controller via a Packet-in packet and all subsequent packets can be temporarily stored in the Packet-in packet buffer system until the arrival of the flow rule...
Today, storage area networks (SAN) are widely used in data center networks to connect servers to data storage devices. In such a network, ensuring zero packet loss is very important for a server's network file system (NFS) to quickly access data across the network. Otherwise, the time spent on detecting packet losses and then retransmitting the lost data will severely harm the data access throughput...
This paper presents an adaptive sliding self-organizing fuzzy controller (ASSOFC) designed using fuzzy theory and a self-organizing algorithm. Composed of a conventional fuzzy controller (FC) and self-organizing algorithm, the ASSOFC adopts the sliding surface signal as an input, uses the algorithm to adjust the central position of the output consequent membership function of the FC, and, by fuzzy...
The interventional therapy is a kind of minimally invasive treatment. Under the guidance of medical imaging equipment, surgeons take the special catheter, guide wire and other precision instruments import in the body to do the pathological diagnosis and local treatment. The characters of interventional therapy are no operation, small trauma, rapid recovery, etc. However, the interventional treatment...
The interventional surgery is a minimally invasive treatment, which uses the modern high technology. It takes the special catheter, guide wire and other precision instruments to import in the body to do the pathological diagnosis and local treatment under guide of medical imaging equipment. Interventional surgery has excellent characteristics like no operation, small trauma, rapid recovery, etc. It...
This study proposed an adaptive recurrent cerebellar model articulation controller (ARCMAC) which consisted of a recurrent Gaussian cerebellar model articulation controller (RCMAC) and a compensation controller. The ARCMAC was used as the speed controller for a switched reluctance motor (SRM), and the contained compensation controller was used to offset the error between the RCMAC and a theoretically...
In this study, the sliding mode controller (SMC) and the Takagi-Sugeno-Kang (TSK) fuzzy system were employed to design the proposed sliding mode controller with adaptive fuzzy compensation (AFSC). This design can improve the speed control performance of switched reluctance motor drive systems. Lyapunov function was derived to ensure the stability of the controller in the motor drive systems. To verify...
Traceroute is a very useful troubleshooting tool. It reveals the routing path taken by a packet destined to a remote host. Traceroute is originally designed for the legacy IP network. However, the mechanism used by it does not work in an SDN network. In an SDN network, there has been a similar tool called SDN traceroute that provides similar functions as traceroute. However, SDN traceroute does not...
This study proposed a fuzzy excitation controller to reduce noise and torque ripples for switched reluctance motors. The design of the controller is simple and can generate appropriate turn-on and turn-off angles according to the speed of torque error in order to improve the torque response. At the motor speed of 300 rpm with one Nm load, the experimental results showed that the implantation of a...
In this paper, we design and implement a scheme to build an optimal spanning tree over a hybrid network composed of SDN and legacy switches. SDN is an emerging network technology and gradually gaining adoption worldwide. However, during the technology transition period, which may last several years from now on, inevitably SDN switches and legacy switches will need to coexist in a network. In a legacy...
In this article, we introduce the EstiNet OpenFlow network simulator and emulator, and present its support for testing the functions and evaluating the performances of software-defined networks?? OpenFlow controller??s application programs. EstiNet uses an unique kernel reentering simulation methodology to enable unmodified real applications to run on nodes in its simulated network. As a result, without...
This paper considers the influence of ERP's implementation on the enterprise internal control effect with the method of empirical, It is based on the data of the enterprises which implement ERP in 2008 as the research object, take internal control's three big goals as the starting points and are in view of ERP implementation process in correlation factor. The findings suggest that ERP's brand and...
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