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The fundamental tasks of the control plane in software defined networking (SDN) are to customize forwarding policies for the data plane and to provide global network view for applications. The logically centralized control plane design brings benefits in terms of network programmability and can largely ease network management. However, it also increases efficiency concerns. One practical control plane...
Software-Defined Networking (SDN) has great potentials in changing the fragile and complex enterprise networks. One operational challenge to SDN deployment is the settlement of legacy switches. A hybrid SDN consisting of both SDN and legacy switches may be a tradeoff. Nevertheless most of the current SDN control planes can not handle legacy switches. To overcome this problem, we present HybridFlow,...
Modern cloud-based applications are becoming more communication-intensive, posing a challenge for data centers to supply sufficient bandwidth. Current data centers are not optimized for such cloud-based software services. In practice, due to the variability of traffic load, data centers may suffer from lower throughput, as well as higher latency, dramatically reducing quality of service (QoS). This...
When ship docks at harbor or other sea area, both the robustness and dynamic properties of course control system are required strictly. Because the model parameters are relative to the speed and load of the ship, it is difficult to design a good controller based on the ship model. This paper combines internal model control with fuzzy neural network to design a course system. First, it designs a zero...
This paper proposes a Safety Spacing Policy (SSP) that can ensure safe operation while at the same time improving traffic flow for Adaptive Cruise Control (ACC) system. The proposed SSP, a nonlinear function of vehicle velocity, uses both the information of vehicle's state and braking capacity to adjust the position and velocity of the controlled vehicle. String stability, traffic flow stability and...
The well-known direct torque control (DTC) is a very simple control method for inverter-fed AC drives, which characterized by fast dynamic response, structural simplicity, and low sensitivity to parameter changes. Attempts to combine DTC with SVM have led to new ways. This paper presents a new robust DTC-SVM for high performance induction machine drives. Simulation studies have been carried out for...
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