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Freedom from deadlock is one of the most important issues when designing routing algorithms in on-chip/off-chip networks. Many works have been developed upon Dally's theory proving that a network is deadlock-free if there is no cyclic dependency on the channel dependency graph. However, finding such acyclic graph has been very challenging, which limits Dally's theory to networks with a low number...
The newly emerged Software Defined Networks (SDN) can apply to Wide Area Network (WAN) for network control and management. To achieve this, a logically centralized but a physically distributed control architecture is normally required. This type of control architecture consists of multiple controllers. For maintaining the global consistency of the network, controller placement is a key issue in a...
The thickness of the boundary layer of the discrete-time Tracking-Differentiator is variable, so that the control characteristic line is asymmetric. In general, the nonlinear boundary transform is used to get the control synthesis function. However, it contains square root operations, and the compute is more complex. This study is conducted to put forward a new algorithm to simplify partition boundary...
In the event of a large blackout in the smart distribution system with distributed generators, a power supply restoration plan for the non-fault blackout regions must be devised quickly. According to the actual operation of the smart distribution network with DG after fault and the prin-ciple of islanding, this paper determines the running range of the island, maintains the power supply of the important...
In order to enhance the tracking performance of maneuvering target by forgetting factor RLS algorithm, an improved forgetting factor adaptive function is proposed based on cosine function. This adaptive function can adjust the forgetting factor dynamically according to the tracking error. In addition, a comprehensive predictor is designed, which dynamically selects the linear predictor or the square...
This paper uses Linux4.2.0 and RTAI3.8.13 to form a dual-core solution to study the real-time performance of Linux systems. This paper studies the basic structure of RTAI-Linux kernel. On this basis, the ADBORROW algorithm is used to improve the time slice rotation strategy of EDF dynamic scheduling algorithm. Assign tasks to RTAI-Linux systems based on dual-core x86 architectures and perform real-time...
Nowadays Distribution networks are growing in complex due to the increase in power demand, variation in load and different kinds of load. So these leads to degradation of quality power to the consumers. The efficient Operation of Distribution networks can be achieved by reconfiguring the network for reducing the line losses and for improving the system reliability. IHSA (Improved Harmony Search Algorithm)...
Growing demands for mobile services in recent years has extraordinary increased the number of cellular operators and consequently the portion of energy that is consumed by cellular networks. Hence, green cellular network has been introduced, which suggests the use of energy optimization methods in cellular networks. One of the solutions to optimize the energy consumption of cellular networks is to...
The second-order sliding-mode controller based on improved sub-optimal algorithm for synchronous Buck converte r is designed, and the converter can be controlled only by detecti ng the output voltage without measuring the capacitance current of the converter. By introducing hysteresis to sub-optimal algorit hm, the switching frequency of the converter is limited when the output voltage is stable....
Distributed Mininet implementations have been extensively used in order to overcome Mininet's scalability issues. Even though they have achieved a high level of success, they still have problems and can face bottlenecks due to the insufficient placement techniques. This paper proposes a new placement algorithm for distributed Mininet emulations with optimisation for Fat-Tree topologies. The proposed...
With the migration of computational powers and applications to the cloud, Data Center Networks (DCNs) have become the backbone of the underlying infrastructure. Operation of the data centers relies on huge computational resources and bandwidth, that often undergo high operational costs, frequent link congestions, and imbalanced traffic loads. Software Defined Networking (SDN) based traffic load management...
The purpose of the research is to develop and study Hybrid PWM for three level back-to-back neutral-point clamped converter (3L-BtB-NPC) based on active front-end rectifier and voltage source inverter. Hybrid PWM must provide smooth switching between the algorithms of space vector PWM and selective harmonic elimination PWM of VSI. This allows to decrease the losses in VSI, which arise when commutating...
We experimentally show the performance of a Virtual Infinite Capacitor (VIC) in suppressing the voltage ripple. VIC mainly uses a bi-directional DC-DC converter with only two small capacitors inside to mimic the filtering process of a large capacitor by applying suitable control algorithms. It was firstly proposed in [1], [2] and then improved in [3] in both control algorithms and circuit designs...
The use of social media to network or connect users across the globe has led to high demand in spectrum utilisation hence there is a need for faster data transmission. Faster data transmission can be achieved through the implementation of techniques which minimizes delays in sensing idle channels for SU data transmission. In this study, we implement a channel selection algorithm to minimize channel...
Low-level design parameters such as router micro-architecture (RMA), flow controls (resource allocation), routing techniques and traffic patterns have a major significance on cost and performance of Network on Chip (NOC) design. This work proposes an efficient virtual channel (VC) buffer management structure and a dynamic VC allocation mechanism for the router to minimize latency, and area (buffer...
In High-Performance Computing (HPC) systems, the design of the interconnection network is crucial. Indeed, the network topology, the switch architecture and the routing scheme determine the network performance and ultimately the system one. As the number of endnodes in HPC systems grows, and the supported applications become increasingly demanding for communication, the use of techniques to deal with...
In this paper we design a hybrid predictive controller for the tracking of a sinusoidal reference signal. The stability and forward invariance of a set of points around the reference state, named the tracking ellipse, is established by using tools for hybrid dynamical systems. Moreover, prediction of solutions for a finite number of switching events is used to minimize the number of switches. The...
The maximum power available from a photovoltaic (PV) generator in many grid connected systems is extracted using a dc-dc step up converter that implements a maximum power point tracking (MPPT) algorithm. Traditional MPPT algorithms are iterative, continuously searching for the maximum power point (MPP) under varying weather conditions. Due to the nonlinear time-varying nature of commonly used MPPT...
Software-defined networking (SDN) is a promising technique that has reshaped the landscape of network management. By providing simplified, cost-effective management, SDN has been envisioned as the next-generation network paradigm. However, due to economic, organizational, and technical challenges, replacing all conventional switches in current operational networks by SDN-enabled switches is impractical...
With the increasing device scaling in the semiconductor technology, the necessity for designing robust and efficient Networks-on-Chip (NoCs) is more pronounced. The rerouting approach which is employed in most of the fault-tolerant methods causes the network performance to degrade considerably due to taking longer paths and creating hotspots around the faults. In this paper, a dynamically reconfigurable...
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