The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper reviews Network-on-Chip architectures with prioritization of selected data streams targeting runtime reconfigurable manycore systems. The common idea of these architectures is to minimize the latency of selected packet transmissions by either bypassing or parallelizing processing stages in routers or by using dedicated links bypassing complete routers. Potential classes of selected data...
A new asymmetrical hybrid multilevel inverter topology is presented. The new topology improve the number of the output voltage level greatly through cascading two five-level H-bridge cells. A hybrid PWM strategy is proposed for the new topology that the switches of different cells works in different switching frequency to low switching losses. Lastly, an experimental 17-level asymmetrical inverter...
This assay supposed one kind of asymmetrical multi-level inverter that based on the topology of cells cascading, every cell in this inverter is composed of one two-levels inverter series with several three-levels H bridges, the controlling system is constructed by DSP and FPGA. This article described the topology of this inverter and its controlling methods in detail. In final, tested this inverter's...
There is a strong trend in the photovoltaic (PV) inverter technology to use transformerless topologies in order to acquire higher efficiencies. This paper presents a single-phase five-level grid connected PV inverter with a novel dual reference modulation technique. Two reference signals identical to each other with an offset equivalent to the amplitude of the rectified inverted sine carrier signal...
This project has been oriented to the development of an energy system unit for powering tramways during shorts periods of time. The aim of this work is to present the results obtained for a high frequency DC-DC converter which is included in the energy unit. The energy unit will consist on two type of energy storage devices: a battery stack and a supercapacitor stack. A comparison of the simulated...
A joint power system state and topology estimator based on a combined Weighted Least Squares (WLS) and Weighted Least Absolute Value (WLAV) strategy is proposed. The resulting coestimation algorithm is devised to simultaneously provide estimates to the analog power system variables and validate the current topology of the electric network. This is accomplished by formulating state & topology coestimation...
In this paper, we proposed a dual flit transmission rate (DFTR) router architecture according to the property of short distance for the inter-wafer links for 3D Network on Chip (NoC). The equivalent bandwidth of the inter-wafer links can be N times wider than that of the intra-wafer links, since flit transmission rate in vertical direction can be N times fast than that in the horizon direction. Thus,...
How to organize and discover the virtual resource effectively is an important research issue in network virtualization environment especially across multiple infrastructure providers with conflicting goals. In this paper, we explore a virtual resource organization and discovery framework of multiple infrastructure providers. The framework composed of Cluster Index Servers and Management Nodes aggregates...
Today's Internet is facing many problems which did not take into account in its initial design, such as routing scalability, mobility and security. No matter evolutional or revolutionary solutions that are proposed in recent years, a recognized promising direction is to separate customer network from core network and separate identification from location. In this paper, we sketch out an architecture...
As researchers continue to architect massive-scale systems, it is becoming clear that these systems will utilize a significant amount of shared hardware between processing units. Systems such as the IBM Blue Gene (BG) and Cray XT have started utilizing flat (i.e., scalable) networks, which differ from switched fabrics in that they use a 3D torus or similar topology. This allows the network to grow...
Software Defined Radio (SDR) allows dynamically changing protocols and functions in order to provide flexible, multiple-standard services to users. A reconfigurable baseband architecture having a set of coarse-grained, heterogeneous execution units is one strategy which can meet this requirement. However, while we can integrate a large number of execution units onto a chip, conventional bus structures...
In this paper, a new scheme for three-level voltage space vector generation is proposed. In this work, the three-level inverter topology is realized by feeding an open winding induction motor with two two-level inverters, fed from a single dc source having the magnitude half compared to the NPC three-level inverter. Compared to existing three-level inverter topologies for open-end winding induction...
Networks on chip (NoC), a new packet-based design method, with a new dependable no deadlock (DND) back-tracking routing algorithm are proposed to implement artificial neural network (ANN). This system is simulated by NIRGAM NoC simulator to get system performance. Experimental results show that this proposed system has higher connection-per-second (CPS), lower communication load than the exiting other...
Reconfigurability refers to systems incorporating some form of hardware programmability, that customizes how the hardware is used using a number of physical control points. These control points can be changed periodically in order to execute different applications using the same hardware. This paper presents the design and implementation of reconfigurable switch architecture for next generation networks...
This paper describes a new configuration of the single-phase seven-level voltage source inverter. The proposed inverter based on modified H-bridge converter. The inverter is built of conventional H-bridge inverter and two bidirectional switches and three bulk capacitor banks. To validate the proposed inverter, a low power prototype inverter has been designed and implemented; analytical, simulation...
This paper proposes a new extended boost quasi Z-source inverter (ZSI) and a simple modulation and control method based on one-cycle control for controlling a grid connected PEM fuel cell energy system. ZSIs are gaining popularity. Similarly one-cycle controllers are becoming popular due to their simplicity, ease of implementation and fast response. However, this control method has not been developed...
This paper describes a new topology and implementation of a 10 Gbps voltage mode output driver designed for high speed data transfer applications. Using a positive feedback technique, the low power driver achieves the proper internal chip impedance required for matching the line impedance. As a result, return loss is minimized and good signal integrity is achieved. The driver, which consists of a...
Precise information of MAC layer topology is important for both network management and network analysis. There are many topology discovery algorithms based on the address forwarding tables but they supposed that the network to discovery hasn't redundant links or these algorithms are not effective to discover redundant links. In this paper, we present algorithms based on address forwarding tables (AFT)...
This paper deals with topologies of circuits and strategies of modulation for multilevel inverters. There is a close relationship between these two factors. A new Hybrid multilevel inverter based on the features of the NPC inverter and the Cascade inverter is recommended. Its three modulation strategies and voltages spectrum characteristics are analyzed. The spectrum expressions of the continuous...
This paper proposes a novel ZCT (zero-current-transition) PWM full-bridge DC-DC converter. The proposed converter can achieve ZCS (zero-current- switching) for all the active switches in the entire load ranges, also it realizes soft commutation for the output rectifier diodes. Furthermore, the auxiliary circuit also helps to turn on the main switches softly. Soft-switching operational principle is...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.