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.
In this paper a new algorithm of three-level three dimensional space vector modulation (3DSVM) is presented for three-level four-leg diode-clamped inverter. The proposed algorithm can reduce remarkably the complexity of 3DSVM by using two sectors only (sector one and sector two) in the conception of all modulation algorithm steps such as: determination of the space vector location, duration time calculation,...
Multilevel power converters have been intensively studied in the power electronics field. However, approaches involving the evaluations and proposals of novel modulation techniques, topologies and applications of semiconductor technologies keep this path as an open research area. This paper proposes a Space Vector Pulse-Width Modulation (SVPWM) approach applied to a Single-stage Ac-Dc Modular Cascaded...
BXI, Bull eXascale Interconnect, is the new inter-connection network developed by Atos for High Performance Computing. It has been designed to meet the requirements of exascale supercomputers. At such scale, faults have to be expected and dealt with transparently so that applications remain unaffected by them. BXI features various mechanisms for this purpose, one of which is the BXI routing component...
This paper deals with iterative formation control problems for multi-agent systems with switching topologies. Our approach combines consensus protocol algorithms conducted with an iterative learning control update. This leads to networks dynamically changing with evolution along two directions: a finite time axis and an infinite iteration axis. A distributed algorithm is constructed based on nearest...
Corrective transmission switching can improve the flexibility of power system. To avoid the computational complexity, a data mining approach for real-time corrective switching is proposed in this paper. A factorized expression that measures the approximate switching effects is first derived. The expression can be utilized to generate candidate transmission switching lists. Based on the factorized...
This paper deals with the event-triggered distributed H∞ filtering for a class of networked systems with sensor networks. The topology of the sensor network is supposed to be time-varying. Whether or not a sampled data packet of a sensor node should be transmitted to its neighbors is determined by a predefined event-triggering condition, which closely depends on the variation of the sensor network...
This paper addresses the distributed resource allocation problem for a network of multiple agents with directed and time-varying communication topologies. Suppose that the total amount of resources is a constant, represented by an equality constraint, and that the amount of resources allocated to each agent is subject to an inequality constraint, called the state constraint. We then aim to solve it...
This paper is concerned with the formation method for multi-robot systems with obstacles. Consensus formation cannot avoid obstacles in the process of movement, and algorithms based on relative distances are not applicable to the situations requiring rigid topology. An algorithm has been designed combining consensus protocols and the modified artificial potential field method for the second-order...
A fat-tree network is scalable, but the probability of network faults also increases with the fat-tree size. Faulttolerant routing in fat tree is thus particularly important. Instead of relying on a time-consuming centralized recovery process, a fast local rerouting algorithm is highly desirable. A deflection based fast local rerouting algorithm, which we call it Local Rerouting by Deflection (LRD),...
Control plane, in Software-defined Networking (SDN), can configure and manage data plane in a centralized way. However, a centralized control plane introduces a problem in scaling SDN network. In terms of network virtualization, we can abstract the network layer by layer in a recursive way. As a result, the whole network can be simplified as a super switch, and it looks like that all hosts or servers...
Routing is a key parameter in the design of the interconnection network of large parallel computers. Depending on the number of routing options available for each packet, routing algorithms are classified into two different categories: deterministic (one available path) and adaptive (several ones). It is well-known that adaptive routing outperforms deterministic routing. Usually, adaptive routing...
This paper investigates the consensus of finite-field networks with switching topologies and linear protocols by using the semi-tensor product (STP) method, and presents a number of new results. First, an algebraic form of finite-field networks with switching topologies and linear protocols is obtained via STP. Second, based on the algebraic form and the switching point reachability, a necessary and...
Fat-tree topology is very popular for constructing interconnect network for data centers. Routing is one of the most important design issues of data center networks. Several routing algorithms have been proposed for fat-tree topology, but they all ignore the fault diagnosis problem. In order to facilitate the diagnosis of link-fault in fat-tree based networks, in this paper we propose the FT-BTR,...
In this paper, a new isolated DC-AC converter with “sinusoidal shape” output voltage is analyzed, simulated and verified with a scaled prototype. Design expressions for selection of passive component values and design requirements of power semiconductor devices are given. The control algorithm is thoroughly investigated. The converter losses based on the commercially available semiconductors are calculated...
We present a parallel implementation of three transmission switching algorithms. The first is based on a parallel search of all candidate lines, the second is based on a priority listing of lines and the third is based on decomposing the set of candidate lines in smaller subsets that are solved in parallel. We present a duality result that justifies the priority listing of the second algorithm. The...
We address the problem of estimating the real-time nature of traffic flows in data center networks, using the light-weight SNMP data. Unlike the problem of estimating the traffic matrix (TM) across origin-destination (OD) pairs in ISP networks, the traffic flows across servers or ToR (Top of Rack) switch pairs in data center networks are notoriously more irregular and volatile. Although numerous methods...
In this paper, we present sufficient conditions to address a larger class of digraphs, including balanced ones, whose members' Laplacian (L) makes L1L + LTL1 to be positive semi-definite, where L1 is the Laplacian associated with a fully connected equally-edged weighted graphs. This property can be later utilized to introduce an appropriate energy function for stability analysis of flocking algorithms...
Long-reach hybrid WDM-TDM PONs connect far away service areas to center offices of service providers. Typically, multiples fiber cables run from the center office side to each service area in order to feed the service area with data flows. We believe that mesh topology in service areas allows AWGs feeding each other and consequently less fiber cables need to be run between center offices and service...
The opening of under-utilized spectrum creates the opportunity of substantial performance improvement through cognitive radio techniques. However, the real network performance may be limited since unlicensed users must vacate and switch to other available spectrum if the current spectrum is reclaimed by the licensed (primary) users. During the spectrum switching time, network partitions may occur...
We consider the consensus for multiple double-integrator agents systems in a general framework that the position and velocity interactions among agents are modeled by independent graphs. Different algorithms are proposed and analyzed for various different settings, including the case without leaders and the case with a virtual leader under fixed position and velocity interaction topologies, as well...
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.