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To improve the network invulnerability, most strategies are designed for optimizing the network capacity to prevent the cascade overload without considering the network robust under external attacks. To address this problem, based on the classical scale-free network model, this paper proposed a link-based network topology optimization algorithm referred as LNTO. The algorithm removed links among hub...
Multimodal optimization amounts to finding multiple optima of a problem. In recent years, particle swarm optimization (PSO) algorithms have been widely used by the evolutionary computation community to tackle multimodal problems. However, the capability of using a suitable PSO communication topology to induce stable niching behavior has not been well explored. In this paper, we propose a minimum spanning...
This paper introduces a novel multiplex voltage source converter topology based on common DC bus. Except from the excellent characters of traditional VSC, the capacity of the system can be expanded. Dual mode control is proposed to stabilize DC bus voltage, when the superconducting inductor current is between the maximum and the minimum allowable value, chopper control mode is adopted; when the current...
In recent years, with the rapid development of renewable energy, power energy storage has become a bottom neck of its development, and superconducting magnetic energy storage (SMES) seems to be a viable solution. A topology based on common DC voltage bus is proposed for high power voltage source converter (VSC)-SMES. The mathematical model of SMES is constructed and the detailed control strategy is...
Cloud-based big data platforms are being widely adopted in industry, due to their advantages of facilitating the implementation of big data processing and enabling elastic service framework. Alongside with the widespread adoption of cloud-based MapReduce frameworks, a series of solutions have been proposed to improve the performance of big data services over cloud. Majorities of the existing studies...
This article investigates the cooperative H∞ filtering problem of multi-agent systems. The filter input consists of relative states among neighboring agents and the individual states of a few agents. A topology graph is applied to represent the communication links among agents. The filtering error system is composed of the original system state, filter system state and the estimation error of relative...
This study proposes a novel 5-level converter topology in which common flying capacitors (FCs) are shared by three phases. This circuit can output voltage patterns prohibited in the circuits of the previous study. Furthermore,a back-to-back (BTB) configuration can be realized by only increasing the number of the phase units of the 5-level converter. This BTB system employs common FCs for all input...
This paper introduces a multilevel converter topology with common flying capacitors shared by phases. The unique feature of this configuration makes contribution to reduce the total number of components like switching devices and capacitors, which is closely related to the converter cost and volume. Therefore, low cost and high power density are expected to be achieved. A three-phase 5-level converter,...
The development of micro-grid and energy storage devices are inseparable, without energy storage devices, micro-grid will not be able to run stablely, the paper reviews the principle of SMES devices and the main circuit topology, ultimately the cascaded H-bridge topology is adopted. Simulation and analysis is carried out, and the results show that the device active and reactive power can be well compensated...
In this paper, we proposed a new dynamic topology- adaptive broadcast cluster network topology structure, based on hybrid-like network of wireless sensor networks. This network topology structure can well-suited to mobile nodes in wireless sensor networks system. The Simulation result in this paper shows that the network topology has better viability and dynamic in nature.
We present a solid study on the performance of a homological sensor network in partial sensing coverage, which means the network has at least one sensing coverage hole and we demonstrate that when sacrificing a little coverage the system lifetime can be prolonged significantly. In particular, we showed that when there is one sensing coverage hole (with a coverage rate of 97%) the system lifetime can...
In this paper, we consider the design of a policy-based routing system and the role that link state might play. Looking at the problem from a link-state perspective, we propose Centaur, a hybrid routing protocol combining the benefits of both link state and path vector. Through analytical and experimental studies, we demonstrate Centaur's potential in achieving rich policy expressiveness and high...
Aiming at the RIP (routing information protocol) canpsilat dealing with network failures effectively, causing significant forwarding discontinuity after a failure. The drawback with this protocol is that it need to trade off routing stability and forwarding continuity. To improve failure resiliency without jeopardizing routing stability, we propose a fast local rerouting based on RIP called FR-RIP...
Topological relations are one of the most fundamental properties of spatial objects. The topological relations between crisp spatial objects have been well identified. However how to formalize the topological relations between fuzzy regions needs more investigation. The paper provides a theoretic framework for modeling topological relations between fuzzy regions. A novel topological model is formalized...
PlanetLab is a globally distributed overlay platform that has been increasingly used by researchers to deploy and assess planetary-scale network services. This paper analyzes some particular advantages of PlanetLab, and then investigates its evolution process, geographical node-distribution, and network topological features. The revealed results are helpful for researchers to 1) understand the history...
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