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Lifetime is an important performance factor in the reliable operation of power converters. However, the state-of-the-art LC filter design of a buck dc–dc converter is limited to the specifications of voltage and current ripples and constrains in power density and cost without reliability considerations. This paper proposes a method to optimize the design of the LC filters from a reliability perspective,...
In power electronics converters, the insulated gate bipolar transistors (IGBTs) are easy to fail during possible large disturbance on the source or load side. This paper redefines the safety operating area (SOA) by proposing a relationship between the junction temperature rising time and the disturbing current on the device. An improved temperature-dependent Cauer-type thermal model is used to uncover...
In this paper, we propose and evaluate a new fuzzy-based reliability system for Peer-to-Peer (P2P) communications in JXTA-Overlay platform considering as a new parameter the peer congestion situation. In our system, we considered four input parameters: Data Download Speed (DDS), Peer Congestion Situation (PCS), Number of Interactions (NI) and Packet Loss (PL) to decide the Peer Reliability (PR). We...
Reliability-oriented design has been proved to be a kind of effective design methodology for power electronic equipment. This paper proposes a design method to obtain the value of inductance and capacitance sets that obtain high capability, power density, high reliability of an LC filter in buck converters through a multi-objective optimization way. The cutoff frequency, lifetime of capacitor and...
In P2P systems, each peer has to obtain information of other peers and propagate the information to other peers through neighboring peers. Thus, it is important for each peer to have some number of neighbor peers. Moreover, it is more significant to discuss if each peer has reliable neighbor peers. In reality, each peer might be faulty or might send obsolete, even incorrect information to the other...
In this paper, we propose and evaluate a new fuzzy-based reliability system for Peer-to-Peer (P2P) Communications in JXTA-Overlay platform considering as a new parameter the sustained communication time. In our system, we considered four input parameters: Data Download Speed (DDS), Local Score (LS), Number of Interactions (NI) and Sustained Communication Time (SCT) to decide the Peer Reliability (PR)...
In P2P systems, each peer has to obtain information of other peers and propagate the information to other peers through neighboring peers. Thus, it is important for each peer to have some number of neighbor peers. Moreover, it is more significant to discuss if each peer has reliable neighbor peers. In reality, each peer might be faulty or might send obsolete, even incorrect information to the other...
In this paper, we propose and evaluate a new fuzzy-based reliability system for Peer-to-Peer (P2P) Communications in JXTA-Overlay platform. In our system, we considered four input parameters: Number of Authentic Files (NAF), Local Score (LS), Number of Interactions (NI) and Security (S) to decide the Peer Reliability (PR). We evaluate the proposed system by computer simulations. The simulation results...
In this paper, we propose and evaluate a new fuzzy-based reliability system for Peer-to-Peer (P2P) Communications in JXTA-Overlay platform. In our system, we considered four input parameters: Number of Interactions (NI), Security (S), Packet Loss (PL) and Local Score (LS) to decide the Peer Reliability (PR). We evaluate the proposed system by computer simulations. The simulation results have shown...
The reliability of peers is very important for safe communication in Peer-to-Peer (P2P) systems. The reliability of a peer can be evaluated based on the reputation and interactions with other peers to provide different services. However, in order to decide the peer reliability there are needed many parameters, which make the problem NP-hard. In this paper, we propose and evaluate a new fuzzy-based...
In this paper, we propose and evaluate a new fuzzy-based reliability system for Peer-to-Peer (P2P) Communications in JXTA-Overlay platform. In our system, we considered three input parameters: Number of Interactions (NI), Security (S), Packet Loss (PL) to decide the Peer Reliability (PR). We evaluate the proposed system by computer simulations. The simulation results have shown that the proposed system...
In this paper, we propose and evaluate a new fuzzy-based reliability system for Peer-to-Peer (P2P) Communications in JXTA-Overlay that decides the Peer Reliability (PR). In our system, we considered three input parameters: Number of Interactions (NI), Local Score (LS), Security (S). We evaluate the proposed system by computer simulations. The simulation results have shown that the proposed system...
In this paper, we propose and evaluate a new fuzzy-based reliability system for Peer-to-Peer (P2P) Communications in JXTA-Overlay that decides the Peer Reliability (PR). In our system, we considered three input parameters: Local Score (LS), Number of Authentic Files (NAF) and Number of Interactions (NI). We evaluate the proposed system by computer simulations. The simulation results have shown that...
Communication reliability has always been the bottleneck problem for wireless networks. Combining with the development of wireless networks for emergency application, a new approach is proposed to implement the redundancy function in wireless tree network. The necessity of this approach is analyzed, the whole system includes software and hardware is designed, the significative experiment is completed...
The ultra high voltage (UHV) AC power transmission is introduced. The paper demonstrates the feasibility and necessity of the development of the ultra high AC power transmission in China. The operation of UHV AC power transmission test and demonstration project is summarized. The impact of developing UHV power transmission on East China is described. Prospect of UHV system is done in the end.
We propose a Petri-net-based approach for reliability prediction of composite service built on WS-CDL. To quantitatively investigate the reliability of composite services, we first give a set of translation rules to map WS-CDL elements into generalized-stochastic-petri-nets (GSPN). Based on the GSPN representation, we introduce the prediction algorithm to calculate the process-normal-completion probability...
In this paper, propose a quasi-linear pattern based on expectation and variance to process the random constraints, after analyzing the essence of stochastic programming and the deficiencies of existing methods. Give a stochastic programming pattern (generalized expected value model) with good operability, and establish its corresponding generalized expected value model in stochastic vehicle routing...
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