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After 911 event happened in USA, there are increasingly companies beginning to take care of disaster tolerance. Great deals of companies pay huge money to construct disaster tolerant architecture. But this scheme is just suitable for big enterprise. Thatpsilas too expensive and inconvenient. In few years ago, there is a new way to store mass data called virtual storage. This could use the exited resource...
In this paper, a novel primary-side control mechanism with current compensation in flyback converters is proposed. The switch voltage and the switch current are sampled to obtain the information of the output voltage and the load current. The close loop feedback control is based on the information of the switch voltage and the switch current. The control circuit can be integrated into an IC chip,...
To improve the traditional direct torque control, bring in the stator field-oriented method, and introduce how to realize the quick response under the constant stator flux amplitude. Then directly calculate the accurate voltage vector values according to the angle that the flux goes across during a cycle and the difference between the flux's actual and desired values. In the last the space vector...
In this work we investigate a (seasonal) prey-predator model where the system evolves during a season whose length is fixed. Predators have the choice between foraging the food (eating preys) and reproducing (laying eggs at a rate proportional to their energy). Preys can either eat, which would maintain their population in the absence of predators, or hide from the predators but they then suffer a...
In this paper we describe our approach to support ongoing meetings with an automated meeting assistant. The system based on the AMIDA content linking device aims at providing relevant documents used in previous meetings for the ongoing meeting based on automatic speech recognition. Once the content linking device finds documents linked to a discussion about a similar subject in a previous meeting,...
Switched converter (SC) DC/DC converters are new prototype of DC/DC Conversion technology. Since switched capacitor can be integrated into a power IC chip, consequently, these converters have small size and high power density. Switched capacitor can be used in voltage-lift technique to construct DC/DC converters. The clue is that for the converters operating in input current discontinuous mode (ICDM)...
The class-E ZVS/ZDS operation within the class-DE amplifier can be easily achieved by adding external shunt capacitances. This paper presents the analytical expressions for the design of the class-DE amplifier with the shunt capacitances composed of the linear and nonlinear capacitances for the switch-on duty ratio D=0.25. In the analysis, an equivalent linear shunt capacitance of nonlinear MOSFET...
This paper is concerned with robust passivity analysis of a class of uncertain nonlinear singular time-delay systems as well as with passivity-based sliding mode control of such systems. First we derive a delay-dependent sufficient condition expressed by means of linear matrix inequalities for achieving the generalized quadratic stability and robust passivity of the sliding mode dynamics. Then we...
Charge balancing is a major concern in functional electrical stimulation, since any excess charge accumulation over time leads to electrolysis with electrode dissolution and tissue destruction. This paper presents a new active approach for charge balancing using long-term offset regulation. Therefore, the electrode voltage is briefly monitored after each stimulation cycle and checked if it remains...
A new dasiaextended turn-off timepsila compensation parameter is introduced to overcome the low-current nonlinear voltage distortion effect in IGBT inverters. The compensation technique uses datasheet parameters in conjunction with an analytical approach to model the low-current switching characteristics of an IGBT. As a result, output voltage amplitude is accurately controlled and low-order voltage...
A new set-membership affine projection (SM-AP) algorithm for adaptive filtering applications is proposed. The new SMAP algorithm eliminates the error-bound estimation problem of the conventional SM-AP algorithm. The poor tracking performance in nonstationary environments of the conventional SM-AP algorithm is also considered. A solution to this problem is proposed by incorporating a switching mechanism...
In real applications there are different communication needs among the cores. When NoCs are the means to interconnect the cores, the use of some techniques to optimize the communication are indispensable. From the performance point of view, large buffer sizes ensure performance during different applications execution, but unfortunately, these same buffers are the main responsible for the router total...
Networking infrastructure is a vital part of virtual computer clusters. This paper describes VirtCloud, a system for interconnecting virtual clusters in a state-wide network based on advanced features available in academic networks. The system supports dynamic creation of virtual clusters without the need of run-time administrative privileges on the backbone core network, encapsulation of the clusters,...
The level crossing rate, the outage probability and the average time of fade duration of the Switch and Stay Combiner output signal, in the presence of Rice fading at the input, are determined in this paper. The results are shown graphically for different variance values, decision threshold values and signal and fading parameters values.
Existing black-box adaptation techniques are insufficiently powerful for a large class of real-world tasks. Meanwhile, white-box techniques are language-specific and overly invasive. We argue for the inclusion of special-purpose adaptation features in a configuration language, and outline the benefits of targetting binary representations of software. We introduce Cake, a configuration language with...
Reaching consensus on a self-organized wireless sensor networks through totally decentralized algorithms is a topic that has attracted considerable attention. The average consensus method is the most popular algorithm used in this kind of applications. The main advantage of these approaches is that the network does not involve a fusion center to organize nodes. Using a realistic environment to check...
In this paper, a novel content-aware image resizing technique, perceptually improved seam carving with modified energy function, is proposed. The conventional seam carving method using a gradient-based energy function may cause distortion of deformed object shape depending on the layout and amount of contents. However, the proposed method preserves content shape with high fidelity by exploiting a...
Three-level AC switch unit is produced by two-level AC switch unit connected together in series manner. Basic three-level converter is produced by applying three-level AC switch unit in basic converter. Combination mode three-level converter is obtained by combining two basic three-level converters, and it is improved into combination mode three-level converter with input and output sharing the same...
The traditional procedure for analyzing switching converters is based on linearized smooth averaged (small-signal) models and the performance is limited because of the inaccurate model. In this paper, the feedback linearization techniques are proposed to design stabilizing robust controllers for PWM DC-DC converters. Simulation and experimental results validate the analytical predictions.
In this paper, we address the problem of k-out-of-lscr exclusion, a generalization of the mutual exclusion problem, in which there are lscr units of a shared resource, and any process can request up to k units (1 les k les lscr). We propose the first deterministic self-stabilizing distributed k-out-of-lscr exclusion protocol in message-passing systems for asynchronous oriented tree networks which...
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