In this paper we obtain a numerically tractable test (sufficient condition) for the exponential stability of the unique positive equilibrium point of an ODE system. The result (Theorem 3.1) is based on Lyapunov theory...
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In this paper we study state-space realizations of Linear and Time-Invariant (LTI) systems. Motivated by biochemical reaction networks, Gonçalves and Warnick have recently introduced the notion of a Dynamical Str...
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The main goal of the paper is to study the equilibria of a nonlinear system, proving the existence and uniqueness of an equilibrium point in the positive ortant. We also provide numerically tractable conditions (by us...
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For several decades, the power system protection relay has experienced many important changes, from purely electromechanical type to the mixture of electronic and electromechanical type, then to fully static and now f...
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For several decades, the power system protection relay has experienced many important changes, from purely electromechanical type to the mixture of electronic and electromechanical type, then to fully static and now fully numerical relays based on microprocessors. In the transformer protection area, similar changes can be seen. This new numerical technology had been developed so much that now the protection systems integrates in the same device, besides the protection function also the control functions, this kind of systems also being called as multifunctional protection system (MPS). The paper relieve the main features of the newly developed transformer protection and control systems, the positive impact on the faults clearance times and also the development trends in this domain .
The service-oriented environment offers the opportunity to create new applications, by combining existing applications offered as services, in order to react to the business' increasing pressure of quickly deliver...
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The service-oriented environment offers the opportunity to create new applications, by combining existing applications offered as services, in order to react to the business' increasing pressure of quickly delivering new applications. With a large number of web services offering the same functionality, choosing the web services that meet best the client's quality of service (QoS) requirements is a very important task. We introduce a QoS-aware end to end web service composition approach that handles all the stages from the web service discovery step, to the actual binding of the services. This approach uses our method of expressing nonfunctional preferences, which requires minimal effort on the part of the clients, but offers great flexibility in managing trade-offs. We define a QoS preferences ontology and use it in our semantic web service selection to choose an initial candidate list of services for every task in the orchestration model. Then, one concrete service is chosen from each candidate list and is boand to the corresponding task. This step involves computing and comparing the aggregated QoS of the resulting composite services. The selection is performed using a genetic algorithm.
The micro RNA-messenger RNA dynamics is a topic of constant interest. In this paper we analyze the stability of equilibria of a mathematical model associated to this interaction. After proving the existence and unique...
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The present paper introduces a mathematical model for the cross-talking between microRNA and Protein. Studying the qualitative properties of the proposed model, we infer that the microRNA is an inhibitor for the Prote...
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