Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
Recently the conjugate residual squared (CRS) method has been proposed as an attractive variant of the bi-conjugate residual method. However, in many situations, the CRS algorithm exhibits an irregular convergence behavior. To overcome the disadvantage, we apply a smoothing technique to the CRS algorithm and derived the smoothed CRS algorithm. Numerical experiments indicate that the new method give...
In the present paper, we present a new transpose-free global method for solving large nonsymmetric linear systems with multiple right-hand sides. We first give the scalar polynomial interpretation of the classical global biconjugate gradient algorithm using formal orthogonal polynomials. The global conjugate gradient squared algorithm can be derived by using this. Although related to the transpose...
To increase the security of wireless sensor network, reduce the cost of energies and prolong the lifecycle of the system, a chaos scheme of key predistribution and management was put forward. In this scheme, the chaos over-spread character was used to enlarge the key space and increase the anti-decipher capacity. The chaos initial value sensitivity was used to spend smaller costs while greatly enhanced...
The short-circuit current contribution of wind turbines has not received much attention so far. This paper establishes the doubly fed induction generator mathematical model and carried on corresponding short circuit analysis. Regarding the sudden short circuit process as a superimpose of steady state operation and transient state operation provoked by reverse voltage, stator three-phase short circuit...
In this paper, the characteristics and harm of the impact that natural disasters could make on power system were analyzed. Furthermore, the natural disaster early warning system for power system is proposed, and details of the four parts of the system are introduced respectively. The authors focused on the information sources of early warning monitor, the three steps of risk assessment, the determination...
Power system installed with SSSC is a large-scale nonlinear, indeterminist, multivariable system, and the traditional PI controller has a limited application in some cases because of its non-adaptive parameters. This paper presents the design of a neuron-controller for a SSSC that augments the conventional PI controller. The neuron controller uses adaptive critic design (ACD) with emphasis on dual...
Studying the optimal subsection of distribution networks feeders, a subsection scheme synthesizing load and the length of subsections is presented. Hierarchical data envelopment analysis (DEA) method is proposed for multi-objective evaluation of subsection schemes. First, the scientific assessment system is established by using the analytic hierarchy process (AHP) and the weights of assessment criteria...
The optimization algorithm of allocation problem of mobile emergency generator (MEG) under a certain budget is analyzed in this paper. The classification of loads is discussed firstly, and then the index to describe the severity of the loss of a certain load is obtained. Three hierarchical problems are proposed. By solving one integer programming problem and a dynamic programming problem, three problems...
Loop closing operation in distribution network will brings about steady-state loop current and the transient surge current??Recent papers mainly analyze the theory and calculation method of the steady-state loop current, but seldom discuss the transient surge current, only a rough evaluation presented. This paper fully studys the mechanism of occurrence of the transient surge current and establishs...
Web documents which stored in many existed Web servers include Web pages and many resource files such as audios, videos, photos, etc. They are easy to be modified or replaced without necessary secure mechanism. The paper emphasized on the research and implementation of integrity protection mechanism on Web pages by customized middleware which embedded in Web server. The middleware identified the Web...
A self-learning fuzzy system design and modeling approach based on TSK fuzzy model is proposed in this paper. On the basis of the input-output training data, the nonlinear (membership function) and linear (weighting coefficient) parameters in the IF and THEN part of fuzzy rules were separately optimized by supervised Gaussian learning and steady-state Kalman filter, respectively. Finally, the proposed...
For the purpose of increasing the effectiveness of sensors used for control systems, a new fault detecting and diagnosing algorithm, using in connection with morphological -wavelet analysis, is being proposed. The mathematical characterization of singularities with Lipschitz exponents is explained. With the algorithm, firstly, generalized morphological filter with multi-structure elements is designed...
In this paper, the autoregressive modeling based spectral analysis method is described and its application to spectral analysis of heart rate variability (HRV) signal is evaluated. The assessment of heart rate (HR) spectra aimed at providing meaningful measure of mental workload is also discussed. This work may provide insight into the effect of mental workload on the HRV spectral characteristics.
This paper assesses the operator functional state (OFS) based on a collection of psychophysiological and performance measures. Two types of adaptive fuzzy models, namely ANFIS (adaptive-network-based fuzzy inference system) and GA (genetic algorithm) based Mamdani fuzzy model, are employed to estimate the OFSs under a set of simulated process control tasks involved in an automation-enhanced cabin...
This paper presents a closed-loop combustion control algorithm for a coal-fired boiler using the recently developed output distribution control theory. The furnace temperature distribution (FTD) is regarded as the controlled variable, which demonstrates the stability, economy and reliability of combustion process. Following the FTD obtained by Fluent simulation software, the equivalent B-spline FTD...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.