The Experts below are selected from a list of 288 Experts worldwide ranked by ideXlab platform
Yongping Yang - One of the best experts on this subject based on the ideXlab platform.
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Parametric Analysis and process optimization of steam cycle in double reheat ultra supercritical power plants
Applied Thermal Engineering, 2016Co-Authors: Luyao Zhou, Shifei Zhao, Gang Xu, Cheng Xu, Yongping YangAbstract:Abstract Parametric Analysis and process optimization of steam cycle in double reheat ultra-supercritical power plants were performed in this study. Thermal and economic analyses were presented to reveal the benefits brought from the Parametric Analysis and process optimization. Parametric Analysis of reheat pressure was firstly carried out to improve thermal performance of the double reheat steam cycle with eight-stage regenerative heaters. An optimized process of steam cycle with ten-stage regenerative heaters was put forward to further improve thermal performance of the double reheat power plant. The results showed that the power generation efficiency of the double reheat power plant could increase by 0.49 percentage point by Parametric and process optimization. The economic Analysis revealed that the cost of electricity of the double reheat power plant with both optimized process and parameters will decrease from 49.55 $/MWh to 49.07 $/MWh. This study could indicate that Parametric Analysis and process optimization of the steam cycle can both improve thermal and economic performances of double reheat ultra-supercritical power plants.
Tamás Terlaky - One of the best experts on this subject based on the ideXlab platform.
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Parametric Analysis of semidefinite optimization
Optimization, 2019Co-Authors: Ali Mohammad-nezhad, Tamás TerlakyAbstract:ABSTRACTIn this paper, we study Parametric Analysis of semidefinite optimization problems w.r.t. the perturbation of the objective function. We study the behaviour of the optimal partition and opti...
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Parametric Analysis of semidefinite optimization
arXiv: Optimization and Control, 2018Co-Authors: Ali Mohammad-nezhad, Tamás TerlakyAbstract:In this paper, we study Parametric Analysis of semidefinite optimization problems w.r.t. the perturbation of the objective function. We study the behavior of the optimal partition and optimal set mapping on a so-called nonlinearity interval. Furthermore, we investigate the sensitivity of the approximation of the optimal partition in a nonlinearity interval, which has been recently studied by Mohammad-Nezhad and Terlaky. The approximation of the optimal partition was obtained from a bounded sequence of interior solutions on, or in a neighborhood of the central path. We derive an upper bound on the distance between the approximations of the optimal partitions of the original and perturbed problems. Finally, we examine the theoretical bounds by way of experimentation.
Luyao Zhou - One of the best experts on this subject based on the ideXlab platform.
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Parametric Analysis and process optimization of steam cycle in double reheat ultra supercritical power plants
Applied Thermal Engineering, 2016Co-Authors: Luyao Zhou, Shifei Zhao, Gang Xu, Cheng Xu, Yongping YangAbstract:Abstract Parametric Analysis and process optimization of steam cycle in double reheat ultra-supercritical power plants were performed in this study. Thermal and economic analyses were presented to reveal the benefits brought from the Parametric Analysis and process optimization. Parametric Analysis of reheat pressure was firstly carried out to improve thermal performance of the double reheat steam cycle with eight-stage regenerative heaters. An optimized process of steam cycle with ten-stage regenerative heaters was put forward to further improve thermal performance of the double reheat power plant. The results showed that the power generation efficiency of the double reheat power plant could increase by 0.49 percentage point by Parametric and process optimization. The economic Analysis revealed that the cost of electricity of the double reheat power plant with both optimized process and parameters will decrease from 49.55 $/MWh to 49.07 $/MWh. This study could indicate that Parametric Analysis and process optimization of the steam cycle can both improve thermal and economic performances of double reheat ultra-supercritical power plants.
Marian Wiercigroch - One of the best experts on this subject based on the ideXlab platform.
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Parametric Analysis of a sliding-mode controller to suppress drill-string stick-slip vibration
Meccanica, 2020Co-Authors: Vahid Vaziri, Ibukunolu O. Oladunjoye, Marcin Kapitaniak, Sumeet S. Aphale, Marian WiercigrochAbstract:Despite a significant research effort to understand and mitigate stick-slip in drill-strings, this problem yet to be solved. In this work, a comprehensive Parametric robustness Analysis of the sliding mode controller has hitherto been performed. First, a model verification and extensive Parametric Analysis of the open-loop model is presented. This is followed by a detailed Parametric Analysis of the sliding-mode controller based closed-loop system for two cases, (i) an ideal actuator with no delay or constraint and (ii) a realistic actuator with delay or/and constraint. It is shown that though the proposed controller works robustly across a wide range of parameters, in the absence of delay, it fails in the presence of a delay, thereby limiting its practical application. Experimental results are included to support these claims. This work underlines the importance of including the inherent system characteristics during the control design process. Furthermore, the Parametric Analysis presented here is aimed to act as a blue-print for testing the efficacy of relevant control schemes to be proposed in the future.
V. I. Bykov - One of the best experts on this subject based on the ideXlab platform.
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Parametric Analysis of the Continuous Stirred Tank Reactor Model
Theoretical Foundations of Chemical Engineering, 2003Co-Authors: V. I. Bykov, S. B. TsybenovaAbstract:A Parametric Analysis is carried out for the continuous stirred tank reactor model involving a single exothermic reaction. Local bifurcations of the steady state, including Andronov–Hopf bifurcations, are analyzed for a first-order reaction. The steady-state multiplicity and neutrality lines are described in explicit form for various combinations of dimensionless parameters. Typical Parametric and phase portraits of the dynamic system are presented. Parametric Analysis is also carried out for the n th-order reaction n A → B, the oxidation reaction A + O_2 → B, and an arbitrary kinetic function.
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Parametric Analysis of the mathematical model of a nonisothermal well-stirred reactor
Combustion Explosion and Shock Waves, 1997Co-Authors: V. I. Bykov, E. P. Volokitin, S. A. TreskovAbstract:A Parametric Analysis of the Zel’dovich-Semenov model describing the dynamics of an exothermic reaction in a well-stirred reactor is performed on the basis of bifurcation theory. Bifurcation diagrams that have not been revealed in previous studies are obtained.
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Parametric Analysis of kinetic models, 7. Thermo-kinetic oscillator with autocatalysis
Reaction Kinetics & Catalysis Letters, 1995Co-Authors: T. P. Pushkareva, V. I. BykovAbstract:A Parametric Analysis of the thermo-kinetic model for a reaction on a catalyst surface $$Z \leftrightarrow X,X + 2Z \to 3Z$$ with considerable heat effect is carried out. The bifurcation curves are constructed. The cases of selfoscillation are singled out. The nonlinearity of the kinetic subsystem is analyzed.
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Parametric Analysis of kinetic models. I. The simplest autocatalytic oscillator
Reaction Kinetics & Catalysis Letters, 1992Co-Authors: T. P. Pushkareva, V. I. BykovAbstract:Parametric Analysis of the kinetic model of a catalytic reaction coresponding to the scheme $$Z \rightleftharpoons X, X + 2Z \rightleftharpoons 3Z, Z \rightleftharpoons Y$$ has been carried out. Bifurcative curves — multiplicity and neutrality curves of steady states — have been obtained in the explicit form. The region where oscillations exist has been established.