The Experts below are selected from a list of 315 Experts worldwide ranked by ideXlab platform
Quntao Zhuang - One of the best experts on this subject based on the ideXlab platform.
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quantum thermalization and Equilibrium State with multiple temperatures
Laser Physics Letters, 2014Co-Authors: Quntao ZhuangAbstract:A large class of isolated quantum systems in a pure State can equilibrate and serve as a heat bath. We show that, once Equilibrium is reached, any of its subsystems, which are much smaller than the isolated system, can be thermalized such that the subsystem is governed by the Gibbs distribution. Within this theoretical framework, the celebrated superposition principle of quantum mechanics leads to a prediction of a thermalized subsystem with multiple temperatures when the isolated system is in a superposition State of energy eigenStates of multiple distinct energy scales. This multiple-temperature State is at Equilibrium, completely different from a non-Equilibrium State that has multiple temperatures at different parts. Feasible experimental schemes, in particular with ultra-cold atoms, to verify this prediction are discussed.
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quantum thermalization and Equilibrium State with multiple temperatures
arXiv: Statistical Mechanics, 2012Co-Authors: Quntao ZhuangAbstract:A large class of isolated quantum system in a pure State can equilibrate and serve as a heat bath. We show that once the Equilibrium is reached, any of its subsystems that is much smaller than the isolated system is thermalized such that the subsystem is governed by the Gibbs distribution. Within this theoretical framework, the celebrated superposition principle of quantum mechanics leads to a prediction of a thermalized subsystem with multiple temperatures when the isolated system is in a superposition State of energy eigenStates of multiple distinct energy scales. This multiple-temperature State is at Equilibrium, completely different from a non-Equilibrium State that has multiple temperatures at different parts. Feasible experimental schemes to verify this prediction are discussed.
Akihiko Mizutani - One of the best experts on this subject based on the ideXlab platform.
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Cell geometry effect on Equilibrium State of nuclear reactors
Progress in Nuclear Energy, 1998Co-Authors: Akihiko Mizutani, Hiroshi SekimotoAbstract:The effects of the cell configuration on core performance for a liquid sodium cooled MOX fuel type fast reactor and a PWR type thermal reactor are investigated. In this study our Equilibrium cell iterative calculation system (ECICS) are used in order to obtain consistent neutron spectra, one-group constants and nuclide number densities at the nuclear Equilibrium State. The fuel pellet diameter and the pin pitch are changed to evaluate their core characteristics. The distinction of reactors at the Equilibrium State appears clearly by means of the change in the cell geometrical design.
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Sensitivities of Some Characteristics of Nuclear Equilibrium State to One-Group Constants
Journal of Nuclear Science and Technology, 1997Co-Authors: Hiroshi Sekimoto, Hiroki Nakamura, Akihiko MizutaniAbstract:In the nuclear Equilibrium State, the nuclide densities and h-value (a neutron balance index) can be estimated from one-group nuclear constants. One-group cross sections usually contain some uncertainties originated from nuclear data errors, analysis errors and design uncertainties. The method to obtain sensitivity coefficients of nuclide densities and h-value to one-group constants are derived by the use of perturbation method, and some numerical results are obtained for both fast and thermal reactors. The numerical results show several notable characteristics. It is appeared that many of these characteristics can be explained using only the main nuclide chain. The method developed in this paper, some derived characteristics and/or numerical results for typical reactors may be useful for future studies based on the nuclear Equilibrium State.
Hiroshi Sekimoto - One of the best experts on this subject based on the ideXlab platform.
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Cell geometry effect on Equilibrium State of nuclear reactors
Progress in Nuclear Energy, 1998Co-Authors: Akihiko Mizutani, Hiroshi SekimotoAbstract:The effects of the cell configuration on core performance for a liquid sodium cooled MOX fuel type fast reactor and a PWR type thermal reactor are investigated. In this study our Equilibrium cell iterative calculation system (ECICS) are used in order to obtain consistent neutron spectra, one-group constants and nuclide number densities at the nuclear Equilibrium State. The fuel pellet diameter and the pin pitch are changed to evaluate their core characteristics. The distinction of reactors at the Equilibrium State appears clearly by means of the change in the cell geometrical design.
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Sensitivities of Some Characteristics of Nuclear Equilibrium State to One-Group Constants
Journal of Nuclear Science and Technology, 1997Co-Authors: Hiroshi Sekimoto, Hiroki Nakamura, Akihiko MizutaniAbstract:In the nuclear Equilibrium State, the nuclide densities and h-value (a neutron balance index) can be estimated from one-group nuclear constants. One-group cross sections usually contain some uncertainties originated from nuclear data errors, analysis errors and design uncertainties. The method to obtain sensitivity coefficients of nuclide densities and h-value to one-group constants are derived by the use of perturbation method, and some numerical results are obtained for both fast and thermal reactors. The numerical results show several notable characteristics. It is appeared that many of these characteristics can be explained using only the main nuclide chain. The method developed in this paper, some derived characteristics and/or numerical results for typical reactors may be useful for future studies based on the nuclear Equilibrium State.
Li Wang - One of the best experts on this subject based on the ideXlab platform.
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the nonlinear system design technique based on dynamic Equilibrium State theory
International Conference on Innovative Computing Information and Control, 2007Co-Authors: Li WangAbstract:The nonlinear system design technique based on the dynamic Equilibrium State theory is a new design technique based on the concept of the asymptotically stability of the control system dynamic Equilibrium State. It first designs a referenced system according to a given performance, then takes the State of the referenced system as the dynamic Equilibrium State of the original control system, designs a control law to make the system State move to its dynamic Equilibrium in a scheduled way. When apply this method in the design of nonlinear tracking, the design process is straightforward and the simulation result is right, and the meanings of the dynamic Equilibrium State can also be deeply understood.
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the nonlinear system tracking design based on the dynamic Equilibrium State theory
Chinese Control Conference, 2006Co-Authors: Li Wang, Qinglin WangAbstract:The nonlinear system design technique based on the dynamic Equilibrium State theory is a new design technique based on the concept of the asymptotically stability of the control system dynamic Equilibrium State. It first designs a referenced system according to a given performance, then takes the State of the referenced system as the dynamic Equilibrium State of the original control system, designs a control law to make the system State move to its dynamic Equilibrium in a scheduled way. When this method is applied in the design of nonlinear tracking, the design process is straightforward and the simulation result is right, and the meanings of the dynamic Equilibrium State can be deeply understood.
Qing-song Zuo - One of the best experts on this subject based on the ideXlab platform.
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Effects of exhaust parameters on temperature and pressure drop of the gasoline particulate filter in the regeneration Equilibrium State
Fuel, 2019Co-Authors: Qing-song Zuo, Bin Zhang, Xinning Zhu, Jianping Zhang, Yuanyou Tang, Yong Xie, Xiaoteng Zhang, Guohui Zhu, Zhiqi WangAbstract:Abstract In order to investigate the exhaust parameters how to influence the particulate purification performance of the gasoline particulate filter (GPF), the importance of exhaust parameters on the temperature and pressure drop in the regeneration Equilibrium State of the gasoline particulate filter is studied by using the numerical simulation software FLUENT. The distribution law of optimal temperature in the regeneration Equilibrium State and pressure growth rate of the gasoline particulate filter under different exhaust parameters is analyzed, and the numerical simulation results are compared with the experimental values of the literature to verify the accuracy of the numerical research. The main results are presented as follows: (1) The temperature and pressure drop in the regeneration Equilibrium State is decreased by 2.1% and 6.4% when α value is increased from 4 to 8, respectively. (2) The temperature and pressure drop in the regeneration Equilibrium State is increased by 2.7% and 26.5% when the exhaust temperature is increased from 400 K to 500 K, respectively. (3) The temperature in the regeneration Equilibrium State is increased by 2.5%, and the pressure drop is increased by 12.3 times when the exhaust flow rate is increased from 0.001 kg/s to 0.01 kg/s. Finally, the results of the orthogonal experiment show that the exhaust temperature has the most significant influence on the temperature in the regeneration Equilibrium State, and the exhaust flow rate has the most significant impact on the pressure drop in the regeneration Equilibrium State.
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Influence of geometric characteristics of a diesel particulate filter on its behavior in Equilibrium State
Applied Thermal Engineering, 2017Co-Authors: Yuanwang Deng, Wenping Zheng, Qing-song Zuo, Xiaohuan Zhao, E Jiaqiang, Zhiqing Zhang, Bin Zhang, Dandan HanAbstract:In order to enhance behaviors of the diesel particulate filter (DPF) in Equilibrium State, a mathematic model of pressure drop in the DPF in Equilibrium State is developed to investigate effects of key parameters on its behavior in Equilibrium State. Therefore, the impacts of factors on soot mass in the DPF in Equilibrium State, pressure drop in the DPF in Equilibrium State and oxidation rate are evaluated by the improved fuzzy grey relational analysis method. And some useful results such as fuzzy grey correlation coefficient of different effect factors in Equilibrium State of the diesel particulate filter in the process of continuous regeneration and change laws of soot mass and pressure drop in the DPF in Equilibrium State based on different geometric parameters are obtained. Smaller diameter of the DPF will result in larger pressure drop in the DPF and more complications for the length of the filter in Equilibrium State. The optimum length of the filter may not necessarily be the smallest possible, sometimes depending on diameter of the filter in Equilibrium State. Larger wall thickness and smaller channel diameter cause more soot mass in the DPF in Equilibrium State. This work will provide relative reference values when the diesel particulate filter is chosen or designed to match the CRT system.
