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Hydromagnetic Carreau Nanoliquid in Frames of Dissipation and Activation Energy

Communications in Theoretical physics 2019年第12期71卷 1416-1424页

作者： M.Waqas Saira Naz T.Hayat M.Ijaz Khan A.Alsaedi NUTECH School of Applied Sciences and Humanities.National University of Technology Islamabad 44000Pakistan departrnent of Mathematics Quaid-I-Azam University 45320Islamabad 44000Pakistan Nonlinear Analysis and Applied Mathematics(NAAM)Research Group Department of MathematicsFaculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia

The novel characteristics of magnetic field and entropy generation in mixed convective flow of Carreau fluid towards a stretched surface are *** nanoliquid model consists of thermophoresis and Brownian movement aspects is opted for *** expression is modeled subject to thermal radiation and viscous dissipation *** by zero mass flux condition is *** of chemical reaction and activation energy characterizes the mass transfer *** entropy generation rate and Bejan number is *** utilization of transformation variables reduces the PDEs into non-linear *** obtained nonlinear complex problems are computed numerically through Shooting *** impact of involved variables like local Weissenberg number,magnetic parameter,thermal radiation parameter,Brownian motion parameter,thermophoresis parameter,buoyancy ratio parameter,mixed convection parameter,Prandtl parameter,Eckert number,Schmidt number,non-dimensional activation energy parameter,chemical reaction parameter,Brinkman number,dimensionless concentration ratio variable,diffusive variable and dimensionless temperature ratio variable on velocity,temperature,nanoparticles concentration,entropy generation,Bejan number,surface drag force and heat transfer rate are examined through graphs and tables.

关键词： carreau nanoliquid entropy generation viscous dissipation activation energy shooting scheme

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Characteristic of the equivalent impedance for an mxn RLC network with an arbitrary boundary

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Frontiers of Information Technology & Electronic Engineering 2017年第12期18卷 2070-2081页

作者： Zhi-zhong TAN Hong ZHU Jihad H.ASAD Chen XU Hua TANG Department of physics Nantong University College of Science Changzhou Institute of Technology Department of physics Palestine Technical University School of Electronics and Information Nantong University Department of physics Yunhe Teachers College

现阶段,精确地计算拓扑网络中任意两节点间等效电阻的技术已经取得较大进展,特别是利用递推-变换(recursion-transform,RT)方法确定含有任意边界的非规则m×n电阻网络的一般等效电阻公式。然而,等效阻抗具有不同于等效电阻的性质,复杂... 详细信息

现阶段,精确地计算拓扑网络中任意两节点间等效电阻的技术已经取得较大进展,特别是利用递推-变换(recursion-transform,RT)方法确定含有任意边界的非规则m×n电阻网络的一般等效电阻公式。然而,等效阻抗具有不同于等效电阻的性质,复杂阻抗网络的研究比电阻网络研究困难得多。基于电阻公式,本文研究了含有任意阻抗边界的非规则m×n阶RLC网络的等效复阻抗问题,并发现等效复阻抗的振荡特性和谐振特性。在RLC网络中,当边界阻抗取得一系列特殊值时,复阻抗公式与外部交流电产生共振。结果表明,该公式可以应用到谐振电路中。

关键词： RLC网络谐振性质振荡特性幅频特性

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Dissipaton equation of motion approach to open quantum systems

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Frontiers of physics 2016年第4期11卷 1-27页

作者： YiJing Yan Jinshuang Jin Rui-Xue Xu Xiao Zheng Hefei National Laboratory for Physical Sciences at the Microscale iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) University of Science and Technology of China Hefei 230026 China Department of Chemistry Hong Kong University of Science and Technology Kowloon Hong Kong China departrnent of physics Hangzhou Normal University Hangzhou 310036 China Hefei National Laboratory for Physical Sciences at the Microscale Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of China Hefei 230026 China

This paper presents a comprehensive account of the dissipaton-equation-of-motion （DEOM） theory for open quantum systems. This newly developed theory treats not only the quantum dissipative systems of primary interest, but also the hybrid enviromnent dynamics that are also experimentally measurable. Despite the fact that DEOM recovers the celebrated hierarchical-equations-of-motion （HEOM） formalism, these two approaches have some fundamental differences. To show these differ- ences, we also scrutinize the HEOM construction via its root at the influence functional path integral formalism. We conclude that many unique features of DEOM are beyond the reach of the HEOM framework. The new DEOM approach renders a statistical quasi-particle picture to account for the environment, which can be either bosonic or fermionic. The review covers the DEOM construction, the physical meanings of dynamical variables, the underlying theorems and dissipaton algebra, and recent numerical advancements for efficient DEOM evaluations of various problems. We also address the issue of high-order many-dissipaton truncations with respect to the invariance principle of quantum mechanics of SchrSdinger versus Heisenberg prescriptions. DEOM serves as a universal tool for characterizing of stationary and dynamic properties of system-and-bath interferences, as highlighted with its real-time evaluation of both linear and nonlinear current noise spectra of nonequilibrium electronic transport.

关键词： quantum dissipation quantum transport entangled system-and-bath dynamics

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