期刊文献+
共找到66篇文章
< 1 2 4 >
每页显示 20 50 100
A high order energy preserving scheme for the strongly coupled nonlinear Schr¨odinger system 被引量:3
1
作者 蒋朝龙 孙建强 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第5期36-40,共5页
A high order energy preserving scheme for a strongly coupled nonlinear Schrōdinger system is roposed by using the average vector field method. The high order energy preserving scheme is applied to simulate the solito... A high order energy preserving scheme for a strongly coupled nonlinear Schrōdinger system is roposed by using the average vector field method. The high order energy preserving scheme is applied to simulate the soliton evolution of the strongly coupled Schrōdinger system. Numerical results show that the high order energy preserving scheme can well simulate the soliton evolution, moreover, it preserves the discrete energy of the strongly coupled nonlinear Schrōdinger system exactly. 展开更多
关键词 average vector field method strongly coupled nonlinear Schrōdinger system energy preservingscheme
下载PDF
On the dielectric response function and dispersion relation in strongly coupled magnetized dusty plasmas 被引量:1
2
作者 M Shahmansouri N Khodabakhshi 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第10期465-470,共6页
Using the generalized viscoelastic fluid model, we derive the dielectric response function in a strongly coupled dusty magnetoplasma which reveals two different dust acoustic(DA) wave modes in the hydrodynamic and k... Using the generalized viscoelastic fluid model, we derive the dielectric response function in a strongly coupled dusty magnetoplasma which reveals two different dust acoustic(DA) wave modes in the hydrodynamic and kinetic limits. The effects of the strong interaction of dust grains and the external magnetic on these DA modes, as well as on the shear wave are examined. It is found that both the real and imaginary parts of DA waves are significantly modified in strongly coupled dusty magnetoplasmas. The implications of our results to space and laboratory dusty plasmas are briefly discussed. 展开更多
关键词 dusty plasma strongly coupled plasma MAGNETOPLASMA dielectric response function
下载PDF
Coexistence of a Strongly Coupled Prey-predator Model for Holling's Type Ⅲ 被引量:1
3
作者 黄优良 张来 房少梅 《Chinese Quarterly Journal of Mathematics》 CSCD 2009年第3期389-393,共5页
In this paper, the two-species prey-predator Lotka-Volterra model with the Holling's type III is discussed. By the method of coupled upper and lower solutions and its associated monotone iterations, the existence of ... In this paper, the two-species prey-predator Lotka-Volterra model with the Holling's type III is discussed. By the method of coupled upper and lower solutions and its associated monotone iterations, the existence of solutions for a strongly coupled elliptic system with homogeneous of Dirchlet boundary conditions is derived. These results show that this model admits at least one coexistence state if across-diffusions are weak. 展开更多
关键词 reaction diffusion system strongly coupled COEXISTENCE
下载PDF
On the Uniqueness of the Limiting Solution to a Strongly Coupled Singularly Perturbed Elliptic System
4
作者 Lu Liu Shan Zhang 《Applied Mathematics》 2022年第5期419-431,共13页
This article is concerned with a strongly coupled elliptic system modeling the steady state of two or more populations that compete in some regions. We prove the uniqueness of the limiting configuration as the competi... This article is concerned with a strongly coupled elliptic system modeling the steady state of two or more populations that compete in some regions. We prove the uniqueness of the limiting configuration as the competing rate tends to infinity, under suitable conditions. The proof relies on properties of limiting solution and Maximum principle. 展开更多
关键词 UNIQUENESS Spatial Segregation strongly coupled Elliptic System Free Boundary Problems
下载PDF
GLOBAL EXISTENCE OF SOLUTIONS FOR A STRONGLY COUPLED REACTION-DIFFUSION SYSTEM
5
作者 江成顺 李海峰 《Acta Mathematica Scientia》 SCIE CSCD 1998年第1期1-10,共10页
This paper is concerned with an Initial Boundary Value Problem (IBVP) for a strongly coupled semilinear reaction-diffusion system. By using the upper and lower solutions method and Leray-Schauder fixed point theorem a... This paper is concerned with an Initial Boundary Value Problem (IBVP) for a strongly coupled semilinear reaction-diffusion system. By using the upper and lower solutions method and Leray-Schauder fixed point theorem and so on, the authors prove the global existence and uniqueness of a. smooth. solution for this IBVP under some appropriate conditions. 展开更多
关键词 strongly coupled reaction-diffusion system global smooth solution upper and lower solutions Leray-Schauder fixed point theorem
全文增补中
Strongly Gain Coupled DFB Laser Monolithically Integrated with a Self Alignment Spot Size Converter 被引量:1
6
作者 刘国利 王圩 +4 位作者 朱洪亮 张静媛 周帆 汪孝杰 胡小华 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2001年第7期832-836,共5页
A new type strongly gain coupled (GC) DFB laser and a new type self alignment spot size converter (SA SSC) are proposed and successfully fabricated.The strongly GC DFB laser is monolithically integrated with the ... A new type strongly gain coupled (GC) DFB laser and a new type self alignment spot size converter (SA SSC) are proposed and successfully fabricated.The strongly GC DFB laser is monolithically integrated with the SA SSC with three step epitaxies.A high single mode yield and large side mode suppression ratio is obtained from the strongly GC DFB laser.A near circle far field pattern is obtained by using the SA SSC. 展开更多
关键词 strongly gain coupled DFB laser spot size converter monolithic integration
下载PDF
Global Existence and Nonexistence for a Strongly Coupled Parabolic System with Nonlinear Boundary Conditions 被引量:1
7
作者 You Peng CHEN Chun Hong XIE 《Acta Mathematica Sinica,English Series》 SCIE CSCD 2006年第5期1297-1304,共8页
This paper deals with the strongly coupled parabolic system ut = v^m△u, vt = u^n△v, (x, t) ∈Ω × (0,T) subject to nonlinear boundary conditions 偏du/偏dη = u^αv^p, 偏du/偏dη= u^qv^β, (x, t) ∈ 偏dΩ ... This paper deals with the strongly coupled parabolic system ut = v^m△u, vt = u^n△v, (x, t) ∈Ω × (0,T) subject to nonlinear boundary conditions 偏du/偏dη = u^αv^p, 偏du/偏dη= u^qv^β, (x, t) ∈ 偏dΩ × (0, T), where Ω 包含 RN is a bounded domain, m, n are positive constants and α,β, p, q are nonnegative constants. Global existence and nonexistence of the positive solution of the above problem are studied and a new criterion is established. It is proved that the positive solution of the above problem exists globally if and only if α 〈 1,β 〈 1 and (m +p)(n + q) ≤ (1 - α)(1 -β). 展开更多
关键词 strongly coupled Global existence Finite time blow-up Upper and lower solutions
原文传递
Modified Potential Around a Moving Test Charge in Strongly Coupled Dusty Plasma 被引量:1
8
作者 M. Shahmansouri B.Farokhi N. Khodabakhshi 《Communications in Theoretical Physics》 SCIE CAS CSCD 2017年第7期111-116,共6页
The theory of dynamical (wa&e) potential behind a moving test charge in a weakly coupled dusty plasma is extended to that including of strong interaction between dust grains. Such strong interaction is included in ... The theory of dynamical (wa&e) potential behind a moving test charge in a weakly coupled dusty plasma is extended to that including of strong interaction between dust grains. Such strong interaction is included in the dielectric response function by a generalized hydrodynamic (GH) fluid model. It is shown that the strong interaction between dusts including the lattice spacing correction has a significant effect on the wake potential in dusty plasma. This may be used to investigate basic features of phase transition and possibility of lattice formation of dusty plasma. 展开更多
关键词 dusty plasma strongly coupled plasma generalized hydrodynamic fluid model
原文传递
Algorithm Selection Method Based on Coupling Strength for Partitioned Analysis of Structure-Piezoelectric-Circuit Coupling
9
作者 Daisuke Ishihara Naoto Takayama 《Computer Modeling in Engineering & Sciences》 SCIE EI 2024年第2期1237-1258,共22页
In this study, we propose an algorithm selection method based on coupling strength for the partitioned analysis ofstructure-piezoelectric-circuit coupling, which includes two types of coupling or inverse and direct pi... In this study, we propose an algorithm selection method based on coupling strength for the partitioned analysis ofstructure-piezoelectric-circuit coupling, which includes two types of coupling or inverse and direct piezoelectriccoupling and direct piezoelectric and circuit coupling. In the proposed method, implicit and explicit formulationsare used for strong and weak coupling, respectively. Three feasible partitioned algorithms are generated, namely(1) a strongly coupled algorithm that uses a fully implicit formulation for both types of coupling, (2) a weaklycoupled algorithm that uses a fully explicit formulation for both types of coupling, and (3) a partially stronglycoupled and partially weakly coupled algorithm that uses an implicit formulation and an explicit formulation forthe two types of coupling, respectively.Numerical examples using a piezoelectric energy harvester,which is a typicalstructure-piezoelectric-circuit coupling problem, demonstrate that the proposed method selects the most costeffectivealgorithm. 展开更多
关键词 MULTIPHYSICS coupling strength partitioned algorithm structure-piezoelectric-circuit coupling strongly coupled algorithm weakly coupled algorithm
下载PDF
Strong coupling and catenary field enhancement in the hybrid plasmonic metamaterial cavity and TMDC monolayers 被引量:2
10
作者 Andergachew Mekonnen Berhe Khalil As’ham +2 位作者 Ibrahim Al-Ani Haroldo T.Hattori Andrey E.Miroshnichenko 《Opto-Electronic Advances》 SCIE EI CAS CSCD 2024年第5期20-32,共13页
Strong coupling between resonantly matched surface plasmons of metals and excitons of quantum emitters results in the formation of new plasmon-exciton hybridized energy states.In plasmon-exciton strong coupling,plasmo... Strong coupling between resonantly matched surface plasmons of metals and excitons of quantum emitters results in the formation of new plasmon-exciton hybridized energy states.In plasmon-exciton strong coupling,plasmonic nanocavities play a significant role due to their ability to confine light in an ultrasmall volume.Additionally,two-dimensional transition metal dichalcogenides(TMDCs) have a significant exciton binding energy and remain stable at ambient conditions,making them an excellent alternative for investigating light-matter interactions.As a result,strong plasmon-exciton coupling has been reported by introducing a single metallic cavity.However,single nanoparticles have lower spatial confinement of electromagnetic fields and limited tunability to match the excitonic resonance.Here,we introduce the concept of catenary-shaped optical fields induced by plasmonic metamaterial cavities to scale the strength of plasmon-exciton coupling.The demonstrated plasmon modes of metallic metamaterial cavities offer high confinement and tunability and can match with the excitons of TMDCs to exhibit a strong coupling regime by tuning either the size of the cavity gap or thickness.The calculated Rabi splitting of Au-MoSe_2 and Au-WSe_2 heterostructures strongly depends on the catenary-like field enhancement induced by the Au cavity,resulting in room-temperature Rabi splitting ranging between 77.86 and 320 me V.These plasmonic metamaterial cavities can pave the way for manipulating excitons in TMDCs and operating active nanophotonic devices at ambient temperature. 展开更多
关键词 catenary-shaped field enhancement strong coupling PLASMON EXCITON Rabi splitting
下载PDF
Coupling and characterization of a Si/SiGe triple quantum dot array with a microwave resonator
11
作者 Shun-Li Jiang Tian-Yi Jiang +8 位作者 Yong-Qiang Xu Rui Wu Tian-Yue Hao Shu-Kun Ye Ran-Ran Cai Bao-Chuan Wang Hai-Ou Li Gang Cao Guo-Ping Guo 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第9期139-143,共5页
Scaling up spin qubits in silicon-based quantum dots is one of the pivotal challenges in achieving large-scale semiconductor quantum computation.To satisfy the connectivity requirements and reduce the lithographic com... Scaling up spin qubits in silicon-based quantum dots is one of the pivotal challenges in achieving large-scale semiconductor quantum computation.To satisfy the connectivity requirements and reduce the lithographic complexity,utilizing the qubit array structure and the circuit quantum electrodynamics(cQED)architecture together is expected to be a feasible scaling scheme.A triple-quantum dot(TQD)coupled with a superconducting resonator is regarded as a basic cell to demonstrate this extension scheme.In this article,we investigate a system consisting of a silicon TQD and a high-impedance TiN coplanar waveguide(CPW)resonator.The TQD can couple to the resonator via the right double-quantum dot(RDQD),which reaches the strong coupling regime with a charge–photon coupling strength of g0/(2p)=175 MHz.Moreover,we illustrate the high tunability of the TQD through the characterization of stability diagrams,quadruple points(QPs),and the quantum cellular automata(QCA)process.Our results contribute to fostering the exploration of silicon-based qubit integration. 展开更多
关键词 triple-quantum dot strong coupling circuit quantum electrodynamics(cQED) scalable siliconbased cQED architectures
下载PDF
Importance of Three-Dimensional Piezoelectric Coupling Modeling in Quantitative Analysis of Piezoelectric Actuators 被引量:1
12
作者 Daisuke Ishihara Prakasha Chigahalli Ramegowda +1 位作者 Shoichi Aikawa Naoki Iwamaru 《Computer Modeling in Engineering & Sciences》 SCIE EI 2023年第8期1187-1206,共20页
This paper demonstrates the importance of three-dimensional(3-D)piezoelectric coupling in the electromechanical behavior of piezoelectric devices using three-dimensional finite element analyses based on weak and stron... This paper demonstrates the importance of three-dimensional(3-D)piezoelectric coupling in the electromechanical behavior of piezoelectric devices using three-dimensional finite element analyses based on weak and strong coupling models for a thin cantilevered piezoelectric bimorph actuator.It is found that there is a significant difference between the strong and weak coupling solutions given by coupling direct and inverse piezoelectric effects(i.e.,piezoelectric coupling effect).In addition,there is significant longitudinal bending caused by the constraint of the inverse piezoelectric effect in the width direction at the fixed end(i.e.,3-D effect).Hence,modeling of these effects or 3-D piezoelectric coupling modeling is an electromechanical basis for the piezoelectric devices,which contributes to the accurate prediction of their behavior. 展开更多
关键词 Piezoelectric coupling effect piezoelectric bimorph actuator weak coupling strong coupling three-dimensional finite element analysis
下载PDF
Uniqueness and Least Energy Property for Solutions to a Strongly Coupled Elliptic System 被引量:1
13
作者 Shan ZHANG Ling ZHOU Zu Han LIU 《Acta Mathematica Sinica,English Series》 SCIE CSCD 2017年第3期419-438,共20页
For the strongly coupled system of M ≥ 3 competing species:-△[(di+∑j=1^Mβijuj)ui]=(ai-bi)ui-kui∑j≠iui,i=1,…,M,we prove the uniqueness of the limiting configuration as k →∞ under suitable conditions. Mor... For the strongly coupled system of M ≥ 3 competing species:-△[(di+∑j=1^Mβijuj)ui]=(ai-bi)ui-kui∑j≠iui,i=1,…,M,we prove the uniqueness of the limiting configuration as k →∞ under suitable conditions. Moreover, we prove that the limiting configuration minimizes a variational problem associated to the strongly coupled system among the segregated states with the same boundary conditions. 展开更多
关键词 strongly coupled elliptic system UNIQUENESS spatial segregation
原文传递
PARAMETERS IDENTIFICATION IN A SALTWATER INTRUSION PROBLEM
14
作者 Ji LI Carole ROSIER 《Acta Mathematica Scientia》 SCIE CSCD 2020年第5期1563-1584,共22页
This article is devoted to the identification, from observations or field measurements, of the hydraulic conductivity K for the saltwater intrusion problem in confined aquifers. The involved PDE model is a coupled sys... This article is devoted to the identification, from observations or field measurements, of the hydraulic conductivity K for the saltwater intrusion problem in confined aquifers. The involved PDE model is a coupled system of nonlinear parabolic-elliptic equations completed by boundary and initial conditions. The main unknowns are the saltwater/freshwater interface depth and the freshwater hydraulic head. The inverse problem is formulated as an optimization problem where the cost function is a least square functional measuring the discrepancy between experimental data and those provided by the model.Considering the exact problem as a constraint for the optimization problem and introducing the Lagrangian associated with the cost function, we prove that the optimality system has at least one solution. Moreover, the first order necessary optimality conditions are established for this optimization problem. 展开更多
关键词 parameters identification optimization problem strongly coupled system nonlinear parabolic equations seawater intrusion
下载PDF
Bicharacteristic Curves in Modeling of the Earth Crust and Upper Mantle
15
作者 Georgi Boyadzhiev 《Journal of Mathematics and System Science》 2014年第3期167-172,共6页
The aim of this paper is the introduction of a new approach to 3D modelling of elastic piecewise homogeneous media, in particular Earth crust and upper Mantle. The method is based on the principle of tomography with E... The aim of this paper is the introduction of a new approach to 3D modelling of elastic piecewise homogeneous media, in particular Earth crust and upper Mantle. The method is based on the principle of tomography with Earthquake as a source of the signal and receiver stations on the surface. The wave propagation in solid media is described by a system of three strongly coupled hyperbolic equations with piece - wise constant coefitients. The characteristic set and hi-characteristic curves of this system are computed in a homogeneous half-space with free boundary and the formulae of reflection and diffraction of the hi-characteristics on the internal boundaries of the media. Applications of the characteristic set and bi-eharacteristic curves for the inverse problem in geophysics and Earth modelling are given. 展开更多
关键词 3D modeling of Lithosphere BICHARACTERISTICS strongly coupled linear systems of PDE
下载PDF
A review of nanocarbons in energy electrocatalysis: Multifunctional substrates and highly active sites 被引量:16
16
作者 Cheng Tang Maria-Magdalena Titirici Qiang Zhang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2017年第6期1077-1093,共17页
Nanocarbons are of progressively increasing importance in energy electrocatalysis, including oxygen reduction, oxygen evolution, hydrogen evolution, COreduction, etc. Precious-metal-free or metal-free nanocarbon-based... Nanocarbons are of progressively increasing importance in energy electrocatalysis, including oxygen reduction, oxygen evolution, hydrogen evolution, COreduction, etc. Precious-metal-free or metal-free nanocarbon-based electrocatalysts have been revealed to potentially have effective activity and remarkable durability, which is promising to replace precious metals in some important energy technologies,such as fuel cells, metal–air batteries, and water splitting. In this review, rather than overviewing recent progress completely, we aim to give an in-depth digestion of present achievements, focusing on the different roles of nanocarbons and material design principles. The multifunctionalities of nanocarbon substrates(accelerating the electron and mass transport, regulating the incorporation of active components,manipulating electron structures, generating confinement effects, assembly into 3 D free-standing electrodes) and the intrinsic activity of nanocarbon catalysts(multi-heteroatom doping, hierarchical structure,topological defects) are discussed systematically, with perspectives on the further research in this rising research field. This review is inspiring for more insights and methodical research in mechanism understanding, material design, and device optimization, leading to a targeted and high-efficiency development of energy electrocatalysis. 展开更多
关键词 NANOCARBON Energy electrocatalysis Oxygen reduction Oxygen evolution Hydrogen evolution CO_2 reduction Electron structure Strong coupling effect Hierarchical structure DOPING Defect Metal–air battery Fuel cell Water splitting
下载PDF
Energy Levels of Strong Coupling Magnetopolaron in Quantum Dot 被引量:16
17
作者 ZHouHai-yang GUShi-wei 《Journal of Shanghai University(English Edition)》 CAS 2001年第1期40-43,共4页
By using variational method of Pekar type, we have studied the energy levels of strong coupling magnetopolaron in disk shape quantum dot(QD) and quantum well(QW). Our results show that, with the increasing magnetic f... By using variational method of Pekar type, we have studied the energy levels of strong coupling magnetopolaron in disk shape quantum dot(QD) and quantum well(QW). Our results show that, with the increasing magnetic field and confinement strength, the magnetopolaron binding energy of QD and QW in the ground state and in the excited state is enhanced. The limiting results of bulk type and strict two dimensional type are obtained. 展开更多
关键词 quantum dot strong coupling MAGNETOPOLARON
下载PDF
Size and Magnetic Field Dependence of Strong Coupling Magnetopolaron in Quantum Dot 被引量:7
18
作者 Zhou Haiyang(Collage of Sciences, Shanghai University) Gu Shiwei(Shanghai Jiaotong University) 《Advances in Manufacturing》 SCIE CAS 1999年第2期43-47,共5页
By using the variational method of Pekar type, the ground state and the first excited state of the strong coupling magnetopolaron in cylinder shape quantum dot are considered. The results show that, with the increasi... By using the variational method of Pekar type, the ground state and the first excited state of the strong coupling magnetopolaron in cylinder shape quantum dot are considered. The results show that, with the increasing cyclotron frequency and the confinement strength, the magnetopolaron binding energies in both the ground state and the excited state, and the resonance frequency of magnetopolaron are enhanced. The limiting case of the bulk and strict one dimensional type is also discussed. 展开更多
关键词 quantum dot strong coupling MAGNETOPOLARON
下载PDF
A Superaerophobic Bimetallic Selenides Heterostructure for Efficient Industrial-Level Oxygen Evolution at Ultra-High Current Densities 被引量:6
19
作者 Jiaxin Yuan Xiaodi Cheng +8 位作者 Hanqing Wang Chaojun Lei Sameer Pardiwala Bin Yang Zhongjian Li Qinghua Zhang Lecheng Lei Shaobin Wang Yang Hou 《Nano-Micro Letters》 SCIE EI CAS CSCD 2020年第8期213-224,共12页
Cost-effective and stable electrocatalysts with ultra-high current densities for electrochemical oxygen evolution reaction(OER)are critical to the energy crisis and environmental pollution.Herein,we report a superaero... Cost-effective and stable electrocatalysts with ultra-high current densities for electrochemical oxygen evolution reaction(OER)are critical to the energy crisis and environmental pollution.Herein,we report a superaerophobic three dimensional(3D)heterostructured nanowrinkles of bimetallic selenides consisting of crystalline NiSe2 and NiFe2Se4 grown on NiFe alloy(NiSe2/NiFe2Se4@NiFe)prepared by a thermal selenization procedure.In this unique 3D heterostructure,numerous nanowrinkles of NiSe2/NiFe2Se4 hybrid with a thickness of ~100 nm are grown on NiFe alloy in a uniform manner.Profiting by the large active surface area and high electronic conductivity,the superaerophobic NiSe2/NiFe2Se4@NiFe heterostructure exhibits excellent electrocatalytic activity and durability towards OER in alkaline media,outputting the low potentials of 1.53 and 1.54 V to achieve ultra-high current densities of 500 and 1000 mA cm^−2,respectively,which is among the most active Ni/Fe-based selenides,and even superior to the benchmark Ir/C catalyst.The in-situ derived FeOOH and NiOOH species from NiSe2/NiFe2Se4@NiFe are deemed to be efficient active sites for OER. 展开更多
关键词 Superaerophobicity Bimetallic selenide Heterostructure electrocatalyst Strong interfacial coupling Oxygen evolution reaction
下载PDF
Cavity optomechanics: Manipulating photons and phonons towards the single-photon strong coupling 被引量:2
20
作者 刘玉龙 王冲 +1 位作者 张靖 刘玉玺 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第2期166-183,共18页
Cavity optomechanical systems provide powerful platforms to manipulate photons and phonons, open potential ap- plications for modern optical communications and precise measurements. With the refrigeration and ground-s... Cavity optomechanical systems provide powerful platforms to manipulate photons and phonons, open potential ap- plications for modern optical communications and precise measurements. With the refrigeration and ground-state cooling technologies, studies of cavity optomechanics are making significant progress towards the quantum regime including non- classical state preparation, quantum state tomography, quantum information processing, and future quantum internet. With further research, it is found that abundant physical phenomena and important applications in both classical and quan- tum regimes appeal as they have a strong optomechanical nonlinearity, which essentially depends on the single-photon optomechanical coupling strength. Thus, engineering the optomechanical interactions and improving the single-photon optomechanical coupling strength become very important subjects. In this article, we first review several mechanisms, theoretically proposed for enhancing optomechanical coupling. Then, we review the experimental progresses on enhancing optomechanical coupling by optimizing its structure and fabrication process. Finally, we review how to use novel structures and materials to enhance the optomechanical coupling strength. The manipulations of the photons and phonons at the level of strong optomechanical coupling are also summarized. 展开更多
关键词 optomechanical systems single-photon strong coupling controllable photons and phonons trans-port
下载PDF
上一页 1 2 4 下一页 到第
使用帮助 返回顶部