Showing 4,841 - 4,860 results of 6,894 for search '"Nonlinearity"', query time: 0.05s Refine Results
  1. 4841

    Self-organization through decoupling by Romar Correa

    Published 2000-01-01
    “…Formally, a conditionally stable nonlinear system of differential equations is examined. …”
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  2. 4842

    The Comprehensive Study of Electrical Faults in PV Arrays by M. Sabbaghpur Arani, M. A. Hejazi

    Published 2016-01-01
    “…Due to the current-limiting nature and nonlinear output characteristics of PV arrays, faults in PV arrays may not be detected. …”
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  3. 4843

    Multi-channel QoT prediction method in wide-area optical backbone network based on ensemble learning by Xiaochuan SUN, Zhigang LI, Minghui ZHANG, Guan GUI

    Published 2020-09-01
    “…Due to the fact that in dynamic wide-area optical backbone network the accuracies of the existing prediction methods were insufficient,a novel prediction method on quality of transmission (QoT) of optical channel was proposed based on ensemble learning theory.Firstly,under the framework of stacked ensemble learning,a base-learner including five multilayer perceptron (MLP) model was built,which could achieve homomorphic ensemble learning of sample data through parallel combination.Subsequently,the new training set fused from the predicted results of the preceding base-learner was used to training the meta-learner composed of a single MLP.The simulation results show that compared with the used deep neural network,the proposed method can obtain a more excellent nonlinear approximation in the scenarios of the single-channel and multi-channels,and the prediction accuracies have the improvements of 1.93% and 3.82% respectively.…”
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  4. 4844

    Seismic Stability Analysis of Saturated and Unsaturated Soil Slopes Using Permanent Displacement by Shuai Huang, Yanju Peng

    Published 2018-01-01
    “…Then, based on the proposed calculation method of dynamic pore water pressure combined with the limit equilibrium and finite element methods, we introduce a simple calculation method of permanent displacement, which avoids solving complex nonlinear equations and greatly simplifies the computational effort. …”
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  5. 4845

    Simulation of the Electro-hydraulic Control of Wet Clutch Actuator by Zhang Zengliang

    Published 2015-01-01
    “…To the problems of strong nonlinear,time delay and lower control accuracy of wet clutch actuator,an automobile automatic transmission with wet clutch actuator is studied,according to the characteristics of the wet clutch and control strategy requirement,a wet clutch electro-hydraulic actuator control model is established,the simulation is carried out with Matlab/Simulink software.The results show that the charge phase,the displacement of electric hydraulic valve plunger and clutch,the clutch flow to achieve maximum positive displacement first,and gradually decreases stabilized.In the discharge phase,the displacement of electric hydraulic valve plunger and clutch,the clutch flow to achieve maximum negative displacement first,and gradually increased to stabilize,and the overall trend is consistent with the input current.In different times have different average delay time,and the delay time will reduce the control precision control of systems.The different control accuracy generate in different controllers and predictive control policies.…”
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  6. 4846

    A Bright Entanglement and Squeezing Generated by an External Pumping Radiation in a Correlated Emission Laser by Chimdessa Gashu

    Published 2020-01-01
    “…It is found that pumping atoms from the lower energy state to excited state, introducing the nonlinear crystal into the cavity and coupling the system to a biased noise fluctuation, generate a bright and strong squeezing and entanglement with enhanced statistical properties although the atoms are initially in the ground state.…”
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  7. 4847
  8. 4848

    Probability Density Evolution Algorithm for Stochastic Dynamical Systems Based on Fractional Calculus by Yang Yan, Xiaohong Yu

    Published 2021-01-01
    “…For that, a new efficient and accurate method is used in this paper, suitable for linear and nonlinear random vibration analysis of large structures as well as static and dynamic reliability assessment. …”
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  9. 4849

    Numerical modelling of intergranular fracture in polycrystalline materials and grain size effects by M. Paggi, P. Wriggers

    Published 2013-04-01
    “…In this paper, the phenomenon of intergranular fracture in polycrystalline materials is investigated using a nonlinear fracture mechanics approach. The nonlocal cohesive zone model (CZM) for finite thickness interfaces recently proposed by the present authors is used to describe the phenomenon of grain boundary separation. …”
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  10. 4850
  11. 4851

    Resource management in blockchain-enabled heterogeneous edge computing system by Ping ZHANG, Shilin LI, Yiming LIU, Xiaoqi QIN, Xiaodong XU

    Published 2020-10-01
    “…In blockchain-enabled mobile edge computing (BMEC) systems,a new class of blockchain application related computation tasks was introduced to the system.Due to the differences of parallelism among computation tasks,heterogenous computing framework was introduced to suitably split various computation tasks on processors with vastly different processing power to achieve efficient task execution.Under the limited computation and communication resources,a system-wide utility maximization problem by jointly considering heterogeneous processor scheduling,computation and bandwidth resource allocation was formulated as a mixed-integer nonlinear programming problem.To solve the problem efficiently,the formulated problem was transformed into two sub-problems,namely application-driven heterogeneous processor scheduling and joint resource allocation,and a Lagrange-dual based algorithm was proposed.Simulation results show that the proposed scheme can effectively improve the system-wide utility of the BMEC system.…”
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  12. 4852

    Research on Dynamic and Complexity of Energy-Saving Investment about Multichannel and Multienergy Supply Chain by Fang Wu

    Published 2020-01-01
    “…It is interesting to find the Grazing–Hopf bifurcation which usually occurs in nonlinear circuits. The mixed expectation of bounded rationality and the naive expectation is conducive to suppressing the bifurcation and chaos of the market. …”
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  13. 4853

    Study on Temperature Field of Elastic Element of Large Rubber Coupling of Ship by Wang Zhonghou, Wan Pinlei, Zhao Bo

    Published 2015-01-01
    “…For the problem that the finite element simulation analysis of temperature field of large rubber coupling of ships is difficult to convergence because of the large load,the large deformation of rubber piece parts and the nonlinear characteristics of rubber materials,by using the decoupling method,combined with the node equivalence method,the finite element mathematical mode of the rubber material thermal analysis is established theoretically. …”
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  14. 4854

    On Costas Sets and Costas Clouds by Konstantinos Drakakis

    Published 2009-01-01
    “…We abstract the definition of the Costas property in the context of a group and study specifically dense Costas sets (named Costas clouds) in groups with the topological property that they are dense in themselves: as a result, we prove the existence of nowhere continuous dense bijections that satisfy the Costas property on ℚ2, ℝ2, and ℂ2, the latter two being based on nonlinear solutions of Cauchy's functional equation, as well as on ℚ, ℝ, and ℂ, which are, in effect, generalized Golomb rulers. …”
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  15. 4855

    Numerical Solution of Higher Order Boundary Value Problems by Shahid S. Siddiqi, Muzammal Iftikhar

    Published 2013-01-01
    “…The aim of this paper is to use the homotopy analysis method (HAM), an approximating technique for solving linear and nonlinear higher order boundary value problems. Using HAM, approximate solutions of seventh-, eighth-, and tenth-order boundary value problems are developed. …”
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  16. 4856

    仿生虎鲸瞬时负载数值模拟 by 李明昊, 乔捷, 王宝新, 范佳艺, 高存强

    Published 2021-01-01
    “…As a kind of bionic robot fish,bionic killer whale played an important role in ocean development and scientific investigation.Based on the theory of flapping wing movement,the biomimetic killer whale was designed in the way of fish propulsion,the load was nonlinear,time-varying and strongly coupled.The bionic killer whale‘s force model was established through the analysis of the bionic killer whale’s straight line and turning movement.The instantaneous load’s text file of bionic killer whale was generated by MATLAB,the instantaneous load was successfully introduced into the rigid-flexible coupling model by ADAMS spline function,which provided a method and condition for qualitative and quantitative analysis of bionic killer whale’rigid-flexible coupling reliability analysis.The results show that MATLAB can accurately simulate the periodic change of the bionic killer whale’s instantaneous load,providing a clear quantitative data for the bionic killer whale’s reliability research.…”
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  17. 4857

    A Few Remarks on the Poetics of Turbulence in Richard Powers’ Operation Wandering Soul by Jean-Yves Pellegrin

    Published 2010-02-01
    “…In order to counter their harmful effects, the novel thus sets about disturbing narrative order and our reading habits by turning itself into a turbulent text, modeling its innermost structures on that of nonlinear systems.…”
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  18. 4858

    Design of Optical Wireless Networks with Fair Traffic Flows by Artur Tomaszewski

    Published 2014-01-01
    “…Finally, as the general problem is nonlinear, it is shown that the problem can be transformed to a linear MIP problem and solved effectively when single-path routing of traffic flows is assumed.…”
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  19. 4859

    Planetary Gearbox Fault Diagnosis based on LMD Sample Entropy and ELM by Zhang Ning, Wei Xiuye, Xu Jinhong

    Published 2020-04-01
    “…In order to solve the difficult problem of early fault feature extraction of planetary gearbox and consider that the planetary gearbox vibration signal is coupling and nonlinear,and the signal has multiple transmission paths,a planetary gearbox fault diagnosis method based on Local Mean Decomposition(LMD) and Sample Entropy and Extreme Learning Machine(ELM) is proposed.Firstly,the vibration signal is adaptively decomposed into a plurality of PF components by LMD,and the first four PF components including the main fault information are selected in combination with the correlation coefficient and the variance contribution rate.Secondly,the Sample Entropy of the signal is calculated to form a feature vector.Finally,the feature vector is input into ELM for fault classification.Experiments are carried out on the planetary gearbox test bench,compared with the probabilistic neural network classification algorithm,and compared with the feature vector based on Singular Value Decomposition (SVD).The results verify the effectiveness of the proposed method.…”
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  20. 4860

    Gust Load Alleviation with Robust Control for a Flexible Wing by Xiang Liu, Qin Sun

    Published 2016-01-01
    “…To accurately describe the aeroelastic model over a large flight envelope, a nonlinear parameter-varying model is developed which is a function of both Mach number and dynamic pressure. …”
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