Non-linear components

Part 1 of ebook "Finite element analysis and design of steel and steel-concrete composite bridges" provides readers with contents including: Chapter 1 - Introduction; Chapter 2 - Nonlinear material behavior of the bridge components; Chapter 3 - Applied loads and stability of steel and steel-concrete composite bridges;...

227p giangdongdinh 28-05-2024 3 2   Download

The purpose of the field-oriented control (FOC) is therefore to create a tool that allows the decoupling control of the flux and torque-producing current components from the three-phase AC currents flowing in the coil. The FOC drive system is a system based on the principle of decoupling the above power components thanks to the stator current feedback control (the innermost circuit of the drive system). The FOC-type control method belongs to the class of vector control methods for electrical machines.

22p dianmotminh02 03-05-2024 2 1   Download

The main aim of this paper is to investigate the nonlinear buckling and postbuckling of eccentrically stiffened sandwich functionally graded porous (FGP) cylindrical shells surrounded by elastic foundations in thermal environments and under torsional load by analytical approach in terms of the displacement components.

13p dianmotminh02 03-05-2024 4 1   Download

Ebook "Modelling water flow in unsaturated porous media: Accounting for nonlinear permeability and material heterogeneity" focuses on two issues related to mathematical and numerical modelling of flow in unsaturated porous media. In the first part numerical solution of the governing equations is discussed, with particular emphasis on the spatial discretization of highly nonlinear permeability coefficient. The second part deals with large scale flow in heterogeneous porous media of binary structure.

254p loivantrinh 29-10-2023 6 3   Download

Continued part 1, part 2 of ebook "Engine modeling and control: Modeling and electronic management of internal combustion engines" provides readers with contents including: engine control; engine control structure and components; engine-control methods and calibration; control of gasoline engines; control of diesel engines;...

359p dangsovu 20-10-2023 9 4   Download

Modeling for structural analysis: behavior and basics explains purpose and limitations of structural analysis as tool for designing buildings, other structures. Describes linear and nonlinear behavior of structures and structural components, and how to model this for analysis. Uses physical explanations rather than formal theory or mathematics. Reference for students, educators, practicing engineers at all levels.

145p runordie6 06-08-2022 6 1   Download

A case study is presented when the car is parked at a landing level where the fundamental natural frequencies of the car, suspension and compensating rope system coincide with one of the natural frequencies of the high-rise building. The results show a range of nonlinear dynamic interactions between the components of the elevator system that play a significant role in the operation of the entire installation.

22p guernsey 28-12-2021 12 0   Download

In this paper, a low-complexity linear group precoding algorithm in the exponential correlation channel model is proposed for massive MIMO systems. The proposed precoder consists of two components: The first one minimizes the interferences among neighboring user groups; The second one improves the system performance by utilizing the ELR-SLB technique.

16p cothumenhmong11 05-05-2021 17 1   Download

Memristor is a non-linear circuit element in which voltage-current relationship is determined by the previous values of the voltage and current, generally the history of the circuit. The nonlinearity in this component can be considered as a fractional-order form, which yields a fractional memristor (fracmemristor). In this paper, a fractional-order memristor in a chaotic oscillator is applied, while the other electronic elements are of integer order. The fractional-order range is determined in a way that the circuit has chaotic solutions.

9p dayhoctainha 10-09-2020 8 0   Download

Environmental scientists are currently assessing the ability of hyper-spectral remote sensing to detect, identify, and analyze natural components, including minerals, rocks, vegetation and soil. This paper discusses the use of a nonlinear reflectance model to distinguish multicomponent particulate mixtures.

15p vijiraiya2711 27-05-2020 19 1   Download

Multiple-input multiple-output (MIMO) millimeter wave (mmWave) systems are vulnerable to hardware impairments due to operating at high frequencies and employing a large number of radiofrequency (RF) hardware components. In particular, nonlinear power amplifiers (PAs) employed at the transmitter distort the signal when operated close to saturation due to energy efficiency considerations. In this paper, we study the performance of a MIMO mmWave hybrid beamforming scheme in the presence of nonlinear PAs.

33p son248 24-03-2020 33 2   Download

The fitting curves demonstrate that the Hybrid model produces closer trend so better describing the actual data. Via our study with Vietnam Index, it is confirmed that the characteristics of ARIMA model are more suitable for linear time series while ANN model is good to work with nonlinear time series. The Hybrid model takes into account both of these features, so it could be employed in case of more generalized time series. As the financial market is increasingly complex, the time series corresponding to stock indexes naturally consist of linear and non-linear components.

6p elandorr 03-12-2019 39 0   Download

Education is among the basic human needs and one of the components of well being in the modern world. Equal distribution of education is of great interest in public policy analysis. Spending in education represents substantial share of government revenue. The inequality in educational distribution represents large welfare loss. The purposes of this article are three folds. First, it calculates average years of schooling. Second, it estimates educational inequality in terms of standard deviation of schooling.

8p angicungduoc1 02-12-2019 33 0   Download

This paper presents a new methodology for the modeling and control of power systems based on an uncertain polytopic linear parameter-varying (LPV) approach using parameter set mapping with principle component analysis (PCA). An LPV representation of the power system dynamics is generated by linearization of its differential-algebraic equations about the transient operating points for some given specific faults containing the system nonlinear properties. The time response of the output signal in the transient state plays the role of the scheduling signal that is used to construct the LPV model.

10p kequaidan1 16-11-2019 60 2   Download

Provision of redundant components in parallel is an efficient way to increase the system reliability, however, the weight, volume and cost of the system will increase simultaneously. This paper proposes a new two-phase linear programming approach for solving the nonlinear redundancy allocation problems subject to multiple linear constraints.

10p vinguyentuongdanh 20-12-2018 21 0   Download

Chapter 18 provides knowledge of time series. When you finish this chapter, you should be able to: Define the four components of a time series, determine a linear trend equation, compute a moving average, compute the trend equation for a nonlinear trend,...

33p tangtuy09 21-04-2016 63 4   Download

We introduce a new method for disambiguating word senses that exploits a nonlinear Kernel Principal Component Analysis (KPCA) technique to achieve accuracy superior to the best published individual models. We present empirical results demonstrating significantly better accuracy compared to the state-of-the-art achieved by either na¨ve Bayes ı or maximum entropy models, on Senseval-2 data. We also contrast against another type of kernel method, the support vector machine (SVM) model, and show that our KPCA-based model outperforms the SVM-based model. ...

8p bunbo_1 17-04-2013 51 1   Download

Many chaotic circuit models have been developed and studied up to date. Autonomous and nonautonomous Chua’s circuits hold a special importance in the studies of chaotic system modeling and chaos-based science and engineering applications. Since a considerable number of hardware and software-based design and implementation approaches can be applied to Chua’s circuits, these circuits also constitute excellent educative models that have pedagogical value in the study of nonlinear dynamics and chaos.

217p nguyenthai_thinh 16-03-2013 72 14   Download

The growing interest in the application of artificial intelligence (AI) techniques to power system engineering has introduced the potentials of using this state-of-the-art technology. AI techniques, unlike strict mathematical methods, have the apparent ability to adapt to nonlinearities and discontinuities commonly found in power systems. The best-known algorithms in this class include evolution programming, genetic algorithms, simulated annealing, tabu search, and neural networks. In the last three decades many papers on these applications have been published.

0p nguyenthai_thinh 16-03-2013 69 17   Download

At this level we need a model with two components and one constraint. The constraint is the ability to take into account the nonlinearities in the ináation and the term structure dynamics, a usual empirical fact in past studies and a possible outcome of the creation of the ECB. The Örst component is intended to identify the long-term perception of monetary policy by private agents.

45p taisaovanchuavo 23-01-2013 63 6   Download