Results 51 to 60 of about 329,967 (359)

A Thermodynamic 3D Model for the Simulation of Diffusion‐Controlled Alloying Processes in Heterogeneous Material Structures

Advanced Engineering Materials, EarlyView.
A numerical model resulting from irreversible thermodynamics for describing transport processes is introduced, focusing on thermodynamic activity gradients as the actual driving force for diffusion. Implemented in CUDA C++ and using CalPhaD methods for determining the necessary activity data, the model accurately simulates interdiffusion in aluminum ...
Ulrich Holländer, Leonhard Holländer, André Langohr, Hans Jürgen Maier   +3 more
wiley   +1 more source

Surface Tension Measurement of Ti‐6Al‐4V by Falling Droplet Method in Oxygen‐Free Atmosphere

Advanced Engineering Materials, EarlyView.
In this article, the temperature‐dependent surface tension of free falling, oscillating Ti‐6Al‐4V droplets is investigated in both argon and monosilane doped, oxygen‐free atmosphere. Droplet temperature and oscillation are captured with one single high‐speed camera, and the surface tension is calculated with Rayleigh's formula.
Johannes May, Finn‐Lennard Janthur, Lena Kreie, Michael Müller, Sarah Seffer, Nick Schwarz, Jörg Hermsdorf, Thomas Hassel, Stefan Kaierle, Ludger Overmeyer   +9 more
wiley   +1 more source

Backward Stochastic Linear Quadratic Optimal Control with Expectational Equality Constraint

Mathematics
This paper investigates a backward stochastic linear quadratic control problem with an expected-type equality constraint on the initial state. By using the Lagrange multiplier method, the problem with a uniformly convex cost functional is first ...
Yanrong Lu, Jize Li, Yonghui Zhou
doaj   +1 more source

Optimal control of partially observable linear quadratic systems with asymmetric observation errors [PDF]

, 2001
This paper deals with the optimal quadratic control problem for non-Gaussian discrete-time stochastic systems. Our main result gives explicit solutions for the optimal quadratic control problem for partially observable dynamic linear systems with ...
Romera, Rosario
core   +1 more source

Linear Quadratic Stochastic Optimal Control Problems with Operator Coefficients: Open-Loop Solutions

, 2019
An optimal control problem is considered for linear stochastic differential equations with quadratic cost functional. The coefficients of the state equation and the weights in the cost functional are bounded operators on the spaces of square integrable ...
Wei, Qingmeng, Yong, Jiongmin, Yu, Zhiyong   +2 more
core   +1 more source

Imaging of Biphoton States: Fundamentals and Applications

Advanced Functional Materials, EarlyView.
Quantum states of two photons exhibit a rich polarization and spatial structure, which provides a fundamental resource of strongly correlated and entangled states. This review analyzes the physics of these intriguing properties and explores the various techniques and technologies available to measure them, including the state of the art of their ...
Alessio D'Errico, Ebrahim Karimi
wiley   +1 more source

A New Method for Determining the Degree of Controllability of State Variables for the LQR Problem Using the Duality Theorem

Applied Sciences, 2020
The control performance of a dynamic system can be checked by the degree of controllability. In this work, we present a new method for determining the degree of observability of state variables for the linear quadratic optimal estimation (LQE) problem ...
Lifei Zhang, Konstantin Avenirovich Neusypin, Maria Sergeevna Selezneva   +2 more
doaj   +1 more source

Formation of optimal control of nonlinear dynamic object based on Takagi-Sugeno model [PDF]

Компьютерные исследования и моделирование, 2015
The algorithm of fuzzy control system essentially nonlinear dynamic object is considered in this article. For solving nonlinear optimal control problem is proposed to use the method of linear quadratic regulation (LQR) with fuzzy Takagi-Sugeno model. The
Sergey Nikolayevich Chukanov, Elena Leonidovna Pershina   +1 more
doaj   +1 more source

Optimal tracking control in photovoltaic using linear quadratic tracking

Journal of Aceh Physics Society, 2022
Abstrak. Penelitian ini membahas tentang masalah penjejak pasif photovoltaic terhadap posisi matahari secara optimal. Penjejak pasif digunakan ketika penjejak aktif tidak berfungsi.
Mohd Iqbal Muttaqin, Said Munzir, Marwan Ramli, Muhammad Ikhwan   +3 more
doaj   +1 more source

A Novel Method for Optimal Control of Piecewise Affine Systems Using Semi-Definite Programming [PDF]

International Journal of Industrial Electronics, Control and Optimization, 2020
: In this paper, a novel optimal control design method by discontinuous quadratic Lyapunov function and continuous quadratic Lyapunov function for 2-dimensional piecewise affine systems via semi-definite programming and LMI constraints is proposed.In ...
Majid Akbarian, Najmeh Eghbal, Naser Pariz   +2 more
doaj   +1 more source