Results 71 to 80 of about 8,467 (198)

Quantitative and clinical impact of MRI-based attenuation correction methods in [18F]FDG evaluation of dementia

EJNMMI Research, 2019
Background Positron emission tomography/magnetic resonance imaging (PET/MRI) is a promising diagnostic imaging tool for the diagnosis of dementia, as PET can add complementary information to the routine imaging examination with MRI.
Silje Kjærnes Øen, Thomas Morten Keil, Erik Magnus Berntsen, Joel Fredrik Aanerud, Thomas Schwarzlmüller, Claes Nøhr Ladefoged, Anna Maria Karlberg, Live Eikenes   +7 more
doaj   +1 more source

Multiple input control strategies for robust and adaptive climate engineering in a low order 3-box model [PDF]

, 2018
A low-order 3-box energy balance model for the climate system is employed with a multivariable control scheme for the evaluation of new robust and adaptive climate engineering strategies using solar radiation management.
Bonetti, F., McInnes, C.
core   +1 more source

Disain dan Implementasi Kontrol PID Model Reference Adaptive Control untuk Automatic Safe Landing pada Pesawat UAV Quadcopter

Jurnal Teknik ITS, 2012
Pada fase penerbangan quadcopter, fase landing (pendaratan) merupakan fase paling kritis, dimana resiko terjadi kecelakaan paling besar. Permasalahan tersebut muncul karena adanya beberapa kendala, seperti kendala pada struktur rangka pesawat yang kecil,
Teddy Sudewo, Eka Iskandar, Katjuk Astrowulan   +2 more
doaj  

An Integral and MRAC–Based Approach to the Adaptive Stabilisation of a Class of Linear Time–Delay Systems with Unknown Parameters

International Journal of Applied Mathematics and Computer Science
The design of a novel strategy based on the model reference adaptive control method for the stabilisation of a second-order linear time-delay system with unknown parameters is presented.
Ramírez Jerónimo Luis Felipe, Saldivar Belem, Aguilar-Ibañez Carlos, Acosta José Ángel   +3 more
doaj   +1 more source

Control Optimization of Steam Boilers via Reinforcement Learning

IEEE Access
Steam boilers present complex control challenges due to their nonlinear dynamics and fluctuating load conditions. This study proposes a novel hybrid adaptive control framework that significantly enhances system performance by synergizing off-policy deep ...
Emmanuel Okafor, Maad Alowaifeer
doaj   +1 more source

Adaptive output-feedback following control for time-delay systems

Archives of Control Sciences, 2014
Adaptive control of the time-delay systems is presented in the paper. Despite the use of MRAC based design, only the model following (not perfect model following) is considered.
Tárník Marián, Murgaš Ján, Miklovičová Eva   +2 more
doaj   +1 more source

Experimental Results of Concurrent Learning Adaptive Controllers [PDF]

, 2012
Commonly used Proportional-Integral-Derivative based UAV flight controllers are often seen to provide adequate trajectory-tracking performance only after extensive tuning.
Borkar V., Chowdhary G., Chowdhary G., Cutler M., Gelb A., How J. P., Ioannou P. A., Kim Y.H., Kingravi H. A., Ljung L.   +9 more
core   +2 more sources

Model‐Free Predictive Direct Control of Unified Power Quality Conditioner Based on Ultra‐Local Model

IET Energy Systems Integration, Volume 7, Issue 1, January/December 2025.
ABSTRACT To enhance the robustness of the unified power quality conditioner (UPQC) with finite control set model predictive control (FCS‐MPC), direct control in the dq coordinate system faces challenges such as complex coordinate transformation, system coupling issue and phase‐locked‐loop delays.
Guifeng Wang, Jinling Ji, Xinxin Zhu, En Fang, Qigang Du, Chao Luo, Zhifang Lin   +6 more
wiley   +1 more source

Fast Power Control Strategy for Grid‐Forming Inverter Based on Model Reference Adaptation

IET Power Electronics, Volume 18, Issue 1, January/December 2025.
This paper proposes a fast power control strategy for grid‐forming inverters: firstly, the active power control bandwidth is improved by a prefilter with leading characteristics; then, model reference is used to adaptively adjust the parameters of the prefilter to avoid the impact of grid impedance changes on bandwidth enhancement performance. With the
Xinxin Fu, Xing Zhang, Feng Han, Mengze Wu, Zixuan Guo   +4 more
wiley   +1 more source

Active Sampling-based Binary Verification of Dynamical Systems

, 2018
Nonlinear, adaptive, or otherwise complex control techniques are increasingly relied upon to ensure the safety of systems operating in uncertain environments. However, the nonlinearity of the resulting closed-loop system complicates verification that the
Ali A., Anguita D., Bishop C. M., Brinker K., Hoxha B., Montgomery D. C., Platt J., Quindlen J. F., Scholkopf B., Settles B., Tipping M. E., Vapnik V. N.   +11 more
core   +1 more source