Results 71 to 80 of about 8,538 (212)

Generation of synthetic CT from MRI for MRI‐based attenuation correction of brain PET images using radiomics and machine learning

Medical Physics, Volume 52, Issue 6, Page 3772-3784, June 2025.
Abstract Background Accurate quantitative PET imaging in neurological studies requires proper attenuation correction. MRI‐guided attenuation correction in PET/MRI remains challenging owing to the lack of direct relationship between MRI intensities and linear attenuation coefficients.
Amin Hoseinipourasl, Gholam‐Ali Hossein‐Zadeh, Peyman Sheikhzadeh, Hossein Arabalibeik, Shaghayegh Karimi Alavijeh, Habib Zaidi, Mohammad Reza Ay   +6 more
wiley   +1 more source

Estratégia adaptativa para máquinas assíncronas com orientação indireta pelo campo

Eletrônica de Potência, 1997
Este trabalho estuda a estratégia adaptativa do tipo MRAC (Model Referente Adaptive Control) aplicada no controle da máquina assíncrona com orientação indireta pelo campo rotórico (IFO).
Luis A. de S. Ribeiro, Cursino B. Jacobina, Antonio M. N. Lima, Alexandre C. Oliveira   +3 more
doaj   +1 more source

Model Reference‐Based Neural Controller for Transmission Line Inspection Robot

Journal of Field Robotics, Volume 42, Issue 4, Page 1314-1332, June 2025.
ABSTRACT The regular inspection of the power transmission lines is essential for the uninterrupted transmission of electrical energy to demand points. This quickly requires actions with economically, efficiently, and safely. Therefore, the transmission line inspection robots are inevitable solution as an alternative to existing line inspection methods.
Zehra Karagöz, Nazmi Ekren, Uğur Demir, Ahmet Fevzi Baba, Mustafa Şahin   +4 more
wiley   +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

Characterizing atrial fibrillation in patients with and without heart failure across the ejection fraction spectrum: Incidence, prevalence, and treatment strategies

European Journal of Heart Failure, Volume 27, Issue 2, Page 236-248, February 2025.
Atrial fibrillation (AF) in patients with versus without heart failure (HF) across the ejection fraction spectrum. HFmrEF, heart failure with mildly reduced ejection fraction; HFpEF, heart failure with preserved ejection fraction; HFrEF, heart failure with reduced ejection fraction; SwedeHF, Swedish Heart Failure Registry.
Valeria Valente, Giulia Ferrannini, Lina Benson, Paolo Gatti, Federica Guidetti, Michael Melin, Frieder Braunschweig, Cecilia Linde, Ulf Dahlström, Lars H. Lund, Marat Fudim, Gianluigi Savarese   +11 more
wiley   +1 more source

On the Afrotropical genus Holmelgonia (Araneae, Linyphiidae), with the description of three new species from the Albertine Rift

European Journal of Taxonomy, 2014
Three new species of Holmelgonia were found in the mountain forest of Kibira National Park in Burundi: H. afromontana sp. nov. (♂♀), H. bosnasutus sp. nov. (♂♀) and H. disconveniens sp. nov. (♂). A key to the males in the genus, now containing 17 species,
Benoît Nzigidahera, Rudy Jocqué
doaj   +1 more source

Model reference adaptive hierarchical control framework for shake table tests

Earthquake Engineering &Structural Dynamics, Volume 54, Issue 1, Page 346-362, January 2025.
Abstract The structural response under earthquake excitation can be simulated by shake table tests. However, the performance of the shake table is affected by the Control‐Structure Interaction (CSI) effect. In recent years, nonlinear control algorithms were developed to compensate for the CSI effect.
Zhongwei Chen, T. Y. Yang, Yifei Xiao, Xiao Pan, Wanyan Yang   +4 more
wiley   +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

Partial Hasse invariants on splitting models of Hilbert modular varieties [PDF]

, 2016
Let $F$ be a totally real field of degree $g$, and let $p$ be a prime number. We construct $g$ partial Hasse invariants on the characteristic $p$ fiber of the Pappas-Rapoport splitting model of the Hilbert modular variety for $F$ with level prime to $p$,
Reduzzi, Davide A., Xiao, Liang
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