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Wyszukujesz frazę "SMO" wg kryterium: Temat


Wyświetlanie 1-6 z 6
Tytuł:
High-level and Low-level Feature Set for Image Caption Generation with Optimized Convolutional Neural Network
Autorzy:
Padate, Roshni
Jain, Amit
Kalla, Mukesh
Sharma, Arvind
Powiązania:
https://bibliotekanauki.pl/articles/2174448.pdf
Data publikacji:
2022
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
CNN
image caption
proposed contrast
sharpness
SMO-SCME algorithm
Opis:
Automatic creation of image descriptions, i.e. captioning of images, is an important topic in artificial intelligence (AI) that bridges the gap between computer vision (CV) and natural language processing (NLP). Currently, neural networks are becoming increasingly popular in captioning images and researchers are looking for more efficient models for CV and sequence-sequence systems. This study focuses on a new image caption generation model that is divided into two stages. Initially, low-level features, such as contrast, sharpness, color and their high-level counterparts, such as motion and facial impact score, are extracted. Then, an optimized convolutional neural network (CNN) is harnessed to generate the captions from images. To enhance the accuracy of the process, the weights of CNN are optimally tuned via spider monkey optimization with sine chaotic map evaluation (SMO-SCME). The development of the proposed method is evaluated with a diversity of metrics.
Źródło:
Journal of Telecommunications and Information Technology; 2022, 4; 67--74
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Skalowanie obserwacji w wielowymiarowej diagnostyce maszyn niestacjonarnych
Multidimensional vibration condition monitoring of nonstationary systems in operation by symptom rescaling
Autorzy:
Cempel, C.
Tabaszewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/328071.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
diagnostyka wielouszkodzeniowa
symptomowa macierz obserwacji
SMO
rozkład wartości szczególnych
SVD
reskalowanie SMO
symptom observation matrix
multi fault observation
singular value decomposition
symptom rescaling
Opis:
Wiele obiektów krytycznych pracuje niestacjonarnie, a większość symptomów stanu technicznego zależy co najmniej od chwilowego obciążenia i warunków pracy. Zatem diagnostyka takich obiektów powinna mieć możliwość reskalowania odczytów symptomów do obciążenia znamionowego. Praca pokazuje taką możliwość dla przypadku wielowymiarowej symptomowej macierzy obserwacji, uzupełniając w ten sposób możliwości diagnozowania wielowymiarowego na przypadek niestacjonarnej pracy obiektów krytycznych.
Many critical mechanical systems operate in a nonstationary regime (load), and many observed symptoms of its condition depend in a some way on a system load and/or environmental conditions. Hence the condition monitoring of a such systems ought to have some possibility of rescaling of observed symptoms to a standard load condition. This paper shows such a possibility of a symptoms rescaling in application to multidimensional vibration condition monitoring. It is shown on some real example of vibration condition monitoring, that rescaling of symptoms can make more reliable the assessment of current system condition, as well as its prognosis.
Źródło:
Diagnostyka; 2005, 34; 23-30
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A fault monitoring method for wind power generation system based on sliding mode observer
Autorzy:
Yu, Wenxin
Huang, Shao Dao
Jiang, Dan
Powiązania:
https://bibliotekanauki.pl/articles/141570.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
double-fed induction generator (DFIG)
sliding model observer (SMO)
stator voltage-oriented
Opis:
In this paper, a rotor current fault monitoring method is proposed based on a sliding mode observer. Firstly, the state-space model of the Double-Fed Induction Generator (DFIG) is constructed by vector transformation. Meanwhile, the stator voltage orientation vector control method is applied to decouple a stator and rotor currents, so as to obtain the correlation between the stator and rotor current. Furthermore, the mathematical model of stator voltage orientation is obtained. Then a state sliding mode observer (SMO) is established for the output current of the rotor of the DFIG. The stability and reachability of the system in a limited time is proved. Finally, the system state is determined by the residuals of the measured and estimated rotor currents. The simulation results show that the method proposed in this paper can effectively monitor the status: a normal state, voltage drop faults, short-circuit faults between windings, and rotor current sensor faults which have the advantages of fast response, high stability.
Źródło:
Archives of Electrical Engineering; 2020, 69, 3; 625-643
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A study of dynamic hysteresis model for a magnetorheological damper
Autorzy:
Chen, Kun-Yung
Kung, Ming-Lung
Powiązania:
https://bibliotekanauki.pl/articles/2200888.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
identification
LuGre model
magnetorheological damper
self-learning particle
swarm optimization
SLPSO
sliding mode observer
SMO
Opis:
The paper proposes a new dynamic model based on the LuGre model and an electrical equation to describe the hysteresis phenomenon for a magnetorheological (MR) damper. In addition, a sliding mode observer (SMO) is proposed to estimate unmeasurable states of the MR damper. The parameters of the MR damper are successfully identified by using the self-learning particle swarm optimization (SLPSO) algorithm. The contributions of this paper are: i) a new dynamic model based on the LuGre model and an electrical equation for an MR damper is successfully formulated to fit for the hysteresis behavior, ii) the exerted damping force can be practically adjusted by using input voltage for the dynamic model, iii) the SMO is proposed to estimate the internal states and current, and iv) the unknown parameters of the MR damper are successfully identified by using the SLPSO algorithm with a numerical experiment.
Źródło:
Journal of Theoretical and Applied Mechanics; 2023, 61, 2; 259--274
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spider monkey optimization (SMO) - lattice Levenberg-Marquardt recursive least squares based grid synchronization control scheme for a three-phase PV system
Autorzy:
Dash, Dipak Kumar
Sadhu, Pradip Kumar
Subudhi, Bidyadhar
Powiązania:
https://bibliotekanauki.pl/articles/1845508.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
solar PV array
VSC
SMO
DC-DC converter
lattice Levenberg–Marquardt recursive least squares
hysteresis current controller
Opis:
This paper presents a new grid integration control scheme that employs spider monkey optimization technique for maximum power point tracking and Lattice Levenberg Marquardt Recursive estimation with a hysteresis current controller for controlling voltage source inverter. This control scheme is applied to a PV system integrated to a three phase grid to achieve effective grid synchronization. To verify the efficacy of the proposed control scheme, simulations were performed. From the simulation results it is observed that the proposed controller provides excellent control performance such as reducing THD of the grid current to 1.75%.
Źródło:
Archives of Control Sciences; 2021, 31, 3; 707-730
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spider monkey optimization (SMO) - lattice Levenberg-Marquardt recursive least squares based grid synchronization control scheme for a three-phase PV system
Autorzy:
Dash, Dipak Kumar
Sadhu, Pradip Kumar
Subudhi, Bidyadhar
Powiązania:
https://bibliotekanauki.pl/articles/1845534.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
solar PV array
VSC
SMO
DC-DC converter
lattice Levenberg–Marquardt recursive least squares
hysteresis current controller
Opis:
This paper presents a new grid integration control scheme that employs spider monkey optimization technique for maximum power point tracking and Lattice Levenberg Marquardt Recursive estimation with a hysteresis current controller for controlling voltage source inverter. This control scheme is applied to a PV system integrated to a three phase grid to achieve effective grid synchronization. To verify the efficacy of the proposed control scheme, simulations were performed. From the simulation results it is observed that the proposed controller provides excellent control performance such as reducing THD of the grid current to 1.75%.
Źródło:
Archives of Control Sciences; 2021, 31, 3; 707-730
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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