Gotowe bibliografie tematyczne / MATLAB R2008b

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Gotowa bibliografia na temat „MATLAB R2008b”

Autor: Grafiati

Data publikacji: 11 września 2023

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Artykuły w czasopismach na temat "MATLAB R2008b"

Sandy Bhawana Mulia. "KOMPARASI MODEL PREDIKSI BEBAN PUNCAK HARIAN LISTRIKANTARA ALGORITMA BACKPROPAGATION DENGAN ALGORITMA KOHONEN MAP". TEMATIK 2, nr 2 (30.12.2015): 114–23. http://dx.doi.org/10.38204/tematik.v2i2.77.

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Abstrak : Teknologi Soft Computing telah membantu banyak peneliti dalam mengembangkan sebuah penelitiannya. Contohnya adalah pengembangan model prediksi beban listrik harian non linier berbasis kecerdasan buatan yang menggunakan algoritma Backporpagation dan algoritma Kohonen Map. Kode computer yang dikembangkan menggunakan software Matlab R2008b dari Mathwork Corp. Dapat dilihat dari hasil perhitungan bahwa keakuratan model Backpropagation 99,83 % sedangkan model Kohonen Map hanya 97,53 %. Dengan demikian dapat disimpulkan bahwa model prediksi menggunakan algoritma Backpropagation lebih baik tingkat akurasinya dibandingkan dengan model prediksi menggunakan metoda Kohonen Map.

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Kaloko, Bambang Sri, Soebagio Soebagio i Mauridhi H. Purnomo. "MAPPING OF ELECTROCHEMISTRY AND NEURAL NETWORK MODEL APPLIED IN STATE OF CHARGE ESTIMATION FOR LEAD ACID BATTERY USED IN ELECTRIC VEHICLE". Indonesian Journal of Chemistry 11, nr 2 (3.11.2011): 140–47. http://dx.doi.org/10.22146/ijc.21401.

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Analytical models have been developed to diminish test procedures for product realization, but they have only been partially successful in predicting the performance of battery systems consistently. The complex set of interacting physical and chemical processes within battery systems has made the development of analytical models of significant challenge. Advanced simulation tools are needed to be more accurately model battery systems which will reduce the time and cost required for product realization. As an alternative approach begun, the development of cell performance modeling using non-phenomenological models for battery systems were based on artificial neural networks (ANN) using Matlab 7.6.0(R2008b). ANN has been shown to provide a very robust and computationally efficient simulation tool for predicting state of charge for Lead Acid cells under a variety of operating conditions. In this study, the analytical model and the neural network model of lead acid battery for electric vehicle were used to determinate the battery state of charge. A precision comparison between the analytical model and the neural network model has been evaluated. The precise of the neural network model has error less than 0.00045 percent.

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Primasatya, Dimas, Erry Rimawan, Hendi Herlambang i Horas Canman S. "Simulation of the Cardiovascular Mechanical System Based on Pressure-Flow Model Rest Condition". International Journal of Innovative Science and Research Technology 5, nr 7 (19.07.2020): 104–15. http://dx.doi.org/10.38124/ijisrt20jul031.

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Non-invasive measurement method has made rapid developments in the field of biomedical engineering. One of research is impedance cardiography (ICG), which provide information of pulsation basic. By knowing this kind of measurement technique, it will assist inspection of the patient's physiological condition with cardiovascular system. This research is aimed to determine the mechanical characteristics of the cardiovascular system in the human body such as a wave graph of pressure, flow, and volume, based on pressure–flow model in rest condition, and analyze the simulation results by implementing state of the physiology cardiovascular disease. To obtain the wave chart that is modeled by the cardiovascular system using a lumped parameter method, formulate the differential equations of the pressure–flow dynamics equation for an incompressible fluid in a segment of a cylindrical elastic tube and simulate the model using the Simulink toolboxes from Matlab R2008b. The simulation with lumped parameter method resulted wave graphics of pressure, flow, and volume of physiological state a person in rest condition, the left ventricular pressure is 120 mmHg , right ventricular pressure is 30 mmHg , left ventricular outflow is 800 mL / sec and volume in the left ventricle is 160 mL . By implementing the simulation have been developed on the physiological state of cardiovascular disease, hypertension occurs when the arteries resistance R3i = 0.61 mmHg × s mL with the pressure of the left ventricle is 145 mmHg. For coronary heart condition, ventricular pressure decreased until 82 mmHg in the value of the coronary arteries resistance is R3o = 0.852 mmHg × s mL. This research assumed heart haves the character of passive because there is no feedback signal that can compensate if the pressure in the systemic circulation is reduced. The research can be concluded that the graph from simulation shows the results are not much different from the reference chart, this results indicates that the equation and the simulation was able to reflect on the human circulatory physiological circumstances. A little different of a graphic simulation result due to differences in the parameters and assumptions used.

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Patel, Bindesh D., Payal B. Rathi i Nirav N. Viradiya. "INTER-RATER AND INTRA-RATER RELIABILIY OF POSTURAL ANALYSIS SOFTWARE (MATLAB 7.11 R2010B)". International Journal of Physiotherapy and Research 8, nr 3 (11.06.2020): 3452–56. http://dx.doi.org/10.16965/ijpr.2020.124.

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Krichevsky, Mikhail, Artyr Bydagov i Julia Martynova. "Assessment of the efficiency of educational project management using neuro-fuzzy system". E3S Web of Conferences 110 (2019): 02070. http://dx.doi.org/10.1051/e3sconf/201911002070.

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The project represents the introduction of elements and methods of artificial intelligence in the work programs of disciplines in the direction of “Management”. To assess the efficiency of such project management, it was proposed to use tools related to machine learning methods that include neural networks and fuzzy logic. The results of such an assessment are obtained using a neuro-fuzzy anfis (adaptive neuro-fuzzy inference system) type system, which is implemented using the MATLAB R2018b software package.

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Journal, Baghdad Science. "A theoretical Design of a cover for lowering the solar cells temperature and enhance their performance". Baghdad Science Journal 12, nr 3 (6.09.2015): 474–78. http://dx.doi.org/10.21123/bsj.12.3.474-478.

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In this research, main types of optical coatings are presented which are used as covers for solar cells, these coatings are reflect the infrared (heat) from the solar cell to increase the efficiency of the cell (because the cell’s efficiency is inversely proportional to the heat), then the theoretical and mathematical description of these optical coatings are presented, and an optical design is designed to meet this objective, its optical transmittance was calculated using (MATLAB R2008a) and (Open Filters 1.0.2) programs

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Quino Ortiz, Bryan, José de Jesús Moreno Vázquez, Aldo Rafael Sartorius Castellanos, Antonia Zamudio Radilla i Marcia Lorena Hernández Nieto. "Metodología de conexión utilizando NeuroSKY Mindwave MW003 con MATLAB". EPISTEMUS 13, nr 27 (1.12.2020): 7–12. http://dx.doi.org/10.36790/epistemus.v13i27.110.

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En la actualidad el ímpetu por comprender el funcionamiento del encéfalo ha motivado a compañías como Neurosky en crear e innovar diademas para la obtención de señales encefalográfícas de bajo costo y gran exactitud, enfocadas a la venta para todo tipo de usuario. En el presente trabajo se mostrará la metodología de conexión de la diadema Neurosky MindWave MW003 efectuando el proceso de recepción, envío y configuración inalámbrica (Bluetooth) con el computador, haciendo uso de la librería Thinkgear.h impartida por la empresa Neurosky, realizando un explicación breve y concisa para el uso del dispositivo, estableciendo las características, métodos de operación y funciones principales para su conexión, utilizando la herramienta MATLAB R2015B, el proceso se describe sistemáticamente enfocándose a usuarios inexpertos en la resolución de sus dudas, así mismo contribuir al usuario experimentado en lenguajes de alto nivel en la creación de nuevas aplicaciones.

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Yüzbași, Șuayip, Niyazi Șahin i Ahmet Yıldırımb. "Numerical Solutions of Systems of High-Order Linear Differential-Difference Equations with Bessel Polynomial Bases". Zeitschrift für Naturforschung A 66, nr 8-9 (1.09.2011): 519–32. http://dx.doi.org/10.5560/zna.2011-0015.

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Abstract In this paper, a numerical matrix method, which is based on collocation points, is presented for the approximate solution of a system of high-order linear differential-difference equations with variable coefficients under the mixed conditions in terms of Bessel polynomials. Numerical examples are included to demonstrate the validity and applicability of the technique and comparisons are made with existing results. The results show the efficiency and accuracy of the present work. All of the numerical computations have been performed on computer using a program written in MATLAB v7.6.0 (R2008a).

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Zuo, Dong Guang, Tao Wen, Zhong Ke Li i Zhan Liang Li. "Improved SIFT Algorithm Based on Mixed Programming". Advanced Materials Research 926-930 (maj 2014): 3058–62. http://dx.doi.org/10.4028/www.scientific.net/amr.926-930.3058.

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In order to improve the generality and real-time of image matching procedure, Visual Studio 2010 and MATLAB R2009a have been used as the platform to research mixed programming and improved SIFT algorithm. In this method, the advantages of C # and Matlab have been combined to reduce the difficulty of programming and to improve programming efficiency. The results show that, improved SIFT algorithm can greatly improve real-time of matching program while guaranteeing good matching rate, its suitable in real-time applications.

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Cubas-Martinez, Victor, Adrià Marco-Ahulló, Gonzalo Monfort-Torres, Israel Villarrasa-Sapiña, Alberto Pardo-Ibañez i Xavier Garcia-Masso. "Perfiles de actividad física, obesidad, autoestima y relaciones sociales del alumnado de primaria: un estudio piloto con Self-Organizing Maps (Physical activity, obesity, self-esteem, and social relationship profiles of primary school students: a pilot s". Retos, nr 36 (2.02.2019): 146–51. http://dx.doi.org/10.47197/retos.v36i36.67549.

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Las relaciones sociales son de vital importancia para el correcto desarrollo de los seres humanos, y junto con la actividad física, la obesidad y la autoestima forman un conjunto de factores que pueden ser capaces de retroalimentarse entre sí, pero que hasta donde los autores saben, solo se han analizado por separado. Por tanto, el principal objetivo de estudio será realizar un análisis multifactorial que incluya todas las variables anteriormente mencionadas. Un total de 60 niños de edades comprendidas entre los 7 y los 13 años formaron la muestra de este estudio. Los instrumentos utilizados para las mediciones de las diferentes variables de estudio fueron el PAQ-C, la escala de autoestima de Rosenberg y una adaptación del Bull-S Test. Una vez recogidos todos los datos se realizó un análisis con Self-Organizing Maps mediante el software Matlab R2008a y la SOM toolbox para Matlab. Los resultados obtenidos en este trabajo muestran la repercusión del Índice de Masa Corporal sobre los niveles de autoestima y las relaciones sociales, y la posible retroalimentación mutua entre estos dos últimos factores.Abstract. Social relationships are vital for the proper development of humans, and along with physical activity, obesity, and self-esteem, they form a set of factors that may be able to feed each other; however, as far as the authors know, they have only been analyzed separately. Therefore, the main objective of this study is to carry out a multifactorial analysis that includes all the aforementioned variables. A total of 60 children between 7 and 13 years of age formed the sample of this study. The instruments used for the measurements of the different study variables were the PAQ-C, the Rosenberg self-esteem scale, and an adaptation of the Bull-S Test. Once all the data was collected, an analysis with Self-Organizing Maps was made, using the Matlab R2008a software and the SOM toolbox for Matlab. The results obtained in this work show the repercussion of Body Mass Index on the levels of self-esteem and social relations, and the possible mutual feedback between the last two factors.

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Rozprawy doktorskie na temat "MATLAB R2008b"

Zunt, Tomáš. "Algoritmy pro systémy s technikou adaptivního frekvenčního skákání". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-218172.

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This master's thesis deal the system, which use the Frequency Hopping (FH). Is explained principle those techniques and her benefits and disadvantages. Follows description techniques Adaptive Frequency Hopping (AFH) that used the Bluetooth. Follows description other method for setup hopset such as Dynamic Frequency Hopping (DFH), which used standards 802.22. 22. Is an emerging standard for Wireless Regional Area Networks (WRAN) operating on a license-exempt and non-interference basis in the spectrum allocated to TV broadcast services (between 47–910 MHz). Other method introduces the Adaptive Frequency Rolling (AFR), a particular instance of frequency hopping (FH) that enables the collocated WPANs to cooperate and avoid the self-interference. The AFR uses as input solely the observed packet error rate (PER) and it does not require any exchange of information among the collocated WPANs. The effect of the FR over a longer time interval is that the WPANs use the complete set of disposable channels in an implicit time-division and cooperative manner. Last method described in this Thesis is Dynamic Adaptive Frequency Hopping (DAFH). The basic strategy applied in DAFH is a binary search for a hopset that offers smaller PER. The set of admissible hopsets depends on the total number of available channels and the maximal level of binary divisions. Practical part of the master's thesis describes proposal model AFH, with usage of Matlab Simulink programme. In thesis are described function each blocks a their setting. Simulation parameters can change in simple graphic interface. The model is able to simulate influence of static and dynamic interference in transmission band of two communicating devices.

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Bergami, Luca. "Analisi e ottimizzazione del gruppo di alimentazione e taglio della carta in una macchina incartatrice ad alta velocità". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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L'elaborato si propone di analizzare e ottimizzare il sistema di alimentazione e taglio del materiale da incarto di una macchina incartatrice ad elevata velocità produttiva. Tale macchina si occupa dell'incartamento di dadi da brodo pressati. Gli obiettivi sono quelli di aumentare la qualità del prodotto finale e di incrementare la produttività della macchina. In primo luogo si analizzano le diverse tecniche di rilevazione del diametro bobina di materiale da incarto, al fine di individuarne le migliori. Inoltre si studia la funzione di controllo di tensione del nastro in svolgimento. In seguito viene studiato il sistema di giunzione automatica, necessario per svolgere il processo di cambio bobina senza l'arresto della produzione. La successiva trattazione di modelli cinematici e dinamici rappresentativi del meccanismo di movimentazione del gruppo permettono di valutare le conseguenze dovute ad un aumento di produttività della linea. Viene poi approfondito il sistema ballerino, la cui funzione è quella di garantire il tempo necessario per effettuare la giunzione delle due bobine. Si analizzano tutte le sue funzionalità, definendo un modello matematico che ne descriva i comportamenti cinematici e dinamici, funzionale per verificare il corretto dimensionamento della molla che ne governa la movimentazione. L'obiettivo è quello di aumentarne il tempo di buffer: si sono progettate così due nuove soluzioni di ballerino, studiandone le differenze prestazionali rispetto al ballerino attuale. Infine, per ottenere una migliore qualità del prodotto finale è necessario risolvere alcune problematiche legate alla zona di accoppiamento tra materiale di incarto e dado. Si è sviluppata un'analisi fluidodinamica al fine di studiare il campo di moto dell’aria generato da soffi introdotti per l'accompagnamento del nastro. I risultati dell'analisi hanno permesso di effettuare una riprogettazione dei condotti di alimentazione dei soffi d'aria al fine di ridurre le oscillazioni del nastro.

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SHARMA, MOHIT. "COMBINED ECONOMIC EMISSION DISPATCH USING OPTIM –TOOL". Thesis, 2012. http://dspace.dtu.ac.in:8080/jspui/handle/repository/13900.

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M.TECH
Combined economic emission dispatch (CEED) problem is to schedule the committed generating units’ outputs to meet the required load demand at minimum operating cost with minimum emission simultaneously. This multi-objective CEED problem is converted into a single objective function using a price penalty factor. In this paper, combined economic emission dispatch problem (CEED) problem has been formulated using price penalty factor and solving the problem using GA toolbox of MATLAB R2008b. The multi-objective optimization problem is solved using optimization tool by means of assigning a price penalty factor to the emission function. This method makes it possible to combine the two objective functions into a single objective one. In the proposed method, price penalty factor is calculated and by calculating the value of hi with the described method and MATLAB OPTIMTOOL program is run for each value hi. The m-files for constraint function and objective function are written to execute the program in OPTIMTOOL in MATLAB. The feasibility of the proposed approach is demonstrated for two different power systems, six generators unit and eleven generators units for 500-2500 MW loads and compared with other methods as particle swarm optimization(PSO), differential evolution(DE), -iteration, recursive(RM) and simplified recursive method(SRM) for given systems .Data for six generators unit and eleven generators unit are taken from Scientific Research and Essays, Ugur Guvenc and Electric Power Components and Systems, R. Balamurugan , S. Subramanian. The study results show that the proposed approach is more efficient in finding higher quality solutions in CEED problems. Software used: MATLAB 7.6.0

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Σαρακινιώτη, Βικτωρία. "Διερεύνηση τεχνικών παραμέτρων για δυνατότητες μετάδοσης βίντεο στο πλαίσιο της υποστήριξης υψηλής ποιότητας παρεχόμενων υπηρεσιών στα σύγχρονα ασύρματα δίκτυα". Thesis, 2011. http://hdl.handle.net/10889/5380.

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Η παρούσα διπλωματική εργασία εκπονήθηκε στο Εργαστήριο Ασύρματης Τηλεπικοινωνίας του τμήματος Ηλεκτρολόγων Μηχανικών και Τεχνολογίας Υπολογιστών. Ο στόχος της εργασίας αυτής ήταν η μελέτη της μετάδοσης κωδικοποιημένου βίντεο H.264/AVC στο δίκτυο WiMAX με βάση τη χρήση τριών σχημάτων διαμόρφωσης φυσικού επιπέδου του σήματος βίντεο. Λαμβάνοντας υπόψιν την τεράστια εξέλιξη των ασύρματων δικτύων, αλλά και των συσκευών που μπορούν να υποστηρίξουν πολυμεσικές εφαρμογές, καθιστούν τελικά τη μετάδοση βίντεο μια από τις σημαντικότερες προκλήσεις και ένα δημοφιλή ερευνητικό προσανατολισμό. Σημαντικό ρόλο στη μετάδοση του βίντεο διαδραματίζουν οι παράμετροι που διασφαλίζουν την Ποιότητα των Παρεχόμενων Υπηρεσιών, όπως το εύρος ζώνης, η καθυστέρηση, η διακύμανση της καθυστέρησης και φυσικά η απώλεια πακέτων. Ωστόσο, σε ένα δίκτυο υπάρχουν ποικίλλες παράμετροι που πρέπει να λαμβάνονται υπόψιν κατά τη μετάδοση πολυμεσικής πληροφορίας και στην παρούσα εργασία έγινε μια προσπάθεια να εξεταστεί το θέμα υπό το πρίσμα της διαμόρφωσης φυσικού επιπέδου. Το εργαλείο που χρησιμοποιήθηκε για τη μελέτη αυτή, είναι ο εξομοιωτής δικτύων NS-2, η έκδοση ns-2.29. Για την εξαγωγή των γραφικών παραστάσεων χρησιμοποιήθηκε το Matlab R2009b, ενώ για την εξαγωγή των σχημάτων το Microsoft Office Visio 2010.
This diploma thesis was developed at the Laboratory of Wireless Communications, at the Department of Electrical and Computer Engineering. The objective of this work was to study the transmission of the encoded video H.264/AVC through its transmission over WiMAX network based on the use of three physical layer modulation schemes of the video signal. Considering the tremendous evolution of wireless networks and the fact that modern devices can support multimedia applications, it cannot be denied that video broadcasting is of major importance and constitutes a great challenge for the engineers for further research. Parameters that ensure quality of service, such as bandwidth, delay, delay variation and of course packet loss, play dominant role in the optimization of video transmission. However, in a network, there are various parameters that should be taken into consideration when transmitting multimedia data. The tool used for this study is the network simulator NS-2, the version ns-2.29. In order to export the graphics the software that was used is Matlab R2009b, while the Microsoft Office Visio 2010 software was used to export the figures.

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Książki na temat "MATLAB R2008b"

Martaj, Nadia, i Mohand Mokhtari. MATLAB R2009, SIMULINK et STATEFLOW pour Ingénieurs, Chercheurs et Etudiants. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-11764-0.

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Matlab And Its Applications In Engineering Based On Matlab 75 R2007b. Prentice Hall, 2009.

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Matlab R2009 Simulink Et Stateflow Pour Ingnieurs Chercheurs Et Etudiants. Springer, 2011.

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Mokhtari, Mohand, i Nadia Martaj. MATLAB R2009, SIMULINK et STATEFLOW Pour Ingénieurs, Chercheurs et Etudiants. Springer, 2010.

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Części książek na temat "MATLAB R2008b"

Martaj, Dr Nadia, i Dr Mohand Mokhtari. "Programmation avec MATLAB". W MATLAB R2009, SIMULINK et STATEFLOW pour Ingénieurs, Chercheurs et Etudiants, 241–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-11764-0_7.

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Martaj, Dr Nadia, i Dr Mohand Mokhtari. "Prise en main de MATLAB et SIMULINK". W MATLAB R2009, SIMULINK et STATEFLOW pour Ingénieurs, Chercheurs et Etudiants, 1–63. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-11764-0_1.

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Martaj, Dr Nadia, i Dr Mohand Mokhtari. "Masques et sous-systèmes". W MATLAB R2009, SIMULINK et STATEFLOW pour Ingénieurs, Chercheurs et Etudiants, 429–54. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-11764-0_10.

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Martaj, Dr Nadia, i Dr Mohand Mokhtari. "S-fonctions". W MATLAB R2009, SIMULINK et STATEFLOW pour Ingénieurs, Chercheurs et Etudiants, 455–98. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-11764-0_11.

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Martaj, Dr Nadia, i Dr Mohand Mokhtari. "Les fonctions Callbacks". W MATLAB R2009, SIMULINK et STATEFLOW pour Ingénieurs, Chercheurs et Etudiants, 499–511. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-11764-0_12.

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Martaj, Dr Nadia, i Dr Mohand Mokhtari. "Stateflow". W MATLAB R2009, SIMULINK et STATEFLOW pour Ingénieurs, Chercheurs et Etudiants, 513–86. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-11764-0_13.

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Martaj, Dr Nadia, i Dr Mohand Mokhtari. "Traitement du signal". W MATLAB R2009, SIMULINK et STATEFLOW pour Ingénieurs, Chercheurs et Etudiants, 587–672. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-11764-0_14.

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Martaj, Dr Nadia, i Dr Mohand Mokhtari. "Régulation et contrôle de procédés". W MATLAB R2009, SIMULINK et STATEFLOW pour Ingénieurs, Chercheurs et Etudiants, 673–746. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-11764-0_15.

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Martaj, Dr Nadia, i Dr Mohand Mokhtari. "Contrôle par logique floue". W MATLAB R2009, SIMULINK et STATEFLOW pour Ingénieurs, Chercheurs et Etudiants, 747–805. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-11764-0_16.

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Martaj, Dr Nadia, i Dr Mohand Mokhtari. "Réseaux de neurones". W MATLAB R2009, SIMULINK et STATEFLOW pour Ingénieurs, Chercheurs et Etudiants, 807–78. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-11764-0_17.

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Streszczenia konferencji na temat "MATLAB R2008b"

Talab ABDULLAH, Jalil, Hayder M AL-SAEDI i Ali Hussein SHUAA. "SOLVING NON-LINEAR VOLTERRA INTEGRO-DIFFERENTIAL EQUATIONS USING TOUCHARD METHOD". W VI.International Scientific Congress of Pure,Applied and Technological Sciences. Rimar Academy, 2022. http://dx.doi.org/10.47832/minarcongress6-39.

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In this paper, work effectively built on Touchard polynomials (TPs) was presented to find the solutions of Non-Linear Volterra integro-differential (NLVID) equations of the first, second type and first order. By comparing the exact and approximate solutions for three examples, the accuracy and ability of the offered method were tested. The accuracy of our procedure has been demonstrated by the presented results in tables and graphs. In addition, the solution’s accuracy of this technique has been also presented. All computations and graphics were performed using the MATLAB R2018b programme.

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Guedes Cota, Luciano, Yasmine Neves Maia, André Lage Almeida Dias, Gabriel Azevedo Fogli i Igor Dias Neto de Souza. "Análise da Compensação Feed-forward em Dispositivos Formadores de Rede Monofásico". W Congresso Brasileiro de Automática - 2020. sbabra, 2020. http://dx.doi.org/10.48011/asba.v2i1.1250.

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O trabalho propõe um controle da tensão de saída do filtro LC. Na malha interna de corrente, controladores proporcionais ressonantes são sintonizados para garantir rejeição de distúrbios causados por cargas não-lineares e com isso manter uma boa qualidade da tensão de saída. Uma ação feed-forward da corrente da carga é incluída nesta malha a fim de melhorar a eficácia do projeto proposto. Ademais, o amortecimento ativo da ressonância inerente ao filtro LC é analisado. A malha externa é responsável por garantir um rastreamento assintótico da referência, e para isso, é utilizado um controlador proporcional ressonante sintonizado na frequência fundamental da rede elétrica que se deseja formar. Uma comparação da impedância de saída do sistema em malha aberta e fechada é realizada via software Matlab R2018b. Para verificar a eficácia da estrategia de controle proposta, o conversor é testado para diferentes perfis de carga, e a distorção Harmônica Total (DHT) é utilizada como parâmetro de medição da qualidade da tensão de saída.

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Abbas, Iraq, i Qusay Al-Salami. "Inverted Generational Distance Bat Algorithm for Many-Objective Optimization Problems". W ‎4th International Conference on ‎Administrative ‎& Financial Sciences. Cihan University-Erbil, 2023. http://dx.doi.org/10.24086/icafs2023/paper.905.

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Evolutionary Algorithms (EAs) can be used to solve extremely large-scale Many-Objective Optimization Problems (MOPs/I). Multi-Objective BAT Algorithm based on Inverted Generational Distance MOBAT / IGD, a dominance-decomposition bat algorithm, solves this problem. Due to the Tchebycheff Strategy leader selection process, addressing the issues concurrently inside the BAT foundation may result in rapid convergence. In this paper decomposing the MOP as a Tchebycheff Approach set simplifies it. Dominance allows leaders to scan less densely populated areas, avoiding local optima and producing a more diverse estimated Pareto front as well creating the executives archive. MOBAT/IGD was evaluated to various decomposition-based development methods utilizing 35 standard MOPs. MATLAB produced all results (R2017b).

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J. de Oliveira, Bárbara, Víctor C. S. Campos i Márcio F. Braga. "Estimação de Estados de uma Câmara Termoeletricamente Controlada utilizando Projetos de Filtros H1". W Congresso Brasileiro de Automática - 2020. sbabra, 2020. http://dx.doi.org/10.48011/asba.v2i1.1748.

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O objetivo deste trabalho é apresentar e comparar duas estratégias de filtros para estimação de estados aplicados em uma Câmara Termoeletricamente Controlada (CTC). A CTC é composta por cinco sensores digitais de temperatura que representam os estados do sistema. A aplicação dos métodos é executada em duas etapas. Na primeira etapa, os filtros são implementados de forma off-line no software MATLAB R2018a, a partir dos dados reais do sistema. Enquanto, na segunda etapa, os filtros são aplicados em tempo real no sistema físico. São apresentados dois teoremas para a obtenção dos parâmetros dos filtros robustos tendo como base o lema de Finsler e o bounded real lemma, utilizando a norma Hinf como critério de desempenho, uma vez que emprega-se um modelo politópico incerto para descrever a dinâmica da CTC. O problema de filtragem ótima para o sistema é resolvido por meio de Desigualdades Matriciais Lineares. Os resultados obtidos pelos dois métodos são comparados graficamente e por meio da métrica do Erro Quadrático Médio.

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Kukutla, Pol Reddy, i Bhamidi V. S. S. S. Prasad. "Secondary Air Performance Optimization of a Combined Impingement and Film Cooled Gas Turbine Nozzle Guide Vane". W ASME 2017 Gas Turbine India Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gtindia2017-4608.

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Multi-objective optimization of the film cooled holes for the coupled impingement-film cooled nozzle guide vane is conducted. Two objectives are considered to be minimized: coolant jet exit total temperature and static pressure drop, to assess the trade-off between them. Three-dimensional computationally using SIMPLE algorithm analysis and a k-ω SST turbulence model are used for generating a data base. The plenum mass flow rates and mainstream velocity are considered as the two design variables. The second order polynomial response surface method is chosen to develop the objective function approximation. The multi-objective optimization has been carried out with help of a genetic algorithm and sequential quadratic programing (fminicon) in MATLAB 7.11.0 (R2010b). The Pareto-optimal design points are obtained as the plenum coolant mass flow rate of 0.004kg/s and mainstream velocity of 10m/s. Based on these results, the global minimum coolant jet static pressure drop of 32.5 Pa and global minimum jet exit total temperature of 312K are observed for the film holes of the NGV surface. At these operating conditions, the coupled impingement -film cooled NGV is subjected to its higher safety and durability. This happened due to without cause of hot gas ingestion into the film cooled jets of the typically cooled NGV.

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Mahutga, Ryan R., Stephen P. Gent i Michael P. Twedt. "Developing a Model to Predict the Torrefaction of Biomass". W ASME 2014 8th International Conference on Energy Sustainability collocated with the ASME 2014 12th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/es2014-6377.

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With increasing fuel costs and more emphasis being placed on sustainable sources of energy, biomass from agricultural residues and energy crops are becoming an increasingly viable value-added resource for the rural economies in United States and throughout the world. Torrefaction, a thermochemical reaction process, is a form of mild-pyrolysis that improves the qualities of biomass feedstocks for use as a fuel similar to charcoal. This research presents a user-centered computational framework to predict the effects of torrefaction of biomass. The reaction model is based on recently developed models for the torrefaction of willow. The basis for this model is a two stage, solid mass loss kinetics reaction where Arrhenius kinetic parameters are estimated based on experimentally obtained TGA data. Utilizing these parameters along with solid product formation equations it is possible to determine the solid mass yield, as well as the yields of the two stages of pseudo-volatiles released during reaction. Chemical species composition of the volatiles is determined from a system of constrained linear equations based on calculated volatile yield data and experimental results. The reaction model is implemented into MATLAB R2012b as a standalone program with a graphical user interface to obtain inputs, and display numeric and graphic results. The overall goal of this model is to provide a guide for improving conversion efficiency of biomass to bio-char.

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Karunarathne, Sumudu, Jeanette Larsen i Lars Erik Øi. "Mathematical Models for Physicochemical Properties of Different Amine-based Solvents in Post combustion CO2 Capture". W 63rd International Conference of Scandinavian Simulation Society, SIMS 2022, Trondheim, Norway, September 20-21, 2022. Linköping University Electronic Press, 2022. http://dx.doi.org/10.3384/ecp192021.

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In order to reduce global CO2 emissions, CO2 capture based on absorption in an amine/water mixture is an established method. To develop such processes, correct physicochemical properties like densities and viscosities are important.The first objective of this work is to explore mathematical correlations for fitting viscosity data for aqueous Monoethanolamine (MEA) and Methyldiethanolamine (MDEA). A second objective is to evaluate the prediction of viscosity based on parameters independent of viscosity measurements.13 developed correlations have been evaluated by comparing the maximum deviation of fitted models to the measured property, and by determining the average absolute relative deviation (AARD%). Python 3.6, MATLAB R2020b and Excel were used as the tools for regression.The results indicated that viscosity for aqueous amines was better correlated by Eyring’s viscosity model based on NRTL (Non-Random-Two Liquid model) rather than a Redlich-Kister correlation. The achieved AARD% of aqueous MEA were 2.39 for Redlich-Kister, 1.87 for Eyring-NRTL and 1.88 for the segment-based Eyring-NRTL model. The same trend was achieved for aqueous MDEA with AARD% of 3.04, 2.23 and 1.88 for different approaches.The possibility of using data from vapor/liquid equilibrium parameters to predict viscosity in MEA/water and MDEA/water was evaluated. Using parameters in the equilibrium model NRTL from the simulation program Aspen HYSYS in a model from Karunarathne indicated that it is possible to predict viscosity reasonably well without experimental viscosity data.

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Mou, Nasi, Poh Seng Lee i Saif A. Khan. "A Simplified ‘Effective Circuit’ Fluid Flow Model for Forced Convection in Oblique Fin Configuration". W ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-37825.

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In this paper, a simplified ‘effective circuit’ fluid flow model is proposed to complement full-domain (geometry based) simulations of fluid flow in novel discrete oblique fin heat sinks. In the proposed model, the discrete flow paths are modeled as effective resistances, and the intersections between discrete flow paths are modeled as ‘nodes’. In an electrical circuit, the current of each branch can be derived from the current division rule, and hence the actual flow rates in the effective circuit are determined by the effective resistances. Simulink R2011b, a graphical extension to MATLAB for modeling and simulation of systems, is chosen to construct the equivalent circuit. The effective resistances are calculated using the well-known friction factor expressions for laminar flow in micro-channels. A full-domain geometry-based simulation is performed on CFX 14.0 serving as a benchmark for the developed ‘effective circuit’ fluid flow model. The results show that for a given total current value and mass flow rate, the difference of pressure drop over the whole heat sink between the simplified flow model and CFX simulation is within 13%. The mass flow distributions obtained from the simplified flow model and the CFX simulation exhibit a common distribution pattern. Interestingly, the simplified flow model is even able to capture flow migration — a distinctive phenomenon of flow in oblique fin geometries. We thus confirm the feasibility of the method of construction of our simplified ‘effective circuit’ fluid flow model.

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Petrisor, Silviu mihai, Ghita Barsan i Ramona mihaela Petrisor. "THE ROBO SECURITY MINI ROBOT BETWEEN CONTEMPORARY MILITARY IMPERATIVES AND THE NEW EDUCATIONAL PARADIGM". W eLSE 2013. Carol I National Defence University Publishing House, 2013. http://dx.doi.org/10.12753/2066-026x-13-129.

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Among the factors that are able of shaping the identity of the XXI century human, education is included (I am what I learn, how much I learn and how I learn, as well). The transposition of imperatives of the moment at educational level is reflected in the use of e-learning - a viable alternative to traditional educational methods. The authors of this paper aim to bring to attention the idea that by pedagogical valorisation, e-learning can move from the position of end in itself to that of means of rendering the educational endeavor more efficient; the appropriate use thereof bringing its contribution to the achievement of both the formative performance, requested by the realities of the moment, and the building of an individual architecture that no longer revolve solely around the concept of high volume, but to also turn to that of high value. Fructification of pedagogical - educational qualities of e-learning, in conjunction with the need to find an appropriate response to the current challenges faced by the military environment - for instance the digitization of the battlefield - are able to generate educational content that reflect the cooperation between human intelligence and artificial intelligence. The example proposed in this material highlights the way in which, with the help of the MATLAB R2011b software, the Robo Security wheeled mini robot prototype, a project designed and built within the Advanced Logistic Technologies Laboratory, the Management and Technology Research Center of the Nicolae Balcescu Land Forces Academy from Sibiu - can be simulated and modeled to contribute to the military security field within virtual workspaces.

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Hayati, Hasti, Paul Walker, Terry Brown, Paul Kennedy i David Eager. "A Simple Spring-Loaded Inverted Pendulum (SLIP) Model of a Bio-Inspired Quadrupedal Robot Over Compliant Terrains". W ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-87134.

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To study the impact of compliant terrains on the biomechanics of rapid legged movements, a well-known spring loaded inverted pendulum (SLIP) model is deployed. The model is a three-degrees-of-freedom system (3 DOF), inspired by galloping greyhounds competing in a racing condition. A single support phase of hind-leg stance in a galloping gait is taken into consideration due to its primary function in powering the greyhounds locomotion and higher rate of musculoskeletal injuries. To obtain and solve the nonlinear second-order differential equation of motions, the Lagrangian method and MATLABb R2017b (ode45 solver), which is based on the Runge-Kutta method, has been used, respectively. To get the viscoelastic behavior of compliant terrains, a Clegg hammer test was developed and performed five times on each sample. The effective spring and damping coefficients of each sample were then determined from the hysteresis curves. The results showed that galloping on the synthetic rubber requires more muscle force compared with wet sand. However, according to the Clegg hammer test, wet sand had a higher impact force than synthetic rubber which can be a risk factor for bone fracture, particularly hock fracture, in greyhounds. The results reported in this paper are not only useful for identifying optimum terrain properties and injury thresholds of an athletic track, but also can be used to design control methods and shock impedances for legged robots performing on compliant terrains.

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