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Journal articles on the topic 'Matlab Codes'

Author: Grafiati

Published: 4 June 2021

Last updated: 20 February 2023

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1

Koko, Jonas. "Vectorized Matlab Codes for Linear Two-Dimensional Elasticity." Scientific Programming 15, no. 3 (2007): 157–72. http://dx.doi.org/10.1155/2007/838942.

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A vectorized Matlab implementation for the linear finite element is provided for the two-dimensional linear elasticity with mixed boundary conditions. Vectorization means that there is no loop over triangles. Numerical experiments show that our implementation is more efficient than the standard implementation with a loop over all triangles.

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2

Ijemaru, Gerald K., Augustine O. Nwajana, Emmanuel U. Oleka, Richard I. Otuka, Isibor K. Ihianle, Solomon H. Ebenuwa, and Emenike Raymond Obi. "Image processing system using MATLAB-based analytics." Bulletin of Electrical Engineering and Informatics 10, no. 5 (October 1, 2021): 2566–77. http://dx.doi.org/10.11591/eei.v10i5.3160.

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Owing to recent technological advancement, computers and other devices running several image editing applications can be further exploited for digital image processing operations. This paper evaluates various image processing techniques using matrix laboratory (MATLAB-based analytics). Compared to the conventional techniques, MATLAB gives several advantages for image processing. MATLAB-based technique provides easy debugging with extensive data analysis and visualization, easy implementation and algorithmic-testing without recompilation. Besides, MATLAB's computational codes can be enhanced and exploited to process and create simulations of both still and video images. Moreover, MATLAB codes are much concise compared to C++, thus making it easier for perusing and troubleshooting. MATLAB can handle errors prior to execution by proposing various ways to make the codes faster. The proposed technique enables advanced image processing operations such as image cropping/resizing, image denoising, blur removal, and image sharpening. The study aims at providing readers with the most recent MATLAB-based image processing application-tools. We also provide an empirical-based method using two-dimensional discrete cosine transform (2D-DCT) derived from its coefficients. Using the most recent algorithms running on MATLAB toolbox, we performed simulations to evaluate the performance of our proposed technique. The results largely present MATLAB as a veritable approach for image processing operations.

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3

Kambali, Imam. "Calculated Radioactivity Yields of Gallium-67 using Matlab Codes." Jurnal Sains Materi Indonesia 21, no. 1 (May 1, 2020): 21. http://dx.doi.org/10.17146/jsmi.2019.21.1.5679.

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In nuclear medicine, gallium-67 (67Ga) is potentially applied for imaging a certain type of tissue. In this investigation, 67Ga is theoretically studied in terms of its potential radioactivity yields at the end of various energetic proton bombardments. Nuclear cross-sections derived from the Talys Evaluated Nuclear Data Library (TENDL) 2017 were used as the input files, while a Matlab code was developed to perform the yield calculations of 67Zn(p,n)67Ga and 68Zn(p,2n)67Ga nuclear reactions to produce 67Ga. Two different targets – enriched 67Zn and natZn targets – were simulated in the calculations. The calculated yields suggested that a maximum of 27.37 MBq/µAh could be achieved when enriched 67Zn target was irradiated with 15-MeV protons, whereas 46.99 MBq/µAh could be generated following a 30 MeV proton bombardment of enriched 68Zn target. Various radioactive gallium impurities, i.e. 63,64,65,66,68,70Ga and stable 69Ga isotope were also expected to be generated mostly via (p,n) and (p,2n) reactions when natZn target was used in the 67Ga production. In contrast, radioactive 66Ga and 68Ga impurities were mainly produced following bombardment of enriched 67Zn and 68Zn targets. This study can be used as a reference for future 67Ga radionuclide production.

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4

Gomez, C., J. E. Gonzalez, and J. M. Pardo. "Communication systems simulator with error correcting codes using MATLAB." European Journal of Engineering Education 28, no. 4 (December 2003): 483–90. http://dx.doi.org/10.1080/0304379032000101845.

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5

Abdulhamid, Mohanad, and Mbugua Thairu. "Performance Analysis of Turbo Codes Over AWGN Channel." Scientific Bulletin of Electrical Engineering Faculty 19, no. 1 (April 1, 2019): 43–48. http://dx.doi.org/10.1515/sbeef-2019-0009.

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AbstractTurbo coding is a very powerful error correction technique that has made a tremendous impact on channel coding in the past two decades. It outperforms most known coding schemes by achieving near Shannon limit error correction using simple component codes and large interleavers. This paper investigates the turbo coder in detail. It presents a design and a working model of the error correction technique using Simulink, a companion softwareto MATLAB. Finally, graphical and tabular results are presented to show that the designed turbo coder works as expected.

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6

Angulo, Hugo, and Manolo Paredes. "Design and Development of a Software Defined Radio for Ecuadorian Army, trough the use of a USRP and Simulink tool of Matlab." MASKAY 2, no. 1 (November 1, 2012): 68. http://dx.doi.org/10.24133/maskay.v2i1.150.

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This research presents a design of a software defined radio using the USRP and Simulink software of Matlab. Based on voice digitalization, it was considered necessary to implement the codec G.726 of ITU, in 32 Kbps version, to perform the respective comparison with 64 Kbps G.711 codec, which was developed as a Simulink's block set. To provide sturdiness to the system, it was used an appropriate channel coding. This was achieved through the use of block codes and interlaced or Trellis, such as Convolutional codes. Finally, both systems are proposed with QPSK modulation and frequency modulation, with the hope of providing a significant contribution and comparative development to SDR systems, through the assessment by the BER.

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7

Kizilcay Abdulla, F. G., and R. Abdulla. "A Comparative Application for Evaluating Composite Fabrics Used in Electromagnetic Shielding." Engineering, Technology & Applied Science Research 7, no. 6 (December 18, 2017): 2156–59. http://dx.doi.org/10.48084/etasr.1480.

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Composite fabrics containing metal filaments are used widely for preventing electromagnetic radiation. Many experiments involving them are carried out continuously. Results are simulated in order to analyze their performance. Coding in Matlab is a popular method to compare the electromagnetic shielding properties of composite fabrics but for different options Matlab codes must be edited each time. Scientists who are not experts in coding have difficulties on editing such codes. To overcome this, an application written in C# in Visual Studio with .Net platform was developed. This application is integrated with Bunifu, which allows the application to be well designed. The proposed interface is user friendly and lets the user choose the available fabric with its stitch length from panel section. By setting options one can get the electromagnetic parameters such as scattering (S) parameters, reflection, transmission and absorption coefficients and total shielding effectiveness (SE) values with one click. As the application is integrated with Matlab codes, output is given as a Matlab graph with desired options. In this way the distinctions between the chosen fabrics can be analyzed easily.

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8

Bos, Len, and Marco Vianello. "CaTchDes: MATLAB codes for Caratheodory–Tchakaloff Near-Optimal Regression Designs." SoftwareX 10 (July 2019): 100349. http://dx.doi.org/10.1016/j.softx.2019.100349.

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9

Yan, Tian Yun, Kai Kuo Xu, Wei Wei, and Hong Wei Zhang. "A Virtual Experiment Platform Based on Matlab Webserver." Advanced Materials Research 216 (March 2011): 605–8. http://dx.doi.org/10.4028/www.scientific.net/amr.216.605.

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The concept of virtual experiment platform and matlab webserver, the fundamental principles and system configurations of Matlab Webserver are introduced in detailed. The key process and source codes are divided into three essential parts in the simulation system, and they are Mfile, HTML input interface and HTML output document. Finally, the simulating result is presented.

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10

Wirastuti, N. M. A. E. D., I. M. A. Suyadnya, and D. C. Khrisne. "Performance Assessment of OFDM System using Reed-Solomon Codes over Fading Channels." Journal of Electrical, Electronics and Informatics 2, no. 2 (August 31, 2018): 48. http://dx.doi.org/10.24843/jeei.2018.v02.i02.p06.

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This paper study the performance of Orthogonal Frequency Division Multiplexing (OFDM) system over AWGN and Rayleigh fading channels. OFDM performs multi-carrier transmission where all the subcarriers are orthogonal to each other. The channel coding was applied to improve the OFDM system performance. Reed Solomon (RS) codes was chosen that an efficient channel coding algorithm and has intense error correction ability. Adding the benefits of multicarrier OFDM system and Reed Solomon codes to achieve the expected system performance. The coded OFDM system was modeled over and simulated using Matlab. The bit error rate (BER) and energy bit (Eb) per noise power density (No) was performed during system simulations. QPSK modulation was used to modulate the random bits. From the simulation results It can be seen that BER vs. EB/No parameter for Coded OFDM system lower than uncoded OFDM. This was because RS codes succeed to correcting the error generated along data transmission.

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11

Yashavantha, Kumar G. A., and K. M. Sathish Kumar. "Development of MATLAB Codes to Find the Natural Frequencies of a Composite Structure." Applied Mechanics and Materials 895 (November 2019): 319–23. http://dx.doi.org/10.4028/www.scientific.net/amm.895.319.

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Modal analysis is a method to describe the dynamic properties of structure such as natural frequency, mode shape and damping ratio. These properties are important for design and analysis of structure in dynamic condition. MATLAB is a high-performance numerical computation and visualization software package. It provides an interactive environment with hundreds of built-in functions for technical computation, graphics, and animation. In present analysis, use of MATLAB is done for finding the free vibrational characteristics of a structure made of composite material. The study involves finding the natural frequencies of structure made of Glass-epoxy, Carbon-epoxy and Graphite fiber reinforced polyamide materials. In this case Euler’s-Bernoulli beam theory is used for analytical solution and to construct MATLAB codes. The structure considered here is a beam with fixed-free condition. The results obtained from the MATLAB are accurate comparatively, the results obtained shows that the MATLAB can be further used to write programs which involve complicated iterations and cannot be done manually. The further work can be extended for writing the programs of much more complex equations in MATLAB and obtains exact solution.

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Kurkin, Evgenii Igorevich, Vladislava Olegovna Chertykovtseva, and Yaroslav Vyacheslavovich Zakhvatkin. "Processing a Brookfield Rotational Viscometer Measurement Results in the MATLAB." Key Engineering Materials 834 (March 2020): 82–89. http://dx.doi.org/10.4028/www.scientific.net/kem.834.82.

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The Brookfield_to_MATLAB and ViscosityApproximation codes for processing of experiments results for determination of viscosity on a rotational Brookfield DV3T viscometer is developed in the MATLAB. The codes allow to carry out automatic capture data, to calculate the shear rate for standard spindles RV-1 ... RV-7, to sort the measurement results on temperatures, to combine the experimental data and to determine the coefficients of the Andrade type power-law model. Paper describes experiment results on determination of viscosity of the epoxy binder reinforced by short carbon fibers. The coefficients of the viscosity model are determined by the linear regression coefficients. The obtained determination coefficient shows a good agreement of the model with the experimental data. The results are used for study various contents of a mass fraction of fibers: 0%, 5%, 10%, and 15%.

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13

Al azzawi, Fatima Faydhe. "LTE RF receiver modeling and each part testing with MATLAB simulink." Indonesian Journal of Electrical Engineering and Computer Science 14, no. 3 (June 1, 2019): 1251. http://dx.doi.org/10.11591/ijeecs.v14.i3.pp1251-1257.

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fourth generation cellular network based on Long Term Evaluation (LTE) air interface. LTE is specifically designed for packet data communications, where the emphasis of the technologies high spectral efficiency, high peak data rates, low latency, and frequency flexibility. In this paper a LTE physical layer design and implemented using MATLAB codes and Simulink, where MATLAB codes generate the 64 QAM transmitting signal and simulating LTE frames while Simulink model perform the physical layer which including the band limiting, free space path loss adding, channel, RF receiver, demodulation, 10-bit ADC, DC offset cancellation, saving data to preform EVM measurements, and viewing the spectrum signal after each block, finally QAM with multi –order tested under AWGN.

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14

Li, Hong-Shuang, and Zi-Jun Cao. "Matlab codes of Subset Simulation for reliability analysis and structural optimization." Structural and Multidisciplinary Optimization 54, no. 2 (March 17, 2016): 391–410. http://dx.doi.org/10.1007/s00158-016-1414-5.

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15

Ansari, A. S., T. Shah, Zia Ur-Rahman, and Antonio A. Andrade. "Sequences of Primitive and Non-primitive BCH Codes." TEMA (São Carlos) 19, no. 2 (September 12, 2018): 369. http://dx.doi.org/10.5540/tema.2018.019.02.369.

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In this work, we introduce a method by which it is established that; how a sequence of non-primitive BCH codes can be obtained by a given primitive BCH code. For this, we rush to the out of routine assembling technique of BCH codes and use the structure of monoid rings instead of polynomial rings. Accordingly, it is gotten that there is a sequence $\{C_{b^{j}n}\}_{1\leq j\leq m}$, where $b^{j}n$ is the length of $C_{b^{j}n}$, of non-primitive binary BCH codes against a given binary BCH code $C_{n}$ of length $n$. Matlab based simulated algorithms for encoding and decoding for these type of codes are introduced. Matlab provides built in routines for construction of a primitive BCH code, but impose several constraints, like degree $s$ of primitive irreducible polynomial should be less than $16$. This work focuses on non-primitive irreducible polynomials having degree $bs$, which go far more than 16.

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16

Fan, Meng Hua. "Using Excel and MATLAB to Calculate Liquid Limit of Soil." Advanced Materials Research 926-930 (May 2014): 3326–29. http://dx.doi.org/10.4028/www.scientific.net/amr.926-930.3326.

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This paper explains and demonstrates how to calculate liquid limit of soil with TREND function of Excel and MATLAB via test data. The current graphical methods to determine liquid limit exist estimated reading results being not accurate enough. The TREND function of Excel was introduced and the related Excel worksheet was created, corresponding codes in MATLAB were programming similarly. The method of using Excel spreadsheets or MATLAB is very simple, efficient and accurate.

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17

Liu, Jie, Li Min Zhang, and Zhao Gen Zhong. "Blind Recognition of Recursive System Convolutional Codes." Applied Mechanics and Materials 631-632 (September 2014): 816–19. http://dx.doi.org/10.4028/www.scientific.net/amm.631-632.816.

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Recursive system convolutional codes (RSC codes) are the commonly used coding form for Turbo sub-encoders. For blind recognition problem of RSC codes, a novel method is proposed to recognize code parameters and generator polynomials. Firstly, code parameters are estimated by analyzing matrix constructed from the received codeword. Then, the mathematical model for recognition of generator polynomials is derived according to RSC codes’ characteristics, and the specific implementation steps are introduced. Finally, simulation results from Matlab show that the performance of the method is obviously more excellent than other methods, which indicates great significance to further research on Turbo codes.

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18

Dong, Xue Dong. "Generating Idempotents of Quartic Residue Codes over the Field." Applied Mechanics and Materials 519-520 (February 2014): 953–56. http://dx.doi.org/10.4028/www.scientific.net/amm.519-520.953.

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The generating polynomials of higher power residue codes over finite fields are difficult to construct. This paper gives explicit expressions of generating idempotents of quartic residue codes over the field $F_4$.The result will enable one to construct the generating polynomials of quartic residue codes over the field $F_4$ by computing the greatest common divisors of these generating idempotents and the polynomial $x^n-1$ with computer software such as Matlab and Maple.

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19

Ahmad, A., M. J. Al-Mushrafi, and S. Al-Busaidi. "Simulation of m-Sequence’s Properties Through MATLAB-SIMULINK." Sultan Qaboos University Journal for Science [SQUJS] 7, no. 1 (June 1, 2002): 147. http://dx.doi.org/10.24200/squjs.vol7iss1pp147-156.

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Based on an analytical study of the theory of m-sequences, a tool is developed to facilitate practicing engineers to either generate m-sequence for its application, or to test applied m-sequence, or both. The developed test–kit simulates all the properties of m-sequences including number of 1s and 0s, the run lengths, pulse periods as well as autocorrelation properties. This simplified tool is developed using MATLAB–SIMULINK with required codes as well as desired blocks. The model is cost-effective and the output files of the generated SIMULINK models can be utilized in any software program or simulation procedures.

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20

Dong, Xue Dong. "Generating Idempotents of Cubic Residue Codes over the Field F₄." Applied Mechanics and Materials 385-386 (August 2013): 1797–800. http://dx.doi.org/10.4028/www.scientific.net/amm.385-386.1797.

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The generating polynomials of higher power residue codes over finite fields are factors of the polynomial .Generally speaking; it is difficult to factor the polynomial over finite fields. This paper gives generating idempotents of cubic residue codes over the field .As a result, the generating polynomials of cubic residue codes over the field can be obtained by computing the greatest common divisors of these generating idempotents and the polynomial with computer software such as Matlab and Maple.

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21

Maksymov, Volodymyr, Vyacheslav Noskov, and Igor Khrapovytsky. "NEW BARKER’s COMPOSITE CODES AS MODULATION SIGNALS IN BROADBAND COMMUNICATION SYSTEMS." Information and Telecommunication Sciences, no. 2 (December 19, 2022): 15–20. http://dx.doi.org/10.20535/2411-2976.22022.15-20.

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Background. Currently noise-like signals (NLS) are widely used and provide high level of jamming immunity and security in broadband communication systems (BСS) when transmitting confidential information in an open radio channel, especially in emergencies. Increasing the efficiency of the NLS is possible when using more advanced code structures. Objective. The purpose of this research is to study new Barker’s composite codes as modulation signals in broadband communication systems. Method. Simulation modeling based on MatLab software package and analytical calculation methods are used. Results. Modeling in the MatLab software package showed the possibility for using new Barker’s composite codes as modulation signals in direct spread spectrum systems but efficiency depends on code words length as well as type synchronization signal. Conclusions. Analysis of research results shows that the new Barker composite codes 21a, 33a, 49, 77a, 121 can be effectively used as modulation code words in broadband systems with direct spectrum expansion.

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Mergu, Kattaswamy. "Performance Analysis of Reed-Solomon Codes Concatenated with Convolutional Codes over AWGN Channel." APTIKOM Journal on Computer Science and Information Technologies 1, no. 1 (March 1, 2016): 27–32. http://dx.doi.org/10.11591/aptikom.j.csit.100.

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With rapid growth in today’s technology, digital communication is playing a major role to provide hostile environment to meet various applications. In this communication, Coding plays a prominent role to contribute error free transmission through channel coding which improves capacity of a channel by adding some redundant bit to the original information. One way to provide a better performance of the communication system is by concatenating different types of channel coding techniques. The concatenation can be done either in parallel or serial. The primary aim of this paper is to concatenate the Reed-Solomon codes with Convolutional codes in series, which provides better results comparing with single coding techniques. The performance of the concatenation of Reed-Solomon codes with Convolutional codes can be evaluated by finding bit error rate with various values of signal-to-noise ratio over AWGN channel. The analytical result has been obtained by using MATLAB/OCTAVE.

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23

M Mohamed, Ibrahim M., and Omlkhayr Miftah Abdulrahman. "SAC-based OCDMA codes: A comparison." ELEKTRIKA- Journal of Electrical Engineering 21, no. 1 (April 20, 2022): 20–24. http://dx.doi.org/10.11113/elektrika.v21n1.340.

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: Optical code division multiple access OCDMA is one of the promising optical access technologies due to its worth-mentioning features, such as asynchronous access, and high security. In this paper, the author performed an analytical-based comparison between three commonly used spectrum amplitude coding SAC-based OCDMA codes, namely: Modified Frequency Hopping MFH, Hadamard, and Enhanced Double Weight EDW. The comparison was made based on bit-error-rate BER observation in each case. Matlab was used to conduct this comparison. The results confirm that EDW is the best choice due to its fixed weigh. The only dilemma when adopting EDW code is how to select the proper weight.

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M Mohamed, Ibrahim M., and Omlkhayr Miftah Abdulrahman. "SAC-based OCDMA codes: A comparison." ELEKTRIKA- Journal of Electrical Engineering 21, no. 1 (April 20, 2022): 20–24. http://dx.doi.org/10.11113/elektrika.v21n1.340.

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: Optical code division multiple access OCDMA is one of the promising optical access technologies due to its worth-mentioning features, such as asynchronous access, and high security. In this paper, the author performed an analytical-based comparison between three commonly used spectrum amplitude coding SAC-based OCDMA codes, namely: Modified Frequency Hopping MFH, Hadamard, and Enhanced Double Weight EDW. The comparison was made based on bit-error-rate BER observation in each case. Matlab was used to conduct this comparison. The results confirm that EDW is the best choice due to its fixed weigh. The only dilemma when adopting EDW code is how to select the proper weight.

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25

Li, Tong, Cheng Lin Miao, and Jun Lv. "An Improved Algorithm of RS Codes Blind Recognition." Applied Mechanics and Materials 602-605 (August 2014): 2308–12. http://dx.doi.org/10.4028/www.scientific.net/amm.602-605.2308.

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The acquisition of information about channel coding sequences is the research emphasis and difficulties at present, and recognizing the channel coding parameters is the prerequisite for information acquisition. RS Codes are a class of linear block codes as well as a special class of BCH Codes and cyclic codes. It regards a group of symbols with a length of n as a unit to process with, and the n symbols are generated by k transmitting information symbols under some proper associated rules. RS Codes are widely used in various communication systems. In this paper, an algorithm of RS Codes blind recognition is researched. And a blind recognition model is established on MATLAB. At last, the paper presents the recognition rates of situations with different error rates.

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26

Mergu, Kattaswamy. "Performance Analysis of Reed-Solomon Codes Concatenated with Convolutional Codes over AWGN Channel." APTIKOM Journal on Computer Science and Information Technologies 1, no. 1 (February 16, 2016): 27–32. http://dx.doi.org/10.34306/csit.v1i1.41.

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With rapid growth in today’s technology, digital communication is playing a major role to provide hostile environment to meet various applications. In this communication, Coding plays a prominent role to contribute error free transmission through channel coding which improves capacity of a channel by adding some redundant bit to the original information. One way to provide a better performance of the communication system is by concatenating different types of channel coding techniques. The concatenation can be done either in parallel or serial. The primary aim of this paper is to concatenate the Reed-Solomon codes with Convolutional codes in series, which provides better results comparing with single coding techniques. The performance of the concatenation of Reed-Solomon codes with Convolutional codes can be evaluated by finding bit error rate with various values of signal-to-noise ratio over AWGN channel. The analytical result has been obtained by using MATLAB/OCTAVE.

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27

Tang, Yu. "Simulation Research on how to Improve the Range Resolution of Pulse Compression Radar Based on Phase Coding." Applied Mechanics and Materials 143-144 (December 2011): 634–38. http://dx.doi.org/10.4028/www.scientific.net/amm.143-144.634.

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Phase coded radar signal is one of the pulse-pulse modulation signal in the radar system. Based on the characteristics of matched filtering, we theoretically analyze the basic principle of the phase coded compression radar system. In the Matlab platform, we set up a simulation model which is used for matching filter, when the radar transmitting signal is Barke code signal. The simulation results show that Echo signal can obtain certain pulse compression ratio. By the matched filter, the main lobe amplitude of 13 bits Barker code signal is 22 times the rate of side-lobe. 13 bits Barker codes by the matched filter have the maximum pulse compression ratio.

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Boscolo, Antonio, Francesca Vatta, Francesco Armani, Emanuele Viviani, and Daniele Salvalaggio. "Physical AWGN Channel Emulator for Bit Error Rate Test of Digital Baseband Communication." Applied Mechanics and Materials 241-244 (December 2012): 2491–95. http://dx.doi.org/10.4028/www.scientific.net/amm.241-244.2491.

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This paper presents a physical channel emulator solution for applications such as Bit Error Rate Testing of Error Correcting Codes. The solution relies on an analog White Gaussian Noise Generator coupled additively with an analog data signal to emulate the communication channel. This is interfaced to a computer through a USB connection, allowing the use of programs in different environments, such as Matlab and Labview. This solution can allow different types of channels to be emulated and with different noise sources. A software-based method to measure Signal to Noise Ratio and to characterize the channel is also presented. The system has been validated using a Matlab interface implementing multiple error correcting codes and showed good agreement with the theoretical model.

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29

Yadav, Rahul. "Finite Element Analysis using MATLAB." International Journal for Research in Applied Science and Engineering Technology 10, no. 1 (January 31, 2022): 764–69. http://dx.doi.org/10.22214/ijraset.2022.39902.

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Abstract: Finite Element Analysis or FEA is the simulation of a physical phenomenon using a numerical mathematic technique referred to as the Finite Element Method or FEM. This process is at the core of mechanical engineering, as well as a variety of other disciplines. It also is one of the key principles used in the development of simulation software. Engineers can use these FEM to reduce the number of physical prototypes and run virtual experiments to optimize their designs. Finite Element Analysis is used in various fields like structural, fluid flow, heat transfer to estimate the behavior of a component in real environment. There now exists growing body of knowledge connected with the development of mathematical models and numerical simulations of physical model. There are various software packages like Ansys, OptiStruct, COMSOL, Solidworks and many more which provide a close estimate in simulation models. Apart from these software MATLAB also has a Partial Differential Equation (PDE) toolbox which enables us to perform these simulations using some built-in functions and codes. However, a computational numerical technique is not an end of design rather it just provides a great estimate of the final component for which the results are only as good as the input provided and the final component in most of the cases require a physical testing in environment which it is meant to perform as a validation. Keywords: Brake pedal, MATLAB, Partial differential equation (PDE) toolbox, Tetrahedral mesh.

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Yadav, Rajesh, and Gurjit Kaur. "Modified Three-Dimensional Multicarrier Optical Prime Codes." International Journal of Optics 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/2683607.

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We propose a mathematical model for novel three-dimensional multicarrier optical codes in terms of wavelength/time/space based on the prime sequence algorithm. The proposed model has been extensively simulated on MATLAB for prime numbers (P) to analyze the performance of code in terms of autocorrelation and cross-correlation. The simulated outcome resembles the mathematical model and gives better results over other methods available in the literature as far as autocorrelation and cross-correlation are concerned. The proposed 3D optical codes are more efficient in terms of cardinality, improved security, and providing quality of services.

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31

Öner, Metin, and İpek Deveci Kocakoç. "JMASM 49: A Compilation of Some Popular Goodness of Fit Tests for Normal Distribution: Their Algorithms and MATLAB Codes (MATLAB)." Journal of Modern Applied Statistical Methods 16, no. 2 (December 4, 2017): 547–75. http://dx.doi.org/10.22237/jmasm/1509496200.

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32

Ibáñez, Javier, Jorge Sastre, Pedro Ruiz, José M. Alonso, and Emilio Defez. "An Improved Taylor Algorithm for Computing the Matrix Logarithm." Mathematics 9, no. 17 (August 24, 2021): 2018. http://dx.doi.org/10.3390/math9172018.

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The most popular method for computing the matrix logarithm is a combination of the inverse scaling and squaring method in conjunction with a Padé approximation, sometimes accompanied by the Schur decomposition. In this work, we present a Taylor series algorithm, based on the free-transformation approach of the inverse scaling and squaring technique, that uses recent matrix polynomial formulas for evaluating the Taylor approximation of the matrix logarithm more efficiently than the Paterson–Stockmeyer method. Two MATLAB implementations of this algorithm, related to relative forward or backward error analysis, were developed and compared with different state-of-the art MATLAB functions. Numerical tests showed that the new implementations are generally more accurate than the previously available codes, with an intermediate execution time among all the codes in comparison.

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Koko, Jonas. "Efficient MATLAB Codes for the 2D/3D Stokes Equation with the Mini-Element." Informatica 30, no. 2 (January 1, 2019): 243–68. http://dx.doi.org/10.15388/informatica.2019.205.

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Singh, Sagar, Ali Ismet Kanli, and Sagarika Mukhopadhyay. "Full waveform inversion in time and frequency domain of velocity modeling in seismic imaging: FWISIMAT a Matlab code." Earth Sciences Research Journal 22, no. 4 (October 1, 2018): 291–300. http://dx.doi.org/10.15446/esrj.v22n4.59640.

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This paper investigates the capability of acoustic Full Waveform Inversion (FWI) in building Marmousi velocity model, in time and frequency domain. FWI is an iterative minimization of misfit between observed and calculated data which is generally solved in three segments: forward modeling, which numerically solves the wave equation with an initial model, gradient computation of the objective function, and updating the model parameters, with a valid optimization method. FWI codes developed in MATLAB herein FWISIMAT (Full Waveform Inversion in Seismic Imaging using MATLAB) are successfully implemented using the Marmousi velocity model as the true model. An initial model is obtained by smoothing the true model to initiate FWI procedure. Smoothing ensures an adequate starting model for FWI, as the FWI procedure is known to be sensitive on the starting model. The final model is compared with the true model to review the number of recovered velocities. FWI codes developed in MATLAB herein FWISIMAT (Full Waveform Inversion in Seismic Imaging using MATLAB) are successfully implemented usingMarmousi velocity model astrue model. An initial model is derived from smoothing the true model to initiate FWI procedure. Smoothing ensures an adequate starting model for FWI, as the FWI procedure is known to be sensitive onstarting model. The final model is compared with the true model to review theamount of recovered velocities.

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Liu, Xiaogang, and Yuan Luo. "The Weight Distributions of a Class of Cyclic Codes with Three Nonzeros over𝔽3." Journal of Applied Mathematics 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/686138.

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Cyclic codes have efficient encoding and decoding algorithms. The decoding error probability and the undetected error probability are usually bounded by or given from the weight distributions of the codes. Most researches are about the determination of the weight distributions of cyclic codes with few nonzeros, by using quadratic forms and exponential sums but limited to low moments. In this paper, we focus on the application of higher moments of the exponential sums to determine the weight distributions of a class of ternary cyclic codes with three nonzeros, combining with not only quadratic forms but also MacWilliams’ identities. Another application of this paper is to emphasize the computer algebra system Magma for the investigation of the higher moments. In the end, the result is verified by one example using Matlab.

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Sharma, Anand, and Praneesh Gupta. "Blind Recognition of Parameters of Reed Solomon Code from Intercepted Erroneous Codewords." Defence Science Journal 71, no. 6 (October 22, 2021): 772–76. http://dx.doi.org/10.14429/dsj.71.15047.

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Error correcting codes are designed for reliable transmission of digital information over a noisy channel. Several papers have been published on blind identification of binary FEC codes but papers reported on the identification of non-binary error correcting codes are less. Due to its strong error correction capability, RS (Reed-Solomon) code is being used widely. So technique for blind recognition of RS code is required to analyse intercepted signal as well as for intelligent communication. This paper presents a technique for extraction of parameters of Reed-Solomon code from intercepted demodulated bitstream. The proposed algorithm is very simple and hence it is very practical for hardware implementation. Our approach has been verified using MATLAB simulation.

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Li, Fei, Junyi Zhuang, Jie Zhang, Mo Li, Hao Cai, and Xiaodong Cao. "Reconstruction of uncertain parameters in a multizone model based on contam and bayesian inference." E3S Web of Conferences 356 (2022): 04018. http://dx.doi.org/10.1051/e3sconf/202235604018.

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The prediction of contaminant distribution in multi-zone environment is critical for ensuring indoor personnel health and making an optimistic ventilation strategy. However, the input of uncertainty parameters (flow coefficients, flow exponents, etc.) has a significant impact on the predicted pollutant concentrations. In this study, we proposed a reconstruction method to achieve parameter estimation for the multi-zone model. MATLAB codes was programmed to call CONTAM engine to accomplish pollutant transport simulation in a multi-zone scaled building model. Then a Bayesian inference algorithm compiled in MATLAB codes was applied to determine the unknown parameters iteratively. Finally, multi-zone scaled experiments with different forms of pollutant sources were employed to validate the reconstruction method. The results showed that the predicted concentrations with the reconstructed parameters agreed well with the measured data in the constant source (CS) experiment. While, for the dynamic source (DS) experiment, the predicted concentrations had some discrepancies with the measured data.

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Asadi, Farzin. "Robust Control of DC-DC Converters: The Kharitonov's Theorem Approach with MATLAB® Codes." Synthesis Lectures on Power Electronics 6, no. 2 (August 27, 2018): 1–135. http://dx.doi.org/10.2200/s00868ed1v01y201807pel011.

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Koko, Jonas. "Fast MATLAB assembly of FEM matrices in 2D and 3D using cell-array approach." International Journal of Modeling, Simulation, and Scientific Computing 07, no. 02 (June 2016): 1650010. http://dx.doi.org/10.1142/s1793962316500100.

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We propose a MATLAB implementation of the [Formula: see text] finite element method for the numerical solutions of the Poisson problem and the linear elasticity problem in two-dimensional (2D) and three-dimensional (3D). The code consists of vectorized (and short) assembling functions for the matrices (mass and stiffness) and the right-hand sides. Since for the [Formula: see text] finite element, the element mass matrix and right-hand side are simple, the implementation uses only the MATLAB function sparse on the elements volume. For the stiffness matrix, to obtain a MATLAB implementation close to the standard form, cell-arrays are used to store the gradients of the element basis functions. The assembling procedure can then use matrix/vector products on small size cell-arrays. Numerical experiments show that our implementation is fast, scalable with respect to time, and outperforms existing vectorized MATLAB FEM codes.

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Wang, Xiao Lei, Tai Yuan Yin, Jin Tao Chen, Jian Xun Liang, and Yang Li. "Rapid Design of DC Motor Speed Control System Based on MATLAB." Applied Mechanics and Materials 743 (March 2015): 168–71. http://dx.doi.org/10.4028/www.scientific.net/amm.743.168.

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DC motor speed control system is a typical closed-loop control system ofelectromechanical control subject. This paper presents a fast and efficient developing method ofcontrol system based on MATLAB, overcoming the shortcomings of the low efficiency and longdesign cycle in the traditional control system, and completing the rapid design of DC motor speedcontrol system, with its whole process based on MATLAB through the combination and applicationof the multiple toolboxes of the MATLAB. It applies the System Identification toolbox ofMATLAB to model the DC motor, the Simulink toolbox to simulate the control system, SimulinkDesign Optimization toolbox to optimize the PID parameters automatically, and the RTWtechnology to generate the codes for the DSP target board. Compared with the traditional designmethod, this method is characterized by high-efficiency, high-speed, and easy adjustment, havingcertain significance to the design of other control systems.

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Su, Deliang, Anan Zhou, Zilin Zhou, and Wei Chen. "Optimized Design and Analysis of Offshore Beidou Maritime Foundation Reinforcement System Pseudolite Ranging-Codes." Polish Maritime Research 24, s2 (August 28, 2017): 45–52. http://dx.doi.org/10.1515/pomr-2017-0063.

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Abstract Under the bad sea conditions and weak Beidou navigation signal environment, it is difficult to locate the ship on the sea, and the Beidou navigation system can’t work well. Beidou pseudolite system can improve the performance of Beidou navigation system as a navigation signal transmitter fixed on the ground, the signal of which can improve satellite positioning constellation structure, and improve the system availability reliability and precision. In order to ensure the interoperability and non-correlation of the Beidou pseudolite and the Beidou navigation system, the pseudolite ranging-codes should be selected in the same code space of the satellite ranging-codes and the residual pseudo random code generated by the 2 taps design scheme does not satisfy the performance requirements of the ranging-codes. To solve this issue, a combined design scheme with 3 taps is proposed, and 12 kinds of pseudolite ranging-codes are optimally selected according to the optimum design parameters of ranging-codes. The waveform and correlation of the selected pseudolite ranging-codes are analyzed by MATLAB, the acquisition simulation is carried out by using the new pseudolite ranging-codes. The experimental results show that the new 3-taps based ranging codes design scheme behaves a good balance, correlation and spectral characteristics.

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Spilka, R., and T. Ostermann. "Automatisierte VHDL-Code-Generierung eines Delta-Sigma Modulators." Advances in Radio Science 4 (September 6, 2006): 319–22. http://dx.doi.org/10.5194/ars-4-319-2006.

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Abstract. Im vorliegenden Beitrag wird eine automatische Generierung des VHDL-Codes eines Delta-Sigma Modulators präsentiert. Die Koeffizientenmultiplikation wird hierbei durch Bit-Serielle-Addition durchgeführt. Mit Hilfe zweier neuer Matlab Funktionen wird der Systementwurf durch die bekannte Delta-Sigma Toolbox von R. Schreier erweitert und direkt synthesefähiger VHDL Code erzeugt.

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Song, Chuan Xue, Si Lun Peng, Li Qiang Jin, Jian Hua Li, Shi Xin Song, and Zhu'an Zheng. "Rapid Prototyping Design for In-Wheel Motor Controller." Applied Mechanics and Materials 397-400 (September 2013): 1204–8. http://dx.doi.org/10.4028/www.scientific.net/amm.397-400.1204.

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Based on the study of the Matlab rapid prototyping technology, the rapid prototyping design approach is presented, which is widely applicable to all kinds of microcontroller. Through the modification of the system target file, the automatic code generation function of the Matlab could support more microcontrollers. The rapid prototyping of in-wheel motor controller is designed through this approach. Then the embedded C codes are generated according to the vector control algorithm model which is validated by simulation, and the rapid prototyping of in-wheel motor controller is achieved. The proposed approach is validated through the comparison to hand-written code.

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Zhao, Min, and Jin Di. "Fatigue Load for Cable-Girder Anchorage Structure of Highway and Light-Railway Cable Stayed Bridge." Advanced Materials Research 838-841 (November 2013): 1028–33. http://dx.doi.org/10.4028/www.scientific.net/amr.838-841.1028.

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Because fatigue load of bridge structure under the highway and light-railway loads has not been specified in current design codes, it is necessary to study the fatigue load of cable-girder anchorage structure of the highway and light-railway cable stayed bridge. Take Chongqin Hongyan Jialing River bridge as the subject of investigation, the fatigue load of cable-girder anchorage structure is computed through MatLab program developed by Monte Carlo method and the rain flow method. According to the traffic flow surveys on the load spectrum, the fatigue load of cable-girder anchorage structure was calculated accurately by the MatLab program. Through comparison with the calculation results of the MatLab program, a fatigue load calculation method used equivalent fatigue vehicle based on the Palmgren-Miner linear cumulative damage theory is reliable and accurate.

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Sowa, Marcin. "NUMERICAL COMPUTATIONS OF THE FRACTIONAL DERIVATIVE IN IVPS, EXAMPLES IN MATLAB AND MATHEMATICA." Informatics Control Measurement in Economy and Environment Protection 7, no. 3 (September 30, 2017): 19–22. http://dx.doi.org/10.5604/01.3001.0010.5208.

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The paper concerns a numerical method that deals with the computations of the fractional derivative in Caputo and Riemann-Liouville definitions. The method can be applied in time stepping processes of initial value problems. The name of the method is SubIval, which is an acronym of its previous name – the subinterval-based method. Its application in solving systems of fractional order state equations is presented. The method has been implemented into an ActiveX DLL. Exemplary MATLAB and Mathematica codes are given, which provide guidance on how the DLL can be used.

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Zamora, Blas, Antonio S. Kaiser, and Pedro G. Vicente. "Improvement in Learning on Fluid Mechanics and Heat Transfer Courses Using Computational Fluid Dynamics." International Journal of Mechanical Engineering Education 38, no. 2 (April 2010): 147–66. http://dx.doi.org/10.7227/ijmee.38.2.6.

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This paper is concerned with the teaching of fluid mechanics and heat transfer on courses for the industrial engineer degree at the Polytechnic University of Cartagena (Spain). In order to improve the engineering education, a pedagogical method that involves project-based learning, using computational fluid dynamics (CFD), was applied. The project-based learning works well for mechanical engineering education, since it prepares students for their later professional training. The courses combined applied and advanced concepts of fluid mechanics with the basic numerical aspects of CFD, including validation of the results obtained. In this approach, the physical understanding of practical problems of fluid mechanics and heat transfer played an important role. Satisfactory numerical results were obtained by using both Phoenics and Fluent finite-volume codes. Some cases were solved using the well known Matlab software. Comparisons were made between the results obtained by analytical solutions (if any) with those reached by CFD general-purpose codes and with those obtained by Matlab. This system provides engineering students with a solid comprehension of several aspects of thermal and fluids engineering.

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Chebachev, V. O. "Noisless coding of SAW RFID tags." Issues of radio electronics 49, no. 9 (October 28, 2020): 22–29. http://dx.doi.org/10.21778/2218-5453-2020-9-22-29.

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The article is devoted to SAW RFID systems. The time-position code of the RFID tags is considered. It is proposed to use ReedSolomon codes to increase the noise immunity of the system. The cost of noise immunity is the degradation of information capacity. The coding procedure is optimized for the case when receiving of tag codes is carried out in a correlation way. The procedure for obtaining code using the Matlab is described in detail. The decoding procedure for the RFID tag codes based on the Berlekamp-Massey algorithm is described. Such decoding procedure allows reading codes and correcting decoding errors in real time. A comparative analysis of the probability of a tag code reading error with using and without using the proposed coding in condition of a Gaussian channel for a fixed signal-to-noise ratio. The problem of a more general case of error-correcting coding in SAW RFID systems is viewed.

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Fan, Ya Qin, Xin Zhang, Xin Yu Chen, and Chi Li. "The Research of Malicious Code's Spread and Found Technology." Advanced Materials Research 860-863 (December 2013): 2750–53. http://dx.doi.org/10.4028/www.scientific.net/amr.860-863.2750.

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In order to defense malicious codes increasing serious infestations actively. We proposed several corresponding malicious code found and detection technology on the basis of malware propagation principle. We use MATLAB simulation software to achieve the malware propagation model and detection technology. We proved the practicability of the discovery technology, and present improved methods for the deficiency of the model.

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Akbıyık, Mücahit. "On Powers and Roots of Split Octonions." Journal of Mathematics 2023 (January 25, 2023): 1–25. http://dx.doi.org/10.1155/2023/4500295.

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In this article, we obtain the polar forms for two types of split octonions. We calculate De Moivre’s formulas for all polar forms of split octonions. Thus, we give the n t h − powers and roots of split octonions and the matrix representation of split octonions. In addition, we present an illustrative example with Matlab codes.

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Hillier, Caleb, and Vipin Balyan. "Error Detection and Correction On-Board Nanosatellites Using Hamming Codes." Journal of Electrical and Computer Engineering 2019 (February 10, 2019): 1–15. http://dx.doi.org/10.1155/2019/3905094.

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The field of nanosatellites is constantly evolving and growing at a very fast speed. This creates a growing demand for more advanced and reliable EDAC systems that are capable of protecting all memory aspects of satellites. The Hamming code was identified as a suitable EDAC scheme for the prevention of single event effects on-board a nanosatellite in LEO. In this paper, three variations of Hamming codes are tested both in Matlab and VHDL. The most effective version was Hamming [16, 11, 4]2. This code guarantees single-error correction and double-error detection. All developed Hamming codes are suited for FPGA implementation, for which they are tested thoroughly using simulation software and optimized.

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