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Multilayer Perceptron Model for the prediction of corrosion rate of Aluminium Alloy 5083 in seawater via different training algorithms

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IOP Conference Series: Earth and Environmental Science 2021年第1期646卷

作者： F Zulkifli S Abdullah M J Suriani M I A Kamaludin W B Wan Nik Faculty of Ocean Engineering Technology and Informatics Universiti Malaysia Terengganu 21030 Kuala Nerus Terengganu Malaysia

Corrosion inhibitor is often opted as a corrosion protection method for various industries worldwide. The development of eco-friendly corrosion inhibitor has become a trending concern due to the various environmental regulations impose by several countries. However, a laboratory testing would be such a tedious, costly and time-consuming process. Therefore, artificial neural network (ANN) has been used extensively to predict the verdict based on the experimental values. In this study, 3-layered Multilayer Perceptron (MLP) models were developed with 3 inputs (Electrochemical Impedance Spectroscopy, Ω.cm2), (Potentiodynamic polarization, A/cm2), (weight loss, %), and one output (corrosion rate, ***−1). The data were divided into three parts; 70%, 15%, and 15% for model development, model validation and model testing, respectively. Three training algorithms were tested during the model development, including the Levenberg-Marquadt (LM), Bayesian Regularization (BR), and Scale Conjugate Gradient (SCG). Results revealed that the best MLP models during the development were using neuron number 4 (r = 0.99272), 6 (r = 0.99155), and 2 (r = 0.98624) for LM, BR and SCG, respectively. Among the three training algorithms, LM is opted as the best training algorithm for the corrosion rate prediction which executed high correlation coefficient (R) values during development (R = 0.99272), validation (R = 0.99905), and testing (R = 0.97908). These findings will be an essential tool for the model development with the sole purposes of predicting the corrosion rate in line to ensure the exact time for repair and maintenance schedule.

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On some logical relation properties for rough neutrosophic set

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Journal of Physics: Conference Series 2021年第1期1878卷

作者： S A Mohd Zainal A T Ab Ghani L Abdullah Faculty of Ocean Engineering Technology and Informatics Universiti Malaysia Terengganu 21030 Kuala Nerus Terengganu Malaysia

In this paper, we mainly investigate the relation theory and topological structures of rough neutrosophic sets which constructed by combining rough sets and neutrosophic sets. Firstly, we introduce the concept of algebra which is operations and identity relation. Then, discuss the properties of inverse, reflexive, symmetric as well as transitive relation of rough neutrosophic set. Further, regular sets form a Boolean algebra is introduced from the interior and closure of interior in rough neutrosophic sets. The results establish can help to gain more insight in rough neutrosophic sets.

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Optimal Strategy Synthesis for Stochastic Boolean Games

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Journal of Physics: Conference Series 2021年第1期1988卷

作者： Ahmad Termimi Ab Ghani Kojiro Higuchi Faculty of Ocean Engineering Technology and Informatics Universiti Malaysia Terengganu 21030 Malaysia & College of Engineering Nihon University Japan

In this study, we regard a classification of winning strategy and payoff function over infinite plays. The central goal is to examine the values of the game and then to determine the existence of optimal (∈-optimal) strategy. Furthermore, we are interested in the subject of what sort of optimal (∈-optimal) strategy exists. We first review on generalised reachability games and then we introduce a new game, called Boolean games and concentrate on games with a Boolean combination of the reachability games. The primary contribution is on the existence of ∈-optimal finite memory strategy of each player for any ∈ > 0. We also prove every player has no ∈-optimal memoryless strategy for some Boolean game.

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Security Issues and Threats Facing the Electronic Enterprise Leadership

Security Issues and Threats Facing the Electronic Enterprise...

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International Conference on informatics, Multimedia, Cyber and Information System (ICIMCIS)

作者： Yousef A. Baker El-Ebiary Seita Almandeel Waheed Ali H. M. Ghanem Waheeb Abu-Ulbeh Maged M. Mahyoub Al-Dubai Samer Bamansoor Faculty of Informatics and Computing UniSZA Terengganu Malaysia Faculty of Economics and Administration King Abdulaziz University Jeddah Saudi Arabia Faculty of Ocean Engineering Technology and Informatics Universiti Malaysia Terengganu Malaysia Amman Arab University Amman Jordan Management Development Institute of Singapore Tashkent Uzbekistan Faculty of Computer and Information Technology MEDIU Kuala Lumpur Malaysia

ISBN: (数字)9781728191676

ISBN: (纸本)9781728191683

The explosion if e.-commerce businesses have seen the growth if number if the online businesses worldwide. Consumers nowadays are opted with inline business commerce which is inconsiderably inconvenience compared to traditional transactions. Deniably, e.-commerce enterprises offer more benefits, comparing to “bricks-andmortal” traditional enterprises, but not to be missed the issues and challenges faced by the e-commerce enterprises. This study highlighted the issues and challenges of e-commerce and a set of proposed solutions to those issues and challenges. Among the issues are trust, readiness and security. For each of the issues and challenges, proposed solutions are presented.

关键词： Computers Leadership Multimedia systems Internet security Loss measurement Computer crime Business

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Hydrodynamic Properties of a Moored Floating Breakwater using CFD Approach

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IOP Conference Series: Earth and Environmental Science 2021年第1期698卷

作者： S.F. Abdullah A. Fitriadhy M.H. Mohd M.A.A. Rahman Suntoyo A. Kurniawan W. Pratikto Program of Maritime Technology Faculty Ocean Engineering Technology and Informatics Universiti Malaysia Terengganu Malaysia. Department of Ocean Engineering Faculty of Marine Technology Institut Teknologi Sepuluh Nopember (ITS) Surabaya Indonesia. Program of Ocean Engineering Faculty of Civil and Environmental Engineering Institut Teknologi Bandung Indonesia

In presence of complex-hydrodynamic interaction between water wave and moving structure, a reliable method that can analyse nonlinear phenomena is necessarily required. This paper presents numerical investigation of a moored floating breakwater using computational fluid dynamic (CFD) approach. The mathematical model is based on the extended Reynolds Average Navier-Stokes (RANS) solver for solid-porous obstacle. A high amplitude wave with several wave periods were deliberately considered in the simulation to allow nonlinear wave effects on the floating structure such as wave breaking, overtopping, including viscous friction. Here, the two fluid calculation method for interface boundary between water and air is proposed to capture the complex free surface changes. In addition, the fractional average volume obstacle representation (FAVOR) using partial cell treatment method is employed to simulate the motion of breakwater boundary on the free surface. Approximations and validations on the hydrodynamic properties of the structure have been carried out which include wave transmission coefficient, sway, heave, pitch, and mooring forces. The results show that the CFD model can fairly simulate well on hydrodynamics of the floating breakwater. The discrepancies between numerical and experimental data can be partly attributed to the nonlinearity in the incident wave definition.

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Optimization of soaking time for graphitization of oil palm trunk waste

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AIP Conference Proceedings 2023年第1期2544卷

作者： N. A. Karim Muhammad M. Ramli C. M. R. Ghazali H. S. S. A. Syed R. M. S. Syah Center of Excellence Geopolymer and Green Technology Universiti Malaysia Perlis (UniMAP) P.O. Box 77 D/A Pejabat Pos Besar 01000 Kangar Perlis Malaysia Faculty of Mechanical Engineering Technology Universiti Malaysia Perlis Kampus Tetap Pauh Putra 02600 Arau Perlis Malaysia Faculty of Electronic Engineering Technology Universiti Malaysia Perlis Pauh Putra Campus 02600 Arau Perlis Malaysia Faculty of Ocean Engineering Technology and Informatics Universiti Malaysia Terengganu 21030 Kuala Nerus Terengganu Malaysia

Synthetic graphite was synthesized from oil palm trunk chip in controlled heating condition or pyrolysis process. The soaking time was varied in the range of 2.5 hours, 3 hours, and 3.5 hours. While the heating rate and heating temperature was constant at 20 °/min and 500°C accordingly. After heat treatment process, the samples were characterized by X-Ray Diffraction (XRD) and analyzed using X'Pert Highscore Plus software. Synthetic graphite phase was analyzed by XRD and it was further supported by Fourier Transform Infrared (FTIR) Spectroscopy analysis to verify existence of functional group. The morphological study was carried out by using Scanning Electron Microscope (SEM). Based on the analysis, it was confirmed that synthetic graphite was successfully synthesized at 3hours soaking time with 500 °C and 20 °/min heating rate. Synthetic graphite was observed in the form of amorphous carbon based on the XRD diffraction pattern that match with the reference code of 00-041-1487.

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Numerical analysis of feed-forward network of the Saint-Venant equation for water resources management

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AIP Conference Proceedings 2023年第1期2484卷

作者： I. Abdullah Sh. Juraev R. Aloev 1Faculty of Ocean Engineering Technology and Informatics Universiti Malaysia Terengganu 21030 Kuala Nerus Terengganu Malaysia. 2Department of Computational Mathematics and Information Systems National University of Uzbekistan Uzbekistan Almazar 4 Tashkent Uzbekistan.

This study is devoted to analyse numerically the Saint-Venant equation. This equation is well known for solving water management problems as in assessment of water reserves using a Feed-forward network, and function management of the river system. All these phenomena are related to the unsteady flow of water in the system of rivers and canals, the flow of which is most often described by the hypothetical equation of Saint-Venant. One of the three-layer, feed-forward network framework, namely back-propagation network (BPN) is employed to represent the water resources management of Ugam river. The calculation is obtained for the motion of a river along the x-axis by using Python programming language.

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Lyapunov stability of the numerical solution of the Saint-Venant equation

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AIP Conference Proceedings 2023年第1期2484卷

作者： R. Aloev I. Abdullah A. Akbarova S. H. Juraev 1Department of Computational Mathematics and Information Systems National University of Uzbekistan Uzbekistan Almazar 4 Tashkent Uzbekistan. 2Faculty of Ocean Engineering Technology and Informatics University Malaysia Terengganu 21030 Kuala Nerus Terengganu Malaysia.

The work is devoted to the study of the stability of the finite difference method for the initial-boundary value problem for the system of Saint-Venant equations. Easily the verifiable practical stability conditions have been obtained. Energy estimates are established for an approximate solution of a discrete initial-boundary value problem. This energy estimate allows us to assert the stability of the finite difference method. The corresponding stability theorem is proved. The discrete Lyapunov function is constructed. An a priori estimate is obtained for the numerical solution of the boundary-value difference problem. This estimate allows us to speak about the exponential stability of the numerical solution.

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Erosion and Sedimentation at Headwater Stream: A Case Study for Pergau Water Intake 2

Erosion and Sedimentation at Headwater Stream: A Case Study ...

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2nd International Conference on Tropical Resources and Sustainable Sciences, CTReSS 2020

作者： Sulaiman, Mohd Sofiyan Mohd Amin, Mohamad Faiz Yusoff, Abdul Hafidz Samsudin, Mohd Fikri Shukor, Aisah Md Faculty of Ocean Engineering Technology and Informatics Universiti Malaysia Terengganu Kuala Nerus. Terengganu21030 Malaysia Faculty of Earth Science Universiti Malaysia Kelantan Jeli Campus Locked Bag No. 100 Kelantan Jeli17600 Malaysia Advanced Materials Research Cluster Faculty of Bioengineering and Technology Universiti Malaysia Kelantan Jeli Campus Locked Bag No. 100 Kelantan Jeli17600 Malaysia Tnb Research Sdn. Bhd. No 1 Lorong Ayer Hitam Kawasan Institusi Penyelidikan Selangor Kajang43000 Malaysia

Headwater stream can be defined as colluvial and fluvial system located at mountainous areas where stream order of less than four is recorded from the source to the outlet point of interest. This river system is crucial not only for impounding activities but high kinetic energy at highland areas able to entrain and transport large amount of sediment particles from upstream to the downstream river reach. Due to strategic location for water intake facilities, a study was carried out to determine the extent of erosion and sedimentation process at Pergau water intakes that conveyed water into Pergau Lake. Three specific aims were formulated: Soil loss determination at catchment scale, sediment load determination at reach scale and river bank stability and toe erosion near the intake facility. A desktop study using remote sensing and GIS tools was executed to determine the extent of soil loss at catchment scale. The sediment load and river bank stability were measured in the field using wading technique. It was concluded that all seven TNB water intake are having low soil loss rate ( © Published under licence by IOP Publishing Ltd.

关键词： Rivers

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The need for qualitative theory of ordinary differential equations: A review

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AIP Conference Proceedings 2021年第1期2365卷

作者： Auni Aslah Mat Daud Faculty of Ocean Engineering Technology and Informatics Universiti Malaysia Terengganu (UMT) 21030 Kuala Nerus Terengganu Malaysia

This note discusses the definition, the history and the importance of the qualitative theory of ordinary differential equations (ODE). Although such discussions can be found in many textbooks and online lecture notes, some of the information provided are distinct and some are repeated. This article takes the union of the information and fills in the missing details by providing suitable examples from other references. The qualitative theory of ODEs are essential to complement the analytical and numerical methods. It is also required to prove qualitative properties of a dynamical system. Qualitative analysis of ODEs is also needed when exact solution, even if it can be found, is difficult to interpret or visualise. Furthermore, in some applications, only qualitative properties of the system are of interest. The qualitative methods also will provide information on the sensitivity of the system under study to perturbations of change of initial conditions and of various parameters.

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