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Contrast Correction Using Hybrid Statistical Enhancement on Weld Defect Images

Computers, Materials & Continua 2022年第6期71卷 5327-5342页

作者： Wan Azani Mustafa Haniza Yazid Ahmed Alkhayyat Mohd Aminudin Jamlos hasliza arahim Midhat Nabil Salimi Advanced Computing(AdvCOMP) Centre of ExcellenceUniversiti Malaysia Perlis(UniMAP)Pauh Putra CampusArau02600PerlisMalaysia Faculty of Electrical Engineering Technology Universiti Malaysia Perlis(UniMAP)Pauh Putra CampusArau02600PerlisMalaysia Faculty of Electronic Engineering Technology Universiti Malaysia Perlis(UniMAP)Pauh Putra CampusArau02600PerlisMalaysia Faculty of Engineering the Islamic University54001NajafIraq Faculty of Chemical Engineering Technology Universiti Malaysia Perlis(UniMAP)Arau02600PerlisMalaysia

Luminosity and contrast variation problems are among the most challenging tasks in the image processing field,significantly improving image *** is implemented by adjusting the dark or bright intensity to improve the quality of the images and increase the segmentation ***,numerous methods had been proposed to normalise the luminosity and contrast variation.A new approach based on a direct technique using statistical data known as Hybrid Statistical Enhancement(HSE)is presented in this *** method uses themean and standard deviation of a local and global neighbourhood and classified the pixel into three groups;the foreground,border,and problematic region(contrast&luminosity).The datasets,namely weld defect images,were utilised to demonstrate the effectiveness of the HSE *** results from the visual and objective aspects showed that the HSE method could normalise the luminosity and enhance the contrast variation problem *** proposed method was compared to the two(2)populor enhancement methods which is Homomorphic Filter(HF)and Difference of Gaussian(DoG).To prove the HSE effectiveness,a few image quality assessments were presented,and the results were *** HSE method achieved a better result compared to the other methods,which are Signal Noise Ratio(8.920),Standard Deviation(18.588)and Absolute Mean Brightness Error(9.356).In conclusion,implementing the HSE method has produced an effective and efficient result for background correction and quality images improvement.

关键词： Contrast enhancement image statistic weld defect

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Development of CaO From Natural Calcite as a Heterogeneous Base Catalyst in the Formation of Biodiesel:Review

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Journal of Renewable Materials 2019年第10期7卷 915-939页

作者： Nuni Widiarti Yatim Lailun Ni’mah hasliza Bahruji Didik Prasetyoko Department of Chemistry Faculty of SciencesInstitute Technology Sepuluh Nopember Surabaya 60111Indonesia Jl.Arief Rahman HakimSukoliloSurabaya 60111Indonesia Center of Advanced Materials and Energy Science Universiti Brunei DarussalamNegara Brunei Darussalam.

Biodiesel is a fossil fuel that is in demand to be developed because it is bio-renewable,biodegradable and environmentally *** produced from the transesterification reaction of vege *** using a base *** is the most developed catalyst for the reaction of transesterification of oil into biodiesel because it is cheap,the process is easy and has a high level of *** is a cheap catalyst because it is easily obtained from natural *** use of CaO catalysts in the reaction formation of biodiesel continues to develop through modification with various porous materials and different oxide *** this paper,we discuss the development of CaO,the modification of CaO with a porous material and metal oxide,the mechanism of reaction of CaO and the kinetics of reactions that occur in the reaction transesterification of oil to biodiesel.

关键词： Biodiesel CaO modification transesterification

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Effect of Direct Statistical Contrast Enhancement Technique on Document Image Binarization

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Computers, Materials & Continua 2022年第2期70卷 3549-3564页

作者： Wan Azani Mustafa Haniza Yazid Ahmed Alkhayyat Mohd Aminudin Jamlos hasliza A.Rahim Advanced Computing(AdvCOMP) Centre of ExcellenceUniversiti Malaysia Perlis(UniMAP)Pauh Putra CampusArau02600PerlisMalaysia Faculty of Electrical Engineering Technology Universiti Malaysia Perlis(UniMAP)Pauh Putra CampusArau02600PerlisMalaysia Faculty of Electronic Engineering Technology Universiti Malaysia Perlis(UniMAP)Pauh Putra CampusArau02600PerlisMalaysia Faculty of Engineering The Islamic UniversityNajaf54001Iraq

Background:Contrast enhancement plays an important role in the image processing *** correction has performed an adjustment on the darkness or brightness of the input image and increases the quality of the ***:This paper proposed a novel method based on statistical data from the local mean and local standard ***:The proposed method modifies the mean and standard deviation of a neighbourhood at each pixel and divides it into three categories:background,foreground,and problematic(contrast&luminosity)*** results from both visual and objective aspects show that the proposed method can normalize the contrast variation problem effectively compared to Histogram Equalization(HE),Difference of Gaussian(DoG),and Butterworth Homomorphic Filtering(BHF).Seven(7)types of binarization methods were tested on the corrected image and produced a positive and impressive ***:Finally,a comparison in terms of Signal Noise Ratio(SNR),Misclassification Error(ME),F-measure,Peak Signal Noise Ratio(PSNR),Misclassification Penalty Metric(MPM),and Accuracy was *** binarization method shows an incremented result after applying it onto the corrected image compared to the original *** SNR result of our proposed image is 9.350 higher than the three(3)other *** average increment after five(5)types of evaluation are:(Otsu=41.64%,Local Adaptive=7.05%,Niblack=30.28%,Bernsen=25%,Bradley=3.54%,Nick=1.59%,Gradient-Based=14.6%).Conclusion:The results presented in this paper effectively solve the contrast problem and finally produce better quality images.

关键词： Binarization contrast luminosity illumination document image

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Decagonal C-Shaped CSRR Textile-Based Metamaterial for Microwave Applications

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Computers, Materials & Continua 2022年第4期71卷 1677-1693页

作者： Kabir Hossain Thennarasan Sabapathy Muzammil Jusoh Ping Jack Soh Samir Salem Al-Bawri Mohamed Nasrun Osman hasliza A.Rahim Danai Torrungrueng Prayoot Akkaraekthalin Advanced Communication Engineering(ACE)Centre of Excellence Universiti Malaysia Perlis(UniMAP)Jalan TigaPengkalan Jaya Business CentreKangar01000Malaysia Faculty of Electronic Engineering Technology Universiti Malaysia Perlis(UniMAP)Kampus Alam UniMAP Pauh PutraArau02600Malaysia Centre for Wireless Communications(CWC) University of Oulu90014Finland Space Science Centre Climate Change InstituteUniversiti Kebangsaan MalaysiaBangi43600Malaysia Department of Teacher Training in Electrical Engineering Faculty of Technical EducationKing Mongkut’s University of Technology North Bangkok(KMUTNB)WongsawangBangsue10800Thailand Department of Electrical and Computer Engineering Faculty of EngineeringKing Mongkut’s University of Technology North Bangkok(KMUTNB)WongsawangBangsue10800Thailand

This paper introduces a decagonal C-shaped complementary splitring resonator(CSRR)textile-based metamaterial(MTM).The overall size of the proposed sub-wavelength MTM unit cell is 0.28λ0×0.255λ0 at 3 *** stopband behaviour was first studied prior analysing the negative index properties of the proposed *** is worth noting that in this work a unique way the experiments were *** both simulations and measurements,the proposed MTM exhibited negative-permittivity and negative-refractive index characteristics with an average bandwidth of more than 3 GHz(considering 1.7 to 8.2 GHz as the measurements were carried out within this range).In simulations,the MTM exhibited negative-permittivity properties within the range of 1.7 to 7.52 GHz and 7.96 to 8.2 GHz;and negative-refractive index from 1.7 to 2.23 GHz and 2.33 to 5.09 GHz and 5.63 to 7.45 *** measured from 1.7 to 8.2 GHz,negative-permittivity and negative-refractive index characteristics are exhibited throughout an average bandwidth of more than 3 ***,the transmission coefficient attained in simulations and measurements indicated about 3 GHz of bandwidth,from 1.7 to 3.88 GHz and from 6.68 to 7.4 *** satisfactory agreement between simulations and experiments indicates the potential of the proposed MTM for microwave applications.

关键词： Metamaterial textile metamaterial bioelectromagnetics metasurface antennas

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Impact of electromagnetic radiation exposure during pregnancy on embryonic skeletal development in rats

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Asian pacific Journal of Reproduction 2017年第3期6卷 104-111页

作者： Ali SAEEDHAlchalabi Erkihun Aklilu Abd Rahman Aziz hasliza Rahim Suzanna HRonald Mohd FMalek Mohd Azam Khan Faculty of Veterinary Medicine UMK City CampusPengkalan ChepaLocked Bag3616100Kota BharuKelantanMalaysia Veterinary Medicine College Mosul UniversityMosulIraq School of Electrical System Engineering University Malaysia Perlis(UniMAP)Pauh Putra02600ArauPerlisMalaysia University of Wollongong DubaiUnited Arab Emirates

Objective:To evaluate the teratogenic effect of mobile phone radiation exposure during pregnancy on embryonic skeletal development at the common used mobile phone frequency in our ***:Sixty female Sprague-Dawley rats were distributed into three experiment groups;control and two exposed groups (1 h/day, 2 h/day exposure groups) (n=20/ each group) and exposed to whole body radiation during gestation period from day 1- day 20. Electromagnetic radiofrequency signal generator was used to generate 1800 MHz GSM-like signals at specific absorption rate value 0.974 W/kg. Animals were exposed during experiment in an especial designed Plexiglas box (60 cm× 40 cm× 30 cm). At the end of exposure duration at day 20 of pregnancy animals were sacrificed and foetuses were removed, washed with normal saline and processed to Alizarin red and Alcian blue stain. Skeleton specimens were examined under a stereo microscope and skeleton's snaps were being carefully captured by built in camera fixed on the stereo ***:Intrauterine exposure to electromagneticradiation lead to variation in degree of ossification, mineralization, formation of certain parts of the skeleton majorly in head and lesser in other parts. Deformity and absence of formation of certain bones in the head, ribs, and coccygeal vertebrae were recorded in skeleton of foetuses from exposed dams compare to control ***:The electromagnetic radiation exposure during pregnancy alter the processes of bone mineralization and the intensity of bone turnover processes, and thus impact embryonic skeleton formation and development directly.

关键词： GSM electromagnetic radiation Embryonic development Bone turnover processes Pregnant rats

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Triple-Band Circularly Polarized Dielectric Resonator Antenna (DRA) for Wireless Applications

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Computers, Materials & Continua 2023年第1期74卷 313-325页

作者： Azuwa Ali Mohd Najib Mohd Yasin Ismahayati Adam Ali H.Rambe Mohd Haizal Jamaludin hasliza A Rahim Corhan Cengiz Mohd Ibrahim Shapiai Abd.Razak Advanced Communication Engineering(ACE)Centre of Excellence Faculty Technology of Electrical EngineeringUniversiti Malaysia PerlisPauhPerlis02600Malaysia Advanced Communication Engineering(ACE)Centre of Excellence Faculty Technology of Electronic EngineeringUniversiti Malaysia PerlisPauhPerlis02600Malaysia Department of Electrical Engineering Universitas Sumatera UtaraMedan20155Indonesia Wireless Communication Center Universiti Teknologi MalaysiaSkudai81310JohorMalaysia Korhan Cengiz College of Information Technology University of FujairahFujairah00000United Arab Emirates Malaysia-Japan International Institute of Technology(M-JIIT) Universiti Teknologi MalaysiaKuala Lumpur54100Malaysia

This paper proposes a new dielectric resonator antenna(DRA)design that can generate circularly polarized(CP)triple-band *** CP DRA antenna fed by a probe feed system is achieved with metal strips structure on side of DRA *** design start with conventional rectangular DRA with F shaped metal strips on DRA structure alongside the ***,the F metal strip is enhanced by extending the length of the metal strip to obtain wider impedance *** improvement on the antenna performance is observed by improvised the conventional DRA *** method of removing part of DRA bottom resulted to higher antenna gain with triple band *** primary features of the proposed DRA include wide impedance matching bandwidth(BW)and broadband circular polarization(CP).The primary features of the proposedDRAinclude wide impedance matching bandwidth(BW)and broadband circular polarization(CP).The CP BW values recorded by the proposed antenna were∼11.27%(3.3–3.65 GHz),12.18%(4.17–4.69 GHz),and 1.74%(6.44–6.55 GHz)for impedance-matching BW values of 35.4%(3.3–4.69 GHz),1.74%(5.36–5.44 GHz),and 1.85%(6.41–6.55 GHz)with peak gains of 6.8 dBic,7.6 dBic,and 8.5 dBic,respectively,in the lower,central,and upper *** prototype of the proposed antenna geometry was fabricated and measured.A good agreement was noted between the simulated and the measured results.

关键词： Dielectric resonator antenna(DRA) circularly polarized(CP) parasitic element radiating element

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Reconfigurable Pattern Patch Antenna for Mid-Band 5G:A Review

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Computers, Materials & Continua 2022年第2期70卷 2699-2725页

作者： Siti Rahena Isa Muzammil Jusoh Thennarasan Sabapathy Jamel Nebhen Muhammad Ramlee Kamarudin Mohamed Nasrun Osman Qammer Hussain Abbasi hasliza A.Rahim Mohd Najib Mohd Yasin Ping Jack Soh Department of Electrical Engineering Politeknik Sultan Abdul Halim Mu’adzam ShahJitra06000Malaysia Advanced Communication Engineering(ACE) Centre of ExcellenceUniversiti Malaysia Perlis.Faculty of Electronic Engineering TechnologyUniversiti Malaysia PerlisPauh Putra02600Malaysia College of Computer Engineering and Sciences Prince Sattam Bin Abdulaziz UniversityP.O.Box 151Alkharj11942Saudi Arabia Faculty of Electrical and Electronic Engineering Universiti Tun Hussein Onn MalaysiaParit Raja86400Malaysia School of Engineering University of GlasgowGlasgowG128QQU.K

New requirements in communication technologies make it imperative to rehash conventional features such as reconfigurable antennas to adapt with the future adaptability *** paper presents a comprehensive review of reconfigurable antennas,specifically in terms of radiation patterns for adaptation in the upcoming Fifth Generation(5G)New Radio frequency *** represent the key of antenna technology for materializing a high rate transmission,increased spectral and energy efficiency,reduced interference,and improved the beam steering and beam shaping,thereby land a great promise for planar antennas to boost the mid-band *** review begins with an overview of the underlying principals in reconfiguring radiation patterns,followed by the presentations of the implemented innovative antenna topologies to suit particular advanced *** various adaptation techniques of radiation pattern reconfigurable planar antennas and the understanding of its antenna design approaches has been investigated for its radiation pattern enhancement.A variety of design configurations have also been critically studied for their compatibilities to be operated in the midband communication *** review provides new insights on pattern reconfigurable antenna where such antennas are categorized as beam steering antenna and beamshaping antennas where the operation modes and purposes are clearly *** review also revealed that for mid-band 5G communication,the commonly used electronic switching such as PIN diodes have sufficient isolation loss to provide the required beam performance.

关键词： 5G mid-band pattern antenna reconfigurable antenna phased array antenna antenna and propagation

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A Hybrid Modified Sine Cosine Algorithm Using Inverse Filtering and Clipping Methods for Low Autocorrelation Binary Sequences

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Computers, Materials & Continua 2022年第5期71卷 3533-3556页

作者： Siti Julia Rosli hasliza A Rahim Khairul Najmy Abdul Rani Ruzelita Ngadiran Wan Azani Mustafa Muzammil Jusoh Mohd Najib Mohd Yasin Thennarasan Sabapathy Mohamedfareq Abdulmalek Wan Suryani Firuz Wan Ariffin Ahmed Alkhayyat Advanced Communication Engineering Centre of Excellence(ACE)Universiti Malaysia Perlis(UniMAP)01000 KangarPerlisMalaysia Faculty of Electronic Engineering Technology Universiti Malaysia Perlis(UniMAP)02600 ArauPerlisMalaysia Advanced Computing(AdvCOMP) Centre of ExcellenceUniversiti Malaysia Perlis(UniMAP)02600 ArauPerlisMalaysia Faculty of Electrical Engineering Technology Universiti Malaysia Perlis(UniMAP)02600 ArauPerlisMalaysia Faculty of Engineering and Information Science University of Wollongong in DubaiDubai 20183United Arab Emirates Department of Computer Technical Engineering College of Technical Engineeringthe Islamic University54001 NajafIraq

The essential purpose of radar is to detect a target of interest and provide information concerning the target’s location,motion,size,and other *** knowledge about the pulse trains’properties shows that a class of signals is mainly well suited to digital processing of increasing practical importance.A low autocorrelation binary sequence(LABS)is a complex combinatorial *** main problems of LABS are low Merit Factor(MF)and shorter length ***,the maximum possible MF equals 12.3248 as infinity length is unable to be ***,this study implemented two techniques to propose a new metaheuristic algorithm based on Hybrid Modified Sine Cosine Algorithm with Cuckoo Search Algorithm(HMSCACSA)using Inverse Filtering(IF)and clipping method to achieve better *** proposed algorithms,LABS-IF and HMSCACSA-IF,achieved better results with two large MFs equal to 12.12 and 12.6678 for lengths 231 and 237,respectively,where the optimal solutions belong to the skew-symmetric *** MF outperformed up to 24.335%and 2.708%against the state-of-the-art LABS heuristic algorithm,xLastovka,and Golay,*** results indicated that the proposed algorithm’s simulation had quality solutions in terms of fast convergence curve with better optimal means,and standard deviation.

关键词： Merit factor autocorrelation skew-symmetric sequences combinatorial optimization sine cosine algorithm cuckoo search algorithm radar system wearable antenna antenna and propagation

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