Pertanika Journal of Science and Technology最新文献_第2页

Processing Plants Damage Mechanisms and On-stream Inspection Using Phased Array Corrosion Mapping—A Systematic Review 加工厂的损坏机理和使用相控阵腐蚀测绘法进行水流检测--系统性综述

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Pertanika Journal of Science and Technology Pub Date : 2024-07-25 DOI: 10.47836/pjst.32.4.12

Jan Lean Tai, Mohamed Thariq Hameed Sultan, Farah Syazwani Shahar

引用次数: 0

Single Deformation Occurrence During Testing of Kenaf Composite Through Momentum Trapping Modification on Split Hopkinson Pressure Bar 在分体式霍普金森压力棒上通过动量捕获改性测试 Kenaf 复合材料时发生的单次变形

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Pertanika Journal of Science and Technology Pub Date : 2024-07-25 DOI: 10.47836/pjst.32.4.14

Muhammad Fauzinizam Razali, Sareh Aiman Hilmi Abu Seman, Mohd Syakirin Rusdi, Siti Nuha Majiddah Abdul Aziz

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The Macrobenthos Diversity and Dominance in Johor Straits, Malaysia 马来西亚柔佛海峡大型底栖生物的多样性和优势地位

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Pertanika Journal of Science and Technology Pub Date : 2024-07-22 DOI: 10.47836/pjst.32.4.20

Mohd Sophian Mohd Kasihmuddin, Zaidi Che Cob

{"title":"The Macrobenthos Diversity and Dominance in Johor Straits, Malaysia","authors":"Mohd Sophian Mohd Kasihmuddin, Zaidi Che Cob","doi":"10.47836/pjst.32.4.20","DOIUrl":"https://doi.org/10.47836/pjst.32.4.20","url":null,"abstract":"Johor Strait has received massive anthropogenic traffic in recent years, causing environmental alteration and inevitably harming macrobenthos on the seafloor. A comprehensive assessment was done in several key locations within the strait to identify macrobenthic inhabitants and possible driving factors attributing to differences in macrobenthic assemblages in these areas. Sediments were acquired using Ponar Grab in 13 key locations within the Johor Straits. Seven hundred thirty macrobenthic individuals and 46 known taxa were identified in sediments of 13 locations in the strait. Annelids Prionospio (n=295), Minuspio (n=95) and Mediomastus (n=82) were concentrated in the central zone. Molluscs dominated the Merambong Shoals area (Arcualuta, n=66), and amphipods dominated waters off Santi River (Leucothoe, n=26; Gammarus, n=11; Cymadusa, n=9). PERMANOVA analyses (p<0.05) showed significant differences in benthic taxa composition in all locations overall. BIOENV analyses (r=0.76, p<0.05) highlighted water acidity, chlorophyll-a, silts and total organic carbon as the main influences toward benthic assemblages throughout the study area. PCA graph indicated higher organic carbon and silts in the central area, implying favourable conditions for Sedentarian polychaetes to thrive. The east and west ends of the strait exhibited higher readings of water acidity and chlorophyll-a, which may directly contribute to a higher diversity of benthic communities in the areas. Lower oxygen levels in two locations in the central area (J3=2.97 mg/L, J4: 2.63 mg/L) exhibited Sedentaria polychaete-dominated region, but zero benthic organisms in another part of the central area (J5-J9, 2.97–0.99 mg/L). This study showcased the effectiveness of environmental monitoring using macrobenthos as an indicating subject.","PeriodicalId":46234,"journal":{"name":"Pertanika Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141814734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vision-Based Multi-Stages Lane Detection Algorithm 基于视觉的多阶段车道检测算法

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Pertanika Journal of Science and Technology Pub Date : 2024-07-22 DOI: 10.47836/pjst.32.4.19

Fayez Saeed Faizi, A. K. Al-Sulaifanie

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Electric Transmission Tower Corrosion Assessment Using Analytic Hierarchy Process and Health Index 利用层次分析法和健康指数评估输电塔腐蚀情况

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Pertanika Journal of Science and Technology Pub Date : 2024-07-22 DOI: 10.47836/pjst.32.4.21

Aina Shazwana Mohd Izhar, N. H. Nor Khalid, Fathoni Usman, Mohd Supian Abu Bakar, Nur Fadilah Adriyanshah, Hakim Zahari

{"title":"Electric Transmission Tower Corrosion Assessment Using Analytic Hierarchy Process and Health Index","authors":"Aina Shazwana Mohd Izhar, N. H. Nor Khalid, Fathoni Usman, Mohd Supian Abu Bakar, Nur Fadilah Adriyanshah, Hakim Zahari","doi":"10.47836/pjst.32.4.21","DOIUrl":"https://doi.org/10.47836/pjst.32.4.21","url":null,"abstract":"A transmission tower is one of the components in power infrastructure supporting overhead power lines (OHL). Electrical components, structural, and environmental factors are classified as the primary concern as they can cause catastrophic failure in transmission lines. Transmission towers are in various environments, such as coastal and industrial areas, with different atmospheric corrosion levels due to various corrosive pollutants. For maintenance planning, it is essential to consider the effects of corrosion on towers by physical evaluation influenced by atmospheric corrosion. The physical evaluation of each element uses a scoring or rating method ranging from one to five. The Analytic Hierarchy Process (AHP) and Health Index (HI) are used to evaluate the overall condition of the towers. The study discovered that soil corrosivity in coastal areas is high, and atmospheric corrosion is due to chloride content. Although the pollutants in those areas are high and corrosive, the physical evaluation found that most industrial, coastal, and road towers are in good condition at a rating of 4 and 5. The HI result is the dominance of 71% to 85%, which indicates that the towers are in good health.","PeriodicalId":46234,"journal":{"name":"Pertanika Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141814023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determining Process Variability Using Fuzzy Triangular Distribution in Dynamic Value Stream Mapping 在动态价值流图中使用模糊三角分布确定过程变异性

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Pertanika Journal of Science and Technology Pub Date : 2024-07-22 DOI: 10.47836/pjst.32.4.17

Thulasi Manoharan, Faieza Abdul Aziz, Zulkiffle Leman, Siti Azfanizam Ahmad

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The Importance of Vegetation Landscape in Firefly Habitats 植被景观对萤火虫栖息地的重要性

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Pertanika Journal of Science and Technology Pub Date : 2024-07-22 DOI: 10.47836/pjst.32.4.18

Nurhafizul Abu Seri, Azimah Abd Rahman

引用次数: 0

Optimizing Bagged Trees in an Ensemble Classifier for Improved Prediction of Diabetes Prevalence in Women 优化组合分类器中的袋装树，提高对女性糖尿病患病率的预测能力

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Pertanika Journal of Science and Technology Pub Date : 2024-07-22 DOI: 10.47836/pjst.32.4.16

Jose Candia Jr., Airish Mae Adonis, Jesica Perlas

{"title":"Optimizing Bagged Trees in an Ensemble Classifier for Improved Prediction of Diabetes Prevalence in Women","authors":"Jose Candia Jr., Airish Mae Adonis, Jesica Perlas","doi":"10.47836/pjst.32.4.16","DOIUrl":"https://doi.org/10.47836/pjst.32.4.16","url":null,"abstract":"This study aims to optimize the performance of the bagged tree in an ensemble classifier for predicting diabetes prevalence in women. The study used a dataset of 1,888 women with six features: age, BMI, glucose level, insulin level, blood pressure, and pregnancy status. The dataset was divided into training and testing sets with a 70:30 ratio. The bagged tree ensemble classifier was used for the analysis, and five-fold cross-validation was applied. The study found that using all features during training resulted in a 92.3% training accuracy and a 99.5% testing accuracy. However, applying optimization techniques such as feature selection, parameter tuning, and a maximum number of splits improved model performance. Feature selection optimized the accuracy performance by 0.2%, while parameter tuning improved the test accuracy by 0.2%. Moreover, decreasing the maximum number of splits from 1322 to 800 or 600 resulted in an optimized model with 0.1% higher validation accuracy. Finally, the optimized bagged tree models were evaluated using various performance metrics, including accuracy, precision, recall, and F1 score. The study found that Model 1, which used 800 maximum number of splits and 50 learners, outperformed Model 2 in terms of recall and F1 score, while Model 2, which used 600 maximum number of splits and 50 learners, had a higher precision score. The study concludes that optimization techniques can significantly improve the performance of the bagged tree in predicting diabetes prevalence in women.","PeriodicalId":46234,"journal":{"name":"Pertanika Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141815069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of Fuzzy Analytic Network Process in Selection of Bio-composite Filament for Fused Deposition Modeling Process 模糊分析网络流程在选择熔融沉积模型工艺中的生物复合丝中的应用

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Pertanika Journal of Science and Technology Pub Date : 2024-07-22 DOI: 10.47836/pjst.32.4.15

Hazliza Aida Che Hamid, Mastura Mohammad Taha, S. I. Abdul Kudus, Noryani Muhammad, M. A. Shaharuzaman, Loh Yueh Feng, Ahmad Ilyas Rushdan

{"title":"Application of Fuzzy Analytic Network Process in Selection of Bio-composite Filament for Fused Deposition Modeling Process","authors":"Hazliza Aida Che Hamid, Mastura Mohammad Taha, S. I. Abdul Kudus, Noryani Muhammad, M. A. Shaharuzaman, Loh Yueh Feng, Ahmad Ilyas Rushdan","doi":"10.47836/pjst.32.4.15","DOIUrl":"https://doi.org/10.47836/pjst.32.4.15","url":null,"abstract":"The concurrent engineering approach necessitates integrating material selection into the product design to effectively align with client specifications. Premature product failure, leading to substantial losses, frequently arises as a consequence of inadequate material selection due to conflicting demands. The Multi-Criteria Decision Making (MCDM) procedures are essential for making wise decisions since choosing materials is complicated. This study employs fuzzy analytic network process (FANP) techniques to determine which bio-composite filaments will be the most effective for Fused Deposition Modeling (FDM). The requirements and available factors of egg carton packaging material determine the selection criteria for bio-composite filaments. These factors serve as the foundation for identifying ten essential features. The acquired data showed that the sugar palm fiber/polylactic acid composite (SPF/PLA) 7.5 wt.% fiber loading exhibited the highest priority score, 19.80%. The kenaf/acrylonitrile butadiene styrene (Kenaf/ABS) composite, with a fiber loading of 7.5%, exhibited the lowest ranking, scoring 4.4%. Subsequently, a sensitivity analysis was conducted to further corroborate the findings. It was observed that the SPF/PLA 7.5 wt.% fiber loading consistently ranked highest throughout all four examined scenarios. The study determined that a bio-composite filament material with a weight ratio of 7.5% SPF/PLA fiber loading is the optimal choice for utilizing FDM technology in the design of egg carton packaging.","PeriodicalId":46234,"journal":{"name":"Pertanika Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141816541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel Reactive Power Control Strategy for Mitigating Voltage Rise in the Malaysian Low Voltage Distribution Network with High PV Penetration 用于缓解马来西亚高光伏渗透率低压配电网络电压升高的新型无功功率控制策略

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Pertanika Journal of Science and Technology Pub Date : 2024-07-22 DOI: 10.47836/pjst.32.4.11

Mustafa Abo alwez, J. Jasni, Raghad Wahab, Mohd Amran Mohd.Radzi, N. Azis

{"title":"Novel Reactive Power Control Strategy for Mitigating Voltage Rise in the Malaysian Low Voltage Distribution Network with High PV Penetration","authors":"Mustafa Abo alwez, J. Jasni, Raghad Wahab, Mohd Amran Mohd.Radzi, N. Azis","doi":"10.47836/pjst.32.4.11","DOIUrl":"https://doi.org/10.47836/pjst.32.4.11","url":null,"abstract":"Integrating renewable energy sources and distributed energy resources (DERs) in the Malaysian low voltage distribution network has introduced voltage stability challenges, particularly voltage rises, leading to detrimental impacts on network performance. This paper presents a novel reactive power control strategy for addressing these challenges. Unlike conventional methods with fixed reactive power references, the proposed technique dynamically adjusts the reactive power reference in real time, considering voltage and active power injection. It calculates the rate of change in reactive power reference (ΔQ) per second by analyzing Volt-VAR and Watt-VAR components and updates the reference accordingly. Simulations conducted on a low voltage distribution network in Taman Impian Putra, Malaysia, showcase the adverse effects of high photovoltaic (PV) penetration on voltage stability and highlight the success of the proposed strategy in mitigating voltage rise. The technique effectively reduces average voltage, maintains voltage regulation during high sun irradiance and low load demand periods, and surpasses the adaptability of existing methods dependent on PV active injection or network voltage alone. The proposed strategy ensures accurate control and efficiently addresses dynamic network changes by accounting for both PV active power injection and network voltage. This approach offers enhanced voltage regulation, adaptability to varying network conditions, and reduced losses, making it a promising solution for mitigating voltage rise in the Malaysian low voltage distribution network. The simulations, validated using MATLAB Simulation and OpenDSS, confirm the strategy’s efficacy and potential for real-world implementation.","PeriodicalId":46234,"journal":{"name":"Pertanika Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141816916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0