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Optimization of Design Parameters for Improved Buoy Reliability in Wave Energy Converter Systems 优化设计参数,提高波浪能转换系统中浮标的可靠性
Pub Date : 2024-07-03 DOI: 10.9734/jerr/2024/v26i71213
Mohammad Atiqur Rahman
Wave energy converters are frequently subjected to cyclic fatigue loads, making them prone to structural failure. This study presents a comprehensive design for reliability analysis of buoy structures used in ocean energy converters. A finite element model (FEM) was developed using ABAQUS to evaluate the effects of different materials—linear low-density polyethylene (LLDPE) versus high-density polyethylene (HDPE)—as well as variations in rib spacing and structural thickness under uniform pressure conditions. The analysis considered configurations with 3, 5, and 7 ribs, and wall thicknesses of 0.5, 0.7, and 1 inch. Results indicated that increasing the number of ribs and wall thickness significantly reduces deflection and von Mises stress, enhancing structural stability. HDPE demonstrated superior strength and lower deflection compared to LLDPE, although with reduced ductility. This study provides critical insights into optimizing buoy design parameters to improve the structural performance and durability of wave energy converter buoys, ensuring their reliability and longevity in harsh marine environments.
波浪能转换器经常受到周期性疲劳载荷的影响,容易出现结构故障。本研究介绍了用于海洋能转换器的浮标结构可靠性分析的综合设计。使用 ABAQUS 开发了一个有限元模型(FEM),以评估不同材料--线性低密度聚乙烯(LLDPE)与高密度聚乙烯(HDPE)--的影响,以及均匀压力条件下肋间距和结构厚度的变化。分析考虑了 3、5 和 7 个肋条以及 0.5、0.7 和 1 英寸壁厚的结构。结果表明,增加肋条数量和壁厚可显著降低挠度和 von Mises 应力,增强结构稳定性。与低密度聚乙烯相比,高密度聚乙烯具有更高的强度和更低的挠度,但延展性有所降低。这项研究为优化浮标设计参数,提高波浪能转换浮标的结构性能和耐久性,确保其在恶劣海洋环境中的可靠性和使用寿命提供了重要见解。
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引用次数: 0
The Role of Information Governance in Mitigating Financial Crime Risks in Stablecoin Transactions 信息治理在降低稳定币交易中的金融犯罪风险中的作用
Pub Date : 2024-07-03 DOI: 10.9734/jerr/2024/v26i71212
O. J. Okunleye
This study investigates the role of information governance in mitigating financial crime risks in stablecoin transactions. Using a variety of analytical techniques, including simple linear regression, sentiment analysis with NLP tools, logistic regression, and machine learning models, the research evaluates the impact of information governance on innovation, user trust, financial crimes, and the effectiveness of combined compliance measures. The findings indicate that strict information governance regulations reduce innovation but enhance market stability and user trust. Robust governance correlates strongly with increased user adoption, while higher anonymity features in stablecoins are linked to a higher incidence of financial crimes. Integrating KYC/AML compliance with transaction monitoring significantly improves the detection and prevention of financial crimes compared to standalone approaches. These insights provide valuable guidance for policymakers, regulatory authorities, and financial institutions to develop strategies that balance innovation with enhanced security and compliance in the stablecoin market.
本研究探讨了信息治理在降低稳定币交易中的金融犯罪风险方面的作用。研究使用了多种分析技术,包括简单线性回归、使用 NLP 工具的情感分析、逻辑回归和机器学习模型,评估了信息治理对创新、用户信任、金融犯罪和综合合规措施有效性的影响。研究结果表明,严格的信息治理法规会减少创新,但会增强市场稳定性和用户信任度。健全的治理与用户采用率的提高密切相关,而稳定币较高的匿名性则与较高的金融犯罪率有关。与单独的方法相比,将 "了解你的客户"/"遵守反洗钱法 "与交易监控结合起来,能显著提高金融犯罪的发现和预防能力。这些见解为政策制定者、监管机构和金融机构制定战略提供了宝贵的指导,从而在稳定币市场的创新与增强安全性和合规性之间取得平衡。
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引用次数: 0
Development of a Solar-Powered Robotic Lawn Mower 开发太阳能机器人割草机
Pub Date : 2024-07-02 DOI: 10.9734/jerr/2024/v26i71211
Ajewole, P. O., Koyenikan, O. O.
Lawn keeping has been a major issue in campus environment due to rising cost of diesel fuel and lack of man power to operate both tractor-mounted and motorized lawn mowers. An automated solar-powered robotic lawn mower was developed in this research work to solve this problem. The components of the mower include a frame, three caster wheels, two gear motors which provide the forward motion, a 12v DC cutter motor which rotates the cutting blade, 2202mAH limpo battery for power supply, a 16W solar panel for charging the battery, a charge controller, a Raspberry Pi 3 B+ microcontroller which controls the motors, and a VNC mobile app for setting inputs for control. The mover was locally fabricated at the Agricultural Engineering workshop of The Federal Polytechnic, Ado-Ekiti, and it was tested in an open field. The effective field capacity and field efficiency of the machine were found to be 0.13 m2/s and 88% respectively. The total cost of producing the mower was 185,800 naira. The mower is recommended for large scale production and for usage on campuses.
由于柴油燃料成本上升以及缺乏操作拖拉机和电动割草机的人力,校园环境中的草坪养护一直是个大问题。为解决这一问题,本研究开发了一种自动太阳能机器人割草机。割草机的组成部分包括一个机架、三个脚轮、两个提供前进运动的齿轮电机、一个旋转切割刀片的 12v 直流切割电机、2202mAH Limpo 电池供电、一个 16W 太阳能电池板为电池充电、一个充电控制器、一个控制电机的 Raspberry Pi 3 B+ 微控制器和一个用于设置控制输入的 VNC 移动应用程序。移动装置是在阿多-埃基蒂联邦理工学院的农业工程车间就地制造的,并在一块空地上进行了测试。结果发现,该机器的有效田间能力和田间效率分别为 0.13 平方米/秒和 88%。生产该割草机的总成本为 18.58 万奈拉。建议将该割草机用于大规模生产和校园使用。
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引用次数: 0
Evaluating the Compaction Behavior of Oil-contaminated Soils for Civil Engineering Applications 评估土木工程应用中受石油污染土壤的压实行为
Pub Date : 2024-06-15 DOI: 10.9734/jerr/2024/v26i71198
Aniekan Daniel Udo
This study investigates the impact of oil contamination on the compaction characteristics of soil, specifically lateritic soil samples from Bori Local Government Area in Rivers State, Nigeria. The research focuses on understanding how varying degrees of oil pollution affect soil's compaction behavior, crucial for civil engineering applications. Compaction tests, including the standard Proctor test, were conducted on both uncontaminated and oil-contaminated soil samples. The results indicate that up to 2% oil addition improves compaction, reducing the optimum moisture content and increasing the maximum dry density. Beyond 4% oil content, no significant enhancement in compaction was observed, and higher oil percentages led to saturation and expulsion of oil, based on visual inspection it appears to negatively affect the soil strength. These findings are essential for engineering projects in oil spill regions, providing insights into effective soil compaction strategies and the potential use of oil-contaminated soils in construction.
本研究调查了石油污染对土壤压实特性的影响,特别是尼日利亚河流州博里地方政府辖区的红土土壤样本。研究重点是了解不同程度的石油污染如何影响土壤的压实行为,这对土木工程应用至关重要。对未受污染和受石油污染的土壤样本进行了压实试验,包括标准的 Proctor 试验。结果表明,最高 2% 的油添加量可改善压实效果,降低最佳含水量,提高最大干密度。含油量超过 4% 时,压实效果没有明显改善,含油量越高,油的饱和度和排出量越大,目测似乎会对土壤强度产生负面影响。这些发现对于石油泄漏地区的工程项目至关重要,为有效的土壤压实策略和在建筑中使用石油污染土壤的可能性提供了启示。
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引用次数: 0
Research Progress on Mechanical Properties and Frost Resistance of Rubber Recycled Concrete 橡胶再生混凝土力学性能和抗冻性研究进展
Pub Date : 2024-06-14 DOI: 10.9734/jerr/2024/v26i71197
Li Wang
The use of recycled waste tires and construction and demolition wastes as aggregates in concrete after treatment as required not only contributes to environmental sustainability, but also alleviates the growing demand for natural aggregates in concrete production. This paper focuses on the mechanical properties and frost resistance of rubberized recycled concrete, including the effects of rubber and recycled aggregates on the mechanical properties and frost resistance of concrete, as well as measures to improve the mechanical properties and frost resistance of rubberized recycled concrete. Existing studies show that the mechanical properties of concrete gradually decrease with the increase of rubber and recycled aggregate admixture. Due to the high number of defects in recycled aggregate, it has a negative effect on the frost resistance of concrete. Rubber particles have air-entraining properties and can be incorporated into concrete to enhance the frost resistance of concrete. The frost resistance of rubber recycled concrete can be improved by mixing appropriate amount of fiber, rubber or rubber modification treatment.
将回收的废轮胎和建筑及拆除废料按要求处理后用作混凝土骨料,不仅有助于环境的可持续发展,还能缓解混凝土生产中对天然骨料日益增长的需求。本文主要研究橡胶再生混凝土的力学性能和抗冻性,包括橡胶和再生骨料对混凝土力学性能和抗冻性的影响,以及改善橡胶再生混凝土力学性能和抗冻性的措施。现有研究表明,混凝土的力学性能随着橡胶和再生骨料掺量的增加而逐渐降低。由于再生骨料中的缺陷较多,对混凝土的抗冻性有负面影响。橡胶颗粒具有引气性能,掺入混凝土中可增强混凝土的抗冻性。通过掺入适量的纤维、橡胶或橡胶改性处理剂,可提高橡胶再生混凝土的抗冻性。
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引用次数: 0
Research and Prospect of Intelligent Workshop AGV Path Planning Algorithm 智能车间 AGV 路径规划算法的研究与展望
Pub Date : 2024-06-13 DOI: 10.9734/jerr/2024/v26i71195
Jingran Sun, Yuyin Zhang, Fangjia Fu, Liyan Kang, Junxu Ma
Path planning algorithm is one of the core algorithms for automatic guided vehicle(AGV)to complete the autonomous task of intelligent workshop. The research status of grid method and Viewable method in environment modeling at home and abroad is described. The research results of traditional path search algorithms such as artificial potential field method, Dijstra algorithm and A* algorithm are analyzed and compared with intelligent algorithms such as particle swarm optimization algorithm, ant colony algorithm and genetic algorithm. The analysis finds that in the face of complex workshop environment, multi-factor influence and complex obstacles, some tasks are not completed or work overtime depending on the traditional algorithm. Therefore, starting from the algorithm improvement, in order to improve the operational efficiency and efficient obstacle avoidance of AGV, the fusion of intelligent algorithm and traditional algorithm will become the focus of research. Finally, combined with the existing problems in the current AGV path planning research, the research trend of intelligent development and integrated development is prospected. In future research, improvements in algorithm efficiency and integration with emerging technologies such as artificial intelligence can be considered.
路径规划算法是自动导引车(AGV)完成智能车间自主任务的核心算法之一。介绍了网格法和可视化法在国内外环境建模中的研究现状。分析了人工势场法、Dijstra算法、A*算法等传统路径搜索算法的研究成果,并与粒子群优化算法、蚁群算法、遗传算法等智能算法进行了比较。分析发现,面对复杂的车间环境、多因素影响和复杂的障碍,依靠传统算法,有些任务无法完成或超时工作。因此,从算法改进入手,为了提高 AGV 的运行效率和高效避障,智能算法与传统算法的融合将成为研究的重点。最后,结合当前 AGV 路径规划研究中存在的问题,展望了智能化发展和集成化发展的研究趋势。在未来的研究中,可以考虑算法效率的提升以及与人工智能等新兴技术的融合。
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引用次数: 0
An Evaluation of Environmental Contamination on Public Health: A Review of Air Pollution in Nigeria 评估环境污染对公众健康的影响:尼日利亚空气污染回顾
Pub Date : 2024-06-13 DOI: 10.9734/jerr/2024/v26i71196
O. Ucheje, C. Ikebude
Numerous researchers have recognized environmental contamination as a potential danger to both the ecosystem and the general population's health. However, studies have shown that air pollution is a substantial contributor to a variety of respiratory conditions, including chronic obstructive pulmonary disease (COPD), shortness of breath, respiratory infections, and other similar conditions. To counteract this, however, the formulation and execution of public health policies might be of assistance in the fight against environmental pollution. In this study, the researchers investigated the ways in which air pollution, being a kind of environmental contamination, leads to problems in public health. In light of this, we reviewed the assessment of surveillance and monitoring, the consequences of human exposure to air pollution on public health, the influence of environmental pollution on social behaviors, as well as the ethical and legal implications of environmental contaminations. The study came to the conclusion that it is imperative to initiate possible action, since reducing the amount of air pollutants and chemicals in the environment may assist in avoiding further consequences of environmental degradation as well as limit the amount of harm done to human health. As a result, it is necessary to include monitoring of ambient PM2.5 and other air pollutants over a long length of time at a number of places that are typical of important metropolitan activities. These areas include trash dumps, transportation, and manufacturing facilities.
许多研究人员已经认识到,环境污染对生态系统和普通人的健康都是一种潜在的危险。然而,研究表明,空气污染是导致各种呼吸系统疾病的重要因素,包括慢性阻塞性肺病(COPD)、呼吸急促、呼吸道感染和其他类似疾病。然而,为了应对这一问题,公共卫生政策的制定和执行可能有助于对抗环境污染。在这项研究中,研究人员调查了空气污染作为环境污染的一种,是如何导致公共卫生问题的。有鉴于此,我们回顾了监督和监测的评估、人类暴露于空气污染对公共健康的影响、环境污染对社会行为的影响以及环境污染的伦理和法律意义。研究得出的结论是,当务之急是采取可能的行动,因为减少环境中的空气污染物和化学品的数量可能有助于避免环境退化的进一步后果,并限制对人类健康造成的伤害。因此,有必要在一些典型的大都市重要活动场所长期监测环境 PM2.5 和其他空气污染物。这些区域包括垃圾堆放场、交通和制造设施。
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引用次数: 0
A Review on Sonochemical Treatment of Dye Molecules 染料分子的声化学处理综述
Pub Date : 2024-06-11 DOI: 10.9734/jerr/2024/v26i71192
Md. Shaharul Islam, M. Shamsul Alam, Md. Helal Uddin
The use of ultrasound is a very effective and suitable process for the degradation of harmful dyes. In order to elucidate the degradation mechanism, numerous studies have examined the breakdown of dye molecules in aqueous medium with different additives using ultrasonic irradiation. In this review, the basic principle of sonochemical treatment and the effect of different parameters such as pH, irradiation time, different additives like NaCl, Na2SO4, CCl4, H2O2, ZnO nanoparticle etc. on sonolytic degradation of the organic dyes are discussed. From the studies it is concluded that the acidic condition is favorable for most of the dye degradation. Assessing the results of earlier studies we have also found that the aforementioned additives aided the degradation of dye molecules depending on their amount used in sonication with relatively higher or lower extent. Therefore, dye molecule from environment especially from waste water can be effectively reduced by using sonochemical irradiation process.
使用超声波降解有害染料是一种非常有效和合适的方法。为了阐明降解机理,许多研究都使用超声波辐照法研究了水介质中不同添加剂对染料分子的分解作用。本综述讨论了超声化学处理的基本原理和不同参数(如 pH 值、辐照时间、不同添加剂(如 NaCl、Na2SO4、CCl4、H2O2、纳米氧化锌等))对有机染料超声降解的影响。研究结果表明,酸性条件有利于大多数染料的降解。在评估之前的研究结果时,我们还发现,上述添加剂对染料分子降解的帮助程度视其在超声处理中的用量而有高低之分。因此,利用声化学辐照工艺可以有效减少环境中的染料分子,尤其是废水中的染料分子。
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引用次数: 0
Research Status and Development Trend of Mechanized Sand Production Process and Equipment Optimization 机制砂生产工艺与设备优化的研究现状与发展趋势
Pub Date : 2024-06-11 DOI: 10.9734/jerr/2024/v26i71194
Gaocheng Nie, Yuyin Zhang, Xintian Wang, Fangjia Fu, Liyan Kang, Junxu Ma
With the continuous development of engineering construction industry, the demand for sand used in construction is increasing, the traditional natural sand is increasingly in short supply, and the demand for mechanical sand is increasing. The vertical shaft impact sand machine is an important equipment machine in the production process of mechanical sand. The rotor in the vertical shaft impact sand machine is the core part of the normal work of the sand machine. Studying the rotor in the vertical shaft impact sand machine can improve the efficiency and stability of the sand machine in the sand making process. Compared with the research results at home and abroad, the type and research direction of rotor structure are summarized, and the development trend of vertical shaft impact sand making machine is proposed.
随着工程建筑行业的不断发展,建筑用砂的需求量越来越大,传统的天然砂越来越供不应求,机制砂的需求量也越来越大。立轴冲击式制砂机是机制砂生产过程中的重要设备机器。立轴冲击式制砂机中的转子是制砂机正常工作的核心部分。对立轴冲击式制砂机转子进行研究,可以提高制砂机在制砂过程中的工作效率和稳定性。对比国内外的研究成果,总结了转子结构的类型和研究方向,提出了立轴冲击式制砂机的发展趋势。
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引用次数: 0
Research on Lifting Path Planning Algorithms for Intelligent Cranes 智能起重机提升路径规划算法研究
Pub Date : 2024-06-11 DOI: 10.9734/jerr/2024/v26i71193
Guoxiang Yu, Shoubo Wang
Path planning algorithm is one of the key technologies in the study of intelligent cranes, and a good path planning algorithm can quickly plan a safe and collision-free path. The current research status of path planning technology in the field of crane lifting path planning is reviewed. The implementation principles of various types of algorithms are analysed, and the current research status of mainstream path planning algorithms is summarized. According to the characteristics of crane path planning algorithms, crane path planning algorithms are classified into traditional path planning algorithms, intelligent path planning algorithms and deep reinforcement learning algorithms. For each type of algorithm is analysed and summarized, and the development of crane path planning algorithms is looked forward to, hoping to provide reference for related research.
路径规划算法是智能起重机研究的关键技术之一,好的路径规划算法可以快速规划出安全、无碰撞的路径。本文综述了路径规划技术在起重机起重路径规划领域的研究现状。分析了各类算法的实现原理,总结了主流路径规划算法的研究现状。根据起重机路径规划算法的特点,将起重机路径规划算法分为传统路径规划算法、智能路径规划算法和深度强化学习算法。针对每类算法进行了分析和总结,并对起重机路径规划算法的发展进行了展望,希望能为相关研究提供参考。
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引用次数: 0
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Journal of Engineering Research and Reports
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