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Analyzing flash flood risk in a section of ntawogba creek, Port Harcourt city, Rivers State 分析河流州哈科特港市恩塔沃格巴河部分地区的山洪暴发风险
Pub Date : 2022-07-30 DOI: 10.56355/ijfret.2022.1.1.0003
Richard JU, Ibochi Andrew Abah, Ugwulebo BA
Flood is a natural disaster and occurred in different forms. It is also a factor of climate change. Flash flood is a type of flood that occurs within few hours of intensive precipitation. It poses serious threat to urban areas, particularly in less developed countries. Geospatial technology has been very useful in mapping spatial extent and quantified damages associated with flash flood events. Proximity analysis and AHP has been widely utilized in modeling flash flood vulnerable zones. Little was known about MCA ranking method which is considered appropriate for few parameters in making complex decisions. This study utilized MCA ranking method to analyzed flash flood risk within Ntawogba Creek, Port Harcourt, Rivers State. Rainfall, slope model, impervious surface and distance to river were used in the decision making. The datasets were processed into common spatial referenced system. Each criterion was scaled from 5 to 1, with 5 being very high risk and 1 very low risk area. Weights were assigned to the criteria based on the importance, with higher weight to criterion that is more important in the decision making process. The weights are; distance to water channel 48, impervious surface 25, slope 22 and rainfall 5. The results obtained showed area of 93.0ha as very high flash flood risk representing 6% of the area. This zone was located along Ntawogba Creek and on major roads. Total area of high risk zone was 864.1ha representing 56%, moderate risk and low risk zone was 452.2ha and 134.7ha with 29.3 5 and 8.7% respectively. For further study, drainage density and soil infiltration should be included in the flash flood risk analysis.
洪水是一种自然灾害,发生的形式多种多样。它也是气候变化的一个因素。山洪是一种发生在强降水后几小时内的洪水。它对城市地区,特别是欠发达国家的城市地区构成严重威胁。地理空间技术在绘制与山洪灾害相关的空间范围和量化灾害损失方面非常有用。邻近分析和层次分析法在山洪易损区建模中得到了广泛的应用。人们对MCA排序法知之甚少,认为它适用于很少的参数来做出复杂的决策。本研究利用MCA排序法分析了河流州哈科特港Ntawogba Creek内的山洪风险。决策中考虑了降雨量、坡度模型、不透水面和与河流的距离。将数据集处理成公共空间参考系统。每个标准从5到1,5是非常高的风险区域,1是非常低的风险区域。根据重要程度对各指标赋予权重,在决策过程中越重要的指标权重越高。权重是;距离水道48,不透水表面25,坡度22,降雨量5。结果显示,93.0公顷的面积占该地区6%,是山洪暴发风险极高的地区。这个区域位于恩塔沃格巴河沿岸和主要道路上。高风险区总面积为864.1ha,占56%,中风险区面积为452.2ha,低风险区面积为134.7ha,分别占29.3.5%和8.7%。为了进一步研究,应将排水密度和土壤入渗量纳入山洪风险分析。
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引用次数: 0
Fault prediction model on electrical power network using artificial neural network-based time series: A case study of Ayede-Eruwa/ Lanlate Feeder 基于时间序列的人工神经网络电力网络故障预测模型——以阿伊德-埃鲁瓦/兰纳特输电网为例
Pub Date : 2022-07-30 DOI: 10.56355/ijfret.2022.1.1.0004
Bolarinwa Samson Adeleke, Adewale Abayomi Alabi, Sunday Oyinlola Ogundoyin, Ademola Adekunle Araromi
Increase in size of electrical power network usually results in a rise in fault level and consequently in huge economic losses to energy providers and consumers in the distribution systems. Therefore, it is very important to be proactive in dealing with faults on distribution feeder systems not only to reduce financial havoc, but to save lives and improve the quality of life of the people. A case study of Ayede-Eruwa/Lanlate Oyo State, Nigeria 33kV line is considered. An Artificial Neural Network based Time Series (ANN-TS) fault predictive model is developed for forecasting of faults on the above chosen electrical power network. Daily forced outage readings of the substation’s feeders for three years were collected and modeled using a three-layer feed-forward network ANN-TS. The results in the frequency of fault prediction show that there is an overlap between the observed and predicted values. The annual Mean Average Percentage Error (MAPE) varies between 0.004% and 25%, and the feeders’ average MAPE ranges from 6% to 10%. The fault duration annual MAPE varies between 0.001% and 25.54% while the feeders’ average MAPE varies between 6% and 11%. The energy loss prediction follows the same trend with the annual MAPE alternating between 0.01% and 26.75%, andthe feeders’ average MAPE between 6% and 10%. The average overall MAPE of each feeder is between 6% and 10% which indicates that the developed model is about 90% to 94% accurate. Although, the model is designed for Ayede-Eruwa/Lanlate feeder, it could be utilized for effective prediction of faults in any power distribution network.
电网规模的增大往往会导致故障水平的上升,从而给配电系统的能源供应商和消费者带来巨大的经济损失。因此,积极主动地处理配电馈线系统的故障,不仅可以减少经济损失,而且可以挽救生命,提高人们的生活质量。本文考虑了尼日利亚Ayede-Eruwa/Lanlate Oyo州33kV线路的案例研究。建立了基于人工神经网络的时间序列(ANN-TS)故障预测模型,对所选电网的故障进行预测。使用三层前馈网络ANN-TS收集了三年变电站馈线的每日强制中断读数并进行了建模。故障预测频率的结果表明,观测值与预测值之间存在重叠。年平均百分比误差(MAPE)在0.004%到25%之间,喂食者的平均MAPE在6%到10%之间。年故障持续时间MAPE在0.001% ~ 25.54%之间,馈线平均MAPE在6% ~ 11%之间。能量损失预测也遵循同样的趋势,年MAPE在0.01% ~ 26.75%之间交替,饲主平均MAPE在6% ~ 10%之间。每个给料机的平均整体MAPE在6%到10%之间,这表明所开发的模型的准确率约为90%到94%。虽然该模型是针对Ayede-Eruwa/Lanlate馈线设计的,但它可以有效地用于任何配电网的故障预测。
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引用次数: 0
The application of computer science in fractional distillation of petroleum 计算机科学在石油分馏中的应用
Pub Date : 2022-07-30 DOI: 10.56355/ijfret.2022.1.1.0005
A AtianashieMiracle, Chukwuma Chinaza Adaobi
The purpose of the study is to assess the application of Computer science in the fractional distillation of petroleum. The study sought to: Determine the merit of using Computer science in fractional distillation of petroleum. Evaluate the cost effectiveness to the application of Computer science in fractional distillation of petroleum to the welfare of citizens. Determine if Computer science can help in controlling the natural effects of fractional distillation of petroleum on the environment. Computer science has gained wider application in so many areas of human endeavor ranging from the homes to more scientific and industrial applications, hence its application of Computer science in fractional distillation of petroleum cannot be overemphasized. Irrespective of the benefits of the application of Computer science in fractional distillation of petroleum as a whole, it has become pertinent to ask how effective and efficient its application of Computer science in fractional distillation of petroleum has been. This research work tries to investigate how effective the application of Computer science in fractional distillation of petroleum. The project exertion covered statement of the problem, purpose of the study, research questions/hypotheses were formulated to enable the researcher find out facts about the study, highlighted in division one. Subdivision two was based on the literature review of this study. The study covers the research methodology which guided the study, the next stage was based on the presentation of data and its’ analysis as well as the discussion of findings. The final stage of the research was concerned with the conclusion as well as recommendations and suggestions for further studies
本研究的目的是评估计算机科学在石油分馏中的应用。该研究旨在:确定在石油分馏中使用计算机科学的优点。评估在石油分馏中应用计算机科学对市民福利的成本效益。确定计算机科学是否有助于控制石油分馏对环境的自然影响。计算机科学已经在人类努力的许多领域得到了广泛的应用,从家庭到更多的科学和工业应用,因此计算机科学在石油分馏中的应用怎么强调都不为过。不考虑计算机科学在石油分馏中的整体应用所带来的好处,计算机科学在石油分馏中的应用效果和效率如何已经成为一个相关的问题。本研究工作旨在探讨计算机科学在石油分馏中的应用效果。项目努力涵盖了问题的陈述,研究的目的,研究问题/假设的制定,使研究人员找到关于研究的事实,突出在第一部分。细分二是基于本研究的文献综述。该研究涵盖了指导研究的研究方法,下一阶段是基于数据的呈现及其分析以及对研究结果的讨论。研究的最后阶段涉及结论以及对进一步研究的建议和建议
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引用次数: 1
Scrutiny of principle of energy survival in beam-columns and analytical solution of governing partial nonlinear differential equation by new approach AYM 用新方法探讨梁柱能量存续原理及控制偏非线性微分方程解析解
Pub Date : 2022-07-30 DOI: 10.56355/ijfret.2022.1.1.0002
MR Akbari, Sara Akbari, Esmaeil Kalantari
In this manuscript, we investigate and solve a complicated highly nonlinear differential equations in the beam-column in the Energy Survival Principal equation on the beam-column to show the ability of the first invented method which we named it AYM (Akbari Yasna’s Method). Certainly, we know that nonlinear beam-column process are very complex, and the governing differential equations governing them are nonlinearity complex. In this paper we present a new analytical solution which can easily analyze all such problems and make a great evolution in the nonlinear designing in the solid engineering (civil and mechanical and etc.). Finally, this scientific approach can create a great phenomenon in the analytical solution of nonlinear problems in engineering sciences, especially in the solids engineering.
在本文中,我们研究并求解了梁柱上能量生存主方程中一个复杂的高度非线性梁柱微分方程,以展示我们发明的第一种方法的能力,我们将其命名为AYM (Akbari Yasna 's method)。当然,我们知道非线性梁柱过程是非常复杂的,控制它的微分方程也是非线性复型的。本文提出了一种新的解析解,可以方便地分析所有这类问题,对固体工程(土木和机械等)的非线性设计有很大的发展。最后,这种科学的方法可以在工程科学,特别是固体工程中非线性问题的解析解中创造一个伟大的现象。
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引用次数: 0
An overview of distributed generation in power systems 电力系统中分布式发电的概述
Pub Date : 2022-07-30 DOI: 10.56355/ijfret.2022.1.1.0001
Adebayo Adeniyi Daavid, Chinedu James Ujam
The need for smart electrical systems with minimal technological error and environmental impact is driving interest in Distributed Generations (DGs), which can have a number of additional benefits such as decreased transmission and distribution system resources, enhanced stability, and improved power efficiency, among others. Nonetheless, these benefits may or may not be valid depending on the system design and management. Furthermore, the role of small generation distributed in the low/medium voltage network has gained significance as a result of technological and administrative improvements in the electricity supply industry motivated by the advent of completion. This paper seek to address distributed generation in power systems.
对技术误差和环境影响最小的智能电力系统的需求正在推动人们对分布式发电(dg)的兴趣,分布式发电可以带来许多额外的好处,例如减少输配电系统资源、增强稳定性和提高电力效率等。尽管如此,这些好处可能有效,也可能无效,这取决于系统设计和管理。此外,由于完工后供电行业的技术和行政改进,分布在低压/中压网络中的小型发电的作用变得重要起来。本文试图解决电力系统中的分布式发电问题。
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引用次数: 0
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International Journal of Frontline Research in Engineering and Technology
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