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Analyzing Flood Damage and Mapping Flood Hazard Zones Using AHP Model: A Case Study of Pol-e-Alam, Logar Province, Afghanistan 利用 AHP 模型分析洪灾损失并绘制洪灾危险区图:阿富汗洛加尔省 Pol-e-Alam 案例研究
Pub Date : 2024-03-20 DOI: 10.34104/ajeit.024.037050
This research aims to evaluate the impact of the most recent floods that occurred on August 20, 2022, in Logar province in southern Afghanistan. For this purpose, changes in land use and land cover (LULC) of the study area were created from the Sentinel-2 image with a spatial resolution of 10 meters. To achieve this, the study utilized Sentinel-2 images to analyze LULC changes before and after the flood event and employed a support vector machine for supervised classification. The study also applied the analytical hierarchy process (AHP) to evaluate the future risks of flooding in the study area, focusing on factors related to hydrological phenomena. Overall, the study demonstrates the effectiveness of geospatial technologies and remote sensing in assessing the impacts of floods and creating flood risk maps. This can significantly reduce the consequences of flooding and inform decision-making for disaster management and mitigation.
本研究旨在评估 2022 年 8 月 20 日在阿富汗南部洛加尔省发生的最近一次洪灾的影响。为此,研究人员利用空间分辨率为 10 米的哨兵-2 号图像创建了研究区域的土地利用和土地覆被 (LULC) 变化情况。为此,该研究利用 Sentinel-2 图像分析了洪水事件前后 LULC 的变化,并采用支持向量机进行了监督分类。研究还应用了分析层次过程(AHP)来评估研究区域未来的洪水风险,重点关注与水文现象相关的因素。总之,该研究证明了地理空间技术和遥感在评估洪水影响和绘制洪水风险地图方面的有效性。这可以大大减少洪水造成的后果,并为灾害管理和减灾决策提供信息。
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引用次数: 0
Effective Stroke Prediction using Machine Learning Algorithms 利用机器学习算法进行有效的中风预测
Pub Date : 2024-03-09 DOI: 10.34104/ajeit.024.026036
One of the main factors that lead to death globally is stroke. The main reason for death by stroke is not taking prevention measures early and not understanding stroke. As a result, death by stroke is thriving all over the world, especially in developing countries like Bangladesh. Steps must be taken to identify strokes as early as possible. In this case, machine learning can be a solution. This study aims to find the appropriate algorithms for machine learning to predict stroke early and accurately and identify the main risk factors for stroke. To perform this work, a real dataset was collected from the Kaggle website and split into two parts: train data and test data, and seven machine learning algorithms such as Random Forest, Decision Tree, K-Nearest Neighbor, Adapting Boosting, Gradient Boosting, Logistic Regression, and Support Vector Machine were applied to that train data. Performance evaluation was calculated based on six performance metrics accuracy, precision, recall, F1-score, ROC curve, and precision-recall curve. To figure out the appropriate algorithm for stroke prediction, the performance for each algorithm was compared, and Random Forest was discovered to be the most effective algorithm with 0.99 accuracy, precision, recall, F1-score, an AUC of 0.9925 for the ROC curve, and an AUC of 0.9874 for the precision-recall curve. Finally, feature importance scores for each algorithm were calculated and ranked in descending order to find out the top risk factors for stroke like ‘age’, ‘average glucose level’, ‘body mass index’, ‘hypertension', and ‘smoking status’. The developed model can be used in different health institutions for stroke prediction with high accuracy.
在全球范围内,中风是导致死亡的主要因素之一。中风致死的主要原因是没有及早采取预防措施和不了解中风。因此,全世界因中风死亡的人数在不断增加,尤其是在孟加拉国这样的发展中国家。必须采取措施尽早识别中风。在这种情况下,机器学习不失为一种解决方案。本研究旨在为机器学习找到合适的算法,以尽早准确地预测中风,并识别中风的主要风险因素。为了完成这项工作,我们从 Kaggle 网站上收集了一个真实数据集,将其分为训练数据和测试数据两部分,并对训练数据应用了随机森林、决策树、K-近邻、适应性提升、梯度提升、逻辑回归和支持向量机等七种机器学习算法。性能评估根据准确率、精确率、召回率、F1-分数、ROC 曲线和精确率-召回率曲线六项性能指标进行计算。为了找出适合中风预测的算法,对每种算法的性能进行了比较,发现随机森林是最有效的算法,其准确率、精确率、召回率、F1-分数均为 0.99,ROC 曲线的 AUC 为 0.9925,精确率-召回率曲线的 AUC 为 0.9874。最后,计算了每种算法的特征重要性得分,并按降序排列,找出了 "年龄"、"平均血糖水平"、"体重指数"、"高血压 "和 "吸烟状况 "等脑卒中的首要风险因素。所开发的模型可用于不同的医疗机构,对中风进行高精度预测。
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引用次数: 0
Field Performance Evaluation of a Power Tiller Operated Potato Planter 动力耕作机马铃薯播种机的田间性能评估
Pub Date : 2024-02-14 DOI: 10.34104/ajeit.024.019025
ABSTRACTThe research aimed to evaluate the field performance of a potato planter powered by a power tiller at the Regional Wheat Research Institute, BARI, Rajshahi. The study was conducted at a farmer's field in the potato-growing region of Shyampur, Rajshahi, from August 2013 to January 2014. The planter maintained a 250 mm gap between seeds and a single row spacing of 60 mm. Field trials were conducted at different operating speeds and seed sizes for assessment. The study revealed that an optimal forward speed of 2.5 km/hr resulted in the most uniform seed spacing and minimal seed gaps. Field demonstrations in Shyampur showed the potato planters' average effective field capacity was 0.11 ha/hr, with a 5% seed absence rate. In comparison to the traditional manual planting method, which required 53.3 man-days/ha, the potato planter significantly reduced labor requirements to 3 man-days per hectare. The total cost of planting was Tk.1781.82/ha. While the conventional method slightly outperformed mechanically planted plots in yields, using the power-tiller-operated potato planter demonstrated significant savings. A farmer's field day showcased crops from both planting methods, highlighting the substantial labor (95%) and cost (53%) savings achieved by adopting the mechanical planting approach. Considering the comparative performance, it is recommended that low-income farmers adopt the power tiller-operated potato planter to increase planting efficiency, cover more area in less time, and significantly reduce production costs compared to traditional methods.
摘要该研究旨在评估拉杰沙希地区小麦研究所(BARI)用动力耕作机驱动的马铃薯播种机的田间性能。研究于 2013 年 8 月至 2014 年 1 月在拉杰沙希省 Shyampur 马铃薯种植区的农民田间进行。播种机的种子间距为 250 毫米,单行行距为 60 毫米。田间试验以不同的操作速度和种子大小进行评估。研究表明,2.5 千米/小时的最佳前进速度可实现最均匀的种子间距和最小的种子间隙。在 Shyampur 的实地演示显示,马铃薯播种机的平均有效田间作业能力为 0.11 公顷/小时,缺种率为 5%。与每公顷需要 53.3 个人工日的传统人工种植方法相比,马铃薯播种机大大减少了劳动力需求,每公顷仅需 3 个人工日。种植总成本为每公顷 1781.82 塔卡。虽然传统方法的产量略高于机械种植的地块,但使用动力耕作机操作的马铃薯播种机却能节省大量成本。农民田间日展示了两种种植方法的作物,突出表明采用机械种植方法节省了大量劳动力(95%)和成本(53%)。考虑到性能比较,建议低收入农民采用动力耕作马铃薯播种机,以提高种植效率,在更短的时间内覆盖更多的面积,并显著降低生产成本。
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引用次数: 0
Field Performance Evaluation of a Power Tiller Operated Potato Planter 动力耕作机马铃薯播种机的田间性能评估
Pub Date : 2024-02-14 DOI: 10.34104/ajeit.024.019025
ABSTRACTThe research aimed to evaluate the field performance of a potato planter powered by a power tiller at the Regional Wheat Research Institute, BARI, Rajshahi. The study was conducted at a farmer's field in the potato-growing region of Shyampur, Rajshahi, from August 2013 to January 2014. The planter maintained a 250 mm gap between seeds and a single row spacing of 60 mm. Field trials were conducted at different operating speeds and seed sizes for assessment. The study revealed that an optimal forward speed of 2.5 km/hr resulted in the most uniform seed spacing and minimal seed gaps. Field demonstrations in Shyampur showed the potato planters' average effective field capacity was 0.11 ha/hr, with a 5% seed absence rate. In comparison to the traditional manual planting method, which required 53.3 man-days/ha, the potato planter significantly reduced labor requirements to 3 man-days per hectare. The total cost of planting was Tk.1781.82/ha. While the conventional method slightly outperformed mechanically planted plots in yields, using the power-tiller-operated potato planter demonstrated significant savings. A farmer's field day showcased crops from both planting methods, highlighting the substantial labor (95%) and cost (53%) savings achieved by adopting the mechanical planting approach. Considering the comparative performance, it is recommended that low-income farmers adopt the power tiller-operated potato planter to increase planting efficiency, cover more area in less time, and significantly reduce production costs compared to traditional methods.
摘要该研究旨在评估拉杰沙希地区小麦研究所(BARI)用动力耕作机驱动的马铃薯播种机的田间性能。研究于 2013 年 8 月至 2014 年 1 月在拉杰沙希省 Shyampur 马铃薯种植区的农民田间进行。播种机的种子间距为 250 毫米,单行行距为 60 毫米。田间试验以不同的操作速度和种子大小进行评估。研究表明,2.5 千米/小时的最佳前进速度可实现最均匀的种子间距和最小的种子间隙。在 Shyampur 的实地演示显示,马铃薯播种机的平均有效田间作业能力为 0.11 公顷/小时,缺种率为 5%。与每公顷需要 53.3 个人工日的传统人工种植方法相比,马铃薯播种机大大减少了劳动力需求,每公顷仅需 3 个人工日。种植总成本为每公顷 1781.82 塔卡。虽然传统方法的产量略高于机械种植的地块,但使用动力耕作机操作的马铃薯播种机却能节省大量成本。农民田间日展示了两种种植方法的作物,突出表明采用机械种植方法节省了大量劳动力(95%)和成本(53%)。考虑到性能比较,建议低收入农民采用动力耕作马铃薯播种机,以提高种植效率,在更短的时间内覆盖更多的面积,并显著降低生产成本。
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引用次数: 0
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Australian Journal of Engineering and Innovative Technology
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