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Flood Mapping and Damage Analysis Using Multispectral Sentinel-2 Satellite Imagery and Machine Learning Techniques 利用多光谱哨兵-2 卫星图像和机器学习技术进行洪水测绘和损害分析
Q3 Computer Science Pub Date : 2024-07-15 DOI: 10.2174/0126662558309143240529104953
Rashmi Saini, Shivam Rawat, Suraj Singh, Prabhakar Semwal
Floods are among the deadliest natural calamities, devastating ecosystems and human lives worldwide. In India, Bihar is a state grappling with economic hardshipsand faces severe agricultural devastation due to recurring floods, destroying crops and naturalresources, which significantly impacts local farmers. This research addresses the critical needto deeply understand the flood dynamics of selected study areas.This research presents a case study that focuses on leveraging Remote Sensing toolsand Machine Learning techniques for comprehensive flood mapping and damage analysis inGopalganj District, Bihar, India, using remote sensing data. More specifically, this researchpresents three major objectives: (i) Flood damage mapping and change analysis before and after the flood using the Sentinel-2 satellite dataset, (ii) Evaluation of the impact of integratingspectral indices on the accuracy of classification, (iii) Identification of most robust predictorspectral indices for the classification.The Sentinel-2 satellite dataset encompasses 13 bands with resolutions of 10m, 20m,and 60m. Here, four spectral bands (NIR, Red, Green, and Blue) with the finest resolution of10m have been selected for this study. These bands are integrated with four spectral indices,namely Normalized Difference Water Index (NDWI), MNDWI (Modified NDWI), NormalizedDifference Vegetation Index (NDVI), and Soil Adjusted Vegetation Index (SAVI). Two MLclassifiers, namely Support Vector Machine (SVM) and Random Forest (RF) have been employed for pixel-based supervised classification.Results have shown that RF outperformed and worked well in extracting water bodiesand flood-damaged areas effectively. The results demonstrated that RF obtained (Overall Accuracy (OA)= 89.54% and kappa value (ka) = 0.872) and SVM reported (OA= 87.69%, ka=0.849) for pre-crisis data, whereas, for post-crisis, RF reported (OA=91.54%, ka = 0.897),SVM reported (OA= 89.77%, ka= 0.875).It was reported that the integration of spectral indices improved the OA by+3.41% and +2.86% using RF and SVM, respectively. The results of this study demonstratedthat the waterbody area increased from 12.72 to 88.23 km2,as shown by the RF classifier. Thevariable importance computation results indicated that MNDWI is the most important predictorvariable, followed by NDWI. This study recommends the use of these two predictor variablesfor flood mapping.
洪水是最致命的自然灾害之一,在全球范围内对生态系统和人类生活造成了严重破坏。在印度,比哈尔邦是一个经济困难的邦,由于洪水频发,农业面临严重破坏,农作物和自然资源被毁,给当地农民造成了巨大影响。本研究针对深入了解选定研究地区洪水动态的迫切需要,提出了一个案例研究,重点是利用遥感数据,利用遥感工具和机器学习技术,在印度比哈尔邦戈帕尔甘杰区进行全面的洪水绘图和损害分析。更具体地说,这项研究有三个主要目标:(i) 利用哨兵-2 号卫星数据集绘制洪水损失图并分析洪水前后的变化;(ii) 评估综合光谱指数对分类准确性的影响;(iii) 识别最稳健的预测光谱指数用于分类。本研究选择了分辨率最高为 10 米的四个光谱波段(近红外、红、绿和蓝)。这些波段与四个光谱指数进行了整合,即归一化差异水指数(NDWI)、MNDWI(修正的归一化差异水指数)、归一化差异植被指数(NDVI)和土壤调整植被指数(SAVI)。结果表明,RF 在有效提取水体和洪水灾区方面表现出色,效果良好。结果表明,对于危机前的数据,RF 获得了(总体准确率 (OA)= 89.54%,kappa 值 (ka) = 0.872),SVM 报告了(OA= 87.69%,ka=0.849),而对于危机后的数据,RF 报告了(OA=91.据报告,使用 RF 和 SVM 将光谱指数整合后,OA 分别提高了+3.41%和+2.86%。研究结果表明,RF 分类器可将水体面积从 12.72 平方公里增加到 88.23 平方公里。变量重要性计算结果表明,MNDWI 是最重要的预测变量,其次是 NDWI。本研究建议在洪水测绘中使用这两个预测变量。
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引用次数: 0
Efficacy of Keystroke Dynamics-Based User Authentication in the Face of Language Complexity 基于按键动态的用户身份验证在语言复杂性面前的功效
Q3 Computer Science Pub Date : 2024-07-12 DOI: 10.2174/0126662558309578240705101526
Sandip Dutta, Utpal Roy, Soumen Roy
This study investigates the impact of language complexity on KeystrokeDynamics (KD) and its implications for accurate KD-based user authentication systemperformance in smartphones.This research meticulously analyzes keystroke patterns using 160 volunteers, includingboth frequently typed and infrequently typed texts. Our analysis of 12 anomaly detectionalgorithms reveals that a simple text-based KD system consistently outperforms its complexcounterpart with superior Equal Error Rates (EERs).As a result, the Scaled Manhattan anomaly detector achieves an EER of 2.48% forsimple text and an improvement over 2.98% for complex text. The incorporation of soft biometricsfurther enhances algorithmic performance, emphasizing strategies to build resilienceinto KD-based user authentication systems.Throughout this study, the importance of text complexity is emphasized, and innovativepathways are introduced to strengthen KD-based user authentication paradigms.
本研究调查了语言复杂性对智能手机按键动力学(KD)的影响及其对基于按键动力学的精确用户身份验证系统性能的影响。本研究使用 160 名志愿者对按键模式进行了细致分析,包括频繁输入和不频繁输入的文本。我们对 12 种异常检测算法的分析表明,基于简单文本的 KD 系统始终优于复杂文本的系统,其平均错误率(EER)非常高。软生物识别技术的加入进一步提高了算法性能,强调了在基于 KD 的用户身份验证系统中建立弹性的策略。整个研究强调了文本复杂性的重要性,并引入了创新途径来加强基于 KD 的用户身份验证范例。
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引用次数: 0
Innovation in Knowledge Economy: A Case Study of 3D Printing's Rise inGlobal Markets and India 知识经济中的创新:3D 打印技术在全球市场和印度崛起的案例研究
Q3 Computer Science Pub Date : 2024-07-11 DOI: 10.2174/0126662558304420240705114015
Aman Semalty, R. Agrawal
3D printing is a rapidly growing technology with features of enhancedcustomizability, reduced errors, zero material waste, reduced costs, and quick turnaroundtimes. In this work, the data were collected from the Derwent Innovation and Web of Sciencedatabases for patent and publication search, respectively.The results were criticallyanalysed and correlated with the global and Indian market growth. USA (with 5 out of the topten patent contributing companies), China, Germany, France, and Taiwan were determined tobe the top countries with the maximum number of patents on 3D printing technology. Both patents and publications exhibited consistent growth until 2011. From 2012 onwards, the rate ofpatent filings began to surpass that of academic publications, indicating a shift in the dynamics.This trend has continued over the years, leading to a notable difference between thenumber of patents (19,322) and publications (10,571) in the year 2022. India has been found torank 8th in 3D printing innovation and research, globally.In this study, the globaland Indian market growth has been observed and the opportunities and challenges for the Indian market have been critically studied.
三维打印是一项快速发展的技术,具有增强可定制性、减少误差、零材料浪费、降低成本和快速周转时间等特点。在这项工作中,我们分别从 Derwent Innovation 和 Web of Scienced 数据库中收集了专利和出版物检索数据。美国(在贡献专利最多的十家公司中有五家)、中国、德国、法国和中国台湾被确定为拥有最多 3D 打印技术专利的国家。直到 2011 年,专利和出版物都呈现出持续增长的态势。从 2012 年起,专利申请率开始超过学术论文发表率,这表明动态发生了变化。这一趋势持续了数年,到 2022 年,专利数量(19,322 项)和论文发表数量(10,571 篇)之间将出现显著差异。本研究观察了全球和印度市场的增长情况,并对印度市场面临的机遇和挑战进行了深入研究。
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引用次数: 0
Cognitive Inherent SLR Enabled Survey for Software Defect Prediction 用于软件缺陷预测的认知固有 SLR 调查
Q3 Computer Science Pub Date : 2024-07-01 DOI: 10.2174/0126662558243958231207094823
Anurag Mishra, Ashish Sharma
Any software is created to help automate manual processes most of thetime. It is expected from the developed software that it should perform the tasks it is supposed to do.More formally, it should work in a deterministic manner. Further, it should be capable ofknowing if any provided input is not in the required format. Correctness of the software is inherentvirtue that it should possess. Any remaining bug during the development phase would hamper theapplication's correctness and impact the software's quality assurance. Software defect prediction isthe research area that helps the developer to know bug-prone areas of the developed software.Datasets are used using data mining, machine learning, and deep learning techniques toachieve study. A systematic literature survey is presented for the selected studies of software defectprediction.Using a grading mechanism, we calculated each study's grade based on its compliancewith the research validation question. After every level, we have selected 54 studies to include inthis study.
任何软件在大多数情况下都是用来帮助实现人工流程自动化的。更正式地说,软件应该以确定的方式工作。此外,它还应能够知道所提供的任何输入是否不符合要求的格式。软件的正确性是软件应具备的固有品质。开发阶段遗留的任何错误都会妨碍应用程序的正确性,影响软件的质量保证。软件缺陷预测是帮助开发人员了解所开发软件中容易出现缺陷的区域的研究领域。数据集使用数据挖掘、机器学习和深度学习技术来实现研究。我们对所选的软件缺陷预测研究进行了系统的文献调查,并采用分级机制,根据研究验证问题的符合性计算出每项研究的等级。经过层层筛选,我们选出了 54 项研究纳入本研究。
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引用次数: 0
An Era of Communication Technology Using Machine LearningTechniques in Medical Imaging 在医学影像中使用机器学习技术的通信技术时代
Q3 Computer Science Pub Date : 2024-07-01 DOI: 10.2174/266625581705240522173248
Vikash Yadav
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引用次数: 0
Explainable Artificial Intelligence in Internet-of-Medical Things 医疗物联网中的可解释人工智能
Q3 Computer Science Pub Date : 2024-06-01 DOI: 10.2174/266625581704240522171142
Y. Djenouri, Mohammad Kamrul Hasan, Rutvij H. Jhaveri
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引用次数: 0
Schema Extraction in NoSQL Databases: A Systematic Literature Review NoSQL 数据库中的模式提取:系统性文献综述
Q3 Computer Science Pub Date : 2024-02-16 DOI: 10.2174/0126662558273437231204061106
Saad Belefqih, A. Zellou, Mouna Berquedich
Nowadays, NoSQL databases have taken on an increasingly importantrole in the storage of massive data within companies. Due to a common property calledschema-less, NoSQL databases offer great flexibility, particularly for the storage of data in differentformats. However, despite their success in data storage, schema-less databases are a majorobstacle in areas requiring precise knowledge of this schema, especially in the field of dataintegration.This study presents a Systematic Literature Review (SLR) to explore, evaluate, anddiscuss relevant existing research and endeavors using novel schema extraction approaches.Furthermore, we conducted this study using a well-defined methodology to examine and studythe problem of schema extraction from NoSQL databases.Our research results highlight and emphasize the scheme extraction approaches andprovide knowledge to researchers and practitioners by proposing schema extraction approachesand their limitations, which contributes to inventing new, more efficient approaches.In our future work, inspired by the recent advances in quantum computing and theemergence of post-quantum cryptography (PQC), we aim to propose a schema extraction approachthat blends cutting-edge technologies with a strong focus on database security.
如今,NoSQL 数据库在公司内部海量数据的存储方面发挥着越来越重要的作用。由于 NoSQL 数据库具有称为无模式的共同特性,因此具有极大的灵活性,特别是在以不同格式存储数据方面。然而,尽管无模式数据库在数据存储方面取得了成功,但在需要精确了解该模式的领域,尤其是在数据整合领域,无模式数据库却是一大障碍。本研究通过系统性文献综述(SLR)来探索、评估和讨论使用新型模式提取方法的现有相关研究和努力。我们的研究成果突出强调了模式提取方法,并通过提出模式提取方法及其局限性为研究人员和从业人员提供了知识,这有助于发明更高效的新方法。在未来的工作中,受量子计算最新进展和后量子密码学(PQC)兴起的启发,我们将致力于提出一种模式提取方法,该方法将前沿技术与数据库安全紧密结合。
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引用次数: 0
Energy and Performance Centric Resource Allocation Framework inVirtual Machine Consolidation Using Reinforcement Learning Approach 使用强化学习方法在虚拟机整合中构建以能源和性能为中心的资源分配框架
Q3 Computer Science Pub Date : 2024-02-15 DOI: 10.2174/0126662558289911240206071447
Madala Guru Brahmam, Vijay Anand R
Virtual machines are used to reduce cloud platform application performance, managementcosts, and access irregularities. Virtual machines are frequently vulnerable to delays,overburdening workloads, and other obstacles while consolidating and migrating servers. Tosignificantly disperse loads among virtual machines, dynamic consolidation techniques are implementedto control energy dissipation, monitor overloading, and address underloading problems.The process of consolidation involves more calculations and resources in orderto transfer services between virtual machines, provided that Service Level Agreements are observed.The suggested approach promotes the use of cutting-edge architecture to combinevirtual machines, and, therefore, strike a balance between performance and energy requirements.The main design considerations for the suggested Dynamic Weightage algorithm,which includes the clustering approach in relation to reinforcement learning approaches, areoverall resource needs and Performance to Power Ratio (PPR). A cluster of ideal virtual machinesis created, and resources are distributed according to performance and energy requirements.Virtual machine resource requests are converted into a matching relationship factor,which represents the individual hosts while taking PPR into account. The overall workload associatedwith virtual machine consolidation is also provided by these estimations. It is notedthat there is little energy trade-off and that performance is maintained at a nominal level acrossthe cluster. The architecture is put into practice throughout offline platforms, which are dispersedecosystems that allow for increased system performance and scaling.The CloudSim simulator is used to validate the system using datasets that are obtainedfrom PlanetLab. According to the data, energy saving has produced yields of up to 47% andpromising quality of service attributes.The validation of the system is performed using the CloudSim simulator with datasetsfrom PlanetLab. The results indicate significant energy conservation, up to 47%, alongwith promising quality of service parameters. The proposed architecture is compared with otherstate-of-the-art algorithms for distributed architectures and heterogeneous environments,showcasing its efficiency. The conclusion emphasizes the prioritization of VM consolidationand energy efficiency in the proposed architecture, which has been tested on a Proliant G7-based data center using a variety of hosts. Notably, the CloudSim Toolkit is highlighted as outperformingOpenStack-based techniques in simulation results.
虚拟机用于降低云平台应用性能、管理成本和访问不稳定性。在整合和迁移服务器时,虚拟机经常容易受到延迟、工作负载过重和其他障碍的影响。为了在虚拟机之间显著分散负载,需要采用动态整合技术来控制能量消耗、监控过载并解决负载不足的问题。整合过程涉及更多的计算和资源,以便在遵守服务水平协议的前提下在虚拟机之间传输服务。建议的方法提倡使用最先进的架构来组合虚拟机,从而在性能和能源需求之间取得平衡。建议的动态加权算法(包括与强化学习方法相关的聚类方法)的主要设计考虑因素是总体资源需求和性能功率比(PPR)。虚拟机资源请求被转换为匹配关系因子,该因子代表单个主机,同时考虑到 PPR。虚拟机资源请求被转换为匹配关系系数,该系数代表单个主机,同时考虑了 PPR。与虚拟机整合相关的总体工作量也由这些估算提供。我们注意到,在整个集群中几乎不存在能源权衡,性能也保持在额定水平。该架构通过离线平台付诸实践,离线平台是分散的生态系统,可提高系统性能和扩展性。数据显示,节能产生了高达 47% 的收益率,并提升了服务质量属性。结果表明,该系统节能效果显著,节能率高达 47%,而且服务质量参数也很不错。将所提出的架构与其他适用于分布式架构和异构环境的最先进算法进行了比较,以展示其效率。结论强调了拟议架构中虚拟机整合和能效的优先级,该架构已在基于 Proliant G7 的数据中心上使用各种主机进行了测试。值得注意的是,CloudSim 工具包在仿真结果中的表现优于基于 OpenStack 的技术。
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引用次数: 0
A Comprehensive Study of Deep Learning Techniques to PredictDissimilar Diseases in Diabetes Mellitus Using IoT 利用物联网预测糖尿病异类疾病的深度学习技术综合研究
Q3 Computer Science Pub Date : 2024-01-30 DOI: 10.2174/0126662558291849240118104616
Ramesh Balaraju, Kuruva Lakshmanna
India has evaluated 77 million people with diabetes, which makes it the second mostelaborated disease in the world. Diabetes is a chronic syndrome that occurs with increased sugarlevels in the blood cells. Once diabetes is diagnosed and untreated by physicians, it may affectthe internal organs slowly, so there is a necessity for early prediction. Popular MachineLearning (ML) techniques existed for the early prediction of diabetes mellitus. A significantperspective is to be considered in total management by machine learning algorithms, but it isnot a good enough model to predict DMT2. Therefore, Deep learning (DL) models are utilizedto produce enhanced prediction accuracy. The ML methods are evaluated and analyzed distinctlyon the inconspicuous test information. DL is a subpart of ML with many data sets recurrentlyused to train the system. IoT was another emerging technology-based Healthcare MonitoringSystem (HMS) built to support the vision of patients and doctors in the healthcare domain.This paper aims to survey ML and DL techniques relevant to Dissimilar Disease predictionin Diabetes Mellitus. Finally, by doing a study on it, deep learning methods performedwell in predicting the dissimilar diseases related to diabetes and also other disease predictionsusing m-IoT devices. This study will contribute to future deep-learning ideas that will assist indetecting diabetic-related illnesses with greater accuracy.
据估计,印度有 7700 万糖尿病患者,是世界上发病率第二高的疾病。糖尿病是一种慢性综合征,随着血细胞中糖分水平的升高而发生。糖尿病一旦被诊断出来,如果没有得到医生的治疗,可能会慢慢影响内脏器官,因此有必要进行早期预测。目前流行的机器学习(ML)技术可用于糖尿病的早期预测。机器学习算法在全面管理中考虑了一个重要的视角,但它还不足以成为预测 DMT2 的良好模型。因此,深度学习(DL)模型被用来提高预测的准确性。在不显眼的测试信息上对 ML 方法进行了独特的评估和分析。DL 是 ML 的一个子部分,经常使用许多数据集来训练系统。物联网是另一种基于新兴技术的医疗保健监测系统(HMS),旨在支持医疗保健领域患者和医生的愿景。最后,通过对其进行研究,深度学习方法在预测与糖尿病相关的异类疾病以及使用移动物联网设备预测其他疾病方面表现良好。这项研究将为未来的深度学习理念做出贡献,有助于更准确地检测糖尿病相关疾病。
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引用次数: 0
Cross-Attention Based Text-Image Transformer for Visual QuestionAnswering 基于交叉注意力的可视化问答文本图像转换器
Q3 Computer Science Pub Date : 2024-01-30 DOI: 10.2174/0126662558291150240102111855
Mahdi Rezapour
Visual question answering (VQA) is a challenging task that requiresmultimodal reasoning and knowledge. The objective of VQA is to answer natural languagequestions based on corresponding present information in a given image. The challenge of VQAis to extract visual and textual features and pass them into a common space. However, themethod faces the challenge of object detection being present in an image and finding the relationship between objects.In this study, we explored different methods of feature fusion for VQA, using pretrained models to encode the text and image features and then applying different attentionmechanisms to fuse them. We evaluated our methods on the DAQUAR dataset.We used three metrics to measure the performance of our methods: WUPS, Acc, andF1. We found that concatenating raw text and image features performs slightly better than selfattention for VQA. We also found that using text as query and image as key and value performs worse than other methods of cross-attention or self-attention for VQA because it mightnot capture the bidirectional interactions between the text and image modalitiesIn this paper, we presented a comparative study of different feature fusion methods for VQA, using pre-trained models to encode the text and image features and then applyingdifferent attention mechanisms to fuse them. We showed that concatenating raw text and imagefeatures is a simple but effective method for VQA while using text as query and image as keyand value is a suboptimal method for VQA. We also discussed the limitations and future directions of our work.
视觉问题解答(VQA)是一项具有挑战性的任务,需要多模态推理和知识。VQA 的目标是根据给定图像中相应的当前信息回答自然语言问题。VQA 的挑战在于提取视觉和文本特征,并将它们传递到一个共同的空间。在这项研究中,我们探索了不同的 VQA 特征融合方法,使用预训练模型对文本和图像特征进行编码,然后应用不同的注意机制对它们进行融合。我们在 DAQUAR 数据集上对我们的方法进行了评估:我们使用了三个指标来衡量我们的方法的性能:WUPS、Acc 和 F1。我们发现,就 VQA 而言,将原始文本和图像特征融合在一起的性能略优于自我注意。我们还发现,在 VQA 中,使用文本作为查询,使用图像作为键和值的表现比其他交叉注意或自我注意方法差,因为它可能无法捕捉文本和图像模式之间的双向交互。我们的研究表明,将原始文本和图像特征串联起来是一种简单而有效的 VQA 方法,而使用文本作为查询和图像作为键和值则是一种次优的 VQA 方法。我们还讨论了我们工作的局限性和未来方向。
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