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IoT-Enabled Plant Monitoring System with Power Optimization and Secure Authentication

Computers, Materials & Continua 2024年第11期81卷 3165-3187页

作者： Samsul Huda Yasuyuki Nogami Maya Rahayu Takuma Akada MdBiplob Hossain Muhammad Bisri Musthafa Yang Jie le hoang anh Green Innovation Center Okayama UniversityOkayama700-8530Japan Graduate School of Environmental LifeNatural Science and TechnologyOkayama UniversityOkayama700-8530Japan

Global food security is a pressing issue that affects the stability and well-being of communities *** existing Internet of Things(IoT)enabled plant monitoring systems have made significant strides in agricultural monitoring,they often face limitations such as high power consumption,restricted mobility,complex deployment requirements,and inadequate security measures for data *** paper introduces an enhanced IoT application for agricultural monitoring systems that address these critical *** system strategically combines power efficiency,portability,and secure access capabilities,assisting farmers in monitoring and tracking crop environmental *** proposed system includes a remote camera that captures images of surrounding plants and a sensor module that regularly monitors various environmental factors,including temperature,humidity,and soil *** implement power management strategies to minimize energy consumption compared to existing *** conventional systems,our implementation utilizes the Amazon Web Services(AWS)cloud platform for reliable data storage and processing while incorporating comprehensive security measures,including Two-Factor Authentication(2FA)and JSON Web Tokens(JWT),features often overlooked in current agricultural IoT *** can access this secure monitoring system via a developed Android application,providing convenient mobile access to the gathered plant *** validate our system’s advantages by implementing it with two potted garlic plants on Okayama University’s *** evaluation demonstrates high sensor reliabil-ity,with strong correlations between sensor readings and reference data,achieving determination coefficients(R2)of 0.979 for temperature and 0.750 for humidity *** implemented power management strategies extend battery life to 10 days on a single charge,significantly outperforming existing systems that typically require daily ***

关键词： Plant monitoring agriculture food security environmental monitoring IoT power management AWS secure access JWT

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他们为什么喜欢？顾漫小说在越南的接受分析

他们为什么喜欢？顾漫小说在越南的接受分析

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作者：黎黄英（le hoang anh）华南理工大学

学位级别：硕士

中国当代言情小说是中国当代文学的一个重要组成部分,也是越南当代文学的一道风景。在越南文学的发展过程中一直有着中国文学的影子,从中国四大名著到中国现代文学至今仍在越南受欢迎,特别是中国网络小说非常的火爆。目前中国当代言情... 详细信息

中国当代言情小说是中国当代文学的一个重要组成部分,也是越南当代文学的一道风景。在越南文学的发展过程中一直有着中国文学的影子,从中国四大名著到中国现代文学至今仍在越南受欢迎,特别是中国网络小说非常的火爆。目前中国当代言情小说在越南图书市场有着很高的占有率,这说明越南读者不仅接受而且还特别喜爱中国当代言情小说。顾漫是中国当代言情小说界中的一名网络年轻女作家,她在中国出版过的《何以笙萧默》、《微微一笑很倾城》、《杉杉来吃》和《骄阳似我》都被翻译成越南版。从2007年到2016年顾漫小说在越南一共出版4本小说,12个版本。而且她的作品在越南网络的阅读量都居领先地位,深受许多越南读者的关注与喜爱。为什么越南读者喜欢顾漫小说?这个问题从来没有任何研究或调查来解答。所以本研究将通过所收集到的资料来总结越南文坛和中国当代言情小说在越南的发展情况,同时也通过所收集到的数据来分析顾漫小说在越南的翻译与出版情况。另外本研究将对顾漫小说的越南粉丝进行深度访谈,找到越南读者对顾漫小说的解读形态,深入对越南读者进行接受分析。从此希望通过本文能为中国当代言情小说在越南的传播,特别是顾漫小说在越南的接受情况提供应有的贡献。

关键词：接受分析顾漫小说读者

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Ilizarov胫骨横向骨搬移血管再生技术对下肢慢性缺血性疾病临床疗效的初步研究

Ilizarov胫骨横向骨搬移血管再生技术对下肢慢性缺血性疾病临床疗...

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作者：武黎黄英（Vu le hoang anh）广西医科大学

学位级别：硕士

目的：初步探讨Ilizarov胫骨横向骨搬移血管再生技术对下肢慢性缺血性疾病的临床疗效。方法：回顾分析2012年4月至2012年7月在我院住院行Ilizarov胫骨横向骨搬移血管再生技术对下肢慢性缺血性疾病的4例病人,共有5个患肢;用Fontaine分... 详细信息

目的：初步探讨Ilizarov胫骨横向骨搬移血管再生技术对下肢慢性缺血性疾病的临床疗效。方法：回顾分析2012年4月至2012年7月在我院住院行Ilizarov胫骨横向骨搬移血管再生技术对下肢慢性缺血性疾病的4例病人,共有5个患肢;用Fontaine分期法进行分期诊断治疗;其中临床诊断为“下肢血栓闭塞性脉管炎,TAO" Fontaine IV期女性1例;“下肢动脉硬化闭塞症,ASO" Fontaine IV期男性3例;其中4例病人均发生足趾缺血性坏死,渗出伴有恶嗅,溃疡、疼痛;3例病人有动脉粥样硬化,无糖尿病、高血压、肝肾功能不全;1例病人有高血压病3级级高危组、小脑梗死。术前行患肢CT扫描+血管三维重建(Computed Tomography Artery,CTA)动脉粥样硬化狭窄1个患肢、显示胭动脉闭塞2个患肢、胫前动脉栓塞1个患肢和足背动脉及足底内外侧动脉栓塞1个患肢、4例病人的股深动脉和(或)者股浅动脉通畅、远端流出道不良。术中在病人的胫骨内侧嵴上开一小块胫骨窗2x12cm,术后第3天开始以每天缓慢横向外搬移1mm的游离胫骨窗,分4次完成,20天后停止。通过刺激骨膜和胫骨骨髓再生,以及刺激新鲜微小动脉再生,并形成新生毛细血管网。新生毛细血管网与原来的毛细血管网相连通,改善患肢缺血供。结果：5个患肢中4个患肢获得满意疗效。3例病人术后随访时间3-7个月,平均4.7个月,1例失访。下肢缺血症状明显改善,溃疡创面愈合,无并发症。1例病人术后2个月仍有患肢严重血供不良,病人放弃治疗要求下肢截肢术。结论：Ilizarov骨搬移血管再生技术对下肢慢性缺血性疾病有较好的临床疗效,能促进骨膜、骨髓再生和外周新生血管网形成,改善患肢局部血供,以及促进创面愈合。本手术方法简便,易操作;创面小,术后病情改善快,有利于避免截肢,减轻患者痛苦,提高患者的生活质量;手术费药物用低;病情不易复发。

关键词： Ilizarov 骨搬移血管再生技术血栓闭塞性脉管炎动脉硬化闭塞症

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亚洲商业银行利率风险管理研究

亚洲商业银行利率风险管理研究

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作者：黎氏黄英（le Thi hoang anh）东北大学

学位级别：硕士

金融市场的全球化和日益激烈的竞争在很大程度上影响着银行业业绩及其利率风险管理,特别是当越南将全面放开利率管制时。之前,在越南中央银行的控制下,利率长期保持稳定,缺乏面对利率波动的风险意识和应对措施导致越南银行业的风险管理... 详细信息

金融市场的全球化和日益激烈的竞争在很大程度上影响着银行业业绩及其利率风险管理,特别是当越南将全面放开利率管制时。之前,在越南中央银行的控制下,利率长期保持稳定,缺乏面对利率波动的风险意识和应对措施导致越南银行业的风险管理跟不上市场发展的要求。在利率完全市场化以后,利率将随市场供求变化而不规则地波动。利率风险可以影响银行的利息收入和市场价值。因此,利率风险管理是越南银行业急需加强和改善的问题。因此本文以亚洲商业银行(ACB)为例,研究了它的利率风险管理问题。本论文共分六章。第一章介绍了研究背景,研究目的与意义,研究方法及主要研究内容。第二章是理论框架,介绍了利率相关理论和利率风险管理。第三章阐述了 ACB利率风险管理的现状,对存在问题及其原因的分析。基于第二章的理论,对亚洲商业银行的风险识别、风险度量和风险评估进行了分析。从风险识别结果可以得出结论,利率风险主要以两种形式暴露-重新定价风险和可选择性风险。本文使用利率敏感性缺口和久期模型用于分析亚洲商业银行的利率风险度量。研究结果表明,亚洲商业银行利率风险管理的效率是中等的,这表明缺乏衡量和面对风险的方法以及用于收集与评估数据的信息技术。通过对利率风险的分析,本文提出ACB银行应采用VaR和压力测试等一系列方法和措施来完善利率风险控制策略。最后,本文还提出了一些进一步研究的建议。

关键词：亚洲商业银行利率市场化利率风险管理利率敏感性缺口久期

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Prediction of Shear Bond Strength of Asphalt Concrete Pavement Using Machine learning Models and Grid Search Optimization Technique

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 691-712页

作者： Quynh-anh Thi Bui Dam Duc Nguyen Hiep Van le Indra Prakash Binh Thai Pham Civil Engineering Department University of Transport Technology54 Trieu KhucThanh XuanHanoi100000Vietnam DDG(R)Geological Survey of India Gandhinagar382010India

Determination of Shear Bond strength(SBS)at interlayer of double-layer asphalt concrete is crucial in flexible pavement *** study used three Machine learning(ML)models,including K-Nearest Neighbors(KNN),Extra Trees(ET),and Light Gradient Boosting Machine(LGBM),to predict SBS based on easily determinable input ***,the Grid Search technique was employed for hyper-parameter tuning of the ML models,and cross-validation and learning curve analysis were used for training the *** models were built on a database of 240 experimental results and three input variables:temperature,normal pressure,and tack coat *** validation was performed using three statistical criteria:the coefficient of determination(R2),the Root Mean Square Error(RMSE),and the mean absolute error(MAE).Additionally,SHAP analysis was also used to validate the importance of the input variables in the prediction of the *** show that these models accurately predict SBS,with LGBM providing outstanding ***(Shapley Additive explanation)analysis for LGBM indicates that temperature is the most influential factor on ***,the proposed ML models can quickly and accurately predict SBS between two layers of asphalt concrete,serving practical applications in flexible pavement structure design.

关键词： Shear bond asphalt pavement grid search optimization machine learning

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Landslide Susceptibility Mapping Using RBFN-Based Ensemble Machine learning Models

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 467-500页

作者： Landslide Susceptibility Mapping Using RBFN-Based Ensemble Machine learning Models Duc-Dam Nguyen Nguyen Viet Tiep Quynh-anh Thi Bui Hiep Van le Indra Prakash Romulus Costache Manish Pandey Binh Thai Pham Faculty of Civil Engineering University of Transport TechnologyThanh XuanHa Noi100000Vietnam Faculty of Hydraulic Engineering Hanoi University of Civil EngineeringHa Noi100000Vietnam DDG(R)Geological Survey of India Gandhinagar382010India Research Institute of the University of Bucharest Bucharest050663Romania National Institute of Hydrology and Water Management Bucharest013686Romania Department of Civil Engineering Transilvania University of BrasovBrasov500152Romania Danube Delta National Institute for Research and Development Tulcea820112Romania Marwadi University Research Center(MURC) Marwadi UniversityRajkotGujaratBharat360003India Department of Civil Engineering Faculty of Engineering&TechnologyMarwadi UniversityRajkotGujaratBharat360003India

This study was aimed to prepare landslide susceptibility maps for the Pithoragarh district in Uttarakhand,India,using advanced ensemble models that combined Radial Basis Function Networks(RBFN)with three ensemble learning techniques:DAGGING(DG),MULTIBOOST(MB),and ADABOOST(AB).This combination resulted in three distinct ensemble models:DG-RBFN,MB-RBFN,and ***,a traditional weighted method,Information Value(IV),and a benchmark machine learning(ML)model,Multilayer Perceptron Neural Network(MLP),were employed for comparison and *** models were developed using ten landslide conditioning factors,which included slope,aspect,elevation,curvature,land cover,geomorphology,overburden depth,lithology,distance to rivers and distance to *** factors were instrumental in predicting the output variable,which was the probability of landslide *** analysis of the models’performance indicated that the DG-RBFN model,with an Area Under ROC Curve(AUC)of 0.931,outperformed the other *** AB-RBFN model achieved an AUC of 0.929,the MB-RBFN model had an AUC of 0.913,and the MLP model recorded an AUC of *** results suggest that the advanced ensemble ML model DG-RBFN was more accurate than traditional statistical model,single MLP model,and other ensemble models in preparing trustworthy landslide susceptibility maps,thereby enhancing land use planning and decision-making.

关键词： Landslide susceptibility map spatial analysis ensemble modelling information values(IV)

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An exploration of meteorological effects on PM_(2.5) air quality in several provinces and cities in Vietnam

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Journal of Environmental Sciences 2024年第11期145卷 139-151页

作者： Giang Tran Huong Nguyen Luan Thien La Huy hoang-Cong anh hoang le Faculty of Chemistry and Environment Dalat UniversityLam Dong ProvinceVietnam Environmental Protection Agency Lam Dong Province Department of Natural Resources and EnvironmentLam Dong ProvinceVietnam Northern Center for Environmental Monitoring Environmental Pollution Control DepartmentHa Noi CityVietnam Faculty of Environment University of ScienceHo Chi Minh CityVietnam Vietnam National University Ho Chi Minh CityVietnam

Linking meteorology and air pollutants is a key *** study investigated meteorological effects on PM_(2.5)concentration using the advanced convergent cross mapping method,utilizing hourly PM_(2.5)concentration and six meteorological factors across eight provinces and cities in *** demonstrated that temperature(ρ=0.30)and radiation(ρ=0.30)produced the highest effects,followed by humidity(ρ=0.28)and wind speed(ρ=0.24),while pressure(ρ=0.22)and wind direction(ρ=0.17)produced the weakest effects on PM_(2.5)*** theρvalues showed that temperature,wind speed,and wind direction had greater impacts on PM_(2.5)concentration during the dry season whereas radiation had a more influence during the wet season;Southern stations experienced larger meteorological ***,humidity,pressure,and wind direction had both positive and negative influences on PM_(2.5)concentration,while radiation and wind speed mostly had negative *** PM_(2.5)pollution episodes,there wasmore contribution ofmeteorological effects on PM_(2.5)concentration indicated byρ*** contaminated levels,humidity(ρ=0.45)was the most dominant factor affecting PM_(2.5)concentration,followed by temperature(ρ=0.41)and radiation(ρ=0.40).Pollution episodes were pointed out to be more prevalent under higher humidity,higher pressure,lower temperature,lower radiation,and lower wind ***ρcalculation also revealed that lower temperature,lower radiation,and higher humidity greatly accelerated each other under pollution episodes,further enhancing PM_(2.5)*** findings contributed to the literature on meteorology and air pollution interaction.

关键词： Fine particulate matter Air pollution Meteorological effect Convergent cross mapping Causality analysis Vietnam

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Flexible PVA/BMIMOTf/LLZTO composite electrolyte with liquid-comparable ionic conductivity for solid-state lithium metal battery

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Journal of Energy Chemistry 2022年第11期31卷 128-139,I0005页

作者： Hyesun Jeon Hai anh hoang Dukjoon Kim School of Chemical Engineering Sungkyunkwan UniversitySuwonGyeonggi 16419Republic of Korea

Poly(vinyl alcohol)(PVA)/1-butyl-3-methylimidazolium trifluoromethanesulfonate(BMIMOTf)/Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)(LLZTO)solid-state composite electrolyte(SSCE)membranes were synthesized for solid-state lithium metal battery *** garnet-type LLZTO nanoparticles were surface-coated with the polydopamine layer of 8-10 nm thickness to enhance the dispersion status of LLZTO particles in the PVA *** hydrophilic BMIMOTf ionic liquid(IL)was added along with LLZTO nanoparticles to enhance the ionic conductivity and electrochemical stability of the SSCE *** synthesized composite electrolyte membrane containing 7 wt%of LLZTO and 60 wt%of BMIMOTf showed the outstanding Li+conductivity of 2×10^(-3)S cm^(-1)and the lithium transference number of 0.76 at room temperature in the firm and flexible solid state with the tensile strength of 8 *** a high single ion conduction characteristic led to the quite low interfacial resistance of 39Ωbetween the composite electrolyte and the lithium *** to these superior properties of composite membranes,the LiFePO_(4)|SSCE|Li cell exhibited an excellent discharge capacity of 165 mAh g^(-1)at 0.2 C,maintaining the coulombic efficiency of 98%after 100 cycles at room temperature.

关键词： Polymer-matrix composites(PMCs) Interface/interphase Surface treatments Solid-state lithium-ion batteries

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Fabrication and properties of high efficiency luminescent nanorods EuPO_4·H_2O by soft template method

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Journal of Rare Earths 2011年第12期29卷 1174-1177页

作者： Tran Thu Huong Tran Kim anh le Thi Vinh W.Strek hoang Thi Khuyen le Quoc Minh Institute of Materials Science Vietnam Academy of Science and Technology Department of Chemistry Hanoi University of Mining and Geology Institute of Low Temperature and Structure Research University of Engineering and Technology National University Hanoi

Europium orthophosphate monohydrate （EuPO4·H2O） nanorods with typical dimensions of about 10-30 nm in diameter and 300-500 nm in length were prepared by using the soft template method. The effects of using diethylene glycol （DEG） and polyethylene glycol （PEG） polymers as well as the pH values on the size, crystalline structure and morphology of EuPO4·H2O nanorods were investigated. Field emission scanning electron microscopy （FESEM） and X-ray diffraction （XRD） data of the prepared samples were elucidated. The nanorods were highly uniform and their mean length was reduced by using DEG and PEG as soft template agents. For all prepared samples, the rhabdophanetype hexagonal EuPO4·H2O was the dominated phase. The photoluminescence （PL） spectroscopy measurements of EuPO4·H2O nanorods revealed that, under UV excitation, EuPO4·H2O nanorods exhibited strong luminescence with narrow bands corresponding to the intra-4f transitions of ^5D0→^7Fj （j=1, 2, 3, 4） of Eu^3＋ ions. The peaks were found at 594 nm （^5D0→^7F1）, 619 nm （^5D0→^7F2）, 652 nm （^5D0→^7F3）, and 697 nm （^5D0→^7F4）, with the strongest emission at 594 nm.

关键词： soft template method EuPO4·H2O nanorods fluorescence rare earths

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Luminescent and magnetic properties of multifunctional europium(Ⅲ) complex based nanocomposite

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Journal of Rare Earths 2019年第11期37卷 1237-1241页

作者： hoang Thi Khuyen Nguyen Thanh Huong Tran Thu Huong Pham Thi Lien Do Thi anh Thu Nguyen Thi anh Huong Wieslaw Strek le Quoc Minh Institute of Materials Science Vietnam Academy of Science and Technology18 Hoang Quoc VietCau CiayHanoiViet Nam Graduate University of Science and Technology Vietnam Academy of Science and Technology18 Hoang Quoc VietCau GiayHanoiViet Nam Department of Chemistry University of Natural SciencesHanoi National University19 Le Thanh TongHoan KiemHanoiViet Nam Institute of Low Temperature and Structure Research PASOkolna 2Wroclaw 50-422Poland Duy Tan University K7/25 Quang TrungDa DangViet Nam

The luminescent rare earth(RE)complex based multifunctional nanocomposites offer new potential applications of multimodal imaging(magnetic resonance imaging(MRI),fluorescent bioimaging,etc.)that can be associated with therapeutic *** this study,we report some results obtained with novel multifunctional Fe3O4/Si-amine/Eu(NTA)3 nanocomposites that are composed of europium(Ⅲ)complex with 1-(2-naphthoyl)-3,3,3-trifluoroacetone ligands(NTA)(Eu(NTA)3)and superparamagnetic Fe3O4 *** nanocomposites were functionalized with an amine group for biomedicine *** multifunctional Fe3O4/Si-amine/Eu(NTA)3 nanocomposites exhibit both good magnetic behavior of Fe3O4 nanoparticles as a core and strong fluorescent property of europium(Ⅲ)*** characterizations were analyzed by XRD,SEM,EDX and FTIR *** optical properties were studied in detail by UV-VIS spectra and luminescent emission *** magnetic property was estimated by *** effect of concentrations of luminescent Eu(NTA)3 complex on luminescent and magnetic properties is discussed.

关键词： Multifunctional nanocomposite Luminescence Magnetic Europium(Ⅲ)complex Fe3O4 Rare earths

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