检索结果-南通市图书馆

Solute transport and geochemical modeling of the coastal quaternary aquifer, Delta Dahab Basin, South Sinai, Egypt

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Geochimica 2024年第1期43卷 16-39页

作者： Amira Samy mustafa Eissa Seham Shahen moustafa m.said Rabab m.Abou-shahaba Division of Water Resources and Arid Land Department of HydrogeochemistryDesert Research CenterCairoEgypt Egypt Desalination Research Center of Excellence Desert Research CenterCairoEgypt Center for Water Supply Studies S&E-Physical&Environmental SciencesTexas A&M University Corpus ChristiCorpus ChristiUSA Department of Chemistry Faculty of Science(Girls)Al-Azhar UniversityYousef Abbas StrNasr CityP.O.Box:11754CairoEgypt

The wadi dahab delta is in a dry, arid coastal zone within Egypt’s south Sinai Peninsula’s eastern portion. The primary water source is the Quaternary coastal alluvial aquifer. The groundwater salinity varies from 890to 8213 mg/L, with a mean value of 3417 mg/L. The dissolved major ions have been used to calculate the seawater mixing index(SWmI) using a linear equation that discriminates the groundwater mostly affected by water–rock interaction(SWmI 1>) and other samples mixed with Seawater(SWmI mposition of groundwater for specifically chosen groundwater samples ranges from-0.645‰ to +5.212‰ for δ^(18)O and from-9.582‰ to + 22.778‰ for δ^(2)H, where the seawater represented by a Red Sea water sample(δ^(18)O + 1.64‰-δ^(2)H + 9.80‰) and reject brine water are considerably enriched the isotopic groundwater values. The geochemical NETPATH model constrained by the dissolved significant ions, isotopes, and the rock aquifer forming minerals as phases indicate the mixing percent with the seawater ranges from 9% to 97% of seawater from 91% to 3% of original recharge water. According to the SEAWAT 3-D flow models, seawater has penetrated the Northeastern Dahab delta aquifer, with the intrusion zone extending1500 m inland. The salt dissolution, upwelling of saline water, recharge from the upstream mountain block, and seawater encroachment are the primary aspects contributing to the deterioration of groundwater quality. These findings may have significance for effective groundwater withdrawal management in arid locations worldwide with similar hydrogeological systems.

关键词： Groundwater geochemistry Seawater intrusion Solute transport SEAWAT

The 2023 m_(w)6.8 Adassil Earthquake(Chichaoua,morocco)on a steep reverse fault in the deep crust and its geodynamic implications

在线全文

学校读者我要写书评

暂无评论

Earth and Planetary Physics 2024年第3期8卷 522-534页

作者： Billel Touati WangWang Gu SiDao Ni Risheng Chu minHan Sheng QingJie Xue Fouzi Bellalem.said maouche Habibi Yahyaoui School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Geodesy and Earth’s Dynamics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430077China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Centre de Recherche en Astronomie Astrophysique et Géophysique(CRAAG)BP 63BouzaréahAlgiers 16340Algeria Geography and Territory Planning Natural Hazards and Territory Planning LaboratoryBatna 2 UniversityFesdisBatna 05000Algeria

The mw 6.8 Adassil earthquake that occurred in the High Atlas on September 8,2023,was a catastrophic event that provided a rare opportunity to study the mechanics of deep crustal *** research aimed to decipher the rupture characteristics of the Adassil earthquake by analyzing teleseismic waveform data in conjunction with interferometric synthetic aperture radar(InSAR)observations from both ascending and descending *** analysis revealed a reverse fault mechanism with a centroid depth of approximately 28 km,exceeding the typical range for crustal *** result suggests the presence of cooler temperatures in the lower crust,which facilitates the accumulation of tectonic *** earthquake exhibited a steep reverse mechanism,dipping at 70°,accompanied by minor strike-slip *** the geotectonic framework of the High Atlas,known for its volcanic legacy and resulting thermal irregularities,we investigated the potential contributions of these factors to the initiation of the Adassil *** seismicity within the lower crust,away from plate boundaries,calls for extensive research to elucidate its implications for regional seismic hazard *** findings highlight the critical importance of studying and preparing for significant seismic events in similar geological settings,which would provide valuable insights into regional seismic hazard assessments and geodynamic paradigms.

关键词： Adassil earthquake seismogenic fault source depth interferometric synthetic aperture radar(InSAR) seismic waveform joint inversion

Classifying modulations in Communication Intelligence Using Deep Learning Networks

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science and Information 2024年第3期12卷 379-392页

作者： Yahya BENREmDANE said JAmAL Oumaima TAHERI Jawad LAKZIZ said OUASKIT Department of Physics Faculty of Science Ben M'sikUniversity HassanⅡCasablanca 20100Morocco

The present research employs artificial intelligence to come up with an automatic solution for the modulation's classification of various radio signal *** a result,the work we performed involved selecting the database required for supervised deep learning,evaluating the performance of current techniques on unprocessed communication signals,and suggesting a deep learning networkbased method that would enable the classification of modulation types with the best possible ratio between computation time and *** started by examining the automatic classification models that are currently in *** light of the difficulty of forecasting in low Signal Noise Ratio(SNR)situations,we suggested an ensemble learning strategy based on adjusted Res Net and Transformer Neural Network,which is effective at extracting multi-scale features from the raw I/Q sequence ***,we produced an architecture that is simple to use and apply to communication *** architecture of this solution is strong and optimal,enabling it to determine the type of modulation with up to 95%accuracy automatically.

关键词： automatic modulation classification artificial intelligence deep learning radio frequency electronicwarfare

Comparison of ERA5 turbulent fluxes at the air-sea interface with measurements from a wave-following platform

在线全文

学校读者我要写书评

暂无评论

Atmospheric and Oceanic Science Letters 2024年第3期17卷 32-36页

作者： said Benjeddou Denis Bourras Christopher Luneau Aix marseille Universite National Center for Scientific ResearchMediterranean Institute of OceanographyMarseilleFrance Observatory of the Sciences of the Universe Pytheas Institute National Center for Scientific ResearchMarseilleFrance

Turbulent fluxes at the air-sea interface were estimated with data collected in 2011-2020 with a low-profile platform named OCARINA during eight experiments in five regions:2011,2015,and 2016 in the Iroise Sea;2012 in the tropical Atlantic;2014 in the Chilie-Peru upwelling;2017 and 2018 in the mediterranean Sea,and 2018 and 2020 in *** observations were carried out with moderate winds(2-10 m s^(-1))and average wave heights of 1.5 *** this study,the authors used the fluxes calculated by the bulk method using OCARINA-sampled data as the *** data can validate the fluxes estimated from ERAS reanalysis *** OCARINA and ERA5 data were taken *** do this,the authors established an algorithm to extract the OCARINA data as closely as possible to the reanalysis data in time and *** measurements of the OCARINA platform can conclude on the relevance of the widely used reanalysis data.

关键词： Ocarina ECmWF ERA5 Turbulent fluxes Louis formulation

mapping lineaments using Landsat 8 OLI and SRTm data;a case study of the eastern part of the Ouarzazate Basin,morocco

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of mountain Science 2024年第3期21卷 987-1003页

作者： mOUJANE said ALGOUTI Ahmed ALGOUTI Abdellah FARAH Abdelouahed ABOULFARAJ Abdelfatah NAFOURI Imane Geoscience Geotourism Natural Hazards and Remote Sensing Laboratory(2GRNT) Department of GeologyFaculty of Sciences SemlaliaUniversity of Cadi AyyadBP 239040000MarrakechMorocco

The integration of remote sensing and geographic information system(GIS)was employed in this study to delineate the structural lineaments within the eastern section of the Ouarzazate Basin,situated between the southern front of the Central High Atlas and the northern slopes of the Eastern Anti-Atlas(also known as the Saghro massif).To achieve this objective,Landsat 8 Operational Land Imager(OLI)and Shuttle Radar Topography mission(SRTm)data were *** Component Analysis(PCA)was computed and a directional filter was applied to the first PCA and the panchromatic band(B8).Additionally,shading was applied to the SRTm data in four directions;N0°,N45°,N90°,N135°.After removing of the non-geological linear structures,the results obtained,using the automatic extraction method,allowed us to produce a synthetic map that included 1251 lineaments with an average length of 1331 m and was dominated by NE-SW,ENE-WSW and E-W directions,***,the high lineament density is clearly noted in the Anti-Atlas(Saghro massif)and at the level of the northern part,extending from the Ait Ibrirne to Arg-Ali Oubourk *** lineament density can always be found around the major faults affecting this *** data collected during the field investigations and from geological maps show that the major direction of the faults and structural accidents range mostly between N45°,N70°and N75°.The correlation of remote sensing results with those collected in the field shows a similarity and coincidence with each *** these results,it is possible to consider the automatic extraction method as a supplementary kind that can serve classical geology by quickly enriching it with additional *** shown in this work,this method provides more information when applied in arid areas where the fields are well outcropped.

关键词： Remote sensing GIS Landsat 8 OLI SRTm Ouarzazate Basin Central High Atlas

Rao Algorithms-Based Structure Optimization for Heterogeneous Wireless Sensor Networks

在线全文

学校读者我要写书评

暂无评论

Computers, materials & Continua 2024年第1期78卷 873-897页

作者： Shereen K.Refaay samia A.Ali moumen T.El-melegy Louai A.maghrabi Hamdy H.El-Sayed Faculty of Computers and Artificial Intelligence Sohag UniversitySohag82524Egypt Faculty of Engineering Assiut UniversityAssiut711745Egypt College of Engineering University of Business and TechnologyJeddah23411Saudi Arabia

The structural optimization of wireless sensor networks is a critical issue because it impacts energy consumption and hence the network’s *** studies have been conducted for homogeneous networks,but few have been performed for heterogeneouswireless sensor *** paper utilizes Rao algorithms to optimize the structure of heterogeneous wireless sensor networks according to node locations and their initial *** proposed algorithms lack algorithm-specific parameters and metaphorical *** proposed algorithms examine the search space based on the relations of the population with the best,worst,and randomly assigned *** proposed algorithms can be evaluated using any routing protocol,however,we have chosen the well-known routing protocols in the literature:Low Energy Adaptive Clustering Hierarchy(LEACH),Power-Efficient Gathering in Sensor Information Systems(PEAGSIS),Partitioned-based Energy-efficient LEACH(PE-LEACH),and the Power-Efficient Gathering in Sensor Information Systems Neural Network(PEAGSIS-NN)recent routing *** compare our optimized method with the Jaya,the Particle Swarm Optimization-based Energy Efficient Clustering(PSO-EEC)protocol,and the hybrid Harmony Search Algorithm and PSO(HSA-PSO)*** efficiencies of our proposed algorithms are evaluated by conducting experiments in terms of the network lifetime(first dead node,half dead nodes,and last dead node),energy consumption,packets to cluster head,and packets to the base *** experimental results were compared with those obtained using the Jaya optimization *** proposed algorithms exhibited the best *** proposed approach successfully prolongs the network lifetime by 71% for the PEAGSIS protocol,51% for the LEACH protocol,10% for the PE-LEACH protocol,and 73% for the PEGSIS-NN protocol;moreover,it enhances other criteria such as energy conservation,fitness convergence,packets to cluster head,and packets to the base sta

关键词： Wireless sensor networks Rao algorithms optimization LEACH PEAGSIS

Tie-line Power Flow Control method for Gridconnected microgrids with SmES Based on Optimization and Fuzzy Logic

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of modern Power Systems and Clean Energy 2020年第5期8卷 941-950页

作者： Sayed m.said Abdelfatah Ali Bálint Hartmann Department of Electrical Engineering Aswan University81542 AswanEgypt Department of Electric Power Engineering Budapest University of Technology and Economics1111 BudapestHungary Department of Electrical Engineering South Valley University83523 QenaEgypt

In an active distribution grid,renewable energy sources(RESs)such as photovoltaic(PV)and energy storage systems(e.g.,superconducting magnetic energy storage(SmES))can be combined with consumers to compose a microgrid(mG).The high penetration of PV causes high fluctuations of tie-line power flow and highly affects power system *** can lead to several technical problems such as voltage fluctuations and excessive power *** this paper,a fuzzy logic control based SmES method(FSm)and an optimized fuzzy logic control based SmES method(OFSm)are proposed for minimizing the tie-line power ***,the fluctuations and transmission power losses are *** FSm,SmES is used with a robust fuzzy logic controller(FLC)for controlling the tie-line power *** optimization model is employed in OFSm to simultaneously optimize the input parameters of the FLC and the reactive power of the voltage source converter(VSC)of *** objective function of minimizing the tieline power flow is incorporated into the optimization *** swarm optimization(PSO)algorithm is utilized to solve the optimization problem while the constraints of the utility power grid,VSC,and SmES are *** simulation results demonstrate the effectiveness and robustness of the proposed methods.

关键词： Utility power grid microgrid photovoltaic(PV) superconducting magnetic energy storage(SmES) tie-line power fuzzy logic control(FLC)

沉默大豆GmATG5加速叶片衰老并增强大豆抗病性

在线全文

学校读者我要写书评

暂无评论

生物工程学报 2024年第4期40卷 1065-1075页

作者： said m.Hashimi 黄敏君陈宇刘建中浙江师范大学生命科学学院浙江金华321004 浙江师范大学生命科学学院遗传与发育生物学研究所浙江金华321004 浙江师范大学生命科学学院浙江省特色经济植物生物技术重点实验室浙江金华321004

自噬在生物体细胞内物质循环利用及适应各种胁迫方面起着重要作用。然而,对大豆自噬途径的研究鲜有报道。本研究利用大豆豆荚斑驳病毒(bean pod mottle virus,BPmV)介导的基因沉默技术,对大豆自噬相关基因5(autophagy-related gene 5,AT... 详细信息

自噬在生物体细胞内物质循环利用及适应各种胁迫方面起着重要作用。然而,对大豆自噬途径的研究鲜有报道。本研究利用大豆豆荚斑驳病毒(bean pod mottle virus,BPmV)介导的基因沉默技术,对大豆自噬相关基因5(autophagy-related gene 5,ATG5)同源基因进行沉默。结果发现,经暗处理的GmATG5沉默植株叶片上积累过量的ATG8蛋白,说明自噬降解途径受损;与自噬途径受损相一致,暗处理的GmATG5沉默植株叶片出现明显的衰老加速的表型;另外,GmATG5沉默植株叶片中活性氧(reactive oxygen species,ROS)的积累量以及水杨酸含量显著增加,说明沉默GmATG5激活了免疫反应;抗病性分析表明,GmATG5沉默植株对大豆斑点病菌(Pseudomonas syringae ***,Psg)的抗性较空载体对照植株显著增强,但该抗病性的增强并不依赖于丝裂原活化蛋白激酶(mitogen-activated protein kinase,mAPK)途径的激活。

关键词：自噬病毒诱导的基因沉默免疫反应丝裂原活化蛋白激酶(mAPK)

Preparation of Fe-As alloys by mechanical alloying and vacuum hot-pressed sintering:microstructure evolution,mechanical properties,and mechanisms

在线全文

学校读者我要写书评

暂无评论

Rare metals 2024年第8期43卷 3876-3892页

作者： Fei Chai Fei-Ping Zhao Zhan Hu Shi-Yi Wen Ben-Hammouda samia Ze-Lin Fu Xin-Ting Lai Yan-Jie Liang Xiao-Bo min Li-Yuan Chai School of metallurgy and Environment Central South UniversityChangsha 410083China Chinese National Engineering Research Center for Control&Treatment of Heavy metal Pollution Institute of Environmental EngineeringCentral South UniversityChangsha 410083HunanChin State Key Laboratory of Powder metallurgy Central South UniversityChangsha 410083China Department of Building Civiland Environmental EngineeringConcordia UniversityMontreal H3G 1M8Canada

Arsenic materials have attracted great attention due to their unique ***,research concerning iron-arsenic(Fe-As) alloys is very scarce due to the volatility of As at low temperature and the high melting point of ***,a new Fe-As alloy was obtained by mechanical alloying(mA) followed by vacuum hot-pressed sintering(VHPS).moreover,a systematic study was carried out on the microstructural evolution,phase composition,leaching toxicity of As,and physical and mechanical properties of Fe-As alloys with varying weight fractions of As(20%,25%,30%,35%,45%,55%,65%,and 75%).The results showed that pre-alloyed metallic powders(PAmPs) have a fine grain size and specific supersaturated solid solution after mA,which could effectively improve the mechanical properties of Fe-As alloys by VHPS.A high density(> 7.350 g·cm^(-3)),low toxicity,and excellent mechanical properties could be obtained for FeAs alloys sintered via VHPS by adding an appropriate amount of As,which is more valuable than commercial Fe-As *** Fe-25% As alloy with low toxicity and a relatively high density(7.635 g·cm^(-3)) provides an ultra-high compressive strength(1989.19 mPa),while the Fe-65% As alloy owns the maximum Vickers hardness(HVo.5 899.41).After leaching by the toxicity characteristic leaching procedure(TCLP),these alloys could still maintain good mechanical performance,and the strengthening mechanisms of Fe-As alloys before and after leaching were *** in the grain size,micro structure,and phase distribution induced significant differences in the compressive strength and hardness.

关键词： mechanical alloying Vacuum hot-pressed sintering High-pressure Arsenic-iron alloys mechanical properties