检索结果-南通市图书馆

Comprehensive isotopic characterization of the hydrological processes of the Indus river basin(IRB):A comparison between Upper Indus Basin(UIB)and Lower Indus Basin(LIB)

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 2023年第3期20卷 705-723页

作者： akhtar JAHAN tanveer DAR Sudhir KUMAR Nachiketa RAI Department of Earth Sciences Indian Institute of TechnologyRoorkee 247667India National Institute of Hydrology Roorkee 247667India

The Indus river basin(IRB)is one of the most depleted water basins globally,having significant challenges for its water *** of stable isotope composition(δ^(18)O and δ^(2)H)across IRB is a critical aspect that can provide deeper insights for investigating complex hydrological *** work analyses the spatial pattern of the isotopic signature using a comprehensive compilation of available datasets of the Global Network of Isotopes in River(GNIR)and Global Network of Isotopes in Precipitation(GNIP),along with the previously published isotopic studies in the Indus ***,this work provides a detailed comparison of the isotopic signature of the Upper Indus Basin(UIB),and Lower Indus Basin(LIB).The IRBs waterline was found to beδ^(2)H=7.89×δ^(18)O+13.51,which shows a close similarity with the Global Meteoric Water Line(GMWL),indicating the meteoric origin of the water with insignificant secondary evaporation prevailing across the *** Main Indus Channel(MIC)river water line(δ^(2)H=8.88×δ^(18)O+26.05)indicates a major contribution from the meteoric origin(precipitation/rain)of water with minimal effect of evaporation *** water line for UIB samples,(δ^(2)H=7.88×δ^(18)O+11.94)was found to be moderately higher in slope than LIB samples(δ^(2)H=7.17×δ^(18)O+7.16).However,the slopes of both UIB and LIB river water lines closely approached the slope of GMWL and were consistent with the slope of IRB water line,which indicates similarity in contribution of water *** higher slope and intercept in UIB suggest that meteoric water sources contributed to streamflow *** snow/glacier with insignificant evapotranspiration,which is also validated by the scarce vegetation cover in the ***,the lower slope and intercept in LIB suggest stream water contribution from significantly evaporated groundwater and precipitation with a complete homogenization of discharge coming from the *** substantiate that distinct isotopi

关键词： Isotopes Spatial variability Indian summer monsoon Western Disturbance Indus river Water

Gene expression pattern of K transporter GhHAK5 gene of potassium efficient and in-efficient cotton cultivars based on morphological physiognomies as affected by potassium nutrition and reduced irrigation

在线全文

学校读者我要写书评

暂无评论

Journal of Cotton Research 2023年第3期6卷 166-185页

作者： akhtar Muhammad Naeem HAQ tanveer ul akhtar Muhammad Waseem ABBASS Ghulam Pesticide Quality Control Laboratory Multan Under Agriculture Research Punjab/Government of Punjab Department of AgricultureMultanPakistan Department of Soil and Environmental Sciences MNS-University of AgricultureMultanPakistan Department of Seed Science and Technology University of Agriculture FaisalabadFaisalabadPakistan

Background Under K deficiency the uptake and distribution pattern in plant cells is mediated through different transport proteins and channels which were controlled by specific gene ***,a hydroponic experiment was conducted under control condition for testing the gene expression pattern of the K transporter under adequate and low K supply *** that,a 2-year field experiment was conducted to evaluate five selected cotton cultivars(four K-efficient cultivars,viz.,CIM-554,CYTO-124,FH-142,IUB-2013,and one K non-efficient,BH-212) screened from the initial hydroponics culture experiment and two levels of potassium(0 K_(2)O kg·ha^(-1) and 50 K_(2)O kg·ha^(-1)) were tested under reduced irrigation(50% available water content;50 AWC) and normal irrigation conditions(100% available water content;100 AWC).Result Results revealed that the transcript levels of GhHAK5aD in roots were significantly higher in K^(+) efficient cultivars than that in K^(+) non-efficient *** GhHAK5aD expression upon K^(+) deficiency was higher in roots but lower in shoots,indicating that GhHAK5aD could have a role in K^(+) uptake in roots,instead of transport of K^(+) from root to ***,under field conditions the cultivar FH-142 showed an increase of 22.3%,4.9%,2.4%,and 1.4% as compared with BH-212,IUB-2013,CYTO-124,and CIM-554,respectively,in seed cotton yield(SCY) with K application under reduced irrigation *** applied K,the FH-142 showed an increase in net photosynthetic rate by 57.3% as compared with the rest of the cultivars under reduced irrigation over K ***,the overall performance indicators of K-efficient cultivars like FH-142,CYTO-124,CIM-554,and IUB-2013 were better than BH-212(K in-efficient) under reduced irrigation conditions with applied K at 50 kg·ha^(-1).Fiber quality trait improved significantly with K application under water *** increase in micronaire was 3.6%,4.7%,7.8%,3.4%,and 6.7% in BH-212,IUB-2013,CIM-554,C

关键词： Cotton K-efficient cultivars Drought Potassium use efficiency WUE

同方期刊数据库

Variable viscosity in peristalsis of Sisko fluid

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2018年第4期39卷 501-512页

作者： A.tanveer T.HAYAT A.ALSAEDI Department of Mathematics Quaid-i-Azam University Nonlinear Analysis and Applied Mathematics (NAAM) Research Group Department of Mathematics Faculty of Science King Abdulaziz University

This paper aims to examine variable viscosity effects on peristalsis of Sisko fluids in a curved channel with compliant characteristics. Viscous dissipation in a heat transfer is studied. The resulting problems are solved using perturbation and numerical schemes to show qualitatively similar responses for velocity and temperature. A streamline phenomenon is also considered.

关键词： peristalsis Sisko fluid curved channel numerical and perturbation solution wall property viscous dissipation

A Comparative Study of Pollutant Removal Stability in Hybrid Wetland Columns

在线全文

学校读者我要写书评

暂无评论

湿地科学 2012年第2期10卷 142-148页

作者： tanveer Ferdous Saeed Guangzhi Sun Department of Civil Engineering Ahsanullah University of Science and Technology Dhaka 1208 Bangladesh Department of Civil Engineering Building 60 Monash University Clayton Victoria 3800 Australia Department of Chemical Engineering James Cook University Townsville Queensland 4811 Australia

This study investigated the effects of two alternative substrates(wood mulch and zeolite) on the performance of three laboratory-scale hybrid wetland systems that had identical system components and *** system consisted of a vertical flow(VF) wetland column,followed by a horizontal flow(HF) column and a vertical flow *** substrates employed were wood mulch,gravel and zeolite,and Phragmites australis were planted in each *** systems received synthetic wastewater,with pollutant loadings in the range of 8.5-38.0 g/(m2·d) total nitrogen(TN) and 4.0-46.4 g/(m2·d) biological oxygen demand(BOD5).Wood mulch and zeolite substrates showed higher efficiencies in terms of removing nitrogenous compounds and biodegradable *** supply of organic carbon from the organic mulch substrates enhanced denitrification,while adsorption of influent ammoniacal nitrogen(NH4-N) in zeolite played a major role in the removal of nitrogenous species in the wetland ***,the average percentage removals of TN and BOD5 reached >66% and >96% respectively,indicating stable performances by the hybrid wetland systems under the experimental loading *** models were developed,based on the combination of Monod kinetics and continuously-stirred tank reactor(CSTR) flow patterns to describe the degradation of nitrogenous *** by the models closely matched the experimental data,indicating the validity and potential application of Monod kinetics in the modelling and design of treatment wetlands.

关键词：摘要编辑部编辑工作读者

On Nearly σ-Embedded Subgroups of Finite Groups

在线全文

学校读者我要写书评

暂无评论

Algebra Colloquium 2019年第4期26卷 677-688页

作者： Muhammad tanveer Hussain Chenchen Cao Li Zhang AAIvanov School of Mathematical Sciences University of Science and Technology of China Hefei 230026China School of Mathematics and Statistics Ningbo University NingboZhejiang 315211China Department of Mathematics and Physics Anhui Jianzhu University Hefei 230022China 不详

Let G be a finite group,σ={σi|i∈ I}be some partition of the set of all primes and σ(G)={(σi|σi∩ π(G)≠0}.We say that a subgroup H of G is nearly cr-cmbcdded in G if there exists a cr-permutable subgroup T of G... 详细信息

关键词： finite group cr-permutable subgroup cr-permutably embedded subgroup nearly cr-embedded subgroup supersoluble group

Metallized siligraphene nanosheets （SiC7） as high capacity hydrogen storage materials

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2018年第7期11卷 3802-3813页

作者： Syeda R. Naqvi tanveer Hussain Wei Luo Rajeev Ahuja Condensed Matter Theory Group Department of Physics and Astronomy Box 516 Uppsala University S-75120 Uppsala Sweden Applied Materials Physics Department of Materials and Engineering Royal Institute of Technology (ICFH) S-10044 Stockholm Sweden Centre for Theoretical and Computational Molecular Science Australian Institute for Bioengineering and Nanotechnology The University of Queensland Brisbane Old 4072 Australia

A planar honeycomb monolayer of siligraphene （SIC7） could be a prospective medium for clean energy storage due to its light weight, and its remarkable mechanical and unique electronic properties. By employing van der Waals- induced first principles calculations based on density functional theory （DFT）, we have explored the structural, electronic, and hydrogen （H2） storage characteristics of SiC7 sheets decorated with various light metals. The binding energies of lithium （Li）, sodium （Na）, potassium （K）, magnesium （Mg）, calcium （Ca）, scandium （Sc）, and titanium （Ti） dopants on a SiC7 monolayer were studied at various doping concentrations, and found to be strong enough to counteract the metal clustering effect. We further verified the stabilities of the metallized SiC7 sheets at room temperature using ab initio molecular dynamics （MD） simulations. Bader charge analysis revealed that upon adsorption, due to the difference in electronegativity, all the metal adatorns donated a fraction of their electronic charges to the SiC7 sheet. Each partially charged metal center on the SiC7 sheets could bind a maximum of 4 to 5 H2 molecules. A high H2 gravimetric density was achieved for several dopants at a doping concentration of 12.50%. The H2 binding energies were found to fall within the ideal range of 0.2-0.6 eV. Based on these findings, we propose that metal-doped SiC7 sheets can operate as efficient H2 storage media under ambient conditions.

关键词： dean energy functionalization binding characteristics dopants

Reinforcement Learning-Based Optimization for Drone Mobility in 5G and Beyond Ultra-Dense Networks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2021年第9期68卷 3807-3823页

作者： Jawad tanveer Amir Haider Rashid Ali Ajung Kim School of Optical Engineering Sejong UniversitySeoul05006Korea School of Intelligent Mechatronics Engineering Sejong UniversitySeoul05006Korea

Drone applications in 5th generation(5G)networks mainly focus on services and use cases such as providing connectivity during crowded events,human-instigated disasters,unmanned aerial vehicle traffic management,internet of things in the sky,and situation awareness.4G and 5G cellular networks face various challenges to ensure dynamic control and safe mobility of the drone when it is tasked with delivering these *** drone can fly in three-dimensional *** drone connectivity can suffer from increased handover cost due to several reasons,including variations in the received signal strength indicator,co-channel interference offered to the drone by neighboring cells,and abrupt drop in lobe edge signals due to antenna *** baseline greedy handover algorithm only ensures the strongest connection between the drone and small cells so that the drone may experience several *** for fast environment learning,machine learning techniques such as Q-learning help the drone fly with minimum handover cost along with robust *** this study,we propose a Q-learning-based approach evaluated in three different *** handover decision is optimized gradually using Q-learning to provide efficient mobility support with high data rate in time-sensitive applications,tactile internet,and haptics *** results demonstrate that the proposed algorithm can effectively minimize the handover cost in a learning *** work presents a notable contribution to determine the optimal route of drones for researchers who are exploring UAV use cases in cellular networks where a large testing site comprised of several cells with multiple UAVs is under consideration.

关键词： 5G dense network small cells mobility management reinforcement learning performance evaluation handover management

Moirépatterns arising from bilayer graphone/graphene superlattice

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2020年第4期13卷 1060-1064页

作者： Hu Li Raffaello Papadakis tanveer Hussain Amir Karton Jiangwei Liu Key Laboratory of High Efficiency and Clean Mechanical Manufacture School of Mechanical EngineeringShandong UniversityJinan 250061China School of Electrical and Electronic Engineering University of ManchesterM139PL ManchesterUK Department of Chemistry Angstrdm LaboratoryUppsala University75121 UppsalaSweden School of Molecular Sciences University of Western AustraliaWA6009 PerthAustralia

Moirépatterns from two-dimensional(2D)graphene heterostructures assembled via van der Waals interactions have sparked considerable interests in physics with the purpose to tailor the electronic properties of *** we report for the first time the observation of moire patterns arising from a bilayer graphone/graphene superlattice produced through direct single-sided hydrogenation of a bilayer graphene on *** to pristine graphene,the bilayer superlattice exhibits a rippled surface and two types of moire patterns are observed:triangular and linear moire patterns with the periodicities of 11 nm and 8-9 nm,*** moire patterns are revealed from atomic force microscopy and further confirmed by following fast Fourier transform(FFT)*** functional theory(DFT)calculations are also performed and the optimized lattice constants of bilayer superlattice heterostructure are in line with our experimental *** findings show that well-defined triangular and linear periodic potentials can be introduced into the graphene system through the single-sided hydrogenation and also open a route towards the tailoring of electronic properties of graphene by various moirépotentials.

关键词： Moire patterns graphone/graphene superlattice atomic force microscopy triangular pattern linear pattern

Pollutant removal from municipal wastewater employing baffled subsurface flow and integrated surface flow-floating treatment wetlands

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 Environmental Sciences 2014年第4期26卷 726-736页

作者： tanveer Saeed Abdullah Al-Muyeed Rumana Afrin Habibur Rahman Guangzhi Sun Department of Civil Engineering Ahsanullah University of Science and Technology Department of Civil Engineering Bangladesh University of Engineering and Technology School of Engineering and Physical Sciences James Cook University

This article reports pollutant removal performances of baffled subsurface flow, and integrated surface flow-floating treatment wetland units, when arranged in series for the treatment of municipal wastewater in Bangladesh. The wetland units （of the hybrid system） included organic, inorganic media, and were planted with nineteen types of macrophytes. The wetland train was operated under hydraulic loading fluctuation and seasonal variation. The performance analyses （across the wetland units） illustrated simultaneous denitrification and organics removal rates in the first stage vertical flow wetland, due to organic carbon leaching from the employed organic media. Higher mean organics removal rates （656.0 g COD]（***）） did not completely inhibit nitrification in the first stage vertical flow system; such pattern could be linked to effective utilization of the trapped oxygen, as the flow was directed throughout the media by the baffle walls. Second stage horizontal flow wetland showed enhanced biodegradable organics removal, which depleted organic carbon availability for denitrification. The final stage integrated wetland system allowed further nitrogen removal from wastewater, via nutrient uptake by plant roots （along with nitrification）, and generation of organic carbon （by the dead macrophytes） to support denitrification. The system achieved higher E. coli mortality through protozoa predation, E. coli oxidation, and destruction by UV radiation. In general, enhanced pollutant removal efflciencies as demonstrated by the structurally modified hybrid wetland system signify the necessity of such modification, when operated under adverse conditions such as： substantial input organics loading, hydraulic loading fluctuation, and seasonal variation.

关键词： constructed wetlands loading fluctuation media nitrogen organics seasonal variation