检索结果-南通市图书馆

Transport mechanism in chemically reactive hybrid nanofluid flow containing gyrotactic micro-organisms over a curved oscillatory surface

引用

Applied mathematics and mechanics(English Edition) 2025年第1期46卷 177-192页

作者： m.NAVEED m.ImRAN T.ASGHAR Z.ABBAS Department of mathematics Division of Science and TechnologyUniversity of Education Department of mathematics The Islamia University of Bahawalpur

This paper examines the transport analysis, including both heat transfer and mass transfer, in hybrid nanofluid flow containing gyrotactic microorganisms towards a curved oscillatory surface. The influence of magnetic fields is also inspected in terms of their physical characteristics. To depict the phenomena of transport, modified versions of both fick's and fourier's laws are used. Additionally, the characteristics of both heterogeneous and homogeneous chemical reactions are also incorporated. Utilizing a curvilinear coordinate system, the flow problem is formulated as partial differential equations(PDEs)for momentum, concentration, microorganism field, and energy. An analytical solution to the obtained flow equations is achieved utilizing the homotopy analysis method(HAm).The effects of significant flow parameters on the pressure and microorganism fields, velocity, oscillation velocity, concentration, and temperature distributions are shown via graphs. furthermore, the variations in skin friction, mass transfer rate, heat transfer rate, and local motile number due to different involved parameters are presented in tables and are analyzed in detail. Graphical results indicate that the curves of velocity and temperature fields are enhanced as the values of the solid volume fraction variables *** is also verified that the concentration rate field decreases as the values of the homogeneous reaction strength parameter and the radius of curvature parameter increase, and it increases with the Schmidt number and the heterogeneous reaction strength *** outcomes show a favorable response of the motile number to advanced values of the Peclet number, the Schmidt number, the microorganism difference parameter, and the bio-convective Lewis number.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

material selection of polymeric composite automotive bumper beam using analytical hierarchy process

引用

Journal of Central South University 2010年第2期17卷 244-256页

作者： A.HAmBALI S.m.SAPUAN N.ismail Y.NUKmAN Department of mechanical and manufacturing Engineering Universiti Putra Malaysia Department of Engineering Design and manufacture University of Malaya

Selection of materials,as an area of design research,has been under considerable interest over the *** selection is one of the most important activities in the product development *** decision of materials can cause the product to be reproduced or *** avoid this circumstance,one of the useful tools that can be employed in determining the most appropriate material is analytical hierarchy process(AHP).To illustrate the application of AHP,six different types of composite materials were *** most appropriate one for suitability of use in manufacturing automotive bumper beam was determined by considering eight main selection factors and 12 *** AHP analysis reveals that the glass fibre epoxy is the most appropriate material because it has the highest value(25.7%,mass fraction) compared with other *** final material is obtained by performing six different scenarios of the sensitivity *** is proved that glass fibre epoxy is the most optimum decision.

关键词： composite polymer matrix bumper beam analytical hierarchy process

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Brain-penetrating neurotrophic factor mimetics: HER-096 as a disease-modifying therapy for Parkinson’s disease

引用

Neural Regeneration Research 2025年第4期20卷 1094-1095页

作者： Natalia Kulesskaya Kira m.Holmström Henri J.Huttunen Herantis Pharma Plc EspooFinland

Neurotrophic factors as a therapeutic approach in neurodegenerative diseases:A major unmet need in the field of central nervous system diseases is disease-modifying *** for decades there have been various symptomatic treatments available to alleviate the symptoms of the disease,disease-modification,*** that stop,significantly delay,or reverse the progression of the disease,has been turned out to a difficult goal to achieve.

关键词： diseases treatment therapeutic

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effects of Additional HONO Sources on Visibility over the North China Plain

引用

Advances in Atmospheric Sciences 2014年第5期31卷 1221-1232页

作者： LI Ying AN Junling ismail GULTEPE State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric Physics Chinese Academy of Sciences Cloud Physics and Severe Weather Research Section Environment CanadaToronto Ontario M3H 5T4 Canada

The objective of the present study was to better understand the impacts of the additional sources of nitrous acid （HONO） on visibility, which is an aspect not considered in current air quality models. Simulations of HONO contributions to visibility over the North China Plain （NCP） during August 2007 using the fully coupled Weather Research and forecasting/Chemistry （WRf/Chem） model were performed, including three additional HONO sources：（1） the reaction of photo-excited nitrogen dioxide （NO~） with water vapor; （2） the NO2 heterogeneous reaction on aerosol surfaces; and （3） HONO emissions. The model generally reproduced the spatial patterns and diurnal variations of visibility over the NCP well. When the additional HONO sources were included in the simulations, the visibility was occasionally decreased by 20%-30% （3-4 km） in local urban areas of the NCP. monthly-mean concentrations of NO3, NH＋, SO]- and Pm2.5 were increased by 20%-52% （3-11μg m-3）, 10%-38%, 6%-10%, and 6%-11% （9-17 μg m-3）, respectively; and in urban areas, monthly-mean accumulation- mode number concentrations （AmNC） and surface concentrations of aerosols were enhanced by 15%-20% and 10%-20%, respectively. Overall, the results suggest that increases in concentrations of Pm2.5, its hydrophilic components, and AmNC, are key factors for visibility degradation. A proposed conceptual model for the impacts of additional HONO sources on visibility also suggests that visibility estimation should consider the heterogeneous reaction on aerosol surfaces and the enhanced atmospheric oxidation capacity due to additional HONO sources, especially in areas with high mass concentrations of NOx and aerosols.

关键词： HONO visibility aerosols WRf/Chem North China Plain

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

High resolution sequence stratigraphy of the mishrif formation(Cenomanian-Early Turonian)at zubair oilfield(al-rafdhiah dome),southern Iraq

引用

Petroleum Research 2024年第1期9卷 61-71页

作者： Aymen A.Lazim maher J.ismail maher m.mahdi Geoscience Department Zubair Field Operation DivisionBasra Oil CompanyIraq Basrah Oil Company WQ1 FODBasrahIraq University of Basrah College of ScienceGeology Dept.BasrahIraq

The mishrif formation(Cenomanian-E Turonian)is one of the most important geological formations in the middle East and Iraq because it contains enormous petroleum *** is considered to be the first reservoir in the region,and is still being studied because of its economic *** carbonate of the mishrif formation derives from a variety of depositional settings,including mid-ramp,shoal,lagoon,and *** five main microfacies discussed in this paper are wackestone,packstone,grainstone,floatstone,and *** most frequent fossilised components found in the mishrif formation are rudists,benthic foraminifera,echinoderms,burrows molluscs,and *** to the microfacies and analysed wireline log data,the sequence stratigraphy of the studied formation is composed of two regression *** parasequences of transgressive-regressive cycles make up the depositional sequence of the mishrif *** standard depositional environments seem to demonstrate a gradual regression,beginning with a short period of the outer ramp,then a steady period of the mid-ramp,and ending in the intertidal ***,the study recorded two regional maximum flooding surfaces:K-135 and *** former is present in the lowermost part of the formation,while the other lies in the *** study shows a close relationship between facies(environments)and hydrocarbon *** increased accumulation focuses on the lower part of the studied formation,and seems to be lower in the upper part of the formation as a result of changes in the environment of deposition.

关键词： mishrif formation Cenomanian Sequence stratigraphy Zubair oilfield Iraq

来源：

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

Extremal Problems on Components and Loops in Graphs

引用

Acta mathematica Sinica,English Series 2019年第2期35卷 161-171页

作者： Sadik DELEN ismail Naci CANGUL Uludag University Mathematics Department

The authors recently defined a new graph invariant denoted by Ω(G) only in terms of a given degree sequence which is also related to the Euler characteristic. It has many important combinatorial applications in graph theory and gives direct information compared to the better known Euler characteristic on the realizability, connectedness, cyclicness, components, chords, loops etc. many similar classification problems can be solved by means of Ω. All graphs G so that Ω(G) ≤-4 are shown to be disconnected, and if Ω(G) ≥-2, then the graph is potentially connected. It is also shown that if the realization is a connected graph and Ω(G) =-2, then certainly the graph should be a ***, it is shown that if the realization is a connected graph G and Ω(G) ≥ 0, then certainly the graph should be cyclic. Also, when Ω(G) ≤-4, the components of the disconnected graph could not all be cyclic and if all the components of G are cyclic, then Ω(G) ≥ 0. In this paper, we study an extremal problem regarding graphs. We find the maximum number of loops for three possible classes of *** also state a result giving the maximum number of components amongst all possible realizations of a given degree sequence.

关键词： Graph characteristic connectedness cyclic graph acyclic graph degree sequence

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Arctic sea-ice extent: No record minimum in 2023 or recent years

引用

Atmospheric and Oceanic Science Letters 2025年第1期18卷 52-55页

作者： Ola m.Johannessen Tor I.Olaussen Nansen Scientific Society BergenNorway Nansen Environmental and Remote Sensing Center BergenNorway

Arctic sea-ice extent reaches its minimum each year in September. On 11 September 2023 the minimum was 4.969 million square kilometers(***^(2)). This was not a record low, which occurred in 2012, when the minimum was 4.175 ***^(2), 0.794 ***^(2) less than the minimum in 2023. However, the ice extent had decreased by 0.432 ***^(2) compared with 2022. Nevertheless, the summer melting in 2023 was remarkably less than expected when considering the strong heat waves in the atmosphere and ocean, with record temperatures set around the world. In general, there is a high correlation between the long-term decrease in sea-ice extent and the increasing CO_(2) in the atmosphere, where the increase of CO_(2) in recent decades explains about 80% of the decrease in sea ice in September, while the remainder is caused by natural variability.

关键词： Sea ice Arctic minimum ice Climate

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Optimization of aerodynamic efficiency for twist morphing mAV wing

引用

Chinese Journal of Aeronautics 2014年第3期27卷 475-487页

作者： N.I.ismail A.H.Zulkifli m.Z.Abdullah m.Hisyam Basri Norazharuddin Shah Abdullah faculty of mechanical Engineering Universiti Teknologi MARA Shah Alam 40450 Malaysia School of mechanical Engineering Universiti Sains Malaysia Engineering Campus Nibong Tebal 14300 Malaysia School of materials and mineral Resources Engineering Universiti Sains Malaysia Engineering Campus Nibong Tebal 14300Malaysia

Twist morphing （Tm） is a practical control technique in micro air vehicle （mAV） flight. However, Tm wing has a lower aerodynamic efficiency （CL/CD） compared to membrane and rigid wing. This is due to massive drag penalty created on Tm wing, which had overwhelmed the succes- sive increase in its lift generation. Therefore, further CL/CDmax optimization on Tm wing is needed to obtain the optimal condition for the morphing wing configuration. In this paper, two-way fluid- structure interaction （fSI） simulation and wind tunnel testing method are used to solve and study the basic wing aerodynamic performance over （non-optimal） Tm, membrane and rigid wings. Then, a multifidelity data metamodel based design optimization （mBDO） process is adopted based on the Ansys-DesignXplorer frameworks. In the adaptive mBDO process, Kriging metamodel is used to construct the final multifidelity CL/CD responses by utilizing 23 multi-fidelity sample points from the fSI simulation and experimental data. The optimization results show that the optimal Tm wing configuration is able to produce better CL/CDmax magnitude by at least 2% than the non-optimal Tm wings. The flow structure formation reveals that low TV strength on the optimal Tm wing induces low CD generation which in turn improves its overall CL/CDmax performance.

关键词： Aerodynamics fluid structure interaction micro air vehicle Optimization Twist morphing

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Computational aerodynamic analysis on perimeter reinforced(PR)-compliant wing

引用

Chinese Journal of Aeronautics 2013年第5期26卷 1093-1105页

作者： N.I.ismail A.H.Zulkifli m.Z.Abdullah m.Hisyam Basri Norazharuddin Shah Abdullah faculty of mechanical Engineering Universiti Teknologi MARA40450 Shah AlamSelangorMalaysia School of mechanical Engineering Universiti Sains MalaysiaEngineering Campus14300 Nibong TebalPenangMalaysia School of materials and mineral Resources Engineering Universiti Sains MalaysiaEngineering Campus14300 Nibong TebalPenangMalaysia

Abstract Implementing the morphing technique on a micro air vehicle （mAV） wing is a very chal- lenging task, due to the mAWs wing size limitation and the complex morphing mechanism. As a result, understanding aerodynamic characteristics and flow configurations, subject to wing structure deformation of a morphing wing mAV has remained obstructed. Thus, this paper presents the investigation of structural deformation, aerodynamics performance and flow formation on a pro- posed twist morphing mAV wing design named perimeter reinforced （PR）-compliant wing. The numerical simulation of two-way fluid structure interaction （fSI） investigation consist of a quasi- static aeroelastic structural analysis coupled with 3D incompressible Reynolds-averaged Navier- Stokes and shear-stress-transport （RANS-SST） solver utilized throughout this study. Verification of numerical method on a rigid rectangular wing achieves a good correlation with available exper- imental results. A comparative aeroelastic study between PR-compliant to PR and rigid wing per- formance is organized to elucidate the morphing wing performances. Structural deformation results show that PR-compliant wing is able to alter the wing＇s geometric twist characteristic, which has directly influenced both the overall aerodynamic performance and flow structure behavior. Despite the superior lift performance result, PR-compliant wing also suffers from massive drag penalty, which has consequently affected the wing efficiency in general. Based on vortices investigation, the results reveal the connection between these aerodynamic performances with vortices formation on PR-comoliant wing.

关键词： Aerodynamics Aeroelasticity fluid structure interaction micro air vehicle (mAV) morphing wing

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Provably Secure and Efficient Remote Password Authentication Scheme Using Smart Cards

引用

Computers, materials & Continua 2022年第6期71卷 6125-6145页

作者： fairuz Shohaimay Eddie Shahril ismail Department of mathematical Sciences Faculty of Science and TechnologyUniversiti Kebangsaan MalaysiaUKM Bangi43600SelangorMalaysia Department of mathematics Faculty of Computer and Mathematical SciencesUniversiti Teknologi MARA PahangRaub CampusRaub27600PahangMalaysia

Communication technology has advanced dramatically amid the 21st century,increasing the security risk in safeguarding sensitive *** remote password authentication(RPA)scheme is the simplest cryptosystem that serves as the first line of defence against unauthorised entity *** the literature contains numerous RPA schemes,to the best of the authors’knowledge,only few schemes based on the integer factorisation problem(IfP)and the discrete logarithm problem(DLP)that provided a provision for session key agreement to ensure proper mutual ***,none of the previous schemes provided formal security proof using the random oracle ***,this study proposed an improved RPA scheme with session key establishment between user and *** design of the proposed RPA scheme is based on the widely established Dolev-Yao adversary ***,as the main contribution,a novel formal security analysis based on formal definitions of IfP and DLP under the random oracle model was *** proposed scheme’s performance was compared to that of other similar competitive schemes in terms of the transmission/computational cost and time *** findings revealed that the proposed scheme required higher memory storage costs in smart ***,the proposed scheme is more efficient regarding the transmission cost of login and response messages and the total time complexity compared to other scheme of similar security ***,the proposed scheme outperformed the other RPA schemes based on IfP and ***,the potential application of converting the RPA scheme to a user identification(UI)scheme is considered for future *** RPA and UI schemes are similar,the proposed approach can be expanded to develop a provably secure and efficientUI scheme based on IfP and DLP.

关键词： Authentication scheme discrete logarithm factorisation password provable security

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：