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An authentication and plausibility model for big data analytic under LOS and NLOS conditions in 5G-VANET

Science China(Information Sciences) 2020年第12期63卷 67-83页

作者： S.A.SOLEYmANI m.H.ANISI A.Hanan ABDULLAH m.Asri NGADI Sh.GOUDARZI m.khurram khan m.Nazri KAmA School of Computing Faculty of Engineering Universiti Teknologi Malaysia (UTM) School of Computer Science and Electronic Engineering University of Essex Centre of Artificial Intelligence National University of Malaysia (UKM) Center of Excellence in Information Assurance (CoEIA) King Saud University Advanced Informatics School Menara Razak Universiti Teknologi Malaysia (UTM)

The exchange of correct and reliable data among legitimate nodes is one of the most important challenges in vehicular ad hoc networks(VANETs). malicious nodes and obstacles, by generating inaccurate information, have a negative impact on the security of 5G-VANET. The big data generated in the vehicular network is also an issue in the security of VANET. To this end, a security model based on authentication and plausibility is proposed to improve the safety of network named ‘AFPm’. In the first layer, an authentication mechanism using edge nodes along with 5G is proposed to deal with the illegitimate nodes who enter the network and broadcast wrong information. In the authentication mechanism, because of the growth of the connected vehicles to the edge nodes that lead to generating big data and hence the inappropriateness of the traditional data structures, cuckoo filter, as a space-efficient probabilistic data structure, is used. In the second layer, a plausibility model by performing fuzzy logic is presented to cope with inaccurate information. The plausibility model is based on detection of inconsistent data involved in the event message. The plausibility model not only tackles with inaccurate, incomplete, and inaccuracy data but also deals with misbehaviour nodes under both line-of-sight(LOS) and non-line-of-sight(NLOS) conditions. All obtained results are validated through well-known evaluation measures such as F-measure and communication overhead. The results presented in this paper demonstrate that the proposed security model possesses a better performance in comparison with the existing studies.

关键词： authentication plausibility fuzzy logic cuckoo filter 5G-VANET big data

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A hyperspectral unmixing approach for ink mismatch detection in unbalanced clusters

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Journal of Information and Intelligence 2024年第2期2卷 177-190页

作者： Faryal Aurooj Nasir Salman Liaquat khurram Khurshid Nor muzlifah mahyuddin Department of Electrical Engineering Institute of Space TechnologyIslamabad 44000Pakistan School of Electrical and Electronic Engineering Universiti Sains MalaysiaPenang 14300Malaysia

With the rapid development of location-based services and online social networks,POI recommendation services considering geographic and social factors have received extensive ***,the vigorous development of cloud computing has prompted service providers to outsource data to the cloud to provide POI recommendation ***,there is a degree of distrust of the cloud by service *** protect digital assets,service providers encrypt data before outsourcing ***,encryption reduces data availability,making it more challenging to provide POI recommendation services in outsourcing *** privacy-preserving schemes for geo-social-based POI recommendation have been presented,but they have some limitations in supporting group query,considering both geographic and social factors,and query accuracy,making these schemes *** solve this issue,we propose two practical and privacy-preserving geo-social-based POI recommendation schemes for single user and group users,which are named GSPR-S and ***,we first utilize the quad tree to organize geographic data and the minHash method to index social ***,we apply BGV fully homomorphic encryption to design some private algorithms,including a private max/min operation algorithm,a private rectangular set operation algorithm,and a private rectangular overlapping detection *** that,we use these algorithms as building blocks in our schemes for efficiency *** to security analysis,our schemes are proven to be secure against the honest-but-curious cloud servers,and experimental results show that our schemes have good performance.

关键词： k-means clustering Gaussian mixture model(Gmm) Hyper spectral imaging(HSI) iVision handwritten hyperspectral images dataset(HHID) Document forensics

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基于三线DFT的航空电源频率实时检测算法

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电工技术学报 2012年第10期27卷 190-195,214页

作者：肖鲲王莉娜 m.khurram Shahzad 北京航空航天大学自动化科学与电气工程学院北京100191

针对航空变频电源的频率(360～800Hz)检测,提出了一种基于三线离散傅里叶变换(DFT)的实时检测算法。首先对采样序列加汉宁窗,通过DFT计算基波频率主瓣区域的离散谱线幅值,推导出基波频率与3条离散谱线幅值的数值关系。其次结合电力系统... 详细信息

针对航空变频电源的频率(360～800Hz)检测,提出了一种基于三线离散傅里叶变换(DFT)的实时检测算法。首先对采样序列加汉宁窗,通过DFT计算基波频率主瓣区域的离散谱线幅值,推导出基波频率与3条离散谱线幅值的数值关系。其次结合电力系统的基波和谐波特点,分析了该算法无主瓣频谱泄露的采样点数选择方法;采用旋转坐标法计算离散谱线幅值,使三线DFT计算量得以显著减小;通过迭代法估计频率初值,对航空电源宽范围连续变化值进行检测,克服栅栏效应。仿真和实验结果表明,该算法具有良好的实时性,阶跃响应好,稳态精度高。

关键词：频率检测离散傅里叶变换汉宁窗频谱分析

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mHD flow study of viscous fluid through a complex wavy curved surface due to biomimetic propulsion under porosity and second-order slip effects

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Communications in Theoretical Physics 2021年第8期73卷 1-17页

作者： Pei-Ying Xiong khurram Javid mohsin Raza Sami Ullah khan m Ijaz khan Yu-ming Chu College of Science Hunan City UniversityYiyang 413000China Department of mathematics Northern UniversityWattar-Walai ZiaratKaka Saib Road24110NowsheraKPKPakistan Department of mathematics COMSATS University IslamabadSahiwal 57000Pakistan Department of mathematics and Statistics Riphah International University 1-14Islamabad 44000Pakistan Department of mathematics Huzhou UniversityHuzhou 313000China

The steady laminar flow of viscous fluid from a curved porous domain under a radial magnetic field is *** fluid flow by a curved domain is due to peristaltic waves present at the boundary *** whole analysis is based on porosity(Darcy number)***,the effects of second-order slip on the rheology analysis are also *** to the complex nature of the flow regime,we have governed the rheological equations by using curvilinear coordinates in the fixed *** physical influence of magnetic(Hartmann number)and porosity(Darcy number)parameters on the rheological features of peristaltic transportation are argued in detailed(in the wave frame).Additionally,in the current study,the complex wavy pattern on both boundary walls of the channel is *** whole rheological study is based on ancient,but medically valid,assumptions of creeping phenomena and long wavelength *** solutions of the governing equations are obtained by using the simple integration technique in mathematica software *** core motivation of the present analysis is to perceive the physical influence of embedded parameters,such as the dimensionless radius of the curvature parameter,magnetic parameter,porosity parameter,different amplitude ratios of complex peristaltic waves,first-and second-order slip parameters,on the axial velocity,pressure gradient,local wall shear stress,tangential component of the extra-stress tensor,pumping and trapping phenomena.

关键词： peristaltic waves magnetic field porous medium pumping phenomena second-order slip condition

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Cayley Picture Fuzzy Graphs and Interconnected Networks

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Intelligent Automation & Soft Computing 2023年第3期35卷 3317-3330页

作者： Waheed Ahmad khan khurram Faiz Abdelghani Taouti Department of mathematics University of Education LahoreAttock campusPakistan ETS-maths and NS Engineering Division HCTUniversity CitySharjahUnited Arab Emirates

Theory of the Cayley graphs is directly linked with the group ***,if there are uncertainties on the vertices or edges or both then fuzzy graphs have an extraordinary *** this perspective,numbers of generalηizations of fuzzy graphs have been explored in the *** the others,picture fuzzy graph(PFG)has its own importance.A picture fuzzy graph(PFG)is a pair G=(C,D)defined on a H^(*)=(A,B),where C=(ηC,θ_(C),■_(C))is a picture fuzzy set on A and D=(ηD,θ_(D),■_(D))is a picture fuzzy set over the set B∈A×A such that for any edge mn∈ B with ηD(m,n)≤min(ηC(m),ηC(n)),θD(m,n)≤min(θC(m),θC(n))and ■_(D)(m,n)≥max(■_(C)(m),■_(C)(n)).In this manuscript,we introduce the notion of the Cayley picture fuzzy graphs on groups which is the generalization of the picture fuzzy ***,we discuss few important characteristics of the Cayley picture fuzzy *** show that Cayley picture fuzzy graphs are vertex transitive and hence ***,we investigate different types of Cayley graphs induced by the Cayley picture fuzzy graphs by using different types of *** extensively discuss the term connectivity of the Cayley picture fuzzy *** connectivity and edge connectivity of the Cayley picture fuzzy graphs are also *** also investigate the linkage between these ***,we provide the extensions of some characηteristics of both the PFGs and Cayley fuzzy graphs in the setting of Cayley picture fuzzy ***,we provide the model of interconnected networks based on the Cayley picture fuzzy graphs.

关键词： Cayley picture fuzzy graphs strong CPFGs connected CPFGs cut sets of CPFGs

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巴基斯坦立方星ICUBE-Q任务综述

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中国航天 2024年第7期 45-56页

作者：吴树范 Qamarul Islam 曾小勤 m.Rizwan mughal 慕忠成 khurram Khurshid 上海交通大学航空航天学院巴基斯坦空间技术研究所

作为“嫦娥”六号任务搭载的国际载荷之一,巴基斯坦ICUBE-Q立方星于2024年5月3日随“嫦娥”六号探测器发射升空。5月8日16时,ICUBE-Q在周期为12h的环月大椭圆轨道的远月点附近与“嫦娥”六号轨道器分离,随后成功拍摄第一幅影像。任务实... 详细信息

作为“嫦娥”六号任务搭载的国际载荷之一,巴基斯坦ICUBE-Q立方星于2024年5月3日随“嫦娥”六号探测器发射升空。5月8日16时,ICUBE-Q在周期为12h的环月大椭圆轨道的远月点附近与“嫦娥”六号轨道器分离,随后成功拍摄第一幅影像。任务实现“成功分离,获得遥测”的既定目标,取得圆满成功。重点从卫星总体方案、关键技术和解决途径、卫星总体研制情况、在轨运维情况及研制经验等多个方面对ICUBE-Q立方星进行介绍,为未来深空探月纳卫星任务积累技术基础。

关键词：立方星对月成像在轨智能处理地月测控

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ZnSe/ITO thin films:candidate for CdTe solar cell window layer

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Journal of Semiconductors 2017年第9期38卷 14-18页

作者： A.A.khurram m.Imran Nawazish A.khan m.Nasir mehmood Industrial Technology Development National Centre for PhysicsIslamabadPakistan materials Science Laboratory Department of PhysicsQuaid-i-Azam UniversityIslamabadPakistan Optics Lab PINSTECHNilorePakistan

The crystal structure, electrical and optical properties of ZnSe thin films deposited on an In203 ：Sn （ITO） substrate are evaluated for their suitability as the window layer of CdTe thin film solar cells. ZnSe thin films of 80, 90, and 100 nm thickness were deposited by a physical vapor deposition method on Indium tin oxide coated glass substrates. The lattice parameters are increased to 5.834 A when the film thickness was 100 rim, which is close to that of CdS. The crystallite size is decreased with the increase of film thickness. The optical transmission analysis shows that the energy gap for the sample with the highest thickness has also increased and is very close to 2.7 eV. The photo decay is also studied as a function of ZnSe film thickness.

关键词： ZnSe thin films ITO substrate XRD optical transmission photodecay

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Graphene nanoplatelets-reinforced magnesium metal matrix nanocomposites with superior mechanical and corrosion performance for biomedical applications

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Journal of magnesium and Alloys 2020年第1期8卷 269-290页

作者： khurram munir Cuie Wen Yuncang Li School of Engineering RMIT UniversityMelbourneVictoria 3001Australia

magnesium(mg)metal matrix composites(mmCs)reinforced with graphene nanoplatelets(GNPs)have been developed by powder metallurgy(Pm).GNPs with different concentrations(0.1,0.2,and 0.3 wt.%),layer thicknesses(5 nm and 9 nm),and particle sizes(15μm and 5μm)were dispersed into mg powder by high-energy ball-milling *** microstructure and mechanical properties of the fabricated composites were characterized using transmission electron microscopy(TEm),scanning electron microscopy(SEm),energy dispersive X-ray spectroscopy(EDX),X-ray diffraction(XRD),Raman spectroscopy(RS),and compression *** corrosion resistance was evaluated by electrochemical tests and hydrogen evolution *** cytotoxicity of mg-GNPs composites was assessed using osteoblast-like SaOS2 *** results indicate that GNPs are excellent candidates as reinforcements in mg matrices for the manufacture of biodegradable mg-based composite *** addition improved the mechanical properties of mg via synergetic strengthening ***,retaining the structural integrity of GNPs during processing improved the ductility,compressive strength,and corrosion resistance of the mg-GNP *** assessments did not reveal any significant toxicity with the addition of GNPs to mg *** study demonstrates that mg-xGNPs with xmay constitute novel biodegradable implant materials for load-bearing applications.

关键词： In vitro cytotoxicity Biocorrosion magnesium-graphene composite mechanical properties Strengthening mechanisms

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Assessment of seismic hazard of roller compacted concrete dam site in Gilgit-Baltistan of northern Pakistan

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Earthquake Engineering and Engineering Vibration 2021年第3期20卷 621-630页

作者： Shahzada khurram Perveiz Khalid Jahanzeb Qureshi Zia Ud Din Institute of Geology University of the PunjabLahore 54590Pakistan Department of Space Science University of the PunjabLahore 54590Pakistan

The proposed site of the Diamer Bhasha Dam in northern Pakistan is situated in an active tectonic zone with intensive seismicity,which makes it necessary for seismic hazard analysis(SHA).Deterministic and probabilistic approaches have been used for SHA of the dam *** main mantle Thrust(mmT),main Karakaram Thrust(mKT),Raikot-Sassi Fault(RKSF)and Kohistan Fault(KF)have been considered as major seismic sources,all of which can create maximum ground shaking with maximum potential earthquake(mPE).Deterministically estimated mPE for magnitudes of 7.8,7.7,7.6,and 7.1 can be produced from mmT,mKT,RKSF and KF,*** corresponding peak ground accelerations(PGA)of 0.07,0.11,0.13 and 0.05 g can also be generated from these earthquakes,*** deterministic analysis predicts a so-called floating earthquake as a mPE of magnitude=7.1 as close as 10 km away from the *** corresponding PGA was computed as 0.38 g for a maximum design earthquake at the project ***,the probabilistic analysis revealed that the PGA with 50%probability of exceedance in 100 years is 0.18 ***,this PGA value related to the operational basis earthquake(OBE)is suggested for the design of this project with shear wave velocity(V_(s30))equal to 760 m/s under dense soil and soft rock conditions.

关键词： seismic hazard analysis peak ground acceleration Gilgat-Biltastan Diamer Bhasha Dam

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Evaluating the potential of surface-modified silica nanoparticles using internal olefin sulfonate for enhanced oil recovery

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Petroleum Science 2020年第3期17卷 722-733页

作者： Afaque Ahmed Ismail mohd Saaid Abdelazim Abbas Ahmed Rashidah m.Pilus mirza khurram Baig Petroleum Engineering Department Universiti Teknologi PETRONASSeri IskandarMalaysia Center of Research in Enhanced Oil Recovery Universiti Teknologi PETRONASSeri IskandarMalaysia Department of Physics University of OkaraOkaraPunjabPakistan

Recently,nanoparticles have proven to enhance oil recovery on the core-flood scale in challenging high-pressure high-temperature *** generally appear to improve oil production through wettability alteration and reduction in interfacial tension between oil and water ***,they are environmentally friendly and cost-effective enhanced oil recovery *** the rheological properties of nanoparticles is critical for field *** instability of nanoparticle dispersion due to aggregation is considered as an unfavorable phenomenon in nanofluid flooding while conducting an EOR *** this study,wettability behavior and rheological properties of surface-treated silica nanoparticles using internal olefins sulfonates(IOS20–24 and IOS19–23),anionic surfactants were *** modification effect on the stability of the colloidal solution in porous media and oil recovery was *** rheology of pure and surfacetreated silica nanoparticles was investigated using a HPHT *** and particle size distributions of pure and coated silica nanoparticles were studied using a field emission scanning electron microscope.A series of core-flood runs was conducted to evaluate the oil recovery *** coated silica nanoparticles were found to alter rheological properties and exhibited a shear-thinning behavior as the stability of the coated silica nanoparticles could be improved *** low shear rates,the viscosity slightly increases,and the opposite happens at higher shear ***,the surfacemodified silica nanoparticles were found to alter the wettability of the aqueous phase into strongly water-wet by changing the contact angle from 80°to 3°measured against glass slides representing sandstone ***–water IFT results showed that the surface treatment by surfactant lowered the oil–water IFT by 30%.Also,the viscosity of brine increased from 0.001 to 0.008 Pa s by introducing SiO2 nano

关键词： Silica nanoparticles Anionic surfactant Rheological properties of nano fluids Wettability alteration Enhanced oil recovery

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