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Advanced Fiber Materials 2021年第4期3卷 251-264页

作者： Jing Yin adnan ahmed Lan Xu Engineering Laboratory for Modern Silk College of Textile and EngineeringSoochow University199 Ren-ai RoadSuzhou 215123China

For obtaining high-throughput production of nanofibers,the preparation mechanism of a self-made spherical section free surface electrospinning(SSFSE)using solution reservoirs with different depths was *** effects of the solution res-ervoir depth on the SSFSE process as well as the quality and yield of polyacrylonitrile(PAN)nanofibers were investigated experimentally using high-speed camera,precise electronic balance and scanning electron ***,the results were analyzed theoretically by response surface methodology(RSM)and numerical *** values predicted by the established RSM model and the electric field results obtained by Maxwell 3D were all consistent with the experimental data,which showed that the different depths of the solution reservoir had little effect on the quality of PAN nanofibers,but had great effects on the yields of *** PAN nanofibers prepared have the best quality and the highest yields when the maximum depth of the solution reservoir was 4.29 mm.

关键词： Free surface electrospinning Nanofibers High-throughput production Response surface methodology Electric field simulation

Batch Preparation and Characterization of Electrospun Porous Polylactic Acid‑Based Nanofiber Membranes for Antibacterial Wound Dressing

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Advanced Fiber Materials 2022年第4期4卷 832-844页

作者： Jing Yin Lan Xu adnan ahmed National Engineering Laboratory for Modern Silk College of Textile and Clothing EngineeringSoochow UniversitySuzhouChina

A good wound dressing needs to promote wound healing and tissue repair when the skin is *** this study,a self-made spherical section free surface electrospinning device was used to produce large quantities of electrospun porous polylactic acid(PLA)/chitosan(CS)/aloin nanofiber membranes(NFMs)for antibacterial wound *** porous structures of PLAbased nanofibers were controlled by adjusting the weight ratios of mixed solvent and *** results showed that highquality porous PLA/CS/aloin(PCA)NFMs were obtained when the weight ratios of chloroform/N,N-dimethylformamide and PLA:CS were 90/10 and 7:1,*** porous PCA NFMs exhibited high porosity,acceptable mechanical properties,moderate hydrophobicity,good swelling property,and high water vapor transmission ***,they also showed excellent blood coagulative,antibacterial,biocompatible properties,which had the potential to be used in the application of antibacterial wound dressings.

关键词： Batch preparation Polylactic acid/chitosan/aloin Nanofiber membranes Spherical section free surface electrospinning Antibacterial wound dressings

A survey on trust based detection and isolation of malicious nodes in ad-hoc and sensor networks

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Frontiers of Computer Science 2015年第2期9卷 280-296页

作者： adnan ahmed Kamalrulnizam ABU BAKAR Muhammad Ibrahim CHANNA Khalid HASEEB Abdul Waheed KHAN Faculty of Computing Universiti Teknologi Malaysia Johor Bahru 81310 Malaysia Department of Information Technology Quaid-e-Awam University of Engineering Science and Technology Nawabshah 67450 Pakistan

Mobile ad-hoc networks （MANETs） and wireless sensor networks （WSNs） have gained remarkable apprecia- tion and technological development over the last few years. Despite ease of deployment, tremendous applications and significant advantages, security has always been a challeng- ing issue due to the nature of environments in which nodes operate. Nodes＇ physical capture, malicious or selfish behav- ior cannot be detected by traditional security schemes. Trust and reputation based approaches have gained global recog- nition in providing additional means of security for decision making in sensor and ad-hoc networks. This paper provides an extensive literature review of trust and reputation based models both in sensor and ad-hoc networks. Based on the mechanism of trust establishment, we categorize the state- of-the-art into two groups namely node-centric trust mod- els and system-centric trust models. Based on trust evidence, initialization, computation, propagation and weight assign- ments, we evaluate the efficacy of the existing schemes. Fi- nally, we conclude our discussion with identification of some unresolved issues in pursuit of trust and reputation manage- ment.

关键词： trust reputation wireless sensor network mo-bile ad-hoc networks routing node misbehavior

A Novel Technique for Early Detection of COVID-19

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Computers, Materials & Continua 2021年第8期68卷 2283-2298页

作者： Mohammad Yamin adnan ahmed Abi Sen Zenah Mahmoud AlKubaisy Rahaf Almarzouki Department of Management Information Systems Faculty of Economics and AdministrationKing Abdulaziz UniversityJeddah21589Saudi Arabia Faculty of Computer and Information Systems Islamic University of MadinahAl MedinaSaudi Arabia

COVID-19 is a global pandemic disease,which results from a dangerous coronavirus attack,and spreads aggressively through close contacts with infected people and *** far,there is not any prescribed line of treatment for COVID-19 *** to control the disease are very limited,partly due to the lack of knowledge about technologies which could be effectively used for early detection and control the *** detection of positive cases is critical in preventing further spread,achieving the herd immunity,and saving ***,so far we do not have effective toolkits to diagnose very early detection of the *** research findings have suggested that radiology images,such as X-rays,contain significant information to detect the presence of COVID-19 virus in early ***,to detect the presence of the disease in in very early stages from the X-ray images by the naked eye is not *** Intelligence(AI)techniques,machine learning in particular,are known to be very helpful in accurately diagnosing many diseases from radiology *** paper proposes an automatic technique to classify COVID-19 patients from their computerized tomography(CT)scan *** technique is known as Advanced Inception based Recurrent Residual Convolution Neural Network(AIRRCNN),which uses machine learning techniques for classifying *** focus on the Advanced Inception based Recurrent Residual Convolution Neural Network,because we do not find it being used in the ***,we conduct principal component analysis,which is used for dimensional *** results of our method have demonstrated an accuracy of about 99%,which is regarded to be very efficient.

关键词： COVID-19 classification feature selection dimensionality reduction chest CT deep learning deep convolutional neural network AIRRCNN

Measuring Entrepreneurial Characteristics among Graduates Students in Business Administration and Their Effect on Entrepreneurship （A Comparative Study）

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Measuring Entrepreneurial Characteristics among Graduates St...

作者： ESHAQ MOHAMMED adnan ahmed 湖南大学

学位级别：硕士

本文通过对安曼阿拉伯大学与湖南大学的比较性分析研究,旨在衡量工商管理研究生的创业特征及其对创业能力的影响。我们设计并分发了一份调查问卷,对（115）名男女学生进行分层抽样,其调查对象为该学年（2018-2019）的硕士和博士学位课... 详细信息

本文通过对安曼阿拉伯大学与湖南大学的比较性分析研究,旨在衡量工商管理研究生的创业特征及其对创业能力的影响。我们设计并分发了一份调查问卷,对（115）名男女学生进行分层抽样,其调查对象为该学年（2018-2019）的硕士和博士学位课程。问卷中使用了很多分析、描述和推理方法。此项研究的主要结论如下:安曼阿拉伯大学和湖南大学工商管理研究生的创业特征与创业能力之间存在正相关关系,皮尔逊相关系数为（.460）。这一趋势的力度表明,创业特征每增加一个单位,将导致创业能力增加33%。安曼阿拉伯大学和湖南大学工商管理研究生创业特征在显著性水平（0.05）上对创业能力有统计意义上的影响,为22.1%,对创业行为的影响占21.9%,对创业意愿的影响占8.7%。安曼阿拉伯大学和湖南大学工商管理研究生的创业能力和创业行为存在统计学意义上的显著差异,但其创业意愿无显著差异这项研究的主要建议如下:建议工商管理研究生课程和工商经济学院的教师将重点放在创业相关的学术课程,并在提供企业孵化器和适当的教学方法上,运用模拟实战的方法和手段,发现学生的创业特征,为创业做好准备

关键词：工商管理专业研究生创业特征学术课程

CNN Based Multi-Object Segmentation and Feature Fusion for Scene Recognition

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Computers, Materials & Continua 2022年第12期73卷 4657-4675页

作者： adnan ahmed Rafique Yazeed Yasin Ghadi Suliman AAlsuhibany Samia Allaoua Chelloug Ahmad Jalal Jeongmin Park Department of Computer Science Air UniversityIslamabad44000Pakistan Department of Computer Science and Software Engineering Al Ain UniversityAl Ain15551UAE Department of Computer Science College of ComputerQassim UniversityBuraydah51452Saudi Arabia Department of Information Technology College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Department of Computer Engineering Korea Polytechnic UniversitySiheung-siGyeonggi-do237Korea

Latest advancements in vision technology offer an evident impact on multi-object recognition and scene *** sceneunderstanding task is a demanding part of several technologies,like augmented reality-based scene integration,robotic navigation,autonomous driving,and tourist *** visual information in contextually unified segments,convolution neural networks-based approaches will significantly mitigate the clutter,which is usual in classical frameworks during scene *** this paper,we propose a convolutional neural network(CNN)based segmentation method for the recognition of multiple objects in an ***,after acquisition and preprocessing,the image is segmented by using ***,CNN features are extracted from these segmented objects,and discrete cosine transform(DCT)and discrete wavelet transform(DWT)features are *** the extraction of CNN features and computation of classical machine learning features,fusion is performed using a fusion ***,to select theminimal set of features,genetic algorithm-based feature selection is *** order to recognize and understand the multi-objects in the scene,a neuro-fuzzy approach is *** objects in the scene are recognized,the relationship between these objects is examined by employing the object-to-object relation ***,a decision tree is incorporated to assign the relevant labels to the scenes based on recognized objects in the *** experimental results over complex scene datasets including SUN Red Green Blue-Depth(RGB-D)and Cityscapes’demonstrated a remarkable performance.

关键词： Convolutional neural network decision tree feature fusion neurofuzzy system

基于DWT的鲁棒与半脆弱图像数字水印算法研究

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基于DWT的鲁棒与半脆弱图像数字水印算法研究

作者： Al-Barahany adnan ahmed Ali（阿德兰）武汉理工大学

学位级别：硕士

随着数字产品和国际互联网的迅猛发展,数字产品在版权保护和内容真实性认证方面正面临着越来越严峻的挑战。近年来,日渐成熟的鲁棒的和半脆弱的数字水印以及小波变换等技术,正逐步成为解决版权保护问题的重要手段之一。在对已有的水印... 详细信息

随着数字产品和国际互联网的迅猛发展,数字产品在版权保护和内容真实性认证方面正面临着越来越严峻的挑战。近年来,日渐成熟的鲁棒的和半脆弱的数字水印以及小波变换等技术,正逐步成为解决版权保护问题的重要手段之一。在对已有的水印算法进行分析的基础上,本文重点研究小波域的鲁棒的和半脆弱的数字水印系统,并围绕鲁棒水印系统中的人类的视觉模型,水印检测和抗攻击性能以及半脆弱水印系统中的内容认证等方面进行了深入的研究。对于鲁棒性数字水印技术,重点细致研究和分析了水印的嵌入和提取算法。本文对于鲁棒的水印技术所采用的是首先使用Zigzag变换将水印信息进行置乱处理,再结合扩频技术对置乱后的水印信息进行预处理,以增加水印的安全性和鲁棒性。结合人类视觉特点,将水印信息嵌入到2级小波变换的LL2分量中,能获得很好的鲁棒性。运用常见的加噪,中值量化和几何攻击等图像处理操作对嵌入水印后的图像进行攻击,结果显示该算法对加噪,中值量化和几何攻击也具有很强的鲁棒性。对于半脆弱数字水印技术,重点从嵌入算法和认证算法两方面进行了研究和分析。本文提出了基于小波域的半脆弱水印算法,它充分利用了小波变换的特点以及人眼的视觉特性,将水印信息嵌入到图像3级DWT的第二层的HL2,LH2, HH2中,这样既不影响原始图像视觉效果,也能很好的对图像内容及完整性进行验证。从含水印图像的不可见性,抵抗噪声、压缩等攻击的鲁棒性以及判断是否发生篡改,并定位出篡改区域等几个方面来对算法进行评估,结果表明该算法也具有较强的鲁棒性。其中对篡改的判断是通过篡改评估函数以及篡改定位图来判别的。在没有受到攻击时,篡改评估函数的值趋于零,而一旦篡改函数的值逐渐增大时,则篡改的程度也随之增大。最后,本文从对篡改的可检测性、算法安全性、可靠性、水印不可感知性等多个角度出发,对本算法与半脆弱性的典型算法进行了比较研究。理论分析和实验结果均表明该算法既能抵抗伪认证攻击,又保持了很好的局部篡改检测功能,是一种安全、有效、可靠的半脆弱数字水印算法。

关键词：鲁棒数字水印半脆弱数字水印 zigzag变换 DWT 扩频技术

Application of Heuristic (1-Opt local Search) and Metaheuristic (Ant Colony Optimization) Algorithms for Symbol Detection in MIMO Systems

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Communications and Network 2011年第4期3卷 200-209页

作者： Kiran Khurshid Safwat Irteza adnan ahmed Khan S. I. Shah 不详

Heuristic and metaheuristic techniques are used for solving computationally hard optimization problems. Local search is a heuristic technique while Ant colony optimization (ACO), inspired by the ants' foraging behavior, is one of the most recent metaheuristic technique. These techniques are used for solving optimization problems. Multiple-Input Multiple-Output (MIMO) detection problem is an NP-hard combinatorial optimization problem. We present heuristic and metaheuristic approaches for symbol detection in multi-input multi-output (MIMO) system. Since symbol detection is an NP-hard problem so ACO is particularly attractive as ACO algorithms are one of the most successful strands of swarm intelligence and are suitable for applications where low complexity and fast convergence is of absolute importance. Maximum Likelihood (ML) detector gives optimal results but it uses exhaustive search technique. We show that 1-Opt and ACO based detector can give near-optimal bit error rate (BER) at much lower complexity levels. Comparison of ACO with another nature inspired technique, Particle Swarm Optimization (PSO) is also discussed. The simulation results suggest that the proposed detectors give an acceptable performance complexity trade-off in comparison with ML and VBLAST detectors.

关键词： Spatial Multiplexing System 1-Opt ACO Multi-Input Multi-Output Systems Symbol Detection

Consecutive narrow and broad quasi-periodic fast-propagating wave trains associated with a flare

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Science China(Physics,Mechanics & Astronomy) 2024年第5期67卷 200-211页

作者： Xinping Zhou Yuandeng Shen Chengrui Zhou Zehao Tang ahmed ahmed Ibrahim College of Physics and Electronic Engineering Sichuan Normal UniversityChengdu 610068China State Key Laboratory of Space Weather Chinese Academy of SciencesBeijing 100190China Yunnan Observatories Chinese Academy of SciencesKunming 650216China Department of Physics and Astronomy College of ScienceKing Saud UniversityP.O.Box 2455Riyadh 11451Saudi Arabia

The excitation mechanism of coronal quasi-period fast-propagating(QFP)wave trains remains *** Atmospheric Imaging Assembly onboard the Solar Dynamics Observatory observations,we study a narrow and a broad QFP wave trains excited one after another during the successive eruptions of filaments hosted within a fan-spine magnetic system on October 20,*** consecutive occurrence of these two types of QFP wave trains in the same event provides an excellent opportunity to explore their excitation mechanisms and compare their physical *** observational results reveal that narrow and broad QFP wave trains exhibit distinct speeds,periods,energy fluxes,and relative intensity amplitudes,although originating from the same active region and being associated with the same GOES C2.9 *** wavelet analysis,we find that the narrow QFP wave train shares a similar period with the flare itself,suggesting its possible excitation through the pulsed energy release in the magnetic reconnection process that generated the accompanying *** the other hand,the broad QFP wave train appears to be associated with the energy pulses released by the successive expansion and unwinding of filament ***,it is plausible that the broad QFP wave train was also excited by the sequential stretching of closed magnetic field lines driven by the erupting *** findings shed light on the different excitation mechanisms and origins of the QFP wave trains.

关键词： narrow wave excitation

Study of scalar particles through the Klein–Gordon equation under rainbow gravity effects in Bonnor–Melvin-Lambda space-time

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Communications in Theoretical Physics 2024年第4期76卷 113-125页

作者： Faizuddin ahmed Abdelmalek Bouzenada Department of Physics University of Science&Technology MeghalayaRi-Bhoi793101India Laboratory of theoretical and applied Physics Echahid Cheikh Larbi Tebessi UniversityAlgeria

In our investigation,we explore the quantum dynamics of charge-free scalar particles through the Klein–Gordon equation within the framework of rainbow gravity,considering the Bonnor–Melvin-Lambda(BML)space-time *** BML solution is characterized by the magnetic field strength along the axis of the symmetry direction which is related to the cosmological constantΛand the topological parameterαof the *** behavior of charge-free scalar particles described by the Klein–Gordon equation is investigated,utilizing two sets of rainbow functions:(i)f(χ)=■,h(χ)=1 and(ii)f(χ)=1,h(χ)=1+βХ/*** 0<(Х=■)≤1 with E representing the particle's energy,Ep is the Planck's energy,andβis the rainbow *** obtain the approximate analytical solutions for the scalar particles and conduct a thorough analysis of the obtained ***,we study the quantum dynamics of quantum oscillator fields within this BML space-time,employing the Klein–Gordon *** also,we choose the same sets of rainbow functions and obtain the approximate eigenvalue solution for the oscillator ***,we demonstrate that the relativistic approximate energy profiles of charge-free scalar particles and oscillator fields get influenced by the topology of the geometry and the cosmological ***,we show that the energy profiles of scalar particles receive modifications from the rainbow parameter and the quantum oscillator fields by both the rainbow parameter and the frequency of oscillation.

关键词： quantum fields in curved space-time relativistic wave equations solutions of wave equations bound-state special functions