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Triple Key Security Algorithm Against Single Key Attack on Multiple Rounds

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Computers, Materials & Continua 2022年第9期72卷 6061-6077页

作者： Muhammad Akram Muhammad Waseem iqbal Syed Ashraf Ali Muhammad Usman Ashraf Khalid Alsubhi Hani Moaiteq Aljahdali Department of Computer Science Superior University Lahore54000Pakistan Department of Software Engineering Superior University Lahore54000Pakistan Department of Computer Science The Institute of Management Sciences(PAK-AIMS)Lahore54000Pakistan Department of Computer Science GC Women University SialkotPakistan Department of Computer Science King Abdulaziz UniversityJeddahSaudi Arabia Faculty of Computing and Information Technology King Abdulaziz UniversityJeddahSaudi Arabia

In cipher algorithms,the encryption and decryption are based on the same *** are some limitations in cipher algorithms,for example in polyalphabetic substitution cipher the key size must be equal to plaintext otherwise it will be repeated and if the key is known then encryption becomes *** paper aims to improve the said limitations by designing of Triple key security algorithm(TKS)in which the key is modified on polyalphabetic substitution cipher to maintain the size of the key and *** plaintext character is substituted by an alternative *** mode of substitution is transformed cyclically which depends on the current position of the modified *** keys are used in the encryption and decryption process on 8 or 16 rounds with the Exclusively-OR(XOR)of the 1st *** study also identifies a single-key attack on multiple rounds block cipher in mobile communications and applied the proposed technique to prevent the *** utilization of the TKS algorithm,the decryption is illustrated,and security is analyzed in detail with mathematical examples.

关键词： Encryption decryption cipher symmetric key cryptography single key attack

Dimeric quinacridone cyclophanes: Synthesis,structures,and photophysical properties

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Science China Chemistry 2011年第2期54卷 314-319页

作者： JAVAD iqbal State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University

Two novel quinacridone (QA) cyclophanes with intrinsic intramolecular dye-dye interactions have been designed and synthesized.X-ray crystal structures as well as detailed photophysical properties have been well *** two dyes have a major advantage that efficient fluorescence quenching can be observed even in their dilute solutions.A comparison of photophysical properties between the dimeric QA cyclophane and its reference monomeric counterpart indicates that the dimerization is predominant for the fluorescence quenching of QA dyes in *** study provided some model QA derivatives with dimeric structures for understanding the fluorescence quenching of QA dyes in solutions.

关键词：光物理性质喹吖啶酮晶体结构二聚体合成荧光猝灭质量保证稀释溶液

Device Discovery in D2D Communication: Scenarios and Challenges

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Computers, Materials & Continua 2023年第4期75卷 1735-1750页

作者： Adeel iqbal Ali Nauman Riaz Hussain Irfan Latif Khan Ali Khaqan Sana Shuja Sung Won Kim COMSATS University Islamabad45550Pakistan Yeungnam University Gyeongsan-si38541Korea

Device to Device (D2D) communication is expected to be anessential part of 5G cellular networks. D2D communication enables closeproximitydevices to establish a direct communication session. D2D communicationoffers many advantages, such as reduced latency, high data rates,range extension, and cellular offloading. The first step to establishing a D2Dsession is device discovery;an efficient device discovery will lead to efficientD2D communication. D2D device further needs to manage its mode of communication,perform resource allocation, manage its interference and mostimportantly control its power to improve the battery life of the device. Thiswork has developed six distinct scenarios in which D2D communication canbe initiated, considering their merits, demerits, limitations, and optimizationparameters. D2D communication procedures for the considered scenarioshave been formulated, based upon the signal flow, containing device discovery,resource allocation, and session teardown. Finally, latency for each scenariohas been evaluated, based on propagation and processing delays.

关键词： D2Dcommunication device discovery latency resource allocation

Detecting faulty sensors in an array using symmetrical structure and cultural algorithm hybridized with differential evolution

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Frontiers of Information Technology & Electronic Engineering 2017年第2期18卷 235-245页

作者： Shafqat Ullah KHAN Ijaz Mansoor QURESHI Fawad ZAMAN wasim KHAN School of Engineering & Applied Sciences ISRA University Islamabad 44000 Pakistan Electrical Department Air University Islamabad 44000 Pakistan Electrical Department COMSAT Instimte of lnformation Technology Attock 44000 Pakistan Electronic Engineering Department International Islamic University H-10 lslamabad 44000 Pakistan

本文解决了从N个传感器组成的线性阵列中检测完全或部分缺陷传感器的问题。本文首先提出了一种线性阵列的对称结构,其次,基于结合差分进化的文化算法,建立了一种混合技术。对称结构具有两个优点:(1)不需要找到所有损坏的模式,仅需找到(N... 详细信息

本文解决了从N个传感器组成的线性阵列中检测完全或部分缺陷传感器的问题。本文首先提出了一种线性阵列的对称结构,其次,基于结合差分进化的文化算法,建立了一种混合技术。对称结构具有两个优点:(1)不需要找到所有损坏的模式,仅需找到(N–1)/2个必需模式;(2)不需要扫描0°到180°区域,仅需扫描0°到90°区域。显然,这样可以减少计算的复杂度。通过Monte Carlo模拟对该方案性能进行了验证,并在计算时间和均方误差方面与现有方法进行了比较。

关键词：文化算法差分进化线性对称传感器阵列

Structure Preserving Algorithm for Fractional Order Mathematical Model of COVID-19

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Computers, Materials & Continua 2022年第5期71卷 2141-2157页

作者： Zafar iqbal Muhammad Aziz-ur Rehman Nauman Ahmed Ali Raza Muhammad Rafiq Ilyas Khan Kottakkaran Sooppy Nisar Department of Mathematics University of Management and TechnologyLahorePakistan Department of Mathematics and Statistics The University of LahoreLahorePakistan Stochastic Analysis&Optimization Research Group Department of MathematicsAir UniversityIslamabad44000Pakistan Department of Mathematics National College of Business Administration and EconomicsLahorePakistan Department of Mathematics Faculty of SciencesUniversity of Central PunjabLahore54500Pakistan Faculty of Mathematics and Statistics Ton Duc Thang UniversityHo Chi Minh City72915Vietnam Department of Mathematics College of Arts and Science at Wadi AldawaserPrince Sattam Bin Abdulaziz UniversityAlkharj11991Kingdom of Saudi Arabia

In this article,a brief biological structure and some basic properties of COVID-19 are described.A classical integer order model is modified and converted into a fractional order model withξas order of the fractional ***,a valued structure preserving the numerical design,coined as Grunwald–Letnikov non-standard finite difference scheme,is developed for the fractional COVID-19 *** into account the importance of the positivity and boundedness of the state variables,some productive results have been proved to ensure these essential *** of the model at a corona free and a corona existing equilibrium points is investigated on the basis of Eigen *** Routh–Hurwitz criterion is applied for the local stability *** appropriate example with fitted and estimated set of parametric values is presented for the *** solutions are displayed for the chosen values ofξ(fractional order of the derivatives).The role of quarantined policy is also determined gradually to highlight its significance and relevancy in controlling infectious *** the end,outcomes of the study are presented.

关键词： Coronavirus pandemic model deterministic ordinary differential equations numerical methods convergence analysis

Experimental Study on Transverse Bending Performance of Steel-UHPC Composite Deck

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Experimental Study on Transverse Bending Performance of Stee...

作者： Abdul wasim Hakimi 湖南大学

学位级别：硕士

正交异性钢桥面具有强度高、自重轻、适用性强等特点,广泛应用于大跨度桥梁的桥面体系。然而,长期的工程实践表明,传统的正交异性钢桥面存在结构复杂、焊缝多、沥青混凝土桥面铺装刚度不足等问题,在往复车轮荷载作用下容易出现疲劳开裂... 详细信息

正交异性钢桥面具有强度高、自重轻、适用性强等特点,广泛应用于大跨度桥梁的桥面体系。然而,长期的工程实践表明,传统的正交异性钢桥面存在结构复杂、焊缝多、沥青混凝土桥面铺装刚度不足等问题,在往复车轮荷载作用下容易出现疲劳开裂和路面损伤。针对这些问题,人们提出了一系列可行的解决方法,包括但不限于增加钢板厚度、采用水泥基铺装层代替沥青铺装层、提高焊接质量等。近年来,针对上述问题,湖南大学邵旭东教授团队将UHPC这一高性能材料的优势引入到桥面板结构,提出了一种新型钢-UHPC轻型桥面结构体系(LWCD),该体系由一层35-60mm的UHPC覆盖在传统桥面,通过剪力钉与桥面连接。但这种结构仍然依托于正交异性钢桥面,其结构复杂、焊缝多等问题仍无法得到根本解决。本文研究了一种新型的钢板-UHPC轻型组合桥面板结构的横向受弯性能,该结构采用开孔钢板(PBL)作为UHPC和钢板之间的连接件(PBL剪力连接键),相比于钢-UHPC轻型桥面板(LWCD),该类型结构取消了正交异性桥面板的纵向肋,大大减少了焊缝作业,简化了施工程序,且相比LWCD结构主要依托正交异性桥面来提供刚度,该类型桥面板在一定情况下可以单独作为独立受力结构。作为一种新的结构体系,关于该结构的研究和应用,目前尚处于起步阶段,为探明该类型桥面板的横向受弯性能,作者基于在建的实际桥梁工程制作了4片全尺寸试件,对组合桥面板的抗弯性能进行了试验研究,得到了荷载-挠度曲线、应变分布、结构刚度和承载力、开裂荷载、裂缝宽度、裂缝发展模式、破坏模式、滑移行为等规律,此外,利用数字图像识别观测系统(DIC)对其中两个试件进行应变分布分析。随后,利用Abaqus CAE软件建立了组合板的有限元模型,利用非线性分析,对组合板的受力状况进行了模拟,通过与试验测试结果比较,验证了有限元分析的正确性,在此基础上展开参数研究。根据试验结果,作者还建立了考虑UHPC抗拉贡献的组合板抗弯承载力的理论计算公式,计算结果表明,所提出来的公式与试验结果吻合良好。本文从背景工程出发,进行了上述研究分析,研究方法与所得结论可为类似结构的研究发展贡献力量。

关键词：钢板-UHPC组合桥面板 PBL剪力连接键试验研究受弯性能有限元分析

Sustainable food industrial waste management through single cell protein production and characterization of protein enriched bread

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Food Bioscience 2022年第2期46卷 639-646页

作者： Muhammad Kashif iqbal Khan Muhammad Asif Zafar Ullah Razzaq Akmal Nazir Abid Aslam Maan Department of Food Engineering University of AgricultureFaisalabadPakistan National Institute of Food Science and Technology University of AgricultureFaisalabadPakistan Department of Food Science College of Agriculture and Veterinary MedicineUnited Arab Emirates UniversityAl AinUnited Arab Emirates

Production of single cell protein(SCP)from food waste is one of the promising approaches for excellent waste *** the present study,SCP was produced through submerged fermentation using selected food wastes(banana peel,citrus peel,carrot pomace and potato peel).During process optimization,combinations of various temperature and nitrogen sources were studied for optimum SCP yield(g/100g).The results indicated that maximum SCP yield was obtained at 30℃ for 7 days on potato peels,whereas citrus and banana peels exhibited the lowest SCP yield at the same process *** SCP compositional analysis indicated that the amount of non-essential amino acids was significantly higher than wheat ***,SCP enriched bread was prepared by adding SCP at different concentrations(0,4,8,and 12%).The organoleptic properties indicated that SCP addition up to 4%was acceptable to prepare protein enriched ***,SCP may be effectively used for food waste management and food security.

关键词： Fruit waste Food security Single cell protein Bread Protein deficiency Malnourishment

Optimized Evaluation of Mobile Base Station by Modern Topological Invariants

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Computers, Materials & Continua 2023年第1期74卷 363-378页

作者： Khalid Hamid Muhammad Waseem iqbal Muhammad Usman Ashraf Ahmed Mohammed Alghamdi Adel A.Bahaddad Khalid Ali Almarhabi Department of Computer Science Superior UniversityLahore54000Pakistan Department of Software Engineering Superior UniversityLahore54000Pakistan Department of Computer Science GC Women UniversitySialkot53310Pakistan Department of Software Engineering College of Computer Science and EngineeringUniversity of Jeddah21493Saudi Arabia Department of Information System Faculty of Computing and Information TechnologyKing Abdulaziz UniversityJeddah21589Saudi Arabia Department of Computer Science College of Computing in Al-QunfudahUmm Al-Qura UniversityMakkah24381Saudi Arabia

Due to a tremendous increase in mobile traffic,mobile operators have started to restructure their networks to offload their *** directions will lead to fundamental changes in the design of future Fifthgeneration(5G)cellular *** the formal reason,the study solves the physical network of the mobile base station for the prediction of the best characteristics to develop an enhanced network with the help of graph *** number that can be uniquely calculated by a graph is known as a graph *** the last two decades,innumerable numerical graph invariants have been portrayed and used for correlation *** any case,no efficient assessment has been embraced to choose,how much these invariants are connected with a network *** paper will talk about two unique variations of the hexagonal graph with great capability of forecasting in the field of optimized mobile base station topology in setting with physical *** K-banhatti sombor invariants(KBSO)and Contrharmonic-quadratic invariants(CQIs)are newly introduced and have various expectation characteristics for various variations of hexagonal graphs or *** the hexagonal networks are used in mobile base stations in layered,forms called *** review settled the topology of a hexagon of two distinct sorts with two invariants KBSO and CQIs and their reduced *** deduced outcomes can be utilized for the modeling of mobile cellular networks,multiprocessors interconnections,microchips,chemical compound synthesis and memory interconnection *** results find sharp upper bounds and lower bounds of the honeycomb network to utilize the Mobile base station network(MBSN)for the high load of traffic and minimal traffic also.

关键词： Hexagonal networks k-banhatti sombor invariants maple network graph artificial intelligence contraharmonic-quadratic invariants honeycomb

Innovative hydrophobic/hydrophilic perfluoropolyether(PFPE)/polyvinylidene fluoride(PVDF)composite membrane for vacuum membrane distillation

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Chinese Journal of Chemical Engineering 2022年第5期35卷 248-257页

作者： Jun Pan Xianli Xu Zhaohui Wang Shi-Peng Sun Zhaoliang Cui Lassaad Gzara iqbal Ahmed Omar Bamaga Mohammed Albeirutty Enrico Drioli State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemistry and Chemical EngineeringNanjing Tech UniversityNanjing 210009China National Engineering Research Center for Special Separation Membrane Nanjing Tech UniversityNanjing 210009China Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM) Nanjing Tech UniversityNanjing 210009China Center of Excellence in Desalination Technology King Abdulaziz UniversityJeddah 21589Saudi Arabia Mechanical Engineering Department King Abdulaziz UniversityJeddah 21589Saudi Arabia Research Institute on Membrane Technology ITM-CNRVia Pietro Bucci 17/CRende 87036Italy

Though membrane distillation(MD)has gained more and more attention in the field of desalination,the wetting phenomenon was still a non-negligible *** this work,a method combined dip-coating and UV in situ polymerization for preparing hydrophobic/hydrophilic perfluoropolyether(PFPE)/polyvinylidene fluoride composite *** composite membrane consisted of a top thin hydrophobic coating layer and hydrophilic substrate *** terms of anti-wetting properties,contact angle and liquid entry pressure of all composite membranes(except for those based on 0.45μm)exceeded 160°and 0.3 MPa,*** particular,the desalination performance was tested in vacuum membrane distillation tests by feeding 3.5%(mass)saline solution(NaCl)at 60℃.The composite membranes with larger support pore size and lower PFPE content had higher membrane distillation *** for stability tests(testing the 0.22μm membrane coated by 5%(mass)PFPE),the highest MD flux29.08 kg·m^(-2)·h^(-1) and stable salt rejection(over 99.99%)during the *** that,the effects of coating material concentration and pore sizes of substrate membrane were also investigated for surface morphology and topography,porosity,mechanical strength and pore size *** work provided a simple and effective alternative to prepare excellent hydrophobic composite membranes for MD applications.

关键词： Desalination Membrane surface coating Composite membranes Anti-wetting Vacuum membrane distillation