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A new fractional order 6D chaotic model:Study of model dynamics,system structure graph,electronic circuit realization and fractional control

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Journal of Ocean Engineering and Science 2024年第2期9卷 112-125页

作者： M.Higazy Norah Almalki shabbir muhammad A.Al-Ghamdi Department of Mathematics and Statistics College of ScienceTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Department of Physics and Engineering Mathematics Faculty of Electronic EngineeringMenoufia UniversityMenouf 32952Egypt Research Center for Advanced Materials Science(RCAMS) King Khalid UniversityP.O.Box 9004Abha 61413Saudi Arabia Department of Chemistry College of ScienceKing Khalid UniversityP.O.Box 9004Abha 61413Saudi Arabia Department of Physics Faculty of ScienceKing Abdulaziz UniversityP.O.Box 80203Jeddah 21589Saudi Arabia

A new fractional 6D chaotic model is constructed in this *** new fractional 6D chaotic model has six positive parameters plus the fractional order with eight nonlinear *** complicated chaotic dy-namics of the new fractional 6D model is presented and *** basic properties of this model are studied and its chaotic attractors,dissipative feature,symmetry,equilibrium points,Lyapunov Exponents are *** new dynamics of the 6D fractional model is numerically simulated using Matlab *** addition,utilizing the graph theory tools certain structural characteristics are *** electrical circuit is built to implement the new 5.4 fractional order 6D ***,an active fractional order controller is proposed to control the new model at different fractional *** chaos of the new model is very useful and can be used to produce random keys for data encryption.

关键词： Chaotic systems Fractional calculus Lyapunov exponents Chaotic attractors Adjacency matrix Hermitian matrix Electronic circuit realization

Regioselective electrochemical radical cascade cyclization of internal alkynes to selenated and trifluoromethylated dihydropyran

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Science China Chemistry 2023年第11期66卷 3178-3185页

作者： Mingming Yu Tiantian Huang Lin Zhang muhammad shabbir Yuhan Gao Yi-Hung Chen Hong Yi Aiwen Lei The Institute for Advanced Studies(IAS) Wuhan UniversityWuhan 430072China National Research Center for Carbohydrate Synthesis Jiangxi Normal UniversityNanchang 330022China

Dihydropyran(DHP)compounds are not only found in natural products and bioactive molecules,but also serve as important precursors in organic ***,traditional methods for the construction of such compounds are usually limited to disubstituted *** address this synthetic challenge,reported here is an efficient electrochemical strategy toward the selenated and trifluoromethylated DHP *** reaction proceeded smoothly under mild electrolysis *** broad substrate scope(>50 examples)and scalable synthesis demonstrated the complexity-building potential of the *** mechanistic studies reveal that cyclization may involve a radical *** protocol may promote the further development of diversified synthesis of multi-substituted dihydropyran.

关键词： electrochemical organic synthesis dihydropyran cascade cyclization selenylation trifluoromethylation

Economic outlook of rice crops in Pakistan:a time series analysis (1970-2015)

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Financial Innovation 2017年第1期3卷 162-170页

作者： Abdul Rehman Luan Jingdong Abbas Ali Chandio muhammad shabbir Imran Hussain College of Economics and Management Anhui Agricultural UniversityHefeiAnhuiChina College of Economics and Management Sichuan Agricultural UniversitySichuanYaan ShiSichuan ShengChina University of Kotli Azad Jammu&Kashmir KotliPakistan Allama Iqbal Open University Islamabad 44000Pakistan

Background:The basic objective of this study was to examine the relationship between the rice output,its production area,water availability,and agricultural gross domestic product(GDP)of *** time series data for 1970–2015 were collected from the National Food Security and Research,Economic Survey of Pakistan,and Pakistan Bureau of Statistics(various publications).Methods:Rice crop data were analyzed using the ordinary least square method and the augmented Dickey–Fuller *** interpreted using the Johansen cointegration ***:Our study revealed the existence of a long-standing relationship between rice output,its production area,and water availability with the agricultural GDP of *** results indicate that rice output and cultivated area have a significant and positive relationship with agricultural GDP,while water availability has a negative ***:The study suggests that the government of Pakistan should design new policies and funding schemes for developing and improving water availability.

关键词： Rice output Water availability Agricultural GDP OLS methods Aromatic basmati Rice And irrigation system

Impact of Acute-angled Pull-in and Push-out Configurations in Halo Derivatives of Li@B10H14 Basket:a Quantum Chemical Approach to Achieve a Trade-off between Higher Stability and Large NLO Response

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Impact of Acute-angled Pull-in and Push-out Configurations i...

Non-noble metal single-atom catalyst of Co_(1)/MXene(Mo_(2)CS_(2))for CO oxidation

中国化学会第27届学术年会

作者： shabbir muhammad Institute of Functional Material Chemistry and Key Laboratory of Polyoxometalate Science of Ministry of Education and Faculty of Chemistry Northeast Normal University

A quantum chemical study has been performed on Li@B10H14 and its halo derivatives to get a tread off between higher stability and large nonlinear optical （NLO） response. We have designed the derivatives with simultaneous effects of acute-angled push-out and pull-in which have been separately reported in previous excess electron lithium complexes （Li et al. J. Am. Chem. Soc. 2005, 127, 10977-10981 and S. muhammad et al. J. Am. Chem. Soc. 2009, 131, 11833-11840）. Among our different derivatives 6,9-F2Li@B10H12 and 2,4,6,9F4Li@B10H10 have shown β0 values as large as 133199 au and 32313 au respectively. The compound 2,4,6,9-F4Li@B10H10 can be considered a practical model compound among others with highest calculated vertical ionization potential of 6.775 eV and enthalpy change of -240.21 Kcalmol-1 during the formation of 2,4,6,9-F4Li@B10H10 from Li@B10H14. The present study highlighted the different electro-optical and thermodynamical aspects, which might give useful guideline for the experimentalists to synthesize these excess electro lithium fluoro-boranes.

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Science China Materials 2021年第3期64卷 651-663页

作者： Shamraiz Hussain Talib Sambath Baskaran Xiaohu Yu Qi Yu Beenish Bashir shabbir muhammad Sajjad Hussain Xuenian Chen Jun Li Department of Chemistry and Key Laboratory of Organic Optoelectronics&Molecular Engineering of Ministry of Education Tsinghua UniversityBeijing100084China Department of Chemistry Southern University of Science and TechnologyShenzhen518055China Shaanxi Key Laboratory of Catalysis Shaanxi University of TechnologyHanzhong723000China Research Center for Advanced Materials Sciences(RCAMS) King Khalid UniversityAbha61413P.O.Box 9004Saudi Arabia School of Chemistry and Chemical Engineering Henan Key Laboratory of Boron Chemistry and Advanced Energy MaterialsHenan Normal UniversityXinxiang453007China

MXene is a variety of new two-dimensional(2D)materials with early transition metal carbides,nitrides,and *** chemical studies have been carried out on the geometries,electronic structures,stability and catalytic properties of a non-noble metal single-atom catalyst(SAC)with single Co atom anchored on MXene materials of Mo_(2)CS_(2).The Co adatom anchored on top of the Mo atom of this MXene is found to be rather stable,and this SAC is appropriate for CO *** charge transfers from the surface to the adsorbed CO and O2 play a significant role in the activation of these molecules on Co_(1)/Mo_(2)CS_(2).With this catalyst,the Eley-Rideal(ER),Langmuir-Hinshelwood(LH),and Termolecular Eley-Rideal(TER)mechanisms are explored for CO *** find that,while all the three mechanisms are feasible at low temperature,Co_(1)/Mo_(2)CS_(2) possesses higher catalytic activity for CO oxidation through the TER mechanism that features an intriguing OC(OO)CO intermediate(IM)adsorbed on Co single *** calculated activation energy barriers of the rate-limiting step are 0.67 eV(TER),0.78 eV(LH)and 0.88 eV(ER),*** present study illustrates that it is promising to develop and design low-cost,non-noble metal SACs using MXene types of 2D materials.

关键词： heterogeneous catalysis 2D MXene monolayer CO oxidation DFT calculations Co1/Mo2CS2 single-atom catalyst

Requirement Change Management in Global Software Environment Using Cloud Computing

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Journal of Software Engineering and Applications 2014年第8期7卷 694-699页

作者： Saiqa Bibi Yasir Hafeez muhammad shabbir Hassan Zartasha Gul Huma Pervez Irfan Ahmed Saira Mazhar PirMehar Ali Shah Arid Agriculture University Institute of Information Technology Rawalpindi Pakistan

The successful implementation of any software project depends upon the requirements. Change in requirements at any stage during the life cycle of software development is taken as a healthy process. However, making out this change in a co-located environment is somewhat easier than the distributed environment where stakeholders are scattered at more than one location. This raises many challenges?i.e.?coordination, communication & control, managing change effectively and efficiently and managing central repository. Thus, cloud computing can be applied to minimize these challenges among the stakeholders. We have used a case study to evaluate the framework using cloud computing.

关键词： Challenges of Requirement Change Management Role of Cloud Computing in GSD Benefits of Cloud Computing

Design and Synthesis of NiO@Co_(3)O_(4)@ZSM-5 Heterogeneous Multitask Hollow Structures for Tandem Catalysis

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Chemical Research in Chinese Universities 2024年第3期40卷 529-535页

作者： muhammad Waqas Interdisciplinary Research Center for Refining and Advanced Chemicals King Fahd University of Petroleum&MineralsDhahran 31261Saudi Arabia

Precipitation and impregnation procedures unevenly distribute metals on zeolite,limiting chemical transformation in Lewis-acid,Brönsted-acid and metal-catalyzed tandem ***,heterogeneous multitask transition metals oxides@zeolites are promising catalysts for sustainable processes;nevertheless,synthesis is fascinating and ***,the construction of purposely designed multitask materials segregated in selective shells reveals the remarkable spatial organization of metals-zeolite,resulting in them being suitable for a wide range of tandem *** synthesis of multi-site catalysts begins with a universal wet chemistry approach that yields nickel oxide(NiO)***,the NiO crystals are stabilized using cationic dodecyltrimethylammonium bromide,followed by achieving cross-linking carbon growth by emulsion polymerization of glucose in hydrothermal treatment to yield uniformed NiO@carbon spheres(NiO@CSs).Next,sequential adsorption of cobalt cations and colloidal ZSM-5(1%in H_(2)O,mass fraction),followed by calcination in air,yielded NiO@cobalt oxide@zeolite denoted as NiO@Co_(3)O_(4)@ZEO hollow *** hollowing mechanism and materials segregation within shells are revealed by scanning and transmission electron microscopy,thermogravimetric analysis,and X-ray *** finding advances the rational synthesis of heterogenous core-shell hollow structures for various gas phase catalytic tandem reactions to yield valuable chemicals.

关键词： Multifunctional Core-shell hollow spheres Gas-phase reaction Valuable chemical

An integrated land change modeler and distributed hydrological model approach for quantifying future urban runoff dynamics

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Science China Earth Sciences 2024年第10期67卷 3288-3301页

作者： Asad Hussain muhammad Waseem muhammad Ajmal muhammad Atiq Ur Rehman Tariq muhammad Jiaqing XIAO Tao YANG Pengfei SHI Institute for Disaster Risk Management School of Geographical ScienceNanjing University of Information Science and TechnologyNanjing 210044China The National Key Laboratory of Water Disaster Prevention Hohai UniversityNanjing 210098China Yangtze Institute for Conservation and Development Hohai UniversityNanjing 210098China College of Hydrology and Water Resources Hohai UniversityNanjing 210098China Centre of Excellence in Water Resources Engineering University of Engineering and TechnologyLahore 54890Pakistan Department of Agricultural Engineering Faculty of CivilAgricultural and Mining EngineeringUniversity of Engineering and TechnologyPeshawar 25120Pakistan

Climate and land use changes have a significant impact on the runoff generation process in urban environments, and these effects could get worse in the future. The combined contributions of these changes have increased the risk of ***, there is a need for integrated modeling to better understand the runoff variability, especially in small urban catchments. To quantify and separate the effects of land-use changes and climate change on the hydrological response of urban catchments with a distributed hydrological model(Storm Water Management Model, SWMM), this study introduces a new integrated approach based on the Machine Learning based land use change modeler and climate change scenarios under *** on supervised classification and land use change model analysis, accumulated impervious area increase from 22%(in2023) to 33%(in 2060) was observed in the study area. Furthermore, integrating this projected increase in imperviousness with future climate change into SWMM by considering three different scenarios i.e., S1(Climate Change), S2(Combined Land Use and Climate Change), and S3(Land use Change) resulted that climate change could cause an increase in runoff from 13.2% to18.3% in peak runoff and the contribution of land use could range from 9.1% to 18.6%. Similarly, in response to the coupled effects of climate and land-use change, the runoff would likely change from 24.53% to 39.66%. Conclusively, the study showed that despite climate change, intensive urban development by the substitution of impervious surfaces could also have a severe impact on the microclimate and hydrology of small catchments. Lastly, this study could provide a way forward for the future planning and management of water resources in small catchments which could be extended to larger catchments.

关键词： Climate change Land-use modeling Runoff simulation Percent Imperviousness TerrSet

Enhancing PDF Malware Detection through Logistic Model Trees

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Computers, Materials & Continua 2024年第3期78卷 3645-3663页

作者： muhammad Binsawad Department of Information Systems King Abdulaziz UniversityP.O.Box 80217Jeddah21589Saudi Arabia

Malware is an ever-present and dynamic threat to networks and computer systems in cybersecurity,and because of its complexity and evasiveness,it is challenging to identify using traditional signature-based detection *** study article discusses the growing danger to cybersecurity that malware hidden in PDF files poses,highlighting the shortcomings of conventional detection techniques and the difficulties presented by adversarial *** article presents a new method that improves PDF virus detection by using document analysis and a Logistic Model *** a dataset from the Canadian Institute for Cybersecurity,a comparative analysis is carried out with well-known machine learning models,such as Credal Decision Tree,Naïve Bayes,Average One Dependency Estimator,Locally Weighted Learning,and Stochastic Gradient *** traditional structural and JavaScript-centric PDF analysis,the research makes a substantial contribution to the area by boosting precision and resilience in malware *** use of Logistic Model Tree,a thorough feature selection approach,and increased focus on PDF file attributes all contribute to the efficiency of PDF virus *** paper emphasizes Logistic Model Tree’s critical role in tackling increasing cybersecurity threats and proposes a viable answer to practical issues in the *** results reveal that the Logistic Model Tree is superior,with improved accuracy of 97.46%when compared to benchmark models,demonstrating its usefulness in addressing the ever-changing threat landscape.

关键词： Malware detection PDF files logistic model tree feature selection cybersecurity