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Secure Communication Scheme based on A New Hyperchaotic System

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Computers, Materials & Continua 2022年第10期73卷 1019-1035页

作者： Khaled Benkouider Aceng Sambas Ibrahim Mohammed Sulaiman Mustafa mamat Kottakkaran Sooppy Nisar Non Destructive Testing Laboratory Automatic DepartmentJijel UniversityBP.9818000JijelAlgeria Department of Mechanical Engineering Universitas Muhammadiyah TasikmalayaTasikmalayaWest Java46196Indonesia School of Quantitative Sciences College of Art and SciencesUniversiti Utara MalaysiaSintok06010KedahMalaysia Faculty of Informatics and Computing Universiti Sultan Zainal AbidinBesut Campus22200Kuala BesutTerengganuMalaysia Department of Mathematics College of Arts and SciencesPrince Sattam bin Abdulaziz UniversityWadi Aldawaser11991Saudi Arabia

This study introduces a new continuous time differential system,which contains ten terms with three quadratic *** new system can demonstrate hyperchaotic,chaotic,quasi-periodic,and periodic behaviors for its different parameter *** theoretical and numerical analysis are investigated to confirm the complex hyperchaotic behavior of our proposed model using many tools that include Kaplan-Yorke dimension,equilibrium points stability,bifurcation diagrams,and Lyapunov *** means of Multisim software,the authors also designed an electronic circuit to confirm our proposed systems’physical *** and Multisim simulation results excellently agree with each other,which validate the feasibility of our new ten terms hyperchaotic system and make it very desirable to use in different domains especially in chaotic-based ***,by employing the drive response synchronisation,we developed a secure communication strategy for the proposed *** from the proposed scheme show that the proposed approach was successful in completing the encryption and decryption procedure.

关键词： Hyperchaotic system synchronization circuit design secure communication system

Vegetation fractional coverage change in a typical oasis region in Tarim River Watershed based on remote sensing

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Journal of Arid Land 2013年第1期5卷 89-101页

作者： Fei ZHANG Tashpolat TIYIP JianLi DING mamat SAWUT Verner Carl JoHNSoN NigaraTASHPoLAT DongWei GUI College of Resources and Environment Science Xinjiang University Urumqi 830046 China Key Laboratory of oasis Ecology Xinjiang University Urumqi 830046 China Department of Physical and Environmental Sciences Colorado Mesa University Grand Junction Colorado 81501 USA Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China Cele National Station of observation & Research for Desert-Grassland Ecosystem in Xinjiang Cele 848300 China

Vegetation fractional coverage （VFC） is an important index to describe and evaluate the ecological system. The vegetation index is widely used to monitor vegetation coverage in the field of remote sensing （RS）. In this paper, the author conducted a case study of the delta oasis of Weigan and Kuqa rivers, which is a typical saline area in the Tarim River Watershed. The current study was based on the TM/ETM＋ images of 1989, 2001, and 2006, and supported by Geographic Information System （GIS） spatial analysis, vegetation index, and dimidiate pixel model. In addition, VBSl （vegetation, bare soil and shadow indices） suitable for TM/ETM＋ irrlages, constructed with FCD （forest canopy density） model principle and put forward by ITTo （International Tropical Timber organization）, was used, and it was applied to estimate the VFC. The estimation accuracy was later prow^n to be up to 83.52%. Further, the study analyzed and appraised the changes in vegetation patterns and revealed a pattern of spatial change in the vegetation coverage of the study area by producing the map of VFC levels in the delta oasis. Forest, grassland, and farmland were the three main land-use types with high and extremely-high coverage, and they played an important role in maintaining the vegetation. The forest area determined the changes of the coverage area, whereas the other two land types affected the directions of change. Therefore, planting trees, protecting grasslands, reclaiming farmlands, and controlling unused lands should be included in a long-term program because of their importance in keeping regional vegetation coverage. Finally, the dynamic variation of VFC in the study area was evaluated according to the quantity and spatial distribution rendered by plant cover diigital images to deeply analyze the reason behind the variation.

关键词： vegetation fractional coverage (VFC) VBSI (vegetation, bare soil and shadow indices) dimidiate pixel model delta oasis of Weigan and Kuqa rivers

The Effects of Thermal Radiation and Viscous Dissipation on the Stagnation Point Flow of a Micropolar Fluid over a Permeable Stretching Sheet in the Presence of Porous Dissipation

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Fluid Dynamics & Materials Processing 2023年第1期19卷 61-81页

作者： Muhammad Salman Kausar H.A.M.Al-Sharifi Abid Hussanan Mustafa mamat Faculty of Informatics and Computing University Sultan Zainal Abidin(Kampus Gong Badak)Kuala TerengganuTerengganuMalaysia Department of Mathematics College of Education for Pure SciencesUniversity of KerbalaKerbalaIraq Department of Mathematics Division of Science and TechnologyUniversity of EducationLahorePakistan

In this paper,the effects of thermal radiation and viscous dissipation on the stagnation–point flow of a micropolar fluid over a permeable stretching sheet with suction and injection are analyzed and discussed.A suitable similarity transformation is used to convert the governing nonlinear partial differential equations into a system of nonlinear ordinary differential equations,which are then solved numerically by a fourth–order Runge–Kutta *** is found that the linear fluid velocity decreases with the enhancement of the porosity,boundary,and suction ***,it increases with the micropolar and injection *** angular velocity grows with the boundary,porosity,and suction parameters,whereas it is reduced if the micropolar and injection parameters become *** is concluded that the thermal boundary layer extension increases with the injection parameter and decreases with the suction parameter.

关键词： Micropolar fluid viscous dissipation stagnation point stretching sheet porous media thermal radiation

Evaluation of the clenbuterol imprinted monolithic column prepared by reversible addition-fragmentation chain transfer polymerization

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Chinese Chemical Letters 2009年第9期20卷 1136-1140页

作者： mamat Turson Xiao Lei Zhuang Hui Na Liu Ping Jiang Xiang Chao Dong College of Chemistry Nankai University Tianjin 300071 China Department of Chemistry Kashgar Teachers College Kashgar 844000 China

To make more homogenous organic monolithic structure, reversible addition-fragmentation chain transfer （RAFT） process was employed in the synthesis of the clenbuterol imprinted polymer. In the synthesis, the influence of synthetic conditions on the polymer structure and separation efficiency was studied. The result demonstrated that the imprinted columns prepared with RAFT process have higher column efficiency and selectivity than the columns prepared with conventional polymerization in the present study, which may result from the higher surface area, smaller pore size and the narrower globule size distribution in their structures. The result indicated that RAFT polymerization provided better conditions for the clenbuterol imprinted monolithic polymer preparation. 2009 Xiang Chao Dong. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： Reversible addition-fragmentation chain transfer polymerization Monolithic column Molecularly imprinted polymer Clenbuterol

The impact of different voltage application modes on biodegradation of chloramphenicol and shift of microbial community structure

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Frontiers of Environmental Science & Engineering 2022年第11期16卷 191-202页

作者： Yifan Liu Qiongfang Zhang Ainiwaer Sidike Nuerla Ailijiang Anwar mamat Guangxiao Zhang Miao Pu Wenhu Cheng Zhengtao Pang Key Laboratory of oasis Ecology of Education Ministry College of Ecology and EnvironmentXinjiang UniversityUrumqi 830017China Xinjiang Jinghe observation and Research Station of Temperate Desert Ecosystem Ministry of EducationUrumqi 830017China School of Geographical Sciences Xinjiang UniversityUrumqi 830017China School of Chemical Engineering and Technology Xinjiang UniversityUrumqi 830017China

Exoelectrogenic biofilms have received considerable attention for their ability to enhance electron transfer between contaminants and electrodes in bioelectrochemical *** this study,we constructed anaerobic-aerobic-coupled upflow bioelectrochemical reactors(Ao-UBERs)with different voltage application modes,voltages and hydraulic retention times(HRTs).In addition,we evaluated their capacity to remove chloramphenicol(CAP).Ao-UBER can effectively mineralize CAP and its metabolites through electrical stimulation when an appropriate voltage is *** CAP removal efficiencies were~81.1%±6.1%(intermittent voltage application mode)and 75.2%±4.6%(continuous voltage application mode)under 0.5 V supply voltage,which were~21.5%and 15.6%greater than those in the control system without voltage applied,*** removal efficiency is mainly attributed to the anaerobic ***-throughput sequencing combined with catabolic pathway analysis indicated that electrical stimulation selectively enriched Megasphaera,Janthinobacterium,Pseudomonas,Emticicia,Zoogloea,Cloacibacterium and Cetobacterium,which are capable of denitrification,dechlorination and benzene ring cleavage,*** study shows that under the intermittent voltage application mode,Ao-UBERs are highly promising for treating antibiotic-contaminated wastewater.

关键词： Electrical stimulation Biodegradation Microbial community Chloramphenicol

Self-templated nitrogen-doped mesoporous carbon decorated with double transition-metal active sites for enhanced oxygen electrode catalysis

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Rare Metals 2020年第7期39卷 824-833页

作者： Meng-Fei Qiao Ying Wang Lei Li Guang-Zhi Hu Guo-An Zou Xamxikamar mamat Ye-Min Dong Xun Hu Key Laboratory of Chemistry of Plant Resources in Arid Regions Xinjiang Technical Institute of Physics and ChemistryChinese Academy of ScienceUrumqi 830011China College of Biological Chemical Sciences and EngineeringJiaxing UniversityJiaxing 314001China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China School of Material Science and Engineering University of JinanJinan 250022China

The development of high-performance,low-cost bifunctional catalysts with long-term stability for the oxygen reduction reaction(oRR)and oxygen evolution reaction(oER)is one of the most critical challenges for the large-scale application of metal-air ***,we report an advanced nitrogen-doped mesoporous carbon(NMC)composite(NiCo2o4/CoNx-NMC)formed from a mixture of Co-and Ni-hydroxide-infiltrated phenolic resin and melamine *** composite exhibits superior electrocatalytic activity,stability,and selectivity for the oRR and *** activity parameter(DE),which is an indicator of the overall catalytic activity of bifunctional catalysts,was 0.76 V for NiCo2o4/***,catalyst outperforms the majority of previously reported non-precious metal-based bifunctional *** remarkable ultra-high catalytic performance of NiCo2o4/CoNx-NMC for the oRR and oER can be attributed to the presence of different active sites of the CoNx structure and the formation of NiCo2o4 with the spinel structure,which was obtained by a stepwise pyrolysis *** synthesis strategy opens a new avenue for the rational design of highly active bifunctional electrocatalysts.

关键词： Bifunctional catalysis oxygen reduction reaction oxygen evolution reaction Pyrolysis strategy Double active sites

Correlation between hardness and SEM-EDS characterization of palm oil waste based biocoke

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Energy Geoscience 2024年第4期5卷 253-266页

作者： Asri Gani Erdiwansyah Hera Desvita Saisa Mahidin Rizalman mamat Zulhaini Sartika Ratna Eko Sarjono Department of Chemical Engineering Universitas Syiah KualaBanda Aceh 23111Indonesia Faculty of Engineering Universitas Serambi MekkahBanda Aceh 23245Indonesia Research Center of Palm oil and Coconut Syiah Kuala UniversityBanda Aceh 23111Indonesia Department of Environment Engineering Universitas Serambi MekkahBanda Aceh23245Indonesia Research Center for Chemistry National Research and Innovation AgencyB.J.Habibie Science and Techno ParkSerpongSouth TangerangBanten15314Indonesia Department of Chemical Engineering Universitas Serambi MekkahBanda Aceh 23245Indonesia Centre for Automotive Engineering Universiti Malaysia Pahang26600PekanMalaysia Department of Chemistry Faculty of Mathematics and ScienceUniversitas Pendidikan IndonesiaBandung40522Indonesia

This research investigates the relationship between hardness and microstructure obtained through SEM-EDS analysis of palm oil waste-based *** mechanical qualities and chemical composition of biocoke are being studied concerning the influence of temperature *** manufacturing temperature of biocoke may vary between 150℃ and 190℃.Utilizing SEM-EDS,we were able to characterize the microstructure and analyze the elemental composition,while the Hardness Shore D approach was used for the most complex *** results highlight the possibility of optimizing production temperature to produce biocoke with better mechanical *** show a positive correlation between biocoke hardness and structured carbon *** 150℃ and 180℃,respectively,the EFB biocoke reached its maximum hardness level of 62±*** 190℃,oPM biocoke generated a 60±5 times greater hardness than that of oPM and oPF *** oPT biocoke sample had the highest porosity with a score of 0.86,or 85.76%.Furthermore,compared to EFB biocoke,oPM and oPF biocokes had a priority of 0.84(84.20%)and 0.83(83.48%),*** hardness is a quality indicator of physical and chemical qualities;the vital link between biocoke hardness,structural features,and elemental composition supports this idea.

关键词： Biocoke Palm oil waste Hardness SEM-EDS Processing temperature

Fast electrons collimating and focusing by an ultraintense laser interacting with a high density layers

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Plasma Science and Technology 2018年第12期20卷 31-38页

作者： Nureli YASEN Chong LV Yajuan HoU Li WANG Feng WAN Moran JIA Ibrahim SITIWALDI Haibo SANG mamat All BAKE Key Laboratory of Beam Technology of the Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875People's Republic of China School of Physics Science and Technology Xinjiang UniversityUrumqi 830046People's Republic of China Beijing Radiation Center Beijing 100875People's Republic of China

The use of a novel double-cone funnel target with high density layers （HDL） to collimate and focus electrons is investigated by two-dimensional particle-in-cell simulations. The proposed scheme can guide, collimate and focus electron beams to smaller sizes. The collimation reasons are analyzed by the quasi-static magnetic fields generation inside the beam collimator with HDL. It is found that the energy conversion efficiency is increased by a factor of 2.2 in this new scheme in comparison with the that without HDL. Such a target structure has potential for design flexibility and prevents inefficiencies in important applications such as fast ignition, etc.

关键词： fast electron transport particle-in-cell (PIC) conversion efficiency double-cone funnel target

Epithelial Layer Estimation Using Curvatures and Textural Features for Dysplastic Tissue Detection

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Computers, Materials & Continua 2021年第4期67卷 761-777页

作者： Afzan Adam Abdul Hadi Abd Rahman Nor Samsiah Sani Zaid Abdi Alkareem Alyessari Nur Jumaadzan Zaleha mamat Basela Hasan Faculty of Information Science and Technology Center for Artificial Intelligence TechnologyUniversiti Kebangsaan MalaysiaBangiSelangor43300Malaysia Faculty of Science and Technology School of Mathematical SciencesUniversiti Kebangsaan MalaysiaBangiSelangor43300Malaysia Department of Information Technology and Computing Faculty of Computer StudiesArab Open UniversityAmmanJordan

Boundary effect in digital pathology is a phenomenon where the tissue shapes of biopsy samples get distorted during the sampling *** morphological pattern of an epithelial layer is greatly ***,the shape deformation model can normalise the distortions,but it needs a 2D *** theory,on the other hand,is not yet tested on digital pathology ***,this work proposed a curvature detection to reduce the boundary effects and estimates the epithelial *** boundary effect on the tissue surfaces is normalised using the frequency of a curve deviates from being a straight *** epithelial layer’s depth is estimated from the tissue edges and the connected nucleolus ***,the textural and spatial features along the estimated layer are used for dysplastic tissue *** proposed method achieved better performance compared to the whole tissue regions in terms of detecting dysplastic *** result shows a leap of kappa points from fair to a substantial agreement with the expert’s ground truth *** improved results demonstrate that curvatures have been effective in reducing the boundary effects on the epithelial layer of ***,quantifying and classifying the morphological patterns for dysplasia can be *** textural and spatial features on the detected epithelial layer can capture the changes in tissue.

关键词： Digital pathology grading dysplasia tissue boundary effect