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A low complexity online controller using fuzzy logic in energy harvesting WSNs

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Science China(Information Sciences) 2019年第4期62卷 167-176页

作者： talha AZFAR Waqas AHMED Abdul HASEEB Rizwan AHMAD Sufi Tabassum GUL Fu-Chun ZHENG Department of Electrical Engineering Pakistan Institute of Engineering and Applied Sciences (PIEAS) School of Electrical Engineering and Computer Science National University of Sciences and Technology (NUST) School of Electronic and Information Engineering Harbin Institute of Technology

In this paper, we present a fuzzy logic based scheme for a two hop energy harvesting(EH)wireless sensor network(WSN). Incorporating data and energy causality constraints, discrete transmission rates, finite energy and data buffers, a fuzzy model is developed which uses network throughput, battery level and channel gain as inputs. The fuzzy scheme is then compared with optimum, modified optimum, and Markov decision process(MDP) schemes in terms of computational complexity, throughput, battery level and data buffer capacity. The throughput results show that the fuzzy online scheme preforms closely to the compared schemes and avoids battery depletion even when the number of discrete transmission rates are increased.

关键词： wireless sensor networks energy harvesting cooperative communications fuzzy logic

All-reflective optical system design for extreme ultraviolet lithography

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Chinese Optics Letters 2010年第11期8卷 1082-1084页

作者：常军邹美芳王蕊瑞冯树龙 M.M.talha Laboratory of Optoelectronics Technology and Information System School of OptoelectronicsBeijing Institute of Technology Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of Sciences IICS P.O.Box No.1384IslamaabadPakista

All-reflective optical systems,due to their material absorption and low refractive index,are used to create the most suitable devices in extreme ultraviolet lithography （EUVL）.In this letter,we present a design for an all-reflective lithographic projection *** also discuss its design idea and structural *** analysis of the four-mirror optical system,the initial structural parameters are determined,the optical system is optimized,and the tolerances of the system are *** also show the implementation of optimal layout and desired imaging performance.

关键词： Design Extreme ultraviolet lithography Optimization Refractive index Systems analysis

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Experimental Analysis and Damage Modeling of High-Density Polyethylene under Fatigue Loading

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Acta Mechanica Solida Sinica 2016年第2期29卷 133-144页

作者： A.Djebli M.Bendouba A.Aid A.talha N.Benseddiq M.Benguediab LPQ3M Faculte des sciences et des technologies Universite de Mustapha Stambouli Alegria LML Departement de Genie mecanique Universite Lille-l France HEI Ecole des hautes etudes d'ingdnieurs France Faculte de Technologie Universite de Sidi Bel Abess Alegria

In this study,an experimental analysis for determining the fatigue strength of HDPE-100 under cyclic loading is *** curve of cumulative fatigue damage versus number of cycles（D-N） was deduced from stiffness *** on the three stage damage trend,the remaining fatigue life is numerically predicted by considering a double term power damage accumulation *** model is found to be accurate,both in modeling the rapid damage growth in the early life and near the end of the fatigue *** results illustrate that the proposed model is capable of accurately fitting several different sets of experimental data.

关键词： HDPE semi-crystalline damage accumulation stiffness degradation

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Impact of vitamin D on the hospitalization rate of Crohn's disease patients seen at a tertiary care center

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World Journal of Gastroenterology 2017年第14期23卷 2539-2544页

作者： Krishna VR Venkata Sumant S Arora Feng-Long Xie talha A Malik Department of Internal Medicine University of Alabama at Birmingham Montgomery Health Center Department of Medicine-Gastroenterology University of Alabama at Birmingham

AIM To study the association between vitamin D level and hospitalization rate in Crohn's disease(CD) *** We designed a retrospective cohort study using adult patients(> 19 years) with CD followed for at least one year at our inflammatory bowel disease center. Vitamin D levels were divided into: low mean vitamin D level(< 30 ng/m L) vs appropriate mean vitamin D level(30-100 ng/m L). Generalized Poisson Regression Models(GPR) for Rate Data were used to estimate partially adjusted and fully adjusted incidence rate ratios(IRR) of hospitalization among CD patients. We also examined IRRs for vitamin D level as a continuous *** Of the 880 CD patients, 196 patients with vitamin D level during the observation period were included. Partially adjusted model demonstrated that CD patients with a low mean vitamin D level were almost twice more likely to be admitted(IRR = 1.76, 95%CI: 1.38-2.24) compared to those with an appropriate vitamin D level. The fully adjusted model confirmed this association(IRR = 1.44, 95%CI: 1.11-1.87). Partially adjusted model with vitamin D level as a continuous variable demonstrated,higher mean vitamin D level was associated with a 3% lower likelihood of admission with every unit(ng/m L) rise in mean vitamin D level(IRR = 0.97, 95%CI: 0.96-0.98). The fully adjusted model confirmed this association(IRR = 0.98, 95%CI: 0.97-0.99). CONCLUSION Normal or adequate vitamin D stores may be protective in the clinical course of CD. However, this role needs to be further characterized and understood.

关键词： Crohn’s disease Vitamin D Vitamin D deficiency Hospitalization rate Inflammatory bowel disease

Integration of 1D and 3D modeling schemes to establish the Farewell Formation as a self-sourced reservoir in Kupe Field,Taranaki Basin, New Zealand

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Frontiers of Earth Science 2021年第3期15卷 631-648页

作者： S.M.talha QADRI Md Aminul ISLAM Mohamad Ragab SHALABY Syed Haroon ALI Department of Earth Sciences University of Toronto Geosciences Program Faculty of Science Universiti Brunei Darussalam Geology Department Faculty of Science Tanta University Department of Earth Sciences University of Sargodha

Along with conventional methods, this paper proposed a method in which 1 D and 3 D models are integrated to identify the self-sourced reservoir potential of the Farewell Formation in the Kupe Gas Field within the Taranaki Basin, New Zealand. Source rock characteristics were evaluated at both field and basin scales by investigating source rock maturity, type of organic matter,and hydrocarbon generation potential by rock pyrolysis,using Rock-Eval 2 and 6. The 1 D thermal and burial history model established the rate of sedimentation and thermal history of the Kupe 4 well. Reservoir characterization at field-scale was determined by seismic interpretation, well log analysis, and 3 D structural and petrophysical models. The sediments of the Farewell Formation contain types II-III（oil/gas prone） and type III（gas prone） and have fair-to-excellent generation potential. The oxygen and hydrogen indices ranged from 3 to 476 mg CO2/g TOC and 26 to 356 mg HC/g TOC, respectively, whereas the thermal maturity determined by vitrinite reflectance values ranged between 0.3% and 0.72%, indicating that the Farewell Formation is in immature-to-mature hydrocarbon generation stage. Thus, Farewell Formation was verified to be a good source rock. Additionally, structural interpretations demonstrated the structural complexity of an extensional and contractional regime within the reservoir package. Multiple faults indicated a good reservoir property there with a trapping mechanism as well as migration paths. A well-log-based petrophysical analysis established the presence of up to 70% hydrocarbon saturation within the pore spaces of Farewell *** 3 D models confirmed that the Farewell Formation has significant sand zones and hydrocarbon-saturated zones,thereby proving its very good reservoir characteristics. It has been proved that the 1 D and 3 D structural schemes,integrated with geological techniques, was vital in identifying the Kupe Field as a self-sourced reservoir.

关键词： self-sourced reservoir Kupe Field Farewell Formation Taranaki Basin

Phase-field model of pitting corrosion kinetics in metallic materials

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npj Computational Materials 2018年第1期4卷 330-338页

作者： talha Qasim Ansari Zhihua Xiao Shenyang Hu Yulan Li Jing-Li Luo San-Qiang Shi Department of Mechanical Engineering The Hong Kong Polytechnic University11 Yuk Choi RoadHung HomKowloonHong Kong Pacific Northwest National Laboratory RichlandWA 99352USA Department of Chemical and Materials Engineering University of AlbertaEdmontonAB T6G 2R3Canada

Pitting corrosion is one of the most destructive forms of corrosion that can lead to catastrophic failure of *** study presents a thermodynamically consistent phase field model for the quantitative prediction of the pitting corrosion kinetics in metallic *** order parameter is introduced to represent the local physical state of the metal within a metal-electrolyte *** free energy of the system is described in terms of its metal ion concentration and the order *** the ion transport in the electrolyte and the electrochemical reactions at the electrolyte/metal interface are explicitly taken into *** temporal evolution of ion concentration profile and the order parameter field is driven by the reduction in the total free energy of the system and is obtained by numerically solving the governing equations.A calibration study is performed to couple the kinetic interface parameter with the corrosion current density to obtain a direct relationship between overpotential and the kinetic interface *** phase field model is validated against the experimental results,and several examples are presented for applications of the phase-field model to understand the corrosion behavior of closely located pits,stressed material,ceramic particles-reinforced steel,and their crystallographic orientation dependence.

关键词： corrosion pitting steel

A Hybrid Approach for Network Intrusion Detection

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Computers, Materials & Continua 2022年第1期70卷 91-107页

作者： Mavra Mehmood talha Javed Jamel Nebhen Sidra Abbas Rabia Abid Giridhar Reddy Bojja Muhammad Rizwan Department of Computer Science Kinnaird College for WomenLahore54000Pakistan ASET Labs IslamabadPakistan Prince Sattam bin Abdulaziz University College of Computer Science and EngineeringAlkharj11942Saudi Arabia College of Business and Information Systems Dakota State UniversityMadisonUnited States of America

Due to the widespread use of the internet and smart devices,various attacks like intrusion,zero-day,Malware,and security breaches are a constant threat to any organization’s network ***,a Network Intrusion Detection System(NIDS)is required to detect attacks in network *** paper proposes a new hybrid method for intrusion detection and attack *** proposed approach comprises three steps to address high false and low false-negative rates for intrusion detection and attack *** the first step,the dataset is preprocessed through the data transformation technique and min-max ***,the random forest recursive feature elimination method is applied to identify optimal features that positively impact the model’s ***,we use various Support Vector Machine(SVM)types to detect intrusion and the Adaptive Neuro-Fuzzy System(ANFIS)to categorize probe,U2R,R2U,and DDOS *** validation of the proposed method is calculated through Fine Gaussian SVM(FGSVM),which is 99.3%for the binary *** Square Error(MSE)is reported as 0.084964 for training data,0.0855203 for testing,and 0.084964 to validate multiclass categorization.

关键词： Network security intrusion detection system machine learning attacks data mining classification feature selection

Multi-scale visual analysis of cycle characteristics in spatially-embedded graphs

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Visual Informatics 2023年第3期7卷 49-58页

作者： Farhan Rasheed talha Bin Masood Tejas G.Murthy Vijay Natarajan Ingrid Hotz Department of Science and Technology LinkOing UniversityBredgatan 33NorrkOing60221Sweden Department of Civil Engineering Indian Institute of ScienceBangalore560012India Department of Computer Science and Automation Indian Institute of ScienceBangalore560012India

We present a visual analysis environment based on a multi-scale partitioning of a 2d domain intoregions bounded by cycles in weighted planar embedded *** work has been inspired by anapplication in granular materials research,where the question of scale plays a fundamental role inthe analysis of material *** propose an efficient algorithm to extract the hierarchical cyclestructure using persistent *** core of the algorithm is a filtration on a dual graph exploitingAlexander’s *** resulting partitioning is the basis for the derivation of statistical properties thatcan be explored in a visual *** demonstrate the proposed pipeline on a few syntheticand one real-world dataset.

关键词： Visual data analysis Planar graph Force network Granular materials Persistence homology Force loops Computational geometry

Microstructure,wear and corrosion performance of plasma electrolytic oxidation coatings formed on D16T Al alloy

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Rare Metals 2020年第12期39卷 1425-1439页

作者： Wan-Ying Liu Ying Liu Carsten Blawert Mikhail-L.Zheludkevich Chun-Ling Fan Mohd talha Yuan-Hua Lin College of Materials Science and Engineering Sichuan UniversityChengdu 610065China School of New Energy and Materials Southwest Petroleum UniversityChengdu 610500China Helmholtz-Zentrum Geesthacht Zentrum fur Material-und Küstenforschung GmbH.Institute of Materials Research Geesthacht 21502Germany Chongqing Xinyu Pressure Vessel Manufacturing Co. Ltd..Chongqing 402560China

The plasma electrolytic oxidation(PEO)coatings were produced on D16 T Al alloy in the aluminate and silicate electrolyte with and without *** phase composition,microstructure and elemental distribution of the coatings were tested by X-ray diffraction(XRD),scanning electron microscope(SEM)and energy dispersive X-ray spectroscopy(EDX).The wear and corrosion resistance of PEO coatings were evaluated by dry sliding wear tests and electrochemical impedance spectroscopy(EIS).The morphology feature of the wear tracks was compared and analyzed by SEM and three-dimensional *** results demonstrate that the structure,wear and corrosion resistance of PEO coatings with graphene are better than that of PEO coatings without *** coating fabricated in the aluminate electrolyte with graphene exhibited the lowest *** coated samples formed in silicate electrolyte with graphene displayed the thickest,densest and the most compact *** exhibited the best wear and corrosion resistance due to the incorporation mode of graphene in the *** mechanism of graphene improving the wear and corrosion resistance of PEO coating was further *** summary,the comprehensive performances of PEO coatings formed in silicate electrolyte on D16 T Al alloy are superior to that produced in aluminate electrolyte.

关键词： PEO coatings D16T Al alloy Graphene Wear Corrosion

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