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Performance of hot-mix asphalt using polymer-modified bitumen and marble dust as a filler

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Journal of Traffic and Transportation Engineering(English Edition) 2023年第3期10卷 385-398页

作者： Diyar khan Rawid khan Muhammad Tariq khan Muhammad Alam Tanveer Hassan Department of Civil Engineering University of Engineering and TechnologyPeshawarPakistan Faculty of Transport and Aviation Engineering Silesian University of TechnologyKatowice 40-019Poland Department of Civil Engineering University of Engineering and TechnologyMardanPakistan Department of Built Environment and Architecture London South Bank UniversityLondon SE10AAUK

Marble dust waste powder generated by the marble cutting industry has a high *** this research,the use of marble dust(MD)as a mineral filler substitute in hot mixed asphalt(HMA)was *** Marshall mix design was used to determine the optimum bitumen content(OBC)for all of the *** each of the four MD contents,i.e.,0,2%,4%,and 6%by weight of the total aggregates,four different bitumen percentages were *** results of the Marshall stability test showed that the optimum filler content was 4%*** were prepared with 0 MD in the control mix and varying percentages of MD as an alternate *** addition,MD aided in increasing the Marshall stability,rutting resistance,and permanent deformation and reduced the fatigue life of asphalt *** the percentage of MD increases,the rutting resistance and stiffness at high temperatures both *** the percentage of MD increases,the fatigue life *** resistance in high-temperature conditions can be improved by using MD in HMA as a partial substitute for stone dust(SD).In areas where extensive MD waste is present,MD can be incorporated into HMA mixtures instead of conventional fillers.

关键词： Asphalt mixture Marble dust Wheel tracker test Dynamic modulus test Four-point fatigue beam test

Interdependence of friction, wear, and noise: A review

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Friction 2021年第6期9卷 1319-1345页

作者： Kevin LONTIN Muhammad khan Cranfield University MK430ALUK

Phenomena of friction,wear,and noise in mechanical contacts are particularly important in the field of tribomechanics but equally complex if one wants to represent their exact relationship with mathematical *** have been made to describe these phenomena with different approaches in *** efforts have been compiled in different reviews but most of them treated friction,wear mechanics,and acoustic noise ***,an in-depth review that provides a critical analysis on their interdependencies is still *** this review paper,the interdependencies of friction,wear,and noise are analysed in the mechanical contacts at asperitical *** origin of frictional noise,its dependencies on contact’s mechanical properties,and its performance under different wear conditions are critically reviewed.A discussion on the existing mathematical models of friction and wear is also provided in the last section that leads to uncover the gap in the existing *** review concludes that still a comprehensive analytical modelling approach is required to relate the interdependencies of friction,noise,and wear with mathematical expressions.

关键词： noise acoustic emission wear friction

Environmental sustainability of grey water footprints in Peshawar Basin:Current and future reduced flow scenarios for Kabul River

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International Journal of Agricultural and Biological Engineering 2019年第4期12卷 162-168页

作者： Tariq khan Hizbullah khan Department of Environmental Sciences University of Haripur22640Pakistan Department of Environmental Sciences University of Peshawar25000Pakistan

Assessing water pollution at basin level is a challenging *** this study,the environmental sustainability of grey water footprints(WFgrey)of Peshawar Basin in Pakistan was *** release of nitrogen(N)and phosphorus(P)from point and non-point sources during the period 1986 to 2015 were *** pollution level(WPL)for normal and 10%-50%future reduced runoff in Kabul River as a result of construction of dams was *** described in Water Footprint Assessment Manual and Grey Water Footprint Accounting Guidelines were *** showed that 30-year annual average of N and P discharges were 24.5×10^(3)t/a and 10.9×10^(4)t/a *** discharge of N and P from non-point sources contribute 97%and 99%respectively.N related WFgrey was 50×10^(8)m^(3)/a and 50×10^(9)m^(3)/a for *** of N was within the sustainable limit for all reduced runoff scenarios while P-related WPL for normal runoff exceeded sustainable limits and was worse in each reduced runoff *** study confirms the deteriorated water quality of Kabul River and the findings may be helpful for future planning and water resource management of the basin.

关键词： sustainability grey water footprint nitrogen phosphorus water pollution Kabul River Pakistan

Stokes' First Problem for an MHD Burgers Fluid

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Communications in Theoretical Physics 2013年第1期59卷 99-104页

作者： Masood khan Department of Mathematics Quaid-i-Azam University

This work is related to the flow of a magnetohydrodynamic Burgers *** flow of an incompressible conducting Burgers fluid in the presence of a uniform transverse magnetic field over a plate that is moved suddenly is *** the application of the Laplace and Fourier sine transforms techniques,the exact analytical expressions for the velocity field and associated shear stress are determined in simple *** are written as a sum of steady-state and transient *** graphical results are plotted for different values of indispensable parameters and some interesting results are *** corresponding solutions for the hydrodynamic Burgers fluid appear as the limiting cases of the obtained solutions.

关键词： Stokes' first problem Burgers fluid Laplace and Fourier sine transforms exact solutions

Monte-Carlo simulation of a stochastic differential equation

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Plasma Science and Technology 2017年第12期19卷 6-14页

作者： Arif ULLAH Majid khan M KAMRAN R khan 盛正卯 Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230026People's Republic of China Department of Physics Quaid-i-Azam University Islamabad Pakistan Department of Physics Institute of Fusion Theory and SimulationsZhejiang UniversityHangzhou 310027People's Republic of China Department of Physics COMSATS Institute of Information TechnologyChack ShahzadIslamabadPakistan Department of Physics Abdul Wali Khan University23200 MardanKPKPakistan

For solving higher dimensional diffusion equations with an inhomogeneous diffusion coefficient,Monte Carlo（MC） techniques are considered to be more effective than other algorithms, such as finite element method or finite difference method. The inhomogeneity of diffusion coefficient strongly limits the use of different numerical techniques. For better convergence, methods with higher orders have been kept forward to allow MC codes with large step size. The main focus of this work is to look for operators that can produce converging results for large step sizes. As a first step, our comparative analysis has been applied to a general stochastic ***, our formulization is applied to the problem of pitch angle scattering resulting from Coulomb collisions of charge particles in the toroidal devices.

关键词： Monte-Carlo simulation stochastic differential equations toroidal plasmas numerical methods

Investigating the Effectiveness of Road-related Mitigation Measures under Semi-controlled Conditions:A Case Study on Asian Amphibians

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Asian Herpetological Research 2019年第1期10卷 62-68页

作者： Yun WANG Jiayu LAN Hongping ZHOU Lei GUAN Yudi WANG Yongshun HAN Jiapeng QU Syed asifullah SHAH Yaping KONG China Academy of Transportation Sciences Jilin Agricultural University Hunan University of Science and Technology Key Laboratory of Adaptation and Evolution of Plateau Biota Northwest Institute of Plateau Biology Chinese Academy of Sciences Qinghai Provincial Key Laboratory of Animal Ecological Genomics Department of Ornamental Horticulture and Landscape Architecture College of Horticulture China Agricultural University

Road traffic is the main factor causing the decline in amphibian populations worldwide. The proper design of an amphibian tunnel is one of the most efficient measures to mitigate the negative impacts of road traffic on amphibians. However, no study has investigated the effectiveness of amphibian tunnels under semi-controlled conditions in Asian amphibians. Here, we selected two representative amphibian species, the Chinese brown frog, Rana chensinensis, and the Asiatic toad, Bufo gargarizans, which suffer the most severe road mortality along the roads in Northeast China. We placed experimental arrays of culverts of various sizes(diameters of 1.5, 1, and 0.5 m for circular culverts; side lengths of 1.5, 1, and 0.5 m for box culverts), and substrate type(soil, concrete, and metal) to examine the preferences of both species during the migratory season between May and September in 2016 and 2017. The results revealed that the Chinese brown frog preferred mid-and large-sized culverts as well as soil culverts. We concluded that culverts with a side length ≥ 1 m, lined with soil, and accompanied by a ≥ 0.4 m high guide drift fence and ≤ 45° gradient on the roadside ditch wall would best facilitate road crossings for both species and likely for other amphibian species in Northeast China.

关键词： amphibian tunnels crossing structure drift fence highway roadside ditch road ecology

Sentiment Analysis of Low-Resource Language Literature Using Data Processing and Deep Learning

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Computers, Materials & Continua 2024年第4期79卷 713-733页

作者： Aizaz Ali Maqbool khan Khalil khan Rehan Ullah khan Abdulrahman Aloraini Department of IT and Computer Science Pak-Austria Fachhochschule:Institute of Applied Sciences and TechnologyHaripur22620Pakistan Software Competence Center Hagenberg Softwarepark 32aHagenberg4232Austria Department of Computer Science School of Engineering and Digital SciencesNazarbayev UniversityAstana010000Kazakhstan Department of Information Technology College of ComputerQassim UniversityP.O.Box 1162BuraydahSaudi Arabia

Sentiment analysis, a crucial task in discerning emotional tones within the text, plays a pivotal role in understandingpublic opinion and user sentiment across diverse *** numerous scholars conduct sentiment analysisin widely spoken languages such as English, Chinese, Arabic, Roman Arabic, and more, we come to grapplingwith resource-poor languages like Urdu literature which becomes a challenge. Urdu is a uniquely crafted language,characterized by a script that amalgamates elements from diverse languages, including Arabic, Parsi, Pashtu,Turkish, Punjabi, Saraiki, and more. As Urdu literature, characterized by distinct character sets and linguisticfeatures, presents an additional hurdle due to the lack of accessible datasets, rendering sentiment analysis aformidable undertaking. The limited availability of resources has fueled increased interest among researchers,prompting a deeper exploration into Urdu sentiment analysis. This research is dedicated to Urdu languagesentiment analysis, employing sophisticated deep learning models on an extensive dataset categorized into fivelabels: Positive, Negative, Neutral, Mixed, and Ambiguous. The primary objective is to discern sentiments andemotions within the Urdu language, despite the absence of well-curated datasets. To tackle this challenge, theinitial step involves the creation of a comprehensive Urdu dataset by aggregating data from various sources such asnewspapers, articles, and socialmedia comments. Subsequent to this data collection, a thorough process of cleaningand preprocessing is implemented to ensure the quality of the data. The study leverages two well-known deeplearningmodels, namely Convolutional Neural Networks (CNN) and Recurrent Neural Networks (RNN), for bothtraining and evaluating sentiment analysis performance. Additionally, the study explores hyperparameter tuning tooptimize the models’ efficacy. Evaluation metrics such as precision, recall, and the F1-score are employed to assessthe effectiv

关键词： Urdu sentiment analysis convolutional neural networks recurrent neural network deep learning natural language processing neural networks

Robust Half-Metallicity and Magnetic Properties of Cubic Perovskite CaFeO_(3)

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Chinese Physics Letters 2013年第4期30卷 192-196页

作者： Zahid Ali Iftikhar Ahmad Banaras khan Imad khan Materials Modeling Center Department of PhysicsUniversity of MalakandChakdaraDir(L)Pakistan Department of Physics Hazara UniversityMansehraPakistan

Theoretical studies of the cubic perovskite CaFeO3 are performed using the full potential linearized augmented plane-wave method with GGA+*** calculated structural parameters are consistent with the experimental *** tolerance factor reveals the cubic phase of the *** spin polarized electronic band structures and densities of states as well as the integer value of the magnetic moment of the unit cell(4μB)demonstrate that CaFeO_(3)is half *** in CaFeO_(3)is due to Fe^(+4)–O^(2)–Fe^(+4)superexchange *** robust properties of the compound show that with their compression up to a certain critical lattice constant,known as the robust transition lattice constant,an abrupt change in the electronic and magnetic properties occurs;the compounds lose their integer magnetic moment and become metallic.

关键词： integer cubic magnetic

Bio-capped and green synthesis of ZnO/g-C_(3)N_(4) nanocomposites and its improved antibiotic and photocatalytic activities: An exceptional approach towards environmental remediation

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Chinese Journal of Chemical Engineering 2023年第4期56卷 215-224页

作者： Iltaf khan Chunjuan Wang Shoaib khan Jinyin Chen Aftab khan Sayyar Ali Shah Aihua Yuan Sohail khan Mehwish KButt Humaira Asghar School of Environmental&Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China College of Agriculture Shihezi UniversityShihezi 832003China Key Laboratory of Biology and Genetic Improvement of Horticultural Crops Northeast Agricultural UniversityHarbin 150030China Jiangxi Key Laboratory for Postharvest Technology and Nondestructive Testing of Fruits and Vegetables College of AgronomyJiangxi Agricultural UniversityNanchang 330045China Department of Pharmacy University of SwabiKhyber Pakhtunkhwa 94640Pakistan Department of Physics University of Agriculture FaisalabadFaisalabad 38040Pakistan Department of Chemistry Government College University FaisalabadFaisalabad 38000Pakistan

In this research study, we have synthesized the bio-capped ZnO/g-C_(3)N_(4) nanocomposites by employing lemon juice(Citrus limon) as a stabilizer and mediator. Fruitfully, lemon juice which contains various acidic functional groups and citric acid has the capability to block the surface of g-C_(3)N_(4) from chemical reactivity and activated the surface of g-C_(3)N_(4) for various reactions. Consequently, the agglomeration behavior and controlled shape of g-C_(3)N_(4) has also been achieved. Our experimental results i.e. XRD,TEM, HRTEM, PL, FS, XPS, and PEC have confirmed that the lemon juice mediated and green g-C_(3)N_(4)(L-CN) have good performances and remarkable visible light photocatalytic activities as compared to the chemically synthesized g-C_(3)N_(4)(CN). Furthermore, the small surface area and low charge separation of g-C_(3)N_(4) is upgraded by coupling with Zn O nanoparticles. It is proved that the coupling of Zn O worked as a facilitator and photoelectron modulator to enhance the charge separation of g-C_(3)N_(4). Compared to pristine lemon-mediated green g-C_(3)N_(4)(L-CN), the most active sample 5Zn O/L-CN showed ~ 5-fold improvement in activities for ciprofloxacin(CIP) and methylene blue(MB) degradation. More specifically,the mineralization process and degradation pathways, and the mineralization process of ciprofloxacin(CIP) and methylene blue(MB) are suggested. Finally, our present novel research work will provide new access to synthesize the eco-friendly and bio-caped green g-C_(3)N_(4)nanomaterials and their employment for pollutants degradation and environmental purification.

关键词： Bio-caped green g-C_(3)N_(4) Lemon juice mediators ZnO/g-C_(3)N_(4)nanocomposite Environmental remediation Degradation pathways