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Investigation of material composition,design,and performance of open-graded asphalt mixtures for semi-flexible pavement:A comprehensive experimental study

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Journal of Traffic and Transportation Engineering(English Edition) 2024年第1期11卷 92-116页

作者： mohammad Taghipoor Abolfazl Hassani mohammad M.Karimi Department of Civil and Environmental Engineering Tarbiat Modares UniversityTehranIran

The primary goal of this study is the design and construction of semi-flexible pavement(SFP)mixture in accordance with the engineering and mechanical *** study involves the use of a range of gradation curves,air void contents,cellulose and synthesized fibers,and neat and modified asphalt binders to prepare the open-graded asphalt(OGA)*** analyze the characteristics of these mixtures,a variety of test,namely binder drainage,semi-circular bending(SCB),Cantabro,wheel tracking,indirect tensile strength(ITS),and permeability tests were ***,to analyze the prepared grouting material,flexural strength,compressive strength,and fluidity tests were *** the final stage,SFP was compared to HMA in terms of engineering characteristics and *** to the results,SFP was more resistant to skid,rutting,fire,and moisture damage,while HMA had a better performance in fracture tests,including SCB *** to the results of the mechanical performance tests conducted on OGA mixtures,the highest and lowest values for air void content to achieve the highest mechanical performance level were 30%-35%and 25%,***,based on the laboratory results,it was determined that the required void ratio for constructing OGA mixtures was 24%-26%based on the bitumen type and fibers amount in the ***,SFP mixture can be regarded as a viable alternative to common pavements thanks to its high resistance to rutting and moisture damage,long freezing-thawing fatigue life,and adequate fire and skid resistance.

关键词： Semi-flexible pavement mixture Open-graded asphalt mixture Engineering properties Cantabro test Hot mix asphalt

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Evaluation of attraction terms in equations of state on the prediction of solubility of some biomolecules in supercritical carbon dioxide

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Chinese Chemical Letters 2009年第4期20卷 501-505页

作者： mohammad Reza Bozorgmehr mohammad Reza Housaindokht Department of Chemistry Faculty of Science.Islamic Azad UniversityMashad BranchMashhadIran Department of Chemistry Faculty of ScienceFerdowsi University of MashhadMashadIran

In the present work, effect of the attraction terms of four recently modified Peng-Robinson （MPR） equations of state on the prediction of solubility of caffeine, cholesterol, uracil and erythromycin was studied. The attraction terms of two of these equations are linear relative to the acentric factor and for the other two are exponential. It is found that the later show less deviation. Also interaction parameters for the studied systems are obtained and the percentage of average absolute relative deviation （%AARD） in each calculation is displayed.

关键词： Equation of state Solubility Supercritical carbon dioxide Biomolecules

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ECO-FRIENDLY FAST SYNTHESIS AND THERMAL DEGRADATION OF OPTICALLY ACTIVE POLYAMIDES UNDER MICROWAVE ACCELERATING CONDITIONS

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Chinese Journal of Polymer Science 2010年第5期28卷 685-694页

作者： Shadpour Mallakpour mohammad Dinari Organic Polymer Chemistry Research Laboratory Department of ChemistryIsfahan University of TechnologyIsfahan 84156-83111I.R.Iran

An optically active bulky aromatic diacid chiral monomer, （2S）-4-[（4-methyl-2-phthalimidylpentanoylamino）benzoylamino]isophthalic acid （1）, containing a rigid phthalimide and flexible L-leucine pendent group was synthesized in five steps. A fast and clean method for direct polyamidation reaction of monomer 1 with various aromatic diamines under microwave irradiation and conventional heating was performed. The polymerization reactions provided optically active polyamides with high yields and inherent viscosities in the range of 0.36-0.74 dL/g. Their thermal properties were evaluated by thermogravimetric analysis （TGA） and differential scanning calorimetry. TGA thermograms show that the polymers are thermally stable, 10% weight loss temperatures are in excess of 385℃, and char yields at 800℃ are higher than 56%. The data obtained from TGA were used to study the kinetics of thermal decomposition of the resulting polymers. The interpretation of kinetic parameters （E, AH, AS and AG） of thermal decomposition stages was evaluated using Coats and Redfern equation.

关键词： Optically active polyamides Amino acid Microwave irradiation Kinetic study Polycondensation.

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Proportional integral derivative controller design using Legendre orthogonal functions

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Journal of Central South University 2016年第10期23卷 2616-2629页

作者： Reza Moradi mohammad Tabatabaei Department of Electrical Engineering Khomeinishahr Branch Islamic Azad University

The Legendre orthogonal functions are employed to design the family of PID controllers for a variety of plants. In the proposed method, the PID controller and the plant model are represented with their corresponding Legendre series. Matching the first three terms of the Legendre series of the loop gain with the desired one gives the PID controller parameters. The closed loop system stability conditions in terms of the Legendre basis function pole(λ) for a wide range of systems including the first order, second order, double integrator, first order plus dead time, and first order unstable plants are obtained. For first order and double integrator plants, the closed loop system stability is preserved for all values of λ and for the other plants, an appropriate range in terms of λ is obtained. The optimum value of λ to attain a minimum integral square error performance index in the presence of the control signal constraints is achieved. The numerical simulations demonstrate the benefits of the Legendre based PID controller.

关键词： PID controllers orthogonal functions legendre functions moment matching PI controller PD controller

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Predicting Code Smells and Analysis of Predictions: Using Machine Learning Techniques and Software Metrics

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Journal of Computer Science & Technology 2020年第6期35卷 1428-1445页

作者： mohammad YMhawish Manjari Gupta Computer Science Centre for Interdisciplinary Mathematical SciencesInstitute of ScienceBanaras Hindu University Varanasi 221005India

Code smell detection is essential to improve software quality, enhancing software maintainability, and decrease the risk of faults and failures in the software system. In this paper, we proposed a code smell prediction approach based on machine learning techniques and software metrics. The local interpretable model-agnostic explanations (LIME) algorithm was further used to explain the machine learning model's predictions and interpretability. The datasets obtained from Fontana et al. were reformed and used to build binary-label and multi-label datasets. The results of 10-fold cross-validation show that the performance of tree-based algorithms (mainly Random Forest) is higher compared with kernel-based and network-based algorithms. The genetic algorithm based feature selection methods enhance the accuracy of these machine learning algorithms by selecting the most relevant features in each dataset. Moreover, the parameter optimization techniques based on the grid search algorithm significantly enhance the accuracy of all these algorithms. Finally, machine learning techniques have high potential in predicting the code smells, which contribute to detect these smells and enhance the software's quality.

关键词： code smell code smell detection feature selection prediction explanation parameter optimization

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Innovative configuration of vertical slot fishway to enhance fish swimming conditions

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Journal of Hydrodynamics 2022年第5期34卷 917-933页

作者： mohammad Ahmadi Alban Kuriqi Hossein mohammad Nezhad Amir Ghaderi Mirali mohammadi Department of Civil Engineering Faculty of EngineeringShabestar BranchIslamic Azad UniversityShabestarIran CERIS Instituto Superior TécnicoUniversidade de LisboaLisbonPortugal Civil Engineering Department University for Business and TechnologyPristinaKosovo Department of Civil Engineering Faculty of EngineeringUrmia UniversityUrmiaIran Department of Civil Engineering Faculty of EngineeringUniversity of ZanjanZanjanIran

A vertical slot fishway(VSF)is among the most effective and commonly used fishway structures to enable fish to pass through artificial barriers such as dams and weirs in the ***,such structures need further improvements in providing better swimming conditions for fish inside the pool and enhancing attraction at the ***,the main objective of this study was to investigate the influence of slope and whether integrating some cylinder structures inside the fishway could enhance further attraction and provide better swimming conditions for *** study consists of several numerical simulations,first considering the fishway without cylinder elements while testing three different slopes under two different ***,the same numerical simulations were conducted,considering cylinder elements of different diameters and arrangements inside the *** numerical model was validated by comparing computed velocities with those measured experimentally from the *** results show that the maximum velocity and turbulent kinetic energy(TKE)in the main jet increase as the discharge increases on the same *** flow velocity and TKE decrease in the areas inside the pool and between the two *** cylinder elements inside the fishway reduces the principal flow’s maximum ***,inside the pool,low-velocity regions were expanding.A comparison between the design with a cylinder and the simple VSF indicates that the presence of a cylinder reduced the maximum velocities for the smallest and highest slopes by 6.21%and 9.86%on average,***,in terms of TKE,cylinders inside the fishway could provide better performance than simple VSF,mainly for low-flow ***,this study’s solution-oriented findings provide insights that could help design cost-effective fishways by improving particularly fish attraction to the fishway.

关键词： Ecohydraulic energy dissipation fish-pass fishway turbulent kinetic energy(TKE)

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DEA/TEAOH templated synthesis and characterization of nanostructured NiAPSO-34 particles:Effect of single and mixed templates on catalyst properties and performance in the methanol to olefin reaction

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Particuology 2015年第2期13卷 69-81页

作者： Parisa Sadeghpour mohammad Haghighi Chemical Engineering Faculty Sahand University of Technology Reactor and Catalysis Research Center(RCRC) Sahand University of Technology

A nanostructured NiAPSO-34 catalyst was hydrothermally synthesized and the effect of the template （diethylamine （DEA）, tetraethylammonium hydroxide （TEAOH） and DEA/TEAOH） on the physicochemical properties and catalytic performance in the methanol to olefin （MTO） reaction was investigated. The samples were characterized by X-ray diffraction, field emission scanning electron microscopy （FESEM）, particle size distribution analysis, energy-dispersive X-ray spectroscopy, Brunauer-Emmett-Teller anal- ysis and Fourier transform infrared spectroscopy. The X-ray diffraction patterns indicated a higher crystallinity and larger crystallite size for the catalyst synthesized using the DEA template. The FESEM results indicated that the nature of the template could affect the morphology of the nanostructured NiAPSO-34 catalyst because of its effect on the rate of crystal growth. The catalytic performance of the samples was studied in the MTO reaction at atmospheric pressure and a space velocity of 4200 cm^3 /（g h^-1 ） in a fixed bed reactor. The stability and activity of the NiAPSO-34 catalyst were improved using the DEA template because of its higher crystallinity, surface area and the greater extent of Ni incorporation into its framework. The possible stages of synthesis and the reaction mechanism for the MTO process over NiAPSO-34 are discussed in detail.

关键词： NiAPSO-34 DEA TEAOH Methanol Olefins MTO

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Catalytic process modeling and sensitivity analysis of alkylation of benzene with ethanol over MIL-101(Fe) and MIL-88(Fe)

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Frontiers of Chemical Science and Engineering 2020年第6期14卷 1100-1111页

作者： Ehsan Rahmani mohammad Rahmani Department of Chemical Engineering Amirkabir University of TechnologyTehran 158754413Iran

A solvothermal method was used to synthesize MIL-101(Fe)and MIL-88(Fe),which were used for alkylation of *** synthesized catalysts were characterized by X-ray diffraction,Fourier transform infrared spectroscopy,field emission scanning electron microscope,dynamic light scattering,and BET ***-organic frameworks(MOFs)were modeled to investigate the catalytic performance and existence of mass transfer *** effectiveness factors revealed absence of internal a nd external mass *** analysis revealed best operating conditions over MIL-101 at 120℃ and 5 bar and over MIL-88 at 142℃ and 9 bar.

关键词： MOFs alkylation ethylbenzene catalysts pellet model kinetic model sensitivity analysis

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CuCrW(Al2O3) nanocomposite: mechanical alloying, microstructure, and tribological properties

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International Journal of Minerals,Metallurgy and Materials 2017年第11期24卷 1321-1334页

作者： mohammad Baghani Mahmood Aliofkhazraei Department of Materials Science Faculty of Engineering Tarbiat Modares University Tehran Iran P.O. Box: 14115-143

The effect of alumina nanoparticle addition on the microstructure and tribological properties of a CuCrW alloy was investigated in this work. Mechanical alloying was carried out in a satellite ball mill. The tribological properties of the samples were evaluated using pin-on-disk wear tests with different pins(alumina, tungsten carbide, and steel pins). The results indicated that the tungsten carbide pin had a lower coefficient of friction than the alumina and steel pins because of its high hardness and low surface roughness. In addition, when the sliding rate was decreased, the weight-loss rate increased. The existence of alumina nanoparticles in the nanocomposite led to a lower weight-loss rate and to a change in the wear mechanism from adhesive to abrasive.

关键词： wear mechanicalalloying nanocomposite tribologicalproperties metalmatrix

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Reliability Assessment of Integrated Electricity and Natural Gas Transmission Systems in Presence of Power-to-gas and Combined Heat and Power Technologies

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CSEE Journal of Power and Energy Systems 2023年第3期9卷 1193-1202页

作者： Alireza Tabebordbar mohammad Rastegar School of Electrical and Computer Engineering Shiraz UniversityShiraz 71946-84636Iran(the Islamic Republic of)

Assessing the reliability of integrated electricity and gas systems has become an important issue due to the strong dependence of these energy networks through the power-to-gas(P2G)and combined heat and power(CHP)*** current work,initially,presents a detailed energy flow model for the integrated power and natural gas system in light of the P2G and CHP *** the simultaneous load flow of networks,a contingency analysis procedure is proposed,and reliability is assessed through sequential Monte Carlo *** current study examines the effect of independent and dependent operation of energy networks on the reliability of the *** particular,the effect of employing both P2G and CHP technologies on reliability criteria is *** addition,a series of sensitivity analysis are performed on the size and site of these technologies to investigate their effects on system *** proposed method is implemented on an integrated IEEE 24-bus electrical power system and 20-node Belgian natural gas *** simulation procedure certifies the proposed method for reliability assessment is practical and *** addition,the results prove connection between energy networks through P2G and CHP technologies can improve reliability of networks if the site and size of technologies are properly determined.

关键词： CHP technology P2G technology integrated electrical power and natural gas network reliability assessment sequential Monte Carlo simulation method

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