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Relationship between fatigue life of asphalt concrete and polypropylene/polyester fibers using artificial neural network and genetic algorithm

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Journal of Central South University 2015年第5期22卷 1937-1946页

作者： Morteza Vadood Majid Safar Johari ali reza Rahai Textile Engineering Department Amirkabir University of Technology Civil and Environmental Engineering Department Amirkabir University of Technology

While various kinds of fibers are used to improve the hot mix asphalt(HMA) performance, a few works have been undertaken on the hybrid fiber-reinforced HMA. Therefore, the fatigue life of modified HMA samples using polypropylene and polyester fibers was evaluated and two models namely regression and artificial neural network(ANN) were used to predict the fatigue life based on the fibers parameters. As ANN contains many parameters such as the number of hidden layers which directly influence the prediction accuracy, genetic algorithm(GA) was used to solve optimization problem for ANN. Moreover, the trial and error method was used to optimize the GA parameters such as the population size. The comparison of the results obtained from regression and optimized ANN with GA shows that the two-hidden-layer ANN with two and five neurons in the first and second hidden layers, respectively, can predict the fatigue life of fiber-reinforced HMA with high accuracy(correlation coefficient of 0.96).

关键词： hot mix asphalt fatigue property reinforced fiber artificial neural network genetic algorithm

Effects of preparation and operation conditions on precipitated iron nickel catalysts for Fischer-Tropsch synthesis

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Journal of Natural Gas Chemistry 2010年第3期19卷 341-353页

作者： Mostafa Feyzi ali Akbar Mirzaei Hamid reza Bozorgzadeh Department of Chemistry Faculty of SciencesUniversity of Sistan & Baluchestan Research Institute of Petroleum Industry(RIPI) Gas Division

Iron nickel oxide catalysts were prepared using co-precipitation procedure and studied for the conversion of synthesis gas to light *** particular,the effects of a range of preparation variables such as Fe/Ni molar ratios of the precipitation solution,precipitate aging times,calcination conditions,different supports and loading of optimum support on the structure of catalysts and their catalytic performance for the tested reaction were *** was found that the catalyst containing 40%Fe/60%Ni/40wt%Al 2O3 ,which was aged for 180 min and calcined at 600 ℃ for 6 h was the optimum modified *** catalytic performance of optimal catalyst has been studied in different operation conditions such as reaction temperatures,H2 /CO molar feed ratios and reaction total *** of both precursors and calcined catalysts was carried out by powder X-ray diffraction（XRD）,scanning electron microscopy（SEM）,Brunauer-Emmett-Teller（BET） surface area measurements,thermal analysis methods such as thermal gravimetric analysis（TGA） and differential scanning calorimetry（DSC）.

关键词： iron nickel light olefins Fischer-Tropsch operation conditions

Effective Controlled Islanding Method for Power Grids Solving a Sequence of Optimization Problems

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CSEE Journal of Power and Energy Systems 2022年第4期8卷 1004-1012页

作者： Mahdi Amini Haidar Samet ali reza Seifi Mahdi Davarpanah School of Electrical and Computer Engineering Shiraz UniversityShirazIran Department of Electrical Engineering Eindhoven University of TechnologyEindhoventhe Netherlands the Electrical and Computer Engineering School College of EngineeringUniversity of TehranTehranIran

Controlled islanding is an important approach to prevent instability in power *** this paper,a novel approach is proposed for power system separation,which consists of two steps:1)Finding multiple islanding scenarios;2)Choosing the best option to obtain the most desirable *** the first step,different islanding solutions are determined by a proposed hierarchical clustering *** this algorithm,which is based on a minimum active power flow disruption objective function,the generator coherency constraints are considered in the clustering *** the second step,the best separation scenario is chosen based on an arbitrary objective ***,in this paper,the amount of load shedding and the voltage profile deviation after separation are considered as the final criteria to select the best solution among available *** so doing,the degree of load importance is also taken into *** proposed two-step method is applied on an IEEE 9-bus test system and it is also evaluated on an IEEE 39-bus *** simulation results on the IEEE 39-bus grid and the comparative analysis with a state-of-the-art method confirm that the final islanding solution is more optimized based on the secondary criteria,which have not been addressed in the existing ***,the proposed method is computationally efficient and can be employed in real-scale power grids.

关键词： Graph theory hierarchical spectral clustering power system separation power system instability two-step approach.

Statistical approach to determination of overhaul and maintenance cost of loading equipment in surface mining

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International Journal of Mining Science and Technology 2013年第3期23卷 441-446页

作者： Lashgari ali Sayadi Ahmad reza Department of Mining Engineering West Virginia University Department of Mining Faculty of Engineering Tarbiat Modares University

The purpose of this research was to develop a new approach in determination of overhaul and maintenance cost of loading equipment in surface mining. Two statistical models including univariate exponential regression (UER) and multivariate linear regression (MLR) were used in this study. Loading equipment parameters such as bucket capacity, machine weight, engine power, boom length, digging depth, and dumping height were considered as variables. The results obtained by models and mean absolute error rate indicate that these models can be applied as the useful tool in determination of overhaul and maintenance cost of loading equipment. The results of this study can be used by the decision-makers for the specific surface mining operations.

关键词： Overhaul and maintenance cost Loading equipment Surface mining Univariate exponential regression Multivariate linear regression Principal component analysis

Solvent-free preparation of arylaminotetrazole derivatives using aluminum(Ⅲ) hydrogensulfate as an effective catalyst

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Chinese Chemical Letters 2010年第8期21卷 892-896页

作者： Ferydoon Khamooshi ali reza Modarresi-Alam Deparment of Chemistry Faculty of ScienceUniversity of Sistan and Baluchestan

An efficient and simple method for the preparation of 5-arylamino-1H-tetrazole and 1-aryl-5-amino-1H-tetrazole derivatives is reported using aluminum（Ⅲ） hydrogensulfate（Al（HSO4）3） as an effective heterogeneous catalyst from secondary arylcyanamides. Generally,when the substitution in arylcyanamide is strongly electron-withdrawing the position of equilibrium would shift toward the isomer of 1-aryl-5-amino-1H-tetrazole（B） and as the electron-donating of substituent increased,the position of equilibrium is shifted toward the isomer of 5-arylamino-1H-tetrazole（A）.The present methodology offers several advantages,such as excellent yields,short reaction times,easy work-up and greener conditions.

关键词： 5-Arylamino-1H-tetrazole 1-Aryl-5-amino-1H-tetrazole Secondary arylcyanamide Aluminum(Ⅲ) hydrogensulfate(Al(HSO_4)_3) Heterogeneous catalyst Solvent-free Solid acid

Application of 2,2'-dithiobis(4-methylthiazole) as sensing material for construction of Lu^(3+) PVC-membrane sensor

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Chinese Chemical Letters 2011年第8期22卷 977-980页

作者： Mohammad reza Abedi Hassan ali Zamani Department of Applied Chemistry Quchan BranchIslamic Azad UniversityQnchanIran

In this work a new Lu^（3＋） PVC-membrane sensor based on 2,2＇-dithiobis（4-methylthiazole）（TMT） has been *** sensor exhibits a Nernstian slope of 19.6±0.4 mV decade（？） in the concentration range of 1.0×10~6-1.0×10~2 mol L^1 and a detection limit of 6.8×10~7 mol L^*** could work well in the pH range of *** selectivity of the sensor against a lot of common alkaline,alkaline earth,transition,heavy metals and specially lanthanide ions was very good.

关键词： Ion-selective electrode Potentiometry Sensor PVC membrane

Role of interlayer composition in microstructure and mechanical properties during TLP bonding of GTD-111/IN-718 superalloys

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Transactions of Nonferrous Metals Society of China 2022年第3期32卷 908-926页

作者： ali IZADI GHAHFEROKHI Masoud KASIRI-ASGARANI Kamran AMINI Mahdi RAFIEI reza ebrahimi-KAHRIZSANGI Advanced Materials Research Center Department of Materials EngineeringNajafabad BranchIslamic Azad UniversityNajafabadIran Center for Advanced Engineering Research Majlesi BranchIslamic Azad UniversityIsfahanIran

An investigation was carried out to assess the applicability of transient liquid phase bonding of two dissimilar super-alloys with different interlayers. The effect of using three types of interlayer such as BNi-2, BNi-3, and BNi-9 on microstructure and mechanical properties was studied in the GTD-111/IN-718 system at 1100 ℃ for different bonding time. To determine the compositional changes and microstructure in the joint region, field emission scanning electron microscopy equipped with energy dispersive spectroscopy was utilized. The formation of Ni_(3)B in the athermally solidified zone(ASZ) is controlled by the B content and, accordingly, the morphology of Ni_(3)Si is governed by the Si content. The Cr content might impede the relocation of B from the interlayer into the base metal and the formation of CrB inside the ASZ is dominated by the Cr content. The high micro-hardness of the eutectic compounds is originated from the formation of boride matrixes such as Ni or Cr boride. The shear strength of the joint using BNi-9 after the completion of isothermal solidification is lower compared that that using BNi-3 and BNi-2, which could be related to the absence of Si in the filler metals constituent and the significant presence of Cr in BNi-9.

关键词： transient liquid phase bonding Ni-based superalloy isothermal solidification Ni-B compounds

Structural and Electronic Properties of Cyclic Peptide-gold Nanoparticle as a Drug Delivery System

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Chinese Journal of Structural Chemistry 2019年第4期38卷 566-580页

作者： KHOSHBAYAN Bahareh MORSali ali BOZORGMEHR Mohammad reza Department of Chemistry Mashhad Branch Islamic Azad University MashhadIran & Research Center for Animal Development Applied BiologyBranch Islamic Azad University

Using Au6 cluster and cyclooctaglycine model for gold nanoparticle(AuNP) and cyclic peptide(CP), twelve configurations for the functionalization of cyclic peptide-gold nanoparticle(CPAuNP) with gemcitabine(GEM) anticancer drug were investigated(CPAuNP/GEM1-12). Structural and electronic properties have been studied in gas phase and aqueous solution at M06-2 X/6-31 g(d,p). The energetic stability of CPAuNP/GEM1-12 was confirmed by the calculation of binding energies. Since the solubility of drug, CP and AuNP increases in CPAuNP/GEM1-12, cyclic peptide-gold nanoparticle could be used as an appropriate drug delivery system. Quantum molecular descriptors such as electrophilicity power and global hardness demonstrated that the reactivity of CP and GEM drug increases in CPAuNP/GEM1-12 configurations. The AIM analysis for CPAuNP/GEM1-12 indicated that the Au-L(L = H, O, F, C, N) interactions and intermolecular hydrogen bonds play important roles in this drug delivery system. All Au-Au and some of Au-L interactions are related to medium interactions. The most stable configurations are those in which GEM drug is parallel to the CPAuNP and interacts simultaneously with AuNP and CP.

关键词： gold nanoparticle gemcitabine cyclic peptide AIM analysis nanocarrier

Integration of Core Data, Well Logs and Seismic Attributes for Identification of the Low Reservoir Quality Units with Unswept Gas in the Carbonate Rocks of the World's Largest Gas Field

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Journal of Earth Science 2017年第5期28卷 857-866页

作者： Mohammad ali Faraji ali Kadkhodaie reza rezaee David A.Wood Department of Geology College of Science University of Tehran Earth Science Department Faculty of Natural Science University of Tabriz Department of Petroleum Engineering Curtin University DWA Energy Limited

Tight zones of the gas bearing Kangan and Dalan formations of the South Pars gas field contain a considerable amount of unswept gas due to their low porosity, low permeability and isolated pore types. The current study, integrates core data, rock elastic properties and 3D seismic attributes to delineate fight and low-reservoir-quality zones of the South Pars gas field. In the first step, the dynamic reservoir geomechanical parameters were calculated based on empirical relationships from well log data. The log-derived elastic moduli were validated with the available laboratory measurements of core data. Cross plots between estimated porosity and elastic parameters based on Young＇s modulus indicate that low porosity zone coincide with high values of Young＇s module. The results were validated with petro- graphic studies of the available thin sections. The core samples with low porosity and permeability are correlated with strong rocks with tight matrix frameworks and high elastic values. Subsequently, rock elastic properties including Young＇s modulus and Poisson＇s ratio along with porosity were estimated by using neural networks from a collection of 3D post-stack seismic attributes, such as acoustic impedance （ALl）, instantaneous phase of AI and apparent polarity. Distinguishing low reservoir quality areas in pay zones with unswept gas is then facilitated by locating low porosity and high elastic modulus values. An- hydrite zones are identified and eliminated as non-pay zones due to their characterization of zero porosi- ty and high Young modulus values. The methodology described has applications for unconventional re- servoirs more generally, because it is able to distinguish low porosity and permeability zones that are po- tentially productive from those unprospective zones with negligible reservoir quality.

关键词： tight zones unswept gas elastic parameters reservoir quality seismic attributes South Pars gas field.