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| 1 | Geochronology and petrogenesis of the mafic dykes from the Purang ophiolite:Implications for evolution of the western Yarlung-Tsangpo suture zone,southwestern Tibet显示文摘The>2000 km Indus-Yarlung Tsangpo suture zone(IYSZ)is composed of the Neo-tethys oceanic remnants,flysch units and related continental rocks,which has been regarded as the boundary between the Eurasian and Indian terranes.Among the ophiolitic complexes,the Purang ophiolite is the biggest massif in the IYSZ,and many studies have been conducted on this ophiolite.However,previous studies have mainly focused on harzburgite,clinopyroxenite and dunite.Field observations show that mafic dykes were emplaced within the Purang ophiolite.However,petrogenetic evolutions of those mafic dykes are poorly understood.In this study,we present new LA-ICP-MS zircon U-Pb dating results,whole-rock geochemistry and Sr-Nd-Hf isotope analyses for microgabbro,gabbro and dolerite dykes from the Purang ophiolite of the southwestern IYSZ,respectively.Three samples yielded zircon U-Pb ages of144.2±2.1 Ma.127.9±2.3 Ma and 126.5±0.42 Ma,suggesting two different phases of magmatic activities distinctly.Whole-rock geochemical results suggest that the gabbro samples show alkaline features marked by enrichments of light rare earth elements(LREE)and large-ion lithophile elements(LILE),as well as Nb-Ta elements,suggesting an oceanic island basalt-like(OIB-like)geochemical affinity.However,the dolerite and microgabbro samples demonstrate sub-alkaline characteristics with normal mid-oceanic ridge basalt-like(N-MORB-like)geochemical features.Three distinct mafic dykes show significant Rb element depletion.The geochemical data and Sr-Nd-Hf isotopic features suggest that the microgabbro and gabbro rocks were derived from a depleted mantle that had been metasomatized by partial melts of sediments and enriched slab-derived fluids.The dolerite was also originated from a depleted mantle marked by significantly depleted Sr-Nd-Hf compositions,which was not influenced by enriched slab-derived fluids and sediments contamination during subsequent evolution.The isotope and geochemical data and tectonic diagrams suggest a tectonic transition from a within-plate to a midoceanic ridge basalt-like(MORB-like)setting during the period from ca.144 Ma to 127 Ma.Combined with regional background and this study,we propose that these mafic dykes were formed in an oceanic back-arc basin setting.Additionally,integrated with previous studies,we suggest that the geodynamic evolution of the southwestern and central parts of the Neo-Tethys oceanic basin is comparable in Early Cretaceous. | Fahui Xiong Yuanku Meng Jingsui Yang Zhao Liu Xiangzhen Xu Alireza Eslami Ran Zhang | 2020 | Geoscience Frontiers2020，11，1： | 10 |
| 2 | Power system stabilizer design using hybrid multi-objective particle swarm optimization with chaos显示文摘A novel technique for the optimal tuning of power system stabilizer (PSS) was proposed,by integrating the modified particle swarm optimization (MPSO) with the chaos (MPSOC).Firstly,a modification in the particle swarm optimization (PSO) was made by introducing passive congregation (PC).It helps each swarm member in receiving a multitude of information from other members and thus decreases the possibility of a failed attempt at detection or a meaningless search.Secondly,the MPSO and chaos were hybridized (MPSOC) to improve the global searching capability and prevent the premature convergence due to local minima.The robustness of the proposed PSS tuning technique was verified on a multi-machine power system under different operating conditions.The performance of the proposed MPSOC was compared to the MPSO,PSO and GA through eigenvalue analysis,nonlinear time-domain simulation and statistical tests.Eigenvalue analysis shows acceptable damping of the low-frequency modes and time domain simulations also show that the oscillations of synchronous machines can be rapidly damped for power systems with the proposed PSSs.The results show that the presented algorithm has a faster convergence rate with higher degree of accuracy than the GA,PSO and MPSO. | Mahdiyeh Eslami Hussain Shareef Azah Mohamed | 2011 | Journal of Central South University2011，18，5： | 9 |
| 3 | T2* magnetic resonance imaging of the liver in thalassemic patients in Iran显示文摘AIM: To investigate the accuracy of T2*-weighted magnetic resonance imaging (MRI T2*) in the evaluation of iron overload in beta-thalassemia major patients. METHODS: In this cross-sectional study, 210 patients with beta-thalassemia major having regular blood transfusions were consecutively enrolled. Serum ferritin levels were measured, and all patients underwent MRI T2* of the liver. Liver biopsy was performed in 53 patients at an interval of no longer than 3 mo after the MRIT2* in each patient. The amount of iron was assessed in both MRI T2* and liver biopsy specimens of each patient. RESULTS: Patients’ ages ranged from 8 to 54 years with a mean of 24.59 ± 8.5 years. Mean serum ferritin level was 1906 ± 1644 ng/mL. Liver biopsy showed a moderate negative correlation with liver MRI T2* (r = -0.573, P = 0.000) and a low positive correlation with ferritin level (r = 0.350, P = 0.001). Serum ferritin levels showed a moderate negative correlation with liver MRI T2* values (r = -0.586, P = 0.000). CONCLUSION: Our study suggests that MRI T2* is a non-invasive, safe and reliable method for detecting iron load in patients with iron overload. | Farhad Zamani Sara Razmjou Shahram Akhlaghpoor Seyyedeh-Masoomeh Eslami Azita Azarkeivan Afsaneh Amiri | 2011 | World Journal of Gastroenterology2011，17，4： | 8 |
| 4 | Comparison of Artificial Neural Networks,Geographically Weighted Regression and Cokriging Methods for Predicting the Spatial Distribution of Soil Macronutrients(N,P,and K)显示文摘Soil macronutrients(i.e. nitrogen(N), phosphorus(P), and potassium(K)) are important soils components and knowing the spatial distribution of these parameters are necessary at precision agriculture. The purpose of this study was to evaluate the feasibility of different methods such as artificial neural networks(ANN) and two geostatistical methods(geographically weighted regression(GWR) and cokriging(CK)) to estimate N, P and K contents. For this purpose, soil samples were taken from topsoil(0–30 cm) at 106 points and analyzed for their chemical and physical parameters. These data were divided into calibration(n = 84) and validation(n = 22). Chemical and physical variables including clay, p H and organic carbon(OC) were used as auxiliary soil variables to estimate the N, P and K contents. Results showed that the ANN model(with coefficient of determination R^2 = 0.922 and root mean square error RMSE = 0.0079%) was more accurate compared to the CK model(with R^2 = 0.612 and RMSE = 0.0094%), and the GWR model(with R^2 = 0.872 and RMSE = 0.0089%) to estimate the N variable. The ANN model estimated the P with the RMSE of 3.630 ppm, which was respectively 28.93% and 20.00% less than the RMSE of 4.680 ppm and 4.357 ppm from the CK and GWR models. The estimated K by CK, GWR and ANN models have the RMSE of 76.794 ppm, 75.790 ppm and 52.484 ppm. Results indicated that the performance of the CK model for estimation of macro nutrients(N, P and K) was slightly lower than the GWR model. Also, the accuracy of the ANN model was higher than CK and GWR models, which proved to be more effective and reliable methods for estimating macro nutrients. | Samad EMAMGHOLIZADEH Shahin SHAHSAVANI Mohamad Amin ESLAMI | 2017 | Chinese Geographical Science2017，27，5： | 5 |
| 5 | Opposition-Based Firefly Algorithm for Earth Slope Stability Evaluation显示文摘This paper introduces a new approach of firefly algorithm based on opposition-based learning(OBFA) to enhance the global search ability of the original algorithm. The new algorithm employs opposition based learning concept to generate initial population and also updating agents' positions. The proposed OBFA is applied for minimization of the factor of safety and search for critical failure surface in slope stability analysis. The numerical experiments demonstrate the effectiveness and robustness of the new algorithm. | Mohammad KHAJEHZADEH Mohd Raihan TAHA Mahdiyeh ESLAMI | 2014 | China Ocean Engineering2014，28，5： | 5 |
| 6 | Modified particle swarm optimization for optimum design of spread footing and retaining wall显示文摘This paper deals with the economically optimized design and sensitivity of two of the most widely used systems in geotechnical engineering: spread footing and retaining wall. Several recent advanced optimization methods have been developed, but very few of these methods have been applied to geotechnical problems. The current research develops a modified particle swarm optimization (MPSO) approach to obtain the optimum design of spread footing and retaining wall. The algorithm handles the problem-specific constraints using a penalty function approach. The optimization procedure controls all geotechnical and structural design constraints while reducing the overall cost of the structures. To verify the effectiveness and robustness of the proposed algorithm, three case studies of spread footing and retaining wall are illustrated. Comparison of the results of the present method, standard PSO, and other selected methods employed in previous studies shows the reliability and accuracy of the algorithm. Moreover, the parametric performance is investigated in order to examine the effect of relevant variables on the optimum design of the footing and the retaining structure utilizing the proposed method. | Mohammad KHAJEHZADEH Mohd Raihan TAHA Ahmed EL-SHAFIE Mahdiyeh ESLAMI | 2011 | Journal of Zhejiang University-Science A(Applied Physics & Engineering)2011，12，6： | 4 |
| 7 | A New Approach to Plane Failure of Rock Slope Stability Based on Water Flow Velocity in Discontinuities for the Latian Dam Reservoir Landslide显示文摘The stability of slopes is always of great concern in the field of rock engineering. The geometry and orientation of pre-existing discontinuities show a larger impact on the behavior of slopes that is often used to describe the measurement of the steepness, incline, gradient, or grade of a straight line. One of the structurally controlled modes of failure in jointed rock slopes is plane failure. There are numerous analytical methods for the rock slope stability including limit equilibrium, stress analysis and stereographic methods. The limiting equilibrium methods for slopes under various conditions against plane failure have been previously proposed by several investigators. However, these methods do not involve water pressure on sliding surfaces assessments due to water velocity and have not yet been validated by case study results. This paper has tried to explore the effects of forces due to water pressure on discontinuity surfaces in plane failure through applying the improved equations. It has studied the effect of water flow velocity on sliding surfaces in safety factor, as well. New equations for considering water velocity (fluid dynamics) are presented. To check the validity of the suggested equations, safety factor for a case study has been determined. Results show that velocity of water flow had significant effect on the amount of safety factor. Also, the suggested equations have higher validity rate compared to the current equations. | Morteza AHMADI Majid ESLAMI | 2011 | Journal of Mountain Science2011，8，2： | 3 |
| 8 | Effect of alumina content and heat treatment on microstructure and upconversion emission of Er^(3+)ions in oxyfluoride glass-ceramics显示文摘The effect of alumina content and heat treatment temperature and time, on microstructure and Er3+ (0.5 mol.%) emission of oxy-fluoride glass-ceramics were investigated in this research. Two values of 1.8 (SA1.8Er0.5) and 2.18 (SA2.18Er0.5) were selected in this re-search for SiO2/Al2O3 ratio. According to DTA results, precursor glasses were heat treated at 630, 660 and 690 °C for 4 h and some glasses were also heat treated at 630 °C for 48 and 72 h. The results indicated that alumina content had significant effect on phase separation and vis-cosity of the glasses. Therefore the size, size distribution, and volume concentration of nano CaF2 crystals which precipitated during the heat treatment depended on alumina content of the glass. Due to the much smaller size of the precipitated CaF2 crystals in the glasses of low alumina content, these samples maintained excellent transparency and had narrower crystal size distribution than the high alumina glasses. The crystal size was increased markedly with the temperature increasing from 630 to 690 °C. On the other hand a slight increase was observed in the crystal size by raising the heat treatment time in both glasses. Results indicated that in low alumina content glass (SA2.18Er0.5) the size of CaF2 nanocrystals was controlled in one order of magnitude. The increase of heat treatment time and temperature led to the incorporation of Er3+ ions into CaF2 crystalline phase, increasing significantly the upconversion intensity. After heat treatment at 690 ℃ for 4 h, atomic force microscope (AFM) re-vealed the development of small crystals with an average size of 80 and 30 nm in SA1.8Er0.5 and SA2.18Er0.5 samples, respectively. | Mohammad Hasan Imanieh Bijan Eftekhari Yekta Vahak Marghussian Inocencio Rafael Martin Benenzuela Alberto Hernandez Creus Saeed Shakhesi Esmaeil Eslami | 2012 | Journal of Rare Earths2012，30，12： | 3 |
| 9 | Two effective approaches for solving fractional generalized Hirota-Satsuma coupled KdV system arising in interaction of long waves显示文摘In this article,two different methods,namely sub-equation method and residual power series method,have been used to obtain new exact and approximate solutions of the generalized Hirota-Satsuma system of equations,which is a coupled KdV model.The fractional derivative is taken in the conformable sense.Each of the obtained exact solutions were checked by substituting them into the corresponding system with the help of Maple symbolic computation package.The results indicate that both methods are easy to implement,effective and reliable.They are therefore ready to apply for various partial fractional differential equations. | Ali Kurt Hadi Rezazadeh Mehmet Senol Ahmad Neirameh Orkun Tasbozan Mostafa Eslami Mohammad Mirzazadeh | 2019 | Journal of Ocean Engineering and Science2019，4，1： | 3 |
| 10 | A new hybrid algorithm for global optimization and slope stability evaluation显示文摘A new hybrid optimization algorithm was presented by integrating the gravitational search algorithm(GSA)with the sequential quadratic programming(SQP),namely GSA-SQP,for solving global optimization problems and minimization of factor of safety in slope stability analysis.The new algorithm combines the global exploration ability of the GSA to converge rapidly to a near optimum solution.In addition,it uses the accurate local exploitation ability of the SQP to accelerate the search process and find an accurate solution.A set of five well-known benchmark optimization problems was used to validate the performance of the GSA-SQP as a global optimization algorithm and facilitate comparison with the classical GSA.In addition,the effectiveness of the proposed method for slope stability analysis was investigated using three case studies of slope stability problems from the literature.The factor of safety of earth slopes was evaluated using the Morgenstern–Price method.The numerical experiments demonstrate that the hybrid algorithm converges faster to a significantly more accurate final solution for a variety of benchmark test functions and slope stability problems. | Taha Mohd Raihan Khajehzadeh Mohammad Eslami Mahdiyeh | 2013 | Journal of Central South University2013，20，11： | 3 |
| 11 | Investigation of sensitivity and threshold voltage shift of commercial MOSFETs in gamma irradiation显示文摘This article is about the absorbed-dose-dependent threshold voltage shift of the MOSFET transistors.Performance of the MOSFETs has been tested in different gate voltages.Sensitivity of the transistors for 662 ke V gamma ray is studied in 1–5 Gy dose range.It was found that for transistors irradiated in biased mode,significant changes in the threshold voltage occurred,and the sensitivity to gamma rays increased with the bias voltage. | Saleh Ashrafi Baharak Eslami | 2016 | Nuclear Science and Techniques2016，27，6： | 2 |
| 12 | Synthesis and spectral properties of Nd-doped glass-ceramics in SiO_2-CaO-MgO system prepared by sol-gel method显示文摘SiO2-CaO-MgO glass and glass-ceramic powder doped with Nd3+ were synthesized with sol-gel method.Tetraethylorthosilicate (TEOS),Ca(NO3)2·4H2O,Mg(NO3)2·6H2O,Nd(NO3)3·6H2O,ethanol,distilled water,and HNO3 were used as starting materials.The synthesized powder's properties were examined with simultaneous thermal analysis (STA),X-ray diffraction (XRD),photoluminescence (PL) and scanning electron microscopy (SEM) analysis.The STA curves showed that the softening point and crystallization temperatures were shifted to higher temperatures with increasing dopant content.Regarding XRD patterns of glass samples,Nd was found to act as an intermediate oxide in glass matrix.The XRD patterns of glass-ceramic samples indicated that bredigite and akermanite crystallized in the glass matrix after heat treating at 900 oC.The fluorescence spectra showed that glass-ceramics emitted much stronger irradiation than glasses with the same dopant content.The SEM images illustrated uniform and homogeneous distribution of applied oxides in glass and glass-ceramic compositions. | Masoud Eslami Zohreh Hamnabard Ali Nemati | 2013 | Journal of Rare Earths2013，31，6： | 2 |
| 13 | Expeditious solvent-free synthesis of 1,3-thiazolanes via multicomponent reactions显示文摘A series of 1 3-thiazolane derivatives have been synthesized via multicomponent reactions of activated acetylenes,primary amines and isothiocyanates in the presence of a catalytic amount of Nmethylimidazole under solvent-free conditions. | Zinatossadat Hossaini Faramarz Rostami-Charati Mahboube Eslami Moghadam Fatemeh Moghaddasi-Kochaksaraee | 2014 | Chinese Chemical Letters2014，25，5： | 2 |
| 14 | A systematic review on prognostic indicators of acute on chronic liver failure and their predictive value for mortality显示文摘 | Kama A. Wlodzimirow Saeid Eslami Ameen Abu‐Hanna Martin Nieuwoudt Robert A. F. M. Chamuleau | 2012 | Liver Int2012，，1： | 2 |
| 15 | Thermal and mechanical stresses in a functionally graded thick sphere显示文摘 | Eslami M R Babaei M H Poultangari R | 2005 | Int J Press Vess Piping2005，82，： | 1 |
| 16 | Thoraeoscopic approach for spine deformities显示文摘 | Krasna MJ Jiao X Eslami A | 2003 | J Am Coll Surg2003，197，5： | 1 |
| 17 | Estimating most productive scale size with imprecise-chance constrained input-output orientation model in data envelopment analysis显示文摘 | Eslami R Khodabakhshi M Jahanshahloo G R | 2012 | Computers and Industrial Engineering2012，63，1： | 1 |
| 18 | An exact solution for thermal buckling of annular FGM plates on an elastic medium 显示文摘 | Kiani Y Eslami M R | 2013 | Composites: Part B2013，45，1： | 1 |
| 19 | Secret image sharing based on cellular automata and steganography 显示文摘 | Eslami Z Razzaghi S H Zarepour A J | 2010 | Pattern Rec- ognition2010，43，1： | 1 |
| 20 | Recognition of commensal microflora by toll - like receptors is required for intestinal ho- meostasis 显示文摘 | Rakoff - Nahoum Justin Paglino S Fatima Eslami - Varzaneh | 2004 | Ceil2004，365，7： | 1 |
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