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The hydrodynamic performance of a turbine in shallow free surface flow

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Journal of Hydrodynamics 2021年第4期33卷 804-820页

作者： Zeda Yin Mehdi esmaeilpour Department of Mechanical Engineering College of Engineering and Computer SciencesMarshall UniversityHuntingtonWV25755USA

The performance and flow field of hydropower turbine in shallow water can be affected by the presence of free surface. Therefore, the influence of free surface on the turbine performance was studied through transient computational fluid dynamics (CFD) analysis. The turbine included three blades made of NACA0018 hydrofoil. Submerged depths and different tip speed ratio (TSR) were two main variables in this numerical simulation. A comprehensive simulation of quantities was performed for submerged depths ranging from h / R = 1.2 to 2.0, and tip speed ratio from λ = 1.0 to 30. The results revealed that the presence of the free surface decreased the power coefficient by 19.05% for the closest submerged depth of h / R = 1.2 at optimal tip speed ratio of λ = 2.5. The wave breaking also occurred when the submerged depth was smaller than h / R = 2.0. In the case of variable pitch, the top speeds for free-to-spin cases were investigated by 6DOF method. The top speed had a 4.24% drop by comparing the largest and the smallest submerged depths. Variable pitch also improved the power coefficient by 28.09% when the free surface was far from the hydropower turbine. However, the power coefficient improvement became significantly small when the hydropower turbine was placed close to the free surface.

关键词： Hydropower turbine free surface computational fluid dynamics(CFD) Froude number tip speed ratio(TSR)

Three-component synthesis and antibacterial evaluation of some novel 1,2-dihydroisoquinoline derivatives

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Chinese Chemical Letters 2014年第11期25卷 1441-1444页

作者： Sakineh Asghari Nastaran Malekian Roya esmaeilpour Mohammad Ahmadipour Mojtaba Mohseni Department of Organic Chemistry Faculty of Chemistry University of Mazandaran Nano and Biotechnology Research Group University of Mazandaran Department of Microbiology Faculty of Science University of Mazandaran

Isoquinoline reacts with dialkyl acetylenedicarboxylates in the presence of kojic acid or8-hydroxyquinoline to generate 1,2-dihydroisoquinoline derivatives. The simplicity, mild reaction conditions and high yields of products make it an interesting process compared to other approaches. The compounds have been analyzed for antibacterial activity against Gram negative and Gram positive bacteria. The results indicated that 1,2-dihydroisoquinolines derived from kojic acid are effective against all of the studied bacteria especially against Bacillus subtilis, while the products obtained from8-hydroxyquinoline are active only against Gram positive bacteria.

关键词： Kojic acid 8-Hydroxyquinolone Dialkyl acetylenedicarboxylates 1 2-Dihydroisoquinoline Isoquinoline Antibacterial activity

Solution of nonlinear cubic-quintic Duffing oscillators using He’s Energy Balance Method

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第9期10卷 1263-1268页

作者： D.D.GANJI M.GORJI S.SOLEIMANI M.esmaeilpour Department of Mechanical Engineering University of Mazandaran

In this study, He＇s Energy Balance Method （EBM） was applied to solve strong nonlinear Duffing oscillators with cubic-quintic nonlinear restoring force. The complete EBM solution procedure of the cubic-quintic Duffing oscillator equation is presented. For illustration of effectiveness and convenience of the EBM, different cases of cubic-quintic Duffing oscillator with different parameters of α,β and y were compared with the exact solution. We found that the solutions were valid for small as well as large amplitudes of oscillation. The results show that the EBM is very convenient and precise, so it can be widely appli- cable in engineering and other sciences.

关键词： Energy Balance Method (EBM) Cubic-quintic Duffing equation Oscillator

Economic modeling of mechanized and semi-mechanized rainfed wheat production systems using multiple linear regression model

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Information Processing in Agriculture 2020年第1期7卷 30-40页

作者： Mobin Amoozad-Khalili Reza Rostamian Mahdi esmaeilpour-Troujeni Armaghan Kosari-Moghaddam Department of Agricultural Economic Qaemshahr BranchIslamic Azad UniversityIran Department of Biosystems Engineering Ferdowsi University of MashhadMashhadIran Department of Biosystems Engineering University of TabrizTabrizIran

Mathematical modeling of economic indices is a challenging topic in crop production *** present study aimed to model the economic indices of mechanized and semimechanized rainfed wheat production systems using various multiple linear regression *** study area was Behshahr County located in the east of Mazandaran Province,Northern *** statistical population included all wheat producers in Behshahr County in 2016/17 crop *** input variables were human labor,machinery,diesel fuel,chemical(chemical fertilizers and chemical pesticides)costs,and the income was considered to be the *** results showed that the cost of wheat production in the semimechanized system was higher than that of the mechanized *** both systems,the highest cost was related to agricultural machinery ***,seed cost was lower in the mechanized system than that of the semi-mechanized *** net return indicator was 993.68$ha1 and 626.71$ha1 for the mechanized and semi-mechanized systems,*** average benefit to cost ratio was 3.46 and 2.40 for the mechanized and semi-mechanized systems,respectively,demonstrating the greater profitability of the mechanized *** results of the evaluation of five types of regression models including the Cobb-Douglas,linear,2FI,quadratic and pure-quadratic for the mechanized and semi-mechanized production systems indicated that in the developed Cobb-Douglas model,the R2-value was higher than that of the quadratic model while RMSE and MAPE of the quadratic model were determined to be smaller than that of the Cobb-Douglas ***,the best model to investigate the relationship between input costs and the income of wheat production in both mechanized and semi-mechanized systems was the quadratic model.

关键词： Rainfed wheat Economic modeling Multiple linear regression model Production costs

The potential effects of Caper (Capparis spinosa L.) in the treatment of diabetic neuropathy

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Traditional Medicine Research 2020年第6期5卷 442-448页

作者： Hamid Reza esmaeilpour Reza Boostani Ali Shoeibi Mojtaba Mousavi Bazzaz Roshanak salari Mahdi Yousefi Department of Persian Medicine School of Persian and Complementary MedicineMashhad University of Medical SciencesMashhadIran Department of Neurology and HTLV-1 Foundation Ghaem HospitalSchool of MedicineMashhad University of Medical SciencesMashhadIran Department of Neurology Ghaem HospitalSchool of MedicineMashhad University of Medical SciencesMashhadIran Department of Community Medicine School of MedicineMashhad University of Medical SciencesMashhadIran Department of Pharmaceutical Sciences in Persian Medicine School of Persian and Complementary MedicineMashhad University of Medical SciencesMashhadIran

Diabetic neuropathy(DN)is the most common form of neuropathy worldwide,with its prevalence rising alongside diabetes,and being characterized by sensory,motor or autonomic *** is considered to be an incurable complication of diabetes,the management of which mainly consists of improving glycemic control,managing pain relief and ensuring continuous foot *** gabapentin,duloxetine and tricyclic antidepressants are commonly used to reduce patient symptoms,they do not affect the pathophysiology and progression of ***,these drugs can have various side effects including insomnia,decreased appetite,arrhythmia,heart failure,and suicidal *** to traditional Persian medicine,DN is recognized as a type of“Khadar”or“Esterkha”(a sensory or motor disorder,respectively)that occurs due to the accumulation of sugars in the peripheral *** spinosa L.,commonly known as the caper plant,has been recommended in authentic sources of traditional Persian medicine to treat such *** this study,we reviewed the pharmacological properties of *** using the Web of Science,PubMed,Scopus and Google Scholar databases,and found that Capparis spinosa *** affect several pathways involved in DN pathogenesis,including aldose reductase activity,the secretion of inflammatory mediators(IL-17,TNF-α,IL-1β,IL-6),oxidative stress,hyperlipidemia,hyperglycemia and advanced glycation end product *** on these findings,we hypothesize that Capparis spinosa L.,may prevent the progression and reduce the symptoms of diabetic neuropathy,and so can be considered as a complementary treatment in this *** hypothesis should be evaluated in well-designed in vitro and in vivo studies,and through clinical trials.

关键词： Capparis spinosa L. Diabetic neuropathy Traditional Persian medicine “Khadar” “Esterkha”

Path-Based Clustering Algorithm with High Scalability Using the Combined Behavior of Evolutionary Algorithms

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Computer Systems Science & Engineering 2024年第3期48卷 705-721页

作者： Leila Safari-Monjeghtapeh Mansour esmaeilpour Department of Computer Engineering Sanandaj BranchIslamic Azad UniversitySanandaj65166Iran Department of Computer Engineering Hamedan BranchIslamic Azad UniversityHamedan69168Iran

Path-based clustering algorithms typically generate clusters by optimizing a benchmark *** optimiza-tion methods in clustering algorithms often offer solutions close to the general optimal *** study achieves the global optimum value for the criterion function in a shorter time using the minimax distance,Maximum Spanning Tree“MST”,and meta-heuristic algorithms,including Genetic Algorithm“GA”and Particle Swarm Optimization“PSO”.The Fast Path-based Clustering“FPC”algorithm proposed in this paper can find cluster centers correctly in most datasets and quickly perform clustering *** FPC does this operation using MST,the minimax distance,and a new hybrid meta-heuristic algorithm in a few rounds of algorithm *** algorithm can achieve the global optimal value,and the main clustering process of the algorithm has a computational complexity of O�k2×n�.However,due to the complexity of the minimum distance algorithm,the total computational complexity is O�n2�.Experimental results of FPC on synthetic datasets with arbitrary shapes demonstrate that the algorithm is resistant to noise and outliers and can correctly identify clusters of varying sizes and *** addition,the FPC requires the number of clusters as the only parameter to perform the clustering process.A comparative analysis of FPC and other clustering algorithms in this domain indicates that FPC exhibits superior speed,stability,and performance.

关键词： Clustering global optimization the minimax matrix MST path-based clustering FPC

Impact of Financial Development on the Environmental Quality in Iran

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Chinese Business Review 2014年第9期13卷 537-551页

作者： Hadi esmaeilpour Moghadam Mohammad Reza Lotfalipour Ferdowsi University of Mashhad Mashhad Iran

In recent decades, undesirable environmental changes, such as global warming and greenhouse gases emission, have raised worldwide concerns. In order to achieve higher growth rate, environmental problems emerged from economic activities have turned into a controversial issue. The aim of this study is to investigate the effect of financial development on environmental quality in Iran. For this purpose, the statistical data over the period from 1970 to 2011 were used. Also by using the Auto Regression Model Distributed Lag （ARDL）, short-term and long-term relationships among the variables of model were estimated and analyzed. The results show that financial development accelerates the degradation of the environment; however, the increase in trade openness reduces the damage to environment in Iran. Error correction coefficient shows that in each period, 53% of imbalances would be justified and will approach their long-run procedure. Structural stability tests show that the estimated coefficients were stable over the period.

关键词： financial development trade Auto Regression Model Distributed Lag (ARDL)

Experimental Study of Engineered Cement Plug to Effectively Cure Losses While Drilling in Iranian Oil/Gas Well

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International Journal of Geosciences 2016年第2期7卷 115-119页

作者： Majid Sajjadian Ehsan esmaeilpour Motlagh Ali Akbar Daya Department of Mining Engineering University of Sistan and Baluchestan Zahedan Iran

Mud losses are one of the most severe problems encountered in drilling. This is commonly known as lost circulation. It can occur in naturally fractured formations and also can be induced in formations through drilling. Mud losses while drilling leading to cost overruns and HSE concerns, primary cement job failure due to not getting the cement up to the desired height resulting in subsequent sustained casing pressure and corrosion, not able to perform work over activity on certain wells due to losses. The objective of this paper is to explain extreme lost circulation problem and introduce cement plug formulation to cure or mitigate this problem. In addition, the cement plug has certain compressive strength that this is proper for use to control lost circulation in field. And finally, the application of a cement plug is described in one well of the Gas Field (National Iranian Oil Company).

关键词： Drilling Lost Circulation Cement Plug Compressive Strength

Epidemiological evidence of mosquito-borne viruses among persons and vectors in Iran:A study from North to South

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Virologica Sinica 2022年第1期37卷 149-152页

作者： Abbas Ahmadi Vasmehjani Farhad Rezaei Mohammad Farahmand Talat Mokhtari-Azad Mohammad Reza Yaghoobi-Ershadi Mohsen Keshavarz Hamid Reza Baseri Morteza Zaim Mahmood Iranpour Habibollah Turki Mohammad esmaeilpour-Bandboni Department of Virology School of Public HealthTehran University of Medical SciencesTehran14156446Iran Department of Medical Entomology and Vector Control School of Public HealthTehran University of Medical SciencesTehran14156446Iran The Persian Gulf Tropical Medicine Research Center The Persian Gulf Biomedical Sciences Research InstituteBushehr University of Medical SciencesBushehr***Iran Department of Entomology University of ManitobaR3T 2N2Canada Infectious and Tropical Diseases Research Center Hormozgan Health InstituteHormozgan University of Medical SciencesBandar Abbas***Iran School of Nursing Midwifery and ParamedicineGuilan University of Medical SciencesRasht***Iran

Dear Editor,Arthropod-borne viruses are a group of the most important emerging *** cause a range of diseases in vertebrate hosts and threaten human health(Gan and Leo,2014).The global distribution of arboviruses is as... 详细信息

关键词： conditions. diseases viruses