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Water Science and Engineering 2016年第4期9卷 329-335页

作者： akram abbaspour Sahar Parvini Ali Hosseinzadeh Dalir Department of Water Engineering University of Tabriz

Local scour downstream of sluice gates in erosive beds is one of the main concerns of hydraulic engineers because it can cause considerable damage to *** researchers have conducted various studies to predict the maximum depth and length of scour holes and to develop new methods to control this *** the methods that have recently been examined,embedded buried plates are used to control the scour in the erosive *** this study,using a physical model,the effect of buried plates in erosive beds on the depth of scour downstream of a hydraulic jump was *** experiments were performed in which plates were buried at 50° and 90° angles at different distances from the apron in open channels with horizontal and reverse bed *** results of experiments in which the scour profiles were drawn in dimensionless forms show that the angle and position of the plates are important to controlling and reducing scour *** fact,by reducing the angle of buried plates,the maximum depth of scour is also ***,comparison of the results of a single buried plate and double buried plates shows that using two buried plates at the distances of 30 and 45 cm from the non-erodible bed is more effective in reducing the scour *** best distances of the buried plates with angles of 90° and 50° from the non-erodible bed are 45 cm and 30 cm,respectively,in the condition with a single buried plate.

关键词： Local scour Buried plates Hydraulic jump Horizontal and reverse bed slopes

Estimation of hydraulic jump on corrugated bed using artificial neural networks and genetic programming

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Water Science and Engineering 2013年第2期6卷 189-198页

作者： akram abbaspour Davood FARSADIZADEH Mohammad Ali GHORBANI Department of Water Engineering University of Tabriz

Artificial neural networks （ANNs） and genetic programming （GP） have recently been used for the estimation of hydraulic data. In this study, they were used as alternative tools to estimate the characteristics of hydraulic jumps, such as the free surface location and energy dissipation. The dimensionless hydraulic parameters, including jump depth, jump length, and energy dissipation, were determined as functions of the Froude number and the height and length of corrugations. The estimations of the ANN and GP models were found to be in good agreement with the measured data. The results of the ANN model were compared with those of the GP model, showing that the proposed ANN models are much more accurate than the GP models.

关键词： artificial neural networks genetic programming," corrugated bed, Froude number, hydraulic jump

Comparative study of multilayer perceptron-stochastic gradient descent and gradient boosted trees for predicting daily suspended sediment load: The case study of the Mississippi River, U.S.

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International Journal of Sediment Research 2021年第4期36卷 512-523页

作者： Sadra Shadkani akram abbaspour Saeed Samadianfard Sajjad Hashemi Amirhosein Mosavi Shahab S.Band Department of Water Engineering Faculty of Agriculture University of Tabriz Environmental Quality Atmospheric Science and Climate Change Research Group Ton Duc Thang University Faculty of Environment and Labour Safety Ton Duc Thang University Institute of Research and Development Duy Tan University Future Technology Research Center College of Future National Yunlin University of Science and Technology

Monitoring sediment transport is essential for managing and maintaining *** of the sediment load in rivers is fundamental for the study of sediment movement,erosion,and flood *** the current study,three machine learning models-multi-layer perceptron(MLP),multi-layer perceptron-stochastic gradient descent(MLP-SGD),and gradient boosted tree(GBT)-were utilized to estimate the suspended sediment load(SSL) at the ***(SL) and Chester(CH) stations on the Mississippi River,*** evaluation criteria including the Correlation Coefficient(CC),Nash Sutcliffe Efficiency(NSE),Scatter Index(SI),and Willmott’s Index(WI) were utilized to evaluate the performance of the used models.A sensitivity analysis of the models to the input variables revealed that the current day discharge variable had the most effect on the SSL at both stations,but in the absence of current-day discharge data(Qt),a combination of input parameters including SSLt-3,SSLt-2,SSLt-1,Qt-3,Qt-2,Qt-1can be used to estimate the *** comparative outcomes indicated the high accuracy of MLP-SGD-5 model with a CC of 0.983,SI of 0.254,WI of 0.991,and NSE of 0.967 at station CH and the MLP-SGD-6 model with a CC of 0.933,SI of 0.576,WI of 0.961,and NSE of 0.867,respectively,at station *** results of MLP models were improved by SGD ***,the MLP-SGD method is recommended as the most accurate model for SSL estimation.

关键词： Suspended sediment transport Ensemble learning Multilayer perceptron Stochastic gradient descent Machine learning

Effective point kinetic parameters calculation in Tehran research reactor using deterministic and probabilistic methods

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Nuclear Science and Techniques 2017年第12期28卷 182-192页

作者： M.Kheradmand Saadi A.abbaspour Department of Nuclear Engineering Science and Research Branch Islamic Azad University Department of Electrical Engineering Sharif University of Technology

The exact calculation of point kinetic parameters is very important in nuclear reactor safety assessment, and most sophisticated safety codes such as RELAP5, PARCS,DYN3D, and PARET are using these parameters in their dynamic models. These parameters include effective delayed neutron fractions as well as mean generation *** parameters are adjoint-weighted, and adjoint flux is employed as a weighting function in their *** flux calculation is an easy task for most of deterministic codes, but its evaluation is cumbersome for Monte Carlo codes. However, in recent years, some sophisticated techniques have been proposed for Monte Carlo-based point kinetic parameters calculation without any need of adjoint flux. The most straightforward scheme is known as the ‘‘prompt method'' and has been used widely in literature. The main objective of this article is dedicated to point kinetic parameters calculation in Tehran research reactor(TRR) using deterministic as well as probabilistic techniques. WIMS-D5B and CITATION codes have been used in deterministic calculation of forward and adjoint fluxes in the TRR core. On the other hand, the MCNP Monte Carlo code has been employed in the ‘‘prompt method''scheme for effective delayed neutron fraction *** results have been cross-checked with probabilistic ones and validated with SAR and experimental data. In comparison with experimental results, the relativedifferences of deterministic as well as probabilistic methods are 7.6 and 3.2%, respectively. These quantities are10.7 and 6.4%, respectively, in comparison with SAR report.

关键词： Point kinetic parameters Tehran research reactor Adjoint flux Prompt method Deterministic method Probabilistic method

Targeting immune checkpoints:how to use natural killer cells for fighting against solid tumors

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Cancer Communications 2023年第2期43卷 177-213页

作者： Farhoodeh Ghaedrahmati Nafiseh Esmaeil Maryam abbaspour Department of Immunology School of MedicineIsfahan University of Medical SciencesIsfahanIran Research Institute for Primordial Prevention of Non-Communicable Disease Isfahan University of Medical SciencesIsfahanIran Department of Pharmaceutical Biotechnology Faculty of PharmacyIsfahan University of Medical SciencesIsfahanIran

Natural killer(NK)cells are unique innate immune cells that mediate antiviral and anti-tumor ***,they might hold great potential for cancer *** cell adoptive immunotherapy in humans has shown modest *** particular,it has failed to demonstrate therapeutic efficiency in the treatment of solid tumors,possibly due in part to the immunosuppressive tumor microenvironment(TME),which reduces NK cell immunotherapy’s *** is known that immune checkpoints play a prominent role in creating an immunosuppressive TME,leading to NK cell exhaustion and tumor immune ***,NK cells must be reversed from their dysfunctional status and increased in their effector roles in order to improve the efficiency of cancer *** of immune checkpoints can not only rescue NK cells from exhaustion but also augment their robust anti-tumor *** this review,we discussed immune checkpoint blockade strategies with a focus on chimeric antigen receptor(CAR)-NK cells to redirect NK cells to cancer cells in the treatment of solid tumors.

关键词： natural killer cell immune checkpoint chimeric antigen receptor-natural killer cell immunotherapy tumor

Optimized design of drilling and blasting operations in open pit mines under technical and economic uncertainties by system dynamic modelling

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International Journal of Mining Science and Technology 2018年第6期28卷 839-848页

作者： H.abbaspour C.Drebenstedt M.Badroddin A.Maghaminik Institute for Mining and Special Civil Engineering Freiberg University of Mining and Technology Civil Engineering Department School of Computing and EngineeringUniversity of Missouri-Kansas City Institute of International Management of Resources and Environment Freiberg University of Mining and Technology

Drilling and blasting are the two most significant operations in open pit mines that play a crucial role in downstream stages. While previous research has focused on optimizing these operations as two separate parts or merely in a specific parameter, this paper proposes a system dynamic model(SDM) for drilling and blasting operations as an interactive system. In addition, some technical and economic uncertainties such as rock density, uniaxial compressive strength, bit life and operating costs are considered in this system to evaluate the different optimization results. For this purpose, Vensim simulation software is utilized as a powerful dynamic tool for both modelling and optimizing under deterministic and uncertain conditions. It is concluded that an integrated optimization as opposed to the deterministic approach can be efficiently achieved. This however is dependent on the parameters that are considered as uncertainties.

关键词： Drilling and blasting Uncertainties System dynamic modelling Optimization Vensim

A new approach for visual identification of orange varieties using neural networks and metaheuristic algorithms

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Information Processing in Agriculture 2018年第1期5卷 162-172页

作者： Sajad Sabzi Yousef abbaspour-Gilandeh Ginés García-Mateos Department of Biosystems Engineering College of AgricultureUniversity of Mohaghegh ArdabiliArdabilIran Computer Science and Systems Department University of Murcia30100 EspinardoMurciaSpain

Accurate classification of fruit varieties in processing factories and during post-harvesting applications is a challenge that has been widely *** paper presents a novel approach to automatic fruit identification applied to three common varieties of oranges(Citrus sinensis L.),namely Bam,Payvandi and Thomson.A total of 300 color images were used for the experiments,100 samples for each orange variety,which are publicly *** segmentation,263 parameters,including texture,color and shape features,were extracted from each sample using image *** them,the 6 most effective features were automatically selected by using a hybrid approach consisting of an artificial neural network and particle swarm optimization algorithm(ANN-PSO).Then,three different classifiers were applied and compared:hybrid artificial neural network–artificial bee colony(ANN-ABC);hybrid artificial neural network–harmony search(ANN-HS);and k-nearest neighbors(kNN).The experimental results show that the hybrid approaches outperform the results of *** average correct classification rate of ANN-HS was 94.28%,while ANN-ABS achieved 96.70%accuracy with the available data,contrasting with the 70.9%baseline accuracy of ***,this new proposed methodology provides a fast and accurate way to classify multiple fruits varieties,which can be easily implemented in processing *** main contribution of this work is that the method can be directly adapted to other use cases,since the selection of the optimal features and the configuration of the neural network are performed automatically using metaheuristic algorithms.

关键词： Computer vision Fruits classification Hybrid neural networks Image processing Metaheuristic algorithms

Tectonic paleostress field and its impact on the geodynamic evolution of Central Iran, case study: the Shotori Mountain

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Journal of Mountain Science 2023年第10期20卷 3018-3034页

作者： Razieh abbaspour Seyed Morteza MOUSAVI Ahmad RASHIDI Mohammad Mahdi KHATIB Shahram SHAFIEIBAFTI Department of Geology University of BirjandBirjand ***Iran Department of Earthquake Research Shahid Bahonar University of KermanKerman ***Iran International Institute of Earthquake Engineering and Seismology Tehran ***Iran Department of Geology Shahid Bahonar University of KermanKerman ***Iran

The Shotori mountain range is located along the northern terminus of the Nayband fault on the eastern and western domains of the Tabas and Lut blocks,*** range with NNW-SSE trending and approximately 120 km long includes a series of thrust faults approaching the right-lateral strike-slip Nayband *** the Shotori range has experienced various geological events since the Triassic,our investigations suggest that the basement of the Central Iranian subcontinent of the Shotori range contains the early Triassic deep sedimentary with normal faults which confirms Triassic tensional tectonic stress regime in the *** the middle Triassic,the mountain range has experienced thrust and strike-slip ***,in this study,we reconstruct the stress regimes for different geological periods using fault-slip *** inversion of faultslip data reveals drastic temporal changes in the maximum stress regime(σ1)over the Triassic,Jurassic,Cretaceous,Paleogene,Neogen,and *** reconstruction of the stress field based on the age and direction of fault movement reveals that the direction of the maximum horizontal stress axis(σ1)under a tensional stress regime was approximately N129°in the Early *** stress regime is the cause of thinning and subsidence of the Shotori sedimentary *** the middle Triassic,theσ1 direction was about N81°and the upper Triassic,theσ1 direction was almost N115°.The middle Triassic and upper Triassic stress states exhibited two distinct strike-slip and compressive stress *** stress regime led to the uplift of the Shotori sedimentary *** the Jurassic,the direction of the maximum horizontal stress axis(σ1)was~NW-SE under a compressive stress *** the Triassic,theσ1 direction was~*** stress regime led to the formation of the high topography of the Shotori Mountain *** the Late Cretaceous,the direction of the maximum horizontal stress axis(σ1)under the extensional stress

关键词： Paleostress Fault-slip data Geodynamics Shotori mountain range Tabas Central Iran

Urgent Changes to Be Made in Iran’s Primary Education:Voices From Teachers

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ECNU Review of Education 2023年第3期6卷 485-497页

作者： Iman Tohidian Ali Khorsandi Taskoh Abbas abbaspour Allameh Tabataba'i University

Highlights•One of the main shortcomings of the Iranian educational system is its focus on training students to succeed in different testing/assessment *** this regard,primary emphasis is still placed on memorization rather than learning dialogue,collaboration,tolerance,and life expectation for today’s globalized communities.•Few voices from Iranian teachers have been heard in international *** study collected focus group interviews from 84 Iranian primary school teachers in Tehran,Shiraz,and Yazd.•Findings show that the interviewed teachers agreed on the urgent curriculum changes,including English,Law,and Entrepreneurship in the primary ***,the educational focus should be broadened from the current emphasis on assessment from the early years of schooling.

关键词： Curriculum change education in Iran voices of teachers

Efficacy of combined albendazol and praziquntel and their loaded solid lipid nanoparticles components in chemoprophylaxis of experimental hydatidosis

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Asian Pacific Journal of Tropical Biomedicine 2017年第6期7卷 549-554页

作者： Ali Jelowdar Abdollah Rafiei Mohammad Reza abbaspour Iran Rashidi Mahmood Rahdar Department of Parasitology School of MedicineAhvaz Jundishapur University of Medical Sciences Health Research Institute Infectious and Tropical Diseases Research CenterFaculty of MedicineAhvaz Jundishapur University of Medical Sciences Targeted Drug Delivery Research Center School of PharmacyMashhad University of Medical Sciences Department of Pathology School of MedicineAhvaz Jundishapur University of Medical Sciences

Objective:To evaluate the efficacy of combined ABZ and PZQ and their solid lipid nanoparticles in chemoprophylaxis of cystic echinococcosis(CE).Methods:ABZ and PZQ loaded solid lipid nanoparticles(SLNs) were prepared by high shear homogenization and microemulsion congealing techniques with some minor *** average size,polydispersity index(PDI),and particle size distribution were determined by scanning electron microscopy(SEM) and photon correlation *** females BALB/c were experimentally infected by protoscoleces(PSC) and randomly divided into four equal groups of 10 *** the end of the 3 months treatment period and 2 months rest,mice were sacrificed and the peritoneal cavity was opened for removal,counting,measuring,and histological analysis of hydatid ***:The results indicated that ABZ and PZQ chemoprophylaxis treatment reduced the wet weight and size of developed cysts 77.3% and 79%,*** corresponding result for the ABZ and PZQ loaded SLNs was 83% and 85%,***:This study for the first time demonstrated that ABZ and PZQ loaded SLNs is superior to free ABZ and PZQ for the chemoprophylaxis of CE in mice.

关键词： Echinococcosis Albendazole Praziquantel High pressure homogenization Solid lipid nanoparticles(SLNs)