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An improved probabilistic load flow in distribution networks based on clustering and Point estimate methods

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Energy and AI 2023年第4期14卷 253-261页

作者： Morsal Salehi mohammad Mahdi rezaei Department of Electrical Engineering Khomeinishahr BranchIslamic Azad UniversityKhomeinishahrIsfahanIran

Clustering approaches are one of the probabilistic load flow(PLF)methods in distribution networks that can be used to obtain output random variables,with much less computation burden and time than the Monte Carlo simulation(MCS)***,a challenge of the clustering methods is that the statistical characteristics of the output random variables are obtained with low *** paper presents a hybrid approach based on clustering and Point estimate *** the proposed approach,first,the sample points are clustered based on the𝑙-means method and the optimal agent of each cluster is ***,for each member of the population of agents,the deterministic load flow calculations are performed,and the output variables are ***,a Point estimate-based PLF is performed and the mean and the standard deviation of the output variables are ***,the statistical data of each output random variable are modified using the Point estimate *** use of the proposed method makes it possible to obtain the statistical properties of output random variables such as mean,standard deviation and probabilistic functions,with high accuracy and without significantly increasing the burden of *** order to confirm the consistency and efficiency of the proposed method,the 10-,33-,69-,85-,and 118-bus standard distribution networks have been simulated using coding in Python®programming *** simulation studies,the results of the proposed method have been compared with the results obtained from the clustering method as well as the MCS method,as a criterion.

关键词： Probabilistic load flow(PLF) Distribution network(DN) Monte Carlo simulation(MCS) k-means clustering(KMC) Point estimate method(PEM)

Development of a time-dependent energy model to calculate the mining-induced stress over gates and pillars

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Journal of Rock Mechanics and Geotechnical Engineering 2015年第3期7卷 306-317页

作者： mohammad rezaei mohammad Farouq Hossaini Abbas Majdi School of Mining Engineering College of Engineering University of Tehran

Generally, longwall mining-induced stress results from the stress relaxation due to destressed zone that occurs above the mined panel. Knowledge of induced stress is very important for accurate design of adjacent gateroads and intervening pillars which helps to raise the safety and productivity of longwall mining operations. This study presents a novel time-dependent analytical model for determination of the longwall mining-induced stress and investigates the coefficient of stress concentration over adjacent gates and pillars. The model is developed based on the strain energy balance in longwall mining incorporated to a rheological constitutive model of caved materials with time-varying parameters. The study site is the Tabas coal mine of Iran. In the proposed model, height of destressed zone above the mined panel, total longwall mining-induced stress, abutment angle, induced vertical stress, and coefficient of stress concentration over neighboring gates and intervening pillars are calculated. To evaluate the effect of proposed model parameters on the coefficient of stress concentration due to longwall mining, sensitivity analysis is performed based on the field data and experimental constants. Also, the results of the proposed model are compared with those of existing models. The comparative results confirm a good agreement between the proposed model and the in situ measurements. According to the obtained results, it is concluded that the proposed model can be successfully used to calculate the longwall mining-induced stress. Therefore, the optimum design of gate supports and pillar dimensions would be attainable which helps to increase the mining efficiency.

关键词： Longwall mining Strain energy Time-dependent model Destressed zone Mining-induced stress

A two-stage DEA model to evaluate sustainability and energy efficiency of tomato production

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Information Processing in Agriculture 2017年第4期4卷 342-350页

作者： Hossein Raheli Rassul mohammad rezaei Mehri Raei Jadidi Hassan Ghasemi Mobtaker Department of Agricultural Economics Faculty of AgricultureUniversity of TabrizTabrizIran Department of Biosystems Engineering Faculty of AgricultureUniversity of TabrizTabrizIran

The aims of this study were to evaluate the sustainability and efficiency of tomato production and to investigate the determinants of inefficiency of tomato farming in Marand region of East Azerbaijan province,*** these purposes,a two-stage methodology was applied,in which for the first time a fractional regression model(FRM)was employed in the second stage of analysis,so that,in the first stage a nonparametric Data Envelopment Analysis(DEA)was used to analyze the efficiencies of tomato production and in the second stage,farm specific variables such as education level,farmers’age,total land size and use of manure were used in a fractional regression model to explain how these factors influenced efficiency of tomato *** results of the first stage showed that there are considerable differences between efficient and inefficient farmers in the studied area,so that the main differences were in the use of chemical fertilizers,biocides and water for ***,the results of second stage revealed that farmers’age,education level and total land size positively affected efficiency in tomato ***,better use of land,chemical fertilizers,water for irrigation and improving the farmers’educational levels through literacy campaign and land consolidation would probably increase the efficiency in the long term.

关键词： Data envelopment analysis Energy efficiency Fractional regression model Tomato

Potentially Toxic Element Concentration in Fruits Collected from Markazi Province(Iran): A Probabilistic Health Risk Assessment

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Biomedical and Environmental Sciences 2019年第11期32卷 839-853页

作者： mohammad rezaei Bahareh Ghasemidehkordi Babak Peykarestan Nabi Shariatifar Maryam Jafari Yadolah Fakhri Maryam Jabbari Amin Mousavi Khaneghah Department of Food Hygiene Faculty of Veterinary MedicineUniversity of TehranTehranIran Department of Food Safety and Hygiene School of Public HealthTehran University of Medical SciencesTehranTran Department of Biochemistry Payame Noor UniversityIsfahanIran Department of Agriculture Payame Noor UniversityTehranTran Department of Environmental Health Engineering School of Public Health and SafetyStudent Research CommitteeShahid Beheshti University of Medical SciencesTehranTran Department of Public Health School of Paramedical and HealthZanjan University of Medical SciencesZanjaniran Department of Food Science Faculty of Food EngineeringUniversity of Campinas(UNICAMP)Rua Monteiro Lobato80.Caixa Postal:6121.CEP:13083-862.Campinas.Sao Paulo.Brazil

Objective This study was conducted to evaluate the concentration of potentially toxic elements(PTEs)such as arsenic(As),cadmium(Cd),mercury(Hg),and lead(Pb)in fruit samples collected from Markazi Province,Iran.A probabilistic health risk assessment due to ingestion of PTEs through the consumption of these fruits was also *** The concentration of PTEs in 90 samples of five types of fruits(n=3)collected from six geographic regions in Markazi Province was *** potential health risk was evaluated using a Monte Carlo simulation *** A significant difference was observed in the concentration of PTEs between fruits as well as soil and water samples collected from different regions in Markazi *** order of PTE concentration in the soil and water samples was as follows:Pb>As>Hg>***,the highest level of transfer factor for Cd and Hg correlated with the *** estimated daily intake for adults and children was lower than the recommended tolerable daily *** The population in Markazi Province,Iran,is not at considerable noncarcinogenic or carcinogenic risk due to the ingestion of PTEs through the consumption of the examined fruits.

关键词： Fruits Soil Water Toxic elements Target Hazard Quotient(THQ) Estimated Hazard Index(HI)

Multi-millijoule terahertz emission from laser- wakefield-accelerated electrons

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Light(Science & Applications) 2023年第2期12卷 248-258页

作者： Taegyu Pak mohammad rezaei-Pandari Sang Beom Kim Geonwoo Lee Dae Hee Wi Calin loan Hojbota mohammad Mirzaie Hyeongmun Kim Jae Hee Sung Seong Ku Lee Chul Kang Ki-Yong Kim Center for Relativistic Laser Science Institute for Basic ScienceGwangju 61005Korea Department of Physics and Photon Science Gwangju Institute of Science and Technology(GIST)Gwangju 61005Korea Laser and Plasma Research Institute Shahid Beheshti UniversityTehranIran Advanced Photonics Research Institute GISTGwangju 61005Korea Institute for Research in Electronics and Applied Physics and Department of Physics University of MarylandCollege ParkMaryland 20742USA

High-power terahertz radiation was observed to be emitted from a gas jet irradiated by 100-terawatt-class laser pulses in the laser-wakefield acceleration of *** emitted terahertz radiation was characterized in terms of its spectrum,polarization,and energy dependence on the accompanying electron bunch energy and charge under various gas target *** a nitrogen target,more than 4 mJ of energy Was produced at<10 THz with a laser-to-terahertz conversion efficiency of~0.15%.Such strong terahertz radiation is hypothesized to be produced from plasma electrons accelerated by the ponderomotive force of the laser and the plasma wakefelds on the time scale of the laser pulse duration and plasma *** model is examined with analytic calculations and particle-in-cell simulations to better understand the generation mechanism of high-energy terahertz radiation in laser-wakefield acceleration.

关键词： laser polarization acceleration

From Entry to Evasion:A Comprehensive Analysis of Host-Virus Interactions for Monkeypox

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Infectious Microbes & Diseases 2024年第2期6卷 56-64页

作者： Vahideh Hamidi Sofiani mohammad rezaei Zadeh Rukerd Javad Charostad mohammad Pardeshenas Reza Ghazi Nasir Arefinia Sara Shafieipour Faranak Salajegheh Mohsen Nakhaie Department of Microbiology Golestan University of Medical SciencesGorganIran Gastroenterology and Hepatology Research Center Institute of Basic and Clinical Physiology SciencesKerman University of Medical SciencesKermanIran Universal Scientific Education and Research Network(USERN) TehranIran Department of Microbiology Faculty of MedicineShahid Sadoughi University of Medical SciencesYazdIran Department of Microbiology School of MedicineKerman University of Medical SciencesKermanIran Department of Biotechnology Golestan University of Medical SciencesGorganIran Student Research Committee Jiroft University of Medical SciencesJiroftIran Physiology Research Center Institute of NeuropharmacologyKerman University of Medical SciencesKermanIran Clinical Research Development Unit School of MedicineAfzalipour HospitalKerman University of Medical SciencesKermanIran

Monkeypox(Mpox)has posed a novel challenge and emerged as a threat to global public health since the onset of its outbreak in *** is spreading throughout the world in both endemic and non-endemic countries,indicating that its behavior is *** prevalence of Mpox and the risk of a global pandemic necessitate a better understanding of Mpox virus replications and interactions with the ***,we attempted to provide a detailed comprehensive review of Mpox virus behavior at the molecular level from the entry level to the establishment of a successful infection,including attachment and entry,DNA replication,protein expression and viron assembly and *** review also describes its strategies to evade host immune responses and inhibit apoptosis,and uncovers underlying molecular mechanisms such as subverted signaling pathways and cellular factors behind host-viral interactions.

关键词： monkeypox immunity apoptosis virus-host interaction

Attitude Control of a Quadrotor with Optimized PID Controller

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Intelligent Control and Automation 2013年第3期4卷 335-342页

作者： Hossein Bolandi mohammad rezaei Reza Mohsenipour Hossein Nemati S. M. Smailzadeh East Tehran (Qiam Dasht) Branch Islamic Azad University Tehran Iran Electrical Engineering Department Iran University of Science and Technology Tehran Iran

A new approach to control, stabilization and disturbance rejection of attitude subsystem of quadrotor is presented in this article. Analytical method is used to tune conventional structure of PID controller. SISO approach is implemented for control structure to achieve desired objectives. The performance of the designed control structure is evaluated through time domain factors such as overshoot, settling time and integral error index, and robustness. A comparison is done between designed controller and back-step controller applied to main model of quadrotor. The results of simulation show the effectiveness of designed control scheme.

关键词： Modeling Optimization PID Control Quadrotor

An Empirical Study on Microbial Load and Acidity in Raw Milk Produced in Malayer and Nahavand Cities, Iran 2012

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Health 2014年第16期6卷 2184-2189页

作者： mohammad rezaei Ali Asghar Behzadi Ali Akbar Malekirad Ahmad Fattahi Mohamad Hadi Farahzadi mohammad Sarmadi Hasan mohammadi Aghamirlou Reza Ali Fallahzadeh Department of Food Safety and Hygiene School of Public Health Tehran University of Medical Sciences Tehran Iran Department of Food Safety and Hygiene School of Health Yazd University of Medical Sciences Yazd Iran Department of Biology Payame Noor University Tehran Iran Department of Occupational Health Engineering School of Health Shahid Sadoughi University of Medical Sci-ences Yazd Iran Department of Neuroscience School of Advanced Technologies in Medicine Tehran University of Medical Sciences Tehran Iran Department of Environmental Health and Engineering School of Public Health Tehran University of Medical Sciences Tehran Iran Department of Environmental Health Engineering School of Health Shahid Sadoughi University of Medical Sciences Yazd Iran

Milk is very susceptible for growth and development of many microorganisms because it is rich in nutrients and has suitable condition. Thus, it is very vital to respect sanitary conditions at all stages of production and transport of raw milk. The objective of the present investigation was to determine the total bacterial, and acidity in raw milk from milk collection centers in Malayer and Nahavand cities. 52 milk samples were collected from 13 centers in summer 2012 and were analyzed according to standard methods. None of the raw milk samples under investigation, had superior or grade 1 quality. Only 7.7% of the samples were classified as raw milk with grade 2 quality and 92.3% were non-standard. The mean of microbial total count in base was 3.8 × 107 CFU/ml and average acidity in the samples was 0.163. The city of Tochqhaz and Aliabade-Damagh has the lowest and the highest microbial total count. In general the result of this study showed unsatisfactory conditions of milk in the milk collection centers of the Malayer and Nahavand cities.

关键词： Food Safety Milk Collection Centers Acidity Microbial Total Counts

Assessment of dairy products consumed on the Arakmarket as determined by heavy metal residues

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Health 2014年第5期6卷 323-327页

作者： mohammad rezaei Hajar Akbari Dastjerdi Hassan Jafari Ali Farahi Arman Shahabi Hossein Javdani Hossein Teimoory mohammad Yahyaei Ali Akbar Malekirad Arak University of Medical Sciences Arak Iran Department of Biology Payame Noor University Tehran Iran Department of Food Safety and Hygiene School of Public Health Tehran University of Medical Sciences (TUMS) Tehran Iran Department of New Sciences and Technologies Life Science Engineering Group University of Tehran Tehran Iran Department of Veterinary School of Veterinary Shahid Bahonar University of Kerman Kerman Iran Soren Tech Toos Laboratory Food & Biotechnology North East Town Toos Industrial Town Mashhad Iran

Dairy products are nutritious drink and can play a significant part in a healthy diet. The safety of dairy products decreases with increasing concentration of toxic compounds and environmental pollutants (especially heavy metals). In the present study, the contamination of Al, Sn, As, Cd, Hg and Pb in dairy products (pasteurized milk, yogurt, yogurt drink, cheese) consumed in Arak, Iran, 2013 was evaluated using inductively coupled plasma mass spectrometry (ICP-SFMS) method. To meet the aim, 60 samples of 5 different brands, consisting of pasteurized milk, yogurt, yogurt drink, cheese (n = 15) were selected and analyzed for heavy metals content. 100% of the samples were positive regarding the total average and range concentration of Al, Sn, As, Cd, Hg and Pb in dairy products was 168.25 ± 92.2 (30.6 - 356.5), 5.9 ± 4 (1.1 - 16), 3.2 ± 1.95 (0.4 - 8.1), 4.55 ± 2.6 (0.6 - 10.6), 23.15 ± 10.4 (6.8 - 50.2) and 15.4 ± 8.53 (3.1 - 40.2) μg/kg, respectively. 28.3% (17 of 60 samples) of dairy products samples had lead (Pb) greater than EU limit and national Iranian standard (20 μg/kg). Statistical analysis indicated except about As in pasteurized milk and cheese there was no significant difference between products in terms of heavy metals content.

关键词： Heavy Metals Milk Cheese Yogurt Food Safety ICP