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A modified universal pedestrian motion model: Revisiting pedestrian simulation with bottlenecks

Building Simulation 2022年第4期15卷 631-644页

作者： Jianyu Wang Majid Sarvi Jian Ma milad Haghani Abdullah Alhawsawi Juan Chen Peng Lin School of Transportation and Logistics Notional Engineering Laboratory of Integrated Transportation Big Data Application TechnologySouthwest Jiaotong UniversityChengdu 610031China Transport Engineering Group Melbourne School of Engineering&ITThe University of MelbourneVictoria 3070Australia Institute of Transport and Logistics Studies Business SchoolThe University of SydneyNSWAustralia Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu 610031China

Pedestrian flow through narrow exits is one the most important features of crowd dynamics and *** is a particularly important aspect of pedestrian simulation models in that the accuracy is highly dependent on their ability to produce realistic exit flow *** firstly identified the four parameters that are most critical for physical interactions of the social force model and then calibrated them against two well-controlled pedestrian *** these calibrated parameters,we discussed the reasonable settings of sensitive parameters for different levels of pedestrian ***,we revisited the basic questions about the effect of the exit location,the bottleneck length,and the effect of obstacles on pedestrian *** simulation results indicated that:(1)The effect of the exit location on the pedestrian egress efficiency is uncertain,and the evacuation efficiency is also related to the exit width and the level of urgency.(2)The"pass-way"after the exit also named as the bottleneck length has a negative impact on the evacuation performance only in the scenarios that the bottleneck length is not more than 2.0 *** the bottleneck length exceeds 2.0 meters,pedestrian outflow efficiency reaches an asymptotic.(3)Setting an obstacle near an exit is not leading to a longer pedestrian evacuation time,instead,it is effectively improving pedestrian evacuation.

关键词： bottleneck pedestrian crowd simulation exit location bottleneck length obstacles location

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Simulation of Combustion Flow of Methane Gas in a Premixed Low-Swirl Burner using a Partially Premixed Combustion Model

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Journal of Thermal Science 2022年第5期31卷 1663-1681页

作者： XIAO Caiyuan OMIDI milad SURENDAR A. ALIZADEH As'ad BOKOV Dmitry O. BINYAMIN TOGHRAIE Davood Key Laboratory of Hunan Province for Efficient Power System and Intelligent Manufacturing Shaoyang422000China College of Mechanical and Energy Engineering Shaoyang UniversityShaoyang422000China Department of Mechanical Engineering Khomeinishahr BranchIslamic Azad UniversityKhomeinishahr119/84175Iran Department of Pharmacology Saveetha dental College and hospitalSaveetha institute of medical and technical sciencesChennai602105India Faculty of Engineering Soran UniversitySoran651Iraq Department of Mechanical Engineering College of EngineeringUniversity of ZakhoZakho1653654Iraq Institute of Pharmacy Sechenov First Moscow State Medical UniversityMoscow119991Russian Federation Department of Mechanical Engineering Faculty of Science and TechnologyUniversitas Muhammadiyah Kalimantan TimurSamarinda75124Indonesia

Because the rotational current stabilizes the flame by creating a recirculation zone,it may increase the risk of *** this reason,low-spin combustion is used to stabilize the flame while preventing ***,in this study,the combustion flow of methane gas in a low-swirl burner is simulated using a partially premixed combustion ***,the fuel flow rate is considered *** research parameters include swirl angle(θ=35°–47°),equivalence ratio(φ=0.6–0.9)and inlet axial flow radius(R=0.6–0.7)and effect of these parameters on temperature distribution,flame length,flame rise length,velocity field,and streamlines of the number of pollutant species are *** contours of streamline,temperature distribution,and velocity distribution are also presented for analysis of flow *** results show that with increasing the fuel-air ratio,the strength of the axial flow decreases,and the position of the maximum flame temperature shifts toward the inlet of the *** results also reveal that by increasing the swirl angle of the flow,the position of the minimum velocity value(opposite to the direction of the axis)tends towards the *** results also indicate that the maximum temperature of the combustion chamber increases with increasing the swirl angle,and inθ=35°,the maximum temperature is 1711℃and inθ=41°,this value is 1812℃.Finally,by increasing the swirl angle toθ=47°,the maximum flame temperature position is found at a considerable distance from the inlet and is 1842℃.

关键词： swirl burner numerical simulation axial velocity premixed combustion V-shaped flame

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Thermal stability of additively manufactured austenitic 304L ODS alloy

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Journal of Materials Science & Technology 2021年第24期83卷 208-218页

作者： milad Ghayoor Saereh Mirzababaei Anumat Sittiho Indrajit Charit Brian K.Paul Somayeh Pasebani School of Mechanical Industrial and Manufacturing EngineeringOregon State UniversityCorvallisOR97330United States Advanced Technology and Manufacturing Institute(ATAMI) CorvallisOR97330United States Materials Science and Engineering University of IdahoMoscowID83844United States

Thermal stability and high-temperature mechanical properties of a 304 L austenitic oxide dispersion strengthened(ODS)alloy manufactured via laser powder bed fusion(LPBF)are examined in this *** manufactured 304 L ODS alloy samples were aged at temperatures of 1000,1100,and 1200℃for 100 h in an argon *** characterization of LPBF 304 L ODS alloy before and after the thermal stability experiments revealed that despite the annihilation of dislocations,induced cellular substructure by the LPBF process was partially retained in the ODS alloy even after aging at1200℃.The size of Y-Si-O nanoparticles after aging at 1200℃increased from 25 to 50 *** analysis revealed that nanoparticles retained the microstructure of LPBF 304 L ODS and hindered recrystallization and further grain *** 600℃and 800℃,the yield stress of the 290 and 145 MPa were measured,respectively,which are substantially higher than 113 MPa,and 68 MPa for 304 L at the same ***,the creep properties of LPBF 304 L ODS alloy were evaluated at a temperature of 700℃under three applied stresses of 70,85,and 100 MPa yielding a stress exponent(n)of 7.7;the minimum creep rate at 100 MPa was found to be about two orders of magnitude lower than found in the literature for wrought 304 L stainless steel.

关键词： Laser powder bed fusion(LPBF) Oxide dispersion strengthened(ODS)alloy High-temperature Aging Thermal stability

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Natural convection heat transfer enhancement of different nanofluids by adding dimple fins on a vertical channel wall

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Chinese Journal of Chemical Engineering 2020年第3期28卷 643-659页

作者： milad Gholami Mohammad Reza Nazari Mohammad Hossien Talebi Farzad Pourfattah Omid Ali Akbari Davood Toghraie Department of Mechanical Engineering Yazd UniversityYazdIran School of Mechanical Engineering Science&Arts UniversityYazdIran Mechanical Engineering Department University of Kashan KashanIran Young Researchers and Elite Club Khomeinishahr BranchIslamic Azad UniversityKhomeinishahrIran Department of Mechanical Engineering Khomeinishahr BranchIslamic Azad UniversityKhomeinishahrIran

In this numerical study,natural flow and heat transfer of nanofluids with Al2O3,TiO2,Cu and CNT nanoparticles in a vertical channel with dimpled fins at Rayleigh number(Ra)of Ra=3.25×107 to Ra=1×108 are investigated by using the finite volume *** obtained results revealed that,using CNT in volume fractions of 2%and 4%leads to significant heat transfer and atφ=6%,using TiO2 nanoparticles has a great effect on Nu number ***,using solid nanoparticles in base fluid causes more uniform heat transfer distribution,especially in areas close to heated surface and by adding more volume fraction in base fluid,temperature level *** general,according to temperature contours,reduction of wall temperature depends on the increase of Ra and volume fraction and the type of solid nanoparticles.

关键词： Natural heat transfer Dimpled fins Rayleigh number Nanofluid

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Weighing and Prioritizing Noise Control Methods Using the Delphi Technique and the Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) in an Iranian Tire Manufacturing Factory

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Sound & Vibration 2020年第3期54卷 201-213页

作者： Mohammad Reza Ghotbi-Ravandi Davoud Hassanvand Sajad Zare milad Beytollahi Associate Professor Department of Occupational HealthSchool of Public HealthKerman University of Medical Sciences and Health ServicesKermanIran Master of Occupational Health Student Research CommitteeSchool of Public HealthKerman University of Medical Sciences and Health ServicesKermanIran Assistant Professor Department of Occupational HealthSchool of Public HealthKerman University of Medical Sciences and Health ServicesKermanIran Department of Industrial Engineering Faculty of EngineeringShahid Bahonar University of KermanKermanIran

Undoubtedly,noise has become a major hazardous issue in today’s industrial world,with a lot of people suffering from exposure to excessive noise in their work *** study was conducted to weigh and prioritize noise control methods in an Iranian tire manufacturing complex in *** Delphi method and the Technique for Order Preference by Similarity and an Ideal Solution(TOPSIS)were utilized for this *** cross-sectional,descriptive study was conducted in the baking hall of an Iranian tire manufacturing factory in *** weigh and prioritize noise control methods,Analytic Hierarchy Process(AHP)and TOPSIS were *** total,4 criteria and 8 alternatives were *** AHP and TOPSIS questionnaire was then designed to prioritize noise control methods in the light of the objectives,criteria,and ***,the collected data were fed into Expert Choise.V.11 and Excel and data analysis was carried out using *** results of data analysis indicated that the inconsistency rate in all the cases was smaller than 10%,hence the consistency of the responses was *** to the TOPSIS results and experts’opinions about the criteria,implementation and maintenance cost(with a weight of 0.481)and method effectiveness and efficiency(with a weight of 0.046)had the highest and lowest priority *** on the weights TOPSIS,the appropriate methods for controlling noise in tire manufacturing are designing and manufacturing silencer,requiring people in charge to quickly fix the leaks and change baking press washers on time.

关键词： Ranking noise control methods TOPSIS delphi technique

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Fast-dissolving antioxidant nanofibers based on Spirulina protein concentrate and gelatin developed using needleless electrospinning

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Food Bioscience 2022年第3期47卷 1281-1293页

作者： Vahid Mosayebi milad Fathi Mohammad Shahedi Nafiseh Soltanizadeh Zahra Emam-Djomeh Department of Food Science and Technology College of AgricultureIsfahan University of TechnologyIsfahan***Iran Department of Food Science and Engineering College of Agriculture & Natural ResourcesUniversity of TehranKarajIran

Spirulina is a microalga that is well-known for its high protein content and biological activities directly related to its antioxidant *** objective of this study was to produce fast-dissolving antioxidant nanofibers based on Spirulina protein concentrate (SPC) and gelatin using needleless electrospinning *** effect of mixing ratios of SPC (10% w/w) and gelatin (20% w/w) on the viscosity,electrical conductivity and surface tension of electrospinning solutions as well as diameter and morphology of resulting nanofibers was *** the SPC level in the solution blends resulted in a decrease in apparent viscosity and electrical conductivity and an almost stable trend in surface tension (29.25–32.19 mN/m) that led to diminish of diameter of the *** electron microscopy images showed that SPC/gelatin ratio of 40:60 led to the production of uniform and bead-free nanofibers with a relatively smaller average diameter (208.7 ± 46.5 nm).Atomic force microscopy images indicated mesh-like,fibrillary,and bead-free *** transform infrared spectroscopy verified the formation of composite nanofibers and intermolecular interactions between both proteins.X-ray diffraction and thermal analysis showed higher amorphous structure and stability of produced SPC/gelatin nanofibers in comparison to pure materials which was favorable for formation of stable fast-dissolving *** of DPPH and ABTS radical scavenging activities showed that the antioxidant activity of composite nanofibers significantly improved with increasing SPC mixing ratio (p < 0.05).The dissolution test demonstrated that SPC/gelatin nanofibers can be rapidly dissolved in aqueous medium within 2 ***,the results indicated that the electrospun SPC/gelatin nanofibers could be potentially used for nutraceutical delivery in food and packaging applications under high humidity.

关键词： Antioxidant activity Biopolymers Nanoencapsulation Rheology Spirulina Microalga

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Comparative study of haematological,serum electrolyte and nonelectrolyte parameters of male and female Persian sturgeon(Acipenser persicus)brood stocks

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Acta Oceanologica Sinica 2016年第8期35卷 39-43页

作者： ADEL milad PALANISAMY Satheesh Kumar SHAFIEI Shafigh FAZLI Hasan ZORRIEHZAHRA Mohammad Jalil Department of Aquatic Animal Health and Diseases Iranian Fisheries Science Research Institute(IFSRI)Agricultural Research Education and Extension Organization(AREEO)Tehran 13185-116Iran Department of Chemistry BiologicalPharmaceutical and Environmental ScienceUniversity of MessinaMessinaItaly Department of Aquatic Animal Health and Diseases Faculty of Veterinary MedicineUniversity of TehranTehran 14155-6453Iran Caspian Sea Ecological Research Institute Khazarabad BoolvarSari 961Iran

Sturgeons are the most important principal market species in the Caspian Sea. In the present study, measurement of blood parameters was carried out with the aim of evaluating the normal value of hematological and serum biochemical parameters of brood stocks Acipenser persicus during spawning season. Blood samples were collected from 36 brood stocks of A. persicus（18 males and 18 females） during the spawning season. Higher value of red blood cells, white blood cells, haemoglobin, haematocrit was observed in male breeders with significant differences between female breeders（p〉0.05）. Haemoglobin and haematocrit value in this study was within the range of 8.70 to 9.2 g/d L and 29.73% to 30.26%, respectively. The statistically significant differences between mean corpuscular volumes, mean corpuscular haemoglobin, lymphocyte and neutrophil percentages, aspartate aminotransferase, alkaline phosphatase and creatine kinase were observed in the male and female brood *** is concluded from this study, some of the hematological and serum biochemical parameters of male and female A. persicus breeders were significantly varied from each other. In comparative investigation with earlier reports,the values of red blood cells, haemoglobin and haematocrit are highly varied due to age variations of ***, further studies are necessary to understand the impact of sexual, age, size, length, and season and habitat variation. Serum biochemical parameters can be used for confirming the maturity of A. persicus and monitoring any changes in the water quality parameters and soil.

关键词： aquaculture brood stocks biochemistry haematology spawning

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Exploring the potential and safety of quantum dots in allergy diagnostics

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Microsystems & Nanoengineering 2023年第6期9卷 1-23页

作者： milad Mohkam Mohammad Sadraeian Antonio Lauto Ahmad Gholami Seyed Hesamodin Nabavizadeh Hossein Esmaeilzadeh Soheila Alyasin Allergy Research Center Shiraz University of Medical SciencesShirazIran Institute for Biomedical Materials and Devices(IBMD) Faculty of ScienceUniversity of Technology SydneySydneyNSW2007Australia School of Science University of Western SydneyCampbelltownNSW2560Australia School of Medicine University of Western SydneyCampbelltownNSW2560Australia Biotechnology Research Center Shiraz University of Medical SciencesShirazIran Department of Pharmaceutical Biotechnology School of PharmacyShiraz University of Medical SciencesShirazIran Department of Allergy and Clinical Immunology Namazi HospitalShiraz University of Medical SciencesShirazIran

Biomedical investigations in nanotherapeutics and nanomedicine have recently intensified in pursuit of new therapies with improved *** dots(QDs)are promising nanomaterials that possess a wide array of advantageous properties,including electronic properties,optical properties,and engineered biocompatibility under physiological *** to these characteristics,QDs are mainly used for biomedical labeling and theranostic(therapeutic-diagnostic)*** can be functionalized with ligands to facilitate their interaction with the immune system,specific IgE,and effector cell ***,undesirable side effects such as hypersensitivity and toxicity may occur,requiring further *** review systematically summarizes the potential uses of QDs in the allergy *** overview of the definition and development of QDs is provided,along with the applications of QDs in allergy studies,including the detection of allergen-specific IgE(sIgE),food allergens,and sIgE in cellular *** potential treatment of allergies with QDs is also described,highlighting the toxicity and biocompatibility of these ***,we discuss the current findings on the immunotoxicity of *** favorable points regarding the use of QDs for allergy diagnosis and treatment are noted.

关键词： allergy diagnosis potential

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Ultrasonic synthesis of Zn-doped CdO nanostructures and their optoelectronic properties

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Transactions of Nonferrous Metals Society of China 2018年第11期28卷 2256-2265页

作者： milad KAVAKEBI Farid JAMALI-SHEINI Department of Materials Science and Engineering Ahvaz BranchIslamic Azad UniversityAhvazIran Advanced Surface Engineering and Nano Materials Research Center Department of PhysicsAhvaz BranchIslamic Azad UniversityAhvazIran

The effect of Zn dopant on the growth of cadmium oxide （CdO） nanostructures through a sonochemical method wasinvestigated. The X-ray diffraction （XRD） patterns of the nanoparticles show CdO cubic structures for the produced samples. Fieldemission scanning electron microscope （FESEM） images reveal that morphologies of the samples change, when they are doped withZn atoms, and their sizes reduce. Room temperature photoluminescence （PL） and UV-Vis spectrometers were used to study opticalproperties of the samples. Evaluation of optical properties indicates that different emission bands result from different transitions andthe value of CdO energy band gap increases due to doping. Studies of electrical properties of the nanostructures demonstrate that Zndopant enhances electrical conductivity and photocurrent generation as the result of light illumination on the nanostructures due toimproved density of photo-generated carriers. Considering the obtained outcomes, Zn dopant can alter the physical property of theCdO nanostructures.

关键词： Zn-doped CdO nanostructures ultrasonication method optical properties electrical properties

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Evaluation of in vitro digestibility of Aspergillus oryzae fungal biomass grown on organic residue derived‑VFAs as a promising ruminant feed supplement

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Journal of Animal Science and Biotechnology 2023年第6期14卷 2614-2629页

作者： Clarisse Uwineza Mohammadali Bouzarjomehr milad Parchami Taner Sar Mohammad J.Taherzadeh Amir Mahboubi Swedish Centre for Resource Recovery University of Boras50190 BorasSweden

Background As demand for high quality animal feed continues to raise,it becomes increasingly important to mini-mize the environmental impact of feed *** appealing sustainable approach to provide feed fractions is to use organic residues from agro-food *** this regard,volatile fatty acids(VFAs)such as acetic,propionic and butyric acids,derived from bioconversion of organic residues can be used as precursors for production of micro-bial protein with ruminant feed inclusion *** study aims to investigate the in vitro digestibility of the Asper-gillus oryzae edible fungal biomass cultivated on VFAs-derived from anaerobic digestion of *** produced fungal protein biomass,along with hay clover silage and rapeseed meal were subjected to various in vitro assays using two-stage Tilley and Terry(TT),gas,and bag methods to evaluate and compare its digestibility for application in ruminant *** The produced fungal biomass contained a higher crude protein(CP)(41%–49%)and rather similar neutral detergent fiber(NDF)(41%–56%)compared to rapeseed *** rumen in vitro dry matter digestibility(IVDMD)of the fungal biomass in the TT method ranged from 82%to 88%(statistically similar to that of the gas method(72%to 85%)).The IVDMD of fungal biomass were up to 26%and 40%greater than that of hay clover silage and rapeseed meal,*** type of substrate and bag method had pronounced effect on the fermentation products(ammonium-N(NH4+-N),total gas and VFAs).Fungal biomass digestion resulted in the highest release of NH4+-N(340–540 mg/L)and the ratio of acetate to propionate ratio(3.5)among subjected *** The results indicate that gas method can be used as a reliable predictor for IVDMD as well as fermenta-tion ***,the high IVDMD and fermentation product observed for Aspergillus oryzae fungal biomass digestion,suggest that the supplementation of fungal biomass will contribute to improving the rumen diges

关键词： Aspergillus oryzae Fungal biomass In vitro dry matter digestibility Ruminant feed Volatile fatty acids

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