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Computer Modeling in Engineering & Sciences 2022年第3期130卷 1349-1369页

作者： M.R.Hematiyan B.Jamshidi M.mohammadi Department of Mechanical Engineering Shiraz UniversityShiraz71936Iran Department of Mechanical Engineering College of EngineeringShiraz BranchIslamic Azad UniversityShiraz71993Iran

The method of fundamental solutions(MFS)is a boundary-type and truly meshfree method,which is recognized as an efficient numerical tool for solving boundary value *** geometrical shape,boundary conditions,and applied loads can be easily modeled in the *** capability makes the MFS particularly suitable for shape optimization,moving load,and inverse ***,it is observed that the standard MFS lead to inaccurate solutions for some elastostatic problems with stress concentration and/or highly anisotropic *** thiswork,by a numerical study,the important parameters,which have significant influence on the accuracy of the MFS for the analysis of two-dimensional anisotropic elastostatic problems,are *** studied parameters are the degree of anisotropy of the problem,the ratio of the number of collocation points to the number of source points,and the distance between main and pseudo *** is observed that as the anisotropy of the material increases,there will be more errors in the *** is also observed that for simple problems,increasing the distance between main and pseudo boundaries enhances the accuracy of the results;however,it is not the case for complicated ***,it is concluded that more collocation points than source points can significantly improve the accuracy of the results.

关键词： Meshfree method degree of anisotropy location of source points anisotropic elasticity least squares MFS

Design, synthesis, and nanoengineered modification of spherical graphene surface by layered double hydroxide (LDH) for removal of As (Ⅲ) from aqueous solutions

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Chinese Journal of Chemical Engineering 2023年第1期53卷 374-380页

作者： Najma Kamali Jahan B.Ghasemi Ghodsi mohammadi Ziarani Sahar Moradian Alireza Badiei School of Chemistry College of ScienceUniversity of TehranTehranIran Department of Organic Chemistry Faculty of ChemistryAlzahra UniversityVanak SquareTehranIran

In this study, new nano spherical graphene modified with LDH(Layered Double Hydroxide) was prepared and used to remove As(Ⅲ) ion from aqueous solutions. At first, graphene oxide was synthesized from graphite using a well-known Hammer method. The obtained graphene oxide solution was sprayed in octanol solution under different temperatures and sprayed speed as influenced variables. The structure and physical characterization of synthesized spherical graphene oxide were determined by various techniques,including FT-IR, N_(2) adsorption–desorption, SEM, TEM, and EDX. In the next step, the hydrothermal method was applied to deposition LDH on the spherical graphene oxide. The synthesized spherical graphene modified by LDH was used to remove As(Ⅲ) as a toxic heavy metal ion. The effect of influenced variables including p H, contact time, amount of sorbent, and type eluent studied and the optimum values were as 8, 30, 50, and HCl(0.5 mol·L^(-1)), respectively. After optimization, the studied sorbent was shown a high adsorption capacity(149.3 mg·g^(-1)). The adsorption mechanism and kinetic models exhibited good agreement with the Langmuir isotherm and pseudo-second-order trends, respectively. Besides, the synthesized product was tested for seven times without significant loss in its sorption efficiency.

关键词： Graphene-based spherical adsorbent Layered double hydroxide(LDH) Adsorption Spray-assisted deep-frying

Chemical identification,antioxidant,cholinesterase inhibitory,and cytotoxic properties of fucoidan extracted from Persian Gulf Sargassumangustifolium

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Acta Oceanologica Sinica 2022年第12期41卷 133-141页

作者： Arghavan Hosseinpouri Mehdi mohammadi Elham Ehsandoost Paria Sharafi-Badr Narges Obeidi Department of Cellular and Molecular Sciences Faculty of SciencesPersian Gulf UniversityBushehr 75168Iran Department of Marine Biotechnology Persian Gulf InstitutePersian Gulf UniversityBushehr 75168Iran Department of Biotechnology Persian Gulf Algae Development TechnologyDelvar Industrial Zone No.55Bushehr 75168Iran Department of Food Science and Technology Shiraz UniversityShiraz 71441-65186Iran Department of Pharmacognosy and Pharmaceutical Biotechnology School of PharmacyIran University of Medical SciencesTehran 14496-14535Iran Department of Hematology Faculty of ParamedicineBushehr University of Medical SciencesBushehr 75146-33341Iran

Marine macroalgal sulfated fucose-containing polysaccharides,like fucoidan,have drawn significant attention due to their biotechnological potentials,such as anti-cancer,antioxidant,and anti-cholinesterase *** fucoidan derived from brown macroalgae Sargassum angustifolium species(FSA)was investigated for its cytotoxic effects and alterations in cell proliferation,and cell cycle-related gene expression in the present study occurred on NB4 cell *** results showed that FSA would induce p53,p21,pro-apoptotic genes and increase expression of the p15 gene as a cell arrest ***,FSA inhibited the anti-apoptotic effect of the Bcl-2 gene and decreased dnmt-1 gene *** significantly exhibited potent 2,2-diphenyl-1-picrylhydrazyl(DPPH)radical scavenging activity(p<0.05)with an IC_(50) value of 0.157 mg/mL and showed moderate anti-acetylcholinesterase activity with an IC_(50) value of 1.20μg/*** results indicated the potential of FSA for the development of therapeutic or preventive agents of cancer and Alzheimer’s disease mainly through cytotoxic effect and AChE(acetylcholinesterase)inhibition as well as additional antioxidant capacities.

关键词： fucoidan Sargassum angustifolium cytotoxicity antioxidant anti-cholinesterase

An Investigation of the Effects of Curcumin on Anxiety and Depression in Obese Individuals:A Randomized Controlled Trial

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Chinese Journal of Integrative Medicine 2015年第5期21卷 332-338页

作者： Habibollah Esmaily Amirhossein Sahebkar Mehrdad Iranshahi Shiva Ganjali Akram mohammadi Gordon Ferns majid Ghayour-Mobarhan Department of Biostatistics and Epidemiology Research Health CenterSchool of HealthMashhad University of Medical Sciences Neurogenic Inflammation Research Center Mashhad University of Medical Sciences Biotechnology Research Center Mashhad University of Medical Sciences Department of Modern Sciences and Technologies Mashhad University of Medical Sciences Cardiovascular Research Center Mashhad University of Medical Sciences Division of Medical Education Rm 342Mayfield HouseUniversity of Brighton Biochemistry of Nutrition Research Center Mashhad University of Medical Sciences

Objective： To investigate the effectiveness of curcumin, a natural polyphenolic compound with antioxidant and anti-inflammatory activities, on the frequency of symptoms of anxiety and depression in obese individuals. Methods： In this double blind, cross-over trial, 30 obese subjects were randomized to receive either curcumin （1 g/day） or placebo for a period of 30 days. Following a wash-out interval of 2 weeks, each subject was crossed over to the alternative regimen for a further 30 days. Severity of anxiety and depression was assessed at baseline and at weeks 4, 6 and 10 of the trial using the Beck Anxiety Inventory （BAI） and Beck Depression Inventory （BDI） scales, respectively. Results： Mean BAI score was found to be significantly reduced following curcumin therapy （P=0.03）. However, curcumin supplementation did not exert any significant impact on BDI scores （P=0.7）. Conclusion： Curcumin has a potential anti-anxiety effect in individuals with obesity.

关键词： Curcuma Ionga curcumin phenolic psychological disorders Beck Anxiety Inventory scale BeckDepression Inventory scale

Assessment of the relationship between the return to work and the severity of work-related upper limb injuries using the whole person impairment

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中华创伤杂志：英文版 2023年第2期26卷 77-82页

作者： Mahin Hosseininejad Shima Javadifar Saber mohammadi Elham Mirzamohammadi Occupational Medicine Department School of MedicineIran University of Medical SciencesTehranIran

Purpose:Upper limb disorders are one of the most common and important types of occupational ***,identifying the factors influencing return to work following these injuries is essential to reduce the dimensions of the *** this study,we investigated the return to work and associated factors following occupational injuries leading to upper limb ***:In this retrospective cohort study,the rate of return to work and associated factors were assessed in 256 workers with work-related upper limb injury referred to a teaching hospital from March 2011 to December *** inclusion criterion was a history of occupational injury resulting in upper limb impairment,and exclusion criteria included the presence of simultaneous impairment in other organs,congenital or non-occupational limb defects as well as patients with incomplete information in their medical ***’’ records,including age at the time of injury,gender,date of injury,marital status,education,level of amputation and injury,whole person impairment (WPI) and physiotherapy (prescribed by the physician) were *** WPI was calculated to assess the extent of the *** analyzes were performed by SPSS version ***:The rate of return to work was 54.3%,in which 51.8% for the same job and 48.2% for a new *** main factors associated with non-return to work were more days off work (p = 0.001),higher injury severity (p = 0.001),and dominant hand injury (p = 0.034).Conclusion:The number of days off work,the WPI,and dominant hand injury are the most important determinant in returning to *** addition,increased job satisfaction and support from co-workers and employers are work-related factors that can lead to an increased return to work.

关键词： Occupational injury Upper limb impairment Return to work Whole person impairment

Effects of heat treatment on the corrosion behavior and mechanical properties of biodegradable Mg alloys

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Journal of Magnesium and Alloys 2022年第7期10卷 1737-1785页

作者： Meysam mohammadi Zerankeshi Reza Alizadeh Ehsan Gerashi Mohammad Asadollahi Terence G.Langdon Department of Materials Science and Engineering Sharif University of TechnologyTehranIran Materials Research Group Department of Mechanical EngineeringUniversity of SouthamptonSouthampton SO171BJUnited Kingdom

Biodegradable magnesium(Mg)alloys exhibit great potential for use as temporary structures in tissue engineering *** degradable implants require no secondary surgery for their *** addition,their comparable mechanical properties with the human bone,together with excellent biocompatibility,make them a suitable candidate for fracture ***,some challenges *** degradation of the Mg-based alloys in physiological environments leads to a loss of the mechanical support that is needed for complete tissue healing and also to the accumulation of hydrogen gas bubbles at the interface of the implant and *** different methods used to improve the performance of the biodegradable Mg alloys to address these challenges,it appears that heat treatment is the most effective way to modify the microstructure and thus the corrosion behavior and mechanical properties without changing the composition or shape of the alloys.A desirable combination of corrosion and mechanical properties can be obtained through a precise control of the heat treatment *** this report,the effects of different heat treatments(T4 and T6)on the microstructure,corrosion behavior,and mechanical properties of some of the most important heat-treatable biodegradable Mg alloys(Mg-Zn,Mg-Gd,Mg-Y,Mg-Nd,Mg-Al and Mg-Ag)are examined as well as new perspectives to enhance their clinical implementation.

关键词： Biodegradable implants Corrosion rate Heat treatment Mechanical properties Mg alloys

A Global Best-guided Firefly Algorithm for Engineering Problems

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Journal of Bionic Engineering 2023年第5期20卷 2359-2388页

作者： Mohsen Zare Mojtaba Ghasemi Amir Zahedi Keyvan Golalipour Soleiman Kadkhoda mohammadi Seyedali Mirjalili Laith Abualigah Department of Electrical Engineering Faculty of EngineeringJahrom UniversityJahrom***FrasIran Department of Electronics and Electrical Engineering Shiraz University of TechnologyShiraz***Iran Department of Electrical and Computer Engineering Tarbiat Modares UniversityTehran***Iran Department of Computer Engineering Sari BranchIslamic Azad UniversitySari***Iran Department of Electrical Engineering Urmia BranchIslamic Azad UniversityUrmia571696896Iran Centre for Artificial Intelligence Research and Optimisation Torrens University AustraliaBrisbaneQLD4006Australia Yonsei Frontier Lab Yonsei UniversitySeoul03722South Korea Computer Science Department Prince Hussein Bin Abdullah Faculty for Information TechnologyAl Al-Bayt UniversityMafraq25113Jordan Hourani Center for Applied Scientific Research Al-Ahliyya Amman UniversityAmman19328Jordan Faculty of Information Technology Middle East UniversityAmman11831Jordan School of Computer Sciences Universiti Sains Malaysia11800George TownPulau PinangMalaysia University Research and Innovation Center Obuda University1034BudapestHungary School of Engineering and Technology Sunway University MalaysiaPetaling Jaya27500Malaysia Applied science research center Applied science private universityAmman11931Jordan

The Firefly Algorithm(FA)is a highly efficient population-based optimization technique developed by mimicking the flashing behavior of fireflies when *** article proposes a method based on Differential Evolution(DE)/current-to-best/1 for enhancing the FA's movement *** proposed modification increases the global search ability and the convergence rates while maintaining a balance between exploration and exploitation by deploying the global best ***,employing the best solution can lead to premature algorithm convergence,but this study handles this issue using a loop adjacent to the algorithm's main ***,the suggested algorithm’s sensitivity to the alpha parameter is reduced compared to the original *** GbFA surpasses both the original and five-version of enhanced FAs in finding the optimal solution to 30 CEC2014 real parameter benchmark problems with all selected alpha ***,the CEC 2017 benchmark functions and the eight engineering optimization challenges are also utilized to evaluate GbFA’s efficacy and robustness on real-world problems against several enhanced *** all cases,GbFA provides the optimal result compared to other *** that the source code of the GbFA algorithm is publicly available at https://***/projects/gbfa.

关键词： Firefly algorithm New movement vector Global best-guided firefly algorithm Global optimization Engineering design

A model for selecting green suppliers through interval-valued intuitionistic fuzzy multi criteria decision making models

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Journal of Management Analytics 2022年第1期9卷 60-85页

作者： Seyedeh Saeedeh mohammadi Adel Azar Ali Rajabzadeh Ghatari Moslem Alimohammadlou Faculty of Management and Economics Tarbiat Modares UniversityTehranIran Management Department Shiraz UniversityEram Campus of Shiraz UniversityShirazIran

This study sought to construct a model for selecting green *** study was conducted in three phases:in phase 1,the literature was reviewed based on the meta-synthesis method and experts’opinions were analyzed to create a model composed of 11 dimensions and 40 criteria for selecting green *** phase 2,intuitionistic fuzzy best-worst method was used to weight the dimensions and *** most important dimension was“green image”and the most important criteria were the“environmental protection system”and a good“public image.”In phase 3,four suppliers in the field of medical equipment were assessed and *** study proposed a framework for selecting green supplier selection(GSC)and could prove to be more comprehensive than the existing models as it drew on the meta-synthesis *** innovation of the study was its reliance on the intuitionistic fuzzy set theory to overcome ambiguities in selecting suppliers.

关键词： green supplier best-worst method MULTIMOORA intuitionistic fuzzy

An Animated GIF Steganography Using Variable Block Partition Scheme

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Computer Systems Science & Engineering 2022年第12期43卷 897-914页

作者： Maram Abdullah M.Alyahya Arshiya S.Ansari Mohammad Sajid mohammadi Department of Information Technology College of Computer and Information SciencesMajmaah UniversityAl-Majmaah11952Saudi Arabia Department of Information Technology College of ComputerQassim UniversityBuraydah51452Saudi Arabia

The paper presents a novel Graphics Interchange Format (GIF) Steganography system. The algorithm uses an animated (GIF) file format video to applyon, a secured and variable image partition scheme for data embedding. The secretdata could be any character text, any image, an audio file, or a video file;that isconverted in the form of bits. The proposed method uses a variable partitionscheme structure for data embedding in the (GIF) file format video. The algorithmestimates the capacity of the cover (GIF) image frames to embed data bits. Ourmethod built variable partition blocks in an empty frame separately and incorporate it with randomly selected (GIF) frames. This way the (GIF) frame is dividedinto variable block same as in the empty frame. Then algorithm embeds secretdata on appropriate pixel of the (GIF) frame. Each selected partition block for dataembedding, can store a different number of data bits based on block size. Intruders could never come to know exact position of the secrete data in this stegoframe. All the (GIF) frames are rebuild to make animated stego (GIF) *** performance of the proposed (GIF) algorithm has experimented andevaluated based on different input parameters, like Mean Square Error (MSE)and Peak Signal-to-Noise Ratio (PSNR) values. The results are compared withsome existing methods and found that our method has promising results.

关键词： (GIF)Steganography frame partition variable data insertion data encapsulation

The effect of climate factors on the size of forest wildfires(case study:Prague-East district,Czech Republic)

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Journal of Forestry Research 2022年第4期33卷 1291-1300页

作者： Zohreh mohammadi Peter Lohmander Jan Kašpar Roman Berčák Jaroslav Holuša Robert Marušák Faculty of Forestry and Wood Sciences Czech University of Life Sciences PragueKamýcká12916500 Praha-SuchdolCzech Republic Optimal Solutions in Cooperation with Linnaeus University UmeaSweden

This paper presents a new approach to identifying the climate variables that influence the size of the area burned by forest *** linear regression was used in combination with nonlinear variable transformations to determine relevant nonlinear forest wildfire size *** from the Prague-East District of the Czech Republic was used for model *** burned forest area was hypothesized as a function of water vapor pressure,air temperature and wind *** speed was added to enhance predictions of the size of forest wildfires,and further improvements to the utility of prediction methods were added to the regression *** results show that if the air temperature increases,it may contain less water and the fuel will become *** size of the burned area then *** the relative humidity in the air increases and the wind speed decreases,the size of the burned area is *** model suggests that changes in the climate factors caused by ongoing climate change could cause significant changes in the size of wildfire in forests.

关键词： Climatic variables Burned forest area Climate change Multiple linear regression