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Temperature distribution effects on buckling behavior of smart heterogeneous nanosize plates based on nonlocal four-variable refined plate theory

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International Journal of Smart and Nano Materials 2016年第3期7卷 119-143页

作者： Farzad Ebrahimi mohammad Reza barati Department of Mechanical Engineering Faculty of EngineeringImam Khomeini International UniversityQazvinIran

This work presents a theoretical study for thermo-mechanical buckling of size-dependent magneto-electro-thermo-elastic func-tionally graded(METE-FG)nanoplates in thermal environments based on a refined trigonometric plate *** field has uniform,linear,and nonlinear distributions across the *** thermal loadings are considered as heat conduc-tion(HC)and sinusoidal temperature rise(STR).A power law function is applied to govern the gradation of material properties through the nanoplate *** coupling impacts between magneto,electro,thermo-mechanical loadings,the equa-tions of motion,and distribution of magneto-electrical field across the thickness direction of the METE-FG nanoplate are *** exact solutions for critical buckling temperatures of METE-FG nanoplates are introduced implementing Navier’s ***,the accuracy of the present formulation is examined by comparing the obtained results with published ***,the effects played by the magneto-electrical field,various temperature rises,nonlocality,power law index,side-to-thickness ratio,and aspect ratio on the critical buckling tempera-ture response are all investigated and reported.

关键词： METE-FG nanoplate thermal buckling four-variable refined plate theory nonlocal elasticity

Electromechanical buckling behavior of smart piezoelectrically actuated higher-order size-dependent graded nanoscale beams in thermal environment

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International Journal of Smart and Nano Materials 2016年第2期7卷 69-90页

作者： Farzad Ebrahimi mohammad Reza barati Department of Mechanical Engineering Faculty of EngineeringImam Khomeini International UniversityQazvinI.R.Iran

In the present work,thermo-electro-mechanical buckling behavior of functionally graded piezoelectric(FGP)nanobeams is investi-gated based on higher-order shear deformation beam *** FGP nanobeam is subjected to four types of thermal loading including uniform,linear,and sinusoidal temperature rise as well as heat conduction through the beam ***-electro-mechanical properties of FGP nanobeam are supposed to change continuously in the thickness direction based on power-law *** consider the influences of small-scale sizes,Eringen’s nonlocal elasticity theory is *** Hamilton’s princi-ple,the nonlocal governing equations of an FGP nanobeam in thermal environments are obtained and are solved using Navier-type analytical *** significance of various parameters,such as thermal loadings,external electric voltage,power-law index,nonlocal parameter,and slenderness ratio on thermal buck-ling response of size-dependent FGP nanobeams is investigated.

关键词： Functionally graded piezoelectric nanobeam thermal buckling nonlocal elasticity theory higher-order beam theory

Spatial outline of malaria transmission in Iran

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Asian Pacific Journal of Tropical Medicine 2012年第10期5卷 789-795页

作者： mohammad barati Hossein Keshavarz-valian Majid Habibi-nokhandan Ahmad Raeisi Leyla Faraji Abdoreza Salahi-moghaddam Department of Medical Parasitology and Mycology Tehran University of Medical Sciences(TUMS)Iran Climatological Research Institute MashhadIran Malaria Control Program Center for Diseases Management and Control(CDMC)TehranIran Malaria Control Program Center for Disrases Management and Control(CDMC)TehranIran Dept.of Pathobiology Hormozgan University of Medical Sciemces(HUMS).Bandar AbbasIran

Objective:To conduct for modeling spatial distribution of malaria transmission in Iran. Methods:Records of all malaria cases from the period 2008-2010 in Iran were retrieved for malaria control ***&*** data including annual rainfall,maximum and minimum temperature,relative humidity,altitude,demographic,districts border shapefiles. and NDVI images received from Iranian Climalologic Research *** arranged in ArcCIS. Results:Results:99.65%of malaria transmission cases were focused in southeast part of Iran. These transmissions had statistically correlation with altitude(650 m),maximum(30℃),minimum (20℃) and average temperature(25.3℃).Statistical correlation and overall relationship between NDVI(118.81),relative humidity(≥45%) and rainfall in southeast area was defined and explained in this ***:According to ecological condition and mentioned cut-off points, predictive map was generated using rokriging method.

关键词： Malaria Iran GIS MEWS Epidemiology Mapping

Synthesis and Crystal Structure of 2-(4-Chlorophenyl)-1,4,5-triphenyl-1H-imidazole

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Chinese Journal of Structural Chemistry 2012年第4期31卷 574-576页

作者： Ali mohammad Amani Kazem barati Young Researchers Club Shiraz BranchIslamic Azad University Young Researchers Club Yasooj BranchIslamic Azad University

The compound 2-（4-chlorophenyl）-1,4,5-triphenyl-1H-imidazole（1,C27H19ClN2） has been synthesized and its crystal structure was determined by single-crystal X-ray *** crystal of 1 belongs to the triclinic system,space group P with a = 10.3350（19）,b = 10.238（2）,c = 11.201（2） ,α = 85.957（16）,β = 83.148（15）,γ = 66.467（15）°,V = 1078.5（4） 3,Mr = 406.89,Z = 2,F（000） = 422,Dc = 1.257 g/cm3,μ = 0.193 mm-1,T = 298（2） K,S = 1.092,R = 0.0702 and wR = *** imidazole ring system is planar and makes a dihedral angle of 40.3° with the chlorobenzene ring.

关键词： crystal structure imidazole triclinic system

Carpet Cloak Design for Rough Surfaces

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Chinese Physics Letters 2017年第8期34卷 46-50页

作者： mohammad Hosein Fakheri Hooman barati Ali Abdolali Applied Electromagnetic Laboratory School of Electrical Engineering Iran University of Science and Technology Tehran *** Iran

Conventional carpet cloak structures have been utilized to conceal the objects located on a planar perfect electric conductor surface. We systematically investigate hiding arbitrarily shaped objects on a rough surface, as a more general and practical scenario. In addition, the required cloak is designed considering different boundary conditions for the surface beneath the object, despite the previous studies. To achieve an invisibility cloak, taking advantage of linear coordinate transformation, a simple homogeneous material is obtained to realize the cloak structure, facilitating the fabrication processes. Numerical simulations validate the performance of the proposed cloaking method. Therefore, the proposed structure is capable of cloaking in more general and complicated scenarios.

关键词： Carpet Cloak Design for Rough Surfaces

Evaluation of the Relationship between Blocking Patterns and Duration of Spring Frost Waves:The Case of Iran

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Journal of Meteorological Research 2020年第3期34卷 586-600页

作者： Farzaneh JAFARI HOMBARI Gholamreaza barati mohammad MORADI Department of Physical Geography Faculty of Earth SciencesUniversity of Shahid BeheshtiTehran ***Iran Iran Meteorological Organization Tehran ***Iran

In order to evaluate the effects of blocking patterns on the duration of frost waves across Iran,the minimum daily temperatures of 60 weather stations were collected from 20 March 1968 to 21 June *** findings,which were obtained based on the distribution tables of reported temperatures and their frequency variation graphs,resulted in identifying 114 frost *** obtained the daily weather maps at 500 hPa from NCEP/NCAR during the peak days of durable frosts,and it was revealed that the formation of low pressures over 20°-70°E and the dominant southwest-northeast troughs at 500 hPa facilitated the influx of cold air from both eastern Europe and central Siberia toward Iran,leading to the average frost duration of 12.4 ***,low-pressure centers appeared in a dipole pattern in northern Iran over Caspian Sea and created durable frosts with an average duration of 15.4 *** effect of omega shaped pattern of the geopotential height on durable frosts demonstrated a sharp difference with two recent patterns leading to the frost occurrence with a 13.3-day duration ***,the slow speed of cold western currents in the rex type of blocking from 30°to 50°N caused durable frosts of 14.3 ***,we found a specific reduction in the frequency of blocking patterns,which has occurred in the past four ***,the blocking and non-blocking patterns cause long-and short-duration frosts over Iran,respectively.

关键词： blocking patterns durable frosts spring season Iran

Secure Channel Estimation Using Norm Estimation Model for 5G Next Generation Wireless Networks

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Computers, Materials & Continua 2025年第1期82卷 1151-1169页

作者： Khalil Ullah Song Jian Muhammad Naeem Ul Hassan Suliman Khan mohammad Babar Arshad Ahmad Shafiq Ahmad Faculty of Information Engineering and Automation Kunming University of Science and TechnologyKunming650500China Department of Computer Science Abbottabad University of Science and TechnologyHavelianAbbottabad22500Pakistan Department of Computing and Electronics Engineering Middle East CollegeMuscat124Oman Department of CS&IT Pak-Austria Fachhochschule Institute of Applied Sciences and Technology MangHaripur22621Pakistan Industrial Engineering Department College of EngineeringKing Saud UniversityRiyadh11421Saudi Arabia

The emergence of next generation networks(NextG),including 5G and beyond,is reshaping the technological landscape of cellular and mobile *** networks are sufficiently scaled to interconnect billions of users and *** in academia and industry are focusing on technological advancements to achieve highspeed transmission,cell planning,and latency reduction to facilitate emerging applications such as virtual reality,the metaverse,smart cities,smart health,and autonomous *** continuously improves its network functionality to support these *** input multiple output(MIMO)technology offers spectral efficiency,dependability,and overall performance in *** article proposes a secure channel estimation technique in MIMO topology using a norm-estimation model to provide comprehensive insights into protecting NextG network components against adversarial *** technique aims to create long-lasting and secure NextG networks using this extended *** viability of MIMO applications and modern AI-driven methodologies to combat cybersecurity threats are explored in this ***,the proposed model demonstrates high performance in terms of reliability and accuracy,with a 20%reduction in the MalOut-RealOut-Diff metric compared to existing state-of-the-art techniques.

关键词： Next generation networks massive mimo communication network artificial intelligence 5G adversarial attacks channel estimation information security

Risk factors for congenital nasolacrimal duct obstruction in children under two years of age

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国际眼科杂志 2025年第1期25卷 17-23页

作者： Rozhin Kasiri Gholamreza Khataminia Ali Kasiri mohammad Sadegh Mirdehghan mohammad Armin Kasiri Infectious Ophthalmologic Research Center Ahvaz Jundishapur University of Medical SciencesAhvaz ***Iran Islamic Azad University Tehran Medical Sciences Tehran ***Iran

·AIM:To identify various risk factors that may play a significant role in the development of congenital nasolacrimal duct obstruction(CNLDO).·METHODS:This observational case-control study included a case group of 122 children less than two years of age with CNLDO who underwent probing and irrigation treatment at the ophthalmology department of Imam Khomeini Hospital in Ahvaz,Iran,from June 2022 to June2024.A control group of 122 age-matched children without CNLDO was also included for *** was collected from the children's medical records.·RESULTS:The study found a significant correlation between the occurrence of CNLDO and several maternal factors,such as preeclampsia,the use of levothyroxine,hypothyroidism,having more than three pregnancies(gravidity>3),natural pregnancy,and gestational diabetes ***,in children,factors,such as oxygen therapy,anemia,reflux,jaundice,and a family history of CNLDO in first-degree relatives were associated with CNLDO,and maternal preeclampsia and hypothyroidism were found to significantly increase the risk of developing CNLDO in children.·CONCLUSION:Given that CNLDO affects both premature and full-term children,the present findings may potentially facilitate the early identification of children and infants at risk of nasolacrimal duct obstruction,thereby preventing the onset of chronic dacryocystitis.

关键词： risk factors congenital nasolacrimal duct obstruction children

Decoding molecular mechanisms:brain aging and Alzheimer's disease

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Neural Regeneration Research 2025年第8期20卷 2279-2299页

作者： Mahnoor Hayat Rafay Ali Syed Hammad Qaiser mohammad Uzair Khalid Al-Regaiey Roaa Khallaf Lubna Abdullah Mohammed Albassam Imdad Kaleem Xueyi Wang Ran Wang Mehwish SBhatti Shahid Bashir Atta-ur-Rahman School of Applied Biosciences(ASAB) National University of Sciences and Technology(NUST)IslamabadPakistan Department of Biotechnology Quaid-i-Azam UniversityIslamabadPakistan Department of Biological Sciences Faculty of Basic&Applied SciencesInternational Islamic University Islamabad(IIUI)IslamabadPakistan Department of Bioengineering King Fahd University of Petroleum and MineralsDhahranSaudi Arabia Department of Physiology College of MedicineKing Saud UniversityRiyadhSaudi Arabia Department of Neurology Neuroscience CenterKing Fahad Specialist HospitalDammamSaudi Arabia Department of Mental Health Neuroscience CenterKing Fahad Specialist HospitalDammamSaudi Arabia Department of Biosciences Commission on Science and Technology for Sustainable Development in the South(COMSATS University)IslamabadPakistan Department of Psychiatry The First Hospital of Hebei Medical UniversityShijiazhuangHebei ProvinceChina Mental Health Institute of Hebei Medical University ShijiazhuangHebei ProvinceChina Department of Neurobiology and Behavior University of CaliforniaIrvineCAUSA Neuroscience Center King Fahad Specialist Hospital DammamDammamSaudi Arabia

The complex morphological,anatomical,physiological,and chemical mechanisms within the aging brain have been the hot topic of research for *** aging process alters the brain structure that affects functions and cognitions,but the worsening of such processes contributes to the pathogenesis of neurodegenerative disorders,such as Alzheimer's *** these observable,mild morphological shifts,significant functional modifications in neurotransmission and neuronal activity critically influence the aging *** these changes is important for maintaining cognitive health,especially given the increasing prevalence of age-related conditions that affect *** review aims to explore the age-induced changes in brain plasticity and molecular processes,differentiating normal aging from the pathogenesis of Alzheimer's disease,thereby providing insights into predicting the risk of dementia,particularly Alzheimer's disease.

关键词： Alzheimer’s disease brain aging cognitive health dementia molecular mechanisms neuronal activity neuroplasticity neurotransmission