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Improvement of Surface mechanical and Tribological Characteristics of L-PBF Processed Commercially Pure Titanium through Ultrasonic Impact Treatment

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Acta metallurgica Sinica(English Letters) 2024年第6期37卷 1034-1046页

作者： Iman Ansarian Reza Taghiabadi Saeid Amini mohammad hossein mosallanejad Luca Iuliano Abdollah Saboori Department of materials Science and metallurgy Imam Khomeini International University(IKIU)QazvinIran Department of mechanical Engineering University of KashanKashanIran Integrated Additive manufacturing Center Department of Management and Production EngineeringPolitecnico di TorinoCorso Duca Degli Abruzzi 2410129TurinItaly

multi-pass ultrasonic impact treatment(UIT)was applied to modify the microstructure and improve the mechanical and tribological characteristics at the near-surface region of commercially pure Ti(CP-Ti)specimens produced by the laser powder bed fusion(L-PBF)*** considerably refined the L-PBF process-related acicular martensites(α′-m)and produced a well-homogenized and dense surface microstructure,where the porosity content of 1-,3-,and 5-pass UITed samples was reduced by 43,60,and 67%,*** UITed samples showed an enhancement in their near-surface mechanical properties up to a depth of about 300μ*** nanoindentation results for the 3-pass UITed sample revealed an increase of about 53,45,and 220%in its nanohardness,H/E_(r),and H_(3)/E_(r)^(2)indices,*** stylus profilometry results showed that performing the UIT removed the L-PBF-related features/defects and offered a smooth *** roughness average(R_(a))and the skewness(R_(sk))of the 3-pass UITed sample were found to be lower than those of the L-PBFed sample by 95 and 223%,*** the UIT also enhanced the material ratio,where the maximum load-bearing capacity(~100%)in as-L-PBFed(as-built)and 3-pass UITed samples was obtained at 60-and 10-µm depths,*** tribological investigations showed that applying the UIT resulted in a significant reduction of wear rate and average coefficient of friction(COF)of *** instance,under the normal pressures of 0.05 and 0.2 mPa,the wear rate and COF of the 3-pass UITed sample were lower than those of the L-PBFed sample by 65 and 58%,and 20 and 17%,respectively.

关键词： Laser powder bed fusion Ultrasonic impact treatment Commercially pure Ti(CP-Ti) Surface mechanical properties Tribological properties

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Efficiency improvement by using metal–insulator‑semiconductor structure in InGaN/GaN micro‑light‑emitting diodes

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Frontiers of Optoelectronics 2024年第1期17卷 77-84页

作者： Jian Yin David Hwang hossein Zamani Siboni ehsanollah Fathi Reza Chaji Dayan Ban Department of Electrical and Computer Engineering Waterloo Institute NanotechnologyUniversity of WaterlooWaterlooON N2L 3G1Canada Vuereal InC. 440 Philip StreetUnit 100WaterlooON N2L 5R9Canada

InGaN/GaN micro-light-emitting diodes(micro-LEDs)with a metal–insulator-semiconductor(mIS)structure on the sidewall are proposed to improve *** this mIS structure,a sidewall electrode is deposited on the insulating layer-coated sidewall of the device mesa between a cathode on the bottom and an anode on the ***(EL)measurements of fabricated devices with a mesa diameter of 10μm show that the application of negative biases on the sidewall electrode can increase the device external quantum efficiency(EQE).In contrast,the application of positive biases can decrease the *** band structure analysis reveals that the EQE is impacted because the application of sidewall electric fields manipulates the local surface electron density along the mesa sidewall and thus controls surface Shockley–Read–Hall(SRH)*** suggested strategies,reducing insulator layer thickness and exploring alternative materials,can be implemented to further improve the EQE of mIS micro-LEDs in future fabrication.

关键词： micro-LED GaN EQE improvement micro-fabrication

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Exogenous application of bio-stimulants and growth retardants improve nutrient absorption and fiber quality in upland cotton

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Journal of Cotton Research 2024年第2期7卷 137-147页

作者： Al-Khayri Jameel m. Arif muhammad Kareem Shadia Hama Salih Anwar Adeel Dehghanisanij hossein Emami Somayeh Yasmeen Azra Aftab Komal Negm mohamed Department of Agricultural Biotechnology College of Agriculture and Food SciencesKing Faisal University31982 Al‑AhsaSaudi Arabia Water Resources Zone Irrigation Department PunjabD.G.KhanPakistan Department of Biotechnology and Crop Science College of Agricultural Engineering SciencesUniversity of SulaimaniSulaimaniIraq Department of Agronomy PMAS-Arid Agriculture UniversityRawalpindiPakistan Agricultural Research Education and Extension OrganizationAgricultural Engineering Research InstituteKarajAlborzIran Department of Water Engineering University of TabrizTabrizIran Department of Agronomy Bahauddin Zakariya UniversityMultanPakistan Department of Plant Breeding and Genetics Bahauddin Zakariya UniversityMultanPakistan Agricultural Research Center Cotton Research InstituteGiza 12619Egypt

Background Natural and synthetic plant growth regulators are essential for plant health,likewise these regulators also play a role in increasing organic production productivity and improving quality and yield *** the present study,we have evaluated the effects of foliar applied plant growth regulators,i.e.,moringa leaf extract(mLE)and mepiquat chloride(mC)alone and in combination mC and mLE on the conventional cotton cultivar(CIm 573)and transgenic one(CIm 598).The growth regulators were applied at the start of bloom,45 and 90 days after *** The application of mC and mLE at 90 days after blooming significantly improved the relative growth rate,net assimilation rate,the number of bolls per plant,and seed cotton ***,the combined application of mLE and mC at 90 days after blooming significantly boosted the nitrogen uptake in locules,as well as the phosphorus and potassium uptake in the leaves of both cotton *** application of mLE alone has considerably improved the nitrogen uptake in leaves,and phosphorus and potassium contents in locules of Bt and conventional cotton ***,Bt cotton treated with mLE at 90 days after blooming produced significantly higher ginning out turn and oil *** in combination(mLE+mC)at 90 days after blooming produced considerably higher micronaire value,fiber strength,and staple length in conventional *** The natural growth enhancer,mLE is a rich source of minerals and zeatin,improving the nutrient absorption and quality of cotton fiber in both conventional and Bt cotton cultivars.

关键词： Bio-stimulant Cotton Fiber quality mepiquat chloride moringa leaf extract Potassium accumulation Oil contents

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Structural and Optical Characteristics of Silica Nanotubes Using CNTs as Template

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Nano-micro Letters 2010年第4期2卷 268-271页

作者： Rasoul malekfar m.Hassan Rajabi m.hossein majless Ara Physics Department Faculty of Basic SciencesTarbiat Modares University Department of Physics Faculty of Basic SciencesMember of Young Researches ClubIslamic Azad University Department of Physics Faculty of Basic SciencesTarbiat Moallem University

Silica coated multi-wall carbon nanotubes(mWCNTs),silica@mWCNTs and nanocomposites were synthesized by a sol-gel *** using the synthesized nanocomposites and also CNTs as templates,silica nanotubes(silica-NTs) were *** optical properties of fabricated nanocomposites and nanotubes were characterized by back-scattering micro Raman,UV/Vis/NIR and FT-IR spectra,which show the presence of CNTs structure in the ***/Vis/NIR and FT-IR spectra also show the presence of silica *** recorded spectra from UV/Vis/NIR and FT-IR also confirm the presence of silica compounds in the *** results of FE-SEm imaging data indicate that the synthesized samples are mWCNTs coated uniformly by silica molecules,which act as the template to synthesize silica-NTs.

关键词： Carbon nanotubes(mWCNTs) Silica Raman Ultra violet/visible/near infrared(UV/Vis/NIR)

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Comprehensive analysis of the role of ubiquitin-specific peptidases in colorectal cancer:A systematic review

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World Journal of Gastrointestinal Oncology 2024年第1期16卷 197-213页

作者： Eman Al-Balushi Amina Al marzouqi Shima Tavoosi Amir hossein Baghsheikhi Arash Sadri Leyla Sharifi Aliabadi mohammad-mahdi Salarabedi Syed Azizur Rahman Nabeel Al-Yateem Alireza mosavi Jarrahi Aram Halimi mohammad Ahmadvand Wael m Abdel-Rahman College of Health Sciences University of SharjahSharjah 27272United Arab Emirates Department of Biology Faculty of SciencesUniversity of IsfahanIsfahan 81746-73441Iran Department of Biology Science and Research BranchIslamic Azad UniversityTehran 11365/4435Iran Students’Scientific Research Center Tehran University of Medical SciencesTehran ***Iran Cell Therapy and Hematopoietic Stem Cell Transplantation Research Center Research Institute for OncologyHematologyand Cell TherapyTehran University of Medical SciencesTehran ***Iran Student Research Committee School of MedicineShahid Beheshti University of Medical SciencesTehran ***Iran Department of Nursing University of SharjahSharjah 27272United Arab Emirates Cancer Research Centre Shahid Beheshti University of Medical SciencesTehran ***Iran Department of medical Laboratory Sciences University of SharjahSharjah 27272United Arab Emirates

BACKGROUND Colorectal cancer(CRC)is the third most frequent and the second most fatal *** search for more effective drugs to treat this disease is ongoing.A better understanding of the mechanisms of CRC development and progression may reveal new therapeutic ***-specific peptidases(USPs),the largest group of the deubiquitinase protein family,have long been implicated in various *** have been numerous studies on the role of USPs in CRC;however,a comprehensive view of this role is *** To provide a systematic review of the studies investigating the roles and functions of USPs in *** We systematically queried the mEDLINE(via Pubmed),Scopus,and Web of Science *** Our study highlights the pivotal role of various USPs in several processes implicated in CRC:Regulation of the cell cycle,apoptosis,cancer stemness,epithelial–mesenchymal transition,metastasis,DNA repair,and drug *** findings of this study suggest that USPs have great potential as drug targets and noninvasive biomarkers in *** dysregulation of USPs in CRC contributes to drug resistance through multiple *** Targeting specific USPs involved in drug resistance pathways could provide a novel therapeutic strategy for overcoming resistance to current treatment regimens in CRC.

关键词： Ubiquitin-specific peptidases Colorectal cancer Deubiquitinase protein family Drug target discovery Biomarker discovery

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Haplotype-based phylogenetic analysis and population genomics uncover the origin and domestication of sweetpotato

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molecular Plant 2024年第2期17卷 277-296页

作者： mengxiao Yan ming Li Yunze Wang Xinyi Wang m.hossein m.einza.eh Dora G.Quispe-Huamanquispe Weijuan Fan Yijie Fang Yuqin Wang Haozhen Nie Zhangying Wang Aiko Tanaka Bettina Heider Jan F.Kreuze Godelieve Gheysen Hongxia Wang martin Vingron Ralph Bock Jun Yang Shanghai Key Laboratory of Plant Functional Genomics and Resources Shanghai Chenshan Botanical GardenShanghai 201602China College of Life Sciences Chongqing Normal UniversityChongqing 401331China Biotechnology and Nuclear Technology Research Institute Sichuan Academy of Agricultural SciencesChengdu 610061China College of Life Sciences Shanghai Normal UniversityShanghai 200234China Department of Computational molecular Biology Max Planck Institute for Molecular GeneticsIhnestraBe 63-7314195 BerlinGermany Department of Biotechnology Ghent University9000 GhentBelgium Guangdong Provincial Key Laboratory of Crops Genetics and Improvement Crop Research InstituteGuangdong Academy of Agricultural SciencesGuangzhou 510640China Graduate School of Bioagricultural Sciences Nagoya UniversityChikusaNagoya 464-8601Japan international Potato Center(CIP) LimaPeru CAS Center for Excellence of molecular Plant Sciences Institute of Plant Physiology and EcologyChinese Academy of SciencesShanghai 200233China max-Planck-Institut fur molekulare Pflanzenphysiologie Am Muhlenberg 114476 Potsdam-GolmGermany

The hexaploid sweetpotato(lpomoea batatas)is one of the most important root crops ***,its genetic origin remains controversial,and its domestication history remains *** this study,we used a range of genetic evidence and a newly developed haplotype-based phylogenetic analysis to identify two probable progenitors of *** diploid progenitor was likely closely related to lpomoea ae-quatoriensis and contributed the B,subgenome,IbT-DNA2,and the lineage 1 type of chloroplast genome to *** tetraploid progenitor of sweetpotato was most likely *** 4x,which donated the B2 subgenome,IbT-DNA1,and the lineage 2 type of chloroplast *** most likely originated from reciprocal crosses between the diploid and tetraploid progenitors,followed by a subsequent whole-genome *** addition,we detected biased gene exchanges between the subgenomes;the rate of B,to B2 subgenome conversions was nearly three times higher than that of B2 to B subgenome *** analyses revealed that genes involved in storage root formation,maintenance of genome stabil-ity,biotic resistance,sugar transport,and potassium uptake were selected during the speciation and domestication of *** study sheds light on the evolution of sweetpotato and paves the way forimprovementofthiscrop.

关键词： sweetpotato origin gene conversion domestication IbT-DNA HPA

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3D打印和电沉积多层超轻夹层板的力学性能和能量吸收性能

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Transactions of Nonferrous metals Society of China 2024年第1期34卷 255-264页

作者： mehrnoosh hosseinPOUR Salar ROHANI NEJAD Seyed mohammad hossein mIRBAGHERI Department of materials and metallurgical Engineering Amirkabir University of TechnologyHafez St.Tehran15875-4413Iran

研究由开孔聚合物和金属/聚合物泡沫芯制成的轻质夹层板的力学性能和能量吸收性能。通过结合聚合物树脂的增材制造和三层金属(Ni/Ni-Cu/Ni)的电沉积制备多层夹层板,每英寸孔数(PPI)为4、5和6。测试样品在单轴压缩变形过程中的屈服强度,... 详细信息

研究由开孔聚合物和金属/聚合物泡沫芯制成的轻质夹层板的力学性能和能量吸收性能。通过结合聚合物树脂的增材制造和三层金属(Ni/Ni-Cu/Ni)的电沉积制备多层夹层板,每英寸孔数(PPI)为4、5和6。测试样品在单轴压缩变形过程中的屈服强度,计算其能量吸收密度、互补能和比吸收能(SEA)。结果表明,与相同厚度的纯Ni和Cu夹层板相比,复合夹层板的性能有明显改善。增加PPI和金属层可提高力学性能和能量吸收性能,当PPI为6时,屈服强度(能量吸收密度)由聚合物夹层板的0.12 mPa(0.12mJ/m^(3))提高到三层金属夹层板的1.83mPa(0.67 mJ/m^(3))。对夹层板结构归一化能量的研究表明,夹层板具有可预测的塑性变形行为,多金属层改善了新型夹层板的力学性能。其能量吸收性能的显著增强可保证材料在不同行业的独特应用。

关键词：夹层板能量吸收金属泡沫 Voronoi结构增材制造金属电层级

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BSN:Photometric Light Curve Analysis of Two Contact Binary Systems LS Del and V997 Cyg

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Research in Astronomy and Astrophysics 2024年第4期24卷 192-213页

作者： Atila Poro mehmet Tanriver Elham Sarvari Shayan Zavvarei hossein Azarara Laurent Corp Sabrina Baudart Asma Ababafi Nazanin Kahali Poor Fariba Zare Ahmet Bulut Ahmet Keskin Astronomy Department of the Raderon AI Lab. BurnabyBC.Canada Department of Astronomy and Space Science Faculty of ScienceErciyes UniversityKayseri TR-38039Turkiye Erciyes University Astronomy and Space Science Observatory Application and Research CenterKayseri TR-38039Turkiye Independent Astrophysics Researcher TehranIran Department of Physics Shahid Beheshti UniversityTehranIran Faculty of Physics Shahid Bahonar University of KermanP.O.Box 76175KermanIran Double Stars Committee SociétéAstronomique de FranceParisFrance Dez Astronomical Association Khouzestan ProvinceDezfulIran Department of Physics Amirkabir University of TechnologyTehranIran Department of Physics Faculty of SciencesCanakkale Onsekiz Mart UniversityTerzioglu KampusuTR-17020CanakkaleTurkiye Astrophysics Research Center and Observatory Canakkale Onsekiz Mart UniversityTerzioğlu KampusuTR-17020CanakkaleTürkiye

The light curve analyses and orbital period variations for two contact binary stars,LS Del and V997 Cyg,are presented in this work which was conducted in the frame of the Binary Systems of South and North project Ground-based photometric observations were performed at two observatories in *** used the Transiting Exoplanet Survey Satellite(TESS)data for extracting times of minima and light curve analysis of the targe *** O-C diagram for both systems displays a parabolic *** Del and V997 Cyg’s orbital periods are increasing at rates of dP/dt=7.20×10^(-08)days yr^(-1)and dP/dt=2.54×10^(-08)days yr^(-1),respectively Therefore,it can be concluded that mass is being transferred from the less massive star to the more massive component with a rate of dm/dt=-1.96×10^(-7)m_(⊙)yr^(-1)for the LS Del system,and dm/dt=-3.83×10^(-7)m_(⊙)yr-1for V997 *** parameters of a third possible object in the system are also *** PHysics Of Eclipsing BinariEs Python code was used to analyze the light *** light curve solutions needed a cold starspot due to the asymmetry in the LS Del system’s light curve *** mass ratio fill-out factor,and star temperature all indicate that both systems are contact binary types in this *** methods were applied to estimate the absolute parameters of the systems:one method relied on the parallax of Gaia DR3,and the other used a P-m *** positions of the systems are also depicted on the m-L,m-R q-L_(ratio),and logm_(tot)-logJ_(0)*** recommend that further observations and investigations be done on the existence of a fourth body in this system.

关键词： (stars:)binaries:eclipsing methods:observational stars:individual(LS Del and V997 Cyg)

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Radial Basis Function Interpolation and Galerkin Projection for Direct Trajectory Optimization and Costate Estimation

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IEEE/CAA Journal of Automatica Sinica 2021年第8期8卷 1380-1388页

作者： hossein mirinejad Tamer Inanc Jacek m.Zurada College of Aeronautics and Engineering Kent State UniversityKentOH 44242 USA Department of Electrical and Computer Engineering University of LouisvilleLouisvilleKY 40292 USA Louisville LouisvilleKY 40292 USAand also with the Information Technology InstituteUniversity of Social Science90-113ŁódźPoland

This work presents a novel approach combining radial basis function(RBF)interpolation with Galerkin projection to efficiently solve general optimal control *** goal is to develop a highly flexible solution to optimal control problems,especially nonsmooth problems involving discontinuities,while accounting for trajectory accuracy and computational efficiency *** proposed solution,called the RBF-Galerkin method,offers a highly flexible framework for direct transcription by using any interpolant functions from the broad class of global RBFs and any arbitrary discretization points that do not necessarily need to be on a mesh of *** RBF-Galerkin costate mapping theorem is developed that describes an exact equivalency between the Karush-Kuhn-Tucker(KKT)conditions of the nonlinear programming problem resulted from the RBF-Galerkin method and the discretized form of the first-order necessary conditions of the optimal control problem,if a set of discrete conditions *** efficacy of the proposed method along with the accuracy of the RBF-Galerkin costate mapping theorem is confirmed against an analytical solution for a bang-bang optimal control *** addition,the proposed approach is compared against both local and global polynomial methods for a robot motion planning problem to verify its accuracy and computational efficiency.

关键词： Costate estimation direct trajectory optimization Galerkin projection numerical optimal control radial basis function interpolation

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CFD modeling of a spouted bed with a porous draft tube

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Particuology 2010年第5期8卷 415-424页

作者： Salar Azizi Seyyed hossein hosseini m.moraveji Goodarz Ahmadi Chemical Engineering Department Faculty of EngineeringArak University Department of Chemical Engineering Faculty of EngineeringIlam University Department of mechanical and Aeronautical Engineering Clarkson University

Spouted bed with a porous draft tube is used for drying of grains and chemical products and thermal disinfestations process. This work provides a computational fluid dynamics （CFD） simulation of binary mixtures of glass particles in a spouted bed with a porous draft tube. The simulation used the multi-fluid Eulerian-Eulerian approach based on kinetic theory of granular flows, incorporating a kinetic-frictional constitutive model for dense assemblies of particulate solids and Gidaspow＇s drag model for the interaction between gas and particles. Influences of solids mass fraction and inlet gas flow rate on pressure distribution, gas and particle velocities were studied. The modeling results were compared with the exper- imental work of Ishikura, Nagashima, and Ide （2003） for the flow condition along the axis of the spouted bed. Good agreement between the modeling results and experimental data was observed.

关键词： Spouted bedPorous dra tubehydrodynamicsKinetictheoryCFD

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