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Improvement of the microstructural features and mechanical properties of advanced high-strength steel DP590 welds

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International Journal of Minerals,Metallurgy and Materials 2021年第6期28卷 1022-1029页

作者： Arian Ghandi Morteza Shamanian Mohamad Reza Salmani jalal Kangazian College of Pardis Materials Engineering SectionIsfahan University of TechnologyIsfahan 84156-83111Iran Department of Materials Engineering Isfahan University of TechnologyIsfahan 84156-83111Iran Engineering&Quality of Auto Steel Division SAIPA GroupTehranIran

The effects of the welding current mode in resistance spot welding on the microstructure and mechanical properties of advanced high-strength steel dual-phase 590(DP590)sheets were *** showed that a rough martensitic structure was formed in the weld zone of the sample welded via the single-pulsed mode,whereas the microstructure in the heat-affected zone consisted of a very rough martensitic microstructure and rough ***,using the secondary pulse mode led to the formation of tempered martensite in the weld *** maximum load and the energy absorption to failure of the samples with the secondary pulsed cycle were higher than those of the samples with the single-pulsed *** shear results indicated that the secondary pulsed mode could significantly change the mode of failure upon shear tension ***,the obtained results suggest that the use of secondary pulsed mode can improve the microstructural feature and mechanical properties of advanced high-strength steel DP590 welds.

关键词： advanced high-strength steel resistance spot welding microstructure mechanical properties

Local vs. cross station simulation of suspended sediment load in successive hydrometric stations: heuristic modeling approach

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Journal of Mountain Science 2016年第10期13卷 1773-1788页

作者： Kiyoumars ROUSHANGAR Shabnam HOSSEINZADEH jalal SHIRI Department of Civil Hydraulics Engineering Faulty of Civil Engineering University of Tabriz Department of Water Engineering Faculty of Agriculture University of Tabriz

The present paper aims at modeling suspended sediment load(SSL) using heuristic data driven methodologies, e.g. Gene Expression Programming(GEP) and Support Vector Machine(SVM) in three successive hydrometric stations of Housatonic River in U.S. The simulations were carried out through local and cross-station data management scenarios to investigate the interrelations between the SSL values of upstream/downstream stations. The available scenarios were applied to predict SSL values using GEP to obtain the best models. Then, the best models were predicted by SVM approach and the obtained results were compared with those of GEP. The comparison of the results revealed that the SVM technique is more capable than the GEP for modeling the SSL through the both local and cross-station data management strategies. Besides, local application seems to be better than cross-station application for modeling SSL. Nevertheless, the cross-station application demonstrated to be a valid methodology for simulating SSL, which would be of interest for the stations with lack of observational data. Also, the prediction capability of conventional Sediment Rating Curve(SRC) method was compared with those of GEPand SVM techniques. The obtained results revealed the superiority of GEP and SVM-based models over the traditional SRC technique in the studied stations.

关键词： Suspended sediment load Successive hydrometric stations Gene expression programming Support vector machine

CuO–CeO_2 nanocomposite: A highly efficient recyclable catalyst for the multicomponent synthesis of 4H-benzo[b]pyran derivatives

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Chinese Chemical Letters 2013年第9期24卷 821-824页

作者： jalal Albadi Azam Mansournezhad Zahra Derakhshandeh College of Science Behbahan Khatam Alanbia University of Technology Department of Chemistry Gachsaran Branch Islamic Azad University Department of Chemistry Omidieh Branch Islamic Azad University

CoO-CeO2 is reported as a highly efficient and green recyclable catalyst, for the multicomponent synthesis of 4H-benzo[b]pyran derivatives. The catalyst was synthesized by a co-precipitation method and characterized by XRD, BET specific surface area, ESEM and EDS analysis. This synthetic method provides several advantages such as simple work-up procedures, minimal amount of waste generated, short reaction time, and high yields of products.

关键词： CuO-CeO2 nanocomposite 4H-Benzo[b]pyran 3-Methyl-l-phenyl-2-pyrazoline-5-oneAldehydeMalononitrile

Engineering hierarchical heterostructure material based on metal-organic frameworks and cotton fiber for high-efficient microwave absorber

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Nano Research 2022年第8期15卷 6841-6850页

作者： Yan Guo Hu Liu Dedong Wang Zeinhom M.El-Bahy jalal T.Althakafy Hala M.Abo-Dief Zhanhu Guo Ben Bin Xu Chuntai Liu Changyu Shen Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationNational Engineering Research Center for Advanced Polymer Processing TechnologyZhengzhou UniversityZhengzhou 450002China Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr City 11884CairoEgypt Department of Chemistry Faculty of Applied ScienceUmm Al-Qura UniversityMecca 21955Saudi Arabia Department of Chemistry College of ScienceTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Integrated Composites Laboratory(ICL) Department of Chemical&Biomolecular EngineeringUniversity of TennesseeKnoxvilleTN 37996USA Department of Mechanical and Construction Engineering Faculty of Engineering and EnvironmentNorthumbria UniversityNewcastle upon TyneNE18STUK

Rational construction of hierarchical multi-component materials with abundant heterostructure is evolving as a promising strategy to achieve excellent metal-organic frameworks(MOFs)based electromagnetic wave(EMW)***,hierarchical heterostructure WS_(2)/CoS_(2)@carbonized cotton fiber(CCF)was fabricated using the ZIF-67 MOFs nanosheets anchored cotton fiber(ZIF-67@CF)as a precursor through the tungsten etching,sulfurization,and carbonization *** from the synergetic effect of dielectric-magnetic dual-loss mechanism,the hierarchical heterostructure and multicomponent of WS_(2)/CoS_(2)@CCF also display improved impedance ***,numerous W-S-Co bands and heterojunction interfaces of heterogeneous WS_(2)/CoS_(2)are beneficial to promoting additional interfacial/dipole polarization loss and conductive loss,thereby enhancing the EMW attenuation *** on the percolation theory,a good balance between impedance matching and EMW absorption capacity was achieved for the WS_(2)/CoS_(2)@CCF/paraffin composite with 20 wt.%filler loading,exhibiting strong EMW absorption capability with a minimum reflection loss(RLmin)value of−51.26 dB at 17.36 GHz with 2 mm thickness and a maximum effective absorption bandwidth(EABmax)as wide as 6.72 *** research will provide new guidance for designing high-efficient MOFs derived EMW absorbers.

关键词： hierarchical heterostructure sulfurization metal-organic framework microwave absorber

Regioselective iodination of aromatic compounds with potassium iodide in the presence of benzyltriphenylphosphonium perchlorate

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Chinese Chemical Letters 2012年第3期23卷 261-264页

作者： jalal Albadi Masoumeh Abedini Nasir Iravani Young Research Club Gachsaran branchIslamic Azad UniversityGachsaranIran Department of Chemistry College of ScienceUniversity of GuilanRashtIran

A simple and efficient method for the selective iodination of various aromatic compounds by using potassium iodide in the presence of benzyltnphenylphosphonium perchlorate,is *** method provides several advantages suc... 详细信息

关键词： Benzyl triphenylphosphonium perchlorate lodination Aromatic compound Potassium iodide

From basic researches to new achievements in therapeutic strategies of KRAS-driven cancers

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Cancer Biology & Medicine 2019年第3期16卷 435-461页

作者： Mahsa Saliani Razieh jalal Mohammad Reza Ahmadian Department of Chemistry Faculty of ScienceFerdowsi University of MashhadMashhad***Iran Department ofResearch Cell and Molecular Biology Institute of BiotechnologyFerdowsi University of MashhadMashhad***Iran Institute of Biochemistry and Molecular Biology II Medical FacultyHeinrich-Heine UniversityDüsseldorf40225Germany

Among the numerous oncogenes involved in human cancers, KRAS represents the most studied and best characterized cancerrelated *** therapeutic strategies targeting oncogenic KRAS(KRASonc) signaling pathways have been suggested,including the inhibition of synthetic lethal interactions, direct inhibition of KRASonc itself, blockade of downstream KRASonc effectors, prevention of post-translational KRASonc modifications, inhibition of the induced stem cell-like program, targeting of metabolic peculiarities, stimulation of the immune system, inhibition of inflammation, blockade of upstream signaling pathways,targeted RNA replacement, and oncogene-induced *** intensive and continuous efforts, KRASonc remains an elusive target for cancer *** highlight the progress to date, this review covers a collection of studies on therapeutic strategies for KRAS published from 1995 to *** overview of the path of progress from earlier to more recent insights highlight novel opportunities for clinical development towards KRASonc-signaling targeted therapeutics.

关键词： Direct inhibition downstream effectors oncogenic KRAS drug target sites small GTPases signal transduction targeting synthetic,lethal interactions therapeutic strategies

Image analysis of Moroccan carob seeds(Ceratonia siliqua L.)revealed substantial intraspecific variations depending on climate and geographic origin

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Ecological Processes 2022年第1期11卷 455-468页

作者： jalal Kassout Younes Hmimsa Salama El Fatehi Abdeltif El Ouahrani Khalil Kadaoui Soufian Chakkour David Ariza‑Mateos Guillermo Palacios‑Rodríguez Rafael Navarro‑Cerrillo Mohammed Ater Laboratory of Applied Botany Bio‑Agrodiversity TeamFaculty of SciencesUniversity of Abdelmalek EssaadiTétouanMorocco Associated International Laboratory EVOLEA INEE‑CNRS‑CNRSTMontpellierFrance Polydisciplinary Faculty of Larache University of Abdelmalek EssaadiLaracheMorocco Forestry Engineering Department ERSAF Research Group RNM‑360University of CórdobaCórdobaSpain

Background:The carob tree(Ceratonia siliqua L.)is one of the most iconic tree species of the Mediterranean region,with valuable economic,ecological and cultural *** has been exploited around the Mediterranean region since antiquity and has been regarded as an important component of natural habitats and traditional *** studies have focused on its morphological,biochemical,and genetic ***,less is known about the intraspecific variation of seed *** this regard,and as an overall objective,we intend to evaluate the amplitude and the expression of intraspecific variations of carob seed traits at different ecological scales ranging from individual trees to different geographical *** addition,we investigated how the climate along the study area affects the extent of carob seed *** image analysis techniques,we measured seven traits related to the size and the shape of 1740 seeds collected from 18 populations of spontaneous *** distributed along a latitudinal transect in Morocco under different bioclimatic ***:The morphometric analysis of carob seed showed the effectiveness of adopted approach to highlight the amount and the amplitude of intraspecific variation according to geographic and climatic *** trait analysis revealed high intraspecific variability,explained by differences between and among carob populations and geographic *** area,perimeter,length,and width showed the largest variability between geographic ***,circularity,aspect ratio,and seed roundness showed higher variability at the tree ***,our results show that seed traits vary depending on altitude and climate ***:Revealing the amount and the structure of intraspecific traits variability of carob seed provides interesting insights to understand the mechanisms underlying trees adaptation to various environmental and ecological ***,intraspecific variatio

关键词： Carob tree Image analysis Seed traits Intraspecific variation Morocco

Ultrasound heterogeneity as an indicator of testicular salvage in testicular torsion: A single center experience

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Asian Journal of Urology 2022年第1期9卷 57-62页

作者： Omran Hasan Mohamed Mubarak S.Mohamed Jawad Alwedaie Hasan Baksh Husain Alaradi Ameer Alarayedh Ali Alaradi Abdolsalam Ahmadi Akbar jalal Department of Surgery Salmaniya Medical Complex Ringgold Standard InstitutionManamaBahrain

Objective:Testicular torsion is a common urological emergency,mainly in the younger *** aim is to evaluate the efficacy and value of testicular echogenicity in predicting testicular ***:Patients who were older than 13 years of age and were discharged with the diagnosis of testicular torsion were *** obtained included demographic data,history,physical examination results,ultrasound findings including size,color Doppler flow,and echotexture,torsion degrees,and surgical *** addition,the histopathological findings of patients who underwent orchiectomy were ***:A total of 71 cases were diagnosed with testicular torsion between January 2016 to December *** mean age at presentation was 20.4±7.0 *** average time from the onset of pain until the presentation was 36.0±55.1 *** of the 71 ultrasound scans reviewed,45.1%showed homogenous echotexture and 54.9%showed heterogeneous echotexture of the affected *** scrotal exploration,the mean degree of torsion was 475.7±301.8 degrees;66.2%of the patients had a viable testis;and bilateral orchidopexy was *** remaining 33.8%had a non-viable *** echotexture was after an average of 13.5 h of scrotal pain,while heterogeneous echotexture presented after 53.7 h of scrotal *** was a statistically significant difference between the time of presentation and echotexture changes on scrotal ultrasonography(p<0.01).The relationship between echotexture changes and testicular viability was statistically significant as well(p<0.001).Conclusion:A long time since the onset of pain coupled with heterogeneous changes in testicular parenchyma is a good indicator of ***,we still advocate for surgical exploration as the gold standard in diagnosis and management.

关键词： Testis Testicular torsion Orchiopexy Orchiectomy Ultrasound Echotexture

Effect of Different Etching Time on Fabrication of an Optoelectronic Device Based on GaN/Psi

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Journal of Renewable Materials 2023年第3期11卷 1101-1122页

作者： Haneen D.Jabbar Makram A.Fakhri Mohammed jalal Abdul Razzaq Omar S.Dahham Evan T.Salim Forat H.Alsultany U.Hashim Laser and Optoelectronic Engineering Department University of Technology-IraqBaghdadIraq Department of Civil Engineering College of EngineeringCihan University-ErbilKurdistan RegionIraq Department of Petroleum and Gas Refinery Engineering Al-Farabi University CollageBaghdadIraq Applied Science Department University of Technology-IraqBaghdadIraq Department of Medical Physics Al-Mustaqbal University CollegeBabylonIraq Institute of Nano Electronic Engineering University Malaysia PerlisKangarPerlisMalaysia

Gallium nitride(GaN)/porous silicon(PSi)film was prepared using a pulsed laser deposition method and 1064 nm Nd:YAG laser for optoelectronic applications and a series of Psi substrates were fabricated using a photoelectrochemical etching method assisted by laser at different etching times for 2.5–15 min at 2.5 min intervals.X-ray diffraction,room-temperature photoluminescence,atomic force microscopy and field emission scanning electron microscopy images,and electrical characteristics in the prepared GaN on the Psi film were *** optimum Psi substrate was obtained under the following conditions:10 min,10 mA/cm^(2),and 24%hydrofluoric *** substrate exhibited two highly cubic crystalline structures at(200)and(400)orientations and yellow visible band photoluminescence,and homogeneous pores formed over the entire *** pores had steep oval shapes and were accompanied by small dark pores that appeared topographically and *** GaN/Psi film fabricated through PLD exhibited a high and hexagonal crystallographic texture in the(002)*** properties results revealed that the photoluminescence emission of the deposited nano-GaN films was in the ultraviolet band(374 nm)related to GaN material and in the near-infrared band(730 nm)related to the Psi *** topographical and morphological results of the GaN films confirmed that the deposited film contained spherical grains with an average diameter of 51.8 nm and surface roughness of 4.8 *** GaN/Psi surface showed a cauliflower-like morphology,and the built-in voltage decreased from 3.4 to 2.7 eV after *** fabricated GaN/Psi film exhibited good electrical characteristics.

关键词： Gallium nitride porous silicon photoelectrochemical etching pulsed laser deposition optical device