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Journal of Ocean Engineering and Science 2020年第3期5卷 197-204页

作者： Mohammad Parto-Haghighi jalil Manafian Department of Mathematics University of BonabBonabIran Department of Applied Mathematics Faculty of Mathematical ScienceUniversity of TabrizTabrizIran

The nonlinear two-point boundary value problem(TPBVP)is converted to a new form of the problem including integral *** the combination of weak-form integral equation method(WFIEM)and special functions create a robust and applicable numerical scheme to solve the *** display the accuracy of our method,some examples are ***,the fractional Boussinesq-like equation involving the β-derivative has been considered that describes the propagation of small amplitude long capillary-gravity waves on the surface of shallow water.

关键词： Fractional order exponential trial functions BVPs Adjoint test functions Weak-form integral equation method Two-point boundary value problem Fractional Boussinesq-like equation

Effects of sphere size on the microstructure and mechanical properties of ductile iron–steel hollow sphere syntactic foams

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International Journal of Minerals,Metallurgy and Materials 2016年第6期23卷 676-682页

作者： Hamid Sazegaran Ali-Reza Kiani-Rashid jalil Vahdati Khaki Department of Metallurgical and Materials Engineering Faculty of Engineering Ferdowsi University of Mashhad

The effects of sphere size on the microstructural and mechanical properties of ductile iron–steel hollow sphere（DI–SHS） syntactic foams were investigated in this study. The SHSs were manufactured by fluidized-bed coating via the Fe-based commercial powder–binder suspension onto expanded polystyrene spheres（EPSs）. Afterwards, the DI–SHS syntactic foams were produced via a sand-mold casting process. The microstructures of specimens were investigated by optical microscopy, scanning electron microscopy（SEM）, and energy-dispersive X-ray spectroscopy（EDS）. The microscopic evaluations of specimens reveal distinct regions composed of the DI matrix, SHS shells, and compatible interface. As a result, the microstructures and graphite morphologies of the DI matrix depend on sphere size. When the sphere size decreases, the area fractions of cementite and graphite phases are observed to increase and decrease, respectively. Compression tests were subsequently conducted at ambient temperature on the DI–SHS syntactic foams. The results reveal that the compression behavior of the syntactic foams is enhanced with increasing sphere size. Furthermore, the compressed specimens demonstrate that microcracks start and grow from the interface region.

关键词： ductile iron steel syntactic foams microstructure mechanical properties

The Effect of Sulfate Ion on the Isomerization of n-Butane to iso-Butane

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Journal of Natural Gas Chemistry 2006年第4期15卷 247-252页

作者： Sugeng Triwahyono Zalizawati Abdullah Aishah Abdul jalil Ibnu Sina Institute for Fundamental Science Studies Faculty of Chemical and Natural Resources Engineering Universiti Teknologi Malaysia 81310 SkudaiJohorMalaysia

The effect of sulfate ion （SO4^2-） loading on the properties of Pt/SO4^2-ZrO2 and on the catalytic isomerization of n-butane to/so-butane was studied. The catalyst was prepared by impregnation of Zr（OH）4 with H2SO4 and platinum solution followed by calcination at 600 ℃. Ammonia TPD and FT-IR were used to confirm the distribution of acid sites and the structure of the sulfate species. Nitrogen physisorption and X-ray diffraction were used to confirm the physical structures of Pt/SO4^2-ZrO2. XRD pattern showed that the presence of sulfate ion stabilized the metastable tetragonal phase of zirconia and hindered the transition of amorphous phase to monoclinic phase of zirconia. Ammonia TPD profiles indicated the distributions of weak and medium acid sites observed on 0.1 N and 1.0 N sulfate in the loaded catalysts. The addition of 2.0 N and 4.0 N sulfate ion generated strong acid site and decreased the weak and medium acid sites. However, the XRD results and the specific surface area of the catalysts indicated that the excessive amount of sulfate ion collapsed the structure of the catalyst. The catalysts showed high activity and stability for isomerization of n-butane to iso-butane at 200 ℃ under hydrogen atmosphere. The conversion of n-butane to iso-butane per specific surface area of the catalyst increased with the increasing amount of sulfate ion owing to the existence of the bidentate sulfate and/or polynucleic sulfate species （（ZrO）2SO2）, which acts as an active site for the isomerization.

关键词： sulfate ion strong acid site isomerization n-butane Zr Pt

Effects of copper content on the shell characteristics of hollow steel spheres manufactured using an advanced powder metallurgy technique

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International Journal of Minerals,Metallurgy and Materials 2016年第4期23卷 434-441页

作者： Hamid Sazegaran Ali-Reza Kiani-Rashid jalil Vahdati Khaki Department of Materials Science and Metallurgical Engineering Engineering Faculty Ferdowsi University of Mashhad

Metallic hollow spheres are used as base materials in the manufacture of hollow sphere structures and metallic foams. In this study, steel hollow spheres were successfully manufactured using an advanced powder metallurgy technique. The spheres＇ shells were characterized by optical microscopy in conjunction with microstructural image analysis software, scanning electron microscopy（SEM）, energy-dispersive X-ray spectroscopy（EDX）, and X-ray diffraction（XRD）. The microscopic evaluations revealed that the shells consist of sintered iron powder, sintered copper powder, sodium silicate, and porosity regions. In addition, the effects of copper content on various parameters such as shell defects, microcracks, thickness, and porosities were investigated. The results indicated that increasing the copper content results in decreases in the surface fraction of shell porosities and the number of microcracks and an increase in shell thickness.

关键词： steel hollow spheres powder metallurgy copper content shell characteristics

Investigating the structural effect of electrospun nano-fibrous polymeric films on water vapor transmission

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Chinese Journal of Chemical Engineering 2019年第1期27卷 100-109页

作者： Seyed jalil Poormohammadian Parviz Darvishi Abdol Mohammad Ghalambor Dezfuli Chemical Engineering Department School of EngineeringYasouj University Physics Department Shahid Chamran University of Ahvaz

Electrospun polymers have many applications in the ***, the structure of these polymers has been less widely considered by *** this work, the structural effect of electrospun and casted films of polyacrylonitrile(PAN) and polyvinylidene fluoride(PVDF) polymers on water vapor transmission were *** of water vapor was measured at 35, 60 and 80 ℃ and different relative *** diffusion coefficients were calculated based on mass changes of the polymer *** water vapor transmission rate(WVTR) was also measured at 35 ℃ and 90% relative *** results indicated that electrospun nano-fibrous polymers(ESNPs) absorb much higher water vapor compared to non-porous casted *** interaction of water molecules with mentioned polymers was investigated based on Flory-Huggins *** Flory-Huggins interaction parameter of electrospun films was less than casted films, suggesting much better interaction of water molecules with electrospun *** was also found that electrospun films have anomalous kinetic behavior and do not obey the Fickian diffusion ***, it was revealed that ESNPs show less resistance to water vapor transmission and they are good candidates for the applications of water vapor separation using membranes.

关键词： Water vapor transmission Polymer structure Nanofiber Electrospinning Porous layer

Entanglement of three-level atomic system and spontaneous emission fields in a vacuum and near the 1D photonic crystal band gap

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Optoelectronics Letters 2022年第11期18卷 687-693页

作者： jalil Shiri Javad Khalilzadeh Seyyed Hossein Asadpour Department of Photonics Faculty of SciencesImam Hossein UniversityTehranlran Young Researchers and Elite Club Central Tehran BranchIslamic Azad UniversityTehranIlran

The time evolution of the quantum entropy in a GaAs/AlAs one-dimensional photonic crystal(1DPC) with an atomic system defect layer is investigated in this work. The entanglement between atomic system and their spontaneous emission fields near the edge of the photonic band gap(PBG) is coherently controlled by the coupling field. Comparison between the atom-photon entanglement of the atomic system in the vacuum surrounding and that near the PBG of the 1DPC shows that the degree of entanglement strongly depends on the PBG. We find that degree of entanglement is strongly dependent on the intensity and detuning of the coupling and probe fields. Furthermore, the effect of the phase difference between applied fields on the atom-photon entanglement is studied. The potentially possible technological applications can be provided by the proposed model in the quantum optics and quantum communications based on photonic crystal.

关键词： field system vacuum

Mechanochemical leaching of chalcopyrite concentrate by sulfuric acid

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International Journal of Minerals,Metallurgy and Materials 2016年第4期23卷 380-388页

作者： Farhad Khorramshahi Mohammadabad Sina Hejazi jalil Vahdati khaki Abolfazl Babakhani Materials and Metallurgical Engineering Department Faculty of Engineering Ferdowsi University of Mashhad Materials and Metallurgical Engineering Department Faculty of Engineering University of Tehran

This study aimed to introduce a new cost-effective methodology for increasing the leaching efficiency of chalcopyrite concentrates at ambient temperature and pressure. Mechanical activation was employed during the leaching（mechanochemical leaching） of chalcopyrite concentrates in a sulfuric acid medium at room temperature and atmospheric pressure. High energy ball milling process was used during the leaching to provide the mechanochemical leaching condition, and atomic absorption spectroscopy and cyclic voltammetry were used to determine the leaching behavior of chalcopyrite. Moreover, X-ray diffraction and scanning electron microscopy were used to characterize the chalcopyrite powder before and after leaching. The results demonstrated that mechanochemical leaching was effective; the extraction of copper increased significantly and continuously. Although the leaching efficiency of chalcopyrite was very low at ambient temperature, the percentages of copper dissolved in the presence of hydrogen peroxide（H2O2） and ferric sulfate（Fe2（SO4）3） after 20 h of mechanochemical leaching reached 28% and 33%, respectively. Given the efficiency of the developed method and the facts that it does not require the use of an autoclave and can be conducted at room temperature and atmospheric pressure, it represents an economical and easy-to-use method for the leaching industry.

关键词： chalcopyrite mechanical activation mechanochemical leaching sulfuric acid cyclic voltammetry

Covalent immobilization and characterization of Rhizopus oryzae lipase on core-shell cobalt ferrite nanoparticles for biodiesel production

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Chinese Journal of Chemical Engineering 2021年第9期34卷 128-136页

作者： Saboura Ashkevarian jalil Badraghi Fatemeh Mamashli Behdad Delavari Ali Akbar Saboury Research Institute of Applied Sciences ACECRShahid Beheshti UniversityTehranIran Institute of Biochemistry and Biophysics University of TehranTehranIran Center of Excellence in Biothermodynamics University of TehranTehranIran

Rhizopus oryzae lipase(ROL)was immobilized on the surface of silica coated amino modified CoFe_(2)O_4 nanoparticles and applied for biodiesel *** results indicated more affinity of the ROL toward its substrate upon immobilization,as revealed by a lower Km value for the immobilized ROL compared to its free *** fluorescence spectroscopy indicated a lower intensity for ROL immobilized on CoFe_(2)O_4 ***,immobilized ROL steady state anisotropy measurements presented lower values,which implied assembly of ROL molecules on magnetic nanoparticles upon immobilization as well as their restricted rotation upon covalent *** stability analysis revealed improved activity at higher temperatures for the immobilized enzyme compared to its free ***,Pace analysis to determine protein thermal stability revealed preservation of the protein conformation in the presence of increasing temperatures upon immobilization on ***,ROL immobilized on CoFe_(2)O_(4)nanoparticles exhibited improved efficiency of biodiesel production in agreement with thermal activity ***,the authors suggest application of the lipase molecules immobilized on CoFe_(2)O_(4)nanoparticles for more efficient biodiesel production.

关键词： Lipase immobilization CoFe_(2)O_(4)magnetic nanoparticles Steady state anisotropy Biodiesel Biocatalysis Protein stability

Isolation of aerobic bacteria from ticks infested sheep in Iraq

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Asian Pacific Journal of Tropical Biomedicine 2016年第1期6卷 67-70页

作者： Waleed Ibrahem jalil Mohammad Mushgil Zenad Department of Veterinary Internal and Preventive Medicine College of Veterinary Medicine University of Diyala Department of Veterinary Internal and Preventive Medicine College of Veterinary Medicine University of Baghdad

Objective:To highlight the presence of aerobic bacteria in live ticks infested sheep,in Diyala Governorate,***:One hundred and thirty adult alive ticks were picked up from sheep which were reared in different farms in Diyala Governorate,Iraq,during the period from November 2012 to May *** were classified in the Natural History Museum in *** were dissected aseptically for extraction of the salivary gland and *** removed tissue from each organ was inoculated in buffer peptone water(1%)and incubated for 2 h at 37 °C,to maintain weak and/or injured bacterial cells,then transmitted to nutrient broth incubated at 37 °C for 18 *** was done on three solid bacteriological media(nutrient,blood and McConkey agars),and then incubated at37 ℃ for 24 *** identification was performed by using multiple biochemical tests and API-20 *** were analyzed by using Statistical Analysis System version 9.1,***-square test was used for comparison at significant level of P ≤ ***:Two species of ticks were identified[Rhipicephalus(Boophilus) annulatus and Hyalomma turanicum].High bacterial isolation rate was observed(483 isolates).A significant high isolation rate was recorded from Rhipicephalus annulatus(63.14%).Six bacterial species were identified[Escherichia coli(28.36%),Pseudomonas aeruginosa(18.01%),Bacillus cereus(14.69%),Staphylococcus aureus(13.66%),Citrobacter freundii(13.04%),and Enterobacter species(12.21%)].Also the high bacterial isolation rates were recorded in the temperate months(November,March and April);these coincided with high reproductive performance of ***:The high isolation rate of aerobic pathogens from ticks might reflect the active contribution of this arthropod in environmental contamination and increase the probability of transmitting bacterial pathogens to their hosts.

关键词： Ticks Aerobic bacteria Sheep Iraq

Multiple rogue wave and solitary solutions for the generalized BK equation via Hirota bilinear and SIVP schemes arising in fluid mechanics

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Communications in Theoretical Physics 2020年第7期72卷 8-20页

作者： jalil Manafian Onur Alp Ilhan As’ad Alizadeh Sizar Abid Mohammed Department of Applied Mathematics Faculty of Mathematical SciencesUniversity of TabrizTabrizIran Department of Mathematics Faculty of EducationErciyes University38039-Melikgazi-KayseriTurkey Department of Mechanical Engineering Urmia University of TechnologyUrmiaIran Department of Mechanical Engineering College of EngineeringUniversity of ZakhoZakhoIraq Department of Mathematics College of Basic EducationUniversity of DuhokZakho Street 381006 AJ DuhokIraq

The multiple lump solutions method is employed for the purpose of obtaining multiple soliton solutions for the generalized Bogoyavlensky-Konopelchenko(BK)*** solutions obtained contain first-order,second-order,and third-order wave *** the critical point,the second-order derivative and Hessian matrix for only one point is investigated,and the lump solution has one maximum ***’s semi-inverse variational principle(SIVP)is also used for the generalized BK *** major cases are studied,based on two different ansatzes using the *** physical phenomena of the multiple soliton solutions thus obtained are then analyzed and demonstrated in the figures below,using a selection of suitable parameter *** method should prove extremely useful for further studies of attractive physical phenomena in the fields of heat transfer,fluid dynamics,etc.

关键词： multiple rogue wave solutions multiple soliton solutions generalized Bogoyavlensky–Konopelchenko equation semi-inverse variational principle