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Experimental Study of Wave Pressure on a Breakwater Pier

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China Ocean Engineering 1999年第2期14卷 209-216页

作者： Pan, sh Xia, QY Lin, SQ Xu, LH Hohai Univ Coll Harbour Waterway & Coastal Engn Dept Coastal Engn Nanjing 210098 Peoples R China Fujian Prov Ports & shipping Adm Bur Fuzhou 350009 Peoples R China

Test studies on the wave pressure on a breakwater pier show that the influence of transmissive wave pressure on the outside wall of the breakwater pier is considerable, when the width of the pier is not very large. The variations of transmissive wave pressure on the breakwater pier with different widths are compared and the relationship is obtained between relative transmitting distance b/L and wave pressure reduction factor K, which may be used in the design of similar breakwater piers.

关键词： wave pressure breakwater pier

Effect of the duty cycle of pulsed current on nanocomposite layers formed by pulsed electrodeposition

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Rare Metals 2010年第2期29卷 209-213页

作者： M.Aliofkhazraei sh.Ahangarani A.Sabour Rouhaghdam Department of Materials Engineering Faculty of Engineering Tarbiat Modares University Department of Advanced Materials & Renewable Energies Iranian Research Organization for Science and Technology(IROST)

Nickel-tungsten/carbon nanotube nanocomposite layers with high content and uniform dispersion of carbon nanotubes were fabricated using pulsed electrodeposition *** layers were analyzed by scanning electron microscopy, atomic force microscopy, microhardness, and Tafel polarization *** effect of the duty cycle of pulsed current or concentration of carbon nanotubes in the metallic matrix on electrochemical and mechanical properties of obtained layers has been *** has been shown that both the electrochemical and mechanical properties of nanocomposite layers that formed by pulsed current were improved significantly with respect to un-composed Ni-W *** results were not only concerned by the concentration of carbon nanotubes in the layer but also influenced by the distribution of nanoparticulates in the metallic matrix.

关键词： nanocomposite corrosion nanostructure carbon nanotubes

Monoenergetic electron parameters in a spheroid bubble model

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Chinese Physics B 2013年第2期22卷 347-351页

作者： H.Sattarian sh.Rahmatallahpur T.Tohidi Maraghe Branch Physics DepartmentIslamic Azad UniversityMaraghehIran Bonab Branch Physics DepartmentIslamic Azad UniversityBonabIran Department of Physics Azarbaijan University of Tarbiat MoallemTabrizIran

A reliable analytical expression for the potential of plasma waves with phase velocities near the speed of light is *** presented spheroid cavity model is more consistent than the previous spherical and ellipsoidal models and it explains the mono-energetic electron trajectory more accurately,especially at the relativistic *** maximum energy of electrons is calculated and it is shown that the maximum energy of the spheroid model is less than that of the spherical *** electron energy spectrum is also calculated and it is found that the energy distribution ratio of electrons △E/E for the spheroid model under the conditions reported here is half that of the spherical model and it is in good agreement with the experimental value in the same *** a result,the quasi-mono-energetic electron output beam interacting with the laser plasma can be more appropriately described with this model.

关键词： quasi-mono-energetic electron bunches intense laser plasma accelerator laser wake field bubble regime

Effect of surface nanocrystallization and PPEC time on complex nanocrystalline hard layer fabricated by plasma electrolysis

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Transactions of Nonferrous Metals Society of China 2010年第3期20卷 425-431页

作者： M.ALIOFKHAZRAEI sh.AHANGAR ANI A.SABOUR ROUHAGHDAM Department of Materials Engineering Faculty of EngineeringTarbiat Modares University Department of Advanced Materials and Renewable Energies Iranian Research Organization for Science and Technology(IROST)

Size distribution of nano-carbides produced by duplex treatments of surface nanocrystallization(by surface severe plastic deformation) and plasma electrolytic carburizing on CP-Ti was *** and kurtosis of Gussian shape distribution curves were studied and the effect of time was *** usage of longer time is more suitable for achieving less size of complex *** roughness of treated samples was *** is observed that there is an optimum level for time on surface roughness increasing(difference between two measured data).

关键词： surface nanocrystallization hard layer roughness CP-Ti

PROXIMINAL SUBSPACES OF 2-NORMED SPACES

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Analysis in Theory and Applications 2006年第2期22卷 114-119页

作者： sh.Rezapour Azarbaidjan University of Tarbiat Moallem Iran

In 1965 Gohler introduced 2-normed spaces and since then, this topic have been intensively studied and developed. We shall introduce the notion of 1-type proximinal subspaces of 2-normed spaces and give some results i... 详细信息

关键词： b-proximinal subspaces 1-type proximinal subspaces 2-functionals

Prediction of operational parameters effect on coal flotation using artificial neural network

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Journal of University of Science and Technology Beijing 2008年第5期15卷 528-533页

作者： E. Jorjani sh. Mesroghli S. Chehreh Chelgani Department of Mining Engineering Science and Research BranchIslamic Azad University

Artificial neural network procedures were used to predict the combustible value （i.e. 100-Ash） and combustible recovery of coal flotation concentrate in different operational conditions. The pulp density,pH,rotation rate,coal particle size,dosage of collector,frother and conditioner were used as inputs to the network. Feed-forward artificial neural networks with 5-30-2-1 and 7-10-3-1 arrangements were capable to estimate the combustible value and combustible recovery of coal flotation concentrate respectively as the outputs. Quite satisfactory correlations of 1 and 0.91 in training and testing stages for combustible value and of 1 and 0.95 in training and testing stages for combustible recovery prediction were achieved. The proposed neural network models can be used to determine the most advantageous operational conditions for the expected concentrate assay and recovery in the coal flotation process.

关键词： coal flotation operational parameters artificial neural networks combustible recovery

ε-WEAKLY CHEBYshEV SUBSPACES OF BANACH SPACES

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Analysis in Theory and Applications 2003年第2期19卷 130-135页

作者： sh.Rezapour Azarbaidjan University of Tarbiat Iran

We will define and characterize ε-weakly Chebyshev subspaces of Banach spaces. We will prove that all closed subspaces of a Banach space X are ε-weakly Chebyshev if and only if X is reflexive.

关键词： ε-quasi Chebyshev subspace ε-weakly Chebyshev subspace

ε-PSEUDO CHEBYshEV AND ε- QUASI CHEBYshEV SUBSPACES OF BANACH SPACES

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Analysis in Theory and Applications 2004年第4期20卷 350-357页

作者： sh. Rezapour Department of Mathematics Azarbaidjan University of Tarbiat Moallem Tabriz 51745-406 Iran

We will define and characterize ε-pseudo Chebyshev and ε-quasi Chebyshev subspaces of Banach spaces. We will prove that a closed subspace W is ε-pseudo Chebyshev if and only if W is ε-quasi Chebyshev.

关键词： ε-pseudo Chebyshev subspace ε-quasi Chebyshev subspace

Isolating sorbicilin-producing fungi from Darband cave and evaluating the sorbicilin biomedical applications

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Studies in Fungi 2020年第1期5卷 103-112页

作者： Zareshahi F Abolmaali sh Darvish Alipour Astaneh sh Asghari A Dep.for Biotechnology Faculty of BiotechnologySemnan UniversityIran Dep.for Biology Faculty of Basic ScienceSemnan UniversityIran Dep.for Chemistry Faculty of ChemistrySemnan UniversityIran

To evaluate the potential of fungi from Darband cave,Semnan,Iran,for valuable antibacterial and anticancer agents,molecular screening was done against polyketides(PKS);the source for numerous diverse secondary *** were isolated from soil and *** antibacterial activity of the isolates was studied against indicator bacteria by well diffusion agar method,and analyzed by PCR for PKS *** positive strains were compared for toxicity against indicators and A549 *** of antibacterial agents was investigated in 26 days followed by partial purification of the *** layer chromatography(TLC)and High Performance Liquid Chromatography(HPLC)analyses were done to reveal the nature of the toxin(s).The isolates exhibited the antimicrobial activity against Staphylococcus aureus,Bacillus cereus,and Bacillus *** isolates selected for further studies based on the yellow culture broth,the presence of PKS,and antibacterial *** strains were identified as Penicillium chrysogenum using 18s rDNA *** yellow culture,87%identity of the PKS 12/PKS 13,the results of HPLC,and the toxic effects against certain bacteria and A549 cells confirmed the production of the sorbicillinoid in *** strains;DDFCC170 and *** partially-purified antibacterial-anticancer agents named as AnBa170 and AnBa186 exhibited bactericide effect on *** and *** compounds killed A549 cells with an IC_(50) value of 0.25μM and 0.22μM ***170 and AnBa186 are attractive for pharmaceutical *** on the literature,the cytotoxicity of sorbicillinoids against tumor cells and bacteria is related to their oxidation capacity.

关键词： Antibacterial Penicillium chrysogenum PKS Sorbicillin