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Effect of tritium reduction in determining energy gain by using R-matrix method direct laser fusion in D-T reaction

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nuclear Science and Techniques 2007年第3期18卷 129-136页

作者： S.n.HOSSEInI mOTLAGH Sh.S.mOHAmADY m.kh.mORADkh.nI R.SHAmSI Department of Physics Iran University of Science and Technology IranDepartment of PhysicsIran University of Science and Technology IranDepartment of PhysicsIran University of Science and Technology IranDepartment of Industrial EngineeringMazandaran University of Science and Technology Iran

The laser fusion criterion is known as the ρR-Criterion, also called high-gain condition. This parameter is temperature dependent and can be calculated by R-matrix method. This method is applied for determining improved fusion cross-section for the reactions T(d,n)4He, 3He(d,p)4He, D(d,p)T, D(d,n)3He. In this paper the time dependent reaction rate equations for fusion reaction T(d,n)4He are solved and by using the obtained results we computed the fu- sion power density, energy gain versus temperature and ρR-parameter. The obtained results show that a suitable com- bination may be a deuterium fraction fD=0.65 and fT=0.35 which would lead 30% reduction in the tritium content of the fuel mixture, and this choice would not change the energy gain value very much. Finally, the obtained energy gain for D-T reaction by using R-matrix is in good agreement with other theories.

关键词：氘氚反应激光聚合等离子体交叉断面

The modern Information Technologies and Visualization methods for Analysis of Computer Simulation Results for Complex Plasma

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Communications in Computational Physics 2014年第4期15卷 981-995页

作者： T.S.Ramazanov S.K.Kodanova m.K.Issanova n.kh.Bastykova Zh.A.moldabekov IETP Al-Farabi Kazakh National University71Al-Farabi av.Almaty050040Kazakhstan

In this paper we present a software package based on modern information technologies that allows rapid analysis and visualization of the properties of complex *** properties of plasma are simulated by two *** of all,we have applied the molecular dynamics simulation method which numerically solves the equations of motions for plasma ***,we calculate microscopic properties of plasma by using the Boltzmann equation with additional relations,initial and boundary conditions.

关键词： molecular dynamics simulation method modern information technology software package program software

The effect of K2SiF6 on the mgH2 hydrogen storage properties

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Journal of magnesium and Alloys 2020年第3期8卷 832-840页

作者： m.Ismail m.S.Yahya n.A.Sazelee n.A.Ali F.A.Halim Yap n.S.mustafa Energy Storage Research Group Faculty of Ocean Engineering Technology and InformaticsUniversity Malaysia Terengganu21030 Kuala TerengganuMalaysia Faculty of Innovative Design and Technology Universiti Sultan Zainal AbidinGong Badak Campus21300 Kuala NerusTerengganuMalaysia

The catalytic effect of K2SiF6 on mgH2 was first timely *** mgH2+5 wt.%K2SiF6 was prepared via the ball milling *** catalyst had lessened the initial decomposition temperature by 134℃ and 48℃ as compared to both pristine and milled mgH2 samples,*** 2 minutes,4.5 wt.%of hydrogen was absorbed(250℃)by the doped composite,which was 0.8 wt.%higher than the milled ***,for the desorption kinetics(320℃,1 atm),the amount of desorbed hydrogen was increased by 2.4 wt.%and 2.3 wt.%for the first 10 and 20 ***,contracting volume and Johnson-mehl-Avrami models were used to analyse the kinetics *** decomposition activation energy calculated based on Kissinger equation was 114 kJ/*** for the active species,mg2Si,mgF2 and kh were formed during the heating *** active species are speculated to be responsible for the improvement of the hydrogenation properties of the composite.

关键词： Catalytic effect magnesium hydride Hydrogen storage Sorption properties Contracting volume model

The micropolar fluid model for blood flow through a tapered artery with a stenosis

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Acta mechanica Sinica 2008年第6期24卷 637-644页

作者： kh.S.mekheimer m.A.El Kot Department of mathematics Faculty of ScienceAl-Azhar UniversityNasr CityCairo 11884Egypt Department of mathematics Faculty of EducationSuez Canal UniversitySuezEgypt

A micropolar model for axisymmetric blood flow through an axially nonsymmetreic but radially symmetric mild stenosis tapered artery is presented. To estimate the effect of the stenosis shape, a suitable geometry has been considered such that the axial shape of the stenosis can be changed easily just by varying a parameter （referred to as the shape parameter）. The model is also used to study the effect of the taper angle Ф. Flow parameters such as the velocity, the resistance to flow （the resistance impedance）, the wall shear stress distribution in the stenotic region and its magnitude at the maximum height of the stenosis （stenosis throat） have been computed for different values of the shape parameter n, the taper angle Ф, the coupling number n and the micropolar parameter m. It is shown that the resistance to flow decreases with increasing the shape parameter n and the micropolar parameter m while it increases with increasing the coupling number n. So, the magnitude of the resistance impedance is higher for a micropolar fluid than that for a newtonian fluid model. Finally, the velocity profile, the wall shear stress distribution in the stenotic region and its magnitude at the maximum height of the stenosis are discussed for different values of the parameters involved on the problem.

关键词： micropolar fluid Blood flow Tapered artery

Effect of coaxial laser cladding parameters on bead formation

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International Journal of minerals,metallurgy and materials 2017年第5期24卷 550-556页

作者： A.I.noskov A.kh.Gilmutdinov R.m.Yanbaev Kazan national Research Technical University 10 Karl Marx Str. Kazan 420111 Republic of Tatarstan Russian Federation

We investigated the shape and morphology of nickel-based powder particles (Sulzer metco) and coatings produced by laser gas-powder deposition onto steel substrates. Laser deposition was performed using an LC-10 IPG-Photonics laser complex equipped with a 10-kW fiber laser. The shape and microstructure of the samples were studied using optical and electronic microscopy and X-ray diffraction analysis. The results showed that the deposition speed and laser power significantly influenced the shape and size of the beads. The depth of diffusion of nickel into the steel substrate after deposition was less than 20 μm; the microstructure of the resulting coating was fcc Fe3ni. As a result, detailed information about the form and shape of the filler powder, modes of its deposition, and the resulting coating structure was obtained; this information is important for the production of high-quality products by additive technologies.

关键词： laser cladding additive manufacturing microstructure morphology bead formation

Effects of Common Ions on Zn Sorption in Some Calcareous Soils of Western Iran

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Pedosphere 2012年第2期22卷 190-200页

作者： m.JALALI n.AHmADI mOHAmmAD ZInLI Department of Soil Science College of AgricultureBu-Ali Sina University

Zinc （Zn） is essential to plant growth and relatively mobile in soils. This study was conducted to assess the effect of common ions （Ca2＋, K＋, na＋, nH＋, CI-, nO3-, and H2PO4） on sorption of Zn in surface samples of ten calcareous soils from western Iran using 10 mmol L-1 KC1, KnO3, kh2P04, Ca（n03）2, nAn03, and nH4n03 solutions as background electrolytes. The results indicated that both nH＋, K＋, and Ca2＋ equally decreased Zn sorption as compared to na＋. Zinc sorption was decreased by H2PO4- as compared to nO3 and Cl-. The Langmuir and Freundlich equations fitted closely to the sorption data of all ions. The Langmuir maximum, bonding energy constant, and Freundlich distribution coefficient for Zn sorption differed among the various ionic background electrolytes. Langmuir sorption parameters showed that the presence of H2PO4- decreased the maximum Zn adsorbed, but increased the bonding energy. Although K＋ and nH＋ equally influenced maximum Zn adsorbed, they differed in their effect on the distribution coefficient of Zn in soils. Values of saturation index calculated using Visual mInTEQ indicated that at the low Zn concentration, Zn solubility was controlled by sorption reactions and at the high Zn concentration, it was mainly controlled by sorption and mineral precipitation reactions, such as precipitation of Zn3（PO4）2.4H2O, Zn5（OH）6（CO3）2, and ZnCO3. For most ionic background electrolytes, soil pH, CaC03, and cation exchange capacity （CEC） were significantly correlated with sorption parameters.

关键词： background electrolytes distribution coefficient mineral precipitation saturation index Zn solubility

The composition of acid/oil interface in acid oil emulsions

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Petroleum Science 2020年第5期17卷 1345-1355页

作者： Yulia m.Ganeeva Tatiana n.Yusupova Ekaterina E.Barskaya Alina kh.Valiullova Ekaterina S.Okhotnikova Vladimir I.morozov Lucia F.Davletshina Arbuzov Institute of Organic and Physical Chemistry FRC Kazan Scientifi c CenterRussian Academy of SciencesArbuzov str.8Kazan 420088Russian Federation Gubkin Russian State University of Oil and Gas(national Research University) Leninsky Prospekt 65Moscow 119991Russian Federation

In well stimulation treatments using hydrochloric acid,undesirable water-in-oil emulsion and acid sludge may produce and then cause operational problems in oil field *** processes intensify in the presence of Fe(Ⅲ),which are from the corroded surfaces of field equipment and/or iron-bearing minerals of the oil *** order to understand the reasons of the stability of acid emulsions,acid emulsions were prepared by mixing crude oil emulsion with 15% hydrochloric acid solutions with and without Fe(Ⅲ) and then separated into free and upper(water free) and intermediate(with water) *** is assumed that the oil phase of the free and upper layers contains the compounds which do not participate in the formation of acid emulsions,and the oil phase of the intermediate layers contains components involved in the formation of oil/acid *** composition of the oil phase of each layer of the emulsions was *** is found that the asphaltenes with a high content of sulfur,oxygen and metals as well the flocculated material of protonated non-polar oil components are concentrated at the oil/acid *** addition to the above,in the presence of Fe(Ⅲ) the Fe(Ⅲ)-based complexes with polar groups of asphaltenes are formed at the acid/oil interface,contributing to the formation of armor films which enhance the emulsion stability.

关键词： Acid emulsions Ferric cations Acid/oil interface Asphaltenes Resins Waxes Oil paramagnetic particles Fe(Ⅲ)-based complexes

Surface-type humidity sensor based on cellulose-PEPC for telemetry systems

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Journal of Semiconductors 2011年第1期32卷 103-107页

作者： kh.S.Karimov m.Saleem T.A.Qasuria m.Farooq GIK Institute of Engineering Sciences and Technology physical Technical Institute Aini St.299/1Dushanbe734063Tajikistan

Au/cellulose-PEPC/Au surface-type humidity sensors were fabricated by drop-casting cellulose and poly-n-epoxypropylcarbazole （PEPC） blend thin films. A blend of 2wt% of each cellulose and PEPC in benzol was used for the deposition of humidity sensing films. Blend films were deposited on glass substrates with preliminary deposited surface-type gold electrodes. Films of different thicknesses of cellulose and PEPC composite were deposited by drop-casting technique. A change in electrical resistance and capacitance of the fabricated devices was observed by increasing the relative humidity in the range of 0-95% RH. It was observed that the capacitances of the sensors increase, while their resistances decrease with increasing the relative humidity. The sensors were connected to op-amp square wave oscillators. It was observed that with increasing the relative humidity, the oscillator＇s frequencies were also increased in the range of 4.2-12.0 khz for 65μm thick film sample, 4.1-9.0 khz for 88μm thick film sample, and 4.2-9.0 khz for 210μm sample. Effects of film thickness on the oscillator＇s frequency with respect to humidity were also investigated. This polymer humidity sensor controlled oscillator can be used for short-range and long-range remote systems at environmental monitoring and assessment of the humidity level.

关键词： surface-type sensor: cellulose poly-n-epoxvoropylcarbazole humidity sensor controlled oscillator

novel pressure and displacement sensors based on carbon nanotubes

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Chinese Physics B 2015年第1期24卷 560-563页

作者： kh.S.Karimov khaulah Sulaiman Zubair Ahmad khakim m.Akhmedov A.mateen GIK Institute of Engineering Sciences and Technology Topi District Swabi KPK 23640 Pakistan Physical Technical Institute of Academy of Sciences Rudaki Ave. 33 Dushanbe 734025 Tajikistan Low Dimensional materials Research Centre (LDmRC) Department of Physics Faculty of Science University of Malaya 50603 Kuala Lumpur Malaysia Center for Innovative Development of Science and new Technologies of Academy of Sciences Rudaki Ave. 33 Dushanbe 734025 Tajikistan Faculty of materials Science and Engineering Institute of Space Technology Islamabad 44000 Pakistan

We report newly designed pressure and displacement capacitive sensors based on a flexible paper–CnT *** carbon nanotube（CnT） powder was deposited on a thin paper substrate and was pressed at an elevated *** sheet resistance of the paper–CnT films was in the range of 2–4 kΩ/cm^2. The paper–CnT films were used to fabricate pressure and displacement sensors. The sensitivities of the pressure and the displacement sensors were found to be17.3 p F·m^2/k n and 0.93 10-3p F/μm, respectively. The experimental results were compared with the simulated data and they found good agreement with each other.

关键词： carbon nanotube sensors composite capacitance