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The Classification of Filiform Leibniz Superalgebras of Nilindex n+m

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Acta Mathematica Sinica,English Series 2009年第2期25卷 171-190页

作者： sh.A.AYUPOV B.A.OMIROV A.Kh.KHUDOYBERDIYEV Institute of Mathematics and Information Technologies of Academy Sciences of Uzbekistan Department of Mathematics National University of Uzbekistan

In this work the classification of filiform Leibniz superalgebras of nilindex n ＋ m, where n and m （m≠0） are dimensions of even and odd parts, respectively, is obtained.

关键词： Lie superalgebras Leibniz superalgebras nilpotency characteristic sequence

MULTIPLICATION OPERATORS ON INVARIANT SUBSPACES OF FUNCTION SPACES

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Acta Mathematica Scientia 2013年第5期33卷 1463-1470页

作者： B.YOUSEFI sh.KHOshDEL Y.JAHANshAHI Department of Mathematics Payame Noor University

Let Mφ be the operator of multiplication by φ on a Hilbert space of functions analytic on the open unit disk. For an invariant subspace F for the multiplication operator Mz, we derive some spectral properties of the multiplication operator Mφ ： F→F. We characterize norm, spectrum, essential norm and essential spectrum of such operators when F has the codimension n property with n∈{1,2,...,＋∞}.

关键词： invariant subspace Hilbert space of analytic functions essential spectrum essential norm Fredholm operator multiplication operator

Inverse Heat Transfer Problem of Thermal Contact Conductance Estimation in Periodically Contacting Surfaces

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Journal of Thermal Science 2009年第2期18卷 150-159页

作者： M.H.shojaeefard K.Goudarzi M.sh.Mazidi Dept. of Mechanical Engineering Iran University of Science and Technology

The problems involving periodic contacting surfaces have different practical applications. An inverse heat conductionproblem for estimating the periodic Thermal Contact Conductance (TCC) between one-dimensional, constantproperty contacting solids has been investigated with conjugate gradient method (CGM) of function *** method converges very rapidly and is not so sensitive to the measurement errors. The advantage of thepresent method is that no a priori information is needed on the variation of the unknown quantities, since the solutionautomatically determines the functional form over the specified domain. A simple, straight forward techniqueis utilized to solve the direct, sensitivity and adjoint problems, in order to overcome the difficulties associatedwith numerical methods. Two general classes of results, the results obtained by applying inexact simulatedmeasured data and the results obtained by using data taken from an actual experiment are presented. In addition,extrapolation method is applied to obtain actual results. Generally, the present method effectively improves theexact TCC when exact and inexact simulated measurements input to the analysis. Furthermore, the results obtainedwith CGM and the extrapolation results are in agreement and the little deviations can be negligible.

关键词： thermal contact inverse problem conjugates gradient method

The Possibility of Wax Formation in Gas Fields:a Case Study

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Journal of Natural Gas Chemistry 2007年第3期16卷 293-300页

作者： Z.Jeirani A.Lashanizadegan sh.Ayatollahi J.Javanmardi School of Chemical and Petroleum Engineering Shiraz UniversityShirazIran School of Chemical Engineering Shiraz University of TechnologyShiraz.Iran

Natural gas production from a gas reservoir （Reservoir A） located in the south of Iran, presents solids deposition during processing because the condensate contains suspended and dissolved solids. Solids deposition occurs not only in the transportation lines from the wells to the separators but also in the various operating units of gas streams and condensate stream. In this study, the multisolid-phase model has been used to predict the wax precipitation from gas and gas condensate fluids. The properties of gas and liquid phases are described using the Soave-Redlich-Kwong （SRK） equation of state. The model is then used to predict the possibility of the wax formation in Reservoir A gas facilities, located at the south of Iran. Solid deposition which occurred in the various streams of that facility confirmed the calculated results. Finally, the wax appearance temperature （WAT）, the weight percent of wax formation and the effects of pressure and temperature on the wax formation were also predicted.

关键词： wax precipitation fluid phase equilibria multisolid model gas condensate

Two-dimensional Modeling of a Salt-gradient Solar Pond with Wall shading Effect and Thermo-physical Properties Dependent on Temperature and Concentration

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Journal of Thermal Science 2011年第4期20卷 362-370页

作者： Mohsen Mazidi Mohammad Hassan shojaeefard Mohammad sh.Mazidi Hossein shojaeefard Mechanical Engineering Department Islamic Azad University School of Mechanical Engineering Iran University of Science and Technology Management Business Administration Department Amirkabir University of Technology

In this paper,the behavior of a salt-gradient solar pond with the square cross-section has been studied experimentally and numerically.A small-scale solar pond were designed and built to provide quantitative data.A two-dimensional,transient heat and mass transfer model has been solved numerically by using finite-control-volume *** this study,all the thermo-physical properties are variable as the function of temperature and salt *** results as obtained for the experimental pond have been satisfactorily compared and validated against measured ***,the wall shading effect has been elaborated to improve the agreement between two sets of *** temperature of the storage zone is predicted well by the *** also can be observed that the initial concentration profile is preserved with *** stability of the pond in time has been investigated in order to distinguish the critical ***,the application of an energy analysis gives an efficiency of about 12%for the pond.

关键词： solar energy salt-gradient solar pond transient heat and mass transfer temperature and concentration profiles stability thermal efficiency

Tameness and Artinianness of Graded Generalized Local Cohomology Modules

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Algebra Colloquium 2015年第1期22卷 131-146页

作者： M. Jahangiri N. shirmohammadi sh. Tahamtan Faculty of Mathematical sciences and Computer Kharazmi University rlbhran Iran School of Mathematics Institute for Research in Fundamental Sciences (IPM) P.O. Box 19395-5749 Tehran Iran School of Mathematics Institute for Research in Fundamental Sciences (IPM) P.O. Box 19395-5749 rlbhran Iran Department of Mathematics University of Tabriz Tabriz Iran Islamic Azad University Borujerd Branch Boroujerd Iran

Let R = ⊙n〉0 Rn be a standard graded ring, a ∩ ⊙n〉0 Rn an ideal of R, and M, N two finitely generated graded R-modules. This paper studies the homogeneous components of graded generalized local cohomology modules. We show that for any i 〉 0, the n-th graded component Hiα（M, N）n of the i-th generalized local cohomology module of M and N with respect to a vanishes for all n 〉〉 0. Some sufficient conditions are pro- posed to satisfy the equality sup{end（Hiα （M, N）） [ i _〉 0} = sup{end（HiR＋（M, N））｜ i 〉 0}. Also, some sufficient conditions are proposed for the tameness of Hiα（M, N） such that i = fRα＋（M,N） or i = cdα（M,g）, where fRα＋（M,N） and cdα（M,g） denote the R＋- finiteness dimension and the cohomological dimension of M and N with respect to a, respectively. Finally, we consider the Artinian property of some submodules and quotient modules of Hjα（M, N）, where j is the first or last non-minimax level of Hiα（M, N）.

关键词： graded rings and modules generalized local cohomology Artinian modules,tameness

Rapid Prototyping of Ceramic Components by Slurry Jet Printing——Ⅰ.

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材料导报 2000年第Z10期14卷 361-363页

作者： Jang,JH Wang,sh

Rapid Prototyping of Ceramic Components by Slurry Jet Printing——Ⅱ.Jet

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材料导报 2000年第Z10期14卷 364-365页

作者： Jang,JH Wang,sh

超高效液相色谱-串联质谱法测定动物源性食品中4种β-阻断剂残留

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化学研究与应用 2024年第10期36卷 40-47页

作者：姚静吴恋刘川石培育廖梅毛锐陈世奇宋娟成都市食品检验研究院四川成都611130 国家市场监管重点实验室(营养与健康化学计量及应用) 北京100029 国家市场监管重点实验室(调味品监管技术) 重庆401120

建立了同位素标记-超高效液相色谱-串联质谱法测定畜肉、禽肉、鱼肉、牛奶和鸡蛋中普萘洛尔、美托洛尔、卡替洛尔、阿替洛尔4种β-阻断剂残留的检测方法。样品酶解后经乙腈提取,通过式固相萃取柱净化,超高效液相色谱-串联质谱仪测定,同... 详细信息

建立了同位素标记-超高效液相色谱-串联质谱法测定畜肉、禽肉、鱼肉、牛奶和鸡蛋中普萘洛尔、美托洛尔、卡替洛尔、阿替洛尔4种β-阻断剂残留的检测方法。样品酶解后经乙腈提取,通过式固相萃取柱净化,超高效液相色谱-串联质谱仪测定,同位素内标法定量。结果表明,4种β-阻断剂在相应质量浓度范围内线性关系良好,相关系数均大于0.995,检出限为0.5μg·kg^(-1),方法回收率在78.4~102.6%之间,相对标准偏差(n=6)为1.9~8.7%。该方法简便快速,灵敏度高,实用性强,可用于动物源性食品中4种β-阻断剂残留检测。

关键词：超高效液相色谱-串联质谱同位素标记动物源性食品 β-阻断剂