排序方式: 共有34条查询结果,搜索用时 0 毫秒
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EMG模型参数间的联系 总被引:3,自引:0,他引:3
通过色谱拖尾峰EMG数学模型的计算机数值计算, 建立了拖尾峰特征参数之间的三类不同性质的线性关系, 佐证并修正了一些经验公式, 提出了计算模型参数与保留时间之间线性关系的新方法。 相似文献
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E. Elbaz M. Novello J. M. Salim M. C. Motta da Silva R. Klippert 《General Relativity and Gravitation》1997,29(4):481-487
We give a general Hamiltonian formulation of the Friedmann-Robertson-Walker (FRW) fundamental equations of a homogeneous and isotropic universe in the Standard Cosmological model. It gives some interesting insight on the 3-curvature of the universe, which is found to be obtained in terms of the scale factor (also termed radius of the universe) and its first derivative. It also leads to an easy determination of the Schrödinger equation for the (R) wave function of the universe, in the radiative era. 相似文献
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提出一种半经验的关联-预测活度系数的系统。二元系的活度系数用一过量自由焓模型推算。该模型的模型参数从2个代数方程联立求解, 其一关联模型参数与γ^∞, 另一关联模型参数与(dγ-dx)x=0。γ^∞用MOSCED模型由纯组分性质关联。(dγ/dx)x=0用三维溶解度参数关联。用该系统对145组等温极性二元系作了预测, 对计算结果与实验值作了对比。F0T6R19 相似文献
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Yakov Itin 《General Relativity and Gravitation》1999,31(12):1891-1911
We have shown recently that the gravity fieldphenomena can be described by a traceless part of thewave-type field equation. This is an essentiallynon-Einsteinian gravity model. It has an exactsphericallysymmetric static solution, that yields to theYilmaz-Rosen metric. This metric is very close to theSchwarzchild metric. The wave-type field equation cannotbe derived from a suitable variational principle by free variations, as was shown by Hehl and hiscollaborators. In the present work we are looking foranother field equation having the same exactspherically-symmetric static solution. Thedifferential-geometric structure on the manifold endowed with a smoothorthonormal coframe field is described by the scalarobjects of anholonomity and its exterior derivative. Weconstruct a list of the first and second order SO(1,3)-covariants (one- and two-indexedquantities) and a quasi-linear field equation with freeparameters. We fix a part of the parameters by acondition that the field equation is satisfied by aquasi-conformal coframe with a harmonic conformal function .Thus we obtain a wide class of field equations with asolution that yields the Majumdar-P apapetrou metricand, in particular, the Yilmaz-Rosen metric, that is viable in the framework of three classicaltests. 相似文献
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《Analytical letters》2012,45(5):459-469
Abstract The enantiomeric purity of a series of polyester model compounds has been assayed by NMR spectroscopy, using chiral lantha-nide shift reagents. The dependencc of proton and 13 C NMR spectra on concentration and temperature has been investigated. 相似文献
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Alfredo Sandoval-Villalbazo Leopoldo S. Garcia-Colin 《General Relativity and Gravitation》1999,31(5):781-786
The usual arguments related to the validity ofa thermostatical approach to several cosmologicalproblems are reviewed. It is seen that a nonequilibriumformalism is needed to solve conceptual problems in cosmology, such as the the generalization ofthe second law of thermodynamics. A cosmologicalnon-equilibrium formalism with a positive-semidefiniteentropy production is derived. The main features of a universe formulated under such a basis arestudied. 相似文献
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