共查询到18条相似文献,搜索用时 82 毫秒
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我们提出一种描述XH3分子的伸缩和弯曲振动的U(2)代数哈米顿量,其中包括了伸缩和弯曲振动的费米共振耦合,用它来拟合CH3Cl分子的实验数据,结果表明有较少参数的代数模型算得的偏差比其它模型算得的偏差要小. 相似文献
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我们提出一种描述XH3分子的伸缩和弯曲振动的U(2)代数哈米顿量,其中包括了伸缩和弯曲振动的费米共振耦合;用它来拟合CH3Cl分子的实验数据,结果表明有较少参数的代数模型算得的偏差比其它模型算得的偏差要小. 相似文献
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采用光谱分析技术,系列研究了已有代数迭代重建算法,并进一步研制了改进算法一简单自相关代数迭代重建算法(SSART).采用数值模拟的方法模拟重建一个含遮挡物场,研究了SSART模拟效果和重建精度.作为对照,分析了已有的传统代数迭代算法同条件下的重建结果,包括基本代数迭代重建算法(ART)、联合代数迭代重建法(SART)和改进的联合代数迭代重建法(MSART).重建精度用均方误差(MSE),绝对平均误差(AVE)和峰值相对误差(PE)三种误差指数标定.结果发现,SSART重建结果的三种误差指数都明显减小,其中MSE在10-4数量级上比ART的降低了26.6%,PE在10-2数量级降低了77.6%.因此,SSART重建含遮挡物模型场时,重建精度大幅度提高,重建效果明显改善,对传统代数迭代重建算法显著改进. 相似文献
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ALGEBRAIC METHOD FOR VIBRATIONAL ENERGY SPECTRA OF H 2O AND NO 2 总被引:1,自引:0,他引:1
文内提出一种研究H2O和NO2高激发伸缩振动的U(2)代数模型,在极限条件下,该模型退化为一种非谐和耦合的局域模模型,用该模型的六个可调参数拟合实验数据,算得的标准偏差比相应的非谐和耦合的局域模型算得的偏差要小 相似文献
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用推广的U(2)代数模型,对正四面体分子的伸缩振动能谱进行了理 论研 究,该模型成功地应用到SnD4的最新观测到的高分辨能谱数据,所得计算值与实验值的标 准偏差是0.124 cm-1。 相似文献
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文内提出一种研究H2O和NO2高激发伸缩振动的U(2)代数模型,在极限条件下,该模型退化为一种非谐和耦合的局域模模型,用该模型的六个可调参数拟合实验数据,算得的标准偏差比相应的非谐和耦合的局域模型算得的偏差要小。 相似文献
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N. K. Sarkar J. Choudhury S. R. Karumuri R. Bhattacharjee 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2009,53(2):163-171
Using the Lie algebraic method the vibrational energy levels of OCS and HCP are calculated for 58 vibrational bands each using
the local Hamiltonian. A comparative study is made between the two. 相似文献
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利用Lie代数方法得到三原子分子的代数Hamiltonian ,通过对光谱数据的拟合确定其展开系数 ,再用相干态得到代数Hamiltonian的经典极限 ,从而得到三原子分子的势能面 .以H2 O分子为例进行了计算 ,其理论值与实验结果一致. The algebraic Hamiltonian for a triatomic molecule can be obtained by using dynamical Lie algebra method (the expansion coefficients are obtained by fitting spectroscopic data). Triatomic molecular potential energy surface (PES) is obtained by using coherent state to take the classical limits of algebraic Hamiltonian. This PES is applied to H 2O molecule, and the deduced force constant is in good agreement with the experimental data. 相似文献
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Iván Calvo 《Letters in Mathematical Physics》2006,77(1):53-62
It has been shown recently that extended supersymmetry in twisted first-order sigma models is related to twisted generalized complex geometry in the target. In the general case there are additional algebraic and differential conditions relating the twisted generalized complex structure and the geometrical data defining the model. We study in the Hamiltonian formalism the case of vanishing metric, which is the supersymmetric version of the WZ-Poisson sigma model. We prove that the compatibility conditions reduce to an algebraic equation, which represents a considerable simplification with respect to the general case. We also show that this algebraic condition has a very natural geometrical interpretation. In the derivation of these results the notion of contravariant connections on twisted Poisson manifolds turns out to be very useful. 相似文献
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Srinivasa Rao Karumuri 《Journal of Molecular Spectroscopy》2010,259(2):86-92
Using the Lie algebraic model, Hamiltonian vibrational frequencies of Copper Tetramesityl Porphyrin and its Cation radicals are calculated for 64 vibrational bands. 相似文献
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An algebraic analysis of the Hamiltonian formulation of the model two-dimensional gravity is performed. The crucial fact is
an exact coincidence of the Poisson brackets algebra of the secondary constraints of this Hamiltonian formulation with the
SO(2,1)-algebra. The eigenvectors of the canonical Hamiltonian H
c
are obtained and explicitly written in closed form. 相似文献