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拟线性粘弹性方程混合有限元分析 总被引:1,自引:1,他引:0
主要讨论拟线性粘弹性方程的Bernadi-Raugel混合有限元方法,给出了逼近解和精确解的收敛性分析.同时,基于积分恒等式技巧导出了超逼近性质,并进一步利用插值后处理技术得到了整体超收敛结果. 相似文献
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一类带有源项的拟线性波动方程的初边值问题 总被引:1,自引:0,他引:1
考虑一类带有源项的拟线性波动方程的初边值问题,利用G a lerk in方法和单调算子方法讨论在混合边界条件下,该问题整体广义解的存在性及衰减性. 相似文献
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The large-amplitude bending motion in CsOH, a ‘classical’ molecule whose microwave spectrum was first recorded in 1967, has been studied ab initio. The three-dimensional potential energy surface has been calculated at the RCCSD(T)_DK3/[QZP + g ANO-RCC (Cs, O, H)] level of theory and employed in MORBID calculations of the rotation-vibration energies and intensities. The ground electronic state is 1Σ+ with the equilibrium structure re(Cs-O) = 2.3930 Å, re(O-H) = 0.9587 Å, and ∠e(Cs-O-H) = 180.0°. The O-H moiety is bound to Cs by an ionic bond and the molecule can be described as Csδ+(OH)δ-. Hence, the bending potential is shallow and gives rise to large-amplitude bending motion. The ro-vibrationally averaged structural parameters, determined as expectation values over MORBID wavefunctions, are 〈r(Cs-O)〉0 = 2.3987 Å, 〈r(O-H)〉0 = 0.9754 Å, and 〈∠(Cs-O-H)〉0 = 163°. Although the averaged structure in the vibrational ground state is far from being linear, the Yamada-Winnewissi-linearity parameter for CsOH is γ0≈-1.0, the value characteristic for a linear molecule. 相似文献
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