## Comparison of Linear Distributed-Parameter Filters to Lumped Approximants Optimal distributed-parameter filters are commonly implemented using approximating lumped Kalman filtering theory. The effect of such an approximation is investigated. A theoretical development shows that there is a loss
Comparison of two linear approximations to vibronic coupling
β Scribed by Marek Z. Zgierski; Alvin P. Penner
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- English
- Weight
- 247 KB
- Volume
- 45
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
β¦ Synopsis
Two commonly used linear approximations for vibronic coupling in molecules are mvestigated. It is shown that one leads to physically unacceptable potentials if the coupling is not evtrcmely weak while the other leads to well-behaved, but anharmonic, adiabatic potentials.
π SIMILAR VOLUMES
The one and two-photon spectra of the lowest electronic states of pyrimidine are analyzed by means of response theory calculations. Particular attention is paid to the lower onsphoton forbidden (nrt') 'A2 andonaphoton allowed (r&) 'Bi and 'B2 states. Despite being electronically allowed it is found
Siie vibronic Ieve fb~orescence spectra of pyrazine4t~ and 44 are reported and the intensity distriiutions of tile Ione btg mode in these spectra are analyzed in terms of a vibronic coupling model.
A simple coupled harmonic oscillator model is used to test the SCF and adiabatic approximations for coopled-mode sydems. Both approsbnations are quite good; both fair when the unperturbed frequencies of the two modes approach degeneracy. Whiie for two-mode systems the approximations are roughly COmp