Studies of the ultraviolet spectra and ab initio calculations have been carried out for vitamin E, p-benzoquinone and their complex in the present work. Steady-state absorption spectra have been experimentally measured with a Shimadzu UV-2100S spectrometer at room temperature. Measured values of maximum absorptions of vitamin E and p-benzoquinone in methanol are in excellent agreement with those reported in reference. In theoretical calculations, face-to-face conformations of the electron donor-acceptor (EDA) complex have been selected. The geometries of EDA complexes have been determined by searching for the energy minimum through the variation of the center to center distance between the isolated optimized geometries of the donor and the acceptor. The electronically excited states have been investigated by means of complete active space self-consistent field method associated with 6-31G* basis sets. The state optimizations of S0 and S1 for EDA complex reveal that the photoexcitation can directly yield an excited charge transfer (CT) state, and the CT absorption arises from the electron transition between two p-type molecular obitals. Based on the approximations of spherical cavity and point dipole, CT absorption in methanol has been investigated by considering the solvent reorganization energy correction.

In this paper the embedded zerotree wavelet (EZW) method and Huffman coding are proposed to compress infrared (IR) spectra. We found that this technique is much better than thers in terms of efficiently coding wavelet coefficients because the zerotree quantization is an effective way of exploiting the self-similarities of wavelet coefficients at various resolutions.

提出了用于红外光谱小波压缩中压缩性能的评价方法。所建立的控制恢复根均方差算法能在给定恢复根均方差的情况下得到压缩比，控制的精度较高，相对标准偏差约为8%，可以满足对恢复谱图的误差估计和最佳压缩参数评价的需要。对于不同的信号，同一小波函数所表现出来的压缩性能也不一样，所以在预控根均方差算法下评价压缩性能时，还应考虑选择有代表性的红外谱图来进行。

Votoserts porplo'rolep#s. Asteraceae. sesquiterpenc lactones, guaianolides, noto-serolides A and B.

针对化学领域中的非线性关系特点，在常规BP网络基础上，提出了一种“杂交”型BP网络，包含两个隐层，并有输入层到输出层的直连接．它可很好地解释数据中同时存在的线性及非线性关系，效果优于多元回归法及普通BP算法。