Aim In order to find a way to prognosticate the region selectivity in the O methylation reaction of erythromycin and its derivatives, conformation search model of Hyperchem Pro 6 0 used in personal computer was used to establish it.

Then main methods and algorithms involved in side-chain constructing and loop-region constructing of homologous protein are discussed,and major algorithms that are concerned in conformation search of unhomologous protein are analyzed and compared.

The following article introduces the new techniques that are applied in field sequential color display of the view finder in cameras.

To eliminate the rent-seeking phenomenon in the area of taxation and build up good taxation environment, we must handle affairs according to laws and take scientific and all-sided treatment.