Some interesting research areas of pulp and paper science and technology proposed by the scientists in USA,including fiber en-gineering,fibrous fillers,single stage bleaching,one-way press and compact integrated recovery system,are introduced in the paper.

Study of the FRC-2 Single-stage Hydrocracking Catalyst Reacting Performance;

In AutoCAD,we can utilize the speciality of rulesurface to numerically sheet a single pipeline which shape of both sides are different,and realize that the shape and position of both sides are arbitrary.

Based on the characteristic of a short-time non-stationary random signal, the feature of energy distribution of a single deck blast vibration signal is investigated by means of wavelet packet method.