Objective: To investigate the effects on blastocysts survival and subsequent in vitro and in vivo viability of “artificial shrinkage” before vitrification of mouse expanded blastocysts using cryoloops technique.

Objective:To establish an effective pretreatment method for the vitrification of expanded mouse blastocysts by comparing 3 techniques for the artificial shrinkage of the blastocoelic cavity.

Exploration of mechanics in wood collapse;

Study on Reduction of Collapse of Eucalyptus Wood in Drying;

Methods From July 2001 to September 2003, twenty-two patients (average age 28, 19～36 years old; 18 males and 4 females; 15 right knees and 7 left; 9 from sports injury, 7 from traffic accident and 6 by sprain injury) with symptomatic laxity and confirmed elongation with rupture of structure were operated with bipolar radio frequency thermal shrinkage under arthroscopy.

Based on the investigation of cocoon wrinkles from good silkworm races in different mounting conditions,it is found that the cocoons spun at high temperature and humidity had coarse,disorder and deep wrinkles with low rate of sericin dissolution and poor reelability,but it is contrary for the cocoons spun at proper temperature and humidity.

The fast-marching method was combined with the sourcescanning method to modify the scheme for the Level Set method in unstructured grids,and the problem of small amplitude standing waves was solved by its combination with artificial compression method.

For TVD scheme,a new artificial compression method and a kind of MaxEta method are given.