The results showed that: collapse depth, volume contractive rate and collapse factor of the heartwood gradually decrease in the stem height direction, collapse factor is bigger in the middle of the total-tree height.

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.

A new fit equation with two variables for compressibility factor data of supercritical carbon dioxide was proposed in this article.

The compressibility of gas isn't related to the compressibility factor directly.

With the experimental values of thermal pressure coefficients of liquids to modify the excluded volume in the original van der Waals equation, an augmented van der Waals compressibility factor applicable to high density fluids is obtained.