yield surface
3.The same homogeneous dam with 100 m height was calculated using Duncan E B and double yield surface models, the results is that the distributions of displacement and stress of rockfill body are same, but the values of displacement and stress of Duncan model are lager than double yield surface one.
5.The yield surface theory, hardening rules and stress-strain relations of GPM are given. Based on the decomposition of stress increments, a GPM including the rotation of principal stress axes can be established, and the plastic deformation caused by the rotation of principal stress axes can also be calculated.
7.Based on electrostatic film posting technology, a thin self supporting aluminium film is fabricated for the first time. Measurements have been made of the backscattering coefficient and secondary electron yield on the electron incident surface, the transmission coefficient and secondary electron yield on the exit surface of a 50nm thick self supporting aluminium film.
8.At first, the suppositional mechanism for propane ammoxidation was suggested based on the adaptability theory of catalyst surface group-structure. It showed that the catalysts for design with good ACN yield should possess the adaptable surface groups constituted with dehydrogenation centers, oxygen-supplying centers and cyaniding centers with adaptable activity and number corresponding to the required mechanism of reaction.
10.The result showed that the effect of different sowing dates on total growth period, grain yield, plant height and the height from soil surface to the first ear were more significant than that on the number of leaves per plant and the ratio of the height from soil surface to the first ear to plant height.
