Ⅰ. INTRODUCTIONSince the DENDRAL system was elaborated by Standford University at the beginning of 1960s, structure elucidation systems have aroused a lot of r
<正> The surface energy of solids plays an important role in the process of fracture. Gc≈2rp=2rsF(x), where F(x) is a function related to dislocation properties.Ca
Land suitability evaluation is fundamental in deciSion-making on land use planning. In 1976, FAO published A framework for land evaluation in which the procedur
<正> Microphase separation in block copolymers with well-defined structure prepared anionically has been extensively studied both in morphology and by statistic
<正> Behaviours of the plasma sheath in low pressure gas discharge have been an interesting and active physical topic. And this problem has a particular signifi
<正> We have studied some color reactions using pyridylazo compounds as chromogenic agents in the presence of anionic surfactant, and established the spectropho
<正> The polymerization mechanism of various vinyl monomers in the presence of aromatic tertiary amines has been studied. It is found that the mechanisms of dif
<正> As the Ianthanide ions are easy to form seven, eight or higher coordination number complexes, the configurations of these complexes are multiformed. The pr
<正> There is a large centrifugal force emerging in a rotor of ultracentrifuge from its rotation and mass. This is the main stress, the principal reason resulti