The exact monotone twist map of infinite cylinders in the Birkhoff region of instability is studied. A variational method based on Aubry-Mather theory is used t
The β-delayed proton precursors 125Nd, 128Pm, 129Sm, 137Gd and 139Dy near the proton drip line were produced by the irradiation of 92Mo, 96Ru and 106Cd with an
Distributions and geochemical significances of 18a (H)-neohopanes and of 17a (H)- diahopanes in oils from west Xialiaohe depression of the Bohai Bay Basin have
Two kinds of novel fluorescent hyperbranched polymers were synthesized by the end-capping approach.The fluorescent hyperbranched polyether (FPEOTM) was obtained