Concept of honor is based on certain historical conditions and social relations, while guiding people to foster a correct world Outlook and Outlook on life and at the same time constrained by a world Outlook and Outlook on life. The shipping industry is an important window for the international society of China, crew's mental Outlook reflects the image of the Chinese nation. In maritime activities, the crew can properly establish the concept of honor, not only affecting their own scientific Outlook on life and values, indicating, Also determines the speed of shipping industry development in China and the success or failure of international political, economic and cultural exchanges.
We employed the generalized energy-based fragmentation (GEBF) approach to investigate the gas-phase structures of B-DNA double-helices up to 10 base pairs at several theoretical levels. By comparing the results obtained using the M06-2X functional and other methods (including the B3LYP, B3LYP-vdW, and TPSS functionals), we found that the absence of stacking interactions could lead to the enlargement of the vertical distance between adjacent bases. The magnitude of this enlargement of the vertical distance quickly decreases as the length of the double-helix increases. The gas-phase stabilization of the double-helical structure of B-DNA is a cooperative effect, in which hydrogen bonding plays a more important role than stacking interaction does up to 10 base pairs.
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