Amphiphilic octadecapeptides containing 8～9 leucines in the hydrophobic phase wete syn-thesized and shown to self-associ......

介绍了柔性防斜纠斜钻具组合的防斜纠斜机理，给出了其力学模型并进行了分析，提出了其防斜纠斜钻进技术措施。在勃参一井的应用表明，该......

<正>The control of underactuated mechanical systems is very complex for the loss of its control inputs. The model of und......