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针对研究区岩层性质和技术状况,通过钻具的优选和合理级配,以及钻进方法、钻头类型与参数、钻进工艺、操作技术的研究,得出一套提高钻孔钻进速度的技术措施,在研究区软-坚硬互层地层瓦斯抽放钻孔施工中,台月效率比原来提高80%以上。 相似文献
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We propose a scheme for generating a genuine four-particle polarisation entangled state |χ00> that has many interesting entanglement properties and potential applications in quantum information processing. In our scheme, we use the weak cross-Kerr nonlinear interaction between field-modes and the non-demolition measurement method based on highly efficient homodyne detection, which is feasible under the current experiment conditions. 相似文献
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