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煤田勘探阶段设计钻孔非取芯段设计注意事项研究
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作者 郝琴华 《煤炭与化工》 CAS 2023年第10期69-72,共4页
为了加快砀山煤田勘探进度,对勘探阶段的部分设计钻孔采取部分非取芯钻进方式。根据多年来的勘查经验,在皖北砀山煤田勘探中对钻孔非取芯段的设计进行研究。研究表明,设计非取芯钻孔时,需要熟悉该区的地层层序和煤层赋存状态、重要标志... 为了加快砀山煤田勘探进度,对勘探阶段的部分设计钻孔采取部分非取芯钻进方式。根据多年来的勘查经验,在皖北砀山煤田勘探中对钻孔非取芯段的设计进行研究。研究表明,设计非取芯钻孔时,需要熟悉该区的地层层序和煤层赋存状态、重要标志层和煤层的间距、断层、覆盖层厚度等一系列问题,再参考设计钻孔所在勘探线上前后2个钻孔中的信息,以及左右勘探线上相邻钻孔信息,才能对非取芯段进行精准设计。 展开更多
关键词 煤层 标志层 地层层序 间距 覆盖层 非取芯段
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Analysis of fabrication results for 17×17 polymer arrayed waveguide grating multiplexers with flat spectral responses 被引量:1
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作者 秦政坤 于跃 +4 位作者 宋佳 张会萍 王国峰 孙永欣 汪玉海 《Journal of Semiconductors》 EI CAS CSCD 2013年第9期82-85,共4页
Based on transmission theory, a 17 x 17 polymer arrayed waveguide grating (AWG) multiplexer para meter optimization is performed, and the influence of the fabrication results on the transmission characteristics are ... Based on transmission theory, a 17 x 17 polymer arrayed waveguide grating (AWG) multiplexer para meter optimization is performed, and the influence of the fabrication results on the transmission characteristics are analyzed. In this paper, we mainly discuss three of the main errors in the fabrication of polymer AWG devices. One is 3n 1, which is caused by the tuning of the core refractive index n 1, the second is 8b, which results from the rotating-coating of the core thickness b, and the other is the non-ideal core cross-section, which is caused by steam redissolution. The effects of the above fabrication errors on the transmission characteristics of the AWG device are investigated, and compensation techniques are proposed. By comparing the theoretical simulation and experimental results, the shift in the transmission spectrum is reduced by 0.028 nm, the 3 dB bandwidth is increased by about 0.036 nm, the insertion loss is reduced by about 3 dB for the central channel and 4.5 dB for the edge channels, and the crosstalk is reduced by 1.5 dB. 展开更多
关键词 arrayed waveguide grating flat spectral response fabrication errors non-ideal core cross-section transmission spectrum
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