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A scheme of automatically phase-locked self-homodyne detection with a low-power pilot-tone is proposed. The performance is experimentally demonstrated by back-to-back 10/20-Gbaud BPSK, 10-Gbaud QPSK and 100km-transmission of 10-Gbaud BPSK with pilot-to-signal power ratio of −30dB.
With the economic globalization and market constantly subdivision, the life cycle of product and the development cycle increasingly shorter. In the development process of new products, more and more scholars have realized that if suppliers collectively participate in the initial stage of product development, enterprises will effectively save the cost and the time, dramatically increase the product...
The most important technology in the process of designing boring machines is the layout of cutterhead. Based on study of disposing cutters on cutterhead of TBM, this paper proposes a method of disposing cutters and programs a TBM analysis and simulation software. It validates the rationality of the layout of cutterhead by calculating cutterhead's bending moment and non-counterbalance.
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