摘要:
The present invention relates to communications technologies, and discloses a method for monitoring the state of a fiber line, a repeater, and a submarine cable system. The repeater includes a first optical amplifier (OA), a second optical amplifier, a first gating unit, a second gating unit, a first coupler, a second coupler, a third coupler, and a fourth coupler. The first coupler, the fourth coupler, and the first gating unit form an in-to-in loopback path between the input end of the first OA and the input end of the second OA; and the second coupler, the third coupler, and the second gating unit form an out-to-out loopback path between the output end of the first OA and the output end of the second OA.
摘要:
Provided are fusion proteins which comprise a first region having at least 75% homology with the amino acid sequence of neurotrophin, and a second region, located at the C-terminal of the first region, having at least 75% homology with the amino acid sequence of protein transduction domain (PTD). Also provided is encoding gene and usage thereof. The fusion protein can translocate through cell membrane or even the blood-brain barrier (BBB). The fusion protein can be used to treat various central nervous system degenerative diseases and peripheral neuropathy.