A rear-view mirror assembly 10 is provided, including a housing 12 and a reflective surface 14. In one embodiment, an apparatus for cleaning at least one airfoil within a turbine compressor, includes: a hose for applying cleaning material to the at least one airfoil; and an articulation assembly for articulating a nozzle of the hose, the articulation assembly including: a main shaft attached to the hose at a first end; and an articulating trigger for rotating the first end of the main shaft. When the fiber for the sensor system is broken, sensing signals are discriminated in different paths provided by the network nodes to avoid stop working once the fiber is broken, by which the self-healing ability of the system is greatly improved.