Abstract: Device and methods for real-time polarization-dependent loss monitoring at coherent transceivers. In one embodiment, there is provided a method of monitoring a polarization dependent loss (PDL) of a signal during transmission through an optical communication link, the method comprising: receiving the signal by a coherent receiver, the received signal being subjected to one or more impairments in Amplifier Gain Control (AGC) mode, the one or more impairments including PDL; estimating an AGC gain effect of the AGC mode; compensating for the AGC gain effect in the received signal; determining the PDL from the compensated signal; and reporting the PDL.

Abstract: A boiler has a tank, a hearth contained in the tank, a gas pipe having one end in communication with a gas exit of the hearth and the other end passing through the hearth, a combustor in communication with a bottom of the hearth, and a fuel supply device being connected to a fuel inlet of the combustor.

Abstract: An anti-scorification oven having a combustor, a hearth in communication with the combustor, an ignition bar in the combustor, a feed pipe in communication with a fuel inlet in the combustor, a feed rotor contained in the feed pipe, a spiral sector formed on the feed rotor, an ash rotor in the combustor and being connected to the feed rotor, the ash for having an ash sector formed on a distal end thereof and a plurality of scorification breaking nails formed on a proximal end thereof, and, an air channel in communication with a plurality of air supply holes defined in the combustor.

Abstract: A fireplace has a hearth having an upper and a lower air supply openings, an upper and a lower deflectors, a first air supply channel being defined by the upper deflector and a door of the fireplace, the first air supply channel being in communication with the upper air supply opening and has an outlet facing a bottom of the hearth, the lower deflector having a concave surface facing a back wall of the hearth, a second air supply channel being defined in the back wall of the hearth, the second air supply channel being in communication with the lower air supply opening, and a plurality of air supply holes.

Abstract: An anti-scorification oven has a combustion chamber having an ignition bar. A first feed rotor is provided in the combustion chamber and having one spiral sector at each end and a plurality of scorification nails in a middle thereof. A first motor is connected to the first feed rotor. A hopper is in communication with the feed inlet of the combustion chamber. A second feed rotor has a spiral sector thereon. A second motor has an output connected to the second feed rotor. A hearth is above and in communication with the combustion chamber.

Abstract: A flame imitation manufacturing device of a fireplace relates to a flame imitation manufacturing device for simulating the burning state in a fireplace in the field of household appliances. Said device comprises a housing, a cross flow fan and a light source mounted on a base plate of the housing, a simulated fire chamber mounted on a back plate of the housing, ribbons mounted on the back plate of the housing by means of upper and lower strip bars and above the cross flow fan, and a light-transmitting glass plate mounted on the housing and in front of said ribbons. This invention, characterized in that said cross flow fan is a swinging one, is advantageous in that supplying wind non-directively by utilizing the swinging of said fan improves the flying state of ribbons so as to make the image state of burning flames more vivid, greatly enhances the authenticity of flames and lowers the cost thereof, and thus is adaptable to various flame imitation electrical-heated fireplaces and electrical appliances.

Abstract: A flame imitation manufacturing device of a fireplace relates to a flame imitation manufacturing device for simulating the burning state in a fireplace in the field of household appliances. Said device comprises a housing, a cross flow fan and a light source mounted on a base plate of the housing, a simulated fire chamber mounted on a back plate of the housing, ribbons mounted on the back plate of the housing by means of upper and lower strip bars and above the cross flow fan, and a light-transmitting glass plate mounted on the housing and in front of said ribbons. This invention, characterized in that said cross flow fan is a swinging one, is advantageous in that supplying wind non-directively by utilizing the swinging of said fan improves the flying state of ribbons so as to make the image state of burning flames more vivid, greatly enhances the authenticity of flames and lowers the cost thereof, and thus is adaptable to various flame imitation electrical-heated fireplaces and electrical appliances.