Abstract: The invention relates to resorcinol-derived compounds of formula (I) and also the salts thereof, the solvates thereof and the optical and/or geometrical isomers thereof, including enantiomers and diastereoisomers, the racemic mixtures thereof, alone or as a mixture. The invention also relates to a cosmetic process for depigmenting, lightening and/or bleaching keratin materials, in particular the skin, using these compounds (I).

Abstract: The invention relates to resorcinol-based compounds of formula (I), to the salts, solvates, optical and/or geometrical isomers thereof, to the use thereof as active agents for depigmenting, lightening and/or bleaching keratin materials, and/or for preventing, reducing and/or treating impairment of the skin complexion or of the colour of the semi-mucous membranes. The invention also relates to a non-therapeutic cosmetic treatment process for depigmenting, lightening and/or bleaching keratin materials, and/or for preventing, reducing and/or treating impairment of the skin complexion or the colour of the semi-mucous membranes.

Abstract: The invention relates to resorcinol-based compounds of formula (I), to the salts, solvates, optical and/or geometrical isomers thereof, to the use thereof as active agents for depigmenting, lightening and/or bleaching keratin materials, and/or for preventing, reducing and/or treating impairment of the skin complexion or of the colour of the semi-mucous membranes. The invention also relates to a non-therapeutic cosmetic treatment process for depigmenting, lightening and/or bleaching keratin materials, and/or for preventing, reducing and/or treating impairment of the skin complexion or the colour of the semi-mucous membranes.

Abstract: The invention relates to resorcinol-derived compounds of formula (I) and also the salts thereof, the solvates thereof and the optical and/or geometrical isomers thereof, including enantiomers and diastereoisomers, the racemic mixtures thereof, alone or as a mixture. The invention also relates to a cosmetic process for depigmenting, lightening and/or bleaching keratin materials, in particular the skin, using these compounds (I).

Abstract: A distributed optical fiber disturbance positioning system based on the asymmetric dual Mach-Zehnder interference, unlike traditional dual Mach-Zehnder distributed optical fiber disturbance sensing system, the present invention adopts two narrow-bandwidth optical sources (1a, 1b) and adopts corresponding DWDM (3a, 3b) before the detector (4a, 4b) to filter the backscatter noise of the optical fiber, and can solve the problems of having too low SNR due to backscatter influence when the sensing distance is long. The present invention also provides a positioning method for applying the system, which obtains the TFD of the disturbance frame signals by using the time-frequency analysis method based on the short-term average frequency, and takes the points near the point of maximum frequency as the effective signal segment for performing cross-correlation time delay estimation, thus obtaining the delay, and the disturbance position.

Abstract: A distributed optical fiber disturbance positioning system based on the asymmetric dual Mach-Zehnder interference, unlike traditional dual Mach-Zehnder distributed optical fiber disturbance sensing system, the present invention adopts two narrow-bandwidth optical sources (1a, 1b) and adopts corresponding DWDM (3a, 3b) before the detector (4a, 4b) to filter the backscatter noise of the optical fiber, and can solve the problems of having too low SNR due to backscatter influence when the sensing distance is long. The present invention also provides a positioning method for applying the system, which obtains the TFD of the disturbance frame signals by using the time-frequency analysis method based on the short-term average frequency, and takes the points near the point of maximum frequency as the effective signal segment for performing cross-correlation time delay estimation, thus obtaining the delay, and the disturbance position.