Abstract: The present invention discloses a method for preparing etodolac methyl ester, and relates to the technical field of organic synthesis. The method provided in the present invention includes the following steps: (1) raw materials are mixed and subjected to cyclization reaction at 20° C. to 25° C. to obtain a reaction solution, where the raw materials include 7-ethyltryptophol, methyl 3-oxopentanoate, trimethylhalosilane and methanol, excluding concentrated sulfuric acid, and the trimethylhalosilane is trimethylchlorosilane or trimethylbromosilane; and (2) the reaction solution is cooled to 10° C. to 15° C., and then filtered to obtain etodolac methyl ester and a mother liquor. The method provided in the present invention has a high yield, and does not use concentrated sulfuric acid that is extremely harmful and tends to cause product oxidation.

Abstract: The disclosure discloses a Generic Mapping Procedure (GMP) mapping method for an Optical channel Data Unit (ODU), including: caching low-level ODUk data to a memory according to the rate of low-level ODUk data stream; generating an adjustment byte in a mapping process and encoding the adjustment byte; generating read enable of the cached data by an algorithm according to the adjustment byte, reading the cached low-level ODUk data, and generating Optical channel Data Tributary Unit (ODTU) data according to the read data; and crossing a time slot of the ODTU data in multiple channels to that of a high-level ODU payload, and forming the data in the time slot of the high-level ODU payload and the encoded adjustment byte into a completed high-level ODU frame. The disclosure may further provide a GMP mapping apparatus for an ODU. According to a technical solution of the disclosure, the GMP mapping of the ODU can be implemented according to the dynamic change of a service rate.

Abstract: The disclosure discloses a Generic Mapping Procedure (GMP) mapping method for an Optical channel Data Unit (ODU), including: caching low-level ODUk data to a memory according to the rate of low-level ODUk data stream; generating an adjustment byte in a mapping process and encoding the adjustment byte; generating read enable of the cached data by an algorithm according to the adjustment byte, reading the cached low-level ODUk data, and generating Optical channel Data Tributary Unit (ODTU) data according to the read data; and crossing a time slot of the ODTU data in multiple channels to that of a high-level ODU payload, and forming the data in the time slot of the high-level ODU payload and the encoded adjustment byte into a completed high-level ODU frame. The disclosure may further provide a GMP mapping apparatus for an ODU. According to a technical solution of the disclosure, the GMP mapping of the ODU can be implemented according to the dynamic change of a service rate.