Abstract: Disclosed are a method for a reader to provide a service, a reader and a computer storage medium. The method includes: obtaining and displaying, by a reader, at least one piece of plugin information, the plugin information including at least a plugin name; determining plugin information selected by a user from the at least one piece of plugin information, and downloading a corresponding plugin file according to the selected plugin information; and installing a plugin according to the downloaded plugin file, and invoking the plugin installed to provide a corresponding service. By enabling the reader to download a corresponding plug-in file according to plug-in information selected by a user, i.e., downloading the corresponding plug-in file according to the user's needs, the size of a reader installation package in the present disclosure can be controlled effectively, thereby saving traffic.

Abstract: The present disclosure relates to a music playback method, a third-party application and a device which are in the field of computer technique. The music playback method includes integrating a background music playback module into a third-party application, receiving a music playing signal in which a playlist identification is included, transmitting the music playing signal to the background music playback module through a predetermined port, acquiring by the background music playback module a corresponding playlist based on the playlist identification of the music playing signal, and randomly playing the music in the playlist by the background music playback module.

Abstract: This invention discloses a bend insensitive single mode fiber, which is composed by a bare glass fiber with a round cross section and two resin protective layers with circular cross sections surrounding the outer of the bare glass fiber. It is characterized in that the bare glass fiber is composed by a core layer with a round cross section and two claddings with circular cross sections. The refractive index of the core layer is higher than the index of the two claddings and the refractive index difference between the core layer and the first cladding is larger than the difference between the first and second claddings. The second cladding is made of pure SiO2. The refractive index profile of the core layer follows a power function, and the refractive index profile of the two claddings follow a ladder-type distribution. The loss of the invented fiber is insensitive to the bending of the fiber, which meets the requirements of ITU.T G.657.A and G.657.B standards, respectively.

Abstract: This invention discloses a bend insensitive single mode fiber, which is composed by a bare glass fiber with a round cross section and two resin protective layers with circular cross sections surrounding the outer of the bare glass fiber. It is characterized in that the bare glass fiber is composed by a core layer with a round cross section and two claddings with circular cross sections. The refractive index of the core layer is higher than the index of the two claddings and the refractive index difference between the core layer and the first cladding is larger than the difference between the first and second claddings. The second cladding is made of pure SiO2. The refractive index profile of the core layer follows a power function, and the refractive index profile of the two claddings follow a ladder-type distribution. The loss of the invented fiber is insensitive to the bending of the fiber, which meets the requirements of ITU.T G.657.A and G.657.B standards, respectively.