Abstract: Provided are a method and apparatus for compressing a neural network model by using hardware characteristics. The method includes: obtaining a target number of output channels of a target layer to be compressed, from among layers included in the neural network model that is executed by hardware; adjusting the target number of output channels to meet a certain purpose, based on at least one of a first latency characteristic for output channels of the target layer and a second latency characteristic for input channels of a next layer, according to the hardware characteristics of the hardware; and compressing the neural network model such that the number of output channels of the target layer is equal to the adjusted target number of output channels.

Abstract: Disclosed herein is a Wavelength Division Multiplexing (WDM) Passive Optical Network (PON) system having a dual central office. The WDM PON system is configured to guarantee system stability by employing a plurality of central offices on a ring type optical communication line and allowing another central office to assume control when a problem occurs in one central office, and further to appropriately compensate for various types of loss caused by various environmental factors, such as insertion loss caused by interfacing various devices with a ring type optical communication line and loss caused by the degradation of an optical cable.

Abstract: The present invention relates to a ring type optical transmission system having a redundancy structure, which employs Wavelength Division Multiplexing (WDM).

Abstract: The present invention relates to a Wavelength Division Multiplexing (WDM) Passive Optical Network (PON) system and a multi-ring type WDM PON system. The WDM PON system is implemented to appropriately compensate signals that are transmitted and received between an optical communication line and the multiplexer/demultiplexer of a Central Office (CO). A plurality of ring-type optical communication lines is employed in the WDM PON system. Accordingly, various types of loss caused by various environmental factors, such as insertion loss caused by interfacing a variety of devices with an optical communication line and loss caused by the degradation of an optical cable, are compensated for, thus improving the quality and stability of communication.

Abstract: Disclosed is a ring type wavelength division multiplexing (WDM) passive optical network (PON) system using the same wavelength for forward and backward channels while inexpensively implementing a redundancy function, and a switching media converter usable in the ring type WDM PON system. The WDM PON system provided a redundancy function to each node, so that the central office of the system can have a simplified architecture. Accordingly, there is an advantage in that the construction costs of the central office can be reduced. And, the network construction costs can be minimized because it is possible to provide a desired redundancy to a part of the nodes, taking into consideration the significance of each node.