Abstract: An image decoding method and an image decoding apparatus is provided. The method comprises recovering a first motion vector corresponding to a first decoding reference picture based on the entropy decoded bit stream, calculating a second motion vector corresponding to a second decoding reference picture by scaling the first motion vector based on a first temporal distance between the current picture and the first decoding reference picture and a second temporal distance between the current picture and the second decoding reference picture, generating a prediction block relating to a current block in the current picture, based on the calculated second motion vector, generating a residual block relating to the current block through a residual data decoding process based on the entropy decoded bit stream, and recovering the current block based on the prediction block and the residual block.

Abstract: The present disclosure provides a system and a method for purging the condensate water and hydrogen of a fuel cell stack, which may allow the condensate water and hydrogen discharged from a stack to be directly bypassed to an exhaust line of a humidifier rather than a shell side of the humidifier to be purged to the atmosphere according to the operation state and operation condition of the stack, thereby solving a problem in that an inverse voltage is generated upon cold operation of a fuel cell system, a flooding phenomenon occurs in the stack, or the like to improve the operation stability of the stack and the operation efficiency of the fuel cell system.

Abstract: The present disclosure provides a system and a method for purging the condensate water and hydrogen of a fuel cell stack, which may allow the condensate water and hydrogen discharged from a stack to be directly bypassed to an exhaust line of a humidifier rather than a shell side of the humidifier to be purged to the atmosphere according to the operation state and operation condition of the stack, thereby solving a problem in that an inverse voltage is generated upon cold operation of a fuel cell system, a flooding phenomenon occurs in the stack, or the like to improve the operation stability of the stack and the operation efficiency of the fuel cell system.

Abstract: The present invention relates to multicolor colloidal particles coated with a metal nanoparticle mixture having colors in the visible region and a method for preparing the same. In particular, relates to a metal nanoparticle mixture in which two or more nanoparticles selected from the group consisting of metal nanoparticles exhibiting red color; metal nanoparticles exhibiting yellow color; and metal nanoparticles exhibiting blue color, are mixed in various compositional ratio, multicolor colloidal particles in which polymer or mineral colloidal particles are coated with the metal nanoparticle mixture, and a method for preparing the same. According to the present invention, all colors that are in the visible region can be developed by suitably mixing metal nanoparticles exhibiting three colors, and multicolor colloidal particles can be prepared by coating polymer or mineral colloidal particles with a metal nanoparticle mixture exhibiting various colors.