Abstract: A method and an apparatus of constructing a chess playing model are disclosed, method includes: acquiring a video image of each chess player; determining a two-dimensional position information for a first expression characterization point in the video image and a marking information for a facial structure characterization point in the first expression characterization point; determining a rotation information for each chess player in a specified direction; reconstructing a three-dimensional reference face model of each chess player so as to generate a three-dimensional target face model of the chess player; reconstructing a three-dimensional target chess player model of the chess player; reconstructing a three-dimensional target chess game model; and reconstructing a three-dimensional target chess playing model.

Abstract: The invention relates to a tank used in an engine cooling system, the engine cooling system, and a work machine. The tank includes a housing and a partition which dividing the housing into an exhaust tank and an expansion tank which are sealed from each other. The exhaust tank includes a first connecting pipe and a second connecting pipe, the first connecting pipe being adapted to be fluidly connected to an engine cylinder jacket of the engine cooling system to introduce coolant into the exhaust tank, and the second connecting pipe being adapted to be fluidly connected to a heat exchanger of the engine cooling system to discharge the coolant into the heat exchanger. The expansion tank includes a third connecting pipe adapted to be fluidly connected to the engine cooling system.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for optical switching. An optical switch device includes a first multicast switch unit; and a second multicast switch unit, wherein each of the first and second multicast switch units respectively include: multiple optical input ports; multiple optical switches; multiple optical splitters/combiners; and multiple optical output ports.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for optical switching. One of the optical switches includes a plurality of optical fibers positioned in an array, the plurality of fibers including one or more input fibers and a plurality of output fibers; a microelectromechanical (MEMS) mirror configured to controllably reflect light from an input fiber to a particular target output fiber of the plurality of output fibers, wherein a position of the MEMS mirror is controllable to switch from a first target output fiber to a second target output fiber of the plurality of output fibers according to a switch trajectory that does not traverse over any other fiber of the plurality of fibers.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for optical switching. One of the optical switches includes a plurality of optical fibers positioned in an array, the plurality of fibers including one or more input fibers and a plurality of output fibers; a microelectromechanical (MEMS) mirror configured to controllably reflect light from an input fiber to a particular target output fiber of the plurality of output fibers, wherein a position of the MEMS mirror is controllable to switch from a first target output fiber to a second target output fiber of the plurality of output fibers, and wherein the position of the MEMS mirror is controlled using a vertically staggered comb drive.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for optical switching. An optical switch device includes a first multicast switch unit; and a second multicast switch unit, wherein each of the first and second multicast switch units respectively include: multiple optical input ports; multiple optical switches; multiple optical splitters/combiners; and multiple optical output ports.