Starting with the basic equation of the hydraulic system this paper deals with the mechanism modeling for double triangle boom luffer and its hydraulic system.
The ANN starts with simulating cerebric visual thought, and it has wide application foreworld for geological information of underground engineering,taking on strong buzzing, fuzziness, nonlinear.
Starting from the summery, economic development foundation and incorporative development of Jing-jin-ji area, the paper makes 6 policies for the regional economic development of the area.
Beginning with the basic concept and definition of version, bibliology and version of piano sonata literature, the subject will be collated to the category of bibliology.
Air hole, burnthrough, cooapse and welding crackle occurred in the fixed overhead weld for aluminium and aluminium alloy tubes, above all the small-size thin wall tube.