In this paper, the author define a kind of relative Z p index using the theory about Z p index, and studies the existence of multiple Sub brake orbits for the Hamiltonian system on starshaped energy surface using the relative Z p index, the author also improves the result obtained by Szulkin.

Supposing the support concrete of the sluice gate track to be a quarter infinite body loaded by a uniform force, its approximate solution is obtained by elastic mechanical method.

In this paper, the hoisting program for the track beams of bridge crane over the permanent ship lock in the Changjiang Gorges hydraulic engineering is studied in detail, and based on it, the hoisting construction is conducted successfully.