For the need of loading on Passanger Ro-Ro ship, the mechanics equilibrium equation of ship floatation is used to propose the calculation method of add-weighting with step by step.
The static equilibrium equation for the Cabin Supporting Structure is solved by iteration, which could make the six cables loaded very closely.
The canopy under inflation is regarded as a soft shell, and the equilibrium equations in the radial member and gore centerline are established by mechanics theorems.
The equilibrium equation of surrounding rock mining fault system is established. The fault destablizing process with shear failure pattern belongs to fold catastrophe model.
By analysising the DO of biological floating bed system, we have built the dissolved oxygen equilibrium equation.
