We consider the three-body problem in a generic multiband lattice, and analyze dispersion of trimer states that are made two spin-$\uparrow$ fermions spin-$\downarrow$ fermion due to an onsite attraction between. Based on variational approach, we first obtain exact solution form set coupled integral equations, then reduce it eigenvalue problem. As illustration apply our theory sawtooth numerica...

Highlights The vehicle body leveling control model based on tire stiffness and wheel centroid displacement is established in this article. average pitch angle error 7.94%, the tilt 4.37%. algorithm developed can be applied to automatic of hilly tractors cars. Abstract . system core part attitude mountain tractor. It calculates posture real-time according makes corresponding strategies. accuracy...