New existence results are presented for the singular second-order nonlinear boundary value problems u' + g(t)f(u) = 0, 0 < t < 1, au(0) - βu′(0) = 0,γu(1)
Based on the hydrodynamics, the airflow exciting-vibration force of control stage of steam turbine is studied by using the momentum theorem. A formulation for c
Any composition sequential mapping, periodic composition mapping of a complete non-empty metric space M into M with geometric mean contraction ratio less than 1
Constitutive theory of plasticity coupled with orthotropic damage for geomaterials was established in the framework of irreversible thermodynamics. Prime result
Based on the mathematical model of a kind of complicated financial system, all possible things that the model shows in the operation of our country's macro-