A coupling numerical method without time-lag is established by sub-iterative solving the fluid dynamics equations and the rigid-body dynamics equations synchronously in order to predict the onset and the development of uncommanded motions and then explore the unsteady movement characteristics of aerocraft.

By sub-iterative synchronous solution of fluid dyna mi cs equations and rigid-body dynamics equations,a coupling numerical method is p roposed to explore the unsteady movement characteristics of aerocraft and to stu dy the unsteady multi-freedom connected movements about a slender delta-wing.

Improved iterative compensation method for diffraction in SAW filters;

A fast iterative algorithm for very large Fibonacci numbers;

Curvilinear synthetic aperture radar iterative algorithm;

High-precision and fast square root algorithm based on Newton iteration method;

An iteration method to seek the matrix inversion;

Finite element iteration method for stability safety factor of known sliding surface;

Error grade iterative method of BP neural networks;

While seeking maximum flux on pipeline , we must consider the infection of pumps with each other, and use the iterative method.

The perturbation vector of original structure is processed by the Padé approximation to get the increasing perturbation solution of the transitional structure, and to achieve an accurate result with iterative method, furthermore, the combination of the results.