implicit parameter
1.A CLASS OF ADAMS IMPLICIT METHODS WITH STABLE PARAMETER AND A NEW ALGORITHM
2.Based on the subdomain precise integration method, a class of three|level explicit schemes containing parameter a>0 and a class of two|level implicit schemes containing parameter a>0 for the initial|boundary value problem of convection equation are presented. Their local truncation e rrors are respectively O(a Δ t+ Δ t 2 +Δ x 2) and O (a Δ t +Δ t +Δ x 2).
3.Aiming at the producing character which the unlike material compound sucker rod is extensively used in deep well, the numerical solution method of system simulation model have been founded which include the change step display and implicit difference numerical solution, combining two difference numerical solution to solve the wave equation quickly, Compared the simulation and actual measurement dynamometer card, the result dovetail with actual status, comparative analysis the impact of differ well fluid viscosity to suspended center dynamometer and systems dynamics parameter.
