tracing velocity
1.With the tracing particles,the sinking velocity of middle and higher density particles that pass through the lower density coal particles in jig bed for different jigging air circle were measured.The results showed that the air cycle with a long inlet period can promote the separation of middle and higher density particles and lower density coal particles.
2.Generally, tidal bore is wave alignment moving upstream estuary, and its surface will break when the wave alignment is strong, which leads to water roll tracing the source. The velocity, which is between small-disturbed wave velocities before tidal bore happens and the one after tidal bore happens, increases with the ratio of tidal bore height to the water depth in wave front.
4.The result indicates that the numerical simulation method of calculating concentration by tracing- statistics particles is feasible if advisable diffusion coefficient is obtained,and reasonable computing formula for getting the sediment velocity is applied.
6.The authors established an initial velocity model based on the first break time of the actual data, then realized the forward calculation with the improved shortest path ray tracing algorithm, and applied the improved constrained damped simultaneous iterative reconstruction technique (CDSIRT) to solve large-scale and sparse equations for inversing the near-surface velocity field.
7.We acquired left ventricular systolic (LVSEV) and diastolic end volume (LVDEV), left ventricular ejective fraction (LVEF), the peak velocity of early diastolic (Ev), Ev deceleration time (EDT), the atrial systolic transmitral flow (Av), Ev/Av, transmitral flow tracing (MVTI), isovolumic relaxtion time (IRT), isovolumic contraction time (ICT).
