Based on this model,we analyze the effects of the change of wave height,wave′s incident angle,bottom friction coefficient and topography on rip current,and some useful conclusions are reached.

When the wave propagates toward the coastal area, it changes greatly for the influence of tide and the sea bottom, finally it breaks in the surf zone and contributes the longshore current and rip current.

Based on 3-dimensional hydraulic fracturing model and the similarities between fluid flow in limited entry fracturing process and electricity current flow in circulation circuit,a numerical model was developed to compute the injection reallocation rates in different layers.

Single well zonal earth stress and rock mechanic parameters are calculated for limited entry fracturing in Well Bin670 and for determination of the extreme injection pressure in block Bin660-665.

In order to solve this problem,a research of limited entry fracturing technology for horizontal wells has been fulfilled,and a successful field experiment of fracturing and associate techniques was done in Well Niuping 10-12,in which 4 perforated intervals were stimulated in large scale,the initial flow rate of the well after fracturing was 7.

Discussion of jet splitting during electrospinning process;

The high-speed camera,scanning electron microscope and universal tensile machine were used to examine the jet splittings,the morphology and the mechanical property of resultant mats.