In published papers,there are some problems such as: neglecting the drag force of gas,choosing the improper density and using irrelevantly the drag force formula,so the difference between calculation and practice is large.

The drag force and position of the particle in the filter layer was related by Stokes law in this paper.

The flow over a stationary spherical particle was analyzed numerically to analyze the effect of the turbulent parameters (turbulence intensity and turbulence length scale) on the drag force.

Review of airgun array hanging and towing systems in seismic exploration;

The paper introduces the design,manufacture and implementing situation of the leading cable and hose towing director motion devices in the working face of Datong Coal Mine Group Silaogou Mine to mine the full coal height once and offer some suggestion for reference to administrate the leading cable and hose towing director motion devices for the future.

Optimization and identification on current drag coefficients of isolated ice floe based on experimental data;

At present, two single-function detectors were employed to detect dragging and axial compression perfor- mance of clutch plate respectively, and every detector has machine tool, control system and testing system respec- tively, at home and abroad.

Dynamic simulation for trees swaying in wind based on fractal 3D L system;

Simulation of swaying tree in wind field considering coupling effect;