In thesis, key epidemic links including germination of spores, spore production oflessions, incubation period and the rate of symptom appearance, spore spread, spacedistribution model, the resistiance to the pathogen of diffirent cultivars and fungicidescreening for tomato leaf mould caused by Fulvia fulva (Cooke) cir.

Experimental study on rheological property for cement slurry and numerical simulation on its annulus flow;

In order to study the flow characteristic of eccentric annulus flow or other fluids,annular flow experiment devices have been constructed and designed,and particle distribution,speed field and speed distribution of the annulus fluid field have been measured by the technology of PIV(Particle Image Velocimeter),the flow properties of annular field and velocity distribution has been analyzed.

Support has been provided for that annulus fluid instances were numerical simulated with PHOENICS,PHOENICS is used to set up a numerical model of power-law fluid in a concentric annulus flow,by comparing the numerical simulation results for the axis velocity of the power-law fluid in a concentric annulus flow with two dimensional PIV experimental results.

3-D numerical simulation on round negative buoyant vertical jets in flowing environment;

Numerical simulation on near-field behavior of plane negative buoyant jets in flowing environment;