The re-sult shows that the intensification of Bryophyta layer on soil anti-scourability was remarkable,and this effect strengthened with increasing of the thickness of Bryophyta layer,and weakenedwith inreasing of the scouring slope.

The characteristics of soil anti-scourability and its primary influence factor in different land use types of Purple soil hilly region were studied.

The molecular composition and molecular structure of MBS,CPE and ACR,which were used as the impact modifier of PVC,were analyzed,and their impact modification mechanism were studied as well as their influences on the low temperature impact strength,weather resistence,Vicat softening point and toughness of PVC products.

The analysis on the shock resistance of common fiber concretes;

Micromachined thermal gas angular rate sensor is kind of novel inertial device,which takes an advantage of high shock resistance due to use gas instead of conventionally used proof-mass as the key sensing element.

Study on the improving for the impact resistance of MBS resin;

As can be seen, eutectic structure or stractare close to eutectie state has the besty impact resistance, and hypereutectic structure close to eutectic point has the highest hardness and wear resistance.

After the accelerated curing period, the impact resistance & bonding adhesion of plasters on the sample wall were tested afterwards.