Study on competition between zoysia and over-seeded perennial ryegrass in north transitional climatic zone

To conduct research into development plan of oil displacement by hot water injection in Sabei intermediate zone,Daqing oil field, with mathematical model of high pour point crude,the result shows that to develop high pour point oil reservoir by injection of hot water is better than that of cold water, and thus solves the problem of pressure jump caused by wax precipitating near the injector.

With uranium ore deposits in the Southeast China Diwa region as examples, this paper demonstrates an ore forming model on"trinity" of transition bed(lithology), structural transition zone and transition period of diwa stage, and primarily discusses its significance in prospecting for mineral deposits.

According to the actual behavior of flexible pile,the transition zone is established between the pile and soil.

The key idea is that forwarding node selects the neighbor node whose distance to sink node is the least and less than himself in the radio range excluding transition zone.