Scalable public key broadcast encryption scheme for stateless receiver;

Identity based broadcast encryption without pairings;

New dynamic access control scheme and applications in broadcast encryption;

Research and development of precision seeding intelligent monitor;

Development of Automatic Compensation Monitor System of Precision Seeding-Machine;

In view of that,we suggest to research and develop an automatic precision seeding system with AT89S52 SCM as core.

The precision planting is an advanced planting method, a necessary way to achieve agricultural modernization and also an important step to increase crop yield, income, and decrease cost of grain production.

The precision planting is an advanced planting method, a necessary way to achieve agricultural modernization and also one important of steps to increase crop yield, income, and decrease cost of grain production.

The precision planting is an advanced planting method, a necessary way toachieve agricultural modernization and also one important of steps to increase cropyield, income, and decrease cost of grain production.

Effects of seeding density on quantitative characters of oat;

Effects of Sowing Density and Seedling Age on Yield Formation and the Number of Groups in Hybrid Medium Indica Rice " Xin Liangyou 6 ";

Test on sowing density of seedy lotus in swamp soil zone of Honghu lake;

The application amount of nirtrogen, the propotion of the nitrogen in base fertilizer and the sowing density of rice dry planting were studied by rotational design of the quadratic regression with three experimental factors.