solid wastes generating electricity,which is on technology and policy,must adhere to'technological policy for treatment of municipal solid wastes and its pollution control',on investment,adopt homemade equipment to reduce cost,on management,must formudate form complete policy and perfect mechanism .

Sand production mechanism,control factors and technical strategy of sand control in heavy-oil reservoir:based on the sand control practice in heavy-oil reservoirs of Liaohe oilfield;

On the ecological environment status in the source area of Yangtze River and Yellow River and its control countermeasure;

Resistance of Musca domestica and its control countermeasure in Anyang city;

Occurrence status and control countermeasure of Bemisia tabaci;

Study on Prevention and Countermeasure of Nitrogen Trichloride Fire Explosion;

Study on Geological Hazards Due to Mining Subsidence and their Countermeasures in Mining Area;

Mechanism Analysis and Countermeasures on Partial Wear and Corrosion of Pumping Well in Bonan Oilfield;