In the process of treating the micro-contaminated yellow river water with powder activated carbon,the efficiency is obviously different from various dosing points.

According to the quality of micro-polluted raw water from Nanjing section of Yangtse River,the suitable kind of powdered activated carbon,dosage and dosing point are determined by jar test to provide a basis for adding powdered activated carbon in waterworks.

Pre-heating the material and the air,setting flowmeter and alarm fitting in the air pipe of chlorine production,improving the pipes design,adding the chlorine multi-points dosage and cutting off light in reaction,sedimentation and filtration process are put forward in order to improve the yield of chlorine,process stability,security of the chlorine production and decline the degradation rat.

To Establish an Automatic Coagulant Addition System of Water Works by Mathematical Model;

The processor uses either a cooperating mode or a separate mode to support not only several elliptic curve digital signature algorithms,but also scalar multiplication,point addition and point verification.

For improving the hardware efficiency of the pipeline and systolic dual modular multiplier, this thesis rearranges the operation sequence, then makes point addition need 7 modular multiplication cycles and point doubling need 4 modular multiplication cycles.

The next investment highlight of nonferrous metals industry-downstream processing industry;