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Pilot scale experiments were carried out to find the principle of potassium permanganate composite (PPC) pre oxidation enhanced coagulation for pollutants removal in low turbidity surface water during low temperature season. The results showed that significant enhanced coagulation effect can be achieved with PPC pre-oxidation. Furthermore, the small molecule organics were analyzed in this research...
Experiments were conducted for enhancing organic pollutants and turbidity removal of polluted raw water by potassium permanganate composite (PPC). The effect of oxidants' dosing point on pollutants removal efficiency were discussed. The results indicated that PPC adding after rapid mixing period in coagulation process would cause positive effect.
The paper introduces the common failure mechanisms and their effect on the Plastic Encapsulated Microcircuits (PEMs). During the reflow soldering procedure, delamination between plastic mold compound/die or plastic mold compound/lead frame interface occurs frequently. Delamination is the channel for vapour to inbreak into the PEMs and affects its reliability. In this paper, the author analyses the...
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