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This paper provides the design of 1 MVA three-phase oil-immersed distribution transformers considering short-circuit testing (SCT) and its impact on the windings. To maintain the transformer function after the SCT, only an impedance variation within 5% is allowed. Therefore, in conjunction with the particle swarm optimization (PSO), a simulation-based optimal approach is developed for the design of...
Coated steel belts (CSBs) are becoming widely used in elevator systems due to their good performance. The reliability and safety of the belts are the most important factors for elevator operation. The difficulties for the belts testing are the small diameter of the rope and high lift-off distance during magnetic flux leakage (MFL) inspection, which will result in a fairly weak signal with low SNR...
The microbial re-growth of the pipe wall biofilm in water distribution system may endanger the safety of drinking water, so it is necessary to research the biofilm microbe. In order to study the diversity and growth of biofilm bacteria, a model pipe network which dynamic simulated the distribution system was designed. The bacteria of the model biofilm were cultivated by using R2A. The results shows...
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