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For the status that the domestic commercial enterprises' performance appraisal lacks objective quantitative criteria, it established index system of commercial enterprises' performance appraisal in this paper. It used the rough set to make attribute reduction, and distilled the core influencing factors. Then using information entropy to confirm objective index weight, and employing the unascertained...
The aim of the thesis is developing wind power installing equipment with self-determination product, that is two-sides lifting tool of steel tube stake. At first, the mechanism of it was designed and its principle was also expounded. Next, the gripping mechanism composed of hydraulic cylinder and inclined gripping blocks was designed and its force relation was analyzed, so the positive pressure of...
It was found that, in copper electrolyte, the combination of As(V) and Sb(V) can form arsenato antimonic acid (AAAc) and, the reactions of AAAc with As(III), Sb(III), and Bi(III) can produce the precipitates of arsenato antimonates. During copper electrorefining, the As, Sb, and Bi deposited into the anode slime from the electrolyte are dominant in the forms of arsenato antimonates. It is extremely...
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