Autor: Bo, G. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Flotation separation of chalcopyrite from talc using carboxymethyl chitosan as depressant
Autorzy:: Qian, G.
Bo, F.
Danping, Z.
Jujie, G.
Powiązania:: https://bibliotekanauki.pl/articles/110249.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: talc
chalcopyrite
flotation
separation
carboxymethyl chitosan
Opis:: Flotation separation of chalcopyrite from talc using carboxymethyl chitosan as a depressant was studied. Flotation tests indicated that carboxymethyl chitosan had a selective depression effect on talc and the use of carboxymethyl chitosan as the depressant could achieve flotation separation of chalcopyrite from talc at pH 7. Adsorption studies showed that carboxymethyl chitosan only adsorbed on the surface of talc. This was the reason why carboxymethyl chitosan had high depression selectivity for talc. The zeta potential measurements and XPS analysis indicated that carboxymethyl chitosan adsorbed on the talc surface mainly through physical interaction and hydrophobic interaction may be the main driving force.
Źródło:: Physicochemical Problems of Mineral Processing; 2017, 53, 2; 1255-1263
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Simple three-level neutral point voltage balance control strategy based on SVPWM
Autorzy:: Bo, G.
Shanmei, Ch.
Yi, Q.
Powiązania:: https://bibliotekanauki.pl/articles/141238.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: space vector
neutral point voltage
voltage offset
PWM
Opis:: The unbalance of the neutral point voltage is an inherent problem of three-level neutral-point-clamped (NPC) inverter, the effect of neutral point voltage balancing which is caused by voltage vector is analyzed, and the relationship of the voltage offset and neutral point voltage is studied in this paper. This paper proposes a novel neutral point balance strategy for three-level NPC inverter based on space vector pulse width modulation (SVPWM). A voltage offset is added to the modulation wave, and a closed-loop neutral point voltage balance control system is designed. In the control system, the dwelling time of synthesis voltage vectors for SVPWM is varied to solve the problem of the unbalance of the neutral point voltage, the sequence of the voltage vectors maintains unchanging. Simulation and experimental results show the neutral point voltage balancing control strategy based on SVPWM is effective.
Źródło:: Archives of Electrical Engineering; 2013, 62, 1; 15-23
1427-4221
2300-2506
Pojawia się w:: Archives of Electrical Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

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