For a long time,it has been something of a mystery why,in Joseph Needham’s third volume of Science and Civilisation in China,a translation by Arnold Koslow of a proof of the Pythagorean Theorem was published,together...For a long time,it has been something of a mystery why,in Joseph Needham’s third volume of Science and Civilisation in China,a translation by Arnold Koslow of a proof of the Pythagorean Theorem was published,together with an inappropriate diagram indicating how that proof proceeded.The story of the origin of the translation,accompanied by the irrelevant diagram,is here recounted by the author of both items,along with the translation accompanied by the appropriate missing diagram for the proof,which was intended for publication but never made it.展开更多
A pilot scale test was conducted in a submerged membrane bioreactor SMBR with capacity of 10. 0 m^3/d for 120 days to treat high-strength Chinese traditional medicine wastewater. Performance of the SMBR was investigat...A pilot scale test was conducted in a submerged membrane bioreactor SMBR with capacity of 10. 0 m^3/d for 120 days to treat high-strength Chinese traditional medicine wastewater. Performance of the SMBR was investigated with a sludge retention time （ TSR ） of 50 days, a hydraulic retention time （ THR ） of 8.0 h, membrane flux of 8. 0 IV（ m^2 · h） and dissolved oxygen （DO） concentration of 2. 0 - 3. 0 mg/L, respectively. It was observed that the SMBR had high capacity of COD and suspended solid （SS） removal. The influent COD concentration was fluctuated between I 000 and 5 000 mg/L, while the averaged effluent COl） concentration was only 44. 6 mg/L. The influent SS concentration was fluctuated between 1 000 and 1 600 mg/L, while little effluent SS was detected. It was found that the COD remove rate increased with mixed liquor suspended solids （MLSS） and organic loading rate （ROL）. In order to obtain good-quality effluent, the operational conditions of the SMBR were suggested as follows： the temperature was controlled above 10 ℃, MLSS about 7000 mg/L, R,L under 24. 76 kg/（ m^3 · d）, low vacuum value and constant water flux.展开更多
THE ceremonious premiere was recently held of a Chinese film whose theme is the grim search by a policeman in a small town for his missing gun. The film is the maiden work of a young director. It starred Jiang Wen, cur-
文摘For a long time,it has been something of a mystery why,in Joseph Needham’s third volume of Science and Civilisation in China,a translation by Arnold Koslow of a proof of the Pythagorean Theorem was published,together with an inappropriate diagram indicating how that proof proceeded.The story of the origin of the translation,accompanied by the irrelevant diagram,is here recounted by the author of both items,along with the translation accompanied by the appropriate missing diagram for the proof,which was intended for publication but never made it.
基金Sponsored by the National High Technology Research and Development Program of China(Grant No.2002AA601310).
文摘A pilot scale test was conducted in a submerged membrane bioreactor SMBR with capacity of 10. 0 m^3/d for 120 days to treat high-strength Chinese traditional medicine wastewater. Performance of the SMBR was investigated with a sludge retention time （ TSR ） of 50 days, a hydraulic retention time （ THR ） of 8.0 h, membrane flux of 8. 0 IV（ m^2 · h） and dissolved oxygen （DO） concentration of 2. 0 - 3. 0 mg/L, respectively. It was observed that the SMBR had high capacity of COD and suspended solid （SS） removal. The influent COD concentration was fluctuated between I 000 and 5 000 mg/L, while the averaged effluent COl） concentration was only 44. 6 mg/L. The influent SS concentration was fluctuated between 1 000 and 1 600 mg/L, while little effluent SS was detected. It was found that the COD remove rate increased with mixed liquor suspended solids （MLSS） and organic loading rate （ROL）. In order to obtain good-quality effluent, the operational conditions of the SMBR were suggested as follows： the temperature was controlled above 10 ℃, MLSS about 7000 mg/L, R,L under 24. 76 kg/（ m^3 · d）, low vacuum value and constant water flux.
文摘THE ceremonious premiere was recently held of a Chinese film whose theme is the grim search by a policeman in a small town for his missing gun. The film is the maiden work of a young director. It starred Jiang Wen, cur-
