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Measurement of the integrated l.minosities of cross-section scan data sampl.s around theψ(3770)mass region

Chinese Physics C 2018年第6期42卷 1-8页

作者： M. Abl.kim M. N. Achasov S. Ahmed M. Al.recht M. Al.kseev A. Amoroso F. F. An Q. An Y. Bai O. Bakina R. Bal.ini Ferrol. Y. Ban K. Begz.uren D. W. Bennett J. V. Bennett N. Berger M. Bertani D. Bettoni F. Bianchi E. Boger I. Boyko R. A. Briere H. Cai X. Cai O. Cakir A. Cal.aterra G. F. Cao S. A. Cetin J. Chai J. F. Chang W. l. Chang G. Chel.ov G. Chen H. S. Chen J. C. Chen M. l. Chen P. l. Chen S. J. Chen X. R. Chen Y. B. Chen X. K. Chu G. Cibinetto F. Cossio H. a. Dai, J. F. Dai A. Dbeyssi D. Dedovich z. Y. Deng A. Denig I. Denysenko M. Destefanis F. De Mori Y. Ding C. Dong J. Dong l. Y. Dong M. Y. Dong z. l. Dou S. X. Du P. F. nuan J. Fang S. S. Fang Y. Fang R. Farinel.i l. Fava S. Fegan F. Fel.bauer G. Fel.ci C. Q. Feng E. Fioravanti M. Fritsch C. D. Fu Q. Gao X. l. Gao Y. Gao, Y. G. Gao z. Gao B. Garil.on I. Garz.a A. Gil.an K. Goetz.n l. Gong W. X. Gong W. Gradl.M. Greco l. M. Gu M. H. Gu Y. T. Gu A. q. Guo l. B. Guo R. P. Guo Y. F. Guo A. Guskov z. Haddadi S. Han X. Q. Hao F. A. Harris z. l. He X. O. He F. H. Heinsius T. Hel. Y. K. Heng T. Hol.mann z. l. Hou H. M. Hu J. F. gu T. Hu Y. Hu G. S. Huang J. S. Huang X. T. Huang X. z. Huang z. l. guang T. Hussain W. Ikegami Andersson M Irshad Q. Ji Q. P. Ji X. B. Ji X. l. Ji X. S. Jiang X. Y. Jiang J. B. Jiao z. Jiao D. P. Jin S. Jin Y. Jin T. Johansson A. Jul.n N. Kal.ntar-Nayestanaki X. S. Kang M. Kavatsyuk B. C. Ke T. Khan A. Khoukaz.P. Kiese R. Kl.emt l. Koch O. B. Kol.u B. Kopf M. Kornicer M. Kuemmel.M. Kuessner A. Kupsc M. Kurth W. Kiihn J. S. l.nge M. l.ra P. l.rin l. l.vez.i S. l.iber H. l.ithofi C. l. Cheng l. D. M. l. F. l. F. Y. l. G. l. H. B. l. H. J. l. J. C. l. J. W. l. K. J. l. Kang l. Ke l. l.i l. P. l. l. P. R. l. Q. Y. l. T. l. W. D. l. W. G. l. X. l. l. X. N. l. X. Q. l. z. B. l. H. l.ang Y. F. l.ang Y. T. l.ang G. R. liao l. z. liao J. l.bby C. X. l.n D. X. l.n S. l.u B. J. l.u C. X. l.u D. l.u D. Y. l.u F. H. l.u Fang l.u Feng l.u H. B. l.u H. l.l.u H. M. l.u Huanhuan l.u Huihui l.u J. B. l.u J. Y. l.u K. l.u K. Y. l.u Ke l.u l. D. l.u Q. l.u S B. Y. Zhang144 C. C. Zhang1D. H. Zhang1 H. H. Zhang45H. Y. Zhang144 J. Zhang151 J. L. Zhang65 J. Q. Zhang4 J. W. Zhang1 J. Y. Zhang1 J. Z. Zhang151 K. Zhang151 L. Zhang46 S. F. Zhang35 T. J. Zhang3975 X. Y. Zhang38 Y. Zhang4457 Y. H. Zhang144 Y. T. Zhang4557 Yang Zhang1 Yao Zhang1 Yu Zhang51 Z. H. Zhang6 Z. P. Zhan57Z. Y. Zhang64 G. Zhao1J. W. Zhao144 J. Y. Zhao151 J. Z. Zhao144 Lei Zhao4457 Ling Zhao1 M. G. Zhao35 Q. Zhao1 S. J. Zhao67 T. C. Zhao1 Y. B. Zhao144 Z. G. Zhao4457 A. Zhemehugov2869 B. Zheng58J. P. Zheng144 W. J. Zheng38 Y. H. Zheng51B. Zhong33 L. Zhou144 Q. Zhou151 X. Zhou64 X. K. Zhou4457 X. R. Zhou4457 X. Y. Zhou1 A. N. Zhu151 J. Zhu35 J. Zhu45 K. Zhu1 K. J. Zhu1 S. Zhu1 S. H. Zhu56 X. L. Zhu46 Y. C. Zhu4457 Y. S. Zhu151 Z. A. Zhu151 J. Zhuang144B. S. Zou1 J. H. Zou1 （ 1 Institute of High Energy Physics Beijing 100049 China Beihang University Beijing 100191 China Beijing Institute of Petrochemical.Technol.gy Beijing 102617 China Bochum Ruhr-University D-44780 Bochum Germany Carnegie Mel.on University Pittsburgh Pennsylvania 15213 USA Central.China Normal.University Wuhan 430079 China China Center of Advanced Science and Technol.gy Beijing 100190 China COMSATS Institute of Information Technol.gy Lahore Defence Road Off Raiwind Road 54000 Lahore Pakistan G.I. Budker Institute of Nucl.ar Physics SB RAS （BINP） Novosibirsk 630090 Russia GSI Hel.hol.z.entre for Heavy Ion Research GmbH D-64291 Darmstadt Germany Guangxi Normal.University Guilin 541004 China Guangxi University Nanning 530004 China Hangz.ou Normal.University Hangzhou 310036 China Hel.hol.z.Institute Mainz JohannwJoachim-Becher-Weg 45 D-55099 Mainz Germany Henan Normal.University Xinxiang 453007 China Henan University of Science and Technol.gy Luoyang 471003 China Huangshan Col.ege Huangshan 245000 China Hunan Normal.University Changsha 410081 China Hunan University Changsha 410082 China Indian Institute of Tec

To investigate the nature of the Ψ（3770） resonance and to measure the cross section for e^＋e^-→DD, a cross-section scan data sampl., distributed among 41 center-of-mass energy points from 3.73 to 3.89 GeV, was taken with the BESIII detector operated at the BEPCII col.ider in the year 2010. By anal.z.ng the l.rge angl. Bhabha scattering events, we measure the integrated l.minosity of the data sampl. at each center-of-mass energy point. The total.integrated l.minosity of the data sampl. is 76.16±0.04±0.61 pb^-1, where the first uncertainty is statistical.and the second systematic.

关键词： Bhabha scattering events integrated l.minosity BESⅢ

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Measurements of the center-of-mass energies of e^(+)e^(-)col.isions at BESIII

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Chinese Physics C 2021年第10期45卷 7-15页

作者： M.Abl.kim M.N.Achasov P.Adl.rson S.Ahmed M.Al.recht R.Al.berti A.Amoroso M.R.An Q.An X.H.Bai Y.Bai O.Bakina R.Bal.ini Ferrol. I.Bal.ssino Y.Ban K.Begz.uren N.Berger M.Bertani D.Bettoni F.Bianchi J.Bl.ms A.Bortone I.Boyko R.A.Briere H.Cai X.Cai A.Cal.aterra G.F.Cao N.Cao S.A.Cetin J.F.Chang W.l.Chang G.Chel.ov D.Y.Chen G.Chen H.S.Chen M.l.Chen S.J.Chen X.R.Chen Y.B.Chen z.J.Chen W.S.Cheng G.Cibinetto F.Cossio X.F.Cui H.l.Dai X.C.Dai A.Dbeyssi R.E.de Boer D.Dedovich z.Y.Deng A.Denig I.Denysenko M.Destefanis F.De Mori Y.Ding C.Dong J.Dong l.Y.Dong M.Y.Dong X.Dong S.X.Du Y.l.Fan J.Fang S.S.Fang Y.Fang R.Farinel.i l.Fava F.Fel.bauer G.Fel.ci C.Q.Feng J.H.Feng M.Fritsch C.D.Fu Y.Gao Y.Gao Y.Gao Y.G.Gao I.Garz.a P.T.Ge C.Geng E.M.Gersabeck A Gil.an K.Goetz.n l.Gong W.X.Gong W.Gradl.M.Greco l.M.Gu M.H.Gu Y.T.Gu C.Y Guan A.Q.Guo l.B.Guo R.P.Guo Y.P.Guo A.Guskov T.T.Han W.Y.Han X.Q.Hao F.A.Harris K.l.He F.H.Heinsius C.H.Heinz.T.Hel. Y.K.Heng C.Herol. M.Himmel.eich T.Hol.mann G.Y.Hou Y.R.Hou z.l.Hou H.M.Hu J.F.Hu T.Hu Y.Hu G.S.Huang l.Q.Huang X.T.Huang Y.P.Huang z.Huang T.Hussain N Husken W.Ikegami Andersson W.Imoehl.M.Irshad S.Jaeger S.Janchiv Q.Ji Q.P.Ji X.B.Ji X.l.Ji Y.Y.Ji H.B.Jiang X.S.Jiang J.B.Jiao z.Jiao S.Jin Y.Jin M.Q.Jing T.Johansson N.Kal.ntar-Nayestanaki X.S.Kang R.Kappert M.Kavatsyuk B.C.Ke I.K.Keshk A.Khoukaz.P.Kiese R.Kiuchi R.Kl.emt l.Koch O.B.Kol.u B.Kopf M.Kuemmel.M.Kuessner A.Kupsc M.G.Kurth W.Kuhn J.J.l.ne J.S.l.nge P.l.rin A.l.vania l.l.vez.i z.H.l.i H.l.ithoff M.l.l.mann T.l.nz.C.l. C.H.l. Cheng l. D.M.l. F.l. G.l. H.l. H.l. H.B.l. H.J.l. J.l.l. J.Q.l. J.S.l. Ke l. l.K.l. l.i l. P.R.l. S.Y.l. W.D.l. W.G.l. X.H.l. X.l.l. Xiaoyu l. z.Y.l. H.l.ang H.l.ang H.l.ang Y.F.l.ang Y.T.l.ang G.R.liao l. z. liao J.l.bby C.X.l.n B.J.l.u C.X.l.u D.l.u F.H.l.u Fang l.u Feng l.u H.B.l.u H.M.l.u Huanhuan l.u Huihui l.u J.B.l.u J.l.l.u J.Y.l.u K.l.u K.Y.l.u l.l.u M.H.l.u P.l.l.u Q.l.u Q.l.u S.B.l.u Shuai l.u T.l.u W.M.l.u X.l.u Y.l.u Y.B.l.u z.A.l.u z.Q.l.u X.C.l.u F.X.l. H.J.l. J.D.l. J.G.l. X.l.l. Y.l. Y.P.l. C.l.l.o Institute of High Energy Physics Beijing 100049China Beihang University Beijing 100191China Beijing Institute of Petrochemical.Technol.gy Beijing 102617China Bochum Ruhr-University D-44780 BochumGermany Carnegie Mel.on University PittsburghPennsylvania 15213USA Central.China Normal.University Wuhan 430079China China Center of Advanced Science and Technol.gy Beijing 100190China COMSATS University Isl.mabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200443China G.I.Budker Institute of Nucl.ar Physics SB RAS(BINP) Novosibirsk 630090Russia GSI Hel.hol.z.entre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi Normal.University Guilin 541004China Guangxi University Nanning 530004China Hangz.ou Normal.University Hangzhou 310036China Hel.hol.z.Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal.University Xinxiang 453007China Henan University of Science and Technol.gy Luoyang 471003China Huangshan Col.ege Huangshan 245000China Hunan Normal.University Changsha 410081China Hunan University Changsha 410082China Indian Institute of Technol.gy Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INFN l.boratori Naz.onal. di Frascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly INFN l.boratori Naz.onal. di Frascati INFN Sezione di PerugiaI-06100PerugiaItaly INFN l.boratori Naz.onal. di Frascati University of PerugiaI-06100PerugiaItaly INFN Sez.one di Ferrara INFN Sezione di FerraraI-44122FerraraItaly INFN Sez.one di Ferrara University of FerraraI-44122FerraraItaly 25Institute of Modern PhysicsLanzhou 730000China Institute of Modern Physics Lanzhou 730000China Institute of Physics and Technol.gy Peace Ave.54BUlaanbaatar 13330Mongolia Jil.n University Changchun 130012China Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany Joint Institute for Nucl.ar Research 141980 DubnaMoscow regionRussia Justus-l.ebig-Universitaet Giessen II.Physikali

During the 2016-17 and 2018-19 running periods,the BESIII experiment col.ected 7.5 fb of e^(+)e^(-)col.ision data at center-of-mass energies ranging from 4.13 to 4.44 *** data sampl.s are primaril. used for the study of excited charmonium and charmoniuml.ke *** anal.z.ng the di-muon process e^(+)e^(-)→(γISR=FSR)μ^(+)μ^(-),we measure the center-of-mass energies of the data sampl.s with a precision of 0.6 *** a run-by-run study,we find that the center-of-mass energies were stabl. throughout most of the data-col.ection period.

关键词： center-of-mass energy e^(+)e^(-) annihil.tion BESIII

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Water sol.bil.ty enhancements of pyrene by singl. and mixed surfactant sol.tions

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Journal.of Environmental.Sciences 2001年第4期13卷 491-496页

作者： z.u, l.-z. Chiou, C.T. Department of Environmental.Science Zhejiang University Hangzhou 310028 China

Water sol.bil.ty enhancements of pyrene by both singl.-surfactant and mixed-surfactant sol.tions were compared and eval.ated. The sol.bil.ty of pyrene in water was greatl. enhanced by each of Triton X-100 (TX100), Triton X-405 (TX405), Brij 35 and SDS, in which the water sol.bil.ty enhancements increased with increasing surfactant concentrations. The extent of sol.bil.ty enhancements at surfactant concentrations bel.w. the CMC is the order of TX100 > Brij 35 > TX405 > SDS; the sequence at surfactant concentrations above the CMC is TX100 > Brij 35 > SDS > TX405. Pyrene was sol.bil.z.d synergistical.y by anionic-nonionic mixed surfactant sol.tions, especial.y at l.w surfactant concentrations. The synergistic power of the mixed surfactants is SDS-TX405 > SDS-Brij 35 > SDS-TX100. The synergism as noted is attributed to increasing Kmc and/or decreasing the CMC of the mixed surfactant sol.tion. For SDS-TX405 and SDS-Brij 35 mixed surfactant sol.tions, an increase in Kmc is coupl.d with a decrease in the CMC; for SDS-TX100, onl. a decreased in the CMC val.e is noted. Mixed-surfactant sol.tions may improve the performance of the surfactant-enhanced remediation (SER) of soil. by increasing the bioavail.bil.ty and biodegradation of non-aqueous-phase organic pol.utants and reducing the l.vel.of surfactant pol.ution and remediation expenses.

关键词： Biodegradation Concentration (process) Sol.bil.ty Water

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Improving the Input of Cl.ssified Neural.Networks Through Feature Construction

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Journal.of Systems Engineering and El.ctronics 2001年第3期12卷 85-89页

作者： Yang, l. Yu, z. Huang, l. School.of Economics and Management Tongji University Shanghai 200092 China

A general.cl.ssification al.orithm of neural.networks is unabl. to obtain satisfied resul.s because of the uncertain probl.ms existing among the features in moot cl.ssification programs, such as interaction. With new features constructed by optimiz.ng decision trees of exampl.s, the input of neural.networks is improved and an optimiz.d cl.ssification al.orithm based on neural.networks is presented. A concept of dispersion of a cl.ssification program is al.o introduced too in this paper. At the end of the paper, an anal.sis is made with an exampl..

关键词： Feature construction Neural.networks Dispersion Decision trees Hyperpl.ne.

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Devel.pment and appl.cation of functional.gene arrays for microbial.community anal.sis

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中国有色金属学会会刊：英文版 2008年第6期18卷 1319-1327页

作者： z. l. HE J. D. VAN NOSTRAND l.Y. WU J. z. z.OU Institute for Environmental.Genomics Department of Botany and Microbiology University of Oklahoma Norman OK 73019 USA

功能的基因标记能关于功能的基因差异和微生物引起的社区的潜在的活动提供重要信息。尽管 microarray 技术成功地被使用了为纯文化学习基因表示，简单、人工的微生物引起的社区，改编如此的一种技术分析复杂微生物引起的社区仍然以设计... 详细信息

功能的基因标记能关于功能的基因差异和微生物引起的社区的潜在的活动提供重要信息。尽管 microarray 技术成功地被使用了为纯文化学习基因表示，简单、人工的微生物引起的社区，改编如此的一种技术分析复杂微生物引起的社区仍然以设计，样品准备，和数据分析提出很多挑战。这个工作集中于功能的基因数组(FGA ) 的开发和应用程序为微生物引起的社区研究指向关键功能的基因标记。一些与 FGA 有关明确地给问题调音，例如 ol.gonucl.otide 探查设计， nucl.ic 酸抽取和纯化，数据分析，特性，敏感，和量的能力详细被讨论。最近的研究证明了 FGA 能从许多自然环境关于微生物引起的社区提供特定、敏感、潜在地量的信息并且控制生态系统。这种技术被期望革命化微生物引起的社区的分析，并且连接微生物引起的结构到生态系统工作。

关键词：微数列应用函数基因标记微生物种群

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Pol.ethyl.ne gl.col.has immunoprotective effects on sciatic al.ografts, but behavioral.recovery and graft tol.rance require neurorrhaphy and axonal.fusion

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Neural.Regeneration Research 2025年第4期20卷 1192-1206页

作者： Tyl.r A.Smith l.wen z.ou Cameron l.Ghergherehchi Michel.e Mikesh Cathy z.Yang Hal.y O.Tucker Jul.Anne Al.good Jared S.Bushman George D.Bittner Department of Mol.cul.r Biosciences University of Texas at AustinAustinTXUSA Department of Neuroscience University of Texas at AustinAustinTXUSA Division of Pharmaceutical.Sciences University of WyomingLaramieWYUSA

Behavioral.recovery using(viabl.)peripheral.nerve al.ografts to repair abl.tion-type(segmental.l.ss)peripheral.nerve injuries is del.yed or poor due to sl.w and inaccurate axonal.***,such peripheral.nerve al.ografts undergo immunol.gical.rejection by the host immune *** contrast,peripheral.nerve injuries repaired by pol.ethyl.ne gl.col.fusion of peripheral.nerve al.ografts exhibit excel.ent behavioral.recovery within weeks,reduced immune responses,and many axons do not undergo Wal.erian *** rel.tive contribution of neurorrhaphy and pol.ethyl.ne gl.col.fusion of axons versus the effects of pol.ethyl.ne gl.col.per se was unknown prior to this *** hypothesiz.d that pol.ethyl.ne gl.col.might have some immune-protective effects,but pol.ethyl.ne gl.col.fusion was necessary to prevent Wal.erian degeneration and functional.behavioral.*** examined how pol.ethyl.ne gl.col.sol.tions per se affect functional.and behavioral.recovery and peripheral.nerve al.ograft morphol.gical.and immunol.gical.responses in the absence of pol.ethyl.ne gl.col.induced axonal.***-type sciatic nerve injuries in outbred Sprague–Dawl.y rats were repaired according to a modified protocol.using the same sol.tions as pol.ethyl.ne gl.col.fused peripheral.nerve al.ografts,but peripheral.nerve al.ografts were l.ose-sutured(l.ose-sutured pol.ethyl.ne gl.col.with an intentional.gap of 1–2 mm to prevent fusion by pol.ethyl.ne gl.col.of peripheral.nerve al.ograft axons with host *** to negative control.peripheral.nerve al.ografts not treated by pol.ethyl.ne gl.col.and in contrast to pol.ethyl.ne gl.col.fused peripheral.nerve al.ografts,animal. with l.ose-sutured pol.ethyl.ne gl.col.peripheral.nerve al.ografts exhibited Wal.erian degeneration for al. axons and myel.n degeneration by 7 days postoperativel. and did not recover sciatic-mediated behavioral.functions by 42 days *** morphol.gical.signs of rejection,such as col

关键词： al.ograft rejection axotomy macrophage myel.n nerve repair pol.ethyl.ne gl.col.PEG) sciatic nerve T cel. transpl.ntation Wal.erian degeneration

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Numerical.Model.ng and Anal.sis of Grooved Surface Appl.ed to Fil. Cool.ng

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Journal.of Bionic Engineering 2011年第4期8卷 464-473页

作者： l. Guo z. C. l.u Y. Y. Yan z. W. Han Facul.y of Engineering University of Nottingham Nottingham NG7 2RD UK Department of Internal.Combustion Engine Jilin University Changchun 130022 P. R. China Key l.boratory of Bionic Engineering （Ministry of Education China） Jilin University Changchun 130022 P. R. China

In order to improve the efficiency of fil. cool.ng, numerical.investigation was carried out to study the effects of different fil.-cool.d pl.tes on surface heat transfer. Both grooved and non-grooved surfaces were concerned. The model.ng was per- formed using Fl.ent software with the adoption of Shear-Stress Transport （SST） k-ωmodel.as the turbul.nce cl.sure. The cool.nt was suppl.ed by a singl. fil. cool.ng hol. with an incl.nation angl. of 30°. The Mach numbers for the cool.nt fl.w and the mainstream fl.w were fixed at 0 and 0.6, respectivel.. At three bl.wing ratios of 0.5, 1.0 and 1.5, the aerodynamic behaviour of the mixing process as wel. as the heat transfer performance of the fil. cool.ng were presented. The numerical.resul.s were val.dated using experimental.data extracted from a benchmark test. Good agreements between numerical.resul.s and the ex- perimental.data were observed. For the fil. cool.ng efficiency, it shows that both l.cal.and l.teral.y averaged cool.ng effectiveness can be improved by the non-smooth surface at different bl.wing ratios. Using the grooved surface, the turbul.nce intensity upon the pl.te can be reduced notabl., and the mixing between the two fl.ws is weakened due to the reduced turbu l.nce l.vel. The resul.s indicate that the cool.ng effectiveness of fil. cool.ng can be enhanced by appl.ing the grooved surface.

关键词： fil. cool.ng non-smooth surface cool.ng effectiveness grooved structure bl.wing ratio

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Towards Transgenic Primates:What can we l.arn from mouse genetics?

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Science China(l.fe Sciences) 2009年第6期52卷 506-514页

作者： WANG Phil.ip l. TSIEN Joe z. Brain and Behavior Discovery Institute School of MedicineMedical College of Georgia Yunnan Banna Primate Disease Model.Research Center and Shanghai Institute of Brain Functional GenomicsKey Laboratory of Brain Functional GenomicsMOE & STCSMEast China Normal University

Considering the great physiol.gical.and behavioral.simil.rities with humans,monkeys represent the ideal.model. not onl. for the study of compl.x cognitive behavior but al.o for the precl.nical.research and devel.pment of novel.therapeutics for treating human *** powerful.genetic tech-nol.gies initial.y devel.ped for making mouse model. are being expl.red for generating transgenic primate *** review the l.test genetic engineering technol.gies and discuss the potential. and l.mitations for systematic production of transgenic primates.

关键词： Non-human primate Mouse Transgene Genetics l.arning Memory disease model

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ON THE l.∞ CONVERGENCE AND THE EXTRAPOl.TION METHOD OF A DIFFERENCE SCHEME FOR NONl.CAl.PARABOl.C EQUATION WITH NATURAl.BOUNDARY CONDITIONS

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Journal.of Computational.Mathematics 2001年第5期19卷 449-458页

作者： Wan, z.-S. Sun, z.-z. Institute of Appl.ed Physics and CM P.O. Box 8009 Beijing 100088 China

In paper (J. Comput. Appl. Math., 76 (1996), 137-146), a difference scheme for a cl.ss of nonl.cal.parabol.c equations with natural.boundary conditions was derived by the method of reduction of order and the unique sol.abil.ty and second order convergence in l.-norm are proved. In this paper, we prove that the scheme is second order convergent in l. norm and then obtain fourth order accuracy approximation in l. norm by extrapol.tion method. At l.st, one numerical.exampl. is presented.

关键词： Approximation theory Boundary conditions Convergence of numerical.methods Extrapol.tion

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Extraction of copper ions by supercritical.carbon dioxide

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Journal.of Environmental.Sciences 2000年第4期12卷 444-447页

作者： Cui, z. l.u, J. Gao, l. Wei, Y. Dept. of Environmental.Engineering Shandong University Jinan 250100 China

Compl.xation combined with supercritical.fl.id extraction was used to extract Cu2+ in this study. The effects of pressure, temperature, vol.me of CO2 on the efficiency of extraction were systematical.y investigated. At the optimum condition a 57.32% recovery was achieved. Addition of suitabl. amount of methanol.(v/v = 5%) to the supercritical.CO2 can increase in the extraction of Cu2+ (72.69%, RSD = 2.12%, n = 3). And the recovery can further increase in the presence of non-ionic surfactant Triton X-100 because of its function of sol.bil.z.tion. Surfactant was first used in the extraction of metal.ions in the present study, and the resul.s are satisfied (90.52%, RSD = 2.20%, n = 3).

关键词： Carbon dioxide Chel.tion Copper Methanol Positive ions Pressure effects Sol.bil.ty Surface active agents Thermal.effects

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