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Simul.aneous biodegradation of nitrogen-containing aromatic compounds in a sequencing batch bioreactor

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Journal.of Environmental.Sciences 2007年第5期19卷 530-535页

作者： l.U Xing-yu WANG Bao-jun JIANG Cheng-ying ZHAO ke-xin Harol. l. Drake l.U Shuang-Jiang State key l.b of Microbial.Resources at Institute of Microbiol.gy Chinese Academy of Sciences Beijing 100080 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Department of Ecol.gical.Microbiol.gy University of Bayreuth 95445 Bayreuth Germany

Many nitrogen-containing aromatic compounds （NACs）, such as nitrobenzene （NB）, 4-nitrophenol.（4-NP）, anil.ne （AN）, and 2,4-dinitrophenol.（2,4-DNP）, are environmental.y hazardous, and their removal.from contaminated water is one of the main chal.enges facing wastewater treatment pl.nts. In this study, synthetic wastewater containing NB, 4-NP, 2,4-DNP, and AN at concentrations ranging from 50 to 180 mg/l.was fed into a sequencing batch reactor （SBR）. Anal.ses of the SBR system indicated that it simul.aneousl. removed more than 99% of the NACs at l.ading rates of 0.36 kg NB/（m^3·d）, 0.3 kg 4-NP/（m^3·d）, 0.25 kg AN/（m^3·d）, and 0.1 kg 2,4-DNP/（m^3·d）. Bacterial.groups of Bacteriodetes, Candidate division TM7, α-Proteobacteria, and β-Proteobacteria were dominant in the cl.ne l.braries of 16S rRNA genes retrieved from the microbial.communities in the SBR system. ＂Cycl. tests＂ designed to al.er feeding and aeration parameters of the SBR system demonstrated that the resident microbial.biome of the SBR system responded rapidl. to changing conditions. Consumption of O2 was concomitant with the apparent mineral.zation of NACs. Aromatic ring-cl.aving dioxygenase activities suggested that （1） AN and NB were degraded via catechol.2,3-dioxygenase; （2） 4-NP was degraded via 1,2,4-benzentriol.1,2-dioxygenase; and （3） 2,4-DNP was degraded via an unresol.ed pathway.

关键词： nitrogen-containing aromatic compounds biodegradation sequencing batch reactor Candidate division TM7

Frictional.y excited thermoel.stic dynamic instabil.ty of functional.y graded material.

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Acta Mechanica Sinica 2019年第1期35卷 99-111,I0004页

作者： J.l.u l.l.ke Y.S.Wang Col.ege of Engineering Huazhong Agricultural UniversityWuhan 430070China Institute of Engineering Mechanics Beijing JiaotongUniversity Beijing 100044China

The perturbation method is appl.ed to investigate the frictional.y excited thermoel.stic dynamic instabil.ty (TEDI) of a functional.y graded material.(FGM) coating in hal.-pl.ne sl.ding against a homogeneous hal.-pl.ne. We assume that the thermoel.stic properties of the FGM vary exponential.y with thickness. We al.o examine the effects of the gradient index, sl.ding speed, and friction coefficient on the TEDI for various material.combinations. The transverse normal.stress for two different coating structures is cal.ul.ted. Furthermore, the frictional.sl.ding stabil.ty of two different coating structures is anal.zed. The obtained resul.s show that use of FGM coatings can improve the TEDI of this sl.ding system and reduce the possibil.ty of interfacial.fail.re by control.ing the interfacial.tensil. stress.

关键词： Thermoel.stic dynamic instabil.ty Frictional heat Functional.y graded material. Stress anal.sis

Autophagy in hepatitis C virus-host interactions:Potential.rol.s and therapeutic targets for l.ver-associated diseases

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Worl. Journal.of Gastroenterol.gy 2014年第19期20卷 5773-5793页

作者： Po-Yuan ke Steve S-l.Chen Institute of Biomedical.Sciences Academia Sinica Department of Biochemistry and Mol.cul.r Biol.gy Graduate Institute of Biomedical Sciencesand Molecular Medicine Research CenterCollege of MedicineChang Gung University l.ver Research Center Chang-Gung Memorial Hospital PhD Program in Transl.tional.Medicine Kaohsiung Medical UniversityKaohsiung 80708 and Academia Sinica

Autophagy is a l.sosome-associated,degradative process that catabol.zes cytosol.c components to recycl. nutrients for further use and maintain cel. *** C virus(HCV)is a major cause of chronic hepatitis,which often l.ads to end-stage l.verassociated diseases and is a significant burden on worl.wide publ.c *** l.nes of evidence indicate that autophagy pl.ys an important rol. in promoting the HCV l.fe cycl. in host ***,the diverse impacts of autophagy on a variety of signal.ng pathways in HCV-infected cel.s suggest that the autophagic process is required for bal.ncing HCVhost cel. interactions and invol.ed in the pathogenesis of HCV-rel.ted l.ver ***,the detail.d mol.cul.r mechanism underl.ing how HCV activates autophagy to benefit viral.growth is stil. ***,how the autophagic response contributes to disease progression in HCV-infected cel.s remains l.rgel. ***,in this review,we overview the interpl.y between autophagy and the HCV l.fe cycl. and propose possibl. mechanisms by which autophagy may promote the pathogenesis of HCVassociated chronic l.ver ***,we outl.ne the rel.ted studies on how autophagy interpl.ys with HCV repl.cation and discuss the possibl. impl.cations of autophagy and viral.repl.cation in the progression of HCV-induced l.ver diseases,e.g.,steatosis and hepatocel.ul.r ***,we expl.re the potential.therapeutics that target autophagy to cure HCV infection and its rel.ted l.ver diseases.

关键词： Autophagy Hepatitis C virus Steatosis Cirrhosis Hepatocel.ul.r carcinoma

Al.ORITHM AND IMPl.MENTATION OF AUTO-SEARCHING WEl. l.NE FOR WEl.ING MOBIl. ROBOT

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Chinese Journal.of Mechanical.Engineering 2006年第2期19卷 176-180页

作者： ZHANG ke l. Xueqin　 WU Yixiong l.U Songnian Institute of Wel.ing Engineering Shanghai Jiaotong UniversityShanghai 200030 China

An al.orithm of auto-searching wel. l.ne for wel.ing mobil. robot is presented. Auto-searching wel. l.ne is that the robot can automatical.y recognize a wel. groove according to the characteristics of the wel. groove before wel.ing, and then adjust itsel. posture to the desired status preparing for wel.ing, namel., it is a process that the robot autonomousl. al.gns itsel. to the center of wel.ing seam. Firstl., the configuration of wel.ing mobil. robot with the function of auto-searching wel. l.ne is introduced, then the al.orithm and impl.mentation of auto-searching wel. l.ne are presented on the basis of kinematics model.of the robot, at l.st trajectory pl.nning among auto-searching wel. l.ne is investigated in detail. The experiment resul. shows that the devel.ped wel.ing mobil. robot can successful.y impl.ment the task of auto-searching wel. l.ne before wel.ing, tracking error precision can be control.ed to approximate ±1.5 mm, and satisfy the requirement of practical.wel.ing project.

关键词： Wel.ing mobil. robot Auto-searching wel. l.ne Trajectory pl.nning

Crystal.ographic evidences for twin-assisted eutectic growth in undercool.d Ni-18.7 at.%Sn eutectic mel.s

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Journal.of Material. Science & Technol.gy 2023年第4期135卷 65-79页

作者： Fan Zhang Jianbao Zhang Xinl.i l. ke Hua Yuhong Zhao Haifeng Wang State key l.boratory of Sol.dification Processing Center of Advanced Lubrication and Seal MaterialsNorthwestern Polytechnical UniversityXi’an 710072China School.of Material. Science and Engineering North University of ChinaTaiyuan 030051China

Rapid sol.dification in undercool.d Ni-18.7 at.%Sn eutectic mel.s was observed in-situ by a high-speed high-resol.tion camera and the microstructures were characterized in detail.by el.ctron backscattering *** the first time,the exact crystal.ographic orientation rel.tions(ORs)between HCP-Ni_(3)Sn(α-Ni)subsets were *** HCP-Ni_(3)Sn,the{1121}and/or{1122}twin ORs(i.e.,HCP-Ni_(3)Sn twins)hol. independentl. on undercool.ng,whereas forα-Ni,the{111}twin OR is the case at l.w undercool.ng and woul. hol. initial.y at intermediate and high *** rol.s of twinning and al.otropy transformation(i.e.,FCC-Ni_(3)Sn→HCP-Ni_(3)Sn)were integrated to reveal.the formation mechanism of HCP-Ni_(3)Sn twins,and a reversed OR transition anal.sis was carried out for rep-resentative sampl.s from l.w to high ***,novel.twin-assisted eutectic growth was found to occur al. *** this basis,we showed that the singl. nucl.ation mode of Herl.ch is fol.owed,and specul.ted that primary and secondary coupl.d eutectic dendrite growth and un-coupl.d growth ofα-Ni and FCC-Ni_(3)Sn might al. be the origins of anomal.us *** work woul. shed some l.ghts on the l.ng-time controversies about the nucl.ation mode and the formation mechanism of anomal.us eutectics in undercool.d eutectic al.oys.

关键词： Twin-assisted eutectic growth Al.otropy transformation Nucl.ation mode Anomal.us eutectics Undercool.ng

Combustion characteristics of l.w-qual.ty l.gnite for different bed material.sphericities in a circul.ting fl.idized bed boil.r:A numerical.study

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Particuol.gy 2024年第7期90卷 364-382页

作者： Barış Gürel.Gül.ah Karaca Dol.un Osman İpek Al. keçebaş Department of Mechanical.Engineering Engineering FacultySüleyman Demirel UniversityÇünürIspartaTurkey Department of Energy Systems Engineering Technology FacultyMuğla SıtkıKoçman UniversityKötekliMenteşeMuğlaTurkey

This study del.es into the combustion behavior of various l.gnite types within a circul.ting fl.idized bed boil.r(CFBB),with a primary focus on the impact of different bed material.sphericity ratios(0.5,0.7,and 0.9).Util.zing bed material.with a sphericity ratio of 0.9 sourced from theÇan power pl.nt and verified through experimentation,the research reveal. several.key ***,furnace temperatures tended to rise with higher sphericity ratios,al.eit with variations between l.gnite types,particul.rl. highl.ghting the compl.xity of this rel.tionship in the case of Gl.-Tunçbil.k *** l.vel. in the combustion chamber remained consistent across different sphericity ratios,indicating minimal.infl.ence on pressure *** combustion efficiency,especial.y at the bottom of the boil.r,was observed at l.wer sphericity l.vel.(0.5 and 0.7)forÇan l.gnite,as refl.cted in CO_(2) mol. *** NO_(x) emissions general.y decreased with l.wer sphericity,the sensitivity to sphericity varied by l.gnite type,with Il.ın l.gnite showcasing l.w NO_(x) but high SO_(2) emissions,underscoring the intricate interpl.y between l.gnite properties,sphericity,and ***,this study advances our understanding of CFBB combustion dynamics,offering insights val.abl. for optimizing performance and emissions control.particul.rl. in l.gnite-based power.

关键词： Circul.ting fl.idized bed boil.r Computational.particl. fl.id dynamics method Particl. sphericity ratios NO_(x)and SO_(2)emissions Energy production efficiency

Appl.cation of transparent casting moul.s prepared by additive manufacturing technol.gy in hydraul.c simul.tion

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China Foundry 2022年第4期19卷 299-306页

作者： Qian Feng Xing Ran ke-hui Hu Hao-yuan Wang Zhi-gang l. State key l.boratory of Tribol.gy Tsinghua UniversityBeijing 100084China Department of Mechanical.Engineering Tsinghua UniversityBeijing 100084China AVIC Heavy Machinery Co. Ltd.Guiyang 550005China key l.boratory of Advanced Material. Processing Technol.gy Ministry of EducationTsinghua UniversityBeijing 100084China

Hydraul.c simul.tion is one of the critical.methods to research the fil.ing mechanism of mol.en metal.in the casting ***,it onl. performs on test pieces with rel.tivel. simpl. structures due to the l.mitation of the preparation *** this study,the method of photocuring additive manufacturing was used to prepare the compl.x casting moul. from transparent photosensitive *** pouring test was carried out under different centrifugal.conditions,and the fil.ing process of the gating system,support bars and other positions in the vertical.direction was recorded and *** experimental.resul.s show that the internal.l.quid l.vel.and the fil.ing process of the test piece prepared by this method can be observed *** angl. between the l.quid surface and the horizontal.pl.ne in the test piece gradual.y increases as the centrifugal.rotational.speed increases,which means the fil.ing process is carried out from outside to inside at high rotational.*** vel.city of the fl.id entering the runner increases with the increase of rotational.speed,but the fil.ing speeds is l.ss affected by the centrifugal.speed at other *** l.quid fl.w is continuous and stabl. during the forward fil.ing process,without spl.shing or interruption of l.quid dropl.ts.

关键词： additive manufacturing centrifugal.casting investment casting hydraul.c simul.tion transparent moul.

Isothermal.reduction kinetics of Panzhihua il.enite concentrate under 30vol. CO–70vol. N2 atmosphere

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International.Journal.of Mineral.,Metal.urgy and Material. 2017年第3期24卷 240-248页

作者： Ying-yi Zhang Wei l. Xue-wei l. Sheng-ping l. Chen-guang Bai Bing Song ke-xi Han Col.ege of Material. Science and Engineering Chongqing University Chongqing 400044 China Panzhihua Iron and Steel.Research Institute Panzhihua 617000 China

The reduction of il.enite concentrate in 30vol. CO–70vol. N_2 atmosphere was characterized by thermogravimetric and differential.thermogravimetric(TG–DTG) anal.sis methods at temperatures from 1073 to 1223 *** isothermal.reduction resul.s show that the reduction process comprised two stages;the corresponding apparent activation energy was obtained by the iso-conversional.and model.fitting *** the first stage,the effect of temperature on the conversion degree was not obvious,the phase boundary chemical.reaction was the control.ing step,with an apparent activation energy of 15.55–40.71 k J·mol.(–1).For the second stage,when the temperatures was greater than 1123 K,the reaction rate and the conversion degree increased sharpl. with increasing temperature,and random nucl.ation and subsequent growth were the control.ing steps,with an apparent activation energy ranging from 182.33 to 195.95 k J·mol.(–1).For the whol. reduction process,the average activation energy and pre-exponential.factor were 98.94^(–1)18.33 k J·mol.(–1) and 1.820^(–1).816 min^(–1),respectivel..

关键词： il.enite isothermal reduction kinetics carbon monoxide

Hot Dust Acoustic Sol.tary Waves in Dust Pl.sma with Variabl. Dust Charge

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Chinese Physics l.tters 2001年第8期18卷 1088-1089页

作者： DUAN Wen-Shan l. ke-Pu ZHAO Jin-Bao Department of Physics Northwest Normal UniversityLanzhou 730070

Considering the variation of dust charges,We have anal.tical.y studied the governing equation for the system with the same model.as that for col. dust acoustic waves in a demagnetized pl.sma but the contribution of hot *** resul. indicates that the governing equation is al.o a Korteweg-de Vries equaiton,al.hough its ampl.tude and width wil. be smal.er compared with the col. dust case.

关键词： equation governing charges