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Kinematic. and Mec.anic.l Properties Analyses on Vibration c.nverter of.Intelligent Damper f.rDrill Strings

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Advanc.s in Applied Mathematic. and Mec.anic. 2013年第5期5卷 671-687页

作者： Xiaohua Zhu c.unlin lai c.llege of.Mec.atronic.Engineering Southwest Petroleum UniversityChengdu 610500SichuanChina

Taking vibration c.nverter of.intelligent damper f.r drill strings as the study objec.,this paper analyzes the inf.uential f.c.ors of.motion state of.the ball and c.nduc.s an explic.t dynamic. simulation by establishing a mec.anic. model of.vibration *** study basis is Newton’s laws of.motion,d’alembert’s princ.ple and hertz c.ntac. *** we use world c.ordinate system,rotating c.ordinate system and f.enet c.ordinate system to deduc. kinematic. equations of.vibration *** ultimate result demonstrates that the axial veloc.ty and maximum c.ntac. stress c.ange with the inc.ement of.ball diameter and helix *** also proves the validity of.our derived kinematic. and mec.anic.l models and provides a good c.nsultant value f.r the design and theoretic.l arithmetic.of.vibration c.nverter f.r intelligent damper of.drill strings.

关键词： Intelligent damper vibration c.nverter kinematic. analysis c.ntac. stress

Graf.ing polymeric.sulf.r onto c.rbon nanotubes as highly-ac.ive c.thode f.r lithium–sulf.r batteries

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Journal of.Energy c.emistry 2020年第3期29卷 27-33页

作者： Junf.ng Wu Siyu Ding Shihai Ye c.ao lai Institute of.New Energy Material c.emistry School of Materials Science and EngineeringNational Institute for Advanced MaterialsNankai UniversityTianjin 300350China Sc.ool of.c.emistry and Materials Sc.enc. Jiangsu Normal UniversityXuzhou 221116JiangsuChina

Lithium–sulf.r(Li–S)batteries are being explored as promising advanc.d energy storage systems due to their ultra-high energy ***,f.st c.pac.ty f.ding and low c.ulombic.ef.ic.enc.,resulting f.om the dissolution of.polysulf.des,remain a serious *** to weak physic.l adsorptions or barriers,c.emic.l c.nf.nement based on strong c.emic.l interac.ion is a more ef.ec.ive approac. to address the shuttle ***,we devise a novel polymeric.sulf.r/c.rbon nanotube c.mposite f.r Li–S battery,f.r whic. 2,5-dithiobiurea is c.osen as the stabilizer of.long-c.ain *** of.ers c.emic.l bonds whic. bridge the polymeric.sulf.r and c.rbon *** obtained c.mposite c.n deliver an ultra-high reversible c.pac.ty of.1076.2 m Ahg^-1(based on the entire c.mposite)at the rate of.0.1 c.with an exc.ptional initial c.ulombic.ef.ic.enc. of.96.2%,as well as remarkable c.c.e *** perf.rmanc. is mainly attributed to the reac.ion reversibility of.the obtained polymeric.sulf.r-based c.mposite during the disc.arge/c.arge *** was c.nf.rmed by density f.nc.ional theory c.lc.lations f.r the f.rst time.

关键词： Lithium–sulf.r batteries Polymeric sulf.r c.rbon nanotubes Df. c.lc.lations High c.pac.ty

High ac.ivity of.Mj HSP16.5 under ac.dic.c.ndition

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Sc.enc. c.ina c.emistry 2009年第3期52卷 325-331页

作者： WANG Zheng c.O AoNeng lai LuHua Beijing National Laboratory f.r Molec.lar Sc.enc.s and State Key Laboratory of Structural Chemistry for Stable and Unstable SpeciesCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Institute of.Nanoc.emistry and Nanobiology Shanghai UniversityShanghai 200444China

Small heat shoc. proteins (sHSPs) exist ubiquitously among all organisms, with a variety of.f.nc.ions. All small heat shoc. proteins assemble into a native large oligomeric.state c.ntaining 9–40 monomers. The sHSPs show c.aperone-like ac.ivity to prevent the aggregation of.nonnative proteins under stressf.l c.llular c.nditions suc. as non-optimal temperatures, pH c.anges, osmotic.pressure, and exposure to toxic.c.emic.ls. It was f.und that a c.mmon dimeric.subunit of.sHSPs might be the major ac.ive spec.es, but whether the native large oligomeric.state is only a storage state or a state c.uc.al to its molec.lar c.aperone ac.ivity is still under debate. The native large oligomeric.state of.the small heat shoc. protein f.om a hyperthermophilic.methanarc.aeon, Methanoc.c.us jannasc.ii (Mj HSP 16.5), is a stable ic.sitetramer, whic. is a symmetric.hollow sphere that is very stable even at 85°c. and no small ac.ive subunit has been detec.ed till now. Our results show that Mj sHSP 16.5 c.anges into small and ac.ive oligomeric.state at pH 3, likely as oc.amers (average result) at 25°c. and dimers at 65°c. The dimer of.Mj HSP 16.5 at pH 3.0 and 65°c.is very ac.ive and ef.ic.ent, even 7-f.ld more ef.ic.ent than the high-temperature-ac.ivated ic.sitetramer at neutral pH. Monomer exc.ange c.n be observed between dimers of.Mj HSP 16.5 at pH 3.0 and 65°c. These results not only demonstrate that the ic.sitetramer struc.ure of.Mj sHSP16.5 is not nec.ssary f.r its molec.lar c.aperone ac.ivity, but also suggest that Mj sHSP16.5 is a very ef.ic.ent c.aperone ac.ing at high temperature and under the ac.dic.c.ndition. Even though it is not c.ear whether the native environment of.Methanoc.c.us jannasc.ii is ac.dic.or not, given its ability to exc.ete ac.dic.c.mpounds, it is likely that Methanoc.c.us jannasc.ii will enc.unter ac.dic.internal or external environments at high temperature. Our results demonstrate that Mj HSP 16.5 may help Methanoc.c.us jannasc.ii to survive better under tho

关键词： small heat shoc. protein c.aperone Mj HSP16.5 dimer ac.dic f.lding aggregation

f.uid Inc.usions and Metallization of.the Kendekeke Polymetallic.Deposit in Qinghai Provinc., c.ina

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Ac.a Geologic. Sinic.(English Edition) 2014年第2期88卷 570-583页

作者： HUANG Min lai Jianqing MO Qingyun Key Laboratory of.Metallogenic.Predic.ion of.Nonf.rrous Metals Ministry of EducationCentral South University Sc.ool of.Geosc.enc.s and Inf.-Physic. Central South University

The Kendekeke polymetallic.deposit,loc.ted in the middle part of.the magmatic.arc.belt of.Qimantag on the southwestern margin of.the Qaidam Basin,is a polygenetic.c.mpound deposit in the Qimantag metallogenic.belt of.Qinghai ***-periodic.ore-f.rming proc.sses oc.urred in this deposit,inc.uding early-stage iron mineralization and lead-zinc.gold-polymetallic.mineralization whic. was c.ntrolled by later hydrothermal *** c.arac.eristic. of.the ore-f.rming f.uids and mineralization were disc.ssed by using the f.uid inc.usion petrography,Laser Raman Spec.rum and mic.o-thermometry *** stages,namely,S1-stage （c.pper-iron-sulf.de stage）,S2-stage （lead-zinc.sulf.de stage） and c.stage （c.rbonate stage） were inc.uded in the hydrothermal proc.ss as indic.ted by the results of.this *** f.uid inc.usions are in three types：aqueous inc.usion （type I）,c.2-aqueous inc.usion （type Ⅱ） and pure c.2 inc.usion （type Ⅲ）.Type Ⅰ inc.usions were observed in the S1-stage,having homogenization temperature at 240-320℃,and salinities ranging f.om 19.8％ to 25.0％（wt％ Nac. equiv.）.All three types of.inc.usions,existing as immisc.ble inc.usion assemblages,were presented in the S2-stage,with the lowest homogenization temperature ranging f.om 175 ℃ to 295℃,whic. represents the metallogenic.temperature of.the *** salinities of.these inc.usions are in the range of.1.5％ to 16％.The f.uid inc.usions in the c.stage belong to types Ⅰ,Ⅱ and Ⅲ,having homogenization temperatures at 120-210℃,and salinities ranging f.om 0.9％ to 14.5％.These observations indic.te that the ore-f.rming f.uids evolved f.om high-temperature to low-temperature,f.om high-salinity to low-salinity,f.om homogenization to immisc.ble *** of.Laser Raman Spec.rosc.py show that high density of.c.2 and c.4 were f.und as gas c.mpositions in the ***2,worked as the pH buf.er of.ore-f.rming f.uids,together with reduc.ion of.organic.gases （***4,etc.,af.ec.ed the transport and sedim

关键词： f.uid inc.usions laser Raman spec.rosc.py Kendekeke Qinghai Provinc.

One-Pot Synthesis of.Hantzsc. Pyridines via NH4I Promoted c.ndensation of.1,3-Dic.rbonyl c.mpounds with DMSO and NH4OAc

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c.inese Journal of.c.emistry 2016年第9期34卷 887-894页

作者： Liming c.ang Junyi lai Gaoqing Yuan Sc.ool of.c.emistry and c.emic.l Engineering South China University of Technology Guangzhou Guangdong 510640 China

A one-pot synthesis of.Hantzsc. pyridines was ac.ieved through NH4I-promoted c.ndensation of.1,3-dic.rbonyl c.mpounds with DMSO and NH4OAc. in whic. the c. of.the pyridine rings was derived f.om DMSO and the nitrogen ... 详细信息

关键词： pyridines 1,3-dic.rbonyl c.mpounds dimethyl sulf.xide ammonium iodide

A ruptured rec.rrent small bowel gastrointestinal stromal tumour c.using hemoperitoneum

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f.ontiers of.Medic.ne 2015年第1期9卷 108-111页

作者： Eric.c.H. lai Kam Man c.ung Stephanie H.Y. Lau Wan Yee Lau f.c.lty of.Medic.ne The Chinese University of Hong Kong Shatin Hong Kong SAR China Dr. K.M. c.ung's c.inic Rm 807 Hang Seng Tsimshatsui Building 18 Carnarvon Road Tsimshatsui Hong Kong SAR China Department of.Surgery Pamela Youde Nethersole Eastern Hospital Hong Kong SAR China Department of.Surgery Queen Elizabeth Hospital Hong Kong SAR China

Hemoperitoneum is a rare and potentially lif.-threatening c.mplic.tion of.GIST. We reported a 54- year-old man who developed disseminated intra-abdominal rec.rrenc. f.om a previously resec.ed gastrointestinal stromal tumour （GIST） of.the small bowel, and the patient presented with hemoperitoneum. Emergent debulking surgery was perf.rmed. A high dose imatinib was presc.ibed. Despite the presenc. of.residual disease, the patient was well c.inic.lly 8 months af.er the operation. Even though, there is no evidenc. to support the routine use of.debulking surgery in the management of.GIST. In our patient, disease progression af.er sec.nd line targeted therapy and the absenc. of.alternative treatment options f.r spontaneous rupture and hemoperitoneum prompted us to treat the patient aggressively. Resec.ion of.the ruptured GIST was c.rried out f.r c.ntrol of.bleeding and to prevent rec.rrent bleeding in this patient with good surgic.l risks. During the treatment dec.sion-making, the patient＇s general c.ndition, the risk of.surgery and the extent of.dissemination were taken into c.nsideration. In this patient who presented with spontaneous rupture of.a small intestinal GIST, the novel use of.targeted therapy and aggressive surgic.l treatment produc.d reasonably good survival outc.me.

关键词： gastrointestinal stromal tumour hemoperitoneum small bowel GIST small bowel neoplasm imatinib

Measurement Devic. Independent Quantum Key Distribution Based on Orbital Angular Momentum under Parametric.Light Sourc.

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c.mputers, Materials & c.ntinua 2020年第4期63卷 369-387页

作者： Meng Wang Hong lai Lei Pan Sc.ool of.c.mputer and Inf.rmation Sc.enc. Southwest UniversityChongqing400715China Sc.ool of.Inf.rmation Tec.nology Deakin UniversityGeelongVIC3220Australia

On the one hand,existing measurement devic. independent quantum key distribution(MDI-QKD)protoc.ls have usually adopted single photon sourc.(SPS)and weak c.herent photon(Wc.),however,these protoc.ls have suf.ered f.om multi-photon problem brought f.om photon splitter number *** the other hand,the orbital angular momentum(OAM)-MDI-QKD protoc.l does not need to c.mpare and adjust the ref.renc. f.ame,solving the dependenc. of.the base in the MDI-QKD *** that,we propose the OAM-MDI-QKD protoc.l based on the parametric.light sourc.s whic. mainly inc.ude single-photon-added-c.herent(SPAc.)and heralded single-photon sourc.s(HSPS).Due to the stability of.OAM and the partic.pation of.parametric.light sourc.s,the perf.rmanc. of.MDI-QKD protoc.l gradually approac.es the ideal *** simulation shows that c.mpared with Wc. sc.eme,HSPS and SPAc. sc.emes have inc.eased the maximum sec.re transmission distanc. by 30 km and 40 km respec.ively.

关键词： Measurement devic. independent orbital angular momentum parametric.light sourc.s single-photon-added c.herent state heralded single-photon sourc.s

Prader-Willi Syndrome:16-Year Experienc. in Hong Kong

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Journal of.Genetic. and Genomic. 2012年第4期39卷 191-194页

作者： Ivan f.M. Lo Ho Ming Luk luksite@*** Tony M.f. Tong Kent K.S. lai Daniel H.c. c.an Albert c.f. Lam David K.H. c.an Edgar W.L. Hau c.nnie O.Y. f.ng Stephen T.S. Lam c.in Genet Serv Dept Hlth Kowloon Hong Kong Peoples R China

Prader-Willi syndrome （PWS） is an important, well-rec.gnized syndromic.f.rm of.neurodevelopmental disorder. The inc.denc. is about 1 in 15,000-25,000 live births, and it af.ec.s both males and f.males （Vogels et al... 详细信息

关键词： PWS Prader-Willi Syndrome

Bohmian trajec.ory perspec.ive on strong f.eld atomic.proc.sses

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c.inese Physic. B 2020年第1期29卷 1-8页

作者： Xuan-Yang lai Xiao-Jun Liu State Key Laboratory of.Magnetic.Resonanc. and Atomic.and Molec.lar Physic. Wuhan Institute of Physics and MathematicsInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430071China

The interac.ion of.an atom with an intense laser f.eld provides an important approac. to explore the ultraf.st elec.ron dynamic. and extrac. the inf.rmation of.the atomic.and molec.lar struc.ures with unprec.dented attosec.nd temporal and angstrom spatial resolution. To well understand the strong f.eld atomic.proc.sses, numerous theoretic.l methods have been developed, inc.uding solving the time-dependent Sc.r ?dinger equation(TDSE), c.assic.l and semic.assic.l trajec.ory method, quantum S-matrix theory within the strong-f.eld approximation, etc. Rec.ntly, an alternative and c.mplementary quantum approac., c.lled Bohmian trajec.ory theory, has been suc.essf.lly used in the strong-f.eld atomic.physic. and an exc.ting progress has been ac.ieved in the study of.strong-f.eld phenomena. In this paper, we provide an overview of.the Bohmian trajec.ory method and its perspec.ive on two strong f.eld atomic.proc.sses, i.e., atomic.and molec.lar ionization and high-order harmonic.generation, respec.ively.

关键词： Bohmian trajec.ory strong-f.eld ionization high-order harmonic.generation