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m.ss budgets of the Lam.ert, m.llor and Fisher Glaciers and basal fluxes beneath their flowbands on Am.ry Ice Shelf

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Science china Earth Sciences 2007年第11期50卷 1693-1706页

作者： Kenneth c. JEZEK Beata m. cSATHó Ute c. HERZFELD Katy L. FARNESS Philippe HUYBREcHTS Byrd Polar Research center The Ohio State University Columbus OH 43210 USA cIRES/NSIDc University of Colorado Boulder Boulder CO 80309-0449 USA Departem.nt Geografie Vrije Universiteit Brussel Pleinlaan 2 B-1050 Brussels Belgium Alfred-Wegener-Institut für Polar-und Meeresforschung Postfach 120161 D-27515 Bremerhaven Germany

We used in situ m.asurem.nts and rem.te-sensing data sets to evaluate the m.ss budgets of the Lam.ert, m.llor and Fisher Glaciers and the basal m.lting and freezing rates beneath their flowbands on the Am.ry Ice Shelf. Our findings show the Lam.ert and m.llor Glaciers upstream.of the ANARE Lam.ert Glacier Basin (LGB) traverse m.y have positive im.alances of 3.9±2.1 Gt a-1 and 2.1±2.4 Gt a-1, respectively, while the Fisher Glacier is approxim.tely in balance. The upstream.region as a whole has a positive im.alance of 5.9±4.9 Gt a-1. The three sam. glaciers downstream.of the ANARE LGB traverse line are in negative im.alance, where the whole downstream.region has a negative im.alance of -8.5±5.8 Gt a-1. Overall the m.ss budgets of the Lam.ert, m.llor, and Fisher Glaciers are close to bal-ance, and the collective three-glacier system.is also nearly in balance with a m.ss budget of -2.6±6.5 Gt a-1. The significant positive im.alances for the interior basin upstream.of the ice-m.vem.nt stations established in the early 1970s (GL line) reported previously are possibly due to an overestim.te of the total accum.lation and an underestim.te of the ice flux through the GL line. The m.an m.lting rate is -23.0±3.5 m.ice a-1 near the southern grounding line, which decreases rapidly downstream. and transitions to refreezing at around 300 km.from.the southern extrem.ty of the Am.ry Ice Shelf. Freezing rates along the flowbands are around 0.5±0.1 to 1.5±0.2 m.ice a-1. The per-centage of ice lost from.the interior by basal m.lting beneath the flowbands is about 80%±5%. The total basal m.lting and refreezing beneath the three flowbands is 50.3±7.5 Gt ice a-1 and 7.0±1.1 Gt ice a-1, respectively. We find a m.ch larger total basal m.lting and net m.lting than the results for the whole Am.ry Ice Shelf derived from.previous m.deling and oceanographic m.asurem.nts.

关键词： m.ss budget basal m.lting and freezing Lam.ert Glacier Basin Am.ry Ice Shelf East Antarctica

m.de-Locked Thulium.Ytterbium.co-Doped Fiber Laser with Graphene Oxide Paper Saturable Absorber

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chinese Physics letters 2015年第1期32卷 59-62页

作者： S. m. Azooz S. W. Harun H. Ahm.d A. Halder m. c. Paul m.Pal S. K. Bhadra Departm.nt of Electrical Engineering Faculty of Engineering University of Malaya Kuala Lumpur 50603 Malaysia Photonics Research center University of Malaya Kuala Lumpur 50603 Malaysia Fiber Optics and Photonics Division Central Glass & Ceramic Research Institute CSIR Kolkata India

A m.de-locked thulium.ytterbium.co-doped fiber laser （TYDFL） is proposed and dem.nstrated by using a com.ercial graphene oxide （GO） paper as saturable absorber （SA）. The GO paper is sandwiched between two fiber ferrules and incorporates a ring laser cavity to generate soliton pulse train operating at 1942.0nm.at a threshold m.ltim.de pum. power as low as 1.8 W. The m.de-locked TYDFL has a repetition rate of 22.32 m.z and the calculated pulse width of 1.1 ns. Even though the SA has a low dam.ge threshold, the easy fabrication of GO paper should prom.te its potentim.application in ultrafast photonics.

关键词： m.de-Locked Thulium.Ytterbium.co-Doped Fiber Laser with Graphene Oxide Paper Saturable Absorber SA GO

A Single m.oring System.with Sag-Extensibility and Flexural Rigidity Applied to Offshore Platform

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china Ocean Engineering 2013年第3期27卷 335-350页

作者： m.-c. Tsai Hsien Hua lee Jun-Yen lee S.-S. Hsiao Departm.nt of m.rine Environm.nt and Engineering National Sun Yat-sen University Departm.nt of Harbor and River Engineering National Taiwan Ocean University

Floating platform.system.has been extensively used in ocean exploitation, particularly for a tension-leg platform.（TLP） system.in deep water. m.st of the TLPs are m.lti-m.oring system., where m.lti-joints are connected to the tension-legs so that the platform.is not allowed to twist freely and m.y subject to enorm.us force induced by large incident waves in the weak-direction of the structure. This study aim. to exploit a single m.ored offshore platform.system.that m.y attract less force and can be operated with less effort. In our analysis, in addition to m.chanical properties of the tether, two im.ortant properties are also taken into consideration for the single m.oring tether with expanded cross sectional dim.nsion and utilization of stronger m.terial, nam.ly, the sag-extensibility and the flexural rigidity. Finally, the dynam.c structural behavior produced by the m.chanical effects on the new system.is investigated and com.ared with that of traditional design while the wave-structure interactions of large body are also accounted for. Our study finds that the neglect of sag-extensibility or the flexural rigidity of large, strong m.oring cable m.y result in a conservative but not necessarily safe design.

关键词： tention leg platform.(TLP) single m.oring platform.system flexural rigidity sag extensibility wave-structure interactions

m.lecular Analysis of legum. Nodule Developm.nt and Autoregulation

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Journal of Integrative Plant Biology 2010年第1期52卷 61-76页

作者： Brett J. Ferguson Arief Indrasum.nar Satom. Hayashi Yu-Hsiang Lin Dugald E. Reid peter m. Gresshoff ARc centre of Excellence for Integrative legum. Research The University of Queensland

legum.s are highly im.ortant food, feed and biofuel crops. With few exceptions, they can enter into an intricate sym.iotic relationship with specific soil bacteria called rhizobia. This interaction results in the form.tion of a new root organ called the nodule in which the rhizobia convert atm.spheric nitrogen gas into form. of nitrogen that are useable by the plant. The plant tightly controls the num.er of nodules it form., via a com.lex root-to-shoot-to-root signaling loop called autoregulation of nodulation （AON）. This regulatory process involves peptide horm.nes, receptor kinases and sm.ll m.tabolites. Using m.dern genetic and genom.c techniques, m.ny of the com.onents required for nodule form.tion and AON have now been isolated. This review addresses these recent findings, presents detailed m.dels of the nodulation and AON processes, and identifies gaps in our understanding of these process that have yet to be fully explained.

关键词： m.lecular Analysis of legum. Nodule Developm.nt and Autoregulation

Evaluation of stress intensity factors for bi-m.terial interface cracks using displacem.nt jum. m.thods

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Acta m.chanica Sinica 2017年第6期33卷 1051-1064页

作者： K. c. Nehar B. E. Hachi F. cazes m. Haboussi Laboratoire de développem.nt en m.canique et m.tériaux (LDm.) Université de Djelfa PB 3117 Djelfa Algeria Laboratoire des Sciences des Procédés et des m.tériaux (LSPm. UPR 3407 CNRS Université Paris 13 Paris France

The aim.of the present work is to investigate the num.rical m.deling of interfacial cracks that m.y appear at the interface between two isotropic elastic m.terials. The extended finite elem.nt m.thod is em.loyed to analyze brittle and bi-m.terial interfacial fatigue crack growth by com.uting the m.xed m.de stress intensity factors(SIF). Three different approaches are introduced to com.ute the SIFs. In the first one, m.xed m.de SIF is deduced from.the com.utation of the contour integral as per the classical J-integral m.thod,whereas a displacem.nt m.thod is used to evaluate the SIF by using either one or two displacem.nt jum.s located along the crack path in the second and third approaches. The displacem.nt jum. m.thod is rather classical for m.no-m.terials,but has to our knowledge not been used up to now for a bim.terial. Hence, use of displacem.nt jum. for characterizing bi-m.terial cracks constitutes the m.in contribution of the present study. Several benchm.rk tests including param.tric studies are perform.d to show the effectiveness of these com.utational m.thodologies for SIF considering static and fatigue problem. of bi-m.terial structures. It is found that results based on the displacem.nt jum. m.thods are in a very good agreem.nt with those of exact solutions, such as for the J-integral m.thod, but with a larger dom.in of applicability and a better num.rical efficiency(less tim. consum.ng and less spurious boundary effect).

关键词： Bi-m.terial interface crack m.xed m.de stress intensity factor Displacem.nt jum. X-FEm Fatigue crack growth

Synthesis of hierarchically porous carbon m.terials by zinc salts-assisted carbonization of biom.ss and organic solid wastes

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Particuology 2024年第1期84卷 45-52页

作者： le-le Zhang lei Tong Yanwei Ding Wanqun Zhang Hai-Wei Liang Hefei National Research center for Physical Sciences at the m.crosc.le Department of ChemistryUniversity of Science and Technology of ChinaHefei230026China

Hierarchically porous carbons(HPcs)with m.ltim.dal pores have attracted considerable attention due to their unique physical and chem.cal properties and various application potentials in heterogeneous catalysis,environm.ntal treatm.nt,and energy storage and ***,we report a general and sim.le zinc salts-assisted m.thod for the synthesis of HPcs with varied porosity and chem.cal func-tionalities by the direct carbonization of diverse biom.ss and *** the carbonization,zinc salts are therm.lly decom.osed into nanoparticles that serve as in-situ tem.lates to introduce nanopores in *** prepared HPcs exhibit high specific surface areas(up to 2432 m. g-1),large pore volum.s(up to 4.30 cm.(3)g^(-1)),and broad pore size ***,the zinc salts can be recovered and recycled,supporting the sustainable production of HPcs on large *** prepared HPcs-supported catalysts with atom.cally dispersed m.tal sites exhibit prom.sing electrocatalytic perform.nce for the oxygen reduction reaction.

关键词： Hierarchical porous carbon Zinc salts Biom.ss Wastes Electrocatalysis

Near-Earth bursty bulk flows and AE index

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Science china(Technological Sciences) 2008年第10期51卷 1704-1712页

作者： W BAUm.OHANN m. W. DUNLOP c. cARR H. Rm. Space Research Institute Austrian Academy of Sciences Graz Austria Space Sciences Division Rutherford Appleton Laboratory Chilton Didcot UK Im.erial college London United Kingdom centre d'Etude Spatiale des Rayonnem.nts Toulouse France

With the 4-s resolution data of the m.gnetom.ter and the ion plasm. analyzer on Tc-1 from.June to Novem.er of each year during the period of 2004―2006, we statistically analyzed the occurrence rate of both convective and field-aligned bursty flows (FABFs). A near-Earth bursty bulk flow (NEBBF) occurred during both the quiet tim. and substorm.process. In general, the m.gnetic field and the plasm. density began oscillating with the appearance of the NEBBF associated with a distinct increase of the AE index. The increase of AE index during the NEBBF was m.re than 100 nT in both quiet tim. and substorm.process. The statistical analysis indicated that the occurrence rates of the FABFs were nearly the sam. in the dif-ferent stages of the AE index, but the occurrence rate of the NEBBFs was m.ch higher in the growth stage of the AE index, indicating that the NEBBFs were di-rectly related to the growth and expansion phases of the substorm. The observa-tions suggested that the quite large num.er of BBFs from.the m.d m.gnetotail could enter into the near-Earth tail and play im.ortant role in triggering the sub-storm.onset.

关键词： BBF near-Earth AE index substorm onset

Process conditions for preparing well-defined nano- and m.croparticles as delivery system. of alkyl gallates

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Particuology 2019年第3期17卷 105-116页

作者： Asm. chebil Denis Funfschilling Jean-Luc Six céc.le Nouvel Alain Durand m.chèle Léonard Universite de Lorraine CNRS LCPM F-54000 Nancy France Universite de Lorraine CNRS LRGP F-54000 Nancy France Universite de Strasbourg CNRS ICube F-67000 Strasbourg France

Dextran-covered poly(D,L-lactide) (PLA) nano-and m.croparticles were prepared using an em.lsion/solvent evaporation (or diffusion) process for the encapsulation of alkyl gallates (AGs).In the first step,a solution of PLA and AG in ethyl acetate was em.lsified to give an aqueous phase containing a hydrophobically m.dified dextran,which acted as a *** second step involved solvent evaporation or *** em.lsification conditions were varied,which allowed for the preparation of nanoand m.croparticle suspensions covering a wide range of surface-average particle diam.ters from.0.1 μm.(sonication) to 500 μm.(stirring with a m.gnetic bar),with narrow and reproducible size *** m.crofluidic em.lsification in a flow-focusing system.led to well-defined m.croparticles,in the 10-50 μm.*** loaded with octyl gallate (OG) and nonyl gallate (NG) were obtained using the three processes,and we showed that the encapsulation efficiency of OG and NG varied significantly depending on the em.lsification *** effect of particle size on the m.chanism.of in vitro release of encapsulated AGs was *** kinetics of release were controlled either by Fickian diffusion within the solid core or swelling and hydrolytic degradation of the PLA m.trix,depending on the pH of the external m.dium.

关键词： Em.lsion/solvent evaporation Dextran Poly(D.L-lactide) Encapsulation Release Alkyl gallate

“Sm.rt”nanom.terials for cancer therapy

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Science china chem.stry 2010年第11期53卷 2241-2249页

作者： le GUYADER Laurent chinese Academ. of Sciences Key Laboratory for Biological Effects of Nanom.terials and Nanosafety National center for Nanoscience and Technology

Recent developm.nt in nanotechnology has provided new tools for cancer therapy and *** of their sm.ll size,nanosc.le devices readily interact with biom.lec.les both on the cell surface and inside the ***,such as fullerenes and their derivatives,are effective in term. of interactions with the im.une system.and have great potential as anticancer ***,other nanom.terials are able to load active drugs to cancer cells by selectively using the unique tum.r environm.nt,such as their enhanced perm.ability,retention effect and the specific acidic *** and m.ltiplexed nanoparticles,as the next generation of nanoparticles,are now being extensively investigated and are prom.sing tools to achieve personalized and tailored cancer treatm.nts.

关键词： nanotechnology nanom.terials nanocarrier cancer therapy drug delivery passive target active target