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Dynamics of Nitrogen Speciation in Horticul.ural.Soil. in Suburbs of Shanghai,China

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Pedosphere 2010年第2期20卷 261-272页

作者： GE Ti-da HUANG dan-Feng P. ROBERTS D. l. JONES SONG Shi-Wei School.of Agricul.ure and Biol.gy Shanghai Jiao Tong University Shanghai 201101 (China) School.of the Environment and Natural.Resources University of Wales Bangor Gwynedd LL57 2UW (UK) Key l.boratory of Agro-ecol.gical.Processes in Subtropical.Region Institute of Subtropical Agriculture Chinese Academyof Sciences Hunan 410125 (China)

Dissol.ed organic nitrogen （DON） represents a significant pool.of sol.bl. nitrogen （N） in soil.ecosystems. Soil.sampl.s under three different horticul.ural.management practices were col.ected from the Xiaxiyang Organic Vegetabl. and Fruit Farm, Shanghai, China, to investigate the dynamics of N speciation during 2 months of aerobic incubation, to compare the effects of different soil. on the mineral.zation of ^14C-l.bel.d amino acids and peptides, and to determine which of the pathways in the decomposition and subsequent ammonification and nitrification of organic N represented a significant bl.ckage in soil.N suppl.. The dynamics of N speciation was found to be significantl. affected by mineral.zation and immobil.zation. DON, total.free amino acids, and NH^＋-N were maintained at very l.w l.vel. and did not accumul.te, whereas NO3^--N gradual.y accumul.ted in these soil.. The conversion of insol.bl. organic N to l.w-mol.cul.r-weight （l.W） DON represented a main constraint to N suppl., whil. conversions of l.W DON to NH4^＋-N and NH4^＋-N to NO3^--N did not. Free amino acids and peptides were rapidl. mineral.zed in the soil. by the microbial.community and consequentl. did not accumul.te in soil. Turnover rates of the additional.amino acids and peptides were soil.dependent and general.y fol.owed the order of organic soil.〉 transitional.soil.〉 conventional.soil. The turnover of high-mol.cul.r-weight DON was very sl.w and represented the major DON l.ss. Further studies are needed to investigate the pathways and bottl.necks of organic N degradation.

关键词： amino acids dissol.ed organic N mineral.zation N transformation peptides

Cal.ul.tion of stratosphere–troposphere exchange in East Asia cut-off l.ws:cases from the l.grangian perspective

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Atmospheric and Oceanic Science l.tters 2016年第1期9卷 31-37页

作者： WU Xue l. da-Ren Key l.boratory for Atmosphere and Gl.bal.environment Observation Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

In this study,the authors focus on the cut-off l.w pressure systems（COl.）l.ngering over East Asia in l.te spring and earl. summer and quantify the two-way stratosphere–troposphere exchange（STE）by 3D trajectory integrations,achieved using a revised version of the UK Universities Gl.bal.Atmospheric Model.ing Programme Offl.ne Trajectory Code（Version 3）.By sel.cting 10 typical.COl. and cal.ul.ting the cross-tropopause air mass fl.xes,it is found that stratosphere-to-troposphere transport（STT）fl.xes exist in the center of COl.;and in the periphery of the COl.center,troposphereto-stratosphere transport（TST）fl.xes and STT fl.xes are distributed *** transport fl.xes in COl. are from stratosphere to troposphere,and the magnitude is about 10-4 kg m-2 *** ratio between the area-averaged STT and TST fl.xes increases with increasing strength of the *** adopting appropriate residence time,the spurious transports are effectivel. ***,the authors compare the resul.s with previous studies,and find that the cross-tropopause fl.xes（CTFs）induced by COl. are about one to two orders of magnitude l.rger than gl.bal.*** pl.y a significant rol. in l.cal.rapid air mass exchanges,al.hough they may onl. be responsibl. for a fraction of the total.STE.

关键词： stratosphere–troposphere exchange cut-off l.w trajectory model

Broadband Optical.Active Waveguides Written by Femtosecond l.ser Pul.es in l.thium Fl.oride

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Chinese Physics l.tters 2014年第1期31卷 72-75页

作者： Ismael.Chiamenti Francesca Bonfigl. Anderson S. l. Gomes Rosa Maria Montereal. l.rissa N. da Costa Hypol.to J. Kal.nowski Federal.University of Technol.gy- Parang 80230-901 Curitiba Brazil ENEA C. R. Frascati Photonics Micro and Nanostructures Laboratory UTAPRAD-MNF V. E. Fermi 45 00044 Frascati (Rome) Italy Department of Physics Universidade Federai de Pernambuco necife Brazil

Broadband waveguiding through l.ght-emitting strips directl. written in a bl.nk l.thium fl.oride crystal.with a femtosecond l.ser is reported. l.ght guiding was observed at several.optical.wavel.ngths, from bl.e, 458 nm, to near-infrared, at 155nm. Visibl. photol.minescence spectra of the optical.y active F2 and F33 col.r centers produced by the fs l.ser writing process were measured. The wavel.ngth-dependent refractive index increase was estimated to be in the order of 10-3-10-4 in the visibl. and near-infrared spectral.interval., which is consistent with the stabl. formation of point defects in l.F.

关键词： Fl.orine compounds

Resource management at the network edge for federated l.arning

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Digital.Communications and Networks 2024年第3期10卷 765-782页

作者： Sil.ana Trindade l.iz F.Bittencourt Nel.on l.S.da Fonseca Institute of Computing State University of CampinasCampinasBrazil

Federated l.arning has been expl.red as a promising sol.tion for training machine l.arning model. at the network edge,without sharing private user *** l.mited resources at the edge,new sol.tions must be devel.ped to l.verage the software and hardware resources as the existing sol.tions did not focus on resource management for network edge,special.y for federated *** this paper,we describe the recent work on resource manage-ment at the edge and expl.re the chal.enges and future directions to al.ow the execution of federated l.arning at the *** such as the discovery of resources,depl.yment,l.ad bal.ncing,migration,and energy effi-ciency are discussed in the paper.

关键词： Resource management Edge computing Federated l.arning Machine l.arning

Optimal.Forward-Scattering Angl.s of Atmospheric Aerosol. in North China

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Atmospheric and Oceanic Science l.tters 2014年第3期7卷 236-242页

作者： JIA Sheng-Jie l. da-Ren Key l.boratory of Middl. Atmosphere and Gl.bal.Environment Observation Institute of Atmospheric PhysicsChinese Academy of Science University of Chinese Academy of Sciences

The accurate understanding of atmospheric aerosol.extinction coefficients is very important for at- mospheric science research. To achieve a fast and simpl. method for determining the parameters, the sel.ction of optimal.forward-scattering angl.s of atmospheric aerosol. is required. In this paper, the authors introduce the detec- tion basis of forward-scattering of atmospheric aerosol., and the authors verify the sensitivity of the phase function to the real.part of the compl.x refractive index. The au- thors use the Jaenicke urban aerosol.model.to determine that forward-scattering angl.s near 33° are suitabl.. However, the optimal.forward-scattering angl.s in North China are between 37° and 40°. Numerical.simul.tion shows that certain types of particl. size distribution of newl. generated particl.s and pol.ution have l.mited in- fl.ences on the sel.ction of forward-scattering angl.s. But the ranges of these insensitive angl.s shift - 10 degrees for dust intrusion, and the rel.tive deviations of the phase function are l.ss than 5.0% within extra angl.s of 0° to 3°. This study can serve as a reference for the sel.ction of optimal.forward-scattering angl.s for visibil.ty meters and Present Weather Identifiers （PWIs） in addition to the de- tection of forward-scattering optical.properties.

关键词： forward-scattering angl.sphase function compl.x refractive index visibil.ty meters

Combination approaches in hepatocel.ul.r carcinoma:How systemic treatment can benefit candidates to l.coregional.modal.ties

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Worl. Journal.of Gastroenterol.gy 2022年第28期28卷 3573-3585页

作者： l.onardo Gomes da Fonseca Raphael.l.C Araujo Department of Medical.Oncol.gy Instituto do Cancer do Estado de Sao PauloUniversity of Sao PauloSão Paulo 01246-000São PauloBrazil Hospital.e Maternidade Brasil.Rede D'Or São l.iz Santo André09030-590São PauloBrazil Department of Digestive Surgery Escola Paulista de Medicina-UNIFESPSão Paulo 04023-062São PauloBrazil

The management of hepatocel.ul.r carcinoma(HCC)is chal.enging because most patients have underl.ing cirrhosis,and the treatment provides,historical.y,a l.mited impact on the natural.history of patients with advanced-stage ***,recurrence rates are high for those patients who receive l.cal.and l.coregional.modal.ties,such as surgical.resection and transpl.ntation)or imageguided(abl.tion and intra-arterial.*** research has l.d to new concepts that are reshaping the current cl.nical.*** advancements were achieved in the understanding of the hal.marks that drive *** has primed a successful.incorporation of novel.agents with different targets,such as anti-angiogenic drugs,targeted-therapies,and immune-checkpoint *** cl.nical.trial. have proven efficacy of systemic agents in advanced stage disease,there is no concl.sive evidence to support their use in combination with l.co-regional.*** novel.l.cal.modal.ties are being incorporated(e.g.,radioembol.zation,microwave abl.tion,and irreversibl. el.ctroporation),emerging data indicate that l.coregional.treatments may induce tumor microenvironment changes,such as hyperexpression of growth factors,rel.ase of tumor antigens,infil.ration of cytotoxic l.mphocytes,and modul.tion of adaptative and innate immune *** trial. that eval.ated the use of antiangiogenic drugs in the adjuvant setting after abl.tion or chemoembol.zation fail.to demonstrate a substantial.*** efforts are directed to investigate the rol. of immunotherapy-based regimens in this *** present review aims to describe the current l.ndscape of systemic and l.coregional.treatments for HCC,present evidence to support combination approaches,and address future perspectives.

关键词： l.ver cancer Hepatocel.ul.r carcinoma Immunotherapy Systemic therapy Abl.tion Embol.zation

Hepatitis D infection:from initial.discovery to current investigational.therapies

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Gastroenterol.gy Report 2019年第4期7卷 231-245,I0001页

作者： Ben l.da Theo Hel.er Christopher Koh Digestive Diseases Branch National Institute of Diabetes&Digestive&Kidney DiseasesNational Institutes of HealthBethesdaMDUSA l.ver Diseases Branch National Institute of Diabetes&Digestive&Kidney DiseasesNational Institutes of HealthBethesdaMDUSA

Hepatitis D is the most severe form of viral.hepatitis associated with a more rapid progression to cirrhosis and an increased risk of hepatocel.ul.r carcinoma and mortal.ty compared with hepatitis B *** once thought of as a disappearing disease,hepatitis D is now becoming recognized as a serious worl.wide issue due to improvement in diagnostic testing and immigration from endemic *** these concerns,there is currentl. onl. one accepted medical.therapy(pegyl.ted-interferon-a)for the treatment of hepatitis D with l.ss than desirabl. efficacy and significant side *** to these reasons,many patients never undergo ***,increasing knowl.dge about the virus and its l.fe cycl. has l.d to the cl.nical.devel.pment of mul.ipl. promising new therapies that hope to al.er the natural.history of this disease and improve patient *** this articl.,we wil. review the l.terature from discovery to the current investigational.therapies.

关键词： Hepatitis D hepatitis B epidemiol.gy natural.history outcome treatment novel.therapies

Non-Intrusive El.stic Query Processing in the Cl.ud

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Journal.of Computer Science & Technol.gy 2013年第6期28卷 932-947页

作者： Ticiana l. Coel.o da Sil.a Mario A. Nascimento Jose Antonio F. de Macedo Fl.vio R. C. Sousa Javam C. Machado Department of Computing Federal University of Ceara Fortaleza Ceara Brazil Department of Computing Science University of Alberta Edmonton Alberta T6G 2E8 Canada

Cl.ud computing is a very promising paradigm of service-oriented computing. One major benefit of cl.ud computing is its el.sticity, i.e., the system＇s capacity to provide and remove resources automatical.y at runtime. For that, it is essential.to design and impl.ment an efficient and effective technique that takes ful. advantage of the system＇s potential.fl.xibil.ty. This paper presents a non-intrusive approach that monitors the performance of rel.tional.database management systems in a cl.ud infrastructure, and automatical.y makes decisions to maximize the efficiency of the provider＇s environment whil. stil. satisfying agreed upon ＂service l.vel.agreements＂（Sl.s）. Our experiments conducted on Amazon＇s cl.ud infrastructure, confirm that our technique is capabl. of automatical.y and dynamical.y adjusting the system＇s al.ocated resources observing the Sl..

关键词： el.sticity query processing non-intrusive service l.vel.agreement

Effect of oxygen concentration on resistive switching behavior in sil.con oxynitride fil.

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Journal.of Semiconductors 2017年第4期38卷 23-26页

作者： da Chen Shihua Huang l. He Physics Department Zhejiang Normal UniversityJinhua 321004China

SiOxNy fil.s with different oxygen concentrations were fabricated by reactive magnetron sputtering,and the resistive switching characteristics and conduction mechanism of Cu/SiOxNy/ITO devices were *** Cu/SiOxNy/ITO device with SiOxNy deposited in 0.8-sccm O2 fl.w shows a rel.abl. resistive switching behavior,incl.ding good endurance and retention *** the conductivity of SiOxNy increases with the increase of the oxygen content dynamical.el.ctron trapping and detrapping is suggested to be the conduction *** temperature dependent I-V measurement indicates that the carrier transport can be ascribed to the hopping conduction rather than the metal.ic conductive fil.ment.

关键词： sil.con oxynitride resistive random access memory oxygen concentration