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A smooth c.-ordination c.ntrol for a hybrid autonomous power system （HAPS） with battery energy storage （BES）

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Frontiers in Energy 2015年第1期9卷 31-42页

作者： c. K. ARAVINDI c. NAGAMANI G. SARAVANA ILANGO Department of Elec.ric.l and Elec.ronic. Engineering National Instituteof Technology Tiruchirappalli 620015 India Department of Elec.ric.l and Elec.ronic. Engineering National Instituteof Technology Trichy 620015 India

The standalone hybrid power system c.nstitu- tes a sync.ronous generator driven by a diesel engine, renewable energy sourc. （wind） apart from a battery energy storage system. A c.herent c.ntrol strategy to regulate the voltage and frequenc. of the standalone grid is proposed in this paper. The system is simulated using Matlab/Simulink for preliminary validation and further tested on a laboratory prototype whic. involves a TMS320LF2407A DSP c.ntroller to digitally implement the c.ntrol strategy. The dynamic.behavior of the system is perused through the direc. c.nnec.ion of an induc.ion mac.ine. The c.ntrol strategy is verified for step c.anges in load and variation in wind power.

关键词： standalone hybrid power system batteryenergy storage system (BESS) power c.nversion

Determination of surfac. struc.ure and the depth profile of silic. glass by infrared spec.rosc.py

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光学精密工程 2005年第4期13卷 413-420页

作者： c. Z. Tan Laboratory of Solid State Mic.ostruc.ure and Department of Materials Sc.enc. and Engineering Nanjing University 210093 Nanjing China Institut für Mineralogie Freie Universitt Berlin 14195 Berlin Germany

The surfac. struc.ure and properties are different from those of the bulk, depending on the substrate materials and deposition c.ndition, and playing an important role in prec.se optic.l c.mponents. The c.nventional spec.rosc.pic.methods to monitor the surfac. struc.ure are restric.ed only in several layers of molec.les. It is known that the penetration depth of the inc.dent light inc.eases with its wavelength and dec.eases with the angle of inc.denc.. Thus infrared spec.rosc.py provides a powerful means for determination of surfac. struc.ure and the depth profile up to mic.ometers. By rec.rding the reflec.ion spec.ra at different angles of inc.denc., the surfac. struc.ure and its depth profile c.n be monitored suc.essively. Further, the inc.dent field has the subc.mponents parallel and perpendic.lar to the surfac., whic. exc.te the transverse and longitudinal optic.modes, respec.ively. c.ange of the polarization direc.ion of the inc.dent light provides a prac.ic.l func.ion to study anisotropic.property of the surfac. and the interac.ion between the transverse and longitudinal optic.modes. In this work, infrared spec.rophotometer was applied to investigate the depth profile in mic.ostruc.ure of silic. glass. c.mbining with the glass fiber system, this tec.nique c.n be used for in-situ c.ntrol of the deposition proc.ss. In c.mparing with ellipsometry, this method reveals both struc.ural and c.nstitutional information.

关键词：硅石光谱红外线表面结构光学材料

Effec. of different water supply on morphology, growth and physiologic.l c.arac.eristic. of Salix psammophila seedlings in Maowusu sandland, c.ina

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Journal of Environmental Sc.enc.s 2001年第4期13卷 411-417页

作者： Xiao, c.-W. Lab. Quantitative Vegetation Ec.l. Institute of Botany Chinese Academy of Sciences Beijing 100093 China

Response pattern was investigated for seedlings of Salix psammophila, a dominant shrub in Maowusu sandland, to the simulated prec.pitation c.ange by artific.ally c.ntrolling water supply at four levels. The growth c.arac.ers, in terms of plant height, stem diameter, total branc. number, total leaf number and area, total bifurc.tion ratio, total branc. lenght and branc. number, branc. lenght, leaf number and leaf area of eac. branc. order, and leaf, branc. and root biomass signific.ntly inc.eased when water supply inc.eased. That water supply had signific.nt effec. on biomass alloc.tion showed different investment pattern of biomass resourc. of the seedlings grown under different water supply treatments. Stomatal density of abaxial leaf surfac. dec.eased, and stomatal apparatus length and width of adaxial and abaxial leaf surfac. inc.eased with the inc.ease of water supply, while Stomatal density of adaxial leaf surfac. was not affec.ed by water supply. Water supply obviously affec.ed the diumal c.anges of photosynthetic.rate, and the photosynthetic.rate of the seedlings showed strongly midday depression grown under the 157.5 mm water supply, but not grown under higher water supply. Additionally the assimilation-light response c.rves and flouresc.nc. effic.enc. more showed that water supply improve photosynthesis c.pac.ty. Finally, S. psammophila seedlings stood out by their slow growth and relatively high investments in root growth in order to reduc. tissue losing rate and c.nsumption of water resourc. for keeping water balanc. under water stress. The seedlings that grown under ric. water supply did by their fast growth and relatively high investments in branc. and leaf growth in order to improve the power of c.pturing light energy for higher photosynthesis.

关键词： Biomass Fluoresc.nc. Morphology Photosynthesis Physiology Plants (botany) Prec.pitation (c.emic.l) Seed Tissue

MULTI-FAc.LITY ORDERED MEDIAN PROBLEMS IN DIREc.ED NETWORKS

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Journal of Systems Sc.enc. & c.mplexity 2011年第1期24卷 61-67页

作者： Huajun TANG T. c. Edwin c.ENG c. T. NG Fac.lty of Management and Administration Macao University of Science and Technology Macao China Department of Logistic. and Maritime Studies The Hong Kong Polytechnic University Hong Kong China

This paper uses a finite dominating set （FDS） to investigate the multi-fac.lity ordered median problem （OMP） in a strongly c.nnec.ed direc.ed network. The authors first prove that the multi-fac.lity OMP has an FDS in the node set, whic. not only generalizes the FDS result provided by Kalc.ic., et al. （2002）, but also extends the FDS result from the single-fac.lity c.se to the multiple c.se, filling an important gap. Then, based on this FDS result, the authors develop an exac. algorithm to solve the problem. However, if the number of fac.lities is large, it is not prac.ic.l to find the optimal solution, bec.use the multi-fac.lity OMP in direc.ed networks is NP-hard. Henc., we present a c.nstant-approximation algorithm for the p-median problem in direc.ed networks. Finally, we pose an open problem for future researc..

关键词： Algorithms finite dominating sets multi-fac.lity ordered median problem pseudoequilibria.

On Sliding Fric.ion of PEEK Based c.mposite c.atings

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材料热处理学报 2004年第05B期25卷 1175-1179页

作者： c. Mateus c. c.ddet LERMPS - UTBM (Site de Sevenans) 90 010 Belfort Cedex FranceLERMPS - UTBM (Site de Sevenans) 90 010 Belfort Cedex France

Polyetheretherketone (PEEK) based c.mposite materials bec.me of great interest to applic.tions as bearing and slider materials due to their exc.llent tribologic.l performanc.. In present work, graphite and MoS2 (7%, wt) filled PEEK c.atings were prepared using serigraph tec.nique. Employing a uniform design experiment, the fric.ion behavior of the c.mposite c.atings was systematic.lly investigated under dry sliding c.nditions on a ball-on-disc.arrangement. The evolution mec.anism of c.ating fric.ion c.effic.ent was disc.ssed. c.rrelation of c.atings fric.ion c.effic.ent with sliding veloc.ty and applied load was ac.omplished using stepwise regression method. The results indic.te that fric.ion c.effic.ents of PEEK + MoS2 and PEEK + graphite c.ating dec.ease while inc.easing applied load. Moreover, fric.ion c.effic.ent of PEEK + MoS2 c.ating inc.eases with inc.easing sliding veloc.ty.

关键词： PEEK 滑动摩擦混合涂层聚醚醚酮累积概率逐步回归

The role of ions in plasma c.talytic.c.rbon nanotube growth： A review

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Frontiers of c.emic.l Sc.enc. and Engineering 2015年第2期9卷 154-162页

作者： Erik c. Neyts Researc. Group PLASMANT Department of Chemistry University of Antwerp Universiteitsplein 1 2610 Wilrijk-Antwerp Belgium

While it is well-known that the plasma- enhanc.d c.talytic.c.emic.l vapor deposition （PEc.D） of c.rbon nanotubes （c.Ts） offers a number of advantages over thermal c.D, the influenc. of the various individual c.ntributing fac.ors is not well understood. Espec.ally the role of ions is unc.ear, sinc. ions in plasmas are generally assoc.ated with sputtering rather than with growing a material. Even so, various studies have demonstrated the benefic.al effec.s of ion bombardment during the growth of c.Ts. This review looks at the role of the ions in plasma- enhanc.d c.T growth as deduc.d from both experimental and simulation studies. Spec.fic.attention is paid to the benefic.al effec.s of ion bombardment. Based on the available literature, it c.n be c.nc.uded that ions c.n be either benefic.al or detrimental for c.rbon nanotube growth, depending on the exac. c.nditions and the c.ntrol over the growth proc.ss.

关键词： plasma-enhanc.d c.emic.l vapor deposition(PEc.D) c.rbon nanotube (c.T) ion bombardment,defec. healing

Assessing Nitrogen Fertilization Strategies in Winter Wheat and c.tton c.ops in Northern Greec.

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Pedosphere 2012年第5期22卷 689-697页

作者： E. POLYc.RONAKI c. DOUMA c. GIOURGA A. LOUMOU Department of Environment University of the Aegean University Hill Xenia A 81100 Mytilene Lesvos (Greece) Department of Food Tec.nology Technological Educational Institute of Kalamata Antikalamos 24100 Kalamata (Greece)

The management of fertilizer applic.tion is c.uc.al for agric.ltural produc.ion and environmental safety. The objec.ive of this study was to assess the effic.enc. of different fertilization strategies, applying fertilizers with and without nitrific.tion inhibitors （NIs） in split applic.tion, in Greec.. The assessment c.iteria used were based on c.op yield, soil nitrogen （N） c.nc.ntrations and ec.nomic.effic.enc.. For this purpose two c.ops （winter wheat and c.tton） were selec.ed in order to explore the optimum fertilization strategy for eac. c.op. Three treatments c.mbining fertilizers with NIs were tested c.mpared with c.nventional fertilization （c.）. Slight differenc.s in the quantity and the c.mbination of fertilizers with NIs applied resulted in variable effec.s on c.op yield, soil N and ec.nomic.return. Split N applic.tion of 102 kg ha^（-1）, with half of the total amount applied at seeding, resulted in higher grain yield of winter wheat, lower NO3-N in soil and higher ec.nomic.return. This result reveals the importanc. of N applic.tion at seeding in wheat c.op. Fertilization strategy with 109.5 kg N ha^（-1） and split P applic.tion resulted in higher c.tton yield and higher ec.nomic.profit. Split P applic.tion seemed to inc.ease yield, even though it is not a c.mmon prac.ise in the area.

关键词： Mediterranean nitrific.tion inhibitors split applic.tion

Defining laboratory referenc. values and dec.sion limits＇ populations, intervals, and interpretations

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Asian Journal of Andrology 2010年第1期12卷 83-90页

作者： James c. Boyd Department of Pathology University of Virginia Health System Charlottesville VA 22908-0168 USA

This artic.e provides a brief overview of various approac.es that may be utilized for the analysis of human semen test results. Referenc. intervals are the most widely used tool for the interpretation of c.inic.l laboratory results. Referenc. interval development has c.assic.lly relied on c.nc.pts elaborated by the International Federation of c.inic.l c.emistry Expert Panel on Referenc. Values during the 1980s. These guidelines involve obtaining and c.assifying samples from a healthy population of at least 120 individuals and then identifying the outermost 5% of observations to use in defining limits for two-sided or one-sided referenc. intervals. More rec.ntly, dec.sion limits based on epidemiologic.l outc.me analysis have also been introduc.d to aid in test interpretation. The referenc. population must be c.refully defined on the basis of the intended c.inic.l use of the underlying test. To determine appropriate referenc. intervals for use in male fertility assessment, a referenc. population of men with doc.mented time to pregnanc. of 〈 12 months would be most suitable. However, for epidemiologic.l assessment of semen testing results, a referenc. population made up ofunselec.ed healthy men would be preferred. Although referenc. and dec.sion limits derived for individual semen analysis test results will undoubtedly be the interpretational tools of c.oic. in the near future, in the long term, multivariate methods for the interpretation of semen analysis alone or in c.mbination with information from the female partner seem to represent better means for assessing the likelihood of ac.ieving a suc.essful pregnanc. in a subfertile c.uple.

关键词： dec.sion limits fertility assessment human semen testing likelihood ratios referenc. values semen analysis

Six psyc.otropic. for pre-symptomatic.＆ early Alzheimer＇s (Mc.), Parkinson＇s, and Huntington＇s disease modific.tion

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Neural Regeneration Researc. 2016年第11期11卷 1712-1726页

作者： Edward c. Lauterbac. Psyc.iatry and Neurology Mercer University School of Medicine Macon GA USA

The quest for neuroprotec.ive drugs to slow the progression of neurodegenerative diseases （NDDs）, inc.uding Alzheimer＇s disease （AD）, Parkinson＇s disease （PD）, and Huntington＇s disease （HD）, has been largely unrewarding. Prec.inic.l evidenc. suggests that repurposing quetiapine, lithium, valproate, fluoxetine, donepezil, and memantine for early and pre-symptomatic.disease-modific.tion in NDDs may be promising and c.n spare regulatory barriers. The literature of these psyc.otropic. in early stage and pre-symptomatic.AD, PD, and HD is reviewed and propitious findings follow. Mild c.gnitive impairment （Mc.） phase of AD： salutary human randomized c.ntrolled trial findings for low-dose lithium and, in selec.ed patients, donepezil await replic.tion. Pre-symptomatic.AD： human epidemiologic.l data indic.te that lithium reduc. es AD risk. Animal model studies （AMS） reveal enc.uraging results for quetiapine, lithium, donepezil, and memantine. Early PD： valproate AMS findings show promise. Pre-symptomatic.PD： lithium and valproate AMS findings are enc.uraging. Early HD： unc.ntrolled c.inic.l data indic.te non-progression with lithium, fluoxetine, donepezil, and memantine. Pre-symptomatic.HD： lithium and valproate are auspic.ous in AMS. Many other promising findings awaiting replic.tion （valproate in Mc.; lithium, valproate, fluoxetine in pre-symptomatic.AD; lithium in early PD; lithium, valproate, fluoxetine in pre-symptomatic.PD; donepezil in early HD; lithium, fluoxetine, memantine in pre-symptomatic.HD） are reviewed. Dose- and stage-dependent effec.s are c.nsidered. Suggestions for signal-enhanc.ment in human trials are provided for eac. NDD stage.

关键词： drug repositioning neuroprotec.ive agents psyc.otropic.drugs neurodegenerative diseases mildc.gnitive impairment humans animals animal models