简介：让一，b，k，r是有1一b和r的nonnegative整数2。让G是有$n的顺序n的一张图>\tfrac{{(+b)(r(+b)-2)+ak}}{一}$。在这份报纸，我们首先为部分的所有显示出描述(一，b，k)批评的图。然后使用结果，我们证明G都是部分的(一，b，k)批评如果$\delta(G)\geqslant\tfrac{{(r-1)b^2}}{一}+k$并且$|N_G(x_1)\cupN_G(x_2)\cup\cdots\cupN_G(x_r)|\geqslant\tfrac{{bn+ak}}{{+b}}$为任何独立子集{x1，x2，，xr}在G。而且，这被显示出条件$|N_G(x_1)上的更低的界限\cupN_G(x_2)\cup\cdots\cupN_G(x_r)|\geqslant\tfrac{{bn+ak}}{{+b}}$是在某感觉可能的最好，并且它是Lus的延期以前的结果。

简介：赛灵思公司（Xitinx，Inc．）宣布向客户交付由台积公司生产的半导体产业20nmAllProgrammable产品。赛灵思UltraScale器件采用先进的ASIC级可编程架构，以及ASIC增强型Vivado设计套件和近期推出的UltraFast设计方法，可提供媲美ASIC级的性能优势。UltraScale器件能够为客户实现1．5倍到2倍的系统级性能和集成度。

简介：WeshowthatmanyharmonicanalysisoperatorsintheBesselsetting,includingmaximaloperators,Littlewood–Paley–Steintypesquarefunctions,multipliersofLaplaceorLaplace–StieltjestransformtypeandRiesztransformsare,orcanbeviewedas,Calderón–Zygmundoperatorsforallpossiblevaluesoftypeparameterλinthiscontext.Thisextendsresultsexistingintheliterature,butbeingjustifiedonlyforarestrictedrangeofλ.

简介：ThePacificRegionseemstobedeterioratingintoahigh-riskarea.BuildinganoverarchingTrans-PacificSecurityCooperationArchitectureisthecallofthehour.Theaimistofillthevacuumofaregion-wideall-embracingarrangementtocompensateforthedeficienciesofexistingmulti-lateralmechanisms.Fortunately,thePacificOceanoffersamplespacetoaccommodateallplayersintheirpursuitofsharedpeaceandcommondevelopment.

简介：

简介：Ahighpowernarrow-linewidthnanosecondall-fiberlaserbasedonthemasteroscillatorpoweramplifier(MOPA)configurationisdemonstrated.Apulsedseedwithhighrepetitionrateof10MHzwasgeneratedbymodulatingacontinuous-wave(CW)single-frequencyfiberlaserat～1064nmbyusinganelectro-opticintensitymodulator(EOIM).Aftermulti-stagecascadedpoweramplification,theaveragepowerwasboostedtobekilowattlevel.Thepulsesfromthemainamplifierhadapulsewidthof～3nsandanaverage/peakpowerof913W/28.6kW.FurtherpowerscalingofthepulseswaslimitedbystimulatedRamanscattering(SRS)forthemoment,methodforSRSsuppressionandfurtherpowerscalingwasbrieflydiscussed.

简介：Tomakethelarge-scaleheliumcryogenicsystemoffusiondeviceEAST(experimentaladvancedsuper-conductingtokamak)runstably,asthecorepart,theheliumturbineexpandermustmeettherequirementofrefrigerationcapacity.However,previousdesignswerebasedononedimensionflowtodeterminetheaveragefluidparametersandgeometricparametersofimpellercross-sections,sothatitcouldnotdescriberealphysicalprocessesintheinternalflowoftheturbineexpander.Therefore,basedontheinversepropositionofstreamlinecurvaturemethodinthecontextofquasi-three-dimensionalflows,theall-over-controlledvortexconceptwasadoptedtodesigntheimpellerunderspecifiedcondition.Thewrapangleoftheimpellerbladeandthewholeflowdistributiononthemeridianplanewereobtained;meanwhiletheperformanceofthedesignedimpellerwasanalyzed.Thusanewdesignmethodisproposedherefortheinversepropositionoftheheliumturbineexpanderimpeller.

简介：床负担的数量是在沉积运输研究的一个重要物理参数。在床负担测量瞄准困难，这篇论文开发一个装底部的监视器由采用沉积坑方法并且解决象称和desilting的如此的关键问题测量床负担运输率，它能完成长期，平凡的河，河口和海岸的床负担运输率的全天候、即时的telemeasurement。实验室和这个监视器是合理的在的领域测试表演设计，在性质稳定、方便在里面测量，和它能被用来在实际工程监视床负担运输率。

简介：Recently,intenseresearchintolaserplasmaacceleratorshasachievedgreatprogressintheproductionofhigh-energy,high-qualityelectronbeamswithGeV-levelenergiesinacm-scaleplasma.Theseelectronbeamsopenthedoorforbroadapplicationsinfundamental,medical,andindustrialsciences.Herewepresentconceptualdesignsofanextremeultravioletradiationsourcefornext-generationlithographyandalaserComptonGamma-beamsourcefornuclearphysicsresearchonatable-topscale.

简介：Thedevelopment,theunderlyingtechnologyandthecurrentstatusofthefullydiode-pumpedsolid-statelasersystemPOLARISisreviewed.Currently,thePOLARISsystemdelivers4Jenergy,144fslonglaserpulseswithanultra-hightemporalcontrastof5×1012fortheASE,whichisachievedusingaso-calleddoublechirped-pulseamplificationschemeandcross-polarizedwavegenerationpulsecleaning.Bytightlyfocusing,thepeakintensityexceeds3.5×1020Wcm-2.TheseparameterspredestinePOLARISasascientifictoolwellsuitedforsophisticatedexperiments,asexemplifiedbypresentingmeasurementsofacceleratedprotonenergies.Recently,anadditionalamplifierhasbeenaddedtothelaserchain.Intheramp-upphase,pulsesfromthisamplifierarenotyetcompressedandhavenotyetreachedtheanticipatedenergy.Nevertheless,anoutputenergyof16.6Jhasbeenachievedsofar.

简介：ByusingPDM-OFDM-16QAMmodulation,all-Ramanamplification,coherentdetection,and7%forwarderrorcorrection(FEC)threshold,wesuccessfullydemonstrate63-Tb/s(368×183.3-Gb/s)signalover160-kmstandardsinglemodefiber(SSMF)transmissionintheC-andL-bandswith25-GHzchannelspacing.368opticalchannelswithbandwidthspacingof25GHzaregeneratedfrom16externalcavitylasersources.After160-kmSSMFtransmission,alltestedbiterrorrate(BER)areunder3.8×10-3,whichcanberecoveredby7%FECthreshold.Withineachchannel,weachievethespectralefficiencyof6.85bit/s/HzinC/Lband.