简介：AcancelingrangesidelobesschemehasbeensuggestedbyYangGuangzheng,etal.,(1997)thistechnologyisbasedonthefactthatallsidelobeofgroupcorrelationfunctionofidealsetsarezero.Atfirst,thispapergivesthebestidealsets(i.e.thebestbiphasecodesetswhosemaximalsidelobenotmorethan2)forallcodelengthN≤12,whichhavebeenobtainedfrombinarysequencesbymeansofthebestcodessievingmethodsuggestedbyYangGuangzheng,etal.(1997)ComputersimulationforgroupcorrelationpropertyofbestidealsetsforcodelengthN=12onvariousconditionsismade.Simulationresultshowsthatthesidelobelevelofbestidealsetwithnoweightingiszero,underconditionofzero-Dopplershiftandhasultra-lowsidelobeonDopplerupto5kHzwithnoweightingandwhosetoleranceofphaseandamplitudedistortionisbiggertoo.

简介：Waveguidesuperlattices,aspecialtypeofwaveguidearrays,canbedesignedtoachieveverylowcrosstalkatsubmicrometer/subwavelengthpitches.Thetheoreticalframeworkanddesignrationalesforsuchwaveguidesuperlatticeswillbepresentedindepth.Waveguidesidewallroughnesscanhelptodeterthecoherentcouplingbetweenidenticalwaveguidesinnearbysupercells,butitalsoinducesrandomfluctuationoftransmission.Statisticalbehaviorofthetransmissionduetoroughnessinawaveguidesuperlatticeissystematicallytreated.Complextransmissioncharacteristicsduetospectraloscillationandrandomroughnesswillbepresented,andtheirevolutionwiththesuperlatticelengthwillbeanalyzed.

简介：低温度的吸附为弄干的生物材料弄干和它的申请的优点的工作原则在这份报纸被介绍。由把新鲜生姜用作弄干的材料，它的弄干的特征上的温度和相对湿度的效果被检验。结果证明弄干的率增加，温度或减少的湿度增加。平衡的弄干的时间是几乎，在不同湿度下面的一样调节，但是低平衡潮湿内容能在低湿度下面被获得。新鲜生姜的收缩特征也被学习。它的表面外观的变化被新控告的联合设备(电荷耦合器件)和环境扫描电子显微镜学(ESEM)在弄干的过程期间描绘技术。弄干动力学的一个数学模型根据实验被建立。弄干的关键词低温度的吸附-生姜-弄干特征-收缩特征-数学模型CLC数字TK173

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简介：红移动的圆锥形的排放(CE)被femtosecond激光脉搏在低输入力量在BK7宣传观察(与为蓝移动的CE的产生的那些输入力量相比)。同时地由中央白点尺寸的augment与而红移动的CE戒指(在我们的实验的902nm)消失，蓝移动的CE开始出现的增加的输入力量伴随了。在我们的实验红移动的CE消失被解释以便轴的紧张的增加比戒指排放和有增加的输入激光力量的中央白点尺寸的augment的高得多。[从作者抽象]

简介：Thepreparationofchemicalmanganesedioxide(CMD)fromlow-graderhodochrositeore(LGRO)inXiushan,Chongqing,wasstudiedandimproved,includingleachingwithsulfuricacid,purifying,crystallizinganddecomposingofMnCO3,andrefiningofprimaryMnO2.TheproductwascharacterizedbyX-raydiffraction.Theresultsshowedthattheextractionratio,themanganeserecoveryratioofpurifying,crystallizationandrefiningreached96.8%,93.9%,97.7%and85.4%,respectively.Theoptimumconditionsofrefiningweredescribedasfollows:liquid(H2SO4)/solid(primaryMnO2)ratiowas3L/g,theconcentrationsofNaClOexceeded20%,andreactiontimewas3hours.Undertheaboveconditions,thecontentsofMnO2andMnintheobtainedmanganesedioxidewererespectively85.1%and53.9%.TherefinedMnO2canbeusedasthesupergrademanganesedioxideminepowderinchemicalindustry.TheXRDindicatedthatthestructureoftheproductwasγ-MnO2.

简介：Thispaperdescribestheeffectsofnon-equilibriumairplasmageneratedbyadielectricbarrierdischarge（DBD）onthecombustionoflowheatingvaluefuels.TheexperimentalresultsindicatethatadditionofaverysmallamountofenergytotheairflowintheformofDBDsignificantlyimprovestheflamestability.Moreover,maincombustioncharacteristicssuchasflamepropagationspeed,combustionintensityandleanblow-offlimitsarealsoenhancedbytheeffectofplasma.SomeactiveradicalssuchasexcitedOatomandexcitedN2moleculeareobservedbyspectrographinthedischargearea.BasedontheresultsofnumericalinvestigationwecanconcludethattheseactiveradicalsgeneratedindischargeareacanacceleratetheproductionrateofactiveOHradicalwhichplaysakeyroleintheoxidationprocessoflowheatingvaluefuel,andthusthewholecombustionprocessisaccelerated.

简介：Titaniumandtitaniumalloyshaveseveraladvantages,butthecostoftitaniumalloysisveryexpensivecomparedwiththetraditionalmetalmaterials.Thisarticleintroducestwonewlow-costtitaniumalloysTi-2.1Cr-1.3Fe(TCFalloy)andTi-3Al-2.1Cr-1.3Fe(TACFalloy).Inthisstudy,weusedCr-Femasteralloyasoneoftherawmaterialstodevelopthetwonewalloys.Weintroducethemicrostructureandtensilepropertiesofthetwonewalloysfromβsolutiontreatedwithdifferentcoolingmethods.Optica...

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简介：Thispapercarriesoutthedensityfunctionaltheorycalculationstostudytheadsorbate-substrateinteractionbetweentetraceneandCusubstrates(Cu(110)andCu(100)surface).Oneachofthesurfaces,twokindsofgeometryarecalculated,namely'flat-lying'modeand'uprightstanding'mode.For'flat-lying'geometry,themoleculeisfoundtobealignedwithitslongermolecularaxisalongclose-packeddirectionofthesubstratesurfaces.For'uprightstanding'geometry,thelongaxisoftetraceneisfoundtobeparalleltothesurfacenormalofthesubstrateonCu(110)surface.However,tetraceneappearsas'tilted'modeonCu(100)surface.Structureswith'flat-lying'modehavemuchlargeradsorptionenergyandchargetransferuponadsorptionthanthatwith'uprightstanding'mode,indicatingthepreferenceof'flat-lying'geometryonbothCu(110)andCu(100)surface.

简介：Thereareabout1.27millionhaofuplandredsoilsderivedfromQuaternaryredclayfacingthedegradationinthelow-hillyregionofthemiddlesubtropicalChina.Fromtheaspectsofchemistry,physicsandmicrobiology,theprocessesofsoilfertilityrestorationinthesurfacelayer(0-20cm)underthreetypesoflandusepatterns(i.e.citursorchard,teagardenandupland)intwoprovinceswerestudiedinthiswork.Resultsshowedthatthereclamationoferodedwastealdnimprovedmostofsoilproperties.Soilorganicmatter,totalNandP,availablePandK,andexchangeableCaandMgincreased,butsoiltotalKandexchangeableAldecreasedSoilpHdecreasedby0.5unitinthepureteaplantationfor20years.Soilreclamationincreasedthepercentageofsoilmicreasedby0.5unitinthepureteaplantationfor20years.Soilreclamationincreasedthepercentageofsoilmicroaggregates(<0.25mm),especiallythosewithadiameterof0.02-0.002mm.Soiltotalporosityincreasedinthecultivatedlandswiththeincreaseofsoilaerationandcapillaryporosity,Thenumberofsoilmicroorganismsincreasedwithreclamationcausedmainlybythehugeincreaseofthetotalamoutofbacteria,Withthecultivation,theeativityofsoilureaseandacidphosphataseincreased.butthatofinvertasedropped.

简介：在毫米波浪(mmWave)巨大多重输入多重产量(MIMO)系统因为高硬件费用和高电源消费，传统的充分数字的beamforming(DBF)不能容易被实现。同时，与阶段shifters被实现的模拟beamforming有高可获得性，但是承受差的性能。认为上面的优点是二，在可得到的反复的优化算法能近得到性能到充分数字的处理的地方，一个潜在的答案是设计适当混合类似物和数字beamforming结构，但是解决这个稀少的优化问题面对高计算的复杂性。搜寻混合beamforming(HBF)的关键挑战在利用交易在之间的矩阵谎言光谱效率性能和计算复杂性。在这份报纸，我们基于天线数组反应(AAR)建议一个asymptotically单一的混合precoding(AUHP)算法解决HBF优化问题的性质。第一，我们让最佳的直角的模拟、数字的beamforming矩阵由考虑在绝对值依靠隧道路径获得AAR矩阵是asymptotically单一的。然后，一基于递归改进了同时直角的匹配的追求(SOMP)算法被采用精制混合联合。数字结果证明我们的建议AUHP算法启用更低的计算复杂性与可以忽略光谱效率表演降级。

简介：Alow-diffusionpreconditioningRoeschemewithanadjustableparametertocontrolthenumericaldissipationisproposed.Thisschemereflectstherealphysicaldissipationintheextremelylow-speedregion.Thepreconditioningparameterinschemeisimprovedbylinearcut-offandcorrectionfactor.Thenumericalresultsoflow-Mach-number/low-Reynolds-numbersteadysolutionsofviscousflowspastacircularcylinderandpastaNACA0012airfoilshowtheefficiencyofthenewscheme.

简介：ThecorrosionbehaviorofaweatheringsteelSPA-Candtwoacidresistancesteels(S-TEN1andND)insulfuricacidsolutionwasinvestigatedbyusingpotentiodynamicpolarizationandweightlossmeasurementtechniques.Bothpotentiodynamicpolarizationandweightlossmeasurementtestsindicatedthatcorrosionresistanceofthesethreealloysteelswasasfollows:ND≈S-TEN1>SPA-C.Surfaceanalysisofthecorrodedsamplesconductedaftertheimmersiontestindicatedthattwolayerswereformedonthesubstrates,withtheouterlayercomprisingFeSO_4·H_2Oandtheinnerlayermainlycomprisingironoxides.TheadditionofCu,Cr,andSbrefinedthecorrosionproductsandimprovedtheadhesionabilitybetweentherustlayerandthesubstrate.

简介：Sincereformandopeningupandinrecentyearsinparticular,China'soverallnationalstrengthhasbeengrowingnoticeably.ThespeedofChina'sdevelopmenthasattractedworldwideattention.Itsaggregatenationalstrengthisalreadyamongthetopfewintheworldwithamomentumofcontinuousgrowing.In

简介：Experimentsonsonictransmissionshowthataslabstonecandirectlytransmitpartoftheenergyofawaveexcitedbyknockingorbyatransducerintotheair.Theotherpartofthewaveenergycangeneratethenormalmodeofvibrationontheslabstoneandexcitemeasurableacousticsignalsintheair.Thedominantfrequencyisrelatedtothesizeoftheslabstone.Theseresultsindicatethattheacousticemission(AE)inrockalsodisplayssimilarbehaviorifthesourceisshallow.Itisdemonstratedthatwiththenucleationandpropagationofcracks,thedominantfrequencyoftheradiatedwavewillbelower.Whenthefrequencybecomesverylow,thewavecanbetransmittedthroughtherockintotheairandbereceivedbyamicrophone.Accordingtothetheoryofsimilarityofsize,therewillbelow-frequencywavesbeforestrongearthquakesbecauseofnucleationofcracks,whichcanbereceivedbyspeciallow-frequencytransducersorinfrasonicdetectors.Beforeearthquakes,themechanismofprecursorscouldbeverycomplicated.Theymightbeproducedbyplasticcreeporattributedtoliquidsbutnotbrittlefractureinmostcases.Sotheperiodsoftheproducedwaveswillbelonger.Thisperhapsaccountsforthelackofforeshocksbeforemanystrongearthquakes.

简介：Chinaachievedmajorprogressinlow-carbondevelopmentduringtheperiodofthe11thFiveYearPlan(2006-2010).Theincreasingtrendofenergyintensityandcarbonintensityoftheeconomyasseenpriorto2005wasreversedtoasharpdecreasingtrend,leadingtoa19%decreaseinenergyintensityand21%decreaseincarbonintensityinfiveyears.Theenhancedenergyefficiency,mostlyduetoefficiencyimprovementinpowerandmanufacturingsector,isthemajordriverofthedecreaseincarbonintensityoftheeconomy.Thedevelopmentofrenewableenergy,despiteitsimpressivegrowthrate,playedaminorrolebecauseofitssmallshareintheenergymixofthecountry.Energycon-sumptionandenergy-relatedcarbonemissionsperunitofareainbuildingcontinuedtogrowatalesserrate,which,combinedwiththefastgrowthoftotalbuildingvolume,ledtofastgrowthintotalenergyconsumptionandcarbonemissionsinthesector.Similartrendisobservedinthetransportationsectorwhosetotalenergyuseandcarbonemissionscontinuedtogrowfastdespiteslightimprovementinenergyefficiency.Agriculturalenergyuseexperiencedaslightchangeandforestrymadeamajorcontributiontocarbonsinks.Policyandinstitutionalinnovationshelpedbuildasolidsystemofrulesforlow-carbondevelopment.Improvingcosteffectivenessofthesystemremainsamajorchallengeforthenextfiveyearplanperiod.

简介：Inrespondingtoglobalclimatechange,theideaoflow-carboneconomyemergesasthetimesrequire.Developinglow-carboneconomyisbasedontheconstructionoflow-carbonsociety.Thesocalled'two-orientationsociety'(resourcesconservationorientatedsocietyandenvironmentalfriendlyorientatedsociety)istheconcreterepresentationoflow-carbonsocietywithChinesecharacteristics,andanactualactionforChinaindevelopinglow-carboneconomy.Basedonurbanagglomeration,thepaperdiscussesthemeaningofandtheroutetolow-carbonsocietywhichwouldbetterreflecttheintrinsicrequirementsofsuchasociety.

简介：TheBritishgovernmentinitiatedtheconceptoflow-carboneconomyinits2003WhitePaperonenergy,whichconstitutedaneconomicmodelforhighereconomicoutputwithlownaturalresourceconsumptionandlowenvironmentalpollution.Since