简介：Inthestudyofnuclearfusion,theconventionalfuellingofplasmaisedgegaspuffing,howevermanyexperimentsindicatedthatthefuellingefficiencyofgaspuffingusuallydegradedwithincreaseofheatpowerleadingthedensityprofileofplasmacontrol

简介：TheextendedRiccatimappingapproachisfurtherimprovedbygeneralizedRiccatiequation,andcombineitwithvariableseparationmethod,abundantnewexactcomplexsolutionsforthe(2+1)-dimensionalmodifieddispersivewater-wave(MDWW)systemareobtained.Basedonaderivedperiodicsolitarywavesolutionandarationalsolution,westudyatypeofphenomenonofcomplexwave.

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简介：采用溶胶-凝胶法制备纳米级SiO2粉，分别用X射线衍射仪、透射电子显微镜、红外光谱仪和差热扫描量热分析仪对其进行了分析测试。结果表明于凝胶在1200℃热处理1小时仍是无定型的SiO2粉，其平均粒度大小为40nm。

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简介：在这份报纸，为在管的超声的内部流动的调查的马赫4超声的风隧道的轮廓第一被描述。第二，2和马赫4伪吃惊在方形的管挥动的马赫的地点，结构和特征被颜色schlieren相片和管墙压力调查变化大小。最后，墙砍有马赫4伪吃惊的方形的管的墙挥动的方面，顶和底部上的压力分布是由shear的调查品质上压力敏感的液体水晶可视化方法。在第一震动下面的方面墙边界层分离区域在最高的墙附近是狭窄的，当在第一震动下面的方面墙边界层分离区域在底部墙附近是很宽的时。关键词超声的内部流动-伪吃惊波浪-流动可视化-砍压力敏感的液体水晶CLC数字O357.4+2

简介：用纳米结构粉末做喂料进行喷涂，缩短了颗粒熔化时间，在有限的飞行时间内，颗粒熔化效果更好，从而制备的涂层孔隙率更小，表面更平整。用ZrO2纳米结构喂料制备了等离子喷涂层，研究了功率、粒度、氧化钇含量等工艺参数条件下涂层的微观组织、孔隙率、相组成及抗热震性能。经X衍射分析表明，原始粉末由m-ZrO2,t-ZrO2,c-ZrO2构成，单斜相的含量为11％，主要由四方相和立方相构成。

简介：AnefficientprocessfortheconversionofdimethyloxalateintoethyleneglycolwithhighselectivityandhighyieldoverCu2Owasinvestigated.InsituformedCuasatruecatalyticallyactivespeciesshowedagoodcatalyticperformanceforDMOconversiontoproduceEGin95%yield.

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简介：Atacertainhightemperature,thiscyclewillbedominantandendtherp-processtoheavierregion[2].Itprovidesanuppertemperaturelimitforrp-processalongtheprotondriplinetoproducenuclidesbeyondA=84,includingthelightpnuclidesof92;94Mo,96;94Ru.TheexistenceofZr-Nbcycleisanimportantquestioninrp-process[2].α-separationenergy(Sα)of84Moplaysanimportantroleintheformationofthiscycle.Astrongenhancementof83Nb(p,α)reactionrateisduetoaverylowSαof84Mo[1].

简介：新课改伊始。老师们在聆听了专家们从理念高度将“教学应当如何”讲得洋洋洒洒的报告后热血澎湃，而回到学校开展教学和看着学生完成的一份份试卷时，马上心灰意冷——专家们说得太对了，可是咱们要应付考试……考试怎么了？难道考试妨碍了教学，妨碍了课改？是的，课改不只是改“课”，也要改“考”．对于一线教学而言。“课”与“考”是联系最为紧密的两个方而．

简介：PhotocatalyticH2productionhasemergedasoneofthemostcleanandpromisingrenewableenergysources.InspiteoftheeffortstoobtainefficientphotocatalystsabletoproduceH2fromSunlightandwater,thereisstilltheneedtopreparecheaperandenvironmentalfriendlierphotocatalysts.Phosphatebasedmaterialscouldbegoodcandidatestofulfilltheserequirements.InthismanuscriptwehavepreparedasetofmixedTi3+/Ti4+valence,open-frameworktitaniumphosphates（of-TiPO4）andmixedtitaniumoxide/phosphatederivatives（cr-TiP）,correlatingtheirstructureandcompositionwiththephotocatalyticactivityforH2production.Wedeterminedthatmixedtitaniumoxide/phosphatecrystallinephasesproducedenhancedH2evolutionunderSunsimulatedlightirradiationthanmixedTi3+/Ti4+valence,open-frameworktitaniumphosphatesandtitaniumoxidephases.

简介：Recentadvancesontheuseofnanocarbon-basedelectrodesfortheelectrocatalyticconversionofgaseousstreamsofCO2toliquidfuelsarediscussedinthisperspectivepaper.Anovelgas-phaseelectrocatalyticcell,differentfromthetypicalelectrochemicalsystemsworkinginliquidphase,wasdeveloped.Thereareseveraladvantagestoworkingasphase,e.g.noneedtorecovertheproductsfromaliquidphaseandnoproblemsofCO2solubility,etc.Operatingundertheseconditionsandusingelectrodesbasedonmetalnanoparticlessupportedovercarbonnanotube(CNT)typematerials,longC-chainproducts(inparticularisopropanolunderoptimizedconditions,butalsohydrocarbonsuptoC8-C9)wereobtainedfromthereductionofCO2.Pt-CNTaremorestableandgiveinsomecasesahigherproductivity,butFe-CNT,particularusingN-dopedcarbonnanotubes,giveexcellentpropertiesandarepreferabletonoble-metal-basedelectrocatalystsforthelowercost.ThecontrolofthelocalizationofmetalparticlesattheinneroroutersurfaceofCNTisanimportactfactorfortheproductdistribution.ThenatureofthenanocarbonsubstratealsoplaysarelevantroleinenhancingtheproductivityandtuningtheselectivitytowardslongC-chainproducts.TheelectrodesfortheelectrocatalyticconversionofCO2arepartofaphotoelectrocatalytic(PEC)solarcellconcept,aimedtodevelopknowledgeforthenewgenerationartificialleaf-typesolarcellswhichcanusesunlightandwatertoconvertCO2tofuelsandchemicals.TheCO2reductiontoliquidfuelsbysolarenergyisagoodattempttointroducerenewablesintotheexistingenergyandchemicalinfrastructures,havingahigherenergydensityandeasiertransport/storagethanothercompetingsolutions(i.e.H2).

简介：IntercalationcompoundFePS3(CoCp2)0.40(CoCp2=cobaltocene)wassynthesized,andthecrystalstructureandmagneticpropertieswerestudiedbyx-raydiffraction,magneticsusceptibilitymeasurement,andMSssbauerspectroscopy.Thecrystalstructurewasindexedtomonoclinicunitcellwitha=5.996^。A,b=10.106^。A,c=12.511^。A,β=105.916°,andabout5.6^。Aexpansionatthec-directioncomparedtopureFePS3.TheMSssbauerspectraindicatethattherearethreekindsofdivalentionswithhighspinstateintheintercalationcompound,whichimplieschargetransferfromguesttotheFe-Se^*ganti-bondingorbitsofthehostlattice.Nocationicvacanciesareformedintheintercalationcompound.Theferromagnetismatlowtemperatureoriginatesfromthespincantingofdivalentions.

简介：差分吸收激光雷达的探测机理是被探测气体对激光束能量的吸收。选择两束波长相近的激光，其中一束激光的波长选在被探测组分的吸收峰的中心，使其受到最大的吸收，该波长记为λon，另一束激光的波长选在吸收峰的边缘，使其受到吸收尽可能小，或者不吸收，该波长记为λeff。根据激光雷达方程可以推导出被探测组分随高度或距离的分布，可计算出被探测气体的浓度。

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简介：对称一(2+1)维的浅水波浪系统，最新通过使用分析力学的变化原则被构造，在这篇论文被研究。谎言对称和相应减小借助于古典谎言组途径被获得。(1+1)维的排水量当特殊对称参数被选择时，浅水波浪方程能从减小被导出。

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