简介：Westudypreconditioningtechniquesusedinconjunctionwiththeconjugategradientmethodforsolvingmulti-length-scalesymmetricpositivedefinitelinearsystemsoriginatingfromthequantumMonteCarlosimulationofelectroninteractionofcorrelatedmaterials.Existingpreconditioningtechniquesarenotdesignedtobeadaptivetovaryingnumericalpropertiesofthemulti-length-scalesystems.Inthispaper,weproposeahybridincompleteCholesky(HIC)preconditioneranddemonstrateitsadaptivitytothemulti-length-scalesystems.Inaddition,weproposeanextensionofthecompressedsparsecolumnwithrowaccess(CSCR)sparsematrixstorageformattoefficientlyaccommodatethedataaccesspatterntocomputetheHICpreconditioner.Weshowthatformoderatelycorrelatedmaterials,theHICpreconditionerachievestheoptimallinearscalingofthesimulation.Thedevelopmentofalinear-scalingpreconditionerforstronglycorrelatedmaterialsremainsanopentopic.

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简介：最近，大努力在任意的弄歪的设备的制造被作了满足便携、小的电子产品的要求。当它是一个很挑战性的工作时，灵活底层上的高水晶的优秀电影的直接生长是最理想的方法与当前的半导体设备由于简单、兼容的准备技术的优点制作灵活设备，并且通常非结晶、多晶或不连续的单个水晶的电影被完成。这里，我们表明高质量的双性人2Te3单身者由修改的热墙取向附生技术的灵活polyimide底层上的水晶的电影。试验性的结果表明邻近的雏晶协调地被联合形成一部连续电影，尽管迷惑的雏晶的数量由于快生长率被产生。由把一个石英过滤器插入到生长试管，迷惑的雏晶的数字密度有效地由于改进螺线相互作用被减少。而且，灵活双性人2Te3光电导体被制作并且在弯曲的不同的度下面展出强壮的在红外线附近的光导的反应，它也证实对电子应用合适的获得的灵活电影。

简介：Thestrategyofsequentiallyspin-coatingaperovskitefilmfromtheperovskiteprecursorandanelectrontransportinglayerof[6,6]-phenyl-C71-butyricacidmethylester(PC71BM)isdevelopedtosimplifythefabricationprocedureofperovskitesolarcells.X-raydiffractionandscanningelectronmicroscopyindicatethatPC71BMfilmonperovskitelayercanretardtheevaporationofdimethylsulfoxide（DMSO）efficiently,thusprolongingthetransformationofintermediatephasetoperovskitecrystals,leadingtoahighqualityperovskitethinfilm.Thesolarcellswiththestructureofindiumtinoxides（ITO）/poly（3,4-ethylenedioxythiophene）:poly（styrenesulfonate）（PEDOT:PSS）/CH3NH3PbI3/PC71BM/bathocuproine（BCP）/Agmadefromthissimplifiedmethodexhibitahigherefficiency（12.68%）thanthosefromtheconventionalone-stepmethod（9.49%）.

简介：A100-J-levelNd:glasslasersysteminnanosecond-scalepulsewidthhasbeenconstructedtoperformasastandardsourceofhigh-fluence-laserscienceexperiments.Thelasersystem,operatingwithtypicalpulsedurationsof3–5nsandbeamdiameter60mm,employsasequenceofsuccessiverodamplifierstoachieve100-J-levelenergyat1053nmat3ns.Thefrequencyconversioncanprovideenergyof50-Jlevelat351nm.Inadditiontothehighstabilityoftheenergyoutput,themostvaluableofthelasersystemisthehighspatiotemporalbeamqualityoftheoutput,whichcontainstheuniformsquarepulsewaveform,theuniformflat-topspatialfluencedistributionandtheuniformflat-topwavefront.

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简介：Fractionalpyrolysisandone-steppyrolysisofnaturalalgaeCyanobacteriafromTaihuLakewerecomparativelystudiedfrom200to500°C.One-steppyrolysisproducedbio-oilwithcomplexcompositionandlowhighheatingvalue(HHV30.9MJ/kg).FractionalpyrolysisseparatedthedegradationofdifferentcomponentsinCyanobacteriaandimprovedtheselectivitytoproductsinbio-oil.Thatis,acidsat200°C,amidesandacidsat300°C,phenolsandnitrilesat400°C,andphenolsat500°C,weregotasmainproducts,respectively.HZSM-5couldpromotethedehydration,crackingandaromatizationofpyrolyticintermediatesinfractionalpyrolysis.AtoptimalHZSM-5catalystdosageof1.0g,theselectivitytoproductsandthequalityofbio-oilwereimprovedobviously.Themainproductsinbio-oilchangedtonitriles(47.2%)at300°C,indoles(51.3%)andphenols(36.3%)at400°C.Theoxygencontentwasreducedto7.2wt%and9.4wt%,andtheHHVwasraisedto38.1and37.3MJ/kgat300and400°C,respectively.Fractionalcatalyticpyrolysiswasproposedtobeanefficientmethodnotonlytoprovideapotentialsolutionforalleviatingenvironmentalpressurefromwaterblooms,butalsotoimprovetheselectivitytoproductsandobtainhighqualitybio-oil.

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简介：Wereportontheperformanceofacontinuous-waveNd:GdVO4laserin-banddiode-pumpedat912nmwithhighoutputpowerandexcellentbeamquality.Thelaserproducedanoutputpowerof19.8Wat1063nmwithanopticalefficiencyof59.3%andslopeefficiencyof62.7%.Thelaserthresholdwas2.04Woftheabsorbedpumppower,andthelaseroutputbeamqualitywas≤1.2inthehorizontalandverticaldirections.Thestrengthofthermallensingatfulloutputpower（33.4Wofabsorbedpower）wasmeasuredtobeanaverageof8.6diopters.Itisshownthatthermallensingisreducedbyafactorof2withrespecttotheNd:YVO4lasers,thusopeningawayforfurtheroutput-powerscaling.

简介：Wehavesuccessfullydemonstratedthathighqualityandhighdielectricconstantlayerscanbefabricatedbylowtemperaturephoto-inducedor-assistedprocessing.Ta2O5andZrO2havebeendepositedatt＜400℃bymeansofaUVphoto-CVDtechniqueandHfO2byphoto-assistedsol-gelprocessingwiththeaidofexcimerlamps.TheUVannealingofas-grownlayerswasfoundtosignificantlyimprovetheirelectricalproperties.Lowleakagecurrentdensitiesontheorderof10-8A/cm2at1MV/cmfordepositedultrathinTa2O5filmsandca.10-6A/cm2forthephoto-CVDZrO2layersandphoto-irradiatedsol-gelHfO2layershavebeenreadilyachieved.TheimprovementintheleakagepropertiesoftheselayersisattributedtotheUV-generatedactiveoxygenspeciesO(1D)whichstronglyoxidizeanysuboxidestoformmorestoichiometricoxidesonremovingcertaindefects,oxygenvacanciesandimpuritiespresentintheas-preparedlayers.Thephoto-CVDTa2O5filmsdepositedacross10.16-cmSiwafersexhibitahighthicknessuniformitywithavariationoflessthan±2.0%beingobtainedforultrathinca.10nmthickfilms.Thelamptechnologycaninprinciplebeextendedtolargerareawafers,providingapromisinglowtemperatureroutetothefabricationofarangeofhighqualitythinfilmsforfutureULSItechnology.

简介：摘要当前，基于我国社会经济迅猛发展的时代背景下，我国电力企业为了充分的适应时代发展的需求，并在市场竞争中保持稳定的地位，开始将优质服务引入到市场营销工作中，经过一段时间的发展与实践，取得了良好的成效。因此，本文基于电力市场营销策略及优质服务展开详细的探究，以此提出一些见解，以供参考。

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简介：摘要新一轮电改实施对供电企业的管理水平和服务能力提出了更新更高的要求。为企业不断适应电改形势，有效应对客观挑战做出积极有益的探索。本文从提高供电服务质量入手，细致研究了优质服务评价体系，分析短板、查找不足，达到提升管理水平和服务能力，夯实电网企业管理基础的工作目标。

简介：摘要随着新课改的推进，中学地理课堂的教学理念，教学方式，教学目标等方面都进行了深刻的改革，本文通过新课标下的地理课堂的研究背景，中学生的心理特点，了解中学地理优质课堂的特点。以社会所需求为目标，培养高素质人才的前提条件出发，全方位分析地理课堂现今状况以及影响因素，从而得出基于新课标下的优秀中学地理课堂的教学策略。

简介：目前大多数高三数学教师仍然把知识技能作为数学教学的主要目标，教学活动目标单一，拼时间、拼消耗，缺乏对目标全方位的认识和掌控，忽视了诸如思维能力的发展、数学兴趣的培养等其他方面的目标；如何突破教学瓶颈，做到事半功倍？笔者在多年的高三数学课堂教学中，尝试着引导学生体验课堂，形成动态课堂，收到了很好的教学效果．