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简介：INMay2013,YunnanChihongZincandGermaniumCo.,Ltd.（Chi-hongZn＆Ge）bought51percentofthesharesoftwoBolivianminingcompaniesandundertookamonth-longevaluationofthemines＇localenviron-ments.LaRazonnewspaper,whichhasthebiggestcirculationinBolivia,reportedChihong＇sacquisitionwiththeheadline＂Chinaassessestheenviron-mentalimpactoftheirinvestments,＂claimingthattheminingprojectswerethefirsttopassthetestinBolivia.

简介：Moleculardynamics(MD)simulationsoftheconsecutivecompression-decompressioncyclesofhexagonalzincsulfide(wurtzite)nanoparticlespredictanirreversiblephasetransformationtothecubicpolymorph.Thephasetransformationcommencesatthecontactareabetweentheparticleandtheindenterandproceedswiththenumberofcompressioncycles.Dislocationsarevisibleforaparticlesizeabove5nm.ResultsfromwetgrindinganddrypowdercompressionexperimentsonacommercialwurtzitepigmentagreequalitativelywithMDsimulationpredictions.X-raydiffractionpatternsrevealthattheamountofcubicpolymorphinthecompressedsamplesincreaseswithpressureappliedtothepowder.Incomparisonwithpowdercompression,wetmillingleadstoamorepronouncedphasetransformation.Thisoccursbecausetheparticlesareexposedtoalargenumberofstresseventsbycollisionwiththegrindingmedia,whichleadstotheformationofdefectsandnewsurfacecrystallitesbyparticlefracture.AccordingtotheMDsimulations,phasetransformationisexpectedtooccurpreferentiallyinsurfacecrystallitesbecausetheyexperiencethehighestmechanicalload.Becauseofthephasetransformation,thewetgroundandcompressedsamplesexhibitalowerphotoluminescenceintensitythanthefeedmaterial.Incomparisonwithpowdercompression,millingreducesthephotoluminescenceintensitymoresubstantially.Thisoccursbecauseahigherdefectconcentrationisformed.Thedefectscontributetothephasetransformationandphotoluminescencequenching.

简介：Chineseeconomyisfacingthe'newnormal'stateandisintheperiodofreformandtransformation.UnderthebackgroundofGlobalIndustrie4.0,Chinawillhighlydevelophightechnologyfieldsincludingnewenergy,newmaterials,aerospaceindustry,electronicinformation,biologicaltechnology,energyconservation,environmentalprotection,andsoon.China'srareearthindustryhasexperiencedexportpolicyadjustment,thesixbigrareearthsgroupintegration,priceshittingrock-bottomandsmugglingcrackdownin2015.Withtheissueofnewpoliciesand

简介：Inthepresentpaper,wehaveconsideredtheapproximationofanalyticfunctionsrepresentedbyLaplace-Stieltjestransformationsusingsequenceofdefiniteintegrals.WehavecharacterizedtheirorderandtypeintermsoftherateofdecreaseofEn（F,b）whereEn（F,b）istheerrorinapproximatingofthefunctionF（s）bydefiniteintegralpolynomialsinthehalfplaneRes≤b〈a.

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简介：Thetraditionaleconomicgrowthmodeof"threehighsandonelow(highinput,highconsumption,highpollutionandlowefficiency)"makesChinagettheachievementsofeconomicdevelopmentandprosperityduringthereformandopeningupwithmorethan30years,butbehindthisextensivemodeofeconomicgrowthisexcessiveconsumptionofnaturalresourcesandalotofgreenhousegasesemissions,thisnotonlylimitsthegrowthrateofChina’seconomy,butmakesatremendousnegativeimpactontheenvironmentwhichisdifficultforustosurvive.Therefore,realizingindustrialstructurelow-carboneffectivelyanddevelopingalow-carboneconomycharacterizedby"low-power,lowconsumption,lowpollutionandlowemissions",becomeChina’snewtargetselectiontotransformeconomicdevelopmentmodeandrealizethegoalofoptimizationandupgradingofindustrialstructureandsustainabledevelopment.

简介：Thequadratictransformationmethodisproposedtoestimatethetrabecularspacing(Tb.Sp),animportantindexforosteoporosisdiagnosis.Theperformanceofthisalgorithmwasinvestigatedbyscattermodel,two-dimensionfinitedifferencetimedomain(2D-FDTD)simulationandinvitroexperimentsofbovinecancellousbonespecimens.Comparingwiththeotherfourmethods—autoregressivecepstrum(AR),adaptivefilter-autoregressivecepstral(AFAR),inversefilter-autoregressivecepstrum(InvAR),andsimplifiedinversefiltertracking(SIFT),quadratictransformationismuchmorestableandaccurate.TheresultsdemonstratedthatquadratictransformationisagreatalgorithmforTb.Spestimation.

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简介：ThisarticleprimarilydiscussestheissueofrealizingsustainabledevelopmentinShandongProvince,Chinathroughtransformation.ItcomparestheglobalenergystructuretoChina’s,aswellasamongregionsandprovinceswithinChina.ThearticletakessixcitiesinShandongProvinceastypicalobjectives,andthenusingprincipalcomponentanalysisitcalculatestheirflexibilityinregardtocityshiftandrestructuring.Themainpurposewastoquantifytheimpactofeconomicactivitiestriggeredbythecoalindustry,a.k.atheenergyeconomicnexus,andtoassesstheflexibilityandsustainabilityintransformationamongtheobservedcoal-basedcities.

简介：Inthispaper,thecompatibilitybetweentheintegraltypegaugetransformationandtheadditionalsymmetryoftheconstrainedKPhierarchyisgiven.Andthestringequationconstraintinmatrixmodelsisalsoderived.

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简介：Calciumsulfatehemihydrate（CSH）whiskersweresynthesizedbyphasetransitioninCaCl2solutionunderatmosphericpressure.Analytical-gradecalciumsulfatedihydrate（ARCSD）wasusedastherawmaterialforthesynthesisofCSHwhiskers,accordingtoorthogonalexperiments.Theeffectsofreactiontemperature,ARCSDcontent,H2SO4content,andreactiontimewereinvestigated,andthecrystallizationconditionswereoptimized.Theas-preparedCSHwhiskersdisplayedaregularmorphologyandahighlyuniformsize,withanaspectratioof105.AsimulationsystemwasalsoestablishedbyblendingvarioussulfateswithARCSD,toevaluatetheeffectsofimpuritiesinfluegasdesulfurization（FGD）gypsum.ThemainaimwastoprepareCSHwhiskersdirectlyfromFGDgypsum,withoutanypurification,usingtheoptimizedconditions.Thisisafacilepotentialalternativeprocessforlarge-scaleproductionofCSHwhiskersusingabundantFGDgypsumassourcematerials.

简介：Atheoreticalmodelthattakesintoaccountthefree-volumeaidedcooperativeshearingofsheartransformationzones(STZs)isdevelopedtoquantitativelyunderstandtheductile-to-brittletransition(DBT)ofmetallicglasses.TheSTZdilatationalstrainisdefinedastheratioofSTZ-activatedfreevolumetoSTZvolumeitself.ThemodeldemonstratesthattheSTZdilatationalstrainwillincreasedrasticallyandexceedthecharacteristicshearstrainofSTZastemperaturedecreasesbelowacriticalvalue.ThiscriticaltemperatureisingoodagreementwiththeexperimentallymeasuredDBTtemperature.OurresultssuggestthattheDBTofmetallicglassesisunderpinnedbythetransitionofatomic-clustermotionsfromSTZ-typerearrangementstodilatationalprocesses(termedtensiontransformationzones(TTZs)).

简介：Inthispaper,firstlywedemonstratetheuseofnodaladmittancematrixtoconvertalow-passband-passfilterbasedonoperationalamplifier(op-amp)toacircuitbasedonasecond-generationcurrentconveyor(CCII).Thistechniqueallowsustogeteightpresumptionsoffiltercircuits.Secondly,wepresentanovelarchitecturecircuitofCCII,whichcanoperateatlowsupplyvoltageof±0.75V.AllsimulationsareperformedbyTSPICEmodels.ThesimulationresultsshowthatthiscircuithasalowimpedanceatterminalX(RX=1.01Ω),averyhighinputimpedanceatterminalY,andwidebandwidthcurrentandvoltage.Thecenterfrequencyoftheproposedfilterisvariableontheinterval[157kHz,196MHz].

简介：Appearanceandexhaustionoftheresourcecityisaninevitableobjectivephenomenonintheprocessofindustrialization.Transformationoftheresourcecitybecamethefocusofattentionwithhighlightingproblemsandcontradictionsinthecity.Thepaperplacesemphasisonpathselectionandtransformationstrategiesofresource-exhaustedcitytransformationtakingthecoalcityPingxiangasanexample.FromtheperspectiveofprofileandeffectivenessoftransformationinPingxiangcity,thepaperanalyzesthemainproblemsinthecitytransformation,pointsoutitsmainpathdirectionfromeconomictransformation,socialtransformationandecologicaltransformation,andfinallypresentstransitionstrategyandpolicyrecommendationstothecity.

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简介：Themartensitic/ferriticsteelshavebeenusedasboilerandturbinematerialsinpowerplants,andalsobeenselectedaspotentialmaterialsforstructuralmaterialsinnuclearreactors.Inthispaper,thekineticanalysisofthemartensiteformationandmicrostructuralcontrolofhigh-Crmartensitic/ferriticsteelsarereviewed.Amodularapproach,incorporatingFisherpartitioningnucleationandanisotropicgrowthforimpingement,wasproposedtodescribethemartensiteformationkineticsunderdifferentcoolingrates.Thekineticanalysissuggestedathermal-activatedgrowthfeatureoccurringduringthemartensitictransformationofmartensiticsteels.Themicrostructurecanbetunedbycompositionoptimizationandvariouscombinationsofheattreatmentparameters(temperature,time,severeandminordeformation).Fortheapplicationinpowerplant,thepotentialofboundary-design,refinementoforiginalaustenitegrainsizeandthefinalmartensiticlath,pinningeffectofstablecarbides,inimprovingtheperformancesofmartensitic/ferriticsteelsatelevatedtemperaturesshouldbeinvestigatedmorethoroughly.Furthermore,effortsshouldbemadetoexploretheeffectsofretainedausteniteontheimprovementofhigh-temperaturecreepstrength.Fortheapplicationofnuclearplants,attemptsshouldalsobemadetoproduceFepowderswithuniformlydistributedoxideparticlesbychemicalreactions.

简介：Theoccurrencemodesofalkaliandalkaline-earthmetals(AAEMs)incoalrelatetotheirreleasebehaviorandashformationduringcombustion.TobetterunderstandthetransformationofAAEMs,thereleasebehaviorofwater-soluble,HCl-soluble,HCl-insolubleAAEMsduringShenmucoal(SMcoal)oxy-fuelcombustioninthepresenceofSO2andH2Oinadrop-tubereactorwasinvestigatedthroughserialdissolutionusingH2OandHClsolutions.TheresultsshowthatthereleaseratesofAAEMsincreasewithanincreaseintemperatureunderthethreeatmospheresstudied.ThehighreleaseratesofMgandCafromSMcoalaredependentonthehighcontentofsolubleMgandCainSMcoal.SO2inhibitsthereleaseratesofAAEMs,whileH2Opromotesthem.TheeffectsofSO2andH2OontheNaandKspeciesaremoreevidentthanthoseonMgandCaspecies.AllthreetypesofAAEMsincoalcanvolatilizeinthegasphaseduringcoalcombustion.TheW-typeAAEMsreleaseexcessively,whereasthereleaseratesofI-typeAAEMsarerelativelylower.DifferenttypesofAAEMmayinterconvertthroughdifferentpathwaysundercertainconditions.BothSO2andH2Opromotethetransformationreactions.TheeffectofSO2wasrelatedtosulfateformationandthepromotionbyH2OoccursbecauseofadecreaseinthemeltingpointofthesolidaswellasthereactionofH2O.