简介：Overthepastthousandsofyears,humansocietyhasexperiencedevolutionfromtheprimitivecivilization,theagriculturalcivilization,theindustrialcivilizationandtotheecologicalcivilization,whichisahistoryfromlow-leveltoadvanceddevelopment.Thecoreoftheecologicalcivilizationis"respectingnature,complyingwithnatureandprotectingnature",whichisessentialtoharmoniousco-existencebetweenmanandnature.Thisharmoniousco-existencerequiresconstantlyimprovingsystemandmechanismforthedevelopmentofnationalspace,naturalresourceconservationandutilization,andecologicalenvironmentprotection,torealizethewin-winofresourcedevelopmentandenvironmentalprotection.Itisathousand-yearplafftoachieveecologicalcivilizationbasedonunifiedmanagementofnaturalresources.

简介：那些仍踯躅在人生路口的年轻人啊，当你的青春已逝，心中充满羞愧与悔恨的时候，才悲痛地呼喊：“请把关好的青春年华还给我吧!”这些都已经是徒劳无用的了，当你面前有两条路时，一定要仔细思考后再决定你会选择哪一条。

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简介：Inthispaper,weestablishsomenewdiscreteinequalitiesofOpial-typewithtwosequencesbymakinguseofsomeclassicalinequalities.Theseresultscontainasspecialcasesimprovementsofresultsgivenintheliterature,andtheseimprovementsarenewevenintheimportantdiscretecase.

简介：Inthispaper,theoptimalmaintenancepolicyisinvestigatedforasystemwithstochasticleadtimeandtwotypesoffailures.Thesystemhastwotypesoffailures,onetypeisrepairable,whentherepairablefailureoccurs,thesystemwillberepairedbyrepairman,andthesystemafterrepairisnot“asgoodasnew".Theothertypeoffailureisunrepairable,andwhentheunrepairablefailureoccursthesystemmustbereplacedbyanewandidenticalone.Thesparesystemforreplacementisavailableonlybyorder,andtheleadtimefordeliveringthesparesystemisstochastic.Thesuccessivesurvivaltimesofthesystemformastochasticallydecreasinggeometricprocess,theconsecutiverepairtimesafterfailuresofthesystemformarenewalprocess.Byusingtherenewalprocesstheoryandgeometricprocesstheory,theexplicitexpressionofthelong-runaveragecostperunittimeunderorderingpolicy(N-1)isderived,andthecorrespondingoptimalcanbefoundanalytically.Finally,thenumericalanalysesaregiven.

简介：Thedynamicbehavioroftwo-dimensionalnanostructuresisimportanttothefutureapplicationofnanodevices.Thevibrationalbehaviorsofsingle-layeredhexagonalboronnitride(h-BN)arestudiedbymoleculardynamicssimulationandcontinuumplatemodel.ThebendingstiffnessandPoisson'sratiosofh-BNalongzigzagdirectionandarmchairdirectionarecalculated.H-BNissoftercomparedwithgraphene.Thecontinuumplatemodelcanpredictthevibrationofh-BNwithfouredge-clampedboundaryconditionswell.Theelectricfieldsindifferentdirectionshaveobviousinfluenceonthevibrationofh-BN.Thenaturalfrequencyofh-BNchangeslinearlywiththeelectricfieldintensityalongthepolarizationdirection.Thenaturalfrequencyofh-BNdecreaseswiththeincreaseofelectricfieldintensityalongbothpositiveandnegativenonpolarizationdirection.Whilethenaturalfrequencyofh-BNincreaseswiththeincreaseofelectricfieldintensityalongbothpositiveandnegativetransverseelectricfield.

简介：GivengraphsG1andG2,wedefineagraphoperationonG1andG2,namelytheSSG-vertexjoinofG1andG2,denotedbyG1★G2.LetS(G)bethesubdivisiongraphofG.TheSSG-vertexjoinG1★G2.isthegraphobtainedfromS(G1)andS(G2)byjoiningeachvertexofG1witheachvertexof62-Inthispaper,whenGi(i=1,2)isaregulargraph,wedeterminethenormalizedLaplacianspectrumofG1★G2.Asapplications,weconstructmanypairsofnormalizedLaplaciancospectralgraphs,thenormalizedLaplacianenergy,andthedegreeKirchhoffindexofG1★G2.

简介：使用一位口令经理比不使用一个被知道更方便、安全，在口令经理本身是安全的假设上。然而最近的研究证明很流行的口令管理器有没有用户了解，可以被愚弄漏口令的安全危险。在这份报纸，我们建议一个新口令管理器，SplitPass，它垂直地互相把口令的存储和存取分开成二distrusting聚会。在登录期间，聚会将协作送他们的口令的所有分享到这些聚会的网服务者，而是没有曾经将有完全的口令，它显著地提起块聚会损害所有的成功的攻击。为了保留透明性到存在应用程序和网服务器，，SplitPass无缝地切开安全的窝层(SSL)和运输层安全(TCP)会话在所有聚会处理，并且使加入二口令份额透明到网服务器。我们用一个机器人电话和一个云助手实现了SplitPass并且在机器人正式市场从最高的免费应用软件用100个应用软件评估了它。评估证明SplitPass安全地保护用户口令，当几乎不招致很少表演开销和电源消费时。

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简介：一个新二水平的subspace方法为从无限维的优化问题解决一般非强迫的最小化明确的表达discretized被建议。在每次重复，算法也在当前的水平或粗糙的subspace修正步上执行直接的步。在粗糙的subspace修正步，我们由并列方向和坡度方向在当前的点跨越的二维的subspace扩充传统的粗糙的格子空间。全球集中被证明，集中率在discretized功能上在一些温和条件下面被学习。一些变化问题的初步的数字实验证明我们的二水平的subspace方法是有希望的。

简介：Forthestabilityrequirementofnumericalresultants,themathematicaltheoryofclassicalmixedmethodsarerelativelycomplex.However,generalizedmixedmethodsareautomaticallystable,andtheirbuildingprocessissimpleandstraightforward.Inthispaper,basedontheseminalideaofthegeneralizedmixedmethods,asimple,stable,andhighlyaccurate8-nodenoncompatiblesymplecticelement(NCSE8)wasdevelopedbythecombinationofthemodifiedHellinger-Reissnermixedvariationalprincipleandtheminimumenergyprinciple.Toensuretheaccuracyofin-planestressresults,asimultaneousequationapproachwasalsosuggested.NumericalexperimentationshowsthattheaccuracyofstressresultsofNCSE8arenearlythesameasthatofdisplacementmethods,andtheyareingoodagreementwiththeexactsolutionswhenthemeshisrelativelyfine.NCSE8hasadvantagesoftheclearingconcept,easycalculationbyafiniteelementcomputerprogram,higheraccuracyandwideapplicabilityforvariouslinearelasticitycompressibleandnearlyincompressiblematerialproblems.ItispossiblethatNCSE8becomesevenmoreadvantageousforthefractureproblemsduetoitsbetteraccuracyofstresses.

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简介：当运用一个实验时，试验性的单位的不同类可以导致处理效果的差的评价。因此，在运用实验前选择一个好堵住的图案是合乎需要的。主要，一个单个块变量在文学被使用为简洁对待不同类。在实践，然而，不同类经常来自多堵住变量。最近，称为B2-GMC的一个新标准为二水平的常规图案被建议与多堵住变量。这份报纸在第一次构造一些B2-GMC图案上建议一个系统的理论。实验者们能容易根据构造方法获得B2-GMC图案。B2-GMC图案的职业人员在节4被加亮，并且有小跑尺寸的图案为实际使用在附录B被公布。

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