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简介：这篇论文考虑最佳的预防维护的一个问题和奉献给从已知的存款提取资源的设备的代替时间表。典型例子是油练习，矿铲，等等。至多，在新的存在机械的一代替被允许。这个问题作为一个最佳的控制问题题目被提出到在任何给定的时间的留下的存款是非否定的州的限制。我们证明如果要求，最佳的预防维护，生产率，和存在机械和新机械的代替和抢救时间能被顺序解决一系列free-end-point获得最佳的控制问题。而且，一个算法基于这结果被开发并且过去常解决二个解说性的例子。

简介：Themaintenancesequencesofaknowledgebaseandtheirlimitsareintroduced.Someconceptsusedinknowledgebasemaintenance,suchasnewlaws,user'srejections,andreconstructionsofaknowledgebasearedefined;therelatedtheoremsareproved.Aprocedureisdefinedusingtransitionsystems;itgeneratesmaintenancesequencesforagivenuser'smodelandaknowledgebase.Itisprovedthatallsequencesproducedbytheprocedureareconvergent,andtheirlimitisthesetoftruesentencesofthemodel.Somecomputationalaspectsofreconstructionsarestudied.AnR-calculusisgiventodeduceareconstructionwhenaknowledgebasemeetsauser'srejection.TheworkiscomparedwithAGM'stheoryofbeliefrevision.

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简介：ContradictionsandclashesofinterestshavebeenpermanentamongtheEUpartners.Theymayevenincreaseaftertherecentroundofenlargement.Stabilityandequilibriumcannotbepossiblysustainedbyeconomicinterdependenceandaccommodationsalone.SotheEUmembershavelearnedtohandlestaterelationswithlaws,treatiesandconsultationmechanisms,whichofferinstitutionalguaranteesforchecksandbalancesandpowersharing.Suchaninstitutionalcommunitybasedontheunificationthroughintegrationmodelwillplayavitalroleinensuringendurance,fairnessandtransparencyoftheorganization.

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简介：TheSichuan-TibetandQinghai-TibetHighwayswerebuiltandopentotrafficin1954.Today,themileageofhighwaysopentotrafficreachesover40,000km.Thousandsofmaintenanceworkershavebeenworkingonthemoverthepast50years.Theyincludewhatwecalliron-willwomenwiththeGyiagyiaroadsectionteam.

简介：在生产工业的许多设备，公司不仅在产品价格上，而且在维护服务上与对方竞争。面向的公司为他们与维护服务(P&S捆)绑的顾客产品正在提供的越来越传统的产品。在这研究，我们检验公司刺激在市场由两家卖主垄断的局面与长期的维护或修理支持服务为顾客提供产品捆绑竞争环境。当提供P&S捆时，决定服务水平的坚挺的需要(以为在这份报纸的服务的平均反应时间保证)满足要求到提议和需要造一台服务设备处理维护。基于三个亚比赛模型的分析，我们描绘仅仅一个公司，两个公司或两个公司将在提供P&S捆的市场条件。最后，我们在公司策略选择上分析山猫的一种市场因素的affects。

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简介：AbstractVascular access is the lifeline of hemodialysis patients. There are great differences in the establishment and use of vascular access in different countries and regions around the world. We believe that on the basis of good evaluation and planning, it is recommended that hemodialysis patients choose native arteriovenous fistula first. In view of the new progress of vascular access views domestic and international at home and abroad in recent years, we organized experts to recommend the establishment and maintenance of arteriovenous fistula (AVF) for the Chinese population, including preoperative evaluation and planning of the establishment of AVF, AVF surgery, perioperative drug intervention measures and postoperative maintenance, and put forward suggestions for future research directions. The recommendations in this consensus are general and clinicians need to make treatment decisions based on the actual situation.

简介：DuringmyinterviewwithZholma,PartySecretaryoftheXigazePrefectureCommunicationsBureau,shetoldmethefollowinginterestingstory:Mymotheris85thisyear.Shehasthreechildrenwhoareallroadmaintenanceworkers.In1952,mothertookayoungersisterfromLhasatoNyingchi,whereshemetthePLAandjoinedaroadconstructionteam.TheroadwasbeingbuilttoLhasaandthentoXigaze.

简介：ShorttapholelengthisoneofthemosttroublesomeproblemsofBaosteel’sCorex-3000afteritsstartup.Owingtothemeltergasifierprocess,thecharbedfloatedupanddownasthelevelofhotmetalandslaginhearthchanging.Thesecausealotofproblemssuchastheheavyerosionoftapholeareasandhardcasthousework.ThehighsecondtappingflowisanoticeablecharacteristicofCorexprocess.Thereasonsofshorttapholeisanalysed,andcountermeasuresareputintopractice,someimprovementsarecarriedoutinmodule2Corex-3000.

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简介：Smeconceptsusedinknowledgebasemaintenace,suchassequence,newlaw,user'srejectionandreconstructionsofaknowledgebase,arefirstintroduced,andthenaframeworkforextendedlogicprogramming(ELP)isgiven,whereanextendedlogicprogramisequivalenttoaknowledgebase.AtransitionsystemcalledR-calculusforELPisprovided.Foragivenknowledgebaseandauser'srejection,theR-calculusforELPwilldeducebestrevisionsofthebase.ThesoundnessandthecompletenessoftheR-calculusforELPareproved,andtheR-calculusforELPisimplementedinProlog.Inaddition,theresearchiscomparedwithotherrelevantwork.

简介：AIMTocomparevonoprazan10and20mgvslansoprazole15mgasmaintenancetherapyinhealederosiveesophagitis(EE).METHODSAtotalof607patientsaged≥20years,withendoscopically-confirmedhealedEEfollowing8wkoftreatmentwithvonoprazan20mgoncedaily,wererandomized1:1:1toreceivelansoprazole15mg(n=201),vonoprazan10mg(n=202),orvonoprazan20mg(n=204),oncedaily.Theprimaryendpointofthestudywastherateofendoscopically-confirmedEErecurrenceduringa24-wkmaintenanceperiod.ThesecondaryendpointwastheEErecurrencerateatWeek12duringmaintenancetreatment.Additionalefficacyendpointsincludedtheincidenceofheartburnandacidreflux,andtheEEhealingrate4wkaftertheinitiationofmaintenancetreatment.Safetyendpointscomprisedadverseevents(AEs),vitalsigns,electrocardiogramfindings,clinicallaboratoryresults,serumgastrinandpepsinogenⅠ/Ⅱlevels,andgastricmucosahistopathologyresults.RESULTSRatesofEErecurrenceduringthe24-wkmaintenanceperiodwere16.8%,5.1%,and2.0%withlansoprazole15mg,vonoprazan10mg,andvonoprazan20mg,respectively.Vonoprazanwasshowntobenon-inferiortolansoprazole15mg(P<0.0001forbothdoses).Inapost-hocanalysis,EErecurrenceatWeek24wassignificantlyreducedwithvonoprazanatboththe10mgandthe20mgdosevslansoprazole15mg(5.1%vs16.8%,P=0.0002,and2.0%vs16.8%,P<0.0001,respectively);bycontrast,theEErecurrenceratedidnotdiffersignificantlybetweenthetwodosesofvonoprazan(P=0.1090).Thesafetyprofilesofvonoprazan10and20mgweresimilartothatoflansoprazole15mginpatientswithhealedEE.Treatment-relatedAEswerereportedin11.4%,10.4%,and10.3%ofpatientsinthelansoprazole15mg,vonoprazan10mg,andvonoprazan20mgarms,respectively.CONCLUSIONOurfindingsconfirmthenon-inferiorityofvonoprazan10and20mgtolansoprazole15mgasmaintenancetherapyforpatientswithhealedEE.

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