简介:Themaintenancesequencesofaknowledgebaseandtheirlimitsareintroduced.Someconceptsusedinknowledgebasemaintenance,suchasnewlaws,user'srejections,andreconstructionsofaknowledgebasearedefined;therelatedtheoremsareproved.Aprocedureisdefinedusingtransitionsystems;itgeneratesmaintenancesequencesforagivenuser'smodelandaknowledgebase.Itisprovedthatallsequencesproducedbytheprocedureareconvergent,andtheirlimitisthesetoftruesentencesofthemodel.Somecomputationalaspectsofreconstructionsarestudied.AnR-calculusisgiventodeduceareconstructionwhenaknowledgebasemeetsauser'srejection.TheworkiscomparedwithAGM'stheoryofbeliefrevision.
简介:ContradictionsandclashesofinterestshavebeenpermanentamongtheEUpartners.Theymayevenincreaseaftertherecentroundofenlargement.Stabilityandequilibriumcannotbepossiblysustainedbyeconomicinterdependenceandaccommodationsalone.SotheEUmembershavelearnedtohandlestaterelationswithlaws,treatiesandconsultationmechanisms,whichofferinstitutionalguaranteesforchecksandbalancesandpowersharing.Suchaninstitutionalcommunitybasedontheunificationthroughintegrationmodelwillplayavitalroleinensuringendurance,fairnessandtransparencyoftheorganization.
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:摘要:房屋建筑产业发展下工程试验检测技术的应用也体现了较高的价值,为提高工程检测水平,还要做好各方面的检测工作。文章对工程试验检测的重要性进行分析,探讨工程试验检测的不足与试验检测的优化措施。
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.
简介:摘要公路试验起到对公路工程质量的良好控制的作用。同时降低成本,提高项目质量,保证项目进度。同时,可以延长道路的使用寿命,使道路能够实现良好的发展。因此,公路工程质量检验就显得尤为重要。公路工程存在一些施工质量问题,公路工程试验检测工作是公路工程质量管理和评估验收的重要组成部分和关键环节,完成试验检测工作,以促进原材料和施工工艺的选择,有利于新材料、新技术推广、促进施工质量控制的合理、科学的评价。提高公路试验检测管理水平,对提高公路工程质量起着至关重要的作用。