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500 个结果
  • 简介:俄语中少数源自抽象名词的状态词与动词不定式构成的单部句,在语言实践中使用频率较高。文章从OXOTa+ИHФ.型句子的句法属性、聚合体、不定式体的使用、实义切分、语境等方面进行了阐释,以便学生全面掌握、正确灵活运用该句型。

  • 标签: 状态词 动词不定式 句型
  • 简介:放宽QDII限制导致的国内热钱跨境流动,可以缩小A股与H股之间的价格偏差,不过两者之间不可能有完全的套戥,指望同质的A、H股出现同价是天方夜谭。

  • 标签: QDII A股 H股 同价 跨境流动 热钱
  • 简介:快时尚与殿堂级设计师看似光鲜的合作,只是高端品牌博关注、高街品牌掀人气的噱头,何曾狂欢至天明?H&M会和哪家大牌合作推出“XXforH&M”系列?近几年,这个每年都会更新答案的问题成为人们期盼的焦点之一,各种猜测莫衷一是。

  • 标签: for 狂热 高端品牌 设计师 合作 人气
  • 简介:<正>在亚洲的东方,巍然屹立着一个泱泱大国。在她广袤的土地上,孕育着一代代黄皮肤的龙的传人,演绎着无尽的风云传奇。她的辉煌让人侧目,人们在晨曦中瞥见她的侧影,轻吐她的名字:"C—H—I—N—A"。

  • 标签: 风云传奇 龙的传人 C-H-I-N-A 华夏子孙 勤劳勇敢 摇曳多姿
  • 简介:本文对H∞控制理论近二十年来的发展状况进行了综述。首先概括性的介绍了H∞控制理论的发展背景、诞生、发展和成熟。进而,针对近几年我国控制的发展详述了其主要的研究和应用成果。最后,总结了目前H∞控制存在的若干关键问题,并对今后H∞控制的发展进行了展望。

  • 标签: H∞控制理论 不确定系统 综述
  • 简介:H&M是瑞典最大的服装连锁经营商,欧洲第三大最有影响力品牌,成立于1947年。迄今为止,H&M已经成功地在欧洲的18个国家和美国共开设了950家连锁店,

  • 标签: look 初夏 连锁店 经营商 影响力 欧洲
  • 简介:在珍视的模糊集合被考虑的间隔的模糊间隔值的伪巧合的概念。事实上,这个概念是在一个模糊集合的一个模糊的点的伪巧合的一个概括概念。由使用这个新概念,作者定义间隔的观点珍视半的模糊h理想包围的();学习他们的相关性质。另外,作者也与阀值扩大模糊亚群的概念到珍视的间隔的概念模糊与在半戒指的阀值h理想。

  • 标签: 理想状态 区间值 模糊集 模糊点
  • 简介:AbstractObjective:The aim of this work was to explore the feasibility of in vivo and non-invasive monitoring of deuterium/hydrogen (2H/1H) exchange at the metabolic level upon exposure to heavy water (2H2O).Methods:The healthy female mice were randomly assigned to two groups after day 0 when both mice received standard drinking water. The treated mouse was fed with 2H2O (80%, v/v) and the control mouse fed with standard drinking water (H2O) over next 13 days. Real-time mass spectrometric analysis of volatile metabolism emitted through breathing and the skin was performed on days 1, 2, 3, 10, 12, and 13. Animal experiment was approved by the Laboratory Animal Ethics Committee of Jinan University (approval No. 20161117163322) on October 29, 2021.Results:We observed a replacement of 1H by 2H in 52 mass spectral features (60 2H/1H isotopologue pairs) for the mouse fed with 2H2O, but not for the control mouse. These included pyruvic acid and lactic acid, lysine and methyl-lysine as well as short-chain fatty acids comprising acetic acid, propionic acid, butyric acid and valeric acid.Conclusion:Secondary electrospray ionization-high resolution mass spectrometry allows monitoring in vivo2H-incorporation of metabolites in a non-invasive and real-time setup and opens new opportunities to use 2H tracing to extend current metabolic studies, especially those with a focus on anaerobic glycolysis, lysine methylation and gut microbiome via monitoring of short-chain fatty acids.

  • 标签: deuterium isotopes metabolomics non-invasive secondary electrospray ionization-high resolution mass spectrometry
  • 简介:ThispaperstudiestheinfinitetimehorizonmixedH-two/H-infinitycontrolproblemfordescriptorsystemsusingNashgameapproach.Anecessary/sufficientconditionfortheexistenceofinfinitehorizonH-two/H-infinitycontrolispresentedintheformoftwocoupledalgebraicRiccatiequations,respectively.Finally,asuboptimalH-two/H-infinitycontrollerdesignisgivenbasedonaniterativelinearmatrixinequalityalgorithm.

  • 标签: 控制问题 广义系统 无穷水平 纳什 RICCATI方程 线性矩阵不等式
  • 简介:一、免疫抗H鸡血清的制法1.准备免疫抗原:用O型人血球或O型分泌型人的浓缩唾液作免疫抗原。将3—4人的O型新鲜血球混合后,用生理盐水洗3次。将血球泥制成10%的血球生理盐水混悬液,作为抗原。混悬液应在每个免疫日重新制备。

  • 标签: 鸡血清 免疫抗原 混悬液 粘性物质 盐水洗 特异抗体
  • 简介:摘要:目的:探究3H+6H护理模式在老年住院患者中的应用效果。方法:选取2022年1月~2022年6月在我院就诊的老年患者80例,随机均分为对照组和观察组,对照组进行常规护理,观察组采用3H+6H护理模式。统计两组患者的护理满意度以及生活质量。结果:观察组患者的护理满意度以及生活质量均优于对照组(P

  • 标签: 3H+6H护理模式 老年住院患者 优质护理满意度 生活质量 健康教育,护理质量
  • 简介:Thispaperreportstwolanthanidecomplexesofformula(C9H7)Ln(C8H8)·(THF)2whereLnisProrNd,C9H7isindenyl,andC8H8iscyclooctatetraene(COT).ThecomplexeswerepreparedbythereactionofLnCl3withK(C9H7)andK2(C8H8)inTHF.(C9H7)Pr(C8H8)·(THF)2crystallizesinTHFat-15℃inthemonoclinicspacegroupP21:withunitcelldimensionsa=8.446(0),b=10.083(2),c=13.407(3),β=105.48(1)°,V=1100.43(35)3,Dc=1.52g/cm3andZ=2.ThefinalRvalueis0.033,Rwvalueis0.030,respectively.In(C9H7)Pr(C8H8)·(THF)2afive-memberedringcentroidofC9H7,theC8H8ringcentroidandthetwooxygenatomsfromthetwoTHFmoleculesformadistortedtetrahedralgeometryaroundthemetal.

  • 标签: complexes monoclinic membered C8H8)Ln C8H8)Pr C9H7
  • 简介:Thesolidaddofthefirstprotonatedzincoborophosphate,(H3O)Zn(H2O)2BP2O8·H2O(1),wassoventothermallysyn-thesizedbythereactionofZn(NO3)2·6H2OandH3BO3withH3PO4inamixedsolvent,andstructurallycharacterizedbysingle-ystalX-raydiffractionanalysis.ItcrystallizesinthehexagonalP6122,a=0.9604(4)nm,c=1.5297(6)nm,V=1.2218(8)nm^3,Dc=2.921g/cm^3,Z=6,F(000)=1080,μ=3.495mm^-1.Thestmchwefeaturesthatthetetrahedra-te-trahedrahdlcesinterconnectedbyoctahedraandstronghydro-gembondinteractionsformathree-dimensionalframework.Theprotonatedwatermoleculesarelocatedatuniquepositions.othercharacterizationsbyIRandthermalanalysisarealsode-scribed.

  • 标签: (H3O)Zn(H2O)2BP2O8·H2O 合成 结构 质子化 螺旋带状物 硼磷酸锌化合物
  • 简介:Weestablishseveralfundamentalidentities,includingrecurrencerelations,degreeelevationformulas,partitionofunityandMarsdenidentity,forquantumBernsteinbasesandquantumBeziercurves.WealsodeveloptwotermrecurrencerelationsforquantumBernsteinbasesandrecursiveevaluationalgorithmsforquantumBeziercurves.Ourproofsusestandardmathematicalinductionandotherelementarytechniques.

  • 标签: BERNSTEIN 计算算法 BEZIER曲线 开花 塞尔 伯恩斯坦
  • 简介:Theproblemoftherobustfaultdetectionfilterdesignfortime-varyingdelaysswitchedsystemsisconsideredintheframeworkofmixedH_-/H_∞.Firstly,theweightedH_∞performanceindexisutilizedastherobustnessperformance,andtheH_-indexisusedasthesensitivityperformanceforobtainingtherobustfaultdetectionfilter.ThenanovelmultipleLyapunov-Krasovskiifunctionisproposedforderivingsufficientexistenceconditionsoftherobustfaultdetectionfilterbasedontheaveragedwelltimetechnique.Byintroducingslackmatrixvariable,thecouplingbetweentheLyapunovmatrixandsystemmatrixisremoved,andtheconservatismofresultsisreduced.Basedontherobustfaultdetectionfilter,residualisgeneratedandevaluatedfordetectingfaults.Inaddition,theresultsofthispaperaredependentontimedelays,andrepresentedintheformoflinearmatrixinequalities.Finally,thesimulationexampleverifiestheeffectivenessoftheproposedmethod.

  • 标签: 故障检测滤波器 切换系统 时变时滞 滤波器设计 线性矩阵不等式 LYAPUNOV