学科分类
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39 个结果
  • 简介:在临床和法庭毒物学领域,广泛范围药物筛选是一项非常重要而又常被忽视的工作。这项工作的侧重点是所有毒物学相关的物质,无论其结构或极性如何,都能被分离、检测和鉴定。近几年来,我们已尝试建立一个系统的固相提取方法,能够有效地从生物检材中分离出药物,并已经建立了利用单根Bond—ElutCertify固相柱提取的步骤。虽然这个步骤适用

  • 标签: 药物筛选 固相提取 Bond-Elut Certify
  • 简介:OnAugust12,1964,theBritishauthorandjournalistIanFleming,creatorofJamesBond,theworld'smostfamousfictionalspy,diesofaheartattackatage56inKent,England.Fleming'sseriesofnovelsaboutthedebonairAgent007,basedinpartontheirdashingauthor'sreal-lifeexperiences,spawnedoneofthemostlucrativefilmfranchisesinhistory.

  • 标签: 高校 英语学习 学习方法 阅读知识 阅读材料
  • 简介:Thepaperdescribedthreemethodsofscalingthebondportfolioprice.Theywereduration,convexityandtimevalue.FromtheprincipleofNo-arbitrage,therewasoneandonlyonerelationshipofduration,convexityandtimevalue.ItchosethreecorporationbondsofChinaandanalyzedtheriskoftwoinvestmentstrategies.

  • 标签: 风险分析 持续时间 凸性 时间价值 证券市场
  • 简介:ByusingtheLagrange'sintermediatevaluetheorem,itisderivedmathematicallythatthestructur-aldistortionofacoordinationpolyhedronmayleadtoanincreaseinbond-valencesumofthecen-tralatomofion.Theapplicabilitiesofthebond-valencemodelarediscussedinthefollowingtwocases:themodelingofcrystalstructure,andtheindicationofdistortiondegreeofacoordinationpolyhedron.Alsoitisshownthatadistortedpolyhedronshouldbeinfavorofalongeraveragebondlengthorasmallercoordinationnumber.

  • 标签: 化合价 无机晶体结构 拉格朗日中值定理 多面体
  • 简介:the investors to sell or put the bond to the issuer at a,date before maturity. Investors usually put a bond back to,  One example of a fixed rate bond is the Singapore

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  • 简介:债券持有人可把债券卖给发行机构,则让投资者在到期前把债券卖给发行机构,债券的面值是发行债券的机构承诺偿还的金额

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  • 简介:摘要 : 磨矿功指数是矿石可磨性的一个极其重要的指标,是选厂设计时 确定磨机尺寸、介质直径等磨矿关键参数方面不可缺少的依据。为了给建厂设计球磨机选型,以及磨矿介质直径等提供依据,根据试验流程中确定的磨矿细度,对原矿进行 75μm和 45μm两个粒度的 Bond球磨功指数测定试验。

  • 标签: 磨机功指数 振实密度 磨矿关键参数
  • 简介:一个近似方法被建立了计算沿着一张化学契约的在僵绳点的在一个分子的在一个电子上的潜在的行动的深度,由Dpb表示了。是新指示物能被用于预言一张化学契约的力量。在这个工作,作为为表明这个方法的实际应用,我们用方法沿着所有CH和NH化学药品契约计算了deoxyribonucleosides和ribonucleosides的Dpb。结果在对那些结果的公平同意以前报导了试验性、理论的观察。

  • 标签: 化学键 DPB 强度 预测 估测 原位
  • 简介:SincetheinventionofRubylaserbyMaimanin1960s,manykindsoflasersareusedwidelyindentistry.Ithasbeenprovedthatlaserirradiationcanproduceacidetchinglikesurface,thusstrengthenthebondofmaterialtoenamel.Buttheheatgeneratedduringirradiationproducesdamageondentalpulp,whichlimitsthelaserapplicationsondentalhardsurfaces.

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  • 简介:仅仅二个宏观的参数被需要描述线性有弹性的固体的机械性质,即泊松的比率和幼仔是模量。相应地,应该有二个显微镜的参数如果线性有弹性的固体的宏观的机械性质从显微镜的水平被导出,决定材料的机械性质。由这个想法照亮了,为材料的一个多尺度的机械模型,虚拟multi-dimensionalinternal契约(VMIB)模型,被把一张shear契约合并到虚拟内部契约(VIB)建议模型。由这修正,VMIB模型联系宏有分离结构和相应关系在之间的显微镜的机械性质的材料的机械性质微并且宏参数被导出。精力密度功能的张肌质量,包含并列向量,算术地被证明。从观点ofVMIB,材料的宏观的非线性的行为能被归因于强加的变丑导致的虚拟契约分发密度的进化。与这个理论假设,作为一个申请例子,易碎的材料的单轴的压缩失败被模仿。在试验性的结果和模仿的之间的好同意被发现。

  • 标签: 虚拟多空间内结合 材料维度 多刻度模型 分子动力学 虚拟内结合
  • 简介:Theeffectsofthemagneticfieldonthevalencebondpropertyofthedouble-quantum-dotmoleculearenumericallystudiedbythefiniteelementmethodandperturbationapproachbecauseoftheabsenceofcylindricalsymmetryinthehorizontallycoupleddots.Thecalculationresultsshowthattheenergyvalueofthegroundstatechangesdifferentlyfromthatofthefirstexcitedstatewithincreasingmagneticfieldstrength,andtheycrossunderacertainmagneticfield.Theincreasingmagneticfieldmakesthecovalentbondstatechangeintoanionicbondstate,whichagreesqualitativelywithexperimentalresultsandandmakesionicbondstatesremain.Theoscillatorstrengthoftransitionbetweencovalentbondstatesdecreasesdistinctlywiththeincreasingmagneticfieldstrength,whenthemoleculeisirradiatedbypolarizedlight.Suchaphenomenonispossiblyusefulforactualapplications.

  • 标签: 半导体 量子斑点 磁场 价带特性
  • 简介:TheZimbabweanfinancialsectorhasbeenretrogressive,constrained,andunpredictablesincetheyear2000,servingforthemultiplecurrencyperiods(2009-2013)afterthedemonetizationofthedomesticdollar.ThesectorsincethenhasseenanumberofcommercialbanksfailtomeetRBZ(ReserveBankofZimbabwe)minimumcapitalrequirements,putundercuratorship,delistedorliquidatedbecauseofamyriadofoperationalandfinancialchallenges.Theobjectiveofthisstudyistomakeanassessmentofwhetherornottheintroductionofbondnoteshasbeenacurseorblessing.Thestudydrewrawdatafrombankaccountholders,academics,generalpublic,corporateworldandcommercialbanksinMasvingoforanalysisandinterpretation.Thestudyestablishedthatthemajorityofpeople,corporateworldandcommercialbankswerescepticaltoembracethesurrogatebondnotesbecauseoftheuncertainties,operationalandfinancialrisksthattheypausedonthedomesticfinancialmarkets.Itwasalsodiscoveredthatmostbankswerequicktopayclients’withdrawalsinbondnotes,deductUSdollarequivalencesfromtheiraccounts,anddistinguishbondnotesfromUSdollarsatthepointofmakingdepositsandforeignbusinesstransactions.ItwasalsorealizedthattherewasmarketindisciplineandtradinginbiggerUSdollarnotesintheinformalsectorandseriousshortageofthesamenotesintheformalsector.ThestudyconcludedthattheintroductionofbondnotestotradeparalleltotheUSdollarbroughtaseriousshortageofcashonformalmarketsandincreasesinthegeneralpricelevelofgoodsandservices.ThestudythereforerecommendsthattheRBZshouldcompletelywithdrawthebondnotesfromthemarkettoaccordtheUSdollaritsworldmarketvalueandrestoreconfidenceanddisciplineintheZimbabweanfinancialsector.ThestudyalsorecommendsanotheroptionoftheadoptionoftheSouthAfricanRandasaninterventionistwayofsolvingZimbabwe’sliquiditycrises.

  • 标签: BLESSING CURSE BOND NOTES LIQUIDITY crises
  • 简介:Numericalandanalyticalresultsarepresentedforthemagneticorderinginabond-dilutedspin-1/2andspin-1mixedtransverseIsingsystemwithasingle-ionanisotropyonahoneycomblattice.Specialemphsisisplacedonthemagneticorderingunderthebonddilutionandpercolationthreshold.Wediscussindetailtheinfluenceoftransversefieldsofdifferentsublatticsonthenormalmagneticorderingandonthemagneticorderinginducedbysingle-lonanisotropy.Wefindthatthemagneticorderingofasystemexhibitsanexplicitdifferencewhenreceivingthetransversefield.Thisphenomenonhasnotbeenrevealedinpreviousreports.

  • 标签: 磁性材料 ISING模型 磁序
  • 简介:在对称的半身像契约操作考虑,我们在显著Migdal-Kadanoff契约动人重正常化的最新开发的归纳的二种类型组织的这份报纸在场转变递归过程。在这些的申请的优势概括了过程被使用他们学习分别地在典型翻译不变的格子和分数维图形上构造的纺纱连续的Gaussian模型的批评行为说明。象批评代表由这些工具获得了的关联长度那样的结果被发现在有古典结果从的好一致另外的以前的研究。

  • 标签: 递归程序 应用程序 债券 移动 重整化群 临界行为