valence bond 价键(55) 价键理论(27)   价键      A Valence Bond Method Study for S_N2 Reaction X_l~-+CH_3X_r→X_lCH_3+X_l~-(X_l=X_r=F,Cl,Br,I)      S_N2反应X_l~-+CH_3X_r→X_lCH_3+X_l~-(X_l=X_r=F,Cl,Br,I)的价键方法研究 短句来源      Quantitative Valence Bond Studies of the Isoelectronic Series XO_3~- and BF_3      等电子系列XO_3~-及BF_3的定量价键阐述 短句来源      Valence Bond Studies of Several Substituted Benzenes Ph--X(X=F,OH,NH2)      对取代苯Ph一X（X＝F，OH，NH_2）的价键理论研究 短句来源      Using the valence bond theory of solid, the electronic structure of FCC base ordered Al Li intermetallic compounds has been analysed systematically, the results showed that the hybrid order of Al atom in these compounds is unchanged.      用固体价键电子理论对FCC基有序AlLi金属间化合物的电子结构进行了分析，结果表明Al原子在这些化合物中杂阶状态没有发生变化。 短句来源      A New Algorithm for the Permanent Approach to Valence Bond Theory      价键理论的不变式方法的新算法 短句来源 更多          价键理论      Valence Bond Studies of Several Substituted Benzenes Ph--X(X=F,OH,NH2)      对取代苯Ph一X（X＝F，OH，NH_2）的价键理论研究 短句来源      A New Algorithm for the Permanent Approach to Valence Bond Theory      价键理论的不变式方法的新算法 短句来源      The bonding parameter and charge deviation of Fcc base ordered Al Li intermetallic compounds have been calculated by using metal valence bond theory.      用余氏金属价键理论计算了Fcc基有序Al－Li金属间化合物的键参量和原子间成键的电荷偏移量。 短句来源      Recent Pfogress in Valence Bond Theory      价键理论新进展 短句来源      Valence Bond Study of the Stability of Cyclenes      轮烯稳定性的价键理论研究 短句来源 更多          “valence bond”译为未确定词的双语例句      VALENCE BOND OFFSETS OF STRAINED HETEROJUNCTION ZnS/ZnSe, ZnS/ZnS x Se 1- x AND ZnSe/ZnS x Se 1- x      应变层异质结ZnS/ZnSe、ZnS/ZnS_xSe_(1-x)和ZnSe/ZnS_xSe_(1-x)价带带阶的研究 短句来源      Using the group theory, this paper derives the σ hybrid fashion and π hybrid fashion of the central atoms of ML_7 type and ML_(11) type complexes, thus proves the valence bond structure of ML_7 type and ML_(11) type complexes.      本文运用群论方法,导出了ML_7型和ML_(11)型配合物中央体的σ杂化方式和π杂化方式,从而论证了ML_7型和ML_(11)型配合物的价健结构. 短句来源      VB-MP2: A Hybrid Method Combining Valence Bond Theory and Many-body Perturbation Theory      从头算VB-MP2组合方法 短句来源      The part of V-O valence bond was broken due to the damaging effect of high dose argon and V_2O_5 structure was changed to VO_2 when the free oxygen combined with implanted hydrogen.      利用注入氢的还原效应将V2O5转换成VO2薄膜; 短句来源      Progress in Modern Valence Bond Theory      现代价键理论研究进展 短句来源 更多        查询“valence bond”译词为用户自定义的双语例句     我想查看译文中含有：的双语例句 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法，我们为您准备了出自英文原文的大量英语例句，供您参考。   valence bond d-symmetry superconductivity due to valence bond correlations 例句来源       It is shown that d-symmetry superconductivity due to valence bond correlations is possible. 例句来源       Valence bond correlations are compatible with antiferromagnetic spin order. 例句来源       In order to explictly construct a homogeneous state with the valence bond structure in the two-dimensional Hubbard model for an arbitrary doping, we have used the variational method based on unitary local transformation. 例句来源       Attraction between holes in the d-channel is due to modulation of hopping by the site population in course of the valence bond formation, and corresponding parameters have been calculated variationally. 例句来源       更多                    The O—H…: C system is approximately considered as a four electron system. Using valence-bond method, the delocalization energy of this H bond system was calculated. The wave function of the four electron system was takon as a linear combination of the following three valence bond wave functions: (Ⅰ) (?)-H:C≡ψ_1 (Ⅱ) (?) (?):C≡ψ_2 (Ⅲ) (?) H——~+C≡ψ_3 ψ=c_1ψ_1+c_2ψ_2+c_3ψ_3 The H_(μμ) and H_(μν) integrals were calculated by the semi-empirical method proposed by Coulson and Danielss...             将O—H…:C体系近似地看成四电子体系用价鍵法計算了这个氢鍵体系的“离位能”。取下列三个“价鍵式”波函数的綫性組合作为四电子体系的波函数:积分H_(μμ),H_(μν)的值用Coulson及Danielsson所建議的半經验法估計。計算了在L(O—H…:C)=2.80,L(O—O)=0.99时,体系O—H…:C的离位能为8.0仟卡。将这个值与O—H…:O体系的离位能6.8千卡(Coulson及Danielsson的估計)对比,可以得出結論:異腈的碳原子由于具有独对电子可以作为質子接受体形成氢鍵。 文摘来源          The electronic structure of mononuclear complexes of transition elements such as MCp2, MCp2Ln, where Cp represents cyclopentadiene anion, L represents ligands such as H, halogen anions, CO, CH2 = CH2, etc, was discused from the combined point of view of valence bond-molecular orbital method.             现代的络合物结构理论主要有价键理论、晶体势场和配位势场理论,以及分子轨道理论。价键理论着重讨论络离子的骨架结构,把结合力分为电价键和共价键;晶体势场理论和配位势场理论着重讨论金属离子的价电子行为,把络离子分为高自旋和低自旋两类;分子轨道理论则着重讨论络离子的整体结构,它不区分各类成键电子的特点,也不明显表示共价键的方向性和饱和性。 三种理论各在不同方面和不同程度上反映了络合物结合力的本质,因此它们之间有必然的联系。本文尝试在徐光宪提出的价键轨道理论的基础上分析络离子结合力的本质,并自然地推出上述三种理论的概念和形式。 文摘来源          The carboxylated polypropylene composite cation exchange resin is obtained by heterogeneous graft copolymerization of a mixture of acrylic acid and methacrylic acid onto the particles of polypropylene. Each of the branched chains is linked together with the tertiary carbon atom of polypropylene through primary valence bond, but with no cros-slinking between them. They are therefore almost completely extended and rotate freely in ionic solution and thus confer good exchange and chelating adsorpti...             以丙烯酸-甲基丙烯酸混合单体在聚丙烯颗粒表面进行非均相接枝聚合,得带有聚羧酸表层的聚丙烯复合离子交换树脂。和常见的交联型离子交换树脂不同,聚羧酸支链未经化学或物理交联,它仅以末端和聚丙烯链节中的叔碳原子相连而锚着于颗粒表面;在水溶液中,不仅每一链节可以适度旋转,而且整个支链可以自由伸展。这一结构赋予羧化聚丙烯复合离子交换树脂以优异的交换和吸附性能。 文摘来源   << 更多相关文摘         相关查询: bond valence bond valence sum average bond valence bond-valence valence bond approach valence bond structure secondary valence bond valence bond theory valence bond method bond valence model valence bond state valence bond states  对查询结果不满意

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