covalent bond

The formation situation of the band for transition metallic carbonyl cluster compounds is analysed with the bond valence formula for atomic cluster compounds.

本文运用原子簇化合物键价计算公式 ,对过渡金属羰基簇合物成键情况进行了分析 ,利用金属键轨道数 ,价非键轨道数和金属配体成键轨道数计算簇合物价轨道总数 。

The formation situation of the bond for metallocarboranes and metalloboranes is analyses with the bond valence formula for atomic cluster compound.

运用原子簇化合物键价公式，对金属碳硼烷和金属硼烷进行了成键情况分析，提出了碳硼金属三中心键和硼硼金属三中心键的概念，并指出了簇合物型、夹心型和多层夹心型金属碳硼烷的稳定存在主要是形成金属三中心键的缘故。

Effective valences of copper in superconducting oxides were calculated from the concept of bond valence.

从键价的概念出发，对氧化物超导体中铜离子的有效电荷进行了计算。

Chemical bond mainly includes electrovalent bonds, covalent bonds, and metalic bonds.

化学键主要有离子键、共价键、金属键。

All five valences are the ordinary, nonpolar ones.

所有5个价键都是普通的非极性键。

Every carbon atom has four bonds.

每个碳原子的价键为四。

Several weak molecular interactions responsible for the maintenance of tertiary structure of proteins are covalent, ionic, hydrogen, and hydrophobic or hydrophilic bonds.

一些决定蛋白质三级结构的主要的弱分子作用力为共价键,离子键,氢键,疏水键和亲水键。

The atom that contributes no electrons to a covalent bond.

受体没有给共价键提供电子的原子

In the valence bond treatment, explicit recourse is made to classical, localized bond structure.

价键法明显依赖经典的定域结构。

In covalent bonding, atoms share electrons.

在共价键联中，原子共有电子。

a covalent bond in which both electrons are provided by one of the atoms.

两个电子都由一个原子提供的共价键。

A new algorithm for inactive orbital optimization in valence bond theory

价键方法中的非活性轨道优化新算法

Study of relation between the superconductivity of Bi_2Sr_2CuO_6 and its chemical bond and structure

Bi_2Sr_2CuO_6超导性与价键关系的研究

Keywords] pricing standards, bill of quantities, bid quoting.

[关键词]计价规范,工程量清单,投标报价.

Value Dealing--An Important Link In Value Operation;

“价值营销”——价值运筹的关键一环

Study on Ad Words Auction Model with Reserve Price

基于保留价格的关键字竞价模型研究

Key expressions] labor； production capacity； market share.

[关键词]剩余价值；生产力；市场占有率。

The keywords： macroscopic distribution, law, the constellation drawing of price.

关键词：宏观分配、律，价格星座图。

The Research on the Key Indexs of Urban Transportation Performance;

道路交通运行状态评价关键指标研究

ROI Forecasting on Google Keyword Advertising;

Google关键词广告竞价的收益率预测

Revenue Equivalence for AdWords Auction;

关键字广告位拍卖的收益等价性研究