Studies on organoarsenic compounds& ⅶ. reaction of arsonium ylides with ketene dimer

Alkyl ketene dimer ( AKD) as a kind of neutral/ alkaline size is widely used in alkaline papermaking.

AKD作为一种中/碱性施胶剂，在碱性造纸中得到广泛的应用。

Recent Development of Sizing Material& Alkyl Ketene Dimer ( AKD) for Neutral Sizing

施胶技术的近期发展&以烷基烯酮二聚体进行中性施胶

Efficiency and Reversion of Alkyl Ketene Dimer Sizing in Calcium Carbonate Filled Papers

在碳酸钙加填纸中AKD施胶的有效性和逆转性

Theoretical Study of Molecular Faces of Several Pentabasic Cyclic Compounds and the Dimer System

几个五元环化合物和二聚体体系的分子形貌的理论研究

On the contrary, the cyclic dimer of tetramethyl-m-silyephenylene siloxane can not be polymerized at all under the same condition.

而在相同的条件下，四甲基间硅苯撑硅氧烷的环状二聚体却完全不聚合。

Synthesis of a Cyclic Dimer of Dibenzo-18-crown-6 Containing Rigid 4,4 ′-Bis ( aminomethyl) biphenyl Spacer

4,4′-二胺甲基联苯搭桥的二苯并-18-冠-6环状二聚体的合成

Preparation of α-Methylstyrene Cyclic Dimer

α-甲基苯乙烯环二聚体的研制

Study on Synthesis of α-methylstyrene cyclic dimer

阳离子交换树脂催化合成α-甲基苯乙烯环二聚体的研究

It chooses the standardized dimensionless quantity method in this conversion. ( 4) The dissertation constructs an index evaluation model system of the three-dimension financial competitiveness based on the index system of the three-dimension financial competitiveness, which includes synthetic model, matrix model and cubic model.

在设计的三维财务竞争力指数体系基础上，构建了三维财务竞争力指数评价的模型体系，包括综合模型、矩阵模型、立方模型。

Derived from the Newton law and Hertz equation, a dimensionless quantity, called the relative erosion strength, is found to be a constant during the impacting of an abrasive particle on ductile materials.

从牛顿定律和赫兹方程导出一个称为量钢一的量的相对冲蚀强度，发现在磨拉冲击韧度材料过程中保持不变。

The authors suggest a new dimensionless quantity N and try to interpret its physical meaning and predict a "neutral stability curve" in Ma-N map.

文中提出新的无因次量N并解释了其物理意义，还指出Ma-N图上存在一条中性稳定曲线。

Introducing the dimensionless quantity Mo and Eo investigate the trend of break time.

引入无因次量Mo数和Eo数，研究了液膜破裂时间的变化趋势。

Dimensionless Quantity Method, Natural Unit Method, Characteristic Quantity

无量纲化自然单位法特征量

The numerical results of average dimensionless equivalent conduction coefficient Keq obtained in this paper agree well with previous experimental results.

在相同条件下计算结果和实验结果符合很好。

The use of lower dimensionless integrated coefficient and moderate dimensionless support damping coefficient and/ or higher dimensionless rotor external damping coefficient can decrease the unstable region.

采用较低的无量纲综合系数和适当的无量纲支承阻尼系数和／或较大的无量纲转子外阻尼系数可以缩小失稳区；

This paper describes the methods of fan testing and making fan property curve by dimensionless characteristic coefficient for the cooling fan of air-cooled engines.

论述了风冷发动机冷却风扇的试验法和用无因次特性系数法制取风扇特性曲线的方法。

The evolution of 2/ 1 mode relative to the dimensionless viscous coefficient and the distribution of current density is given.

结果给出了2/1模的演变过程对无量纲粘滞系数的依赖关系和电流密度的分布。

A dimensionless coefficient C_b which is dependent on R/ B and bedload friction coefficient is defined This model verifies theoretically the maximal values of rate of bend migration as R/ B is value between 2 and 4.

模式中引入了一个与R/B和床沙摩阻系数有关的无量纲系数C b，从理论上证明了当弯道R/B介于2～4之间时，蠕动速率取最大值。

Dimensionless coefficient method of designing the welding section of axial pressure component with H shape

焊接H形轴压构件截面设计的无量纲系数法

The numerical results show that mass ratio, dimensionless relaxation coefficient and dimensionless elastic constant ratio all have influence on the dynamic characteristics and stability of the viscoelastic pipe conveying fluid.

计算结果表明，质量比、无量纲松弛系数及无量纲弹性常数比对输流管道的动力特性均有影响。