1) pre-exponential frequency factor
指前频率因子
1.
By varying separately the pre-exponential frequency factors,the simulations show that smoldering spread rate increases with the increasing of A2(fuel oxidation),but decreases with A1(fuel pyrolysis) and A3(char oxidation).
通过改变3个反应指前频率因子发现:增大A2(燃料氧化频率因子)会加速阴燃,增大A1(燃料热解频率因子)和A3(焦炭氧化频率因子)均会减小燃料阴燃传播速度。
2) pre-exponential factor
指前因子
1.
42 kJ/mol,pre-exponential factor is lnA=13.
42kJ/m o l、指前因子lnA=13。
2.
The results show that the assumption that activation energy E and pre-exponential factor A change with temperature is approximate.
结果表明,Arrhen ius公式中活化能E和指前因子A与温度无关的假设是近似的。
3.
The results show that there are obvious effect of the size on the reaction order,the rate constant,the activation energy and the pre-exponential factor,that with the particle size decreasing,the rate constant and the reaction order increase,the pre-exponential factor and the apparent activa.
结果表明:反应物粒度对多相反应的反应级数、速率常数、表观活化能和指前因子均有较大的影响;随着反应物粒径的减小,表观活化能和指前因子减小,而反应级数和速率常数增大,并且速率常数和表观活化能与反应物粒径的倒数呈线性关系;这些影响规律与理论模型是一致的。
3) frequency factor
频率因子
1.
The mechanism equation of pyrolysis reaction,activation energy(E) and frequency factor (A) were obtained by using differential method to fit experimental data.
采用微分法对实验数据进行回归拟合,确定污泥热解机理方程,并求出反应动力学活化能和频率因子。
2.
Kinetic data (rate constant, Arrhenius activation energy and frequency factor) of the cross-linking reaction of polymaleic acid with silk have been determined by means of isocratic HPLC measuring the proportion of polymaleic acid that does not react with silk.
２８ＫＪ／ｍｏｌ，频率因子为２３。
3.
The multi-scales approach is used to analyse the harmonic resonance frequency factors existing in the system; and the frequency-response equation of steady vibration of the primary resonance under the action of internal excitation .
运用多尺度方法分析了系统中存在的多种谐波共振频率因子,导出了系统在内部激励作用下主共振响应时稳态振动的频率响应方程,绘制了相应的频率响应曲线,并分析了系统中的静态载荷、动态载荷及阻尼对主共振响应的影响。
4) alterable preexponential factors
变指前因子
5) frequency gene matrix
频率因子阵
6) fixed preexponential factors
固定指前因子
补充资料：指前因子
分子式：
CAS号：
性质：阿伦尼乌斯公式k=A·e-Ea/RT中，k、R、T、Ea分别是化学反应速率常数、摩尔气体常数、反应温度及活化能，式中的A称为指前因子。它是一个只由反应本性决定而与反应温度及系统中物质浓度无关的常数，与k具有相同的量纲。A是反应的重要动力学参量之一。
CAS号：
性质：阿伦尼乌斯公式k=A·e-Ea/RT中，k、R、T、Ea分别是化学反应速率常数、摩尔气体常数、反应温度及活化能，式中的A称为指前因子。它是一个只由反应本性决定而与反应温度及系统中物质浓度无关的常数，与k具有相同的量纲。A是反应的重要动力学参量之一。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条