查询词典 activation energy

Activation energy: The difference in energy between that of the activated complex and that of reactants, the energy that must be supplied to the reactants before they can undergo transformation to product.

活化能：使低能分子达到活化状态所需要的能量。

In order to set up a CA model that has a better physical significance, a new second criterion, considering the effects of the thermodynamic mechanism and the activation energy, was appended for the transition of cellular state. The grain growth processes were investigated for different temperatures and activation energies, respectively.

摘 要：为建立一个具有更好物理基础的晶粒长大仿真模型，采用CA法，基于热力学和能量机制，提出元胞取向状态转变的二次判断方式，制定相应的转变规则，并对不同温度和材料迁移激活能条件下晶粒长大过程进行模拟研究。

A method was developed to determine the activation energy and material parameters in the hyperbolic sine constitutive equation.The activation energies determined are 570 kJ／mol and 548 kJ／mol for steel T122 in saturation stress and peak stress,respectively.The values of critical strain for dynamic recrystalli...

采用应变硬化速率—应力曲线图较精确地获得了饱和流变应力和峰值应力；用回归法确定了双曲线本构方程中的变形激活能及材料常数，确定了T122钢在饱和应力和峰值应力条件下的变形激活能分别为570和548 kJ／mol；采用力学方法直接从流变曲线确定了T122钢发生动态再结晶的临界应变量，并回归出临界应变量与Zener—Hollomon参数的关系式。

Yet, in the temperature range of 700-750℃, the deformation activation energies were much higher than the self-diffusion activation energy of grain boundary.

在850℃变形激活能与晶界自扩散激活能十分相近，表明晶界扩散控制的晶界滑动是超塑性变形的主要机制。

Our experimental results provide compelling evidence that conventional activation energy studies yield a "mobility gap" which can be very different from the real spin gap in the energy spectrum.

我们的实验结果提供了可信服的证据，说明了由传统的的活化能方式所得到的是"迁移率能隙"，这与真实的自旋能隙有很大的不同。

In Na2CO3-NaHCO3 buffer solution, the apparent activation energy and activation parameters for cetyl trimethylammonium bromide micelle-catalytic hydrolysis of p-nitrophenyl propionate have been measured, and the effects of inorganic salts (such as NaCl, NaBr and Na2SO4) on them have also been investigated.

在Na2CO3-NaHCO3缓冲溶液中，测定了对硝基苯酚丙酸酯的十六烷基三甲基溴化铵胶团催化反应的表观活化能和活化参数；考察了无机盐(NaCl， NaBr， Na2SO4)对该催化反应的影响。

The activation energy for deformation in W18Cr4V high speed steel, 40CrMnNiMo tool steel for plastic molding and AISI H13 hot-work tool steel are investigated intensively. The investigation shows that the activation energy for deformation of both 40CrMnNiMo tool steel for plastic molding and AISI H13 hot-work tool steel decrease with the increasing of temperature.

分别将这两种钢的变形激活能数学模型用于蠕变模型，并采用这一改进后的蠕变模型对W18Cr4V高速钢和40CrMnNiMo塑模钢的热变形流变应力进行预测，结果表明，此模型不仅能精确描述蠕变条件下工模钢的流变应力变化规律，也能精确描述工模钢非蠕变条件下的流变应力。

To estimate the activation energy of the decomposition, the Friedman isoconversional method was applied. The activation energy was calculated as a function of conversion. The results confirm that more than one reaction occurs in the decomposition of basic zinc carbonate.

采用Friedman法对实验数据进行分析，结果表明，反应的活化能数值随着分解率的不同而变化，由此推断该反应是由多步反应组合而成的，其平均表观活化能E。

The results indicated that a dependable kinetic model could be obtained by modifying the Temkin equation by considering the H2 and NH3 adsorption factors. Activation energy for the ammonia synthesis reaction was obtained as 90.2 kJmol^(-1) after linear fitting the kinetic and thermodynamic parameters k, K(subscript H2) and K(subscript NH3) with the Arrhenius and Van't Hoff equation, which was much lower than that over iron-based catalyst, which indicated that the activation energy barrier of N2 dissociative adsorption on Ru was far lower than that on either the conventional magnetite-based catalyst or wustite-based catalyst; the hydrogen adsorption heat was 76.2 kJ mol^(-1), indicating that the adsorption of hydrogen on the Ba-Ru-K/AC catalyst was so strong that it inhibitied the dissociative adsorption of nitrogen.

结果表明，在Temkin方程中加入H2和NH3的吸附项能够获得可靠的动力学模型，用Arrhenius和Van't Hoff方程对动力学和热力学参数k、K(下标 H2)和K(下标 NH3)进行线性拟合，得到氨合成反应的活化能为90.2 kJmol^(-1)，远低于铁基催化剂，说明Ru上N2的解离吸附活化能垒远低于传统磁铁矿基催化剂和维氏体基催化剂。H2的吸附热为76.2 kJmol^(-1)，证明Ba-Ru-K/AC催化剂上H2的吸附较强烈，对N2的吸附有强烈的抑制作用。

Once the temperature of the environment exceeds the critical explosion temperature, the delayed-action time will shorten along with the temperature of the environment ascending;(2) The thermal decomposition reactivity activation energy and correlative parameters of the emulsion explosive matrix and corresponding mixture of emulison explosive with combustible oil solvent were obtained by iron-plate experiment, thereinto, the activation energy of the emulsion explosive matrix is 163.3kJ/mol.

一旦环境温度超过临界爆炸温度，随环境温度的升高，爆炸延滞期将变短；(2)通过铁板实验获得了乳化炸药基质及其与有机溶剂混合物的活化能和相关参数，其中乳化炸药基质的活化能为163.3kJ/mol。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。