查询词典 cracking

In the pyrolysis of nalkanes process, abundance of benzene and its homologue show significantly increasing, which can be used as potential distinguishing marks of crude oil cracking.

在正构烷烃的裂解过程中，苯及其同系物的丰度呈明显增加趋势，可以作为原油裂解程度的潜在判识标志。

The relative molar concentration ratios of c(superscript * subscript NO)/c(superscript * subscript NO2) changes as the temperature and pressure change. These results reveal that the two competitive reactions of C-NO2 homolysis (to form NO2) and isomerization may occur during the fast thermolysis of DNTF. NO formation from the cracking of furazan or furoxan rings may be limited by pressure.

结果表明，DNTF快速热裂解的主要产物CO、CO2、NO和NO2的相对摩尔浓度c与温度和压强有关，通过分析相对摩尔浓度比c(上标*下标 NO/c(上标*下标 NO2)随温度和压强的变化，揭示了DNTF中碳硝基C-NO2存在均裂生成NO2和异构化生成NO两条竞争分解的可能途径，同时压强可能抑制呋咱环和氧化呋咱环生成NO的可能性。

Terephthalic acid ; hydrogenator ; stress corrosion cracking ; alkaline washing ; catalyst ; safety analysis

对苯二甲酸；加氢反应器；应力腐蚀开裂；碱洗；催化剂；安全分析

The stress corrosion cracking experiments were conducted using SUS 304 L stainless steel WOL samples in 3.0% NaOH solution by mass fraction at 280℃in order to study the anti-stress corrosion performance of PD-201 hydrogenator made of SUS 304 L stainless steel of purified terephthalic acidplant during alkaline washing without stopping production.

通过用SUS304L不锈钢制作的楔形张开加载预裂纹试样，在280℃、质量分数为3.0%的NaOH溶液的条件下进行应力腐蚀试验，以模拟对苯二甲酸装置的加氢反应器PD-201不停车碱洗工作过程中SUS304L不锈钢在该介质环境下的抗应力腐蚀性能。

Based on the low-velocity impact test, 4 major modes of low-velocity impact damage including delamination and matrix cracking were taken into account FEM simulation.

从z-pin增韧复合材料层合板低速冲击实验出发，考虑了复合材料层合板在受低速冲击时的分层及基体开裂等四种损伤形式，引入适当的损伤判据，对T300/3234碳纤维树脂基复合材料层合板的低速冲击损伤过程进行有限元模拟。

Based on the low-velocity impact test, 4 major modes of low-velocity impact damage including delamination and matrix cracking were taken into account FEM simulation. By using appropriate failure criterion, the low-velocity impact damage of z-pin reinforced laminates can be identified.

从z-pin增韧复合材料层合板低速冲击实验出发，考虑了复合材料层合板在受低速冲击时的分层及基体开裂等四种损伤形式，引入适当的损伤判据，对T300/3234碳纤维树脂基复合材料层合板的低速冲击损伤过程进行有限元模拟。

Weld with trailing impactive rolling is a new technique to reduce the residual stress and distortion and prevent hot cracking of thin-walled structure.

随焊冲击碾压是一种控制薄壁结构焊接应力变形、防止热裂纹的新方法。

A new technology is put forward which uses weld with trailing impactive rolling to control the welding stress and distortion of thin component and to prevent welding hot cracking.

提出了随焊冲击碾压控制薄壁构件焊接应力变形、防止焊接热裂纹的新方法，其原理为：通过前后冲击碾压轮，分别对焊后尚处于高温状态的焊趾和焊缝区金属施加一定频率的冲击碾压力

Author has found the newest theory of high impermeability of concrete for preventing from cracking on the basis of it.

混凝土高抗渗防裂最新抗裂理念的建立，利用了这一关系。

This paper introduces the influence of the polyropylene fiber on plastic shrinkage and anti-permeability of concrete,and the analysis of anti-cracking and impermeability mechanism.

介绍了聚丙烯纤维对混凝土塑性收缩及抗渗性能的影响，并进行机理分析，最后展望了聚丙烯纤维混凝土在渠道防渗工程中的应用前景。

Use nationalization degree and the relationship that commercialize degree, condition of calculable market economy plays scope of optimal and state-owned economy.

利用国有化程度与市场化程度的关系，可计算市场经济条件下最佳国有经济规模。

The kinds of extractant also effected desulfurization rate .

萃取剂对脱硫率的影响也很大，乙二胺的萃取效果优于甲醇的。