辛烷

Furthermore, the main volatiles rom Hippophae rhamnoides included Nonane, Octane, 3-methyl-1-Butanol, Pentanal, 2-methyl- Butanal, 2-Hexen-1-ol, 2-Hexenyl benzoate in close natural state.

在近自然状态下，壬烷、辛烷、3-甲基丁醇、戊醛、2-甲基丁醛、2-壬烯醇、2-苯甲酸叶醇酯为沙棘枝叶主要挥发物组分。

The experimental results indicated that under the steady operating conditions, the ignition timing of the base fuel (PRF90-90% iso-octane+10% n- heptane), which is equivalent to RON 90, delayed and the peak value of the heat release rate was low compared to the base fuel with single additive (Ditert-butyl peroxide-DTBP, Dicumyl peroxide-DCP, Tert-butyl hydroperoxide-TBHP, Tert-butyl cumyl peroxide -TBCP or Cumene hydroperoxide-CPO) which advanced ignition timing and increased the peak of the heat release rate obviously.

试验结果分析表明，在HCCI发动机燃烧稳定工况下，没有添加剂的基础燃料记作PRF90(为90%异辛烷与10%正庚烷的混合，相当于90号汽油)着火滞后，燃烧放热率峰值低，而混有单一添加剂(Ditert-butyl peroxide-DTBP、Dicumyl peroxide-DCP、Tert-butyl hydroperoxide-TBHP、Tert-butyl cumyl peroxide-TBCP或Cumene hydroperoxide-CPO)的基础燃料则着火明显提前，燃烧放热峰值升高。

Fuel Design and Management; N-heptane; Iso-octane; Homogeneous Charge Compression Ignition; Stratification; Compound Combustion

燃料设计与管理；正庚烷；异辛烷；均质压燃；分层；复合燃烧

In order to analyze the thermal cracking products of fuels, we set up a GC analytical system. The gas products, which comprise methane, ethane, ethylene, propane, propylene and other gases, were collected and analyzed by gas chromatography provided with a flame ionization detector . We calculate the theoretical heat sink of n-heptane at the temperature of 600℃ and 800℃. The theoretical heat sink calculation of iso-octane at 700℃ is also related.

建立了用于分析裂解产物的气相色谱分析系统，解决了本研究中对气态裂解产物的分析要求，特别是气态小分子饱和烃和不饱和烃的有效分离；并根据裂解产物的组成及其生成热数据，对正庚烷在600℃和800℃，异辛烷在700℃时裂解的热沉进行了理论计算。

The combustion characteristics of iso-octane/diesel and ethanol/bio-diesel both show a two-stage heat release without HCCI low temperature reactions.

本文首先采用双燃料的方式，对正庚烷/柴油、异辛烷/柴油、乙醇/生物柴油这三种双燃料组合的HCCI/DI分层复合燃烧与排放特性进行深入研究和比较分析。

A new method of fuel design to control HCCI combustion was given. n-heptane/iso-octane was controlled real-time on a single-cylinder HCCI combustion engine. The test result shows that the equivalence ratio of n-heptane in mixture decides the HCCI ignition and controls the combustion phase of HCCI.

根据燃料设计的思想，提出了混合燃料比例实时优化的均质充量压缩着火燃烧控制新方法，并在HCCI单缸发动机上进行了HCCI异辛烷／正庚烷实时控制试验。

Experiments were carried out on a HCCI platform to evaluate the effects of cetane number and octane number on the HCCI combustion characteristics and emissions using n-heptane, RON25, RON50, RON75, RON90, and iso-octane.

进一步在发动机上对正庚烷、RON25、RON50、RON75、RON90和异辛烷在不同负荷下的HCCI燃烧特性和排放特性进行了试验研究。

Results showed that fat simulants n-hexane and isooctane can be used as a rapid compliance test.

结果表明：用正己烷和异辛烷作为脂肪食品模拟物时，可以大大缩短迁移试验时间。

The temperature accelerated the migration rate and affected on the distribution ratio of Irgafos 168 between HDPE film and fatty food simulants .

用反相高效液相色谱分析测定了不同温度下，正己烷、异辛烷和95%乙醇作为脂肪食品模拟物时，HDPE膜中Irgafos168的迁移量。

The results of n-octane and methylcyclohexane oxidations showed that the C-C bond in n-octane broke more easily than that in cyclohexane under reaction condition.

不同分子结构的烷烃氧化反应结果表明，正辛烷中的C-C键相比于环己烷中C-C键，更容易断裂。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷