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When the equivalence ratio of the premixed flow is exactly stoichiometric, the combustion temperature reaches the highest. 预混气流的当量比为化学恰当比时，燃烧温度最高；
The system can easily change coflow temperature, oxygen mole fraction and turbulence parameters by changing the coflow mixture equivalence ratio. 该试验装置利用氢气／空气预混合气的高温产物来形成可控活化热氛围，能方便地通过改变协流当量比而改变协流的热氛围、氧氛围和湍流场。
The experimental results showed that, when cyclic hydrogen remains constant, mixture equivalence ratio can be adjusted by the change of EGR rate. 实验表明：在循环喷氢量不变时，可以通过调节EGR率改变混合气的当量燃空比。
The test result shows that the equivalence ratio of n-heptane in mixture decides the HCCI ignition and controls the combustion phase of HCCI. 结果表明：混合燃料HCCI着火以及燃烧相位主要取决于正庚烷实际的燃空当量比；
Experimental results showed that a "U" shape curve existed between the critical initiation energy and IPN equivalence ratio. 实验结果证明了 IPN的临界起爆能与燃料当量比成“U”形曲线关系 ;
On this basis it makes some study on the combustion process of hydrogen-fueled IC engine by changing the ignition advance angle and equivalence ratio of the model. 在此基础上,进行了点火提前角和燃空当量比对氢内燃机燃烧过程的影响研究,为合理组织氢内燃机的燃烧过程研究提供了依据。
Influences of operating parameters, e.g. intake temperature and pressure, compression ratio, equivalence ratio on the performance of the PM engine were discussed. 着重讨论了进气温度和压强、压缩比、过量空气系数等参数对多孔介质发动机性能的影响。
The effect of equivalence ratio on the gas composition, calorific value , gasification efficiency, gas production yield and charcoal production output is studied. 通过调节空气的流量,研究了当量比+对产气组成、气体热值、气化效率、气体产量和木炭产量的影响。
It also shows the F/A equivalent ratio and ignition advanced angle should be adjusted to optimum when test with EGR. 试验结果还表明，进行EGR时的燃空当量比和点火提前角等参数也需要进行相应的调整和优化。
For every combination, five experiments with different fuel injection arrangement were carried out, and every experiment was actualized with three equivalence ratios by adjusting a throttling venture. 采用正交试验设计方法组织燃烧室形面调节，每个形面进行5种喷注位置的试验，每次试验通过文氏管调节燃料流量实现3个当量比的燃烧室工况。
The results showed that land equivalent ratio (LER), biomass and N/P content of crops significantly increased in the maize/soybean intercropping system. 结果表明，玉米与大豆间作具有明显的间作优势，间作作物的生物量、氮磷含量都显著好于单作。
On the basis of land equivalent ratio of inter cropping and mixed cropping the theory and method of quantitative evaluation of inter-cropping and mixed cropping were discussed in this paper. 在剖析间混作土地当量比的基础上，本文针对间混作群体的特点，对间混作效果定量评价的理论与方法进行了研究，提出了间混作当量的概念、计算公式，对其应用范围及内涵进行了讨论。
The ratio of students to teachers is 35:1. 学生和老师的比率是三十五比一。
The ratio of schoolboys to schoolgirls is 2 to 1. 男学生和女学生的比例是2比1。
Men outnumber women here in the ratio of three to one. 此地男子数量以三比一超过女子。
The first or last term of a ratio or a series. 首项，末项比率或数列中第一个或最后一个项
Smooth Maps and the Notion of Equivalence. 光滑映射和等价的概念。
College diplom in business or equivalence. 专科以上或同等学历。
The second, we show the equivalence of P3 and S3. 其次证明模态系统P3和严格蕴涵系统S3等价.
After-tax profit margin is the ratio of net income to net sales. 税後利润率指净收入与净销售之比。