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The advantage of the proposed method is that the elastic moduli of hardened cement paste are related to the volume fractions and elastic moduli of the constituents in a quantitative manner, which lays a theoretical foundation for optimization design of cement paste.

分级模拟方法的优点在于以定量的方式将硬化水泥石弹性模量与各组分的体积分数和弹性模量联系起来，为硬化水泥石优化设计提供了理论依据。

The neutral/basic fraction was furthermore separated into 4 fractions using silica gel normal phase chromatography, and each fraction was then concentrated and analyzed using gas chromatography-mass spectrometry. In comparison with the pure standards and the retention indices reported in the literature, a total of 302 volatile compounds were identified in Changyu XO brandy, including 30 alcohols, 35 aldehydes and ketones, 20 carboxylic acids, 104 esters, 24 substituted benzenes and derivatives, 14 phenolic derivatives, 14 acetals, 16 furan derivatives, 22 terpenic and norisoprenoidic derivatives and 23 others.

实验先采用液-液萃取方法提取张裕XO级白兰地的挥发性成分，然后将酸性成分与碱性和中性成分分离，再采用柱色谱分离手段将其分离为若干个级分并浓缩，采用气相色谱-质谱、标准品比对、保留指数值比较等方法对分离得到的各级分中的成分进行了鉴定，在白兰地中共鉴定出302种挥发性成分，包括醇30种、醛酮类35种、酸类20种、酯类104种、苯同系物及其衍生物24种、酚类14种、缩醛14种、呋喃类16种、萜烯类22种和其他物质23种。

The experiments for determining the reaction kinetics of Daqing atmospheric residue were performed in a continuous flow, expanded bed rector. Four-lumped reaction kinetic model was developed to account for various feed and product fractions of Daqing atmospheric residue (gases, gas oil, residue and coke). The amounts of olefins and alkyls in the gas products were further analyzed to determine reaction kinetics of gas product distributions. Hence, a combined five-lumped reaction kinetic model was obtained for catalytic pyrolysis of Daqing atmospheric residue. The kinetic constants both in four-lump model and five-lump model were evaluated. A simulator for catalytic pyrolysis process was developed by incorporating the five-lumped kinetic model into the hydrodynamic flow model.

其次利用改进的固定流化床装置考察大庆常压渣油催化裂解反应规律，筛选反应工艺参数；分析了催化裂解工艺存在的主要化学反应类型，提出了渣油一次反应和二次反应网络图；将反应原料油作为单独集总组分，而将产品中的轻质油、气体、焦炭分别作为集总，从而建立了四集总动力学模型；在此基础上，把气体产物中的目的产物低碳烯烃独立划分，得到五集总动力学模型；采用最小二乘法分析实验数据，分别得到四集总动力学模型和五集总动力学模型中各集总间相互反应转化的反应速率常数。

However the different alkali metal azides RN3 show different reactivity with β-MNCl, and the properties of the products such as superconducting fractions, the lattice constant, and stability against thermal or air, are very dependent on the kinds of alkali metals used.

但是，不同的碱金属叠氮化物具有不同的可反应性，其反应产物也具有不同的性质，例如超导体积百分率、晶格常数、热稳定性和在空气中的稳定性等都和碱金属离子有关。

Keeping baryon density invariant, the fractions of hyperons at S = 2 are largerthan those at S = 1 in the region of relative low density of baryons.

给定重子密度，中子在S=2时的组分比S=1时的小，而质子、电子、μ子在S=2时的组分比S=1时的大，特别是在低密度区域。S是每个重子的熵。

In general, biogenic silica was apt to accumulate in the fine fractions of sediments rich in organic matter.

此外，底栖硅藻可能是潮滩沉积物中BSi的重要来源，但是底栖硅藻作为BSi来源的相对重要程度存在明显的空间差异。

To avoid the forming of cracks in iron based laser cladding, the volume fractions of austenite and cemetite in cladding layers were adjusted through adjusting the contents of Ni. The claddings were produced on gray irons without preheating.

采用铁基熔敷材料，在不预热情况下通过调整熔敷金属Ni含量，改变铸铁激光熔敷层内奥氏体相与渗碳体相体积分数，进而抑制熔敷层裂纹的产生。

In these and other edit boxes, you can type decimals or fractions or expressions.

在编辑框中你可以使用十进制数据类型或分数或表达式。

Furthermore, they had a whole system worked out for fractions, decimals, equations, and everything else.

此外，他们甚至有一套代表分数、小数、公式和任何其他东西的系统。

Furthermore, they had a ‵whole system worked out for fractions, decimals, equations, and everything else.

更有趣的是，他们竟然还为分数、小数、方程式等都配了特殊的密码。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。