查询词典 sampling fraction

Refractive index is one of fundamental physical constant, which is often related to concentration, temperature, void fraction, internal strain etc.

折射率是一个基本物理量，通过它可以跟浓度、温度、空穴率、内应力等联系起来，因此折射率的测量很重要。

C〓 alkylthiophene from aromatic fraction of pyrolysates at 200℃ probably originated from the combination of phytol group of chlorophyll and organic surphur of algal cells.

盘星藻200℃热解产物芳烃组分中的C〓烷基噻吩可能是来源于叶绿素类的植醇基与来源于藻类体内的有机硫结合而形成。

The mass fraction of isocyanurate was calculated by piperidine method.

采用六氢吡啶法测出了异氰腺酸酯的质量分数。

It was found that coal tar pitch could not be used as-received to prepare useful carbon foams because of their higher quinoline insoluble fraction.

结果发现，由于煤焦油沥青不含中间相，且QI含量较高，导致在实验条件下不能直接制备出合格的炭泡沫。

Such observation of relativistic effects requires measurements of changes of planetary motion amounting to a fraction of an angular second per year.

这样的相对论效应的观察需要能测量出行星每年总共只有百分之几弧秒的改变。

The relation of volume fraction of plasticizer in coating film with the mechanical property was investigated.

研究了涂层中增塑剂体积分数与涂层力学性能的关系。

In order to investigate the effect of operating variabls on the yield of aromatics,a certain fraction of a straight run gasoline containing 48.4%naphthenes was catalytically converted into aromatics over a bed of 100 ml 14—20 mesh,granular,platforming catalyst under various opera- ting conditions.

用直馏汽油的某一馏分在装有100毫升14—20筛眼颗粒形铂重整催化剂的反应设备中，进行单程纯氢操作的铂重整反应条件试验以考察芳烃的生成与反应条件变化的关系。

The angular extent in a specified plane which contains all the radius vectors of the polar curve of luminous intensity having lengths greater than a specified fraction of the maximum.

在某一平面上，一定角宽范围内所包含的光强极轴曲线上的矢径长度均大于其最大值的某一特定比例，这种情况定义为光束的发散。

The temperature effect on the oil yield was discussed at first. Then, analytical work was carried out as follows: the ultimate analysis and physi-chemical analysis of the pyrolytic oil comprised a sketch of the fuel properties of the oil; Then, through the distillation analysis of the oil, the fraction composition of the "unrefined"oil was known. After that, a general knowledge of the aromaticity and saturation of the hydrocarbons in the oil was provided by the outcome of the FT-IR functional group analysis. Also, from the analysis, the form of the polar functional groups and their distribution in different fractions of the oil were learned.

文中首先对不同热解温度下热解油产率进行分析讨论，然后，针对热解油品质进行了一系列分析：通过元素组成和理化特性的分析，对热解油作为燃料特性有了一个大致了解；通过实沸点蒸馏分析，得到热解油作为一种未提炼油的馏分分布，并为后续热解油馏分的细入分析提供了前提；通过对热解全油和各窄馏分的FT-IR官能团分析，对热解油的芳香性、不饱和性有了整体的了解，并且清楚了热解油中的极性官能团存在型式及其在热解油不同馏分中的分布。

The paper available mapping of integral coefficient polynomial and rational number, obtain factorization from factorization of polynomial by the way of sieve in true fraction series.

利用整系数多项式与正有理数的对应，将多项式因式分解通过对真分数序列筛选的办法求得因式，给出了整系数多项式因式分解的一种新方法。

Objective:To compare the response control and attention of Schizophrenic patients with that of the healthy controls by Integrated Visual and Auditorycontinuous performance test. To quantitate the impairment of cognitive function in patients, and to explore the relationship between cognitive function and the severity of the disorder.

目的：探讨精神分裂症病人在IVA持续操作测试中的反应控制能力、注意力等，并与健康人进行比较，从而量化精神分裂症病人的认知功能损害，并进一步探讨其认知功能与疾病严重程度的关系。

Main effective factors including subcooling degree, mechanical vibration, gas hydrate reformation, environment temperature, noncondensing gas and surfactant are analyzed.

指出过冷度、机械振动、重复生成水合物、环境温度、不凝性气体、添加剂是影响气体水合物生成的主要因素，还对R152a水合物的放冷进行了实验研究。