分数

It's completely different from integral number not only the meaning but also the form as well.Fraction is more difficult and abstract content than other content in primary school Maths course.

无论在意义和写法上，与整数都有很大差异，分数的初步认识，是小学数学教学中比较抽象，较难理解的内容。

It has been estimated that roughly half the variation in intelligence test scores is caused by hereditary influences.

据估计，在智能测验分数中约有半数的变化是由于遗传的影响。

The results showed that the mass fractions of Fe and Ni in the coating were 61.8%-62.1% and 37.9%-38.1%, respectively, similar to those of invar alloy, and the coating was solely composed of nanocrystalline γ solid solution.

验证性实验结果表明，制备的镀层具有与因瓦合金相似的成分，其Fe和Ni质量分数分别为61.8%~62.1%和37.9%~38.1%，它是由单一的纳米晶γ固溶体组成。

The kernel requarment for the rotating invariant property of a TFD based on fractional Fourier transform is proposed and proved in chapter 5. A close formula of Radon-Wigner transform of LFM signalis given. Based on the formula, the distribution of RWT is discussed.

第五章在首先简单介绍分数阶付立叶变换的基础上，提出并证明时—频分布具有旋转不变性对核函数的要求，给出了Radon-Wigner变换在直角坐标系下分布的一个显式公式，据此讨论了RWT分布特点。

It is found that the coexisting curves of the temperatures versus the volume fractions of water, cyclohexane and diethylene glycol monobutyl ether are respectively inverse "S" type curve, positive "S" type curve and "knot-shape" curve.

用改进的相体积法测定了水－环己烷－二乙二醇丁醚三元体系的相平衡，给出了不同温度下平衡共存三液相的体积分数及平衡共存三液相的相密度的共存曲线。

The electrochemical properties of the corrosion of 430 ferrite stainless steel with different RE contents in the 3.5wt% NaC1 solution were studied by means of EIS (electrochemistry impedance spectroscopy). And the characteristics of textural component were quantitatively analyzed by the orientation distribution functions and inverse pole figure.

通过电化学阻抗谱研究了不同稀土含量430铁素体不锈钢在质量分数为3.5%中性氯化钠溶液中的腐蚀电化学特征，通过ODF分析和反极图定量计算研究了含稀土430铁素体不锈钢中织构组分特征。

In chapter 3,we study several kinds of fractional differentiabli-ties,and prove the inverse function theorems and Whitney extendedtheorems concerned to them.

第三章研究几种分数可微性，并证明了与它们相关的反函数定理以及Whitney扩张定理

In §1. 2, we gave the definition of the Riemann-Liouville operators of the fractional calculus and the basic properties of these operators. In§1. 3, we introduced the definition of the generalized Mittag- Leffler function E〓 and proved the inverse Laplace transform formula below,〓(1) which was used frequently in this paper.

在§1.2节中，主要介绍了Riemann-Liouville型分数阶微积分算子的基本定义以及主要性质，在§1.3节中则给出了广义Mittag-Leffler函数〓的定义及其基本性质，同时证明了如下Laplace逆变换公式：〓在本文中，公式（1）将被多次引用。

In the solution of the equation, there will be scores, involution, brackets, and so on.

在解方程中，会出现分数、乘方、括号等情况。

The main content of this paper as follows: The acidic strength, reaction temperature, reaction time of Chlorine-aluminate Ionic Liquids with different structure of cation on the activity of transalkylation of MN with TeMB and the selectivity of 2,6-DMN were studied. The optimum reaction condition was obtained: the molar fraction of AlCl_3 is 0.71, molar ratio of 2-MN and TeMB is 1, the amount of ionic liquid is 32wt%, reaction temperature is 20℃and reaction time is 8h using X-xAlCl_3 and X-xAlCl_3 as catalysts; the optimum reaction time is shortened 6h using Et_3NHCl-xAlCl_3 as catalyst.

本文主要研究了以下内容：分别考察了不同阳离子结构的氯铝酸盐类离子液体的酸强度、反应温度、反应时间等因素对MN和TeMB转移烷基化的催化反应活性和2，6-DMN选择性的影响，优化得到适宜的反应条件为：以X-xAlCl_3和X-xAlCl_3为催化剂时，AlCl_3的摩尔分数x=0.71，2-MN和TeMB摩尔比为1∶1，离子液体用量为32wt％，反应温度为20℃，反应时间为8h；以Et_3NHCl-xAlCl_3为催化剂时，反应时间缩短到6h。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。