Structural effect of Ln~(3+) ions is characterized by atomic number (N).
用原子序数(N)代表镧系离子(Ln3+)大体结构效应的因素,并将N对镧系离子的16种理化性质(P)进行线性回归,回归方程均在0。
It is found that how the mass attenuation coefficients of two materials change are different even their atomic numbers are the same when the incident energies are different.
通过对单、双能量透射技术的比较分析发现由于入射能量的不同,相同原子序数物质的质量衰减系数的变化速度不同,即在双能量方式下,同一原子序数的物质对低能和高能X射线的吸收程度(线吸收系数)是不同的,这样通过低能、高能两个不同线吸收系数比较与运算,就可以从两种不同物质组成的、不同厚度产生的或相互重叠的图像中将不同种类的物体区分开。
A new parameter related to the effective atomic number is presented in the paper.
定义了与材料的有效原子序数相关的特征量,并结合基于最小错误率的贝叶斯决策,实现对材料组的分辨。
To classify different materials from the images by dual-energy X-ray transmission,the current method to calculate the Eigenvalue R relating to effective atomic number is combining the high-energy transmission signal with low-energy one.
双能量X射线图像系统使用将高能和低能透射信号相结合的方法(计算出与有效原子序数相关的特征值R)来识别物质,但物体的厚度对双能量透射图像的R值有很大影响。
Experimental result shows possibility of usage of LCIS op erating in dual energy mode in 5-10 MeV energy range for recognition of groups of materials according to their effective atomic number.
实验结果表明,在5-10MeV的能量范围内,大型集装箱检测系统利用双能X射线技术根据有效原子序数识别材料组是可行的。
Characterization of low-Z material layer profiles in bilayer structures by X-ray reflectivity measurement;
用X射线反射测量法表征双层结构中低原子序数材料的特性(英文)
Relation between ionization energy of isoelectronic atom & ion and atomic number;
等电子原子离子的电离能与原子序数的关系
any element having an atomic number greater than 92" (the atomic number of uranium); all are radioactive.
原子序数在以后（铀的原子序数）的元素，都是放射性元素。
Having an atomic number greater than92.
超铀的原子序数超过92的
"Helium: Chemical element, chemical symbol He, atomic number 2."
氦:化学元素,化学符号He,原子序数2。
Atom number eight is called oxygen.
原子序数为8的物质叫做氧。
any element of the lanthanide series (atomic numbers 57" through 71").
稀土属的任一种元素（原子序数至之间）。
The atomic number represents the number of nuclear protons or, in the undisturbed state, the number of extranuclear electrons.
原子序数表示原子核内质子的数目，也是在未被干扰的状态下核外的电子数。
They have the same atomic number and hence nearly identical chemical Behaviour But different atomic masses.
它们有相同的原子序数,因此化学行为几乎完全一样,但原子量不同。
All elements is a substance all of whose atoms have the same atomic number.
元素是其成分中所有原子的原子序数都相同的物质的总称。
The filter is constructed as a sandwich from three materials of different atomic number.
屏蔽物由不同原子序数的三种物质的夹层组成。
"Hydrogen: Lightest chemical element, chemical symbol H, atomic number 1."
氢:一种轻的化学元素,化学符号H,原子序数1。
The Research and Development of Low-Z Elements EDXRF Analyzer;
低原子序数元素能量色散X荧光仪的研制
Whether the Coordination Number Influence Dependence of Static First Hyperpolarizability on the Atomic Number of Alkali Metal
配体数与电子化物的一阶超极化率的碱金属原子序数依赖性
"In the 20th century, when the structure of atoms was understood, the table was seen to precisely reflect increasing order of atomic number."
20世纪,在了解原子结构后,周期表可精确地反映原子序数增加的顺序。
A type of atom specified by its atomic number, atomic mass, and energy state, such as carbon14.
核种由它的原子序数、原子量和能量状况具体确定的一种原子，如碳14
Any of two or more kinds of atoms having the same atomic mass but different atomic numbers.
同量异位素两种或各多种有相同原子质量但却有不同的原子序数的原子中的任一种
The electron range increases with decreasing atomic number and increasing incident beam energy E0.
电子射程随着原子序数的减少和入射束能量E0的增加而增加。
One of two or more atoms having the same atomic number but different mass numbers.
同位素两个或更多具有相同原子序数却具有不同的质量数的原子中的一个