order number; ordination number

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)