From volumetric method to isotope dilution method, K Ar dating has got its period of maturity. But traditional K Ar dating techniques could not overcome the errors coming from the influence of isotope mass discrimination. KAr法定年技术经历了体积法和稀释法等不断趋于成熟,但对于年轻火山岩进行定年时,由于同位素质量分馏的影响,上述方法都具有不可克服的缺陷。
It is experimentally proved that the sensitivity of QMS in this mode is increased further, particularly the effects of overcoming mass discrimination and contamination resistance are evident. 实验证明该模式使灵敏度得到进一步提高,特别在克服质量岐视效应、抗污染方面效果显著。
Problems encountered in mass discrimination correction were discussed. 讨论了质量歧视效应校正中的有关问题。
And also discuss the effect of matrix, solvent, cation-ization salt, and sample preparation technique, critical factors on the experiment results and the cause of mass discrimination. 详细分析了基质、溶剂、盐(阳离子)和样品制样方法等关键因素对实验结果的影响及造成质量歧视的原因;
Mass media go on constant concern and support the vulnerable groups, but during the process of paying close attention to and support, manifest some weak points such as ignore, discrimination, the distorted phenomenon etc. 大众传媒对弱势群体在进行着不断的关注和扶持,但在关注与扶持的过程中,也显露出一些诸如忽视、歧视、失真现象等不足之处。
There have been fruitful research results in the area of discrimination. Based on mass of data, economists have conducted deep study on the discrimination existing in labor market using econometrics and statistical method. 对歧视的研究已经形成了大量的成果,经济学家使用大量数据、利用计量经济学和统计方法对劳动力市场中的歧视也进行了深入研究。
Points out that the mass media and interpersonal communication is a discrimination in two main route of transmission. 指出大众传媒和人际传播是歧视的两种主要传播途径。