利用对比剂首次通过法可进行MR肺灌注成像。
The MR pulmonary perfusion imaging was achieved by the first-pass contrast agent method.
通过分析当前在心理系统中应用层次分析法存在的问题，首次提出了应用层次分析法来为心理系统建立最优心理结构的设想。
Pointing out problems in the application of AHP in the psychic system, and exploring the feasible way of establishing the best psychic structure by AHP for the first time.
首次在有限视场的输入景物下通过移动刀刃法对扫描成像过程中垂直扫描方向系统像方MTF的检测进行了分析和模拟计算。
Under the input scenery with finite visual field, the analyses and simulative calculation of the image side OTF of vertical direction of the scanning image by moving blade have been done firstly.
他评论称，通过历史类推法，过去发生于人类两个群体之间的“首次接触”事件，比如欧洲探险者和美洲原住民，并非以彼此的和平相处而著名的。
He remarked, by way of historical analogy, that past "first-contact" incidents between groups of humans, such as European explorers and native Americans, were not usually noted for their peaceability.
利用相关分析法识别水淹层：首次提出了利用相关分析方法进行水淹层识别，通过提取油层、水层、水淹层测井响应之间的综合相关系数来识别储层类型的方法。
In this method, correlation coefficient of various kinds of layers such as oil layer, water layer and water flooded layer are qualified to distinguish which kind of layer it belongs to.
本文确立了承灾体脆弱性评价指标体系原则和评价体系的结构，并通过反推法、信息量法等多种方法首次建立了承灾体脆弱性评价指标体系。
This paper established the principles and the structure of vulnerable-evaluation index system, and set up the evaluation-index system based on the several ways.
本文确立了承灾体脆弱性评价指标体系原则和评价体系的结构，并通过反推法、信息量法等多种方法首次建立了承灾体脆弱性评价指标体系。
This paper established the principles and the structure of vulnerable-evaluation index system, and set up the evaluation-index system based on the several ways.
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