查询词典 observational

Note that Hipparchus used geometry and trigonometry to change astronomy from a set of unrelated observations to a precise observational science.

我们必须注意到是Hipparchus首先利用几何学及三角学，把天文学从一大堆杂乱无章的数据资料，转化成一门精确的观测科学，而托密勒则创建了太阳系的地心说。

The consequence of that mistake, as John Ioannidis of the University of Ioannina School of Medicine, in Greece, explained to the meeting, is that a lot of observational health studies—those that go trawling through databases, rather than relying on controlled experiments—cannot be reproduced by other researchers.

希腊约阿尼纳大学医学院的约翰。阿尼得士（John？？Ioannidis）在会上解释说这种误差的后果是诸多同类实验不能在其它实验室里得到复制，原因鉴于综合观测健康研究就像鱼网一样滤过资料，而没有依赖可控的对比试验病例。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。