查询词典 radon

Scientists believe that exposure to radon plays a major role in lung cancer in nonsmokers.

科学家发现暴露在氡气中是不吸烟者患肺癌的重大原因。

Secondly,the method rectifies rescanned image from the presswork by using Radon transformation and the embedded watermark in it is detected.

再利用Radon变换对由扫描印刷品所获得的图像进行矫正，并从图像中提取嵌入的水印信息

The method first embeds watermark into the geometric invariant Fourier-Mellin domain of an image to weaken the geometric distortion, brought by printing process, of the watermark in presswork, and the image is then used to create presswork via a legal printing process. Secondly, the method rectifies rescanned image from the presswork by using Radon transformation and the embedded watermark in it is detected. Since there is an obvious difference between the destruction degrees of the watermark caused respectively by legal and pirated printing process, we can judge whether a copy of presswork is valid or not just by computing the ratio of the successfully derived watermark and comparing it with a predefined threshold.

该方法先将水印嵌入到具有几何不变性的Fourier-Mellin域中，以削弱正版印刷过程中的几何失真对水印的破坏；再利用Radon变换对由扫描印刷品所获得的图像进行矫正，并从图像中提取嵌入的水印信息；由于正版和盗版印刷过程对水印的破坏程度区别明显，该方法最终通过计算水印提取的正确率来度量这种破坏，并将其与预先制定的阈值进行比较来判定印刷品的正伪。

This earthquake occurred at edge of 2003 year seismically risk zone. In this paper, on the basis of main evidence of the year risk zone and anomaly tracking, the authors analyzed the precursory anomalies including groundwater level of Dadianzi well and Kulun; water radon of Kailu well before MS5. 9 earthquake. At the same time, the authors also analyzed and studied the precursory anomalies around Inner Mongolia region. The ...

根据年度危险区的确定、前兆异常跟踪及其主要依据，分析了这次5.9级地震前大甸子井、库伦井地下水位、开鲁井水氡等前兆异常，在此基础上，对内蒙古附近区域的前兆异常也进行了分析和探讨，表明该次地震前在内蒙古及附近区域出现了一组中期、短期前兆异常及宏观异常，文中还研究了该区域前兆异常的演化过程。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48