查询词典 radon

It is calculated according as the quantity of air molecules ionized by the alpha rays decayed by radon and its progeny as the air is inhaled to the ionization chamber by the air pump.

采用的测量原理是通过气泵把空气吸入电离室内，通过测量氡及其子体衰变放出α射线使空气分子电离的量来间接测量空气中的氡浓度。

Then angular motion compensation and Radon transformation are performed to the ISAR image. A novel search algorithm based on the edge detection is used to divide the target from the sea clutter in the end.

利用ISAR技术得到回波二维像，差波束补偿之后，对其进行Radon变换，再利用该文提出的结合边缘检测技术的搜索算法得到的参数，完成目标与海杂波分离处理。

MIA said earlier this month:"We fear it is no coincidence that Cambria and Silestone both issued advertisements and announcements in the last week that their products are certified to be radon-free – just as the public furore over this issue boiled over."

美国大理石协会在这个月早些时候说："石英制造商在上个星期发布的广告和宣言，宣称它们的产品完全没有氡辐射。显然在这个敏感时候，发布这个宣言我们觉得并不是巧合。"

Investigation ; Radon Concentration ; Track Detector ; Cinder Brick Building

调查；氡浓度；固体径迹探测器；煤渣砖建筑物

Based on the analysis of the shadow zone and the padding methods of the Radon domain generated by circular cone-beam CT scanning, this paper proposes a shadow zone padding method by distance-weighted interpolation.

通过分析圆轨迹锥束CT(cone-beam CT，简称CBCT)扫描Radon域的数据缺失问题，比较了前人提出的Radon阴影区域数据缺失填充方法的特点，提出了一种基于距离权重变量的阴影区域填充方法。

However, because of the limitation by circular orbit, we can't obtain all the data in Radon Space which means that the result becomes better with the cone angle decreases. So it is important to study the relationship between the cone angle and the reconstruct quality further.

但是由于圆轨道几何结构的限制，使其不能够得到完备的锥束重建数据，只有在锥角较小的情况下才能得到，因此深入研究Radon空间的数据缺失与锥角的关系以改进算法。

Seismicity trend before the earthquake was forecasted according to seismicity feature and commensurable characteristics of strong earthquake activities of Sichuan and Yunnan areas.Since Oct., 1995, a lot of kinds of the anomalies with large amplitude, such as radon and CO2 contents in groundwater and groundwater level etc.synchronized in a wide range of western Yunnan, especially along Zhongdian—Nanjian seismic area. The characteristics of these short-term anomalies are introduced and analysed.

根据川滇地区地震活动特征和可公度性计算结果，在该次地震前对地震大形势进行了预测。1995年10月以后，滇西北地区出现了大面积、大幅度、多手段的同步异常，其中以水氡、水位和CO2异常为主，沿中甸─南涧地震区分布较为集中。

Convex body; star body; cross i-section; Firey projection; Radon transform; Fourier transform of distribution; generalized intersection body; dual mixed volume; embedding in L_p

基础科学，数学，几何、拓扑凸体；星体； i-维中心截面； Radon变换；分布的Fourier变换；广义截面体；对偶混合体积；等距嵌入L_p

Radon gas is a natural, chemically inert gas that is a natural decay product of uranium.

氡气是一种天然、化学惰性气体衰变产物，是一种天然铀。

In Chapter 2, we mainly study the exact inversion and approximate inversion of the exponential Radon transform, and obtain the Sobolev analytic results; for convenience of practical calculation, we establish the another form of reconstruction formula through harmonic decomposition.

第二章我们主要讨论平面上的指数型Radon变换的精确反演和近似反演，得到了它们的有关Sobolev分析结果；为了实际计算的方便，我们用调和分解法作了进一步讨论，得到了重构公式的另一种表达形式。

In contrast to the ubiquitous rising-sun-with-rays military flag of the Japanese, Chinese banners and ensigns feature a range of designs.

与遍地都是的太阳军旗不同，中国人的旗帜和徽章设计得各式各样。

From their small corner of Feng's Guangzhou headquarters -- a jumble of pink leashes, squeezable rubber steaks, and plastic doggy Santas for Fido's stocking -- Soleil's designers come up with at least five new products a month.

从Feng 设在广州总部的产品展示柜台上可以看到，Soleil的设计师每月至少设计出5件新产品。