radon need 中文意思是什麼
radon need
解釋
氡源-
A we have not found the need to carry out specific inspections on buildings completed in the past three years in hong kong to check if radioactive substances have been used in building construction. we have been conducting instead periodic surveys on the concentration of radon which, if allowed to accumulate, may pose health risks
一我們不認為有需要特別檢驗本港在過去三年落成的樓宇是否使用輻射性建築材料，但已不時測量本港樓宇的氡氣量，因為積聚的氡氣可能危及人體健康。 -
We have not found the need to carry out specific inspections on buildings completed in the past three years in hong kong to check if radioactive substances have been used in building construction. we have been conducting instead periodic surveys on the concentration of radon which, if allowed to accumulate, may pose health risks
（一）我們不認為有需要特別檢驗本港在過去三年落成的樓宇是否使用輻射性建築材料，但已不時測量本港樓宇的氡氣量，因為積聚的氡氣可能危及人體健康。 -
In this paper, a three - dimensional ( 3d ) program for the three - dimensional reactive flow fields of complicated geometric nozzle, which governed by the compressible full navier - stokes equations with realizable k - s turbulent model, has been upbuilt by using full implicit couple arithmetic and fvm ( finite volume method ) based on understanding and assimilation of a two - dimensional program group of cr ( chamber - radon ). the new program fulfils the urgent need of numerical tools for simulating three - dimensional reactive flow - fields of hylte ( hypersonic low temperature ) and other latest nozzles, for which cr is out of action in simulation, and can be applied to simulate other chemical laser system, such as chemical oxygen iodine laser ( coil ), overtone fluoride hydrogen, all - gas iodine laser, and so on. furthermore, some related topics about nozzles design and engineer ing also have been discussed
本文在二維cr （ chamber ? radon ）程序研究的基礎上，採用有限體積方法和完全隱式的耦合演算法，通過求解帶realizablek -兩方程湍流模型的多組分、有反應的三維完全納維埃?斯托克斯（ n ? s ）控制方程，建立了一套能夠對復雜形狀的三維噴管和光腔進行數值模擬的三維程序，解決了連續波df hf化學激光器增益發生器設計缺乏三維數值模擬工具的問題，並用該工具解決了cr程序無法實現的hylte等復雜三維噴管流場的理論模擬問題。
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