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- radon gas concentration 氡气环境调查
- When radon gas emitted as springs, very quickly, a phenomenon opal. 当氡气随泉水喷出,速度很快,便出现乳白现象。
- The content of radon gas and methane bacteria indicates obvious abnormity above the gas pool. 气田上方氡气和甲烷菌的含量存在明显的异常。
- Indoor air pollutions caused by house decoration mainly include formaldehyde, benzene, ammonia and radon gas. 因装修引起的住宅室内空气污染主要包括甲醛污染、苯类污染、氨气污染和氡气污染。
- Family health is poor, over-decorated indoor toxic chemicals (such as formaldehyde, radon gas, etc.) exceeded. 家庭卫生差,过度装修使室内有毒化学物质(如甲醛、氡气等)超标。
- Radon gas in the environment, particles of the fire-resistant material asbestos and air pollution also increase the risk. 环境中的氡气、防火材料石棉的颗粒以及空气污染也会增大患肺癌的风险性。
- Through the gas absorption on the metal oxide surface, gas concentration change is measured. 通过气体吸附在金属氧化物半导体的表面,测定半导体电传导度的变化反映气体浓度。
- The elevated Gas concentration in patients with EGP could be correlated with Hp infection. 结论 Hp是EGP的重要致病因素之一 ,EGP患者Gas浓度升高与Hp感染有一定关系。
- The instrument can confect continuously the multiple gas concentration and can be adjusted continuously. 该系统可连续配制、并供给浓度值连续可调的多元混合标准气体。
- In the certain diffusion time the relation of gas concentration and diffusion depth is parabolic. 得出在一定的扩散时间内,气体浓度与扩散深度之间为抛物线关系;
- A nontraditional approach was attempted through the 1986 Radon Gas and Indoor Air Quality Act ,which directed the EPA to implement a public information and technical assistance program. 非传统的方法在1986年氡气和户内空气质量决议被尝试过,指示了环保局发布公共信息和技术协助计划。
- The gas concentration was finally inversed by further processing the DOAS of the gas. 进一步处理得到气体的差分吸收光谱,从而反演出气体浓度;
- Keywords radon gas survey;Rn concentration;annual effective dose; 氡气测量;氡活度浓度;年有效剂量;
- In the EGP group, the Gas concentration is related to the Hp infection, P<0.01. Conclusion Hp is one of the major causes for illness. EGP组Gas浓度与Hp感染情况有关 (P <0 .;0 1)。
- In the tracking-mode, the instrument generates an increasing or decreasing rate of beeps, depending on the gas concentration detected. 在检测模式下,仪器根据气体含量来增加和减少频率不同的嘟嘟声。
- The most obvious difference of gas concentration occurs at the places above and under the burner plane, along the gas flow direction. 喷嘴平面上、下气体组成差别很大,沿气流方向越靠近炉膛出口,这种差异越小。
- The optical analysis method of gas concentration has advantages of large measurement range,high precision,untouched on-line measurement and so on. 气体浓度光学分析方法具有测量范围宽、精度高、非接触在线测量等优点。
- Radon gas exploration geochemistry 氡气勘查地球化学
- An approximate formular to calculate the absorbing gas concentration profile from the radiation transfer equation and the transmissivity equation is derived. 推演得到由辐射传递方程和透过率方程求解吸收气体浓度分布的近似公式.
- An iterative solution of the radiation transfer equation for the temperature profile is established assuming a known absorbing gas concentration distribution. 建立了通过已知吸收气体浓密分布;由辐射传递方程反演温度分布的迭代法.