| 1. | We continuously inject a tracer into a point in a steadily moving fluid .
我们连续地将一种示踪物注入某稳定运动流体中之一点。 |
| 2. | Concentration of tracer
示踪物浓度 |
| 3. | Measurement of liquid flow in open channels - dilution methods - methods of measurement using radioactive tracers
明渠流量测量.第2部分:稀释法.第2b节:放射性示踪物测量方法 |
| 4. | Measurement of gas flow in conduits . tracer methods . part 4 : transit time method using radioactive tracers
密封管道中气体流量的测定.示踪法.第4部分：放射性示踪物的过渡时间法 |
| 5. | Measurement of water flow in closed conduits . tracer methods - par vi : transit time method using non - radioactive tracers
密封管道中水流量的测定.示踪法.第6部分：非放射性示踪物的转移时间法 |
| 6. | Measurement of water flow in closed conduits . tracer methods part ii : constant rate injection method using non - radioactive tracers
密封管道中水流量的测定.示踪法.第2部分：使用非放射性示踪物的恒速率喷射法 |
| 7. | On fluorescence emission strength of the complex was studied . the reaction of dtpaa with pas - na can give dtpa - pas and dtpa - 2pas . their tb
离子等对三元配合物荧光性质的影响，并且探索了用三元配合物作为荧光免疫标记示踪物的可能性。 |
| 8. | Considering the practical requirement in scientific research and adopting the tracing method for ree distribution patterns the authors earned out a systematic research on the distribution patterns of ree in soils of alluvial plain
摘要根据科研生产工作的实际需要，借鉴稀土元素分布模式示踪物源的方法，对冲积平原景观区土壤中稀土元素的分布模式进行了系统研究。 |
| 9. | Spatial distribution and time scales of atmospheric diffusion over beijing area are revealed by means of a random walk simulation model and practical meteorological data with a specified emission source from the city . results show a southward transport pattern for wintertime while a northwest transport of pollutants in summer . the area is the least evidently influenced by the emission source in spring , while the largest in autumn . the time spent for instantly emitted material removing from the model domain varies from winter - spring to summer - autumn . the former was shorter one of less than 20 hours ; the latter was longer one of approximately 30 hours . distribution of occurrence probability for different removal times was not symmetry . reducing slowly at the end of longer removal time , probability exists for pollutants remaining in this area a long time
结果表明，冬季示踪物偏南夏季偏西北的输送明显春季扩散影响范围最小秋季最大。示踪物从200km200km模式区域输出的平均时间去除时间明显分为冬春季和夏秋季两组，前者较小，平均在20h以下，后者较大，平均约30h 。不同去除时间出现的频率分布是非对称的，在长去除时间一侧，出现频率下降缓慢，显示污染物有在该区域内长时间滞留的可能。 |
