1) average concentration
平均浓度
1.
Basing on Chebyshev inequality and on the computation of average concentration of all related subsets, the authors put forward and proved the following lemma, theorem, and the four corollaries: [Lemma 1] There exists at least one of the sets of generalized prime-twins (namely one subset of the set of 2-primes group), which is an infinite set.
基于Chebyshev不等式以及对所有相关子集平均浓度的计算,提出并证明了下列引理、定理,以及4条推论:[引理1]至少有1个广义孪生素数集合(或称2素数组子集)是无限集合;[定理1]全部的或无限多的广义孪生素数集合是无限集合;[推论1]至少有1个3生素数集合(或称3素数组子集)是无限集合;[推论2]全部的或无限多的3生素数集合是无限集合;[推论3]普遍地说,至少有1个h生素数集合(或称h素数组子集)是无限集合(h是≥2的整数);[推论4]普遍地说,全部的或无限多的h生素数集合是无限集合(h是≥2的整数)。
2) daily average concentration
日平均浓度
1.
Calculating results are shown by an example to give the daily average concentration distribution to the ambient sensitive protection objects on the typical weather days.
结合高架点源影响浓度的实例计算,可以方便地得到典型气象日条件下大气污染物的日平均浓度分布以及周围环境保护敏感目标的日平均浓度影响值,能够更为真实地反映该地区的实际气象条件对大气污染物分布浓度的影响情况。
2.
(Calculating) results of an example show that the daily average concentration distribution of air pollutants to some ambient sensitive (protection) objects on typical weather days is obtained easily.
结合高架点源影响浓度的实例计算,可以方便地得到典型气象日条件下大气污染物的日平均浓度分布情况,能够更为真实地反映该地区的实际气象条件对大气污染物分布浓度的影响情况。
3) mean annual concentration
年平均浓度
4) event mean concentrations(EMCs)
事件平均浓度
1.
Discharge processes of runoff pollutants during rain events and relationships of the processes with rainfall characters were discussed,and event mean concentrations(EMCs) were calculated.
据此分析了径流污染物浓度的变化规律及其与降雨特性之间的关系,计算了地表径流水质的事件平均浓度,分析了事件平均浓度的分布规律及其与降雨特性参数之间的相关关系。
2.
The median event mean concentrations(EMCs)of COD,SS,NH3-N,TN and TP are 119 mg/L,188 mg/L,2.
结果表明,该工业区降雨径流水质较差,COD、SS、NH3-N、TN和TP的事件平均浓度(EMC)中值分别达到了119、188、2。
5) EMC
事件平均浓度
1.
Character of combined sewer overflow from watershed SA in Shanghai was studied,and the correlation of influence factors to the EMCs of overflows was discussed.
结果表明,该区域雨天溢流COD、BOD、SS、NH3-N、TN、TP事件平均浓度的均值分别为614mg/L、208。
2.
Based on monitoring the runoff water quality on the surface of free-way besides LuKou,which lead to NanJing aerodrome,the variations,Even Mean Concentrations(EMCs) and the impact factors of pollutants concentrations were analyzed.
在对南京机场高速公路禄口高架桥降雨径流水质进行监测的基础上,探讨了高速公路路面雨水径流污染物的出流规律、径流中污染物的事件平均浓度(EMC)及其影响因素。
6) Average pollutant concentration
污染物平均浓度
补充资料：对数平均浓度差
分子式：
CAS号：
性质：指传质过程中两端点(传质设备前后)浓度差ΔCa、ΔCb的对数平均值ΔClm=。当平衡线及操作线均可视为直线、总传质系数可取为常数时，△Clm即为传质过程的平均推动力。
CAS号：
性质：指传质过程中两端点(传质设备前后)浓度差ΔCa、ΔCb的对数平均值ΔClm=。当平衡线及操作线均可视为直线、总传质系数可取为常数时，△Clm即为传质过程的平均推动力。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条