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您的检索式：关键字=Fine particulate matter
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| 1 | 卫星遥感监测近地表细颗粒物多元回归方法研究显示文摘对地基监测PM2.5和气象数据、MODISAOD卫星数据与NCEP FNL数据进行了处理分析,在与一元简单线性模型(模型1)进行对比的基础上,建立了适应于北京及其附近地区遥感监测近地面颗粒物(PM2.5)浓度的多元线性(模型2)和非线性(模型3)回归模型,并对模型进行了评价验证和遥感监测初步应用.结果表明:模型1,2,3分别能够解释PM2.5 32.5%,56.1%,62.7%的变异.反演的PM2.5浓度与站点监测值相关性分别为0.5488(R2=0.3012),0.7449(R2=0.5549),0.7431(R2=0.5523).对于站点监测PM2.5浓度63.1652μg/m3的均值,反演均方根误差RMSE分别为43.5562,35.3321,36.8450μg/m3.模型2和3中气象因子分别能够解释PM2.5 23.6%和12.6%的变异,说明了气象因子影响北京地区春季PM2.5-AOD关系的显著性.3种模型整体上都不同程度地存在着低值高估和高值低估的现象. | 贾松林 苏林 陶金花 王子峰 陈良富 尚华哲 | 2014 | 中国环境科学2014，34，3： | 21 |
| 2 | 水泥窑PM_(2.5)排放特性及其PAHs风险分析显示文摘采用荷电低压颗粒物撞击器(ELPI)、便携式PM2.5采样器和稀释系统,对国内3家新型干法水泥生产厂(5条生产线)的水泥窑(包括窑头和窑尾)进行现场采样,分析水泥窑排放PM2.5的质量浓度、粒数浓度及其中的多环芳烃(PAHs)浓度,对呼吸致癌风险进行评价.结果表明:从粒数浓度分析,PM2.5中70%以上为PM0.33,这部分颗粒物主要是由气化凝结形成的.各采样点排放的PAHs主要以二环和三环的低环PAHs为主.第3个水泥厂窑头排放的PAHs含量最高,而且苯并[a]芘(BaP)超过国家所规定的8ng/m3标准限值,同时其呼吸致癌风险水平为4.46×10-4,高于可接受致癌风险水平的上限,需要有效处理. | 韦琳 唐海龙 郭盈盈 邹正禹 刘阳生 | 2014 | 中国环境科学2014，34，5： | 9 |
| 3 | Numerical simulation of coal-fired particulate agglomeration under the action of gas-liquid two-phase jet显示文摘Because the conditions of agglomeration experiment have more influence and the operation is complex, the numerical simulation research has more advantages. Using the combination of PBM and DPM in fluent, numerical simulation of coal-fired particulate reunification was carried out. The results show that the jet effect will introduce the vortex in the agglomeration room to form the turbulence region, and the double jet will make the turbulence area larger and provide stronger turbulence pulsation. The introduction of water vapor jet can increase the adhesion between particles while strengthening turbulence, and better promote the agglomeration of fine particles. | Zhu Hongtang | 2019 | 科技经济导刊2019，，24： | 0 |
| 4 | Effects of the ambient fine particulate matter(PM2.5) exposure on urinary metabolic profiles in rats using UPLC-Q-TOF-MS显示文摘In order to study the damage of ambient fine particulate matter(PM2.5) to organism in the environment,the method of urinary metabolomics was used to detect the potential endogenous metabolites and their related metabolic pathways to clarify the toxicity mechanisms. Particles of PM2.5 collected from the fibrous membrane were extracted ultrasonically and dissolved in physiological saline to prepare PM2.5 suspension. The solution of saline and fine particular matter was injected into the trachea of rats respectively. The rats were injected two times a week for four weeks. Samples of 24-h urine were collected at the 14 th day after the end of exposure, and the ultra performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry(UPLC-Q-TOF-MS) was used for the metabolomics detection. Principal component analysis(PCA) was used to investigate the global metabolomic alterations and a clear separation in the scatter diagram were observed. 17 potential endogenous metablites were identified from urinary samples in rats by UPLC-Q-TOF-MS. The primary metabolism pathways involved pentose and glucuronate interconversions, starch and sucrose metabolism, tryptophan metabolism, tyrosine metabolism, phenylalanine metabolism, purine metabolism, acetaminophen metabolism pathway, retinol metabolism and valproic acid metabolism pathway.The results are helpful to understand the toxicological mechanisms of PM2.5 and screened out potential biomarkers of rats which exposure to PM2.5. | Lin Zhang Tengfei Xu Zifeng Pi Meizhu Zheng Fengrui Song Zhiqiang Liu | 2019 | Chinese Chemical Letters2019，30，1： | 0 |
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