Radar Clutters from Inhomogeneities of the Ground Level Environment. Experimental Performances and Statistical Model;

In recent years, with rapid industrialization and massive energy consumption, ground-level ozone ( O 3 ) has become one of the most severe air pollutants. In this paper, we propose a functional spatio-temporal statistical model to analyze air quality data. Firstly, since the pollutant data from the monitoring network usually have a strong spatial and temporal correlation, the spatio-temporal statistical model is a reasonable method to reveal spatial correlation structure and temporal dynamic mechanism in data. Secondly, effects from the covariates are introduced to explore the formation mechanism of ozone pollution. Thirdly, considering the obvious diurnal pattern of ozone data, we explore the diurnal cycle of O 3 pollution using the functional data analysis approach. The spatio-temporal model shows great applicational potential by comparison with other models. With application to O 3 pollution data of 36 stations in Beijing, China, we give explanations of the covariate effects on ozone pollution, such as other pollutants and meteorological variables, and meanwhile we discuss the diurnal cycle of ozone pollution.

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A statistical model for 1-hour- to 24-hour-ahead prediction of hourly ozone concentrations at ground level in Singapore

Air Pollution XXII ◽

10.2495/air140321 ◽

2014 ◽

Author(s):

X. Liu ◽

Y. Hwang ◽

K. Yeo ◽

J. Hosking ◽

A. Barut ◽

...

Keyword(s):

Statistical Model ◽

Ground Level ◽

Ozone Concentrations

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VIIRS-based remote sensing estimation of ground-level PM2.5 concentrations in Beijing–Tianjin–Hebei: A spatiotemporal statistical model

Remote Sensing of Environment ◽

10.1016/j.rse.2016.07.015 ◽

2016 ◽

Vol 184 ◽

pp. 316-328 ◽

Cited By ~ 48

Author(s):

Jiansheng Wu ◽

Fei Yao ◽

Weifeng Li ◽

Menglin Si

Keyword(s):

Remote Sensing ◽

Statistical Model ◽

Ground Level

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Ground-Level Water Predication Using Time Series Statistical Model

Advances in Information Communication Technology and Computing - Lecture Notes in Networks and Systems ◽

10.1007/978-981-15-5421-6_43 ◽

2020 ◽

pp. 427-437

Author(s):

Sandeep Kumar Mittal ◽

Mamta Mittal ◽

Muhammad Sajjad Ali Khan

Keyword(s):

Time Series ◽

Statistical Model ◽

Ground Level

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Accuracy of Point Precipitation Measurements

Hydrology Research ◽

10.2166/nh.1980.0005 ◽

1980 ◽

Vol 11 (2) ◽

pp. 57-70 ◽

Cited By ~ 43

Author(s):

Peter Allerup ◽

Henning Madsen

Keyword(s):

Statistical Model ◽

Ground Level ◽

Solid Precipitation ◽

Statistical Errors ◽

Set Up

The normal-exposed Hellmann raingauge only catches about 85% of the true precipitation on yearly basis. This is mainly due to aerodynamic effects. A statistical model analysing the ratio of the daily amounts of precipitation measured at ground level and at standard height is set up for describing this influence. Corrections due to liquid and solid precipitation and three different kind of exposures are presented. Further the statistical errors on the corrections are estimated.

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Effects of Vibration on the Preparation of Ultrathin Sections

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010007223x ◽

1973 ◽

Vol 31 ◽

pp. 358-359

Author(s):

Joseph M. Blum ◽

Edward P. Gargiulo ◽

J. R. Sawers

Keyword(s):

Cutting Speed ◽

Ground Level ◽

Environmental Vibration ◽

Block Face ◽

Ultrathin Sections ◽

Embedding Medium ◽

Thickness Variations ◽

Building Walls ◽

Cutting Direction ◽

Diamond Knife

It is now well-known that chatter (Figure 1) is caused by vibration between the microtome arm and the diamond knife. It is usually observed as a cyclical variation in “optical” density of an electron micrograph due to sample thickness variations perpendicular to the cutting direction. This vibration might be induced by using too large a block face, too large a clearance angle, excessive cutting speed, non-uniform embedding medium or microtome vibration. Another prominent cause is environmental vibration caused by inadequate building construction. Microtomes should be installed on firm, solid floors. The best floors are thick, ground-level concrete pads poured over a sand bed and isolated from the building walls. Even when these precautions are followed, we recommend an additional isolation pad placed on the top of a sturdy table.

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