A Comparison of Precise Leveling and Persistent Scatterer SAR Interferometry for Building Subsidence Rate Measurement

Autor: Paavo Rouhiainen, Jarkko Koskinen, Veikko Saaranen, Juha Hyyppä, Mika Karjalainen, Kirsi Karila

Publikováno v: ISPRS International Journal of Geo-Information, Vol 2, Iss 3, Pp 797-816 (2013)

It is well known that the most accurate method to detect changes of height is the geodetic precise leveling method. Due to the high demand work and time needed for precise leveling alternative methods are studied to obtain high quality height informa

Externí odkaz: https://doaj.org/article/49c7becbf07446aca360051d1dd6a467

Theoretical and experimental study of particle collection characteristics of high-velocity multijet cascade impactors

Autor: Risto Hillamo, Juhani Ruuskanen, Esko I. Kauppinen, Timo Hakkarainen, Paavo Rouhiainen

Publikováno v: Kauppinen, E, Hillamo, R, Ruuskanen, J, Hakkarainen, T & Rouhiainen, P 1986, ' Theoretical and experimental study of particle collection characteristics of high-velocity multijet cascade impactors ', Journal of Aerosol Science, vol. 17, no. 3, pp. 506-510 . https://doi.org/10.1016/0021-8502(86)90145-X

The absolute gas pressure at the impaction plate varies depending on the relative position of the jet orifice and the pressure tap. For subsonic flows, the pressure at the collection plate below the jet is quite near the upstream stagnation pressure.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0f54d52f069488a5c812112d58b20479
https://doi.org/10.1016/0021-8502(86)90145-x