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Article: Visualization of errors on form-factor computation

TitleVisualization of errors on form-factor computation
Authors
Issue Date1994
PublisherHong Kong Institution of Engineers. The Journal's web site is located at http://www.hkie.org.hk/html/publications/transactions/index.asp
Citation
Transactions Hong Kong Institution Of Engineers, 1994, v. 1 n. 1, p. 65-72 How to Cite?
AbstractThis paper compares the form-factors obtained using the hemi-cube [3] and the Wallace's ray tracing method [13] with the exact values computed according to the analytical formula [1]. The experiments are conducted for both non-blocking and partial blocking cases. The errors obtained are then displayed using color-coded images. These pictures give strong clues to the magnitude and the sources of the errors. It is found that the errors of the hemi-cube method depend on the the aspect ratio of the source patch, the normalized distance between the source and a receiving patch, and the degree of partial blocking. Aliasing effect is observed in the pictures obtained using the ray tracing method. The seriousness depends on the number and the distribution of the sample disks. Moreover, the approximated formula of the ray tracing method may induce as much as 15% of relative errors. Guidelines for reducing errors in using the two methods are suggested.
Persistent Identifierhttp://hdl.handle.net/10722/152249
ISSN
2015 SCImago Journal Rankings: 0.145

 

DC FieldValueLanguage
dc.contributor.authorWong, KWen_US
dc.contributor.authorTsang, WWen_US
dc.date.accessioned2012-06-26T06:36:44Z-
dc.date.available2012-06-26T06:36:44Z-
dc.date.issued1994en_US
dc.identifier.citationTransactions Hong Kong Institution Of Engineers, 1994, v. 1 n. 1, p. 65-72en_US
dc.identifier.issn1023-697Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/152249-
dc.description.abstractThis paper compares the form-factors obtained using the hemi-cube [3] and the Wallace's ray tracing method [13] with the exact values computed according to the analytical formula [1]. The experiments are conducted for both non-blocking and partial blocking cases. The errors obtained are then displayed using color-coded images. These pictures give strong clues to the magnitude and the sources of the errors. It is found that the errors of the hemi-cube method depend on the the aspect ratio of the source patch, the normalized distance between the source and a receiving patch, and the degree of partial blocking. Aliasing effect is observed in the pictures obtained using the ray tracing method. The seriousness depends on the number and the distribution of the sample disks. Moreover, the approximated formula of the ray tracing method may induce as much as 15% of relative errors. Guidelines for reducing errors in using the two methods are suggested.en_US
dc.languageengen_US
dc.publisherHong Kong Institution of Engineers. The Journal's web site is located at http://www.hkie.org.hk/html/publications/transactions/index.aspen_US
dc.relation.ispartofTransactions Hong Kong Institution of Engineersen_US
dc.titleVisualization of errors on form-factor computationen_US
dc.typeArticleen_US
dc.identifier.emailTsang, WW:tsang@cs.hku.hken_US
dc.identifier.authorityTsang, WW=rp00179en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0028493362en_US
dc.identifier.hkuros535-
dc.identifier.volume1en_US
dc.identifier.issue1en_US
dc.identifier.spage65en_US
dc.identifier.epage72en_US
dc.publisher.placeHong Kongen_US
dc.identifier.scopusauthoridWong, KW=25939117600en_US
dc.identifier.scopusauthoridTsang, WW=7201558521en_US

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