scholarly journals WITHDRAWN: A precise TIN clipping algorithm taking into account of local detail features

Author(s):  
Jingchang Zhao
Keyword(s):  
PLoS ONE ◽  
2013 ◽  
Vol 8 (5) ◽  
pp. e63964 ◽  
Author(s):  
Leon Fonville ◽  
Nick P. Lao-Kaim ◽  
Vincent Giampietro ◽  
Frederique Van den Eynde ◽  
Helen Davies ◽  
...  

2013 ◽  
Vol 365-366 ◽  
pp. 261-267
Author(s):  
Zhi Ming Liu ◽  
Wei Gang Hu ◽  
Yue Chen

In order to study the influence of welding process and local detail design to the life of the metro bogie frame, this paper, in view of the tee joint, researched the superposition of residual stress and external load influence on the structure strength by the finite element simulation to establish mechanical structure and welding process co-design method. Based on the above research, the fatigue strength of the overlapping structure of welding frame socket plate and beam was improved, by the co-design of the groove angle and joint-welding sequence.


2013 ◽  
Vol 347-350 ◽  
pp. 2528-2532 ◽  
Author(s):  
Ming Fu ◽  
Jun Huang ◽  
Jun Xu

Based on analyzing and experimenting a large number of the existing fingerprint image preprocessing algorithm, this paper presents a novel high-quality fingerprint image preprocessing algorithm. Taking full account of the inherent characteristics of the fingerprint image, the algorithm arranges overall features and local detail. The experiments show that it is a simple, efficient algorithm which can improve the quality of the fingerprint image, and lay a good foundation for the subsequent processing.


1970 ◽  
Vol 7 (4) ◽  
pp. 1062-1076 ◽  
Author(s):  
A. C. Grant ◽  
K. S. Manchester

Continuous seismic profiler surveys have defined the limits of the Paleozoic outlier in Ungava Bay, and indicate that similar rocks occur to the north beneath Hudson Strait. These surveys have shown also that the strata underlying Hudson Strait are down-warped to form a synclinal structure with its axis parallel to the bathymetric trend of the Strait. Extrapolations based upon the dips and thicknesses indicated on the seismic profiler records and on physiographic evidence, suggest that the southwestern side of Hudson Strait has been down-faulted relative to the block of Paleozoic strata in Ungava Bay. These relationships postulated on the basis of seismic profiler results are supported by aeromagnetic, sea-magnetometer, and sea-gravimeter data from that region. A seismic and magnetic profile from Frobisher Bay indicates that a Paleozoic outlier occurs there as well. Although the submarine physiography of this region is primarily controlled by structure and secondarily modified by sub-aerial erosion, glacial erosion may account for local detail.


2020 ◽  
Author(s):  
Jingchang Zhao ◽  
Fei Gao ◽  
Guangwei Liu ◽  
Dong Wang

Abstract TIN clipping algorithm is one of the basic algorithms for digital mining design of open-pit coal mine based on TIN model. In this paper, a precise TIN clipping algorithm for digital mining design of open-pit coal mine is proposed. Based on the constructed grid index of the clipped TIN and the clipping polygon, the clipping polygon is embedded into the clipped TIN by interpolating the vertex elevation of the clipping polygon and calculating its intersections with the clipped TIN. Then, according to the reconstructed topology of the TIN triangles located inside (outside) the clipping polygon, generate the boundary of those two triangles set, and construct the TIN between the boundaries using the one-time edge-prior CDT growth algorithm, thus , achieve the precise TIN clipping keeping the clipped TIN’s local detail features. The experiment results show that the algorithm proposed in this paper is efficient, stable in performance, and it has been applied to the digital mining design of the open-pit coal mine.


2013 ◽  
Author(s):  
Arnaud Gelas

Deforming a 3D surface mesh while preserving its local detail is useful for editing anatomical atlases or for mesh based segmentation. This contribution introduces new classes for performing hard and soft constraints deformation in a flexible design which allows user to switch easily in between Laplacian discretization operators, area weighing and solvers. The usage of these new classes is demonstrated on a sphere.


2021 ◽  
Vol 27 (2) ◽  
pp. 171-175
Author(s):  
Colin Richmond

Abstract On the basis of reports that Jan van Eyck visited England (he was well traveled in the service of Philip the Good, duke of Burgundy), this essay speculates freely on what the diplomat and painter actually did in and around London for three weeks in 1428. The essay claims, for example, that van Eyck went to the village of Foots Cray to buy watercresses to use as models when painting greenery on the Ghent Altarpiece of the Mystic Lamb (which he completed in 1432). The recently erected gateway to the palace at Greenwich is said likewise to be the model for a towered gateway depicted on the altarpiece. After providing local detail about relevant parts of England in 1428, the essay closes with speculation (although the author writes, “The facts are known”) about the origin of a harp, of a purportedly Welsh variety, appearing on the altarpiece in the hands of an angel. The author argues that it was the instrument of an itinerant Breton musician whom van Eyck had heard in recital at the Poor Clares convent of the Holy Trinity at the Minories in Aldgate. The harpist subsequently murdered his Stepney landlady and was himself killed by enraged local housewives. Van Eyck is said to have purchased the man's harp when his worldly goods were posthumously sold.


2021 ◽  
pp. 002242942198996
Author(s):  
Ryan D. Shaw ◽  
Amy Auletto

Access to music education in American schools is not guaranteed. Although national studies have demonstrated disparities based on poverty, race, and other markers, these studies miss a necessary level of local detail in describing access. Additionally, studies that exist are based on self-report surveys and prone to nonresponse bias. The purpose of this study was to describe access to music education at the state level. Using Michigan administrative data provided by the state department of education, we describe the state’s population of music educators and examine student access to music education. We found that music teachers differed from nonmusic teachers in a number of ways. We also identified substantial and persistent disparities in access to music education across the state. These findings have important implications for school arts education policy.


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