Assessment of Models to Estimate Bus-Stop Level Transit Ridership using Spatial Modeling Methods

The article discusses aerodrome geospatial modeling methods and geoinformation analysis for determining land use zones and obstacle restriction areas. Tall trees, buildings and structures, exceeding special limitation surfaces in the aerodrome flight areas, are obstacles that are dangerous. Using spatial modelling, which determines maximal permissible heights, it is proposed to predict the heights of natural and artificial vertical objects in order to analyse and plan land use capabilities. As a basis for spatial modeling, it is proposed to use stereoscopic models with a resolution of 0.3m, built on aircraft-based scanner images. Using the methods of geoinformation analysis, it is suggested to make horizontal zoning of aerodrome areas according to the most important air navigation safety and ecological indicators (power lines, roads, permitted classes of construction objects location). The study presents the research results of the proposed methodology for the Republic of Belarus aerodrome.

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APPLYING MULTIVARIATE GEOSTATISTICS FOR TRANSIT RIDERSHIP MODELING AT THE BUS STOP LEVEL

Boletim de Ciências Geodésicas ◽

10.1590/1982-2170-2020-0069 ◽

2021 ◽

Vol 27 (2) ◽

Author(s):

Samuel de França Marques ◽

Cira Souza Pitombo

Keyword(s):

Multivariate Geostatistics ◽

Bus Stop ◽

Transit Ridership

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Improvement of Spatial Autocorrelation, Kernel Estimation, and Modeling Methods by Spatial Standardization on Distance

ISPRS International Journal of Geo-Information ◽

10.3390/ijgi8040199 ◽

2019 ◽

Vol 8 (4) ◽

pp. 199 ◽

Cited By ~ 3

Author(s):

Souris ◽

Demoraes

Keyword(s):

Spatial Analysis ◽

Spatial Autocorrelation ◽

Presidential Election ◽

Spatial Modeling ◽

Kernel Estimation ◽

Direct Impact ◽

Modeling Methods ◽

Weighted Means ◽

Point Set ◽

Surface Calculation

In a point set in dimension superior to 1, the statistical distribution of the number of pairs of points as a function of distance between the points of the pair is not uniform. This distribution is not considered in a large number of classic methods based on spatially weighted means used in spatial analysis, such as spatial autocorrelation indices, kernel interpolation methods, or spatial modeling methods (autoregressive, or geographically weighted). It has a direct impact on the calculations and the results of indices and estimations, and by not taking into account this distribution of the distances, spatial analysis calculations can be biased. In this article, we introduce a "spatial standardization", which corrects and adjusts the calculations with respect to the distribution of point pairs distances. As an example, we apply this correction to the calculation of spatial autocorrelation indices (Moran and Geary indices) and to trend surface calculation (by spatial kernel interpolation) on the results of the 2017 French presidential election.

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Image Analysis of Intramembrane Particles in Freeze-Fractured Biomembranes Using Computer Simulation Techniques

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100114694 ◽

1975 ◽

Vol 33 ◽

pp. 214-215

Author(s):

D.J. Benefiel ◽

R.S. Weinstein

Keyword(s):

Membrane Proteins ◽

Freeze Fracture ◽

Integral Membrane Proteins ◽

Systematic Evaluation ◽

Intramembrane Particles ◽

Modeling Methods ◽

Simulation Techniques ◽

Freeze Fracture Electron Microscopy ◽

Fracture Electron ◽

Computer Simulation Techniques

Intramembrane particles (IMP or MAP) are components of most biomembranes. They are visualized by freeze-fracture electron microscopy, and they probably represent replicas of integral membrane proteins. The presence of MAP in biomembranes has been extensively investigated but their detailed ultrastructure has been largely ignored. In this study, we have attempted to lay groundwork for a systematic evaluation of MAP ultrastructure. Using mathematical modeling methods, we have simulated the electron optical appearances of idealized globular proteins as they might be expected to appear in replicas under defined conditions. By comparing these images with the apearances of MAPs in replicas, we have attempted to evaluate dimensional and shape distortions that may be introduced by the freeze-fracture technique and further to deduce the actual shapes of integral membrane proteins from their freezefracture images.

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