Research on the Prediction of the Geological Spatial Information Using Gray GIS Modeling Method Based on the Borehole Data and the Geologic Map

2013 ◽  
pp. 107-115 ◽  
Author(s):  
Jun Tao ◽  
Xu Liu ◽  
Jinli Huang ◽  
Bohu Yu
Keyword(s):  
Spatial Information ◽  
Modeling Method ◽  
Borehole Data ◽  
Gis Modeling ◽  
Geologic Map

scholarly journals Airborne Electromagnetic and Radiometric Peat Thickness Mapping of a Bog in Northwest Germany (Ahlen-Falkenberger Moor)

2020 ◽  
Vol 12 (2) ◽  
pp. 203 ◽  
Author(s):  
Bernhard Siemon ◽  
Malte Ibs-von Seht ◽  
Stefan Frank
Keyword(s):  
Large Scale ◽  
Spatial Information ◽  
Borehole Data ◽  
Northwest Germany ◽  
Surface Data ◽  
Airborne Electromagnetic ◽  
Lateral Extent ◽  
Elevated Surface ◽  
Airborne Electromagnetic Data ◽  
Gradient Approach

Knowledge on peat volumes is essential to estimate carbon stocks accurately and to facilitate appropriate peatland management. This study used airborne electromagnetic and radiometric data to estimate the volume of a bog. Airborne methods provide an alternative to ground-based methods, which are labor intensive and unfeasible to capture large-scale (>10 km2) spatial information. An airborne geophysical survey conducted in 2004 covered large parts of the Ahlen-Falkenberger Moor, an Atlantic peat bog (39 km2) close to the German North Sea coast. The lateral extent of the bog was derived from low radiometric and elevated surface data. The vertical extent resulted from smooth resistivity models derived from 1D inversion of airborne electromagnetic data, in combination with a steepest gradient approach, which indicated the base of the less resistive peat. Relative peat thicknesses were also derived from decreasing radiation over peatlands. The scaling factor (µa = 0.28 m−1) required to transform the exposure rates (negative log-values) to thicknesses was calculated using the electromagnetic results as reference. The mean difference of combined airborne results and peat thicknesses of about 100 boreholes is very small (0.0 ± 1.1 m). Although locally some (5%) deviations (>2 m) from the borehole results do occur, the approach presented here enables fast peat volume mapping of large areas without an imperative necessity of borehole data.

Application of Three-Dimensional Modelling in the Study of Complex Geological Body

2013 ◽  
Vol 709 ◽  
pp. 567-570
Author(s):  
Ting Ting Zhang ◽  
Ke Yan Xiao
Keyword(s):  
Spatial Information ◽  
Three Dimensional ◽  
Spatial Relationship ◽  
Spatial Form ◽  
Borehole Data ◽  
Mine Area ◽  
Geological Body ◽  
Computer Visualization ◽  
Visualization Technology ◽  
D Model

Three-dimensional modelling technology was applied in this paper to construct models of complex geological body based on borehole data. The 3-D model of the rock, the orebody, the stratum, the fault and so on can be used to display the spatial form of these geological bodies and their spatial relationship, and to predict the trend of the deep ones. It brings geological working a new and multi-dimensional way compared with the traditional methods of confining 3-D information into2-D plane that losing the spatial information. This paper takes a mine area of China as an example to introduce the methods and workflow of the model making and the results of modelling are expressed based on the computer visualization technology.

scholarly journals Research on Modeling Method of 3D Geological Entity Model Based on BIM

2020 ◽  
Vol 198 ◽  
pp. 02031
Author(s):  
Huang Si-jie ◽  
Guo Yu-bin ◽  
Yu Chang-yi ◽  
Wang Xiao ◽  
Wang Qi-zhi
Keyword(s):  
Modeling Method ◽  
Secondary Development ◽  
Interpolation Algorithm ◽  
Main Program ◽  
Borehole Data ◽  
3D Geological Modeling ◽  
Modeling Accuracy ◽  
Geological Information ◽  
Development Technology ◽  
Section Analysis

The paper uses the BIM design platform Revit as the main program for modeling and debugging, relying on Lizheng survey drilling data, based on the Revit API secondary development technology and its modeling method, to carry out various algorithms involved in 3D geological modeling .The program design realizes automation and rapid establishment of 3D geological entity model, and enables it to have more comprehensive geological information query, section analysis and other functions. At the same time, in order to solve the problems of insufficient original borehole data or uneven borehole distribution, the paper proposes a virtual borehole generation method based on the moving quadric surface fitting interpolation algorithm, which effectively improves the modeling accuracy and the visualization effect of the model.

Vulnerable areas of phosphorus leaching - detection by gis-analysis and measurements of phosphorus sorption capacity

1996 ◽  
Vol 33 (4-5) ◽  
pp. 175-181 ◽  
Author(s):  
Horst Behrendt ◽  
Lena Lademann ◽  
Wolf-Gunther Pagenkopf ◽  
Rosemarie Pöthig
Keyword(s):  
Sorption Capacity ◽  
Spatial Information ◽  
Soil Types ◽  
Phosphorus Leaching ◽  
Phosphorus Sorption ◽  
Gis Modeling ◽  
Gis Model ◽  
Application Rates ◽  
Water Tables ◽  
Phosphorus Sorption Capacity

A model is presented to detect vulnerable areas of phosphorus leaching combing GIS-modeling and measurements on phosphorus sorption capacity of different soil types. The GIS-model uses spatial information on the topology, land use, soil types, water tables and climatic water balance. The phosphorus surplus of the agricultural topsoil is estimated based on the average of fertilizer use and the uptake by crops over a long period of time and, additionally, the application rates of manure around cowshed and pigsties. The model is applied to the catchment area of Lake Schwielochsee, a hypertrophic shallow lake situated about 100 km south-east of German capital, Berlin. The phosphorus content and the phosphorus sorption capacity were measured at several sides with differing soil types. Parameters of the GIS-model are deduced from the results of these measurements.

Practical Picture Processing

1974 ◽  
Vol 32 ◽  
pp. 338-339
Author(s):  
T. A. Welton
Keyword(s):  
Radiation Damage ◽  
Coherence Length ◽  
Spatial Information ◽  
State Of The Art ◽  
Coherent Radiation ◽  
The State ◽  
Energy Spread ◽  
Electron Micrograph ◽  
Picture Processing ◽  
Molecular Skeleton

Various authors have emphasized the spatial information resident in an electron micrograph taken with adequately coherent radiation. In view of the completion of at least one such instrument, this opportunity is taken to summarize the state of the art of processing such micrographs. We use the usual symbols for the aberration coefficients, and supplement these with £ and 6 for the transverse coherence length and the fractional energy spread respectively. He also assume a weak, biologically interesting sample, with principal interest lying in the molecular skeleton remaining after obvious hydrogen loss and other radiation damage has occurred.

3-D optical transfer in excitation field synthesis microscopes

1995 ◽  
Vol 53 ◽  
pp. 64-65
Author(s):  
Vijay Krishnamurthi ◽  
Brent Bailey ◽  
Frederick Lanni
Keyword(s):  
Standing Wave ◽  
Spatial Information ◽  
3D Structure ◽  
Complete Recovery ◽  
Weighting Factor ◽  
Optical Transfer Function ◽  
Excitation Field ◽  
Optical Transfer ◽  
Set Up ◽  
Focus Plane

Excitation field synthesis (EFS) refers to the use of an interference optical system in a direct-imaging microscope to improve 3D resolution by axially-selective excitation of fluorescence within a specimen. The excitation field can be thought of as a weighting factor for the point-spread function (PSF) of the microscope, so that the optical transfer function (OTF) gets expanded by convolution with the Fourier transform of the field intensity. The simplest EFS system is the standing-wave fluorescence microscope, in which an axially-periodic excitation field is set up through the specimen by interference of a pair of collimated, coherent, s-polarized beams that enter the specimen from opposite sides at matching angles. In this case, spatial information about the object is recovered in the central OTF passband, plus two symmetric, axially-shifted sidebands. Gaps between these bands represent "lost" information about the 3D structure of the object. Because the sideband shift is equal to the spatial frequency of the standing-wave (SW) field, more complete recovery of information is possible by superposition of fields having different periods. When all of the fields have an antinode at a common plane (set to be coincident with the in-focus plane), the "synthesized" field is peaked in a narrow infocus zone.

Use of EDS mapping to characterize thermochemical stability of fibers in intermetallic matrix composites

1992 ◽  
Vol 50 (1) ◽  
pp. 160-161
Author(s):  
John R. Porter
Keyword(s):  
Spatial Information ◽  
Beam Current ◽  
Fiber Types ◽  
Ceramic Fibers ◽  
Dye Transfer ◽  
Science Center ◽  
Commercial Development ◽  
Nih Image ◽  
Intermetallic Matrix Composites ◽  
Thermochemical Stability

New ceramic fibers, currently in various stages of commercial development, have been consolidated in intermetallic matrices such as γ-TiAl and FeAl. Fiber types include SiC, TiB2 and polycrystalline and single crystal Al2O3. This work required the development of techniques to characterize the thermochemical stability of these fibers in different matrices.SEM/EDS elemental mapping was used for this work. To obtain qualitative compositional/spatial information, the best realistically achievable counting statistics were required. We established that 128 × 128 maps, acquired with a 20 KeV accelerating voltage, 3 sec. live time per pixel (total mapping time, 18 h) and with beam current adjusted to give 30% dead time, provided adequate image quality at a magnification of 800X. The maps were acquired, with backgrounds subtracted, using a Noran TN 5500 EDS system. The images and maps were transferred to a Macintosh and converted into TIFF files using either TIFF Maker, or TNtolMAGE, a Microsoft QuickBASIC program developed at the Science Center. From TIFF files, images and maps were opened in either NIH Image or Adobe Photoshop for processing and analysis and printed from Microsoft Powerpoint on a Kodak XL7700 dye transfer image printer.

Characterisation of multilayer materials using a position-sensitive atom probe

1990 ◽  
Vol 48 (4) ◽  
pp. 624-625
Author(s):  
RAD Mackenzie ◽  
G D W Smith ◽  
A. Cerezo ◽  
J A Liddle ◽  
CRM Grovenor ◽  
...  
Keyword(s):  
Quantum Well ◽  
Quantum Wells ◽  
Spatial Information ◽  
Chemical Vapour ◽  
Atom Probe ◽  
Organic Chemical ◽  
Growth Stages ◽  
Multiple Quantum ◽  
Quartz Wool ◽  
Position Sensitive

The position sensitive atom probe (POSAP), described briefly elsewhere in these proceedings, permits both chemical and spatial information in three dimensions to be recorded from a small volume of material. This technique is particularly applicable to situations where there are fine scale variations in composition present in the material under investigation. We report the application of the POSAP to the characterisation of semiconductor multiple quantum wells and metallic multilayers.The application of devices prepared from quantum well materials depends on the ability to accurately control both the quantum well composition and the quality of the interfaces between the well and barrier layers. A series of metal organic chemical vapour deposition (MOCVD) grown GaInAs-InP quantum wells were examined after being prepared under three different growth conditions. These samples were observed using the POSAP in order to study both the composition of the wells and the interface morphology. The first set of wells examined were prepared in a conventional reactor to which a quartz wool baffle had been added to promote gas intermixing. The effect of this was to hold a volume of gas within the chamber between growth stages, leading to a structure where the wells had a composition of GalnAsP lattice matched to the InP barriers, and where the interfaces were very indistinct. A POSAP image showing a well in this sample is shown in figure 1. The second set of wells were grown in the same reactor but with the quartz wool baffle removed. This set of wells were much better defined, as can be seen in figure 2, and the wells were much closer to the intended composition, but still with measurable levels of phosphorus. The final set of wells examined were prepared in a reactor where the design had the effect of minimizing the recirculating volume of gas. In this case there was again further improvement in the well quality. It also appears that the left hand side of the well in figure 2 is more abrupt than the right hand side, indicating that the switchover at this interface from barrier to well growth is more abrupt than the switchover at the other interface.

Sign in / Sign up

Export Citation Format

Share Document