Journal of the International Association for Mathematical Geology
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Analysis and Estimation of Natural Processes with Nonhomogeneous Spatial Variation Using Secondary Information
Journal of the International Association for Mathematical Geology - Tập 30 - Trang 57-76 - 1998
Natural processes encountered in mining, hydrogeologic, environmental, etc.
applications usually are poorly known because of scarcity of data over the area
of interest. Therefore, stochastic estimation techniques are the tool of choice
for a careful accounting of the heterogeneity and uncertainty involved. Within
such a framework, a better utilization of all available data concerning the
process o...
Target search by golden weave
Journal of the International Association for Mathematical Geology - Tập 13 - Trang 391-398 - 1981
The optimal sequential procedure for performing a track search of a region is by
the method of successive halving. This method minimizes the minimum deviation
from the ideality of sequential division of a region into equally sized areas.
For most track searches no cost is incurred in going from an exit point on the
perimeter of a region to the next entry point. In the special circumstance where
th...
Spatial relationships of multivariate data
Journal of the International Association for Mathematical Geology - Tập 24 - Trang 731-758 - 1992
Spatial factor analysis (SFA) is a multivariate method that determines linear
combinations of variables with maximum autocorrelation at a given lag. This is
achieved by deriving estimates of auto-/cross-correlations of the variables and
calculating the corresponding eigenvectors of the covariance quotient matrix. A
two-point spatial factor analysis model derives factors by the formation of
transit...
Note on estimates of some parameters in hydraulic geometry
Journal of the International Association for Mathematical Geology - Tập 1 - Trang 115-118 - 1969
Kiểm định chéo của kriging trong một láng giềng đơn nhất Dịch bởi AI
Journal of the International Association for Mathematical Geology - Tập 15 - Trang 687-699 - 1983
Kiểm định chéo là một công cụ phù hợp để kiểm tra các phương pháp nội suy: nó
bao gồm việc bỏ qua một điểm dữ liệu tại một thời điểm và xác định mức độ chính
xác mà điểm này có thể được ước lượng từ các dữ liệu còn lại. Kiểm định chéo
thường được sử dụng để kiểm tra các mô hình kriging "láng giềng di động"; trong
trường hợp này, mỗi giá trị chưa biết được dự đoán từ một số lượng nhỏ dữ liệu
xung q...
The effects of closure on the moments of a distribution
Journal of the International Association for Mathematical Geology - Tập 11 - Trang 75-84 - 1979
When percentages are formed from uncorrelated, normally distributed parent
variables the moments of the percentage distribution may differ considerably
from those of the parents. Equations can be derived which enable the
approximation of the moments of a percentage variable in terms of the moments of
the parent distribution, the row sum statistics, and the correlation between a
part of a sum and t...
A method for the mathematical analysis of the cross-sectional geometry of tidal inlet channels
Journal of the International Association for Mathematical Geology - Tập 8 - Trang 635-647 - 1976
Analysis of channel cross sections is hindered by lack of parameters to describe
the shape of the cross section. In the situation of a sample of cross sections
taken across tidal inlets, if the cross section is expressed as an observation
vector, principal-component analysis can be used to derive eigenvectors for the
data set. By neglecting eigenvectors that explain little variance, mathematical
r...
Statistical techniques and their application in palynology
Journal of the International Association for Mathematical Geology - Tập 5 - Trang 297-311 - 1973
The basic principals of hypothesis testing are reviewed, including the
development of the hypothesis, the statistical assumptions made, and the test of
the hypothesis. The appropriate experimental design and sampling technique for
evaluation of hypotheses posed are discussed. Because the analysis of variance
involving the F-test should be used in a wide variety of geological experiments,
emphasis ...
Stratigraphic correlation of subsurface geologic data by computer
Journal of the International Association for Mathematical Geology - Tập 4 - Trang 331-343 - 1972
Manual, semiautomatic, and fully automatic procedures for correlating subsurface
data are reviewed. Special emphasis is placed on the use of electric-log data,
including that of the dipmeter log, in this discussion. The Holgate method is
described for its use in “fine-tuning” or refining gross correlations. A
procedure for creating a matrix map for empirically establishing correlation
between sets...
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