spatial modeling in gis
Tài liệu Building a Spatial Database in PostgreSQL pptx
... Discussion• Spatial data and spatial databases• Adding spatial extensions to PostgreSQL• OpenGIS and standards Spatial RelationshipsContainment: Rivers inside watersheds and land (islands) inside ... election.• Want to predict voting in 2001 by looking at voting in 1996.• Intersect the 2001 district polygon with the voting areas polygons.• Outside will have zero area• Inside will have 100% area• ... size– GiST index / Index extensions– Easy to add custom functionsThe OpenGIS Consortium From the OpenGIS Consortium guide“Much geospatial data is available on the web and in off-line archives,...
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ON CONSISTENCY CHECKING OF SPATIAL RELATIONSHIPS IN CONTENT-BASED IMAGE DATABASE SYSTEMS potx
... point in p(B).• p satisfies the relationship A behind B, stating that A is behind B in thepicture p, iff the z-coordinate of each point in p(A) is greater than the z-coordinate of each point in ... Mechanism in the Spatial Reasoning component will also be invokedto generate the compact/minimal image index at the Image Indexing stage. Ouriconic indexing approach will generate the 2D string representation ... Otherwise, continue (and we know Ginsideis acyclic).Suppose, for example, SRinside={A inside B, B inside C, C inside A}. ThenGTinsidecontains all nine spatial relationships Y inside Z, w...
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An Analysis of Geometric Modeling in Database Systems docx
... f& all ui in (u,, . . . , us] do Ui:= ui * T; 2.3 Scaling An important concept in viewing geometric objects on a computer display is varying the size in form of scaling (or stretching). Vertices ... is, the engineer, in order to retrieve and manipulate the data because it requires an intrinsic knowledge of the underlying schema definition. In order to retrieve all the bounding vertices ... allow the modeling of engineering objects in a natural way-or at least they do not support the retrieval and manipulation of such objects in a way that is familiar to engineers. In particular,...
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Báo cáo khoa học: "Stochastic Discourse Modeling in Spoken Dialogue Systems Using Semantic Dependency Graphs" pdf
... investigated. Three main services: registration information service, clinic information service, and FAQ information service are used. This system mainly provides the function of on-line registration. ... 4.102.709.1113.9612.8113.4611.5610.719.764.704.352.7502468101214OthersRegistration revisionDr.'s inforamtionTimeGreetingClinic informationRegistrationFAQDr. and ClinicConfirmatin (others)Confirmation (clinic)Cancel registration Figure 3 Frequencies ... computa-tion of meaning. World Scientific Publishing Co Inc. J. Gao, and H. Suzuki. 2003. Unsupervised learning of dependency structure for language modeling. In Proceedings of ACL 2003,...
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Innovations in GIS 4 ppt
... terrain for an ever-increasing range of GIS applications. At the same time, GIS users are becoming increasingly aware of the effects of error in their applications. In the digital terrainmodelling ... error-directed point insertion. For the purpose of insertingconstraining linear features into the pyramid, the method of classifying vertices by means of the verticalerror criterion is inadequate, since ... ofresearchers working in such disciplines as photogrammetry, surveying, cartography, civil and miningengineering, geology, geography and hydrology. The uncoordinated and independent nature...
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Mathematical Modeling in Mechanics of Granular Materials potx
... pure phenomenological modeling withouttaking into account the microstructural behavior. On the other hand, this approachis an engineering method in material modeling since the parameter identification ... total system for determining strain from given stress or stress from givenstrain for εv>εp. Hence it follows that strain is determined in terms of stress byintegrating the differential ... added.Looking on the basics of this book it is obvious that the starting point is themethod of rheological models. In Continuum Mechanics one can split theapproaches in material modeling into three...
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Báo cáo khoa học: Amyloid-b protofibril levels correlate with spatial learning in Arctic Alzheimer’s disease transgenic mice docx
... of training, to measure the improve-ment in spatial learning. Thigmotaxis, circling and floatingactivities, as defined by the hsv image software, wererecorded and animals (n = 4) displaying such ... protofibrils in the brain, making tg-ArcSwe a highly suitable modelfor investigating the pathogenic role of these Ab assemblies. In the presentstudy, we estimated Ab protofibril levels in the brain and ... 24 h. Interestingly, highlevels of protofibrils, but not total Ab, were associatedwith inferior spatial learning, at least in young mice.This implies that Ab protofibril levels in the brain oftg-ArcSwe...
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Báo cáo khoa học: "Spatial Lexicalization in the Translation of Prepositional Phrases" pot
... The bilin- gual lexical rules presented here will further refine the idea of a tlink by minimizing the number of bilingual lexical entries that have to be coded manually, since the bilingual ... role in determining which readings of a preposition sense are allowed. Deciding whether the preposition is used in a spatial sense, as opposed to a temporal or causative sense, is determined ... and of having bilingual lexical rules which op- erate over the bilingual lexicon to expand it. By for- mulating regularities in this way consistency and com- pactness in the bilingual lexicon,...
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Báo cáo khoa học: "Modeling Inflection and Word-Formation in SMT" doc
... their POS tags in the input. Verbs are in ected in the input (“haben”, meaning“have” as in “they have”, in the example). Prepositions are lexicalized (“zu” in the example) and indicate whichcase ... BLEU. We again see many in- teresting generalizations. For instance, take thecase of translating English miniature cameras tothe German compound Miniaturkameras. minia-ture camera or miniature ... occur in the training data, and so there is no appropri-ate phrase pair in any system (baseline, in ec-tion, or in ection&compound-splitting). How-ever, our system with compound splitting...
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Probabilistic Modeling in Bioinformatics and Medical Informatics potx
... N.AsinFigure 1.4, the uncertainty decreases with increasing sample size N ,whichreflects the obvious fact that our trust in the estimation increases as moretraining data become available. Since ... Friedman. Learning belief networks in the presence of missing valuesand hidden variables. In D. H. Fisher, editor, Proceedings of the Four-teenth International Conference on Machine Learning (ICML), ... in bioinformatics and in medical informatics, were quitead hoc. In recent years, however, substantial progress has been made in ourunderstanding of and experience with probabilistic modelling....
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Báo cáo khoa học: "Distributed Word Clustering for Large Scale Class-Based Language Modeling in Machine Translation" docx
... pruning and clustering. In Proceedings of the IEEE International Conference onSpoken Language Processing (ICSLP), Beijing, China.Joshua Goodman. 2000. A bit of progress in language modeling. ... in the log-linear com-bination in Eq. (11). The weights are trained usingminimum error rate training (Och, 2003) with BLEUscore as the objective function.The dev and test data sets contain ... expect to be able to increase thegains resulting from using class-based models byusing more sophisticated techniques for combiningthem with word-based models such as linear inter-polations of...
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