Proceedings 14th International Conference on Scientific and Statistical Database Management
1099-3371
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Efficient techniques for range search queries on earth science data
- Trang 142-151
We consider the problem of organizing large scale earth science raster data to efficiently handle queries for identifying regions whose parameters fall within certain range values specified by the queries. This problem seems to be critical to enabling basic data mining tasks such as determining associations between physical phenomena and spatial factors, detecting changes and trends, and content b...... hiện toàn bộ
#Geoscience #Large-scale systems #Data mining #Information retrieval #Content based retrieval #Data structures #Computational modeling #Educational institutions #Organizing #Tree data structures
Similarity searching for multi-attribute sequences
- Trang 175-184
We investigate the problem of searching similar multiattribute time sequences. Such sequences arise naturally in a number of medical, financial, video, weather forecast, and stock market databases where more than one attribute is of interest at a time instant. We first solve the simple case in which the distance is defined as the Euclidean distance. Later we extend it to shift and scale invariance...... hiện toàn bộ
#Weather forecasting #Databases #Discrete Fourier transforms #Stock markets #Economic forecasting #Euclidean distance #Wavelet transforms #Computer science #Mathematics #Indexes
Access Support Tree and TextArray: a data structure for XML document storage and retrieval
- Trang 155-164
The characteristics of XML documents require new ways of storing and querying such documents. Queries on both textual content and structural aspects must be supported efficiently. For this reason, we examined existing work on both document storage approaches and models for querying documents to derive requirements that are essential for the storage of XML documents. As a result of our study, we de...... hiện toàn bộ
#Tree data structures #XML #Information retrieval #Data structures #Content based retrieval #Database languages #Computer science #Internet #Search engines #Merging
Joint queries estimation from multiple OLAP databases
- Trang 241
Given an OLAP query expressed over a collection of source OLAP databases, we study the problem of computing the result OLAP target database when the underlying detail data of the source databases are not available. The problem arises when the source databases do not have the same category attributes, and it is not possible to derive the result from a single database. The method we use is the linea...... hiện toàn bộ
#Databases #Yield estimation #Cyclotrons #Interpolation #Demography #State estimation
Using the GRID for biodiversity research: the GRAB demonstrator
- Trang 11-14
In the GRAB (Grid and Biodiversity) project we are developing a prototype to illustrate some aspects of the GRID's potential for collaborative biodiversity research. A catalogue of life, two species information systems (SISs) and a climate database are made available in a problem solving environment that demonstrates how bioclimatic modelling can be performed by bringing together such resources. W...... hiện toàn bộ
#Biodiversity #Databases #Organisms #Informatics #Prototypes #SPICE #Computer science #Environmental factors #Biology #Collaboration
A negotiation agent for distributed heterogeneous statistical databases
- Trang 207-216
The World-Wide Web provides an ever-increasing source of diverse information. We focus on query agents, in particular the matching and negotiation agents that are responsible for pre-integration where the matching agent decomposes the query into sub-queries, and then searches metadata to find datasets that match the query fragments. In the case of heterogeneous data, the matching agent utilises a ...... hiện toàn bộ
#Distributed databases #Intelligent agent #Aggregates #Statistics #Distributed computing #Internet #Testing #Runtime #Software agents #Artificial intelligence
ATreeGrep: approximate searching in unordered trees
- Trang 89-98
An unordered labeled tree is a tree in which each node has a string label and the parent-child relationship is significant, but the order among siblings is unimportant. This paper presents an approach to the nearest neighbor search problem for these trees. Given a database D of unordered labeled trees and a query tree Q, the goal is to find those trees in D that "approximately" contain Q. Our appr...... hiện toàn bộ
#XML #Computer science #Nearest neighbor searches #Phylogeny #Decision trees #Change detection algorithms #Object oriented databases #Filters #Algorithm design and analysis #Object oriented modeling
Accelerating high-dimensional nearest neighbor queries
- Trang 109-118
The performance of nearest neighbor (NN) queries degrades noticeably with increasing dimensionality of the data due to reduced selectivity of high-dimensional data and an increased number of seek operations during NN-query execution. If the NN-radii were known in advance, the disk accesses could be reordered such that seek operations are minimized. We therefore propose a new way of estimating the ...... hiện toàn bộ
#Acceleration #Nearest neighbor searches #Neural networks #Sampling methods #Fractals #Image segmentation #Genomics #Bioinformatics #Databases #Computer science
Thiết kế và triển khai ngôn ngữ truy vấn dữ liệu dựa trên nghĩa Dịch bởi AI
- Trang 20-23
Chúng tôi trình bày thiết kế và triển khai một ngôn ngữ truy vấn dữ liệu dựa trên nghĩa - MDDQL - nhằm mục đích xây dựng các truy vấn thông qua những gợi ý từ hệ thống về các thuật ngữ truy vấn dựa trên ngôn ngữ tự nhiên cho cả lĩnh vực ứng dụng khoa học và các thuật ngữ toán tử/hoạt động. Một bảng đen xây dựng truy vấn được sử dụng, nơi các thuật ngữ ngôn ngữ truy vấn được gợi ý cho người dùng bằ...... hiện toàn bộ
#Database languages #Natural languages #Vocabulary #Ontologies #Engines #Computer science #Application software #Data models #Software packages #Database systems
A conceptual framework for composing and managing scientific data lineage
- Trang 15-19
Scientific research relies as much on the dissemination and exchange of data sets as on the publication of conclusions. Accurately tracking the lineage (origin and subsequent processing history) of scientific data sets is thus imperative for the complete documentation of scientific work. However, the lack of a definitive data model for lineage, and the poor fit between current data management tool...... hiện toàn bộ
#History #Yarn #Environmental management #Documentation #Data models #Software tools #Software prototyping #Prototypes #Assembly #Pipelines