The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Experiments are carried out on datasets with different dimensions selected from UCI datasets by using two classical clustering algorithms. The results of the experiments indicate that when the dimensionality of the real dataset is less than or equal to 30, the clustering algorithms based on distance are effective. For high-dimensional datasets--dimensionality is greater than 30, the clustering algorithms...
The paper introduces satellite remote sensing technology used into marine traffic investigation, to detect and analyze actual marine traffic situation on a large scale. The paper introduces characteristics of SAR image and the procedure for extracting information of vessels based on the SAR Remote Sensing image. Vessel Detection Technology is studied based on multi-source space borne SAR data, after...
Normalization is a basic principle when designing the relational database, which guarantees the revision of data structure and the quality of reorganization, but when referring to data mining system, anti-normalization is needed for data warehouse design. This paper discusses the necessity of anti-normalization and the typical design methods. At the same time, it explains how to realize the data warehouse...
Service-oriented computing, cloud computing, and web services composition mark cornerstones of a paradigm shift in software systems engineering. The general new idea is to use as much as possible services that are made available by others, mostly disseminated via the web. In this paper, we present an abstract model for clouds as federations of services together with a specification of semantics and...
Standardization is a basic principle to design the relational database, which guarantees the revision of data structure and the quality of reorganization, but when referring to data mining system, anti-standardization is needed for data warehouse design. This paper discusses the necessity of anti-standardization and the specific design methods. With the development of data mining application, the...
The self-similarity of complex networks has broad practical backgrounds, yet the self-similarity of network has been rarely studied. One of the problems is to explore the origination of self-similarity in real networks. For this purpose, we proposed the information transfer model in network. The volume dimension integrating the information transfer model is given to analysis the self-similarity of...
This paper presents an on-going project of developing a suite of intelligent diagnostic tools for evaluating power transformer insulation systems. Our ultimate goal is to exploit techniques for automatically processing the measurement data, extracting meaningful information and subsequently transforming the information into domain-specific knowledge which can be utilized for indicating power transformer...
Data visualization can represent clearly the data difference and data change trend. It can help scientific researchers find the rules and trends behind the data quickly. In the process of monitoring eco-environment in Three Gorges reservoir area, a large database (>TB) of data has been acquired. How to fully utilize these data to analyze the trend and evaluate the eco-environmental impact of Three...
Queries committed to the search engines are usually short. They usually contain insufficient information to the IR system. Previous research has proposed the utilization of query expansion to deal with this problem. However, expansion terms are usually determined on term co-occurrences within documents. Sometimes the expansion terms don't represent the user's real intent. In this study, we propose...
Query expansion (QE) is one of the most important mechanisms in the information retrieval field. A typical QE method usually redefines the query with related terms. These techniques suffer from retrieval performance degradation due to imprecise choice of query's additive terms in the QE process. Semantic expansion is proposed to improve query precision, while the expansion concept is hard to be obtained...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.