نتایج جستجو برای: cluster categories
تعداد نتایج: 307443 فیلتر نتایج به سال:
Different strategies and theories have been proposed to solve problems of urban decline phenomenon and its different economic, social, physical, and environmental aspects summarized in urban regeneration approach. Based on the production of culture as a new regeneration approach, regeneration supports creative industries and uses cluster development of these industries as a centerpiece of regen...
A novel study is presented that explores the effect that learning internally organized categories has on the ability to subsequently discriminate category members. The results demonstrate the classic categorical perception effect whereby discrimination of stimuli that belong to different categories is improved following training, while the ability to discriminate stimuli belonging to the same c...
We address the problem dealing with a large collection of data, and investigate the use of automatically constructing category hierarchy from a given set of categories to improve classification of large corpora. We use two wellknown techniques, partitioning clustering, means and a to create category hierarchy. -means is to cluster the given categories in a hierarchy. To select the proper number...
This study proposes an innovative measure for evaluating the performance of text clustering. In using K-means algorithm and Kohonen Networks for text clustering, the number clusters is fixed initially by configuring it as their parameter, while in using single pass algorithm for text clustering, the number of clusters is not predictable. Using labeled documents, the result of text clustering us...
Consumption of different food categories varies across the US+ A cluster analysis of 52 markets based on food sales in 62 categories found 11 market groupings with similar consumption patterns+ These new market groupings were compared with a cluster analysis based on data from 10 years earlier+ Many patterns were similar but a few shifts in consumption patterns were also noted+ Evidence suggest...
In this work, we study constrained clustering, where some constraints are utilized to guide the clustering process. In existing work on this topic, two main categories of constraints have been explored, namely pairwise and cardinality constraints. Pairwise constraints enforce that the cluster labels of two instances be the same (must-link constraints) or different (cannot-link constraints). Car...
We applied hierarchical cluster analysis to an Aerodyne aerosol mass spectrometer (AMS) bulk mass spectral dataset collected aboard the NOAA research vessel Ronald H. Brown during the 2002 New England Air Quality Study off the east coast of the United States. Emphasizing the organic peaks, the cluster analysis yielded a series 5 of categories that are distinguishable with respect to their mass ...
We examined the cortical representation of semantic categorization using magnetic source imaging in a task that revealed both dissociations among superordinate categories and associations among different base-level concepts within these categories. Around 200 ms after stimulus onset, the spatiotemporal correlation of brain activity elicited by base-level concepts was greater within than across ...
Technology development (TD) plays a key role in national competitiveness (NC) by giving a country a competitive edge in our age of information. Lots of researchers have focused on specific areas of TD, such as technology transfer, technology acquisition, and technology management, in most of developed countries. To our knowledge, however, they have seldom discussed the influence of TD on other ...
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