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Based on dynamic research perspectives of time slicing, this paper shows an endeavor on mining dynamic features of the scientific teams. Traditionally the static method of network structure analysis can successfully be used to analyze the distribution of network resource structure. But it cannot be used to explore the dynamic features of research groups, because of its lacks on the influence of some...
With the social network being widely used, people would like to use the friends recommendation provided by a social websites. There are lots of methods to make the recommendation results more accurately and efficiently. By considering the feature selection strategy in the stage of data preprocessing, we propose a novel friend recommendation system using a classification model, which formulates the...
Online social networks (OSN) have become more and more popular and have accumulated a great many users. Friend recommendation can help users discover their interested friends and alleviate the problem of information overload. However, most of existing recommendation methods only consider user link or content information and hence are not effective enough to provide high quality recommendations. In...
The significance of time in information production and consumption has been recognised in information retrieval research. Temporal information plays an important role in the webpage retrieval. The webpage has both the temporal metadata and temporal semantics in the content. However, the existing search engines conduct the information retrieval based on text keywords rather than temporal semantics...
It has attracted extensive interests to discover knowledge from data streams generated in real-time. At present, there are some data streams mining frameworks, providing mining solutions for data streams. This paper proposes an on-demand framework (SRAStream) based on the concept drifting detection. SRAStream allows quick clustering with certain accuracy using only limited resource, enabling the real-time...
Large-scale natural or man-made disasters have the potential to cause great loss of life, human injury and extreme property damage. Evacuation from areas at risk is often one of the most feasible strategies that can be undertaken in response to these types of disasters. Evacuating a large population in the shortest possible time is an extremely complicated and difficult task, which primarily relies...
In this paper, an effective solution for video-on-demand (VoD) streaming services based on BitTorrent mechanism is present. In this solution, several modifications have been incorporated into BitTorrent to support high quality streaming content delivery. First, pieces are selected based on the double windows algorithm instead of the rarest-first policy. Second, some neighbor peers are selected based...
The insulated gate bipolar transistor (IGBT) has been extensively used in all kinds of power electronics devices. But for a long time, the absence of effective methods for its parameters extraction limited the employment of simulator models, which also restricted the development of device application level. Base excess carrier lifetime (Tau) is an important parameter for tail-current and on-state...
A role based hierarchical group awareness model (RHGAM) on the basis of the previous research was presented in this paper. Regarding role as the basis of the group cooperation, firstly RHGAM constructed a group cooperation environment (GCE), and then GCE was extended by group awareness content, awareness hierarchy, the task decomposition rule. The model divided the awareness information into four...
Role is an important concept in collaboration systems and CSCW systems especially in the aspect of group awareness. This paper proposes a new group awareness model based on role by the research of role in collaboration systems and the analysis of existing awareness models. In the new proposed model, the task is decomposed into activities in order to acquire the activity graph. Then the roles are extracted...
Internet provides us with explosive information and involves massive important and useful knowledge within the abundant Web resources. Search engines can be very convenient to help users access the information they need. Through the Website classification, it can be more efficient to retrieve information. Through Web page automatic categorization engine design and implementation, this paper improves...
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