54 research outputs found
Comparison analysis for classification algorithm in data mining and the study of model use
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Zhongguo ge min zu yuan shi zong jiao zi liao ji cheng, Elunchun zu juan, Ewenko zu juan, Hezhe zu juan, Dawoer zu juan, Xibo zu juan, Man zu juan, Menggu zu juan, Zang zu juan
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Multi-agent Coordination Based On Contract Net Protocol
No full textIn multi-agent system, agents need autonomy and collaboration to accomplish a complex task. Contract net protocol (CNP) is coordination mechanism often used in a multi-agent system. Due to the limitations inherent in the conventional CNP, this paper proposes a Norm-based CNP to improve the efficiency and effectiveness of the coordination processes in a multi-agent system. First, a three-dimensional taxonomy of norm is put forward in terms of the hierarchy, type and flexibility of norms. Then a coordination process guided by Norm-based CNP is developed under the taxonomy framework. The new coordination process consists of two principal stages and five sub-divided phases, providing a feasible solution for the optimization of the candidate selection. The merits of dividing the process into two stages are converging coordination process as soon as possible and controlling whole system effectively. In collaborative process, norms ensure to achieve global performance and agents pursuing maximal local performance to achieve satisfied result. Finally a case study is performed to illustrate the real application of the proposed approach.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000273591400089&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Computer Science, Artificial IntelligenceEngineering, Electrical & ElectronicEICPCI-S(ISTP)
Simultaneous propagation of multiple hydraulic fractures in crystalline rock: A numerical investigation based on coupled fluid-solid discrete element framework
No full textThe simultaneous multiple hydraulic fracturing treatment has been extensively employed in Enhanced geothermal systems (EGS) to increase the complexity and area of artificial fractures. However, the interaction between hydraulic fractures (stress shadowing effect) often occurs, leading to unpredictable fracture paths and unsatisfactory production outcomes. In order to investigate the mechanism behind the stress shadowing during simultaneous multiple hydraulic fracturing in crystalline rock, this study proposes a Hydro-Grain-Texture Model based on discrete element method that can consider the effects of mineral heterogeneity and pre-existing microcrack anisotropy. The results demonstrate that the simultaneous multiple hydraulic fracturing results in crystalline rock are influenced collectively by the confining stress, injection point spacing, mineral heterogeneity, and microcracks anisotropy. Due to the lower strength of grain boundaries, hydraulic fractures are more prone to deflect along these boundaries under the influence of the stress shadowing effect during their propagation. Conversely, when the orientation of pre-existing microcracks is approximately parallel to the direction of hydraulic fracture propagation, their capturing effect can facilitate the ability of hydraulic fractures to overcome the stress shadow effect
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