7 research outputs found
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The Application of the Ant Colony Decision Rule Algorithm on Distributed Data Mining
Based on the deep research of Ant Colony Algorithm, an Ant Colony decision rule Algorithm is proposed for rules mining based on the thought of ant colony and rule mining of decision tree. Then the algorithm is compared with C4.5 and applied on the rules mining and the results are showed by simulation
International Undergraduate Students in Chinese Higher Education: An Engagement Typology and Associated Factors
This research adopted a typological approach to explore international students' academic engagement in China. Using data generated by a survey study involving 801 international undergraduate students at 34 full-time Chinese universities, this research developed an international student engagement typology, and examined important individual and learning environment factors associated with the engagement types presented in the typology. The international student engagement typology helps to understand and enhance international undergraduate students' learning experiences in Chinese HEIs. Although located in China, this research holds implications for practitioners in broader contexts striving for the sustainable development of international student education
Porous N‑Doped Carbon Prepared from Triazine-Based Polypyrrole Network: A Highly Efficient Metal-Free Catalyst for Oxygen Reduction Reaction in Alkaline Electrolytes
Metal-free N-doped carbon (NC) materials
have been regarded as one of the most promising catalysts for the
oxygen reduction reaction (ORR) in alkaline media because of their
outstanding ORR catalytic activity, high stability, and good methanol
tolerance. Up to now, only a small minority of such catalysts have
been synthesized from triazine-based polymeric networks. Herein, we
report the synthesis of such NC catalyst by directly pyrolyzing a
nitrogen-rich, triazine-based polypyrrole network (TPN). The TPN is
fabricated by oxidative polymerization of 2,4,6-tripyrrol-1,3,5-triazine
monomer using TfOH as the protonating agent and benzoyl peroxide as
the oxidizing agent. The obtained NC-900 (pyrolyzed at 900 °C)
catalyst exhibits excellent ORR activity in alkaline media with a
high ORR onset potential (0.972 V vs RHE), a large kinetic-limiting
current density (15.66 mA cm<sup>–2</sup> at 0.60 V), and good
MeOH tolerance and durability. The as-synthesized NC-900 material
is a potential candidate as a highly active, stable, and low-cost
ORR catalyst for alkaline fuel cells