Based on forbidden patterns in symbolic dynamics, symbolic subsequences are classified and relations between forbidden patterns, correlation dimensions and complexity measures are studied. A complexity measure approac...Based on forbidden patterns in symbolic dynamics, symbolic subsequences are classified and relations between forbidden patterns, correlation dimensions and complexity measures are studied. A complexity measure approach is proposed in order to separate deterministic （usually chaotic） series from random ones and measure the complexities of different dynamic systems. The complexity is related to the correlation dimensions, and the algorithm is simple and suitable for time series with noise. In the paper, the complexity measure method is used to study dynamic systems of the Logistic map and the Henon map with multi-parameters.展开更多
首先,设计了节点自适应传感半径调整算法(AASR,adaptive adjustment of sensing radius),通过节点自适应选择最佳的覆盖范围,有效地进行节点覆盖控制,减少节点能量虚耗,提高覆盖效率。其次,从调整效果、能量消耗和覆盖冗余度3个方面对...首先,设计了节点自适应传感半径调整算法(AASR,adaptive adjustment of sensing radius),通过节点自适应选择最佳的覆盖范围,有效地进行节点覆盖控制,减少节点能量虚耗,提高覆盖效率。其次,从调整效果、能量消耗和覆盖冗余度3个方面对节点自适应传感半径调整算法进行了模拟实验和分析。仿真结果表明,AASR能够有效提高节点生存时间,减少能量消耗,提高覆盖率。展开更多
学术数据的激增出现信息过载现象,对科研用户造成一定的负担,研究学者推荐能够提高科研效率,便于顺利开展科学研究。本文构建了一种基于组合相似度计算的个性化学者推荐模型,组合相似度计算包括基于学者特征词相似度计算和基于学者共被...学术数据的激增出现信息过载现象,对科研用户造成一定的负担,研究学者推荐能够提高科研效率,便于顺利开展科学研究。本文构建了一种基于组合相似度计算的个性化学者推荐模型,组合相似度计算包括基于学者特征词相似度计算和基于学者共被引相似度计算。前者考虑的是学者基于研究内容的相似性,而后者考虑的是学者基于共被引关系的相似性。同时,以CSSCI(Chinese Social Sciences Citation Index)数据库和CNKI(China National Knowl‐edge Infrastructure)中的数据进行模型验证,并且利用精确率、召回率和F值进行推荐效果评测。实验结果表明,本文提出的推荐模型取得了较好的结果,即能为目标学者推荐研究兴趣相似的学者,促进学术沟通。展开更多
基金Project supported by the National Natural Science Foundation of China (Grant No.10871168)
文摘Based on forbidden patterns in symbolic dynamics, symbolic subsequences are classified and relations between forbidden patterns, correlation dimensions and complexity measures are studied. A complexity measure approach is proposed in order to separate deterministic （usually chaotic） series from random ones and measure the complexities of different dynamic systems. The complexity is related to the correlation dimensions, and the algorithm is simple and suitable for time series with noise. In the paper, the complexity measure method is used to study dynamic systems of the Logistic map and the Henon map with multi-parameters.
文摘首先,设计了节点自适应传感半径调整算法(AASR,adaptive adjustment of sensing radius),通过节点自适应选择最佳的覆盖范围,有效地进行节点覆盖控制,减少节点能量虚耗,提高覆盖效率。其次,从调整效果、能量消耗和覆盖冗余度3个方面对节点自适应传感半径调整算法进行了模拟实验和分析。仿真结果表明,AASR能够有效提高节点生存时间,减少能量消耗,提高覆盖率。
文摘学术数据的激增出现信息过载现象,对科研用户造成一定的负担,研究学者推荐能够提高科研效率,便于顺利开展科学研究。本文构建了一种基于组合相似度计算的个性化学者推荐模型,组合相似度计算包括基于学者特征词相似度计算和基于学者共被引相似度计算。前者考虑的是学者基于研究内容的相似性,而后者考虑的是学者基于共被引关系的相似性。同时,以CSSCI(Chinese Social Sciences Citation Index)数据库和CNKI(China National Knowl‐edge Infrastructure)中的数据进行模型验证,并且利用精确率、召回率和F值进行推荐效果评测。实验结果表明,本文提出的推荐模型取得了较好的结果,即能为目标学者推荐研究兴趣相似的学者,促进学术沟通。
