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Mining sequential patterns is an important research issue in data mining and knowledge discovery with broad applications. However, the existing sequential pattern mining approaches consider only binary frequency values of items in sequences and equal importance/significance values of distinct items. Therefore, they are not applicable to actually represent many real‐world scenarios. In this paper, we propose a novel framework for mining high‐utility sequential patterns for more real‐life applicable information extraction from sequence databases with non‐binary frequency values of items in sequences and different importance/significance values for distinct items. Moreover, for mining high‐utility sequential patterns, we propose two new algorithms: UtilityLevel is a high‐utility sequential pattern mining with a level‐wise candidate generation approach, and UtilitySpan is a high‐utility sequential pattern mining with a pattern growth approach. Extensive performance analyses show that our algorithms are very efficient and scalable for mining high‐utility sequential patterns. 相似文献
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时序数据库中部分周期模式的挖掘算法研究 总被引:1,自引:0,他引:1
时序数据库中关联规则或模式的出现通常会呈现一定的周期性,部分周期模式的挖掘是数据挖掘领域一个崭新的问题。首先介绍了部分周期模式的研究背景及相关概念,然后给出了现有的挖掘算法并对其进行分析比较,最后简述了在四川省智能交通系统中,应用部分周期模式的挖掘算法来分析交通流量及IC卡盈缺数量周期模式的KDD系统。 相似文献
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大数据下的空间数据挖掘思考 总被引:1,自引:0,他引:1
对大数据背景下思考空间数据挖掘,分析了空间数据在大数据中的基础地位,综述了国际学术界、企业界和政界对大数据的关注;分析了空间大数据面临的垃圾多、污染重、利用难的现状,剖析了空间大数据蕴含的价值;探讨了从空间大数据中挖掘知识的技术,以及知识变为数据智能的途径。 相似文献
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Muhammad Aamir Saleem Young-Koo Lee Sungyoung Lee 《Wireless Personal Communications》2014,76(4):747-762
Pervasiveness of location acquisition technologies such as GPS, GSM, and Wi-Fi open the doors to use these technologies for ease and advancement of the society. One of the most emerging uses of these technologies is the low cost yet effective way of tracking of moving objects for activity monitoring. Daily lives of humans consist of enormous outdoor/trajectory activities like visiting different places for conducting routine task (e.g., Office, Restaurant, and Sports Club etc.). These activities put a significant effect in regulation of human life (i.e. health care and life care). By analyzing these activity traces and directing an effective routine of accomplishment of tasks can sufficiently improve its impact on human life. In this paper, we propose Daily Activity Monitor and LifeCare Provisioner (DALP) which is a GPS based outdoor activities analysis system for user monitoring and lifecare provisioning. To achieve real time and accurate outcome in tracking movement activities, we have proposed an approach of Personal tracking using static trajectory locations. DALP tracks the complete movement activity of a user and shares it with practitioners/instructors for analysis and updated recommendations. To verify and validate the working of DALP, a proof of concept prototype has been implemented that reflects its complete working. 相似文献
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开发了一个基于云计算的并行分布式大数据挖掘平台——PDMiner.PDMiner实现了各种并行数据挖掘算法,如数据预处理、关联规则分析以及分类、聚类等算法.实验结果表明,并行分布式数据挖掘平台PDMiner中实现的并行算法,能够处理大规模数据集,达到太字节级;具有很好的加速比性能;实现的并行算法可以在商用机器构建的并行平台上稳定运行,整合了已有的计算资源,提高了计算资源的利用效率;可以有效地应用到实际海量数据挖掘中.在PDMiner中还开发了工作流子系统,提供友好统一的接口界面方便用户定义数据挖掘任务. 相似文献
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将人工智能技术应用到互联网大数据挖掘算法中,可以利用互联网大数据进行准确的定位和分析,为企业提供更精准的用户行为信息。文中阐述了基于人工智能技术的大数据挖掘算法,然后分析了在互联网大数据挖掘算法中应用人工智能技术的重要性,最后说明了人工智能技术在互联网大数据挖掘算法中的具体应用,以期为用户提供更精准的网络服务,从而使用户获得更加满意、便捷、安全的服务体验。 相似文献
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对电子商务网站的用户访问模式挖掘的方法和模式的应用做了系统的论述。在数据的预处理技术方面.提出了新的框架过滤算法、识别搜索引擎Robot产生的访问记录的技术和会话子序列生成算法,并就站点性能改善、个性化服务、实现商业智能三方面的应用对用户访问模式的挖掘做了探讨,最后给出了从语义上理解和挖掘用户访问行为的方法。 相似文献
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在信息时代的背景下,数据信息的价值不断上涨,各类网络病毒与黑客攻击成为许多不法分子的牟利手段,对用户的信息财产及隐私都产生了很大的影响。大数据挖掘技术作为时代的前沿技术,对加强网络系统安全性有着极为重要的作用。基于此,文中从实际情况出发,阐述了大数据挖掘技术与网络病毒防御的相关内容,对计算机网络安全的现状进行了分析,并有针对性地提出了大数据挖掘技术在网络安全中的应用,希望能为网络安全工作提供参考与帮助。 相似文献
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Ching-Huang Yun Ming-Syan Chen 《IEEE transactions on systems, man and cybernetics. Part C, Applications and reviews》2007,37(2):278-295
In this paper, we explore a new data mining capability for a mobile commerce environment. To better reflect the customer usage patterns in the mobile commerce environment, we propose an innovative mining model, called mining mobile sequential patterns, which takes both the moving patterns and purchase patterns of customers into consideration. How to strike a compromise among the use of various knowledge to solve the mining on mobile sequential patterns is a challenging issue. We devise three algorithms (algorithm TJLS, algorithm TJPT, and algorithm TJPF) for determining the frequent sequential patterns, which are termed large sequential patterns in this paper, from the mobile transaction sequences. Algorithm TJLS is devised in light of the concept of association rules and is used as the basic scheme. Algorithm TJPT is devised by taking both the concepts of association rules and path traversal patterns into consideration and gains performance improvement by path trimming. Algorithm TJPF is devised by utilizing the pattern family technique which is developed to exploit the relationship between moving and purchase behaviors, and thus is able to generate the large sequential patterns very efficiently. A simulation model for the mobile commerce environment is developed, and a synthetic workload is generated for performance studies. In mining mobile sequential patterns, it is shown by our experimental results that algorithm TJPF significantly outperforms others in both execution efficiency and memory saving, indicating the usefulness of the pattern family technique devised in this paper. It is shown by our results that by taking both moving and purchase patterns into consideration, one can have a better model for a mobile commerce system and is thus able to exploit the intrinsic relationship between these two important factors for the efficient mining of mobile sequential patterns 相似文献
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现有信任网络研究大多侧重于信任的推理及聚合计算,缺乏对实体重要性及其关联性分析,为此该文提出一种多维信任序列模式(Multi-dimensional Trust Sequential Patterns, MTSP)挖掘算法。该算法包括频繁信任序列挖掘和多维模式筛选两个处理过程,综合考虑信任强度、路径长度和实体可信度等多维度因素,有效地挖掘出信任网络中的频繁多维信任序列所包含的重要实体及其关联结构。仿真实验表明该文所提MTSP算法的挖掘结果全面、准确地反映了信任网络中重要信任实体关联性及其序列结构特征。 相似文献
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时态空间中时态序列模式的数据挖掘 总被引:2,自引:2,他引:0
时态数据挖掘是目前数据挖掘领域的研究热点。与其它相关研究不同,文章致力于利用时态序列模式挖掘进行预测与决策。首先介绍了时态类型的分类;然后定义了一个新的时态空间模型,用以描述基于不同时态类型、不同属性的各个不同对象的状态,并且为高效地进行预测与决策提供支持;最后,给出了时态空间模型中数据挖掘的四种时态序列模式,对时态数据挖掘的研究具有重要意义。 相似文献
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随着铁路信息化的发展,铁路各业务部门产生了大量的基础数据,这些数据是铁路生产管理和经营决策所需的宝贵的数据资源,也是科研工作所需的重要参考资料。如今,大数据时代正式到来,数据从简单的处理对象开始转变为一种基础性资源,如何更好地进行数据分析和利用大数据挖掘技术为铁路系统服务已经成为研究热点。针对大数据挖掘技术在铁路系统应用进行了前景展望和规划,同时提出了一种基于大数据挖掘的GSM-R网络状态综合检测系统,期望能在利用大数据为铁路信息化建设方面进行更深的探索。 相似文献
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提出一种多时间间隔的序列模式挖掘算法,依据挖掘的实际情况设置可变的时间区间,采用有效的剪枝策略,分区间精确显示多时间间隔序列模式挖掘结果.实验证明,算法具有较高的挖掘性能. 相似文献