共查询到20条相似文献，搜索用时 62 毫秒
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作为深受开发者青睐的主流大数据平台,Hadoop在数据的处理、分析及应用上拥有着其他平台不可比拟的优势。在介绍了大数据定义和Hadoop生态系统架构的基础上,分别对基于Hadoop提出的大数据存储、分析、管理、安全及应用等关键问题的解决方案进行了研究和综述。最后,对基于Hadoop的大数据平台的研究和应用发展方向进行了展望。 相似文献
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互联网的迅速发展产生了各种海量数据,快速有效处理海量数据是云计算的目标。Hadoop作为典型的云计算平台可高效处理海量数据。介绍了Hadoop相关概念,包括HDFS、MapReduce等众多子项目;阐述了Hadoop完全分布式平台搭建,包括环境配置、搭建方法等;通过数据处理实验验证了Hadoop分布式平台的有效性。 相似文献
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《赤峰学院学报(自然科学版)》2020,(2)
针对数据挖掘实践课程现状和实际教学效果,结合数据挖掘实践课程特点,在分析总结多种数据挖掘工具的基础上,设计了一种基于Hadoop的数据挖掘实践平台.架构在分布式计算平台Hadoop上的数据挖掘实践平台,克服了传统数据挖掘工具的种种问题,其能够支持数据挖掘的标准流程,处理TB级的海量数据用于实践挖掘,为数据挖掘基础实践提供了丰富的数据挖掘算法用于建模.同时,基于Hadoop的数据挖掘实践平台提供了灵活多样的应用开发接口,能够支持第三方软件商集成开发,快速构建大型海量数据挖掘的应用系统,完成综合数据挖掘应用的二次开发.基于Hadoop的数据挖掘实践平台,为数据挖掘实践与科研提供了海量数据处理能力的数据挖掘平台,激励学生以竞赛模式学习和完成数据挖掘实践,从而促进了学生创新实践能力的培养. 相似文献
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《实验室研究与探索》2015,(11):77-81
随着互联网技术的发展,数据量成爆炸性增长趋势,单机难以存储、组织和分析这些海量数据。面对单机难以处理海量数据的现状,建立分布式计算平台对于今后科研工作和实验教学具有重要的意义。就如何在实验室环境下搭建分布式计算平台做了详细说明并对hadoop和spark的性能进行比较,包括Hadoop和Spark集群的安装和部署,Spark集成开发环境的建立,同一组数据集在两个平台上进行Kmeans聚类的时间对比。对于建设分布式计算平台具有一定的指导意义。 相似文献
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聚类算法一直备受研究者青睐。随着信息技术和数据技术的发展,数据的种类和数量急剧增长,云计算平台Hadoop成为这些数据存储和处理的新平台,基于云计算平台Hadoop的聚类算法逐渐成为热门。针对数据挖掘中的聚类问题,依托云计算模式及Hadoop平台,研究了K-means算法,有效改变了现有算法的局限性。 相似文献
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Web2.0下的E-Learning变革:从单向传递到协同共享 总被引：3，自引：1，他引：2
随着互联网技术从Web1.0发展到Web2.0,E-learning也相应地从E-learning1.0进化到E-learning2.0。E-learning1.0下的教学方式主要体现为单向传递,E-learning2.0下的教学方式则发展和超越了E-learning1.0,更多体现为协同共享。两种教学方式在师生角色、知识管理和传播方式、职责分配、学习目标定义和成绩考核等方面都有质的不同。文章提出E-learning2.0将是单向传递与协同共享教学方式的融合,这个融合的过程不仅需要硬件上的升级,更需要人们思维模式上的转变。 相似文献
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信息社会是数据爆炸的时代,分布式并行计算在应对海量数据处理等大作业方面非常有效.Apache基金会下的Hadoop正是这样一个开源的分布式系统基础构架.首先介绍了Hadoop平台下作业的分布式运行机制,然后对Hadoop平台自带的3种任务调度器做分析和比较,最后在分析JobTracker类文件的基础上指出了创建自定义任务调度器所需完成的工作. 相似文献
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罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
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Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献
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Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F. 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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陈美曦 《山东教育学院学报》2008,23(2):103-107
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language. 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献
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YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex. 相似文献