Rough set theory is relativly new to area of soft computing to handle the uncertain big data efficiently. It also provides a powerful way to calculate the importance degree of vague and uncertain big data to help in d...Rough set theory is relativly new to area of soft computing to handle the uncertain big data efficiently. It also provides a powerful way to calculate the importance degree of vague and uncertain big data to help in decision making. Risk assessment is very important for safe and reliable investment. Risk management involves assessing the risk sources and designing strategies and procedures to mitigate those risks to an acceptable level. In this paper, we emphasize on classification of different types of risk factors and find a simple and effective way to calculate the risk exposure.. The study uses rough set method to classify and judge the safety attributes related to investment policy. The method which based on intelligent knowledge accusation provides an innovative way for risk analysis. From this approach, we are able to calculate the significance of each factor and relative risk exposure based on the original data without assigning the weight subjectively.展开更多
针对在大数据的处理过程中,对大数据任务的划分和资源分配缺乏合理性的问题,提出一种面向大数据任务的调度方法。该方法首先引入了调度理论用于处理大数据任务,帮助建立合理的大数据任务管理体系并规范大数据任务处理流程;然后,基于大...针对在大数据的处理过程中,对大数据任务的划分和资源分配缺乏合理性的问题,提出一种面向大数据任务的调度方法。该方法首先引入了调度理论用于处理大数据任务,帮助建立合理的大数据任务管理体系并规范大数据任务处理流程;然后,基于大数据任务的本质对数据集进行分析处理,引入决策表进行属性约简,以减小大数据分析任务的数据量和提高大数据分析效率;最后,采用模糊综合评价方法,将模糊综合评价的结果作为对任务调度的依据,以提高任务资源分配合理性。在UCI(University of California Irvine)数据集上进行测试,实验结果表明,该调度算法在平均预测准确度上比朴素贝叶斯(NB)算法高7.42个百分点,比误差反向传播(BP)算法高5.16个百分点,比均方根传递(RMSProp)算法高3.74个百分点。而对于特征数较多的数据集,所提算法在预测精度上较其他算法有显著提高。所提算法在平均调度长度比(SLR)上较HCPFS(Heterogeneous Critcal Path First Synthesis)算法和HIPLTS(Heterogeneous Improved Priority List for Task Scheduling)算法分别下降了12.14%和4.56%,在平均加速比上分别提升了7.14%和42.56%,表明该算法能有效提高大数据系统中任务调度的效率。综合比较分析,所提方法具有较高的预测精度,且高效可靠。展开更多
文摘Rough set theory is relativly new to area of soft computing to handle the uncertain big data efficiently. It also provides a powerful way to calculate the importance degree of vague and uncertain big data to help in decision making. Risk assessment is very important for safe and reliable investment. Risk management involves assessing the risk sources and designing strategies and procedures to mitigate those risks to an acceptable level. In this paper, we emphasize on classification of different types of risk factors and find a simple and effective way to calculate the risk exposure.. The study uses rough set method to classify and judge the safety attributes related to investment policy. The method which based on intelligent knowledge accusation provides an innovative way for risk analysis. From this approach, we are able to calculate the significance of each factor and relative risk exposure based on the original data without assigning the weight subjectively.
文摘针对在大数据的处理过程中,对大数据任务的划分和资源分配缺乏合理性的问题,提出一种面向大数据任务的调度方法。该方法首先引入了调度理论用于处理大数据任务,帮助建立合理的大数据任务管理体系并规范大数据任务处理流程;然后,基于大数据任务的本质对数据集进行分析处理,引入决策表进行属性约简,以减小大数据分析任务的数据量和提高大数据分析效率;最后,采用模糊综合评价方法,将模糊综合评价的结果作为对任务调度的依据,以提高任务资源分配合理性。在UCI(University of California Irvine)数据集上进行测试,实验结果表明,该调度算法在平均预测准确度上比朴素贝叶斯(NB)算法高7.42个百分点,比误差反向传播(BP)算法高5.16个百分点,比均方根传递(RMSProp)算法高3.74个百分点。而对于特征数较多的数据集,所提算法在预测精度上较其他算法有显著提高。所提算法在平均调度长度比(SLR)上较HCPFS(Heterogeneous Critcal Path First Synthesis)算法和HIPLTS(Heterogeneous Improved Priority List for Task Scheduling)算法分别下降了12.14%和4.56%,在平均加速比上分别提升了7.14%和42.56%,表明该算法能有效提高大数据系统中任务调度的效率。综合比较分析,所提方法具有较高的预测精度,且高效可靠。