After a comprehensive literature review and analysis, a unified cloud computing framework is proposed, which comprises MapReduce, a vertual machine, Hadoop distributed file system （HDFS）, Hbase, Hadoop, and virtuali...After a comprehensive literature review and analysis, a unified cloud computing framework is proposed, which comprises MapReduce, a vertual machine, Hadoop distributed file system （HDFS）, Hbase, Hadoop, and virtualization. This study also compares Microsoft, Trend Micro, and the proposed unified cloud computing architecture to show that the proposed unified framework of the cloud computing service model is comprehensive and appropriate for the current complexities of businesses. The findings of this study can contribute to the knowledge for academics and practitioners to understand, assess, and analyze a cloud computing service application.展开更多
实体关系抽取是构建大规模知识图谱和专业领域数据集的重要基础之一,为此提出了一种基于预训练大语言模型的实体关系抽取框架(entity relation extraction framework based on pre-trained large language model, PLLM-RE),并针对循环...实体关系抽取是构建大规模知识图谱和专业领域数据集的重要基础之一,为此提出了一种基于预训练大语言模型的实体关系抽取框架(entity relation extraction framework based on pre-trained large language model, PLLM-RE),并针对循环经济政策进行了实体关系抽取研究。基于所提出的PLLM-RE框架,首先使用RoBERTa模型进行循环经济政策文本的实体识别,然后选取基于Transformer的双向编码器表示(bidirectional encoder representation from Transformers, BERT)模型进行循环经济政策实体关系抽取研究,以构建该政策领域的知识图谱。研究结果表明,PLLM-RE框架在循环经济政策实体关系抽取任务上的性能优于对比模型BiLSTM-ATT、PCNN、BERT以及ALBERT,验证了所提框架在循环经济政策实体关系抽取任务上的适配性和优越性,为后续循环经济领域资源的信息挖掘和政策分析提供了新思路。展开更多
This paper is a continuation of our last paper [1] which describes the theory of Virt-BLP model. Based on Virt-BLP model,this paper implements a mandatory access control(MAC) framework applicable to multi-level securi...This paper is a continuation of our last paper [1] which describes the theory of Virt-BLP model. Based on Virt-BLP model,this paper implements a mandatory access control(MAC) framework applicable to multi-level security(MLS) in Xen. The Virt-BLP model is the theoretical basis of this MAC framework,and this MAC framework is the implementation of Virt-BLP model. Our last paper focuses on Virt-BLP model,while this paper concentrates on the design and implementation of MAC framework. For there is no MAC framework applicable to MLS in virtual machine system at present,our MAC framework fills the blank by applying Virt-BLP model to Xen,which is better than current researches to guarantee the security of communication between virtual machines(VMs) . The experimental results show that our MAC framework is effective to manage the communication between VMs.展开更多
This study seeks to investigate the variations associated with lane lateral locations and days of the week in the stochastic and dynamic transition of traffic regimes(DTTR).In the proposed analysis,hierarchical regres...This study seeks to investigate the variations associated with lane lateral locations and days of the week in the stochastic and dynamic transition of traffic regimes(DTTR).In the proposed analysis,hierarchical regression models fitted using Bayesian frameworks were used to calibrate the transition probabilities that describe the DTTR.Datasets of two sites on a freeway facility located in Jacksonville,Florida,were selected for the analysis.The traffic speed thresholds to define traffic regimes were estimated using the Gaussian mixture model(GMM).The GMM revealed that two and three regimes were adequate mixture components for estimating the traffic speed distributions for Site 1 and 2 datasets,respectively.The results of hierarchical regression models show that there is considerable evidence that there are heterogeneity characteristics in the DTTR associated with lateral lane locations.In particular,the hierarchical regressions reveal that the breakdown process is more affected by the variations compared to other evaluated transition processes with the estimated intra-class correlation(ICC)of about 73%.The transition from congestion on-set/dissolution(COD)to the congested regime is estimated with the highest ICC of 49.4%in the three-regime model,and the lowest ICC of 1%was observed on the transition from the congested to COD regime.On the other hand,different days of the week are not found to contribute to the variations(the highest ICC was 1.44%)on the DTTR.These findings can be used in developing effective congestion countermeasures,particularly in the application of intelligent transportation systems,such as dynamic lane-management strategies.展开更多
The scope of this paper is to provide an E2 Eperspective of health monitoring and management(HMM)and structural health mornitoring(SHM)as an integrated system element of an integrated system health monitoring and mana...The scope of this paper is to provide an E2 Eperspective of health monitoring and management(HMM)and structural health mornitoring(SHM)as an integrated system element of an integrated system health monitoring and management(ISHM)system.The paper will address two main topics:(1)The importance of a diagnostics and prognostic requirements specification to develop an innovative health monitoring and management system;(2)The certification of a health monitoring and management system aiming at a maintenance credit as an integral part of the maintenance strategies.The development of a maintenance program which is based on combinations of different types of strategies(preventive,condition-based maintenance(CBM)and corrective maintenance…)for different subsystems or components and structures of complex systems like an aircraft to achieve the most optimized solution in terms of availability,cost and safety/certification is a real challenge.The maintenance strategy must satisfy the technical-risk and cost feasibility of the maintenance program.展开更多
Responding to the increasingly heated discussion of environmental issues and the mounting concern about ecological degradation, the present thesis is to try formulating a comprehensive and specific theoretical model f...Responding to the increasingly heated discussion of environmental issues and the mounting concern about ecological degradation, the present thesis is to try formulating a comprehensive and specific theoretical model for exploring the ecological ide-ologies revealed in the online Chinese resort profiles. In this model, Fairclough's three-dimensional model draws upon the Subsystem of Appraisal Theory-Attitude as the specific analytical framework and the ecological philosophy in the scope of ecocriticism as the specific explanatory tool for the exploration of ecological ideologies in these texts. Thus, the present thesis finds a point where CDA, Appraisal Theory and Ecocriticism work together to conduct a discourse analysis, which not only broadens the theoretical scope of each, but makes these theories better serve the practical course of environment protection.展开更多
文摘After a comprehensive literature review and analysis, a unified cloud computing framework is proposed, which comprises MapReduce, a vertual machine, Hadoop distributed file system （HDFS）, Hbase, Hadoop, and virtualization. This study also compares Microsoft, Trend Micro, and the proposed unified cloud computing architecture to show that the proposed unified framework of the cloud computing service model is comprehensive and appropriate for the current complexities of businesses. The findings of this study can contribute to the knowledge for academics and practitioners to understand, assess, and analyze a cloud computing service application.
文摘实体关系抽取是构建大规模知识图谱和专业领域数据集的重要基础之一,为此提出了一种基于预训练大语言模型的实体关系抽取框架(entity relation extraction framework based on pre-trained large language model, PLLM-RE),并针对循环经济政策进行了实体关系抽取研究。基于所提出的PLLM-RE框架,首先使用RoBERTa模型进行循环经济政策文本的实体识别,然后选取基于Transformer的双向编码器表示(bidirectional encoder representation from Transformers, BERT)模型进行循环经济政策实体关系抽取研究,以构建该政策领域的知识图谱。研究结果表明,PLLM-RE框架在循环经济政策实体关系抽取任务上的性能优于对比模型BiLSTM-ATT、PCNN、BERT以及ALBERT,验证了所提框架在循环经济政策实体关系抽取任务上的适配性和优越性,为后续循环经济领域资源的信息挖掘和政策分析提供了新思路。
基金supported by National Key Basic Research and Development Plan (973 Plan) of China (No. 2007CB310900)National Natural Science Foundation of China (No. 90612018, 90715030 and 60970008)
文摘This paper is a continuation of our last paper [1] which describes the theory of Virt-BLP model. Based on Virt-BLP model,this paper implements a mandatory access control(MAC) framework applicable to multi-level security(MLS) in Xen. The Virt-BLP model is the theoretical basis of this MAC framework,and this MAC framework is the implementation of Virt-BLP model. Our last paper focuses on Virt-BLP model,while this paper concentrates on the design and implementation of MAC framework. For there is no MAC framework applicable to MLS in virtual machine system at present,our MAC framework fills the blank by applying Virt-BLP model to Xen,which is better than current researches to guarantee the security of communication between virtual machines(VMs) . The experimental results show that our MAC framework is effective to manage the communication between VMs.
文摘This study seeks to investigate the variations associated with lane lateral locations and days of the week in the stochastic and dynamic transition of traffic regimes(DTTR).In the proposed analysis,hierarchical regression models fitted using Bayesian frameworks were used to calibrate the transition probabilities that describe the DTTR.Datasets of two sites on a freeway facility located in Jacksonville,Florida,were selected for the analysis.The traffic speed thresholds to define traffic regimes were estimated using the Gaussian mixture model(GMM).The GMM revealed that two and three regimes were adequate mixture components for estimating the traffic speed distributions for Site 1 and 2 datasets,respectively.The results of hierarchical regression models show that there is considerable evidence that there are heterogeneity characteristics in the DTTR associated with lateral lane locations.In particular,the hierarchical regressions reveal that the breakdown process is more affected by the variations compared to other evaluated transition processes with the estimated intra-class correlation(ICC)of about 73%.The transition from congestion on-set/dissolution(COD)to the congested regime is estimated with the highest ICC of 49.4%in the three-regime model,and the lowest ICC of 1%was observed on the transition from the congested to COD regime.On the other hand,different days of the week are not found to contribute to the variations(the highest ICC was 1.44%)on the DTTR.These findings can be used in developing effective congestion countermeasures,particularly in the application of intelligent transportation systems,such as dynamic lane-management strategies.
文摘The scope of this paper is to provide an E2 Eperspective of health monitoring and management(HMM)and structural health mornitoring(SHM)as an integrated system element of an integrated system health monitoring and management(ISHM)system.The paper will address two main topics:(1)The importance of a diagnostics and prognostic requirements specification to develop an innovative health monitoring and management system;(2)The certification of a health monitoring and management system aiming at a maintenance credit as an integral part of the maintenance strategies.The development of a maintenance program which is based on combinations of different types of strategies(preventive,condition-based maintenance(CBM)and corrective maintenance…)for different subsystems or components and structures of complex systems like an aircraft to achieve the most optimized solution in terms of availability,cost and safety/certification is a real challenge.The maintenance strategy must satisfy the technical-risk and cost feasibility of the maintenance program.
文摘Responding to the increasingly heated discussion of environmental issues and the mounting concern about ecological degradation, the present thesis is to try formulating a comprehensive and specific theoretical model for exploring the ecological ide-ologies revealed in the online Chinese resort profiles. In this model, Fairclough's three-dimensional model draws upon the Subsystem of Appraisal Theory-Attitude as the specific analytical framework and the ecological philosophy in the scope of ecocriticism as the specific explanatory tool for the exploration of ecological ideologies in these texts. Thus, the present thesis finds a point where CDA, Appraisal Theory and Ecocriticism work together to conduct a discourse analysis, which not only broadens the theoretical scope of each, but makes these theories better serve the practical course of environment protection.
