A smartphone-based context-aware augmentative and alternative communication(AAC) was applied was in order to enhance the user's experience by providing simple, adaptive, and intuitive interfaces. Various potential...A smartphone-based context-aware augmentative and alternative communication(AAC) was applied was in order to enhance the user's experience by providing simple, adaptive, and intuitive interfaces. Various potential context-aware technologies and AAC usage scenarios were studied, and an efficient communication system was developed by combining smartphone's multimedia functions and its optimized sensor technologies. The experimental results show that context-awareness accuracy is achieved up to 97%.展开更多
For the pre-acquired serial images from camera lengthways motion, a view synthesis algorithm based on epipolar geometry constraint is proposed in this paper. It uses the whole matching and maintaining order characters...For the pre-acquired serial images from camera lengthways motion, a view synthesis algorithm based on epipolar geometry constraint is proposed in this paper. It uses the whole matching and maintaining order characters of the epipolar line, Fourier transform and dynamic programming matching theories, thus truly synthesizing the destination image of current viewpoint. Through the combination of Fourier transform, epipolar geometry constraint and dynamic programming matching, the circumference distortion problem resulting from conventional view synthesis approaches is effectively avoided. The detailed implementation steps of this algorithm are given, and some running instances are presented to illustrate the results.展开更多
Role based access control is one of the widely used access control models.There are investigations in the literature that use knowledge representation mechanisms such as formal concept analysis(FCA),description logics...Role based access control is one of the widely used access control models.There are investigations in the literature that use knowledge representation mechanisms such as formal concept analysis(FCA),description logics,and Ontology for representing access control mechanism.However,while using FCA,investigations reported in the literature so far work on the logic that transforms the three dimensional access control matrix into dyadic formal contexts.This transformation is mainly to derive the formal concepts,lattice structure and implications to represent role hierarchy and constraints of RBAC.In this work,we propose a methodology that models RBAC using triadic FCA without transforming the triadic access control matrix into dyadic formal contexts.Our discussion is on two lines of inquiry.We present how triadic FCA can provide a suitable representation of RBAC policy and we demonstrate how this representation follows role hierarchy and constraints of RBAC on sample healthcare network available in the literature.展开更多
The contemporary environment within which command,control,communications,computers and intelligence (C4I platforms exist, have a number of characteristics. These characteristics may be most obviously identified as int...The contemporary environment within which command,control,communications,computers and intelligence (C4I platforms exist, have a number of characteristics. These characteristics may be most obviously identified as interconnectivity, international networking, speed of data transfer, the compact nature of electronic information and rapidly changing technology. Information security professionals employ a variety of approaches in order to counter risks within this complex and fluid environment. The gamut of potential security activities ranges form access control through a variety of auditing techniques to secure data communications. This field is broad and well documented. Indeed, the discipline of network risk management and data security is both well developed and sophisticated.This paper addresses twin themes:i.The fundamental issue of the method by which specific approaches are employed. This is a precursor to the adoption of an eventual strategy.ii.The crucial issues revolving around the展开更多
针对基于深度学习的多视图立体(Multi-view Stereo,MVS)重建算法仍然存在图像特征提取不全面、代价体匹配模糊以及深度误差不断积累而导致在无纹理和重复纹理区域重建效果差的问题,提出了基于上下文引导的代价体构建和深度细化的级联MV...针对基于深度学习的多视图立体(Multi-view Stereo,MVS)重建算法仍然存在图像特征提取不全面、代价体匹配模糊以及深度误差不断积累而导致在无纹理和重复纹理区域重建效果差的问题,提出了基于上下文引导的代价体构建和深度细化的级联MVS网络。首先,利用基于无参注意力的特征融合模块过滤无用特征并通过特征融合来解决多尺度特征不一致的问题;然后,利用基于上下文引导的代价体模块融合全局信息来提高代价体匹配的完整性和鲁棒性;最后,利用深度细化模块学习深度残差来提升低分辨下深度图的准确性。实验结果表明,在DTU数据集上,该网络相比MVSNet完整度误差减小了24.4%,准确度误差减小了4.1%,整体误差减小了14.3%,其在Tanks and Temples数据集上性能也优于大多数算法,展现出强大的竞争力。展开更多
如何通过数字化转型实践获取组织合法性正成为理论和实践关注的热点议题。基于注意力基础观视角,提出从首席数字官职位权力(Chief Digital Officer Position Power,CDOPP)到组织合法性的组织数字化转型注意力“投入-产出”分析框架。结...如何通过数字化转型实践获取组织合法性正成为理论和实践关注的热点议题。基于注意力基础观视角,提出从首席数字官职位权力(Chief Digital Officer Position Power,CDOPP)到组织合法性的组织数字化转型注意力“投入-产出”分析框架。结果表明:CDOPP对组织合法性有显著正向影响;数字导向在CDOPP与组织合法性关系中存在中介作用;沟通质量正向调节了CDOPP对数字导向的正向影响以及CDOPP通过数字导向影响组织合法性的间接效应。探索了数字化转型过程中组织合法性形成机理,具有重要理论及实践价值。展开更多
基金Project supported by the Changwon National University(2013-2014),Korea
文摘A smartphone-based context-aware augmentative and alternative communication(AAC) was applied was in order to enhance the user's experience by providing simple, adaptive, and intuitive interfaces. Various potential context-aware technologies and AAC usage scenarios were studied, and an efficient communication system was developed by combining smartphone's multimedia functions and its optimized sensor technologies. The experimental results show that context-awareness accuracy is achieved up to 97%.
文摘For the pre-acquired serial images from camera lengthways motion, a view synthesis algorithm based on epipolar geometry constraint is proposed in this paper. It uses the whole matching and maintaining order characters of the epipolar line, Fourier transform and dynamic programming matching theories, thus truly synthesizing the destination image of current viewpoint. Through the combination of Fourier transform, epipolar geometry constraint and dynamic programming matching, the circumference distortion problem resulting from conventional view synthesis approaches is effectively avoided. The detailed implementation steps of this algorithm are given, and some running instances are presented to illustrate the results.
基金the financial support from Department of Science and Technology,Government of India under the grant:SR/CSRI/118/2014
文摘Role based access control is one of the widely used access control models.There are investigations in the literature that use knowledge representation mechanisms such as formal concept analysis(FCA),description logics,and Ontology for representing access control mechanism.However,while using FCA,investigations reported in the literature so far work on the logic that transforms the three dimensional access control matrix into dyadic formal contexts.This transformation is mainly to derive the formal concepts,lattice structure and implications to represent role hierarchy and constraints of RBAC.In this work,we propose a methodology that models RBAC using triadic FCA without transforming the triadic access control matrix into dyadic formal contexts.Our discussion is on two lines of inquiry.We present how triadic FCA can provide a suitable representation of RBAC policy and we demonstrate how this representation follows role hierarchy and constraints of RBAC on sample healthcare network available in the literature.
文摘The contemporary environment within which command,control,communications,computers and intelligence (C4I platforms exist, have a number of characteristics. These characteristics may be most obviously identified as interconnectivity, international networking, speed of data transfer, the compact nature of electronic information and rapidly changing technology. Information security professionals employ a variety of approaches in order to counter risks within this complex and fluid environment. The gamut of potential security activities ranges form access control through a variety of auditing techniques to secure data communications. This field is broad and well documented. Indeed, the discipline of network risk management and data security is both well developed and sophisticated.This paper addresses twin themes:i.The fundamental issue of the method by which specific approaches are employed. This is a precursor to the adoption of an eventual strategy.ii.The crucial issues revolving around the
文摘针对基于深度学习的多视图立体(Multi-view Stereo,MVS)重建算法仍然存在图像特征提取不全面、代价体匹配模糊以及深度误差不断积累而导致在无纹理和重复纹理区域重建效果差的问题,提出了基于上下文引导的代价体构建和深度细化的级联MVS网络。首先,利用基于无参注意力的特征融合模块过滤无用特征并通过特征融合来解决多尺度特征不一致的问题;然后,利用基于上下文引导的代价体模块融合全局信息来提高代价体匹配的完整性和鲁棒性;最后,利用深度细化模块学习深度残差来提升低分辨下深度图的准确性。实验结果表明,在DTU数据集上,该网络相比MVSNet完整度误差减小了24.4%,准确度误差减小了4.1%,整体误差减小了14.3%,其在Tanks and Temples数据集上性能也优于大多数算法,展现出强大的竞争力。
文摘如何通过数字化转型实践获取组织合法性正成为理论和实践关注的热点议题。基于注意力基础观视角,提出从首席数字官职位权力(Chief Digital Officer Position Power,CDOPP)到组织合法性的组织数字化转型注意力“投入-产出”分析框架。结果表明:CDOPP对组织合法性有显著正向影响;数字导向在CDOPP与组织合法性关系中存在中介作用;沟通质量正向调节了CDOPP对数字导向的正向影响以及CDOPP通过数字导向影响组织合法性的间接效应。探索了数字化转型过程中组织合法性形成机理,具有重要理论及实践价值。
