检索结果-内蒙古大学图书馆

2011 International Conference on Computational and Information Sciences, ICCIS 2011

作者： Fan, Beibei Liang, Xiaoyan Luo, Yang Bo, Yang Xia, Chunhe State Key Laboratory of Virtual Reality Technology and System School of Computer Science and Engineering Beihang University Beijing China

ISBN: (纸本)9780769545011

Cross-domain interoperation based on role-mapping increasingly becomes a representative research field of collaborative environment. However, in this collaborative environment, there would still be more permission or less than the role of role-mapping policy required when authorization, this situation can not be completely avoided. This disaccord will result in conflict of access control policies (ACPs) in collaborative domains, and ultimately lead to unauthorized access to resources in autonomy domains. A new method is presented to detect the conflict between access control policies in collaborative environment automatically. The ACPs conflict detection model (ACPCDM) is established, the termination of ACPCDM is proved by the putdown automation, and the prototype system is implemented. At last, we validate the validity of this method with experiments, the result of the experiments shows that the analysis report of conflict can not only detect if there is conflict, but also figure out the conflict type, the causes and location of the conflict. So it is much easier for administer in each domain to resolve the conflict. © 2011 IEEE.

关键词： Mapping

来源：评论

学校读者我要写书评

暂无评论

RGB-D Salient Object Detection with Ubiquitous Target Awareness

RGB-D Salient Object Detection with Ubiquitous Target Awaren...

引用

作者： Zhao, Yifan Zhao, Jiawei Li, Jia Chen, Xiaowu State Key Laboratory of Virtual Reality Technology and Systems School of Computer Science and Engineering Beihang University Beijing China

Conventional RGB-D salient object detection methods aim to leverage depth as complementary information to find the salient regions in both modalities. However, the salient object detection results heavily rely on the quality of captured depth data which sometimes are unavailable. In this work, we make the first attempt to solve the RGB-D salient object detection problem with a novel depth-awareness framework. This framework only relies on RGB data in the testing phase, utilizing captured depth data as supervision for representation learning. To construct our framework as well as achieving accurate salient detection results, we propose a Ubiquitous Target Awareness (UTA) network to solve three important challenges in RGB-D SOD task: 1) a depth awareness module to excavate depth information and to mine ambiguous regions via adaptive depth-error weights, 2) a spatial-aware cross-modal interaction and a channel-aware cross-level interaction, exploiting the low-level boundary cues and amplifying high-level salient channels, and 3) a gated multi-scale predictor module to perceive the object saliency in different contextual scales. Besides its high performance, our proposed UTA network is depth-free for inference and runs in real-time with 43 FPS. Experimental evidence demonstrates that our proposed network not only surpasses the state-of-the-art methods on five public RGB-D SOD benchmarks by a large margin, but also verifies its extensibility on five public RGB SOD benchmarks. © 1992-2012 IEEE.

关键词： Object detection

来源：评论

学校读者我要写书评

暂无评论

A Chinese character component recognition method based on optimal combined strategy

A Chinese character component recognition method based on op...

引用

IEEE International Conference on computer and Communications, ICCC 2015

作者： Bao, Yongtang Qi, Yue Liu, Min State Key Laboratory of Virtual Reality Technology and Systems School of Computer Science and Engineering Beihang University Beijing China

ISBN: (纸本)9781467381253

Chinese character component recognition plays an important role in Chinese character studying process. In this digital age, using the technology of computer science to analyzing Chinese character component, has a very important significance for the development of traditional culture. In this paper, we propose an optimal combined strategy based method for component recognition. First, we execute preprocessing for all input images. For each image, we process it with image binaryzation and homogenization. Second, we generate the candidate strokes from the results of preprocessing step. Third, we construct the search graph and calculate the possible solution for searching component. Finally, we describe the detailed algorithm for component recognition using optimal combined strategy. Our method can produce accurate Chinese character component recognition results. © 2015 IEEE.

关键词： Chinese character component recognition optimal combined strategy

来源：评论

学校读者我要写书评

暂无评论

Wireless spectrum prediction model based on time series analysis method

Wireless spectrum prediction model based on time series anal...

引用

2009 ACM Workshop on Cognitive Radio Networks, CoRoNet'09, Co-located with the Mobile Computing and Networking Conference, MobiCom'09

作者： Su, Jinzhao Wu, Wei State Key Laboratory of Virtual Reality Technology and Systems School of Computer Science BeiJing University of Aeronautics and Astronautics China

ISBN: (纸本)9781605587387

Cognitive Radio (CR) is considered to be a solution for mitigating the conflict between limited spectrum resources and increasing demand of various applications. For the purpose of guaranteeing primary users, we propose a spectrum prediction model using the spectrum historic utilization information with time series analysis. We conduct experiment on wide TV bands of China from 603.25 MHzt o 843.25 MHz, the results show that this model can accurately predict status of channels and find vacant spectrum for cognitive users. We take channel 2 whose center frequency locates in 615.25 MHzfor example, average forecasting error ratio is 1.01% with a minimum of 0.79%. Copyright 2009 ACM.

关键词： Cognitive radio

来源：评论

学校读者我要写书评

暂无评论

Image based experiment scene builder for virtual educational experiments

Image based experiment scene builder for virtual educational...

引用

2011 International Conference on virtual Reality and Visualization, ICVRV 2011

作者： Chi, Changjian Chen, Xiaowu Yang, Ziqiang Jia, Guodong State Key Laboratory of Virtual Reality Technology and Systems School of Computer Science and Engineering Beihang University Beijing China

ISBN: (纸本)9780769546025

Realism and simplicity of virtual experiment scene building can influence the usage of virtual educational experiment applications. This paper proposes an image based method of experiment scene building for virtual Educational Experiments. Firstly, virtual educational experiment components are extracted from images of experiment instrument by using the interactive method of object extraction. Then, the corresponding logical model descriptions are attached to the extracted components. Finally, the components required in a specific experiment are inserted into the selected virtual experiment scene and are connected interactively. A routing algorithm based on equivalent connection line is designed to make the generated line connections between components clear and legible. A virtual experiment scene building system, named VE Scene builder, has been implemented and widely used. The feedbacks demonstrated that our system can rapidly generate realistic and legible virtual experiment scene. © 2011 IEEE.

关键词： Routing algorithms

来源：评论

学校读者我要写书评

暂无评论

Automatic compositing soccer video highlights with core-around event model

Automatic compositing soccer video highlights with core-arou...

引用

12th International Conference on computer-Aided Design and computer Graphics, CAD/Graphics 2011

作者： Jiang, Kai Chen, Xiaowu Zhao, Qinping State Key Laboratory of Virtual Reality Technology and Systems School of Computer Science and Engineering Beihang University Beijing China

ISBN: (纸本)9780769544977

This paper presents an automatic video highlighting approach in relation to a soccer match video lasting over ninety minutes, in which only the match video and the target length of the highlight video are required for the composition. Firstly, we propose a core-around event model, which represents the highlight as a complex event and consists of three components: semantic relations, temporal relationship among the activities and local motion appearance of each activity. Secondly, we detect activities involved in a highlight in the soccer match video by the local motion appearance. Thirdly, a candidate highlight video segment is aligned with the model by a specific kernel activity extracted on the basis of the semantic relations, and then assigned a matching score. Finally, we splice together the highlight segments of high matching score. Experimental results demonstrate that the composed highlight videos are attractive episodes of soccer matches, and similar to those edited by professional editors. © 2011 IEEE.

关键词： Semantics

来源：评论

学校读者我要写书评

暂无评论

A survey for light field super-resolution

引用

High-Confidence Computing 2024年第1期4卷 118-129页

作者： Mingyuan Zhao Hao Sheng Da Yang Sizhe Wang Ruixuan Cong Zhenglong Cui Rongshan Chen Tun Wang Shuai Wang Yang Huang Jiahao Shen State Key Laboratory of Virtual Reality Technology and Systems School of Computer Science and EngineeringBeihang UniversityBeijing 100191China Key Laboratory of Data Science and Intelligent Computing International Innovation InstituteBeihang UniversityHangzhou 311115China State Key Laboratory of Software Development Environment School of Computer Science and EngineeringBeihang UniversityBeijing 100191China

Compared to 2D imaging data,the 4D light field(LF)data retains richer scene’s structure information,which can significantly improve the computer’s perception capability,including depth estimation,semantic segmentation,and LF ***,there is a contradiction between spatial and angular resolution during the LF image acquisition *** overcome the above problem,researchers have gradually focused on the light field super-resolution(LFSR).In the traditional solutions,researchers achieved the LFSR based on various optimization frameworks,such as Bayesian and Gaussian *** learning-based methods are more popular than conventional methods because they have better performance and more robust generalization *** this paper,the present approach can mainly divided into conventional methods and deep learning-based *** discuss these two branches in light field spatial super-resolution(LFSSR),light field angular super-resolution(LFASR),and light field spatial and angular super-resolution(LFSASR),***,this paper also introduces the primary public datasets and analyzes the performance of the prevalent approaches on these ***,we discuss the potential innovations of the LFSR to propose the progress of our research field.

关键词： Light field super-resolution Convolutional neural network Transformer Sub-aperture image Epipolar-plane image

来源：评论

学校读者我要写书评

暂无评论

D-scheduler:A scheduler in time-triggered distributed system through decoupling dependencies between tasks and messages

引用

Science China(Technological Sciences) 2024年第1期67卷 183-196页

作者： YANG TingTing ZHANG YuQi YUE FengLai WUNIRI QiQiGe TONG Chao School of Computer Science&Engineering Beihang UniversityBeijing 100191China State Key Laboratory of Virtual Reality Technology and Systems Beihang UniversityBeijing 100191China National Innovation Center of Intelligent and Connected Vehicles Beijing 100176China

Time-triggered architecture,as a mainstream design of the distributed real-time system,has been successfully applied in the aerospace,automotive and mechanical ***,time-triggered scheduling is a challenging NP-hard *** are few studies that could quickly solve the scheduling problem of large distributed time-triggered *** solve this problem,a communication affinity parameter is defined in this paper to describe the degree of bias of the shaper task towards sending or receiving *** on this,an innovative task-message decoupling model named D-scheduler is built to reduce the computation complexity of the scheduling problem in large-scale ***,we provide mathematical proof that our model is a convex optimization that is easy to solve with existing computational *** experiments substantiate the efficacy of the *** dramatically reduces the scheduling complexity of large-scale real-time systems with a small loss of solving space compared to the federal scheduler.

关键词： time-triggered architecture time-triggered scheduling communication affinity parameter task-message decoupling model

来源：评论

学校读者我要写书评

暂无评论

A Network Security Situation Analysis framework based on information fusion

A Network Security Situation Analysis framework based on inf...

引用

2011 6th IEEE Joint International Information technology and Artificial Intelligence Conference, ITAIC 2011

作者： Zhang, Songmei Yao, Shan Ye, Xin'En Xia, Chunhe State Key Laboratory of Virtual Reality Technology and System School of Computer Science and Engineering Beihang University Beijing 100191 China

ISBN: (纸本)9781424486236

With the rapid development of the Internet, the network structure becomes larger and more complicated and attacking methods are more sophisticated, too. To enhance network security, Network Security Situation Analysis (NSSA) technology is a research hot spot in the network security domain. But at present, the NSSA framework and model which not only analyze the affected results of the network security but also the process how the network security is affected are less. In this paper, a novel NSSA framework is presented. The framework includes two parts: calculate the Network Security Situation Value (NSSV) and discover intrusion processes. NSSA quantitative assesses the impact on network security caused by attacks upon Analytical Hierarchy Process (AHP) and hierarchical network structure. Based on attack classification, intrusion processes discover the process how network security is affected. At last from the experiments results, NSSV exactly changes as attacks take place and the accurate intrusion processes are discovered. The applicability of the framework and algorithms are verified. © 2011 IEEE.

关键词： Network security

来源：评论

学校读者我要写书评

暂无评论

Routing and scheduling in large-scale hybrid network with heterogeneous infrastructure

Routing and scheduling in large-scale hybrid network with he...

引用

2008 International Conference on Wireless Networks, ICWN 2008

作者： Cao, Jing Liu, Zhaoyi Su, Jinzhao Wu, Wei State Key Laboratory of Virtual Reality Technology and Systems Beijing China School of Computer Science Beihang University Beijing China

ISBN: (纸本)1601320914

We present a practical routing and scheduling method to improving the capacity of ad hoc networks with infrastructure support. The performance of a large scale hybrid network with hundreds nodes connected by infrastructure and ten thousands mobile nodes is studied in this paper. We adopt a more realistic infrastructure assumption that is heterogeneous and has a finite bandwidth. Central of the routing method is using the P2P lookup algorithm to find the destination mobile node corresponded infrastructure node. We also model the schedule problem about how to allocate the wireless links and infrastructure links. A linear programming method and centralized greedy algorithm are designed for this scheduling problem, with a tradeoff between the computation time and performance for different applications. We evaluate the routing method performance under a small scale in-field-testbed and the two scheduling methods by simulation.

关键词： Linear programming

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：