检索结果-内蒙古大学图书馆

A Distributed 2D-to-3D Video Conversion System

China Communications 2013年第5期10卷 30-38页

作者：张哲斌张吉安张学西王亦洲高文 Key Laboratory of Intelligent Information Processing Institute of Computing Technology Chinese Academy of Sciences National Engineering Laboratory for Video Technology and Key Laboratory of Machine Perception (Ministry of Education) School of Electronics Engineering and Computer Science Peking University University of Chinese Academy of Sciences

2D-to-3D video conversion is a feasible way to generate 3D programs for the current 3DTV industry. However, for large-scale 3D video production, current systems are no longer adequate in terms of the time and labor required for conversion. In this paper, we introduce a distributed 2D-to-3D video conversion system that includes a 2D-to-3D video conversion module, architecture of the parallel computation on the cloud, and 3D video coding in the system. The system enables cooperation among multiple users in the simultaneous completion of their conversion tasks so that the conversion efficiency is greatly promoted. In the experiments, we evaluate the system based on criteria related to both time consumption and video coding performance.

关键词： 3D video 2D-to-3D conversion distributed system

来源：评论

学校读者我要写书评

暂无评论

A Model of Three Points for Location Estimation in Wireless Sensor Networks

A Model of Three Points for Location Estimation in Wireless ...

引用

2013 2nd International Symposium on Materials Science and Engineering Technology(ISMSET 2013)

作者： Shaoguo Xie Yanjun Hu Yi Wang Fang Jiang Jingjing Liu Yingguan Wang Key Laboratory of Intelligent Computing & Signal Processing Ministry of Education An Hui University Key Laboratory of Wireless Sensor Network & Communication Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences

In this paper, we propose a novel model of three points named TP for location estimation in wireless sensor networks(WSNs) with random deployment of anchor nodes. In this model, we select three anchor nodes which have the strongest received signal strength(RSS) for location estimation, the centroid algorithm and the method of intersection of judgment are used to estimate the location of unknown nodes. To further exploit three nearest intersection points in TP, the enhanced TP(ETP) is proposed. The simulation results show that the proposed models outperform MMSE and BML in terms of the localization accuracy for WSNs. Moreover, the localization accuracy of the proposed models in scenario 2 with random deployment of anchor nodes are better than in scenario 1 with planned deployment of anchor nodes. Additionally, compared with MMSE and BML, ETP and TP can reduce the environmental impact on location estimation.

关键词： Location estimation Anchor node Wireless sensor networks

来源：评论

学校读者我要写书评

暂无评论

Nitrogen vertical distribution by canopy reflectance spectrum in winter wheat

引用

IOP Conference Series: Earth and Environmental Science 2014年第1期17卷

作者： W J Huang Q Y Yang D L Peng L S Huang D Y Zhang G J Yang Key Laboratory of Digital Earth Science Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences Beijing 100094 China Key Laboratory of Intelligent Computing & Signal Processing Ministry of Education Anhui University Hefei 230039 Anhui China Beijing Agriculture Information Technology Research Center Beijing 100097 China

Nitrogen is a key factor for plant photosynthesis, ecosystem productivity and leaf respiration. Under the condition of nitrogen deficiency, the crop shows the nitrogen deficiency symptoms in the bottom leaves, while excessive nitrogen will affect the upper layer leaves first. Thus, timely measurement of vertical distribution of foliage nitrogen content is critical for growth diagnosis, crop management and reducing environmental impact. This study presents a method using bi-directional reflectance difference function (BRDF) data to invert foliage nitrogen vertical distribution. We developed upper-layer nitrogen inversion index (ULNI), middle-layer nitrogen inversion index (MLNI) and bottom-layer nitrogen inversion index (BLNI) to reflect foliage nitrogen inversion at upper layer, middle layer and bottom layer, respectively. Both ULNI and MLNI were made by the value of the ratio of Modified Chlorophyll Absorption Ration Index to the second Modified Triangular Vegetation Index (MCARI/MTVI2) referred to as canopy nitrogen inversion index (CNII) in this study at ±40° and ±50°, and at ±30° and ±40° view angles, respectively. The BLNI was composed by the value of nitrogen reflectance index (NRI) at ±20° and ±30° view angles. These results suggest that it is feasible to measure foliage nitrogen vertical-layer distribution in a large scale by remote sensing.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A new automatic analysis system for risk behaviors

A new automatic analysis system for risk behaviors

引用

2013 International Conference on Information and Communication Technology for education (ICTE 2013)

作者： Chan Xu Xin Liu Jian Wu BoYu OuYang Key Laboratory of Intelligent Computing and Information Processing (Xiangtan University) Ministry of Education Institute of Information Engineering Xiangtan University

At present, the software's type forms present diversity, and how to automatically analyze the software's risk behaviors become an urgent problem. This paper used some software behavior crawlers and dynamic analysis method, crawled many representative kinds of malware's behavior, then mapped the behavior as a training data, and combined with BP neural network, established an automated analysis system for risk behaviors. Experiment shows that the system can automatically analyze whether a software is malware, which has better results and a strong practical intelligence.

关键词： risk behavior dynamic analysis malware BP neural network dangerous behaviors intelligence

来源：评论

学校读者我要写书评

暂无评论

A knowledge-based heuristic particle swarm optimization approach with the adjustment strategy for the weighted circle packing problem

A knowledge-based heuristic particle swarm optimization appr...

引用

作者： Li, Ziqiang Tian, Zhuojun Xie, Yanfang Huang, Rong Tan, Jiyang School of Information and Engineering Xiangtan University Xiangtan Hunan 411105 China Key Laboratory of Intelligent Computing and Information Processing Xiangtan University Ministry of Education Xiangtan Hunan 411105 China School of Mathematics and Computer Science Xiangtan University Xiangtan Hunan 411105 China

The weighted circle packing problem is a kind of important combination optimization problem and has the NP-hard property. Inspired by the No Free Lunch Theorem, a knowledge-based heuristic particle swarm optimization approach with the adjustment strategy (KHPSOA) is developed for this problem. The knowledge (e.g., the relation between its weight matrix and better solution) is obtained from this problem itself and existing layout scheme diagrams and applied to form more effective ordering and positioning rules of the proposed heuristic method. A better layout scheme of larger circles is obtained through the heuristic method. The optimal solution of this problem is obtained by inserting a few residual smaller circles into the gaps of the better layout scheme and further optimizing it through the proposed particle swarm optimization with the adjustment strategy. The numerical experiments show that KHPSOA is superior to the existing algorithms in the performances. © 2013 Elsevier Ltd. All rights reserved.

关键词： Heuristic methods

来源：评论

学校读者我要写书评

暂无评论

A heuristic ant colony approach for the circle and rectangle packing problems with rotary inertia constraints

A heuristic ant colony approach for the circle and rectangle...

引用

International Conference on Natural Computation (ICNC)

作者： Ziqiang Li Bowen Song Xianfeng Wang Ruopeng Li School of Information and Engineering Xiangtan University Xiangtan China Processing of Ministry of Education Key Laboratory of Intelligent Computing & Information Xiangtan China

Time-consuming calculations of overlapping areas among objects have become a bottleneck that restricts further improvement of evolutionary algorithms for circle and rectangle packing problems. This paper proposes a heuristic ant colony optimization (HACO) algorithm for the circle and rectangle packing problems with rotary inertia constraints (ICCRPP). The proposed heuristic method is used by artificial ants to construct the feasible layout schemes. Through the ant colony optimization, the optimal layout scheme can be gotten for ICCRPP. Because the introduction of the related layout knowledge in the ordering and positioning rules can make both the envelope radius and rotary inertia of the constructing layout scheme less. The numerical experimental results show that the computational efficiency and solution accuracy of HACO algorithm are satisfactory for ICCRPP.

关键词： Layout Heuristic algorithms Optimization Ant colony optimization Algorithm design and analysis Computational efficiency Containers

来源：评论

学校读者我要写书评

暂无评论

A divide-conquer quasi-physical and quasi-human algorithm for the circle and rectangle orthogonal packing problem with equilibrium constraints

A divide-conquer quasi-physical and quasi-human algorithm fo...

引用

International Conference on Natural Computation (ICNC)

作者： Ziqiang Li Xianfeng Wang Bowen Song Nannan Sun Processing of Ministry of Education Key Laboratory of Intelligent Computing & Information Xiangtan China School of Information and Engineering Xiangtan University Xiangtan China

The circle and rectangle orthogonal packing problem with equilibrium constraints (ECROPP) belongs to NP-hard problems. This paper proposes a divide-conquer QPQH (DCQPQH) algorithm for this problem. A mathematical model is built for the divide-conquer solution of ECROPP. And then on the basis of the embedding depths between two rectangles and between the circle and rectangle, an elastic potential energy function of the system is given. Then, the DCQPQH algorithm is presented through a combination of the divide-conquer strategy and QPQH algorithm based on the elastic potential energy function. Because the combination makes the proposed DCQPQH algorithm inherit excellent properties of QPQH and the advantage of the divide-conquer solution, its solution accuracy and computational efficiency are improved. The numerical experiments show that performances of the proposed DCQPQH algorithm are superior to those of the existing algorithms.

关键词： Layout Containers Potential energy Algorithm design and analysis Satellites Mathematical model Heuristic algorithms

来源：评论

学校读者我要写书评

暂无评论

Convergence of variational iteration method for second-order delay differential equations

引用

Journal of Applied Mathematics 2013年第unknown期2013卷 634670-1-634670-9页

作者： Liu, Hongliang Xiao, Aiguo Su, Lihong Key Laboratory of Intelligent Computing and Information Processing Xiangtan University Ministry of Education Xiangtan Hunan 411105 China

This paper employs the variational iteration method to obtain analytical solutions of second-order delay differential equations. The corresponding convergence results are obtained, and an effective technique for choosing a reasonable Lagrange multiplier is designed in the solving process. Moreover, some illustrative examples are given to show the efficiency of this method. © 2013 Hongliang Liu et al.

关键词： differential employs variational Differentiation matrix iteration iterative methods Differential equations delay EMPLOYMENT Converge Differential

来源：评论

学校读者我要写书评

暂无评论

A heterogeneous-aware cooperative MIMO transmission scheme in WSN

Journal of Software

引用

Journal of Software 2013年第3期8卷 639-644页

作者： Pei, Tingrui Xie, Da Li, Zhetao Tu, Dengbiao Choi, Youngjune College of Information Engineering Xiangtan University Xiangtan 411105 China Key Laboratory of Intelligent Computing and Information Processing of Ministry of Education Xiangtan University Xiangtan 411105 China School of Computer National University of Defense Technology Changsha 410073 China National Computer Network Emergency Response Technical Team/Coordination Center of China Beijing 100029 China Department of Information and Computer Engineering Ajou University Suwon 443749 Korea Republic of

A heterogeneous-aware cooperative MIMO transmission scheme (HAMS) is proposed to optimize the network lifetime and save energy for energy heterogeneous wireless sensor networks (WSN). This scheme extends the traditional low-energy adaptive clustering hierarchy (LEACH) protocol to enable the cooperative MIMO transmission between the sink and clusters. Through the adaptive selection of cooperative nodes and the cooperative MIMO transmission, HAMS can gain effective performance improvement in terms of taking advantage of the presence of node heterogeneity. Based on the energy consumption model developed in this paper, the optimal parameter to minimize the overall energy consumption is found. Simulation results exhibit that HAMS can effectively save energy and prolong the network time. Furthermore, HAMS displays more resilient in different degree of heterogeneous wireless sensor networks. © 2013 ACADEMY PUBLISHER.

关键词： Energy utilization

来源：评论

学校读者我要写书评

暂无评论

The improved disc theorems for the Schur complements of diagonally dominant matrices

引用

Journal of Inequalities and Applications 2013年第1期2013卷 1-16页

作者： Zhang, Juan Liu, Jianzhou Tu, Gen Department of Mathematics and Computational Science Xiangtan University Xiangtan P.R. China Key Laboratory of Intelligent Computing and Information Processing of Ministry of Education Xiangtan University Xiangtan P.R. China

The theory of Schur complement is very important in many fields such as control theory and computational mathematics. In this paper, applying the properties of Schur complement, utilizing some inequality techniques, some new estimates of diagonally dominant degree on the Schur complement of matrices are obtained, which improve some relative results. Further, as an application of these derived results, we present some distributions for the eigenvalues of the Schur complements. Finally, the numerical example is given to show the advantages of our derived results. MSC:15A45, 15A48.

关键词：

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：