检索结果-内蒙古大学图书馆

作者： Bednaříková, Barbora Charles University of Prague

Masters thesis Photographs of Presidential Candidates in Czech Newspapers ahead of Elections of 2013 compares the visual coverage of nine presidential candidates in the photographs published in three national broadsheet newspapers Lidové noviny, Právo and Hospodářské noviny during the period of four weeks before the first Czech direct presidential elections in January 2013. The theoretical part of the thesis summarizes literature probing the visual framing of politics and the influence of photographic images in media on audiences and their decisions in elections. The quantitative content analysis compares the number of each candidates pictures in the Czech press in order to determine whether the visual coverage was balanced or not and whether this could have affected the election results. It also verifies the hypothesis that newspapers tend to publish more pictures of the candidates with similar political orientation. Besides that, the thesis also compares how each of the journals uses photography illustration by examining the size, placement, type, caption length and authorship of the pictures.

关键词： Presidential election visual framing visual coverage portrait photography quantitative content analysis Miloš Zeman Karel Schwarzenberg

来源：评论

学校读者我要写书评

暂无评论

An Effective Method for Complete visual coverage Path Planning

An Effective Method for Complete Visual Coverage Path Planni...

引用

The Third International Joint Conference on Computational Science and Optimization(第三届计算科学与优化国际大会 CSO 2010)

作者： Jie Li Xiaohui Hu Changwen Zheng Dept. of Electronic Engineering and Information Science University of Science and Technology of Chin National Key Laboratory of Integrated Information System Technology ISCAS

This paper addresses the complete visual coverage path planning problem in raster terrain and presents an effective solution with hierarchy based on multiple observers siting and an evolutionary path planning algorithm. The main idea of the method is to get a nearly optimal complete visual coverage path by connecting all of the observers in the visual coverage set. Firstly a new deterministic algorithm for a quasi minimal number set of observers is presented, which is superior to the general greedy algorithm in the time complexity and the quality of solutions. On the basis of that we further present a hierarchy path planning method whose core is an evolutionary algorithm. The advantage of the proposed method is that it realizes really complete visual coverage with a comparatively optimal path and easy to extend to the version of multiple paths.

关键词： visual coverage complete coverage path planning multiple observers sitting evolutionary algorithm raster terrain

来源：评论

学校读者我要写书评

暂无评论

Evolutionary Algorithm for Optimal visual coverage Path in Raster Terrain

Evolutionary Algorithm for Optimal Visual Coverage Path in R...

引用

2010 3rd IEEE International Conference on Computer Science and Information Technology—ICCSIT 2010

作者： Jie Li Dept.of Electronic Engineering and Information Science University of Science and Technology of China Hefei,China Changwen Zheng,Xiaohui Hu National Key Laboratory of Integrated Information System Technology,ISCAS Beijing,China

There is a wide range of applications in both military and civil fields for optimal path problem in raster terrain whose cost is visibility *** the path search problem whose objective is maximal average horizon,the traditional algorithms are unsuitable due to the characteristic of the *** paper presents a method based on evolutionary algorithm,which may rapidly get the optimal solution by designing multiple effective evolutionary operators and self-adaptively adjusting the probability of each *** show that the method presented is superior to the simulated annealing algorithm.

关键词： evolutionary algorithm average horizon visual coverage raster terrain

来源：评论

学校读者我要写书评

暂无评论

visual sensor network lifetime maximization by prioritized scheduling of nodes

引用

JOURNAL OF NETWORK AND COMPUTER APPLICATIONS 2013年第1期36卷 409-419页

作者： Hooshmand, M. Soroushmehr, S. M. R. Khadivi, P. Samavi, S. Shirani, S. Isfahan Univ Technol Dept Elect & Comp Engn Esfahan Iran McMaster Univ Dept Elect & Comp Engn Hamilton ON Canada

visual surveillance of a designated air space can be achieved by a randomly distributed camera sensor network spread over a large area. The location and field of view of each battery operated sensor, after a calibration phase, will be known to a central processing node. To increase the lifetime of the network, the density of distributed sensors could be such that a subset of sensors can cover the required air space. As a sensor dies another sensor should be selected to compensate for the dead one and reestablish the complete coverage. This process should be continued until complete coverage is not achievable by the existing sensors. Thereafter, a graceful degradation of the coverage is desirable. The goal is to elongate the lifetime of the network while maintaining a maximum possible coverage of the designated air space. Since the selection of a subset of sensors for complete coverage of the target area is an NP-complete problem, we present a number of heuristics for this case. The proposed methods are categorized in two groups. In one category, the sensors are prioritized based on their visual and communicative properties and the selection is performed according to the prioritizing function. In the other group, we propose traditional evolutionary and swarm intelligence algorithms. The performance of the proposed methods is evaluated through extensive simulations. (C) 2012 Elsevier Ltd. All rights reserved.

关键词： visual sensor network Directional sensors visual coverage Priority based algorithms Genetic algorithm PSO algorithm

来源：评论

学校读者我要写书评

暂无评论

AN OPTIMIZED PLACEMENT ALGORITHM FOR COLLABORATIVE INFORMATION PROCESSING AT A WIRELESS CAMERA NETWORK

AN OPTIMIZED PLACEMENT ALGORITHM FOR COLLABORATIVE INFORMATI...

引用

IEEE International Conference on Multimedia and Expo Workshops (ICMEW)

作者： Zhang, Hongguang Xia, Lingnan Tian, Fei Wang, Peng Cui, Jianzhu Tang, Chao Deng, Nana Ma, Na Chinese Acad Sci Shanghai Adv Res Inst Beijing 100864 Peoples R China shanghai key Lab Digital Media Process & Transmis Shanghai Peoples R China Chinese Acad Sci Shanghai Inst Microsyst & Informat Technol Beijing 100864 Peoples R China

ISBN: (纸本)9781479900152

The collaborative information processing is to identify, reconstruct and track targets collaboratively among multiple nodes which can complement each other for sensing capability, tolerate faults, and provide reliable decision. visual coverage and wireless connectivity are the most important two factors for collaborative information processing at a wireless camera network. This paper proposes a novel 3 Dimension (3D) surveillance model, which can solve the blind-area issue caused by the traditional 2D model. Furthermore, an optimal camera placement scheme is presented by using a binary integer programming algorithm on which the restraint of wireless connectivity is applied. Experimental results show that our method can effectively solve the problem of the blind-area issue, while satisfying the demand of the wireless connectivity.

关键词： Camera Placement visual coverage Wireless Connectivity 3D Surveillance Model

来源：评论

学校读者我要写书评

暂无评论

MSNS: mobile sensor network simulator for area coverage and obstacle avoidance based on GML

引用

EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING 2012年第1期2012卷 1-15页

作者： Jeong, Young-Sik Han, Youn-Hee Park, James J. Lee, SooYoung Seoul Natl Univ Sci & Technol Dept Comp Sci & Engn Seoul South Korea Elect & Telecommun Res Inst Embedded Software Res Dept Taejon 305606 South Korea Wonkwang Univ Dept Comp Engn Iksan 570749 South Korea Korea Univ Technol & Educ Adv Technol Res Ctr Cheonan South Korea

A mobile sensor network is a distributed collection of sensors, each of which has sensing, computation, communication, and locomotion capabilities. In particular, locomotion facilitates the ability to self-deployment. In such a network of self-deployable mobile sensors, it is difficult to evaluate the effectiveness of mobile sensor network deployment in a given target area because we cannot predict the coverage rate for the target area. The coverage rate will be changed due to the number of sensor required in the target area, connectivity degree to be maintained and unknown obstacles. In this article, we develop mobile sensor network simulator (MSNS) in order to visualize (1) coverage secured by mobile sensors and (2) avoidance of obstacle objects (building, road and wall, and so on) on the real map drawn by GML (Geography Markup Language). From a user, MSNS receives the number of mobile sensor nodes, connectivity degree, sensor node's sensing range, communication range, and supersonic wave range. And then it visualizes the location information of sensor nodes, connectivity degree, and sensing coverage, all of which change with simulation time. Thereby we can estimate how many nodes are required in a given target area, and also calculate coverage rate of the target area in advance to the real deployment of mobile sensors.

关键词： mobile sensor network visual coverage connectivity potential field

来源：评论

学校读者我要写书评

暂无评论

Same events, two stories: Comparing the photographic coverage of the 2008 anti-China/Olympics demonstrations in Chinese and US newspapers

引用

International Communication Gazette 2011年第8期73卷 732 - 752页

作者： Ying Huang Shahira Fahmy The University of West Florida USA The University of Arizona USA

A content analysis of photos from four major US newspapers and four major Chinese newspapers depicting the 2008 anti-China/Olympics protests revealed significantly different denoted themes. On one hand, the most prominent dominant visual theme in US newspapers was suppression followed by pro-Tibet demonstrations. On the other hand, in Chinese newspapers the most dominant visual theme was the Olympic torch relay followed by riots and restoring order. Overall, the US dailies visually portrayed a more pro-Tibetan independence slant and the Chinese dailies visually portrayed a more pro-Chinese government slant. Further, the US newspapers portrayed the anti-China demonstrators as non-violent while the Chinese newspapers portrayed them as violent. To give their readers a sense of harmony, Chinese dailies limited the number of images showing anti-China protests, while the US dailies highlighted them, communicating to their readers the suppressive nature of the Chinese government and downplaying the voices of people who supported it.

关键词： Chinese newspapers Olympics demonstrations US newspapers visual coverage

来源：评论

学校读者我要写书评

暂无评论

Camera Scheduling and Energy Allocation for Lifetime Maximization in User-Centric visual Sensor Networks

引用

IEEE TRANSACTIONS ON IMAGE PROCESSING 2010年第8期19卷 2042-2055页

作者： Yu, Chao Sharma, Gaurav Univ Rochester Dept Elect & Comp Engn Rochester NY 14627 USA Univ Rochester Dept Biostat & Computat Biol Rochester NY 14627 USA

We explore camera scheduling and energy allocation strategies for lifetime optimization in image sensor networks. For the application scenarios that we consider, visual coverage over a monitored region is obtained by deploying wireless, battery-powered image sensors. Each sensor camera provides coverage over a part of the monitored region and a central processor coordinates the sensors in order to gather required visual data. For the purpose of maximizing the network operational lifetime, we consider two problems in this setting: a) camera scheduling, i.e., the selection, among available possibilities, of a set of cameras providing the desired coverage at each time instance, and b) energy allocation, i.e., the distribution of total available energy between the camera sensor nodes. We model the network lifetime as a stochastic random variable that depends upon the coverage geometry for the sensors and the distribution of data requests over the monitored region, two key characteristics that distinguish our problem from other wireless sensor network applications. By suitably abstracting this model of network lifetime and utilizing asymptotic analysis, we propose lifetime-maximizing camera scheduling and energy allocation strategies. The effectiveness of the proposed camera scheduling and energy allocation strategies is validated by simulations.

关键词： Camera scheduling energy allocation image sensor networks network lifetime visual coverage

来源：评论

学校读者我要写书评

暂无评论

Emerging Alternatives or Traditional News Gates: Which News Sources Were Used to Picture the 9/11 Attack and the Afghan War?

引用

International Communication Gazette 2005年第5期67卷 381 - 398页

作者： Shahira Fahmy

This study examines news sources used to visually portray the 11 September 2001 attack and the war in Afghanistan in the English-language newspaper The International Herald Tribune and the Arabic-language newspaper Al-Hayat. Differences were noted between news sources of images depicting the 9/11 attack and the Afghan War. However, despite these differences, the vast majority of photographs were from the main western news agencies: AP, AFP and Reuters. Results overall suggest, while there is no indication of changes in patterns of information flow, western news agencies provide a variety of news to be framed differently by different media.

关键词： 9/11 attack Afghan War framing news sources transnational media visual coverage

来源：评论

学校读者我要写书评

暂无评论

The functional organization of area V2, II: The impact of stripes on visual topography

引用

visual NEUROSCIENCE 2002年第2期19卷 211-231页

作者： Shipp, S Zeki, S UCL Wellcome Dept Cognit Neurol London WC1E 6BT England

We have examined the visuotopic organization of area V2 of macaque monkeys in relation to its modular construction, comprising repetitive cycles of stripes running perpendicular to the border with area V1. Receptive fields were plotted in anesthetised animals, mainly using long penetrations parallel to the V1 border crossing several stripes in dorsal V2 within the representation of paracentral, inferior visual field. We confirm that each set of modules (thick, thin, and interstripes) mounts an unbroken coverage of the visual field, since there is almost invariably some overlap between the aggregate fields recorded in successive stripes of the same class, at intervals of one cycle. Also as expected, penetrations perpendicular to the stripes record changes in eccentricity along an isopolar visual meridian. We measured the size of the point image along such an isopolar meridian in nine cases, and showed that on average it exceeds the length of a typical cycle;again, this implies that no point in space escapes analysis by any of the functional modules. The representation of eccentricity across a cycle of stripes resembles a "ratchet" model, in which the gradient of eccentricity across a single stripe exceeds the gradient across the full cycle, leading to discontinuities ("switchbacks") at the borders between stripes. The shift in eccentricity across the width of a stripe is sufficient to maintain a virtually continuous map across successive stripes of the same class: when coupled to receptive Field scatter about the mean trend, this creates the overlap of aggregate fields. The presence of topographic discontinuities, in addition to functional ones, at stripe boundaries, reflects autonomy of function at the local level. At a global level, however, the organization of V2 may promote integration across stripes, since the range of visual overlap, and intrinsic connections, exceeds a single cycle. Furthermore, the reduplication of modules along the isopolar axis has the effe

关键词： cytochrome oxidase stripes retinotopic mapping visual coverage "ratchet model" and "switchbacks" functional specialization functional integration

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：