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检索条件"主题词=Algorithm design and analysis"

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Remote sensing monitoring research for coal fire in Wuda coal mining using ASTER thermal infrared images

Remote sensing monitoring research for coal fire in Wuda coa...

引用

International Workshop on Earth Observation and Remote Sensing Applications (EORSA)

作者： Feng Li Xiaoyang Liu Jun Liu Qiuling Wang An Qian Institute of Disaster Prevention Sanhe China

Coal fire catastrophes in coal field usually lead to subsidence, collapse, landslide, crack of mining land surface, destroy coal resources and threat local environment, residents health et al. Wuda coal field in Inner Mongolia is one of the largest coal fires area worldwide, which has been researched most extensively. Since August 2010, a fire-fighting project in Wuda coal mining was performed, which was designed to be accomplished in 2013 and set 2014 as fire-fighting monitoring period. Currently most researches concentrate on the fierce burning period of coal fire, but ignore the evaluation of extinguishing effect. In order to supervise and evaluate situation of coal fires before and after performing fire-fighting project, we adopted ASTER thermal infrared bands in 2008, 2010, 2013 and 2015 as data resources to retrieve mining land surface temperatures in each year using classic Temperature and Emissivity Separation (TES) algorithm. Self-Adaptive Gradient-Based Thresholding (SAGBT) algorithm was applied to extract coal fire areas in Wuda coal field during four years. By comparing extracted coal fire areas in 2008 with reference coal fire areas based on aerial thermal infrared images in 2009, we found that overlay degrees of both reach 71.4%. The precision of this method would be more higher if acquired times of two kinds of images kept consistency. Based on the same method, coal fire areas during other three years were respectively extracted and used to analyze evolution status of coal fires. The results showed that coal fire areas overall dropped by 37.5% in 2015 than in 2008, which declared fire-fighting activities in Wuda coal field had taken good effects at some extent. However, preservation of 1.2 km 2 indicated that more fire-fighting measures need to be adopted by local administrator for drastically extinguishing coal fire disasters.

关键词： Coal Fires Remote sensing Earth Land surface Monitoring algorithm design and analysis

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Research on the Transformation of Control Protocols among Three Kinds of Cooperative Control for Multi-agent Systems

Research on the Transformation of Control Protocols among Th...

引用

International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC

作者： Dianhao Zheng Hongbin Zhang School of Electronic Engineering University of Electronic Science and Technology of China Chengdu P. R. China

ISBN: (纸本)9781509007691

In this paper, the transformation of control protocols is researched among three kinds of cooperative control (consensus with no leader, tracking control with one leader, containment control with multiple leaders) for multi-agent systems. By the extension of local neighborhood synchronization error, the consensus problem, the tracking problem, and the containment problem are converted to the stability problem of the extended local neighborhood synchronization error. Some results of protocols transformation are present. The main contribution of this paper is not the design of a control protocol, but the result about the transformation of control protocols among consensus, tracking, and containment control, resulting to the cost reduction of the design of another control protocol.

关键词： Protocols Synchronization Multi-agent systems algorithm design and analysis Control systems Electronic mail Stability analysis

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Direct EM Reconstruction of Parametric Images from List-Mode Brain PET using a Novel Model Based on Logan Graphical analysis

Direct EM Reconstruction of Parametric Images from List-Mode...

引用

IEEE Nuclear Science Symposium

作者： Jean-Dominique Gallezot Mary K. Germino Richard E. Carson Department of Radiology and Biomedical Imaging Yale PET Center New Haven CT Department of Biomedical Engineering Yale University New Haven CT

Direct reconstruction of parametric images from raw dynamic PET data has the potential of producing lower noise images than obtained using intermediate frame-based reconstructed images, due to the accurately characterized statistical properties of raw PET data. The goal of this study was to extend a previous direct parametric reconstruction algorithm (PMOLAR). PMOLAR uses the Expectation Maximization (EM) algorithm to estimate the parametric maps. Previous versions of PMOLAR were based on the one-tissue (1T) compartment model (PMOLAR-1T). The 1T model is suitable for some PET tracers, but most reversible PET radioligand kinetics are better described by more complex models, mainly the two-tissue (2T) compartment model. Alternatively, Logan Graphical analysis (GA) can be applied to all reversible PET tracers. In this study PMOLAR was adapted to a new model based on GA. Two versions of the new reconstruction algorithm were investigated. PMOLAR-GA was evaluated on human data acquired on the High Resolution Research Tomograph (HRRT) after injection of [~(11)C]PBR28, a radiotracer used to study neuroinflammation. The new model derived from GA was first compared to previous modeling methods (MA1, LEGA, 2T) suitable for [~(11)C]PBR28 on fits of region of interest time-activity curves. Then the two new versions of PMOLAR were evaluated on a human 4D PET data set. PMOLAR-GA parametric maps were compared to frame-based parametric maps. Using routine reconstruction settings, frame based parametric maps were visually very noisy and biased (between 27±4% and 222±121% on a regional level, depending on the modeling method). While the PMOLAR-GA mean regional values were very close to reference values (11%±9% or 8%±9%), with visually lower noise at the voxel level.

关键词： Mathematical model Image reconstruction Positron emission tomography Adaptation models Data models Heuristic algorithms algorithm design and analysis

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User-centric QoE-driven vertical handover framework in heterogeneous wireless networks

User-centric QoE-driven vertical handover framework in heter...

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IEEE International Conference on Wireless and Mobile Computing, Networking And Communications (WiMob)

作者： Li Liu Lingfen Sun Emmanuel Ifeachor School of Computing Electronics and Mathematics Plymouth University Plymouth UK

ISBN: (纸本)9781509007257

With advances in wireless technology and the increase in popularity of mobile devices, more and more people now rely on mobile devices for multimedia services (such as video streaming and video calls). A mobile device can be connected and roamed to different networks in heterogeneous wireless networks. The Media Independent Handover (MIH) framework is designed by the IEEE 802.21 group to support seamless vertical handover between different networks. However, how to select an appropriate network from available ones and when to execute the handover remain the key challenges in MIH. This paper proposes a user-centric QoE-driven vertical handover (VHO) framework, based on MIH, which aims to maintain acceptable QoE of different mobile application services and to select an appropriate network based on users' preferences (e.g. on cost). Further a user-centric QoE-driven algorithm is implemented in the proposed framework. Its performance is evaluated and compared with two other VHO algorithms based on Network Simulator 2 (NS2) for video streaming services over heterogeneous networks. The preliminary results show that the proposed algorithm can maintain better QoE and at the same time, take into account user's preference on cost when compared with the other two algorithms.

关键词： Handover algorithm design and analysis Streaming media Wireless communication Quality of service Prediction algorithms

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An geographical adaptive routing algorithm based on overlapping area for uranium tailings radionuclide contamination monitoring in WSN

An geographical adaptive routing algorithm based on overlapp...

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International Conference on Electronics Information and Emergency Communication

作者： Xiuwu Yu Feng Zhang Feisheng Fan Lixing Zhou Environmental Protection and Safety Engineering Institute University of South China Hengyang China

ISBN: (纸本)9781509019984

WSN can be applied to observe uranium tailings radionuclide contamination. Due to its energy constraint, a nice good clustering algorithm must use the network energy efficiently. For the lack of LEACH and GAF, an geographical adaptive routing algorithm based on overlapping area(GAOA)is proposed. The monitoring area is divided into a grid of circle according to location information of sensor node and intersecting circle structure. With residual energy and distance to the center within circle, the nodes will be selected as cluster heads. Then cluster heads choose the optimal next hop to transmit data to base station. As is shown in the experiment, the algorithm can save energy efficiently and prolong the network lifetime.

关键词： Clustering algorithms Uranium Monitoring Wireless sensor networks Energy consumption Routing algorithm design and analysis

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Attendance management system using hybrid face recognition techniques

Attendance management system using hybrid face recognition t...

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Conference on Advances in Signal Processing (CASP)

作者： Nazare Kanchan Jayant Surekha Borra Dept of ECE K.S. Institute of Technology Bangalore India

ISBN: (纸本)9781509008506

Attendance recording of a student in an academic organization plays a vital role in judging students performance. As manual labor involved in this process is time consuming, an automated Attendance Management System (AMS) based on face detection and face recognition techniques is proposed in this paper. The system employs modified Viola-Jones algorithm for face detection, and alignment- free partial face recognition algorithm for face recognition. After successful recognition of a student, the system automatically updates the attendance in the excel sheet. The proposed system improves the performance of existing attendance management systems by eliminating manual calling, marking and entry of attendance in institutional websites.

关键词： Face Face recognition Face detection Feature extraction algorithm design and analysis Probes Robustness

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Integration of single stage solar PV system to grid under abnormal grid conditions

Integration of single stage solar PV system to grid under ab...

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International Conference on Emerging Trends in Electrical Electronics & Sustainable Energy Systems (ICETEESES)

作者： Ikhlaq Hussain Maulik Kandpal Bhim Singh Dept. of Electrical Engineering IIT Delhi New Delhi India

ISBN: (纸本)9781509021192

This paper deals with the modelling and design of a single stage solar PV (Photovoltaic) grid integrated power generating system using fuzzy logic based maximum power point tracking (FL-MPPT) with a decoupled current controller based control algorithm under abnormal grid conditions. The system includes solar PV array, FL-MPPT, two level VSC connected to three phase AC grid. A FL-MPPT is used to track maximum power from solar PV array which gives reference voltage and power to decoupled current controller. Fuzzy logic control provides a fast response without fluctuations and is able to adjust the step size depending on the varying conditions. The solar PV system transfer maximum energy to the grid at nearly unity power factor. Simulated results validate the design and control algorithm under dynamic conditions of varying solar insolation, sudden voltage sag and swell conditions.

关键词： Voltage control Fuzzy logic Heuristic algorithms Capacitors Reactive power algorithm design and analysis Maximum power point trackers

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An ant colony system solving the travelling salesman region problem

An ant colony system solving the travelling salesman region ...

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International Symposium on Computational and Business Intelligence (ISCBI)

作者： Benjamin Lammel Karin Gryzlak Rolf Dornberger Thomas Hanne University of Applied Sciences and Arts Northwestern Institute for Business Information Systems Olten Switzerland

ISBN: (纸本)9781509034895

A variant of the well-known travelling salesman problem is about introducing particular dependencies among the cities. Such dependencies might describe the relations between single cities which can be used for autonomous vehicles that need to follow certain paths for some reasons. This paper deals with solving the Travelling Salesman Region Problem where particular connections of cities are already predefined. We are investigating and discussing the influences of the parameters of the Ant Colony Optimization algorithm solving travelling salesman region problems.

关键词： Urban areas Ant colony optimization algorithm design and analysis Business Legged locomotion Optimization Turning

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A novel approach for m-representative skyline query

A novel approach for m-representative skyline query

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International Conference on Advances in Social Network analysis and Mining, ASONAM

作者： Heng-Shiou Sheu Yi-Chung Chen Don-Lin Yang Department of Communications Engineering Feng Chia University Taichung Taiwan R.O.C. Department of Information Engineering Computer Science Feng Chia University Taichung Taiwan R.O.C.

ISBN: (纸本)9781509028474

Skyline queries are currently the most notable type of multi-criteria search algorithm. A skyline query returns all of the data points in a given a dataset that are not dominated by other data points. However, this type of query is limited by the fact that the number of results cannot be controlled. In some cases, this can result in an excessive number of results, whereas other cases result in an insufficient number of results. In this study, we propose a scheme referred to as m-representative skyline queries to provide control over the number of results that are returned. We also developed a naive algorithm and a sorted algorithm to provide additional control over the search process. Experiment results demonstrate the efficacy of the proposed approach.

关键词： algorithm design and analysis Databases Partitioning algorithms Social network services Simulation Filtering algorithms Computational modeling

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Enhancing utility via clustering in privacy preservation

Enhancing utility via clustering in privacy preservation

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International Conference on Systems and Informatics (ICSAI)

作者： Yujia Li Xin Wang Lei Zhao School of Electronics and Information Shanghai DianJi University Shanghai China

ISBN: (纸本)9781509055227

When sensitive information needs to be released involved privacy preservation, which has attracted a widely range of research interests. K-anonymity is one of the most important anonymity models that have been Extensively research and many thinking have been presented to improve it. A way to make data anonymous is generalization. Cluster is a collection of data objects, which are similar to the objects in the same cluster, and different from the objects in other clusters. Both of these two methods have the same characteristics: assign the tuples to many small groups. Based on the above problems, we propose a clustering-based k-anonymity algorithm, which achieves k-anonymity through clustering.

关键词： Clustering algorithms algorithm design and analysis Partitioning algorithms Data privacy Privacy Loss measurement Heuristic algorithms

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