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检索条件"机构=Computer and Inf. Science and Engineering"

共 165 条记录，以下是51-60 订阅

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Evaluation of Classifiers to a Childhood Pneumonia computer-Aided Diagnosis System

Evaluation of Classifiers to a Childhood Pneumonia Computer-...

引用

Annual IEEE Symposium on computer-Based Medical Systems

作者： Rafael T. Sousa Oge Marques Gabriela T.F. Curado Ronaldo M. da Costa Anderson S. Soares Fabrízzio A.A.M.N. Soares Leandro L.G. de Oliveira Instituto de Ciencias Exatas e da Terra Universidade Federal de Mato Grosso (UFMT) Barra do Garças Brazil Department of Computer & Electrical Engineering and Computer Science Florida Atlantic University (FAU) Boca Raton USA Universidade Federal de Goias Goiania GO BR Inst. de Inf. Univ. Fed. de Goias (UFG) Goiania Brazil

This work extends PneumoCAD, a computer-Aided Diagnosis system for detecting pneumonia in inf.nts using radiographic images [1], with the aim of improving the system's accuracy and robustness. We implement and compare five con-temporary machine learning classifiers, namely: Naïve Bayes, K-Nearest Neighbor (KNN), Support Vector Machines (SVM), Multi-Layer Perceptron (MLP) and Decision Tree, combined with three dimensionality reduction algorithms: Sequential Forward Selection (SFS), Principal Component Analysis (PCA) and Kernel Principal Component Analysis (KPCA). Current results demonstrate that Naïve Bayes classifier combined with KPCA produces the best overall results.

关键词： Diseases Lungs Accuracy Principal component analysis Diagnostic radiography Pediatrics computer aided diagnosis

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Sensitivity analysis of conductor current-temperature calculations

Sensitivity analysis of conductor current-temperature calcul...

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2013 26th IEEE Canadian Conference on Electrical and computer engineering, CCECE 2013

作者： Šiler, Milan Heckenbergerová, Jana Musilek, Petr Redway, James Dept. of Mathematics and Physics Faculty of El. Eng. and Inf. University of Pardubice Czech Republic Dept. of Electrical and Computer Engineering University of Alberta Edmonton AB Canada Faculty of Electrical Engineering and Computer Science VŠB-TU Ostrava Czech Republic

ISBN: (纸本)9781479900329

Power transmission lines are often used very inefficiently. A possible way to increase their effectiveness is the use of dynamic thermal rating, instead of the more common static rating. Dynamic thermal rating can be calculated from actual conductor load and ambient weather conditions using methodology described in IEEE Std. 738-2006. Main purpose of the presented study is to perform a sensitivity analysis of individual variables participating in dynamic thermal rating calculations. The effects of selected input variables on conductor current-carrying capacity and temperature are described as functional dependence using 2D plots. Individual parameters are then ranked according to their inf.uence on the conductor thermal state. © 2013 IEEE.

关键词： Sensitivity analysis

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How to use attribute-based encryption to implement role-based access control in the cloud

How to use attribute-based encryption to implement role-base...

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2013 1st International Workshop on Security in Cloud Computing, Cloud Computing 2013

作者： Zhu, Yan Ma, Di Hu, Chang-Jun Huang, Dijiang Computer and Communication Engineering University of Science and Technology Beijing 30 Xueyuan Rd Haidian Beijing 100083 China Computer and Information Science University of Michigan-Dearborn 4901 Evergreen Rd Dearborn MI 48128 United States Computing Inf. and Decision Systems Engineering Arizona State University 699 S. Mill Avenue Tempe AZ 85281 United States

ISBN: (纸本)9781450320672

This paper addresses how to construct a RBAC-compatible attribute-based encryption (ABE) for secure cloud storage, which provides a user-friendly and easy-to-manage security mechanism without user intervention. Similar to role hierarchy in RBAC, attribute lattice introduced into ABE is used to define a seniority relation among all values of an attribute, whereby a user holding the senior attribute values acquires permissions of their juniors. Based on these notations, we present a new ABE scheme called Attribute-Based Encryption with Attribute Lattice (ABE-AL) that provides an efficient approach to implement comparison operations between attribute values on a poset derived from attribute lattice. By using bilinear groups of composite order, we propose a practical construction of ABE-AL based on forward and backward derivation functions. Compared with prior solutions, our scheme offers a compact policy representation solution, which can significantly reduce the size of privatekeys and ciphertexts. Furthermore, our solution provides a richer expressive power of access policies to facilitate flexible access control for ABE scheme. © 2013 ACM.

关键词： Access control

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Object tracking using joint enhanced color-texture histogram

Object tracking using joint enhanced color-texture histogram

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International Conference on Image inf.rmation Processing

作者： Manoj Diwakar Pawan Kumar Patel Kunal Gupta Chetan Chauhan Department of Computer Science & Engineering DIT University Dehradun India Department of Computer Science & Engineering IIT Kanpur India Department of Information technology HCT Muscat Oman Dept. of Inf. Technol. HCT Muscat Oman

Object tracking is an important task within the field of computer vision. There are two key steps in video analysis: detection of interesting moving objects and tracking of such objects from frame to frame. Mean shift object tracking algorithm is a feature based algorithm. In this paper color inf.rmation of object are extracted as well as texture inf.rmation is also extracted by using local binary pattern technique to represent the object. In joint color-texture histogram region of interest is extracted and then edges and corners are extracted from the region of interest. Color histogram is insensitive to nondeformation and partial occlusion but it does not perform well when in case of color aberration. To overcome this drawback Local Binary Pattern method is used. This feature makes this algorithm more efficient in comparison of color histogram algorithm.

关键词： Feature extraction Image color analysis Histograms Target tracking Object tracking Mathematical model Joints

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Coordinate Signal Control in Trunk Road Based on Genetic BP Neural Network

Coordinate Signal Control in Trunk Road Based on Genetic BP ...

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International Conference on Instrumentation, Measurement, computer, Communication and Control (IMCCC)

作者： Shao-Jiao Lv Chun-gui Li Zhe-ming Li Dept. of Electr. & Inf. Eng. Guangxi Univ. of Sci. & Technol. Liuzhou Liuzhou China Department of Computer Engineering Guangxi University of Science and Technology Liuzhou China

ISBN: (纸本)9781479913930

To achieve a minimal time to through the urban traffic trunk road. However, the traditional analytical algorithm can not be applied in actual traffic widely. By combining the genetic BP neural network with the traditional analytical, A novel dynamic two-direction green wave coordinate control strategy was proposed, which applied in solving the function optimization problem. Finally, the new algorithm is compared with the existing algorithms for simulation experiments, The experiment results shows that the method on convergence and optimization results were improved.

关键词： Neural networks Heuristic algorithms Genetics Algorithm design and analysis Roads Educational institutions Optimization

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Requirements-driven qualitative adaptation

Requirements-driven qualitative adaptation

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Confederated International Conferences on On the Move to Meaningful Internet Systems, OTM 2012: CoopIS, DOA-SVI, and ODBASE 2012

作者： Souza, Vítor E. Silva Lapouchnian, Alexei Mylopoulos, John Department of Inf. Engineering and Computer Science University of Trento Italy

ISBN: (纸本)9783642336058

Coping with run-time uncertainty pose an ever-present threat to the fulfillment of requirements for most software systems (embedded, robotic, socio-technical, etc.). This is particularly true for large-scale, cooperative inf.rmation systems. Adaptation mechanisms constitute a general solution to this problem, consisting of a feedback loop that monitors the environment and compensates for deviating system behavior. In our research, we apply a requirements engineering perspective to the problem of designing adaptive systems, focusing on developing a qualitative software-centric, feedback loop mechanism as the architecture that operationalizes adaptivity. In this paper, we propose a framework that provides qualitative adaptation to target systems based on inf.rmation from their requirements models. The key characteristc of this framework is extensibility, allowing for it to cope with qualitative inf.rmation about the impact of control (input) variables on indicators (output variables) in different levels of precision. Our proposal is evaluated with a variant of the London Ambulance System case study. © 2012 Springer-Verlag.

关键词： Adaptive systems

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A Method of State Addreviation for Verification of Class Model

A Method of State Addreviation for Verification of Class Mod...

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WRI World Congress on Software engineering, WCSE

作者： Soo-Kyung Choi Byungho Park Robert Young Chul Kim Young B. Park Dept. Computer Science & Engineering University of Dankook Cheonan Republic of Korea Dept. CIC(Computer and Information Communication) University of Hongik Sejong Campus Republic of Korea Dept. Comput. & Inf. Commun. Univ. of Hongik Sejong South Korea

The Software defect management has become a critical issue with its increasing importance in sensor networks area. In this paper, it focuses on black box approach. Software defects can be found through model based testing. A state diagram is a good dynamic model that can test such a logical error of execution. However, the state diagram has a problem of complexity on the existing states and transitions. It is necessary to derive a state diagram in state based testing and find a method to solve its complexity problems. In order to use state diagram in software testing, its complexity has to be solved without the change of state and transition. This paper suggests a new notation called STMT (State Transition Mapping Tree) to solve the derived complexity without changing the state or transition. It also proposes an STMT automatic generation technique to derive a state diagram from a Java source code automatically. The suggested diagram can improve complexities partially, compared with UML state diagram.

关键词： Unified modeling language Complexity theory Java Audio systems Syntactics Software testing Software

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Sensitivity analysis of conductor current-temperature calculations

Sensitivity analysis of conductor current-temperature calcul...

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Canadian Conference on Electrical and computer engineering (CCECE)

作者： Milan Šiler Jana Heckenbergerová Petr Musilek James Rodway Faculty of El. Eng. and Inf. University of Pardubice Czech Republic Faculty of Electrical Engineering and Computer Science VÅB-TU Ostrava Czech Republic University of Alberta Edmonton AB Canada University of Alberta Edmonton AB CA

关键词： Conductors Thermal conductivity Temperature sensors IEEE standards Meteorology Temperature dependence Power transmission lines

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Performance and Power Estimation for Mobile-Cloud Applications on Virtualized Platforms

Performance and Power Estimation for Mobile-Cloud Applicatio...

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International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing (IMIS)

作者： Shih-Hao Hung Fu-Tien Liang Chia-Heng Tu Norman Chang Inst. for Inf. Ind. Smart Network Syst. Inst. Taipei Taiwan Department of Computer Science and Information Engineering National Taiwan University Taipei Taiwan Smart Network System Institute Institute for Information Industry Taipei Taiwan

ISBN: (纸本)9781467362290

Performance optimization and energy-saving have become major challenges for both hardware designers and software developers of mobile systems due to limited battery capacities. Analysis of the performance and power consumption in such a system and employment of energy-saving techniques as early as possible are keys to competitive products designs. With virtual platforms powered by simulation/emulation engines to help hardware designers in the early design stages for verifying the functional correctness of a hardware design or testing software applications before the hardware is ready, we propose a framework to further support hardware/software co-design with advanced performance and power analysis facilities. Our case studies and experimental results show that our framework can reflect the performance and power behavior of mobile-cloud applications and help hardware/software designers in reducing the energy consumption on these systems.

关键词： Hardware Software Computational modeling Mathematical model Power demand Timing Performance evaluation

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Video saliency detection in the compressed domain

Video saliency detection in the compressed domain

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20th ACM International Conference on Multimedia, MM 2012

作者： Fang, Yuming Lin, Weisi Chen, Zhenzhong Tsai, Chia-Ming Lin, Chia-Wen School of Computer Engineering Nanyang Technological University Singapore Singapore School of Electrical and Electronic Engineering Nanyang Technological University Singapore Singapore Department of Computer Science and Inf. Engineering National Chung Cheng University Chiayi Taiwan Department of Electrical Engineering National Tsing Hua University Hsinchu Taiwan

ISBN: (纸本)9781450310895

Saliency detection is widely used to extract the regions of interest in images. Many saliency detection models have been proposed for videos in the uncompressed domain. However, videos are always stored in the compressed domain such as MPEG2, H.264, MPEG4 Visual, etc. In this study, we propose a video saliency detection model based on feature contrast in the compressed domain. Four features of luminance, color, texture and motion are extracted from DCT coefficients and motion vectors in the video bitstream. The static saliency map of video frames is calculated based on the luminance, color and texture features, while the motion saliency map for video frames is computed by motion feature. The final saliency map for video frames is obtained through combining the static saliency map and motion saliency map. Experimental results show good performance of the proposed video saliency detection model in the compressed domain. © 2012 ACM.

关键词： Luminance

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