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H.264 deblocking filter enhancement

H.264 deblocking filter enhancement

引用

International Conference on computer engineering and systems

作者： Waseim Hashem Mahjoub Hossam Osman Gamal M. Aly Software Engineering Competence Center Information Technology Industry Development Agency Smart Village Giza Egypt Department of Computer Engineering and Systems Ain Shams University Cairo Egypt

This paper proposes new software-based techniques for speeding and reducing the complexity of the deblocking filter used in the state-of-the-art H.264 international video coding standard to improve the visual quality of the decoded video frames. The proposed techniques are classified as standard-compliant and standard-noncompliant techniques. The standard-compliant techniques optimize the standard filter through optimizing the boundary strength calculation and group filtering of macroblocks. The standard-noncompliant techniques predict the new boundary strength and edge detection conditions from previous values. Experimental results on both an embedded platform and a desktop PC show significant increment in performance improvement that reaches 47% for the standard-compliant techniques and 80% for the standard-noncompliant techniques. They also demonstrate that for standard-noncompliant techniques the quality degradation computed using the Peak Signal to Noise Ratio is insignificant.

关键词： Equations Vectors Mathematical model Filtering Transform coding

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A UWB imaging system to detect early breast cancer in heterogeneous breast phantom

A UWB imaging system to detect early breast cancer in hetero...

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International Conference on Electrical, Control and computer engineering (INECCE)

作者： Saleh Alshehri Adznan Jantan R.S.A. Raja Abdullah Rozi Mahmud Sabira Khatun Zaiki Awang Department of Computer and Communication systems Engineering Faculty of Engineering Universiti Putra Malaysia Serdang Malaysia Department of Imaging Faculty of Medicine and Health Sciences Universiti Putra Malaysia Serdang Malaysia Department of Computer Systems & Networks Faculty of Computer systems & Software Engineering Universiti Malaysia Pahang Pahang Malaysia Microwave Technology Center Faculty of Electrical Engineering Universiti Teknologi MARA Shah Alam Selangor Darul Ehsan Malaysia

This paper presents an experimental early breast cancer detection system in terms of heterogeneous breast phantom. The system consists of commercial Ultrawide-Band (UWB) transceivers and our developed Neural Network (NN) based Pattern Recognition (PR) software for imaging. A simple way to construct cancer- tissue and heterogeneous breast phantom using available low cost materials and their mixtures is also proposed here. The materials are: (i) A mixture of petroleum jelly, soy oil, wheat flour and water as heterogeneous tissue; (ii) A particular glass as skin; and (iii) A specific mixture of water and wheat flour as cancer- tissue. All the materials and their mixtures are considered according to the ratio of the dielectric properties of the breast tissues. To experimentally detect cancer, the UWB signals are transmitted from one side of the breast phantom and received from opposite side diagonally. By using discrete cosine transform (DCT) of the received signals, a Neural Network (NN) is trained, tested and interfaced with the UWB transceiver to form the complete system. The achieved detection rate of cancer cell's existence, size and location are approximately 100%, 93.1% and 93.3% respectively.

关键词： Breast Tumors Dielectrics Cancer Microwave imaging Materials

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Web farm-inspired computational cluster in the cloud

Web farm-inspired computational cluster in the cloud

引用

2011 3rd IEEE International Conference on Cloud Computing Technology and Science, CloudCom 2011

作者： Rice, Justin L. Phoha, Vir V. Cappelaere, Pat Mandl, Dan Department of Computer Science Louisiana Tech University 600 West Arizona Ruston LA 71272 United States Vightel Corporation 8303 Winter Wind Court Ellicott City MD 21043 United States Software Systems Engineering NASA GSFC 8800 Greenbelt Rd. Greenbelt MD 20771 United States

ISBN: (纸本)9780769546223

In this paper, we introduce a web farm-inspired framework for dynamic and concurrent computational processing in the cloud. We compare and contrast this with the Hadoopcloud framework, discuss the main problems associated with our approach, and give suggestions on ways to overcome said challenges. To implement the web-inspired framework, we use *** - a lightweight, single threaded, server-side framework which uses asynchronous callbacks to allow non-dependent operations (parallel-like sections) to execute while waiting for I/O events such as "fetching a file" or "writing a file to disk." We perform experiments to reveal two preliminary results that showcase the framework's functionality and scalability. One, for non-blocking operations, worker nodes which use *** servers are significantly faster than those which use traditional servers. In particular, a single *** is (on average) 2.11 times faster than one Ruby Webrick server, and is (on average) 1.88 times faster than two Ruby Webrick servers. Two, we find that increasing the number of worker nodes improves overall performance for blocking computational operations. As the number of worker nodes increase, the total execution time decreases exponentially and the number of requests per second increases linearly. © 2011 IEEE.

关键词： Cluster computing

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Security challenges in reactive Mobile Ad Hoc Network

Security challenges in reactive Mobile Ad Hoc Network

引用

IEEE India Conference (INDICON)

作者： Chinmay Ghosh Debasish Jana Bijan Bihari Bhaumik Connectiva Systems (I) Private Limited Kolkata India TEOCO Software Private Limited Kolkata India Department of Computer Sc & Engineering Jadavpur University Kolkata India

Mobile Ad Hoc Network (MANET) has become significantly important to support self-organizing roaming computing with changing links to neighboring hosts. The topology is changed so rapidly, finding a routing path is a challenge in reactive protocol methodology. Securing ad hoc networks is infamously challenging, notably due to the lack of an online infrastructure. MANET poses a number of security challenges due to changeable topology, wireless shared medium, diverse resources and inflexible resource constraints etc. In this paper, we present an elaborate view of issues of MANET with emphasis on security challenges in reactive protocol with different dimensions like secure routing, secured key management and trust management through reputation in order to detect intrusion and protect.

关键词： Routing Routing protocols Security Mobile ad hoc networks Peer to peer computing

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Design of a robot cloud center

Design of a robot cloud center

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International Workshop on Assurance in Distributed systems and Networks

作者： Du, Zhihui Yang, Weiqiang Chen, Yinong Sun, Xin Wang, Xiaoying Xu, Chen Tsinghua National Laboratory for Information Science and Technology Department of Computer Science and Technology Tsinghua University 100084 Beijing China School of Software and Microelectronics Peking University 102600 Beijing China School of Computing Informatics and Decision Systems Engineering Arizona State University Tempe AZ 85287 United States Department of Computer Technology and Application Qinghai University Xining Qinghai 810016 China International School Beijing University of Posts and Telecommunications 102209 Beijing China

ISBN: (纸本)9780769543499

Service-oriented architecture and cloud computing have become the prevalent computing paradigm. In this paradigm, computing resources can be accessed like other utility services available in today's society. In the meantime, robotics applications are joining the trend. More and more robot applications are shifting from manufacture to non-manufacture and service industries. However, for the on-demand supply of the large-scale heterogeneous robots, It is still a problem have not yet been studied, including the fundamental management and efficiency issues in using of these resources. In this paper, we design a framework of "Robot Cloud Center" (RCC) following the general cloud computing paradigm to address the current limitations in capacity and versatility of robotic applications. In this framework, a robot can be provided as a service just like a public utility service so that everyone can access the powerful robotic services easily, efficiently, and cheaply. Based on a given scenario, a robot scheduling algorithm in RCC is proposed to take advantage of the heterogeneous robot resources to meet the end user's requirement with the minimum cost.

关键词： Robot programming

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Open learning: Advances in the eMadrid excellence network

Open learning: Advances in the eMadrid excellence network

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IEEE Education engineering (EDUCON)

作者： Carlos Delgado Kloos Pilar Sancho Gregorio Robles Manuel Castro Edmundo Tovar Department Telematic Engineering Universidad Carlos III de Madrid Madrid Spain Department Software Engineering & AI Universite Complutense de Madrid Madrid Spain Department Telematic System & Computing University of Rey Juan Carlos Madrid Spain Department Electrical & Computer Engineering University Nacional de Educación a Distancia Madrid Spain Department Computer Languages and Systems & Software Engineering Universite Politécnica de Madrid Madrid Spain

This Special Session is going to present some of the activities carried out by the Excellence Network on e-learning that is being funded in the Region of Madrid, called eMadrid. They are related to the application of ... 详细信息

关键词： software engineering education Least squares approximation computer architecture Semantics Semantic Web

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A conceptual framework for semantic case-based safety analysis

A conceptual framework for semantic case-based safety analys...

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International Conference on Emerging Technologies and Factory Automation (ETFA)

作者： Olawande Daramola Tor Stålhane Thomas Moser Stefan Biffl Department of Computer and Information Science Norwegian University of Science and Technology Norway Christian Doppler Laboratory for Software Engineering Integration for Flexible Automation Systems Vienna University of Technology Austria

Hazard and Operability (HAZOP) Analysis and Failure Mode and Effect Analysis (FMEA) are among the most widely used safety analysis procedures in the development of safety-critical and embedded systems. These analyses are generally perceived as complex and time-consuming, hindering an effective reuse of previous results or experiences. In this paper we present a conceptual semantic case-based framework for safety analysis, which facilitates the reuse of previous HAZOP and FMEA experiences in order to reduce the time and effort associated with these analyses. We present the core technologies of the conceptual framework and evaluated a prototype of the framework, KROSA, in an experiment with domain experts at ABB Norway. Initial results confirm the viability of the conceptual framework for industrial application.

关键词： Ontologies Semantics Natural language processing Libraries Hazards Humans

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A Lyapunov approach in incremental stability

A Lyapunov approach in incremental stability

引用

IEEE Conference on Decision and Control

作者： Majid Zamani Rupak Majumdar Department of Electrical Engineering University of California Los Angeles CA USA Max Planck Institute for Software Systems Kaiserslautern Germany Department of Computer Science University of California Los Angeles CA USA

ISBN: (纸本)9781612848006;9781612848013

The notion of incremental stability was proposed by several researchers as a strong property of dynamical and control systems. Incremental stability describes the convergence of trajectories with respect to themselves, rather than with respect to an equilibrium point or a particular trajectory. Similarly to stability, Lyapunov functions play an important role in the study of incremental stability. In this paper, we propose new notions of incremental Lyapunov functions which are coordinate independent and provide the description of incremental stability in terms of the proposed Lyapunov functions. Moreover, we develop a backstepping design approach providing a recursive way of constructing controllers, enforcing incremental stability, as well as incremental Lyapunov functions. The effectiveness of the proposed method is illustrated by synthesizing a controller rendering a single-machine infinitebus electrical power system incrementally stable.

关键词： Lyapunov methods Asymptotic stability Power system stability Measurement Backstepping State feedback

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Transmission reduction based on order compression of compound aggregate data over wireless sensor networks

Transmission reduction based on order compression of compoun...

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International Conference on Pervasive Computing and Applications (ICPCA)

作者： Chi Yang Zhimin Yang Kaijun Ren Chang Liu School of Computer SCIence and Software Engineering University of Western Australia Crawley WA Australia Department of Computer Shandong University Weihai China College of Computer National University of Defense Technology Changsha Hunan China CS3-Centre for Complex Software Systems and Services Swinburne University of Technology Melbourne Australia

To reduce the energy consumption and maximize the lifetime of the wireless sensor network (WSN), different techniques are developed to reduce the communication over WSN. However, it is also critical to discuss the energy cost problems in computing and maintaining the information of aggregate queries. Currently, some in-network temporal data suppression techniques are developed for more efficiently processing data aggregation queries over WSN. With those techniques, a data source node which sends data only forwards newly collected data with its value changing beyond predefined constants, ± ε to a data aggregate node which receives data. Otherwise, an aggregate node can infer the absent data report of a source node from the data history of the same source node. In order to further reduce the data communication, hence the energy consumption of the In-network temporal data suppression techniques, in this paper, a technique which makes use the order relationship of compound sensor data is proposed to compress data size during the In-network prediction. An empirical study is carried out to show the performance gains of the proposed techniques optimized by order compression comparing to the previous In-network prediction technique.

关键词： Wireless sensor networks Educational institutions

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Integration of cultural dimensions into software localisation testing of assistive technology for deaf children

Integration of cultural dimensions into software localisatio...

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Malaysian Conference in software engineering (MySEC)

作者： Tan Ping Ping Chiu Po Chan Hamizan Sharbini Azlina Ahmadi Julaihi Department of Computing & Software Engineering Faculty of Computer Science and Information Technology Universiti Malaysia Sarawak Malaysia Department of Information Systems Faculty of Computer Science and Information Technology Universiti Malaysia Sarawak Malaysia Department of Computer System & Communication Technologies Faculty of Computer Science and Information Technology Universiti Malaysia Sarawak Malaysia

Lack of hearing ability hinders deaf children from mastering grammar in language studies. Unfortunately, such software targeting Malay language is limited. This paper attempts to generate new approach in handling such software. These include detection of defects when switching into local languages, date format and accommodating the local laws. The acceptance of international software for local use goes beyond just these aspects. For this purpose, software that supports the multi-languages is evaluated. The main research question of this paper: The lack of cultural dimensions in localisation testing of assistive technology decreases the effectiveness of localisation testing of the localised software. On the account of cultural dimensions, Hofstede's Cultural Dimensions will be experimented to study which cultural dimensions are most suited for such software. From our empirical results, the failure rate of the testing is higher compared to incorporating culture dimensions.

关键词： Testing Cultural differences Usability Information technology computer science User interfaces

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