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Reports of the AAAI 2011 conference workshops

Reports of the AAAI 2011 conference workshops

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作者： Agmon, Noa Agrawal, Vikas Aha, David W. Aloimonos, Yiannis Buckley, Donagh Doshi, Prashant Geib, Christopher Grasso, Floriana Green, Nancy Johnston, Benjamin Kaliski, Burt Kiekintveld, Christopher Law, Edith Lieberman, Henry Mengshoel, Ole J. Metzler, Ted Modayil, Joseph Oard, Douglas W. Onder, Nilufer O'Sullivan, Barry Pastra, Katerina Precup, Doina Ramachandran, Sowmya Reed, Chris Sariel-Talay, Sanem Selker, Ted Shastri, Lokendra Singh, Satinder Smith, Stephen F. Srivastava, Siddharth Sukthankar, Gita Uthus, David C. Williams, Mary-Anne Department of Computer Science University of Texas at Austin United States Center for Knowledge Driven Information Systems Infosys Labs India Adaptive Systems Section Naval Research Laboratory Washington DC United States Department of Computer Science University of Maryland College Park United States EMC's Center of Excellence in Ireland Research Europe at EMC Ireland Department of Computer Science University of Georgia United States School of Informatics University of Edinburgh United Kingdom Department of Computer Science University of Liverpool United Kingdom Department of Computer Science University of North Carolina Greensboro United States Faculty of Engineering and Information Technology University of Technology Sydney Australia VeriSign Inc. United States Department of Computer Science University of Texas at El Paso United States Machine Learning Department Carnegie Mellon University United States Massachusetts Institute of Technology Media Laboratory United States Carnegie Mellon University's Silicon Valley Campus United States Darrell W. Hughes Program for Religion and Science Dialogue Oklahoma City University United States Department of Computing Science University of Alberta Canada College of Information Studies Institute for Advanced Computer Studies University of Maryland College Park United States Department of Computer Science Michigan Technological University United States Department of Computer Science University College Cork Ireland Cognitive Systems Research Insitute Athens Greece School of Computer Science McGill University Canada Stottler Henke Inc. United States School of Computing University of Dundee United Kingdom Department of Computer Engineering Istanbul Technical University Turkey Convergence Lab Infosys Technologies Ltd. United States Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor United States Robotics Institute Carnegie Mellon University United States University of Wisconsin

The AAAI-11 workshop program was held Sunday and Monday, August 7-18, 2011, at the Hyatt Regency San Francisco in San Francisco, California USA. The AAAI-11 workshop program included 15 workshops covering a wide range of topics in artificial intelligence. The titles of the workshops were Activity Context Representation: Techniques and Languages;Analyzing Microtext;Applied Adversarial Reasoning and Risk Modeling;Artificial Intelligence and Smarter Living: The Conquest of Complexity;Artifiicial Intelligence for Data Center Management and Cloud Computing;Automated Action Planning for Autonomous Mobile Robots;Computational Models of Natural Argument;Generalized Planning;Human Computation;Human-Robot Interaction in Elder Care;Interactive Decision Theory and Game Theory, 2010;Language-Action Tools for Cognitive Artificial Agents: Integrating Vision, Action, and Language;Lifelong Learning from Sensorimotor Experience;Plan, Activity, and Intent Recognition;and Scalable Integration of Analytics and Visualization. This article presents short summaries of those events. Copyright © 2012, Association for the Advancement of Artificial Intelligence. All rights reserved.

关键词： Human robot interaction

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Convex hull manipulation based control performance optimization: Case study of impedance model with feedback delay

Convex hull manipulation based control performance optimizat...

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International Symposium on Applied Machine Intelligence and Informatics (SAMI)

作者： Patricia Grof Péter Galambos Péter Baranyi Computer and Automation Research Institute Hungarian Academy of Sciences (ATOMKI) Budapest Hungary Department of Mechatronics Optics and Information Engineering Budapest University슠of슠Technology슠and슠Economics Hungary Department of Telecommunications and Media Informatics Budapest University슠of슠Technology슠and슠Economics Hungary

Varying delay is still a challenge to handle in the comtrol of systems with feedback delay. This paper attempt to handle varying delay by a novel approach. The control structure has been already proposed, where the system with feedback delay is approximated by a non-delayed model with modified time constants. The controller is designed according to this non-delayed substitute system and the control signal is computed using its observed state vector. Tensor Product (TP) Model Transformation is utilized to make a compact polytopic representation of the observer and controller for various time delays. In this method the actual value of the feedback delay is considered as an input parameter of the TP type controller and observer. In this paper we show that the convex hull of Convex type TP model applied for LMI based controller design has effect on control performance. We introduce a concept how to improve the control performance of the system with feedback delay via convex hull manipulation.

关键词： Delay Observers Computational modeling Impedance Delay effects Tensile stress Stability analysis

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Localization scenario with active sensing for range measurements

Localization scenario with active sensing for range measurem...

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Workshop on Positioning, Navigation and Communication, WPNC

作者： Michailas Romanovas Justinas Trapnauskas Lasse Klingbeil Martin Traechtler Yiannos Manoli Institute of Microsystems and Information Technology (IMIT) Hahn-Schickard-Gesellschaft Villingen-Schwenningen Germany Department of Computer Engineering Vilnius Gediminas Technical University Vilnius Lithuania Fritz Huettinger Chair of Microelectronics Department of Microsystems Engineering-IMTEK University of Freiburg Freiburg im Breisgau Germany

The work presents the development and evaluation of uncertainty-based range measurement selection criteria for active sensing within a localization scenario. The simulated setup consists of a mobile unit equipped with a gyroscope, an incremental encoder, and being capable to measure the distance to a finite number of stationary anchors with known positions and associated position uncertainties. The work discusses several major methods for anchor selection based on expected uncertainty minimization and compares them to heuristics methods. The developed techniques are evaluated for non-ideal anchor scenario and different measurement rates.

关键词： Uncertainty Noise Sensors Covariance matrix Minimization Gyroscopes Noise measurement

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Practical privacy for value-added applications in vehicular ad hoc networks 5th

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5th International Conference on Internet and Distributed Computing Systems, IDCS 2012

作者： Zhang, Lei Wu, Qianhong Qin, Bo Domingo-Ferrer, Josep Shanghai Key Laboratory of Trustworthy Computing Software Engineering Institute East China Normal University Shanghai China UNESCO Chair in Data Privacy Dept. of Comp. Eng. and Maths Universitat Rovira i Virgili TarragonaCatalonia Spain Key Lab. of Aerospace Information Security and Trusted Computing Ministry of Education Wuhan University School of Computer China Department of Maths School of Science Xi’an University of Technology China

ISBN: (纸本)9783642348822

Advances in mobile networking and information processing technologies have triggered vehicular ad hoc networks (VANETs) for traffic safety and value-added applications. Most efforts have been made to address the security concerns while little work has been done to investigate security and privacy for value-added applications in VANETs. To fill this gap, we propose a value-added application, specifically, a security and privacy preserving location-based service (LBS) scheme for VANETs. For each LBS transaction, the scheme provides authentication, integrity and non-repudiation for both the service provider and the user. A user can obtain the service in an anonymous way and hence user privacy is well protected. However, a tracing procedure can be invoked to find malicious users, thereby efficiently preventing users from abusing the anonymity provided by the system. © Springer-Verlag Berlin Heidelberg 2012.

关键词： Location based services

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Generating emphasis from neutral speech using hierarchical perturbation model by decision tree and support vector machine

Generating emphasis from neutral speech using hierarchical p...

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International Conference on Audio, Language and Image Processing, ICALIP

作者： Fanbo Meng Zhiyong Wu Helen Meng Jia Jia Lianhong Cai Tsinghua National Laboratory for Information Science and Technology (TNList) Department of Computer Science and Technology Tsinghua University Beijing China Department of Systems Engineering and Engineering Management The Chinese University of Hong Kong Hong Kong China Tsinghua-CUHK Joint Research Center for Media Sciences Technologies and Systems Graduate School at Shenzhen Tsinghua University Shenzhen China Tsinghua University Beijing Beijing CN

In a computer-aided pronunciation training (CAPT) system, corrective feedback is desired to provide contrastive comparisons between user's and canonical pronunciations. This paper presents a hierarchical perturbation model to generate emphasis for English by modifying acoustic features of neutral speech to highlight such important speech segments. Synthesis of emphasis needs to be realized hierarchically at word, syllable and phone layers. A two-pass decision tree is constructed to cluster acoustic variations between emphatic and neutral speeches. The questions for decision tree construction are designed according to the above layers. The questions related to word and syllable layers are used to construct the main tree and then the questions related to phone layer are used to expand the leaves of main tree (deriving a set of subtrees). Support vector machines (SVMs) are used to predict acoustic variations for all the leaves of main tree (at word and syllable layers) and sub-trees (at phone layer). Experiments indicate that the proposed hierarchical perturbation model can generate emphatic speech with high quality for both naturalness and emphasis.

关键词： Speech Acoustics Decision trees Support vector machines Training Feature extraction Reactive power

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Detection and emphatic realization of contrastive word pairs for expressive text-to-speech synthesis

Detection and emphatic realization of contrastive word pairs...

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International Symposium on Chinese Spoken Language Processing

作者： Chunrong Li Zhiyong Wu Fanbo Meng Helen Meng Lianhong Cai Tsinghua-CUHK Joint Research Center for Media Sciences Technologies and Systems Graduate School at Shenzhen Tsinghua University Shenzhen China Tsinghua National Laboratory for Information Science and Technology (TNList) Department of Computer Science and Technology Tsinghua University Beijing China Department of Systems Engineering and Engineering Management Chinese University of Hong Kong Shatin New Territories Hong Kong China Tsinghua University Beijing Beijing CN

This paper addresses the problem of automatic detection of contrastive word pairs and their acoustic realization in emphasis for expressive text-to-speech (TTS) synthesis in English. Support vector machines (SVMs) have been used to automatically detect contrastive word pairs from lexical features, syntactic dependencies and semantic relations. A much better performance is achieved by adding accent ratio and word identity features. Hidden Markov model (HMM) based speech synthesis is then used to generate emphatic speeches by putting emphasis on the detected contrastive word pairs. Subjective experiments show that most of the listeners consider putting emphasis on contrastive word pairs is more acceptable than on non-contrastive word pairs. This indicates the importance of the accurate detection of contrastive word pairs.

关键词： Hidden Markov models Speech Feature extraction Semantics Speech synthesis Support vector machines Syntactics

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On Active Sensing methods for localization scenarios with range-based measurements

On Active Sensing methods for localization scenarios with ra...

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International Conference on Multisensor Fusion and Integration for Intelligent Systems (MFI)

作者： Justinas Trapnauskas Michailas Romanovas Lasse Klingbeil Ahmed Al-Jawad Martin Traechtler Yiannos Manoli Department of Computer Engineering Vilnius Gediminas Technical University Lithuania Hahn-Schickard-Gesellschaft e.V. Institute of Microsystems and Information Technology Villingen-Schwenningen Germany Institute of Geodesy and Geoinformation Rheinische Friedrich-Wilhelms-Universitaet Bonn Germany Fritz Huettinger Chair of Microelectronics Department of Microsystems Engineering (IMTEK) Albert-Ludwigs-Universitat Freiburg Germany

The work demonstrates how the methods of Active Sensing (AS), based on the theory of optimal experimental design, can be applied for a location estimation scenario. The simulated problem consists of several mobile and fixed nodes where each mobile unit is equipped with a gyroscope and an incremental path encoder and is capable to make a selective range measurement to one of several fixed anchors as well as to other moving tags. All available measurements are combined within a fusion filter, while the range measurements are selected with one of the AS methods in order to minimize the position uncertainty under the constraints of a maximum available measurement rate. Different AS strategies are incorporated into a recursive Bayesian estimation framework in the form of Extended Kalman and Particle Filters. The performance of the fusion algorithms augmented with the active sensing techniques is discussed for several scenarios with different measurement rates and a number of fixed or moving tags.

关键词： Uncertainty Time measurement Noise Covariance matrix Sensors Gyroscopes Measurement uncertainty

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Research on classification of apple level based on neural network

Research on classification of apple level based on neural ne...

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2011 Cross Strait Quad-Regional Radio Science and Wireless technology Conference, CSQRWC 2011

作者： Zhang, Genshan Duan, Liying Tian, Hong Guan, Huiming School of Literature and Media Transmission Shijiazhuang University Shijiazhuang China Department of Computer Shijiazhuang University Shijiazhuang China Department of Information Engineering Beijing University of Technology Tongzhou College Beijing China

ISBN: (纸本)9781424497904

For the shortage of artificial methods in classification of apple level, a method of classification of apple level based on BP artificial neural networks is presented. Artificial neural network provides technical means for research on apple classification,because it can provide nonlinear mapping of the input vector and output vector with arbitrary dimension, and also can reach any nonlinear continuous system. The BP neural network model is established for the classification by taking feature parameters as input vectors and apple level as output vectors. The results has shown that the classification precision of model is very high, and which has good application in realizing automatic identification of apple level. © 2011 IEEE.

关键词： Neural networks

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Gamification towards sustainable mobile application

Gamification towards sustainable mobile application

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2011 5th Malaysian Conference in Software engineering, MySEC 2011

作者： Law, Foong Li Kasirun, Zarinah Mohd Gan, Chun Kiat Department of Computing School of Computing Communication and Media Studies KDU University College 47400 Petaling Jaya Malaysia Department of Software Engineering Faculty of Computer Science and Information Technology University of Malaya 50603 Kuala Lumpur Malaysia

ISBN: (纸本)9781457715310

Gamification is not a newly emerging concept. Perhaps, it is a new term to some people. Gamification is a powerful new strategy to influence and motivate groups of people. It applies game mechanics to non-game activities to change the user's behavior of an application. It improves the engagement of user by keeping score of points earned through various activities on the application. The recent gamified websites or a related service such as Foursquare is a location-based application that pinpoints where you are and your activities. Users of the Foursquare can "check in" to various locations on their mobile phones and gain incentives like badges or deals. Gamification is utilised as a mean to build up user loyalty, and not so much to gain their long-term engagement. This article discusses how the gamification can help to drive the sustainability after a mobile application has been delivered and is in use. It is important to make mobile application continuously visible and sustainable if the concept of gamification has been used correctly. The more users can gain from the virtual and tangible rewards of using our application, the more we can be rewarded from our users. It also discusses how adding a "game layer" has improved the basic functions in society like educating people to become more responsible and helpful and use badges as virtual reward to users who contribute photos. Interactive mobile application designed to change the way of people report road accident cases with applying a simplicity and convenience principles. For instance, user just needs to snap photo and touch on screen to report a road accident case. © 2011 IEEE.

关键词： Roads and streets

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Dimensioning and site planning of integrated PON and wireless cooperative networks for fixed mobile convergence

Dimensioning and site planning of integrated PON and wireles...

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作者： Lin, Bin Tapolcai, János Ho, Pin-Han Department of Information Science and Technology Dalian Maritime University Dalian 116026 China Department of Telecommunication and Media Informatics Budapest University of Technology and Economics Budapest 1117 Hungary Department of Electrical and Computer Engineering University of Waterloo Waterloo ON N2L 3G1 Canada

Integrating optical and wireless broadband access networks is an important step in achieving fixed mobile convergence in metropolitan areas. In this paper, a promising network architecture by integrating a passive optical network and a wireless cooperative network is investigated, in which intercell cooperative transmission is incorporated. Our goal is to exploit both economic and performance benefits. To achieve a cost-effective deployment and meet long-term performance requirements, this paper addresses the issue of dimensioning and site planning (DSP). We provide a complete formulation to capture the challenges behind network deployment. A number of long-term design subjects are jointly considered in a unified optimization framework, including infrastructure placement, base station user allocation, and resource breakdown assignment. To reduce the computation complexity, the DSP problem is decomposed into two subproblems. An approach is further developed to reformulate the problem into a solvable mixed integer linear program. Moreover, we conduct case studies to validate the formulation, in which performance gains are demonstrated in terms of total infrastructure cost reduction, spectral efficiency improvement, and scalability in capacity enhancement. © 2011 IEEE.

关键词： Passive optical networks

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