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检索条件"主题词=Change Detection Algorithms"

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Person tracking on a mobile robot with heterogeneous inter-characteristic feedback

Person tracking on a mobile robot with heterogeneous inter-c...

引用

IEEE International Conference on Robotics and Automation (ICRA)

作者： Juhyun Lee Peter Stone Department of Computer Sciences University of Texas Austin USA

For a mobile robot that interacts with humans such as a home assistant or a tour guide robot, tracking a particular person among multiple persons is a fundamental, yet challenging task. Uniquely identifying characteristics such as a person's face, may not be visible consistently enough to be used as the sole form of identification. Rather, it may be useful to also track more frequently visible, but perhaps less uniquely identifying characteristics such as a person's clothes. After learning various characteristics of a person, the tracking system is required to autonomously update itself with additional training data, since the learned features may change over space and time due to the mobile nature of the robot. In this paper, we introduce a novel algorithm for merging multiple, heterogeneous sub-classifiers designed to track and associate different characteristics of a person being tracked. These heterogeneous classifiers give feedback to each other by identifying additional online training data for one another, thus improving the performance of each classifier and the accuracy of the overall system. Our algorithm has been fully implemented and tested on a Segway base.

关键词： Mobile robots Feedback Training data Orbital robotics Human robot interaction Face detection Testing change detection algorithms Robotics and automation USA Councils

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SOFTWARE DEVELOPMENT TO SPEED UP DISASTER MANAGEMENT WITH REMOTE SENSING

SOFTWARE DEVELOPMENT TO SPEED UP DISASTER MANAGEMENT WITH RE...

引用

IEEE International Geoscience and Remote Sensing Symposium

作者： Stephane Briere David Dubois Richard Lepage Ecole de technologie supérieure Montréal Québec Canada

When a disaster occurs, earth observation specialists must analyze a considerable amount of images as quickly as possible to help rescue teams or to make on-the-fly decisions. As there is currently no remote sensing software that is specific for natural disasters, we propose in this work to determine the basic requirements for such software and develop a test framework for such application. Our approach includes a state of the art review on current earth observation software as well as disaster response needs. We also list requirements based on our review and propose a solution for providing software assistance to photo-interpreters. Finally our test framework is presented.

关键词： Software algorithms Remote sensing change detection algorithms Algorithm design and analysis Graphical user interfaces Open source software

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Reactive Knowledge Management

Reactive Knowledge Management

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International Conference on Data Engineering

作者： Stefano Ceri Anna Bernasconi Alessia Gagliardi Politecnico di Milano Milano Italy

ISBN: (数字)9798350317152

ISBN: (纸本)9798350317169

Today's large knowledge graphs are conceived mainly for supporting search and e-commerce within large companies such as Google or Amazon, with well-crafted knowledge creation rules. Our recent experience of the COVID-19 pandemic, when knowledge has grown at unprecedented rates and has been often contradictory, inspired us to capture a huge gap in existing concepts and technology: today's knowledge management does not adequately support such a disruptive process. In this article, we propose the design and prototyping of the next generation of knowledge management concepts and systems, which will support domain diversity and scientific evolution as foundational ingredients. change management is based on a reactive approach, well-established in database systems, but so far lacking in knowledge systems. We propose the reactive interaction of several knowledge hubs, each developed within a scientific domain and “owner” of a portion of a common knowledge representation. Knowledge is represented as graphs, with nodes and edges; edges may inter-connect nodes from different hubs. Most importantly, reactive rules cross the hub's borders and create the premises for a disciplined knowledge evolution, even under the pressure of crises. Similar challenges are not restricted to the recent pandemic and can address other crisis scenarios, including the catastrophic consequences of climate change or the recent (r)-evolution in artificial intelligence, studied by several scientific communities, whose management requires complex and controversial choices.

关键词： Knowledge management Knowledge graphs Knowledge based systems Database systems change detection algorithms Artificial intelligence Climate change Electronic commerce

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Content-based video abstraction

Content-based video abstraction

引用

IEEE International Conference on Image Processing

作者： B. Gunsel A.M. Tekalp Department of Electrical Engineering and Center for Electronic Imaging Systems University of Rochester Rochester NY USA

The paper addresses automatic scene change detection, key frame selection, and similarity ranking which constitute the main steps of a content based video abstraction system. Unlike other methods, the proposed algorithm performs scene change detection and key frame selection in one step. We treat scene change detection as a two-class classification problem and employ automatic threshold selection techniques originally developed for image binarization. A quantitative measure for retrieval of similar scenes according to their color content is also defined. The described scheme can be applied to both uncompressed and MPEG compressed video, and can be implemented in real time. Performance of the algorithm has been analyzed on real TV sequences, and comparison with some previously introduced techniques are provided.

关键词： Layout change detection algorithms Content based retrieval Transform coding Image coding Video compression Image sequence analysis Performance analysis Algorithm design and analysis TV

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A Hybrid BIST Scheme for Multiple Heterogeneous Embedded Memories

A Hybrid BIST Scheme for Multiple Heterogeneous Embedded Mem...

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The 16th Asian Test Symposium(第十六届亚洲测试学术会议)

作者： Li-Ming Denq Cheng-Wen Wu Department of Electrical Engineering National Tsing Hua University Hsinchu Taiwan 30013

It is common that an SOC contains hundreds or even thousands of heterogeneous embedded memories. Many of these embedded memories have wide data words, leading to high routing penalty from the BIST circuits. Previous BIST schemes solve the problem using serial interface, e. g., based on the IEEE 1500 architecture and novel scan approaches, to reduce the routing area overhead. However, serial approaches do not allow at- speed test and diagnosis, and are very slow. In this paper, we propose a hybrid BIST architecture that reduces the routing penalty, while allowing at-speed test and diagnosis of the memory cores. The test time is close to that of a typical parallel BIST method. Experimental results show that the proposed BIST can effectively reduce the area overhead.

关键词： Built-in self-test Routing Circuit testing Communication system control Random access memory Automatic testing Logic testing Centralized control Fault diagnosis change detection algorithms

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detection of agricultural chemicals using a lipid membrane sensor

Detection of agricultural chemicals using a lipid membrane s...

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IEEE SENSORS

作者： Y. Naito H. Ikezaki A. Taniguchi K. Toko Anritsu Corporation Atsugi-shi Kanagawa-Pref. JAPAN Kyushu University Fukuoka-shi Fukuoka-Pref. JAPAN

Describes a measurement method to detect ppm level of noncharged agricultural chemicals using a lipid/polymer membrane sensor within five minutes. In the case of this new measurement method, non-charged toxic substances are detected indirectly. Sensor output is change of membrane potential caused by interaction among lipid membrane, agricultural chemicals and lipid in a solution. This, method has a possibility of detection of a trace amount of agricultural chemicals. It is useful for the evaluation of safety of vegetables and fruits.

关键词： Chemical sensors Lipidomics Biomembranes Electrodes Performance evaluation Measurement standards change detection algorithms

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A Novel Normalized Cross-Correlation Based Echo-Path change Detector

A Novel Normalized Cross-Correlation Based Echo-Path Change ...

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IEEE Region 5 Annual Technical Conference

作者： Mohammad Asif Iqbal Steven L. Grant University of Missouri Rolla Rolla MO USA

A double-talk detector is used to freeze acoustic echo canceller's (AEC) filter adaptation during periods of near-end speech. Increased sensitivity towards double-talk results in declaring echo-path changes as double-talk which adversely effects the performance of an AEC as we freeze adaptation when we really need to adapt. Thus, we need an efficient and simple echo-path change detector so as to differentiate any echo-path variations from double-talk condition. In this paper, we derive a novel test statistic for echo-path change detection. The proposed decision statistic detects any echo-path variations, is normalized properly and is computationally very efficient as compared to existing techniques. Simulations demonstrate the efficiency of the proposed algorithm.

关键词： Detectors Speech Acoustic signal detection Adaptive filters Microphones Statistics change detection algorithms Echo cancellers Signal synthesis Testing

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Research on Network Traffic Anomaly detection Algorithm

Research on Network Traffic Anomaly Detection Algorithm

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IEEE Symposium on Computers and Communications (ISCC)

作者： Jun Lv Tong Li Xing Li Academy of Armored Forces Engineering Beijing China China Education and Research Network Tsinghua University Beijing China

Network traffic anomaly detection is a difficult problem in network management. This paper proposed the wavelet generalized likelihood ratio WGLR) algorithm and the error performance detection (EPD) algorithm to solve this problem. The WGLR algorithm combines the generalized likelihood ratio (CLR) algorithm and the Wavelet transform method, and has an advantage of less computation cost. The EPD algorithm, which is based on the prediction error of the traffic model, will detect the anomalous change in the signal without test window delay. Simulating and network traffic experimental results show that the new algorithm has the better performance in network traffic anomaly detection.

关键词： Telecommunication traffic detection algorithms change detection algorithms Traffic control Computer network management Wavelet transforms Computational efficiency Predictive models Testing Delay

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Dynamic model selection with its applications to computer security

Dynamic model selection with its applications to computer se...

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IEEE (first ITW conference of the year) Information Theory Workshop (ITW)

作者： Y. Maruyama K. Yamanishi NEC Corporation Limited Kawasaki Kanagawa Japan

In recent years there has been increased interest in detecting anomalies in network traffic data/audit logs for computer security. With the appearance of a masquerader, for example, any new anomalous behavior pattern may be observed in command line data, and it is an important issue to detect the emergence of such a pattern as early as possible. This paper addresses this issue of anomaly detection by dynamically selecting statistical models from data. Our goal is here not to select a single model over the data as in conventional statistical model selection, but to select a time series of optimal models efficiently, assuming that the true model may change over time. We call this approach dynamic model selection. We first propose a coding-theoretic criterion for dynamic model selection. Next, we propose two dynamic model selection algorithms attaining the minimum of the criteria and analyze their performance. Finally we demonstrate the validity of our algorithms through real application to masquerade detection using UNIX command sequences.

关键词： Application software Computer security Intrusion detection National electric code Telecommunication traffic change detection algorithms Electronic mail Traffic control Performance analysis Algorithm design and analysis

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D1HT: a distributed one hop hash table 06

D1HT: a distributed one hop hash table

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International Symposium on Parallel and Distributed Processing (IPDPS)

作者： L.R. Monnerat C.L. Amorim Comput. & Syst. Eng. Fed. Univ. of Rio de Janeiro Brazil COPPE-Computer and Systems Engineering Federal University of Rio de Janeiro Brazil

ISBN: (纸本)9781424400546

Distributed hash tables (DHTs) have been used in a variety of applications, but most DHTs so far have opted to solve lookups with multiple hops, which sacrifices performance in order to keep little routing information and minimize maintenance traffic. In this paper, we introduce D1HT, a novel single hop DHT that is able to maximize performance with reasonable maintenance traffic overhead even for huge and dynamic peer-to-peer (P2P) systems. We formally define the algorithm we propose to detect and notify any membership change in the system, prove its correctness and performance properties, and present a quarantine-like mechanism to reduce the overhead caused by volatile peers. Our analyses show that D1HT has reasonable maintenance bandwidth requirements even for very large systems, while presenting at least twice less bandwidth overhead than previous single hop DHT

关键词： Routing Bandwidth Peer to peer computing Telecommunication traffic Application software Delay Distributed computing Systems engineering and theory change detection algorithms Mechanical factors

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