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International Symposium on Chinese Spoken Language Processing

作者： Junfeng Li Shuichi Sakamoto Satoshi Hongo Masato Akagi Yoiti Suzuki School of Information Science Japan Advanced Institute of Science and Technology Japan Research Institute of Electrical Communication University of Tohoku Japan Department of Design and Computer Application Miyagi Natational College of Technology Japan

ISBN: (纸本)9781424429424

We previously proposed a two-stage binaural speech enhancement with Wiener Filter (TS-BASE/WF) approach for hearing aids in adverse environments [6]. In TS-BASE/WF, the interfering signal is estimated by cancelling the target signal through an adaptive filter in the first stage and a time- variant Wiener filter is applied to enhance the target signal in the second stage. In this paper, we introduce an interference compensation approach, which is applied to the adaptive-filter output, to further improve the estimation accuracy of the interfering signal. The performance of TS-BASE with different speech enhancers is then investigated in different conditions. Experimental results show that the improved TS-BASE algorithms with interference compensation outperform the original TS-BASE algorithms, and that TS-BASE/WF gives the higher speech enhancement performance over the improved TS-BASE algorithms with other speech enhancers.

关键词： Interference Speech enhancement Hearing aids Signal processing algorithms Wiener filter Adaptive filters Acoustic noise Noise reduction Auditory system Working environment noise

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A study on phase noise characteristics of oscillation circuits focused signal output position

IEEJ Transactions on Electronics, Information and Systems

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IEEJ Transactions on Electronics, Information and Systems 2008年第8期128卷 1377-1378页

作者： Imaike, Takeshi Sakuta, Yukinori Sekine, Yoshifumi Program in Electronic Engineering Graduate School of Science and Technology Nihon University 7-24-1 Narashinodai Funabashi Chiba 274-8501 Japan Department of Electronics and Computer Science College of Science and Technology Nihon University 7-24-1 Narashinodai Funabashi Chiba 274-8501 Japan

This paper discusses phase noise characteristics of an Fr oscillator focusing on a signal output position. Oscillation circuits can be divided into an amplifier and a feedback circuit. We compared that phase noise characteristics before passing through a feedback circuit or a after. As a result, it turned out that the slope of the phase noise characteristic does not relate to the signal output position. © 2008 The Institute of Electrical Engineers of Japan.

关键词： Phase noise

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Using a literature-based NMF model for discovering gene functional relationships

Using a literature-based NMF model for discovering gene func...

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IEEE International Conference on Bioinformatics and Biomedicine Workshops (BIBMW)

作者： Elina Tjioe Michael Berry Ramin Homayouni Genome Science and Technology Graduate School University of Tennessee Knoxville TN USA Department of Electrical Engineering and Computer Science University of Tennessee Knoxville TN USA Bioinformatics Program Department of Biology University of Memphis Memphis TN USA

The rapid growth of the biomedical literature and genomic information presents a major challenge for determining the functional relationships among genes. In this study, we develop a Web-based bioinformatics software environment called FAUN or feature annotation using nonnegative matrix factorization (NMF) to facilitate both the discovery and classification of functional relationships among genes. Both the computational complexity and parameterization of NMF for processing gene sets are discussed. We tested FAUN on three manually constructed gene document collections, and then used it to analyze several microarray-derived gene sets obtained from studies of the developing cerebellum in normal and mutant mice. FAUN provides utilities for collaborative knowledge discovery and identification of new gene relationships from text streams and repositories (e.g., MEDLINE). It is particularly useful for the validation and analysis of gene associations suggested by microarray experimentation.

关键词： Bioinformatics Genomics Data mining Matrix decomposition Large scale integration Feature extraction Iterative methods Biological system modeling computer science Computational biology

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System-wide peripheral biomarker discovery using information theory

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13th Pacific Symposium on Biocomputing, PSB 2008

作者： Alterovitz, Gil Xiang, Michael Liu, Jonathan Chang, Amelia Ramoni, Marco F. Division of Health Sciences and Technology Harvard University Massachusetts Institute of Technology Cambridge MA United States Childrens Hospital Informatics Program Boston MA 02115 United States Department of Electrical Engineering and Computer Science Cambridge MA 02139 United States Harvard Partners Center for Genetics and Genomics Harvard Medical School Boston 02115 United States Department of Biology Massachusetts Institute of Technology Cambridge MA 02139 United States

ISBN: (纸本)9812776087

The identification of reliable peripheral biomarkers for clinical diagnosis, patient prognosis, and biological functional studies would allow for access to biological information currently available only through invasive methods. Traditional approaches have so far considered aspects of tissues and biofluid markers independently. Here we introduce an information theoretic framework for biomarker discovery, integrating biofluid and tissue information. This allows us to identify tissue information in peripheral biofluids. We treat tissue-biofluid interactions as an information channel through functional space using 26 proteomes from 45 different sources to determine quantitatively the correspondence of each biofluid for specific tissues via relative entropy calculation of proteomes mapped onto phenotype, function, and drug space. Next, we identify candidate biofluids and biomarkers responsible for functional information transfer (p

关键词： Tissue

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Dynamic sleep scheduling mechanism for localization in mobile sensor networks

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Jisuanji Yanjiu yu Fazhan/computer Research and Development 2008年第8期45卷 1330-1337页

作者： Liu, Yuheng Wu, Jing Chen, Zhenyong Xiong, Zhang Department of Computer Application Engineering School of Computer Science and Engineering Beihang University Beijing 100083 China Department of Industry and Market Research Research Institute of China Mobile Beijing 100053 China

Due to the limited power supply, sensors have to switch between sleeping mode and awake mode at a low duty cycle to extend the network life-time. Therefore, when localizing a mobile node, it is possible that a seed node is passed by the mobile node during its sleeping mode, so that the mobile node cannot collect enough seed information and fails to be localized consequently. In this paper, a dynamic sleep scheduling mechanism, namely P-SWIM is proposed. In P-SWIM, each seed is proactively notified if a mobile node is moving toward it, so that only these seeds should remain active in full duty when the mobile node passes by them, while the other seeds can still stay in the low duty cycle mode. P-SWIM can ensure enough seed connectivity around the mobile node, which is necessary for successful mobile localization. Simulation results indicate that localization algorithms based on P-SWIM can achieve better localization performance than those based on the other two sleep scheduling mechanisms, RIS and GAF. Moreover, P-SWIM causes least running overhead to the network overall power consumption among the three mechanisms, at most 47.6% and 60.2% less than RIS and GAF.

关键词： Sensor networks

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An information theoretic framework for genomic data analysis

An information theoretic framework for genomic data analysis

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IEEE Symposium on Bioinformatics and Bioengineering (BIBE)

作者： Aaron McKenna Gil Alterovitz Bioinformatics Program Boston University Boston MA USA Harvard Partners Center for Genetics and Genomics Harvard Medical School Boston MA Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA Children's Hospital Informatics Program Boston MA

The breadth of biological data collected in the last decade has far outstripped the methods available to process it. To effectively investigate and explore this abundance of data, novel automated collection and analysis approaches must be devised. We have developed a new open software framework, the Open Genomic Analysis Platform (OGAP), to aid in the analysis of genomic data. It is capable of analyzing a variety of data source, and focuses on using information theory to characterize data. The frameworks has is capable of import a variety of genome tied data, and provides custom analysis and visualization of results. We then demonstrate the use of this framework analyzing the Prochlorococcus Marinus organism. We show a strong correlation between the information content of sequence data and up regulation of gene expression during lytic infection.

关键词： Genomics Bioinformatics Data analysis Biological information theory Open source software Information analysis Information theory Data visualization Organisms Gene expression

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Automatic image registration method based on SIFT and Harris-Affine features matching

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Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of science and technology (Natural science Edition) 2008年第8期36卷 13-16页

作者： Li, Lingling Li, Cuihua Zeng, Xiaoming Li, Bao School of Mathematical Science Xiamen University Xiamen 361005 China School of Information Science and Technology Xiamen University Xiamen 361005 China Department of Computer Science and Application Zhengzhou Institute of Aeronautical Industry Management Zhengzhou 450015 China No.96550 PLA Unit Luoyang 471031 China

An automatic image registration algorithm based on the complementary SIFT and Harris-Affine (H-A) local invariant features was proposed for large misalignment multi-sensor images. In this algorithm, SIFT features were complemented with H-A features and the ratio of the first and second nearest neighbor distance were used to setup the initial correspondences. The affine invariant of Mahalannobis distance was used to remove the mismatched feature points. With this correspondence of the points, the affine matrix between two different images could be determined. All points in the sensed image were mapped to the reference using the estimated transformation matrix and the corresponding gray level was assigned by re-sampling the image in the sensed image. Experiments demonstrated the feasibility of this method.

关键词： Image registration

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Nanotech innovations: Nanotechnology enterprise at Michigan technological university

Nanotech innovations: Nanotechnology enterprise at Michigan ...

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2008 AIChE Annual Meeting, AIChE 100

作者： Jaszczak, John A. Raber, Mary Bennett, Michael Alaraje, Nasser Bergstrom, Paul L. Department of Physics Michigan Technological University 1400 Townsend Dr. Houghton MI 49931 United States Enterprise Program Michigan Technological University 1400 Townsend Dr. Houghton MI 49931 United States Department of Social Sciences Michigan Technological University 1400 Townsend Dr. Houghton MI 49931 United States School of Technology Michigan Technological University 1400 Townsend Dr. Houghton MI 49931 United States Department of Electrical and Computer Engineering Michigan Technological University 1400 Townsend Dr. Houghton MI 49931 United States Science Technology and Society Vassar College Poughkeepsie NY 12604-0246 United States

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Overcoming Bandwidth and Satellite Communications Limitations to Accelerate applications of Remote Sensing and High Performance Computing for Sustainable African Development: Contributions from Egypt, Nigeria and South Africa

Overcoming Bandwidth and Satellite Communications Limitation...

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IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： Gilbert L. Rochon Magdy Wahab Gamal El Afandi Ado Dan-Isa Happy Sithole Khomotso Kganyago Souleymane Fall Joseph Quansah Akilah Martin Bereket Araya Chetan Maringanti Cliff Robinson Kaiem L. Frink Jean Pierre Antelo Rosen Center for Advanced Computing Purdue Terrestrial Observatory Purdue University-Information Technology IN USA Department of Astronomy & Meteorology Faculty of Science Cairo University Cairo Egypt Department of Meteorology & Astronomy Al-Azhar University Cairo Egypt Department of Computer Engineering Bayero University Kano Nigeria Center for High Performance Computing CHCP-CSIRO Cape Town South Africa Department of Agricultural & Biological Engineering Purdue University West Lafayette IN USA School for New Learning De Paul University Chicago IL USA Purdue Research Opportunities Program West Lafayette IN USA

Sixty-two years after the first photos of earth taken by a camera aboard a V-2 rocket in October, 1946, and forty-eight years since the first CORONA satellite images were captured, the status of remote sensing research and applications within the African continent has made dramatic progress. Many African countries now have remote sensing research centers, within government agencies, research institutes and universities. Some countries in Africa currently have earth observing and/or telecommunications satellites in orbit and/or have such assets in various planning stages. The authors document such progress, in addition to the constraints to further applications of remote sensing for sustainable development in Africa, with special reference to data distribution constraints. Moreover, the authors address the urgency for bandwidth improvements within the African continent, so as to enable sustainable development initiatives to benefit from advances in high performance computing, required for ab initio near-real-time analysis of satellite-data. Such capabilities, it is argued, are propaedeutic for time-critical initiatives, such as vulnerability assessment, disaster preparedness and mitigation, emergency response, humanitarian assistance and post-calamity reconstruction, associated with a wide array of biogenic and anthropogenic disasters. Case studies of advances in infrastructure for satellite remote sensing and high performance computing, with implications for sustainable development in Africa, are provided from Egypt, Nigeria and South Africa.

关键词： Bandwidth Satellite communication Acceleration Remote sensing High performance computing Africa Sustainable development Earth Continents Cameras

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An energy-aware protocol for data gathering applications in wireless sensor networks

An energy-aware protocol for data gathering applications in ...

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IEEE International Conference on Communications (ICC 2007)

作者： Liu, Ming Zheng, Yuan Cao, Jiannong Chen, Guihai Chen, Lijun Gong, Haigang School of Computer Science and Engineering University of Electronic and Technology of China China Internet and Mobile Computing Lab. Department of Computing Hong Kong Polytechnic University Hong Kong State Key Laboratory for Novel Software Technology Nanjing University China

ISBN: (纸本)9781424403523

Data gathering is a major function of many applications in wireless sensor networks (WSNs). The most important issue in designing a data gathering algorithm is how to save energy of sensor nodes while meeting the requirement of applications/users such as sensing area coverage. In this paper, we propose a novel hierarchical clustering protocol for long-lived sensor network. EAP achieves a good performance in terms of lifetime by minimizing energy consumption for in-network communications and balancing the energy load among all nodes. EAP introduces a new clustering parameter for cluster head election, which can better handle the heterogeneous energy capacities. Furthermore, it also introduces a simple but efficient approach, namely intra-cluster coverage to cope with the area coverage problem. We evaluate the performance of the proposed protocol using a simple temperature sensing application. Simulation results show that our protocol significantly outperforms LEACH and HEED in terms of network lifetime and the amount of data gathered.

关键词： Network protocols

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