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检索条件"主题词=Expectation-Maximisation algorithm"
493 条 记 录,以下是271-280 订阅
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A case study of a "Dragon-King": The 1999 Venezuelan catastrophe
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EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS 2012年 第1期205卷 131-146页
作者: Sueveges, M. Davison, A. C. Univ Geneva ISDC Data Ctr Astrophys CH-1290 Versoix Switzerland Ecole Polytech Fed Lausanne EPFL FSB MATHAA STAT CH-1015 Lausanne Switzerland
We describe a failure of standard extremal models to account for a catastrophic rainfall event in the coastal regions of Venezuela on 14-16 December 1999, due both to inaccurate tail modelling and to an inadequate tre... 详细信息
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Broadband Field Directionality Mapping with Spatially-Aliased Arrays
Broadband Field Directionality Mapping with Spatially-Aliase...
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IEEE 7th Sensor Array and Multichannel Signal Processing Workshop (SAM)
作者: Odom, Jonathan L. Krolik, Jeffrey L. Duke Univ Dept Elect & Comp Engn Durham NC 27708 USA
This paper addresses the problem of broadband spatial spectrum estimation using multiple spatially-aliased arrays. Unlike previous approaches using sparse arrays, the signals here are assumed to be uncorrelated betwee... 详细信息
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Impact of tracer distribution, count level, iterations and post-smoothing on PET quantification using a variously weighted least squares algorithm
Impact of tracer distribution, count level, iterations and p...
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IEEE Nuclear Science Symposium / Medical Imaging Conference Record (NSS/MIC) / 19th Room-Temperature Semiconductor X-ray and Gamma-ray Detector Workshop
作者: Letourneau, Etienne Verhaeghe, Jeroen Reader, Andrew J.
This work is a task-oriented quantitative analysis to assess the best range of reconstruction algorithms parameters which are most suited for quantitative PET imaging of the brain. Starting from a general iterative we... 详细信息
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Impact of Truncation to the Reconstruction with a Small Number of Projections
Impact of Truncation to the Reconstruction with a Small Numb...
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IEEE Nuclear Science Symposium / Medical Imaging Conference Record (NSS/MIC) / 19th Room-Temperature Semiconductor X-ray and Gamma-ray Detector Workshop
作者: Mao, Yanfei Zeng, Gengsheng L. Univ Utah Utah Ctr Adv Imaging Res UCAIR Salt Lake City UT 84112 USA Univ Utah Utah Ctr Adv Imaging Res UCAIR Dept Radiol Salt Lake City UT 84108 USA
Dedicated cardiac SPECT systems have the advantage of high speed and sensitivity at no loss or even a gain in resolution. T he purpose of this paper is to investigate segmented parallel-hole collimation, develop a tai... 详细信息
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Reconstruction of Dose Distribution in In-beam PET for Carbon Therapy
Reconstruction of Dose Distribution in In-beam PET for Carbo...
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IEEE Nuclear Science Symposium / Medical Imaging Conference Record (NSS/MIC) / 19th Room-Temperature Semiconductor X-ray and Gamma-ray Detector Workshop
作者: Kim, Kwangdon Bae, Seungbin Lee, Kisung Chung, Yonghyun An, Sujung Joung, Jinhun Korea Univ Dept Radiol Sci Seoul 136793 South Korea Yonsei Univ Dept Radiol Sci Wonju 220-710 South Korea Nucare Med Syst Inc Seoul 136693 South Korea
There are two main artifacts in reconstructed images from in-beam positron emission tomography(PET). Unlike generic PET, in-beam PET uses the annihilation photons which occur during heavy ion therapy. Therefore, the g... 详细信息
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Data-Driven Quality Monitoring and Fault Detection for Multimode Nonlinear Processes
Data-Driven Quality Monitoring and Fault Detection for Multi...
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51st IEEE Annual Conference on Decision and Control (CDC)
作者: Haghani, Adel Ding, Steven X. Esch, Jonas Hao, Haiyang Univ Duisburg Essen Inst Automat Control & Complex Syst AKS D-47057 Duisburg Germany
This paper addresses the problem of quality monitoring and fault detection in nonlinear processes which are working in different operating points. For such processes the statistical model which is obtained from proces... 详细信息
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Estimating the number of Active Flows from Sampled Packets
Estimating the number of Active Flows from Sampled Packets
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13th IEEE/IFIP Network Operations and Management Symposium
作者: Cheng, Guang Southeast Univ Sch Comp Sci & Engn Nanjing 210096 Peoples R China
A flow is active during a measurement period if it sends at least one packet. It is essential to control resource consumption in network monitoring by traffic sampling, so most high-end routers provide sampling networ... 详细信息
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Median Solution and Noise Sorting, a Reconstruction algorithm for Emission Tomography with Large Hole Collimator
Median Solution and Noise Sorting, a Reconstruction Algorith...
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IEEE Nuclear Science Symposium / Medical Imaging Conference Record (NSS/MIC) / 19th Room-Temperature Semiconductor X-ray and Gamma-ray Detector Workshop
作者: Jeanguillaume, Christian Bouali, Ines Maros, Istvan Faurie, Julia Univ Angers LISA Rue Notre Dame Lac F-49000 Angers France Univ Pannonia H-8200 Veszprem Hungary
SPECT (Single Photon Emission Computerized Tomography) presents poor performances in term of sensitivity and spatial resolution. The bottleneck of the process is due to the use of thin hole collimators. Collimators wi... 详细信息
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Compressed sensing with sparse, structured matrices
Compressed sensing with sparse, structured matrices
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50th Annual Allerton Conference on Communication, Control, and Computing (Allerton)
作者: Angelini, Maria Chiara Ricci-Tersenghi, Federico Kabashima, Yoshiyuki Univ Roma La Sapienza Dip Fis Ple Aldo Moro 5 I-00185 Rome Italy Tokyo Inst Technol Dept Comp Intelligence & Syst Sci Yokohama Kanagawa Japan
In the context of the compressed sensing problem, we propose a new ensemble of sparse random matrices which allow one (i) to acquire and compress a rho(0)-sparse signal of length N in a time linear in N and (ii) to pe... 详细信息
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Implementation of LS, MMSE and SAGE Channel Estimators for Mobile MIMO-OFDM
Implementation of LS, MMSE and SAGE Channel Estimators for M...
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46th Asilomar Conference on Signals, Systems and Computers
作者: Ketonen, Johanna Juntti, Markku Ylioinas, Jari Cavallaro, Joseph R. Univ Oulu Ctr Wireless Commun SF-90100 Oulu Finland Nokia Siemens Networks Oulu Finland Rice Univ Houston TX 77251 USA
The use of decision directed (DD) channel estimation in a multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) downlink receiver is studied in this paper. The 3GPP long term evolutio... 详细信息
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