Hiroshi SAWADA


Network Event Extraction from Log Data with Nonnegative Tensor Factorization
Tatsuaki KIMURA Keisuke ISHIBASHI Tatsuya MORI Hiroshi SAWADA Tsuyoshi TOYONO Ken NISHIMATSU Akio WATANABE Akihiro SHIMODA Kohei SHIOMOTO 
Publication:   
Publication Date: 2017/10/01
Vol. E100-B  No. 10  pp. 1865-1878
Type of Manuscript:  PAPER
Category: Network Management/Operation
Keyword: 
network managementsyslognonnegative tensor factorization (NTF)
 Summary | Full Text:PDF(2.6MB)

Analyzing Temporal Dynamics of Consumer's Behavior Based on Hierarchical Time-Rescaling
Hideaki KIM Noriko TAKAYA Hiroshi SAWADA 
Publication:   
Publication Date: 2017/04/01
Vol. E100-D  No. 4  pp. 693-703
Type of Manuscript:  Special Section PAPER (Special Section on Data Engineering and Information Management)
Category: 
Keyword: 
self-exciting processtime-rescaling theoreme-commercepurchase behavior
 Summary | Full Text:PDF(1.8MB)

Efficient K-Nearest Neighbor Graph Construction Using MapReduce for Large-Scale Data Sets
Tomohiro WARASHINA Kazuo AOYAMA Hiroshi SAWADA Takashi HATTORI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2014/12/01
Vol. E97-D  No. 12  pp. 3142-3154
Type of Manuscript:  PAPER
Category: Data Engineering, Web Information Systems
Keyword: 
k-nearest neighbor graphHadoop MapReducedistributed computing
 Summary | Full Text:PDF(1.5MB)

FOREWORD
Hiroshi SAWADA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/10/01
Vol. E96-A  No. 10  pp. 1917-1917
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(191.4KB)

Blind Source Separation of Convolutive Mixtures of Speech in Frequency Domain
Shoji MAKINO Hiroshi SAWADA Ryo MUKAI Shoko ARAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/07/01
Vol. E88-A  No. 7  pp. 1640-1655
Type of Manuscript:  INVITED PAPER (Special Section on Multi-channel Acoustic Signal Processing)
Category: 
Keyword: 
blind source separationconvolutive mixturesindependent component analysisfrequency-domain BSSmicrophone arrayadaptive beamformer
 Summary | Full Text:PDF(1.7MB)

Multistage SIMO-Model-Based Blind Source Separation Combining Frequency-Domain ICA and Time-Domain ICA
Satoshi UKAI Tomoya TAKATANI Hiroshi SARUWATARI Kiyohiro SHIKANO Ryo MUKAI Hiroshi SAWADA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/03/01
Vol. E88-A  No. 3  pp. 642-650
Type of Manuscript:  Special Section PAPER (Special Section on Adaptive Signal Processing and Its Applications)
Category: 
Keyword: 
blind source separationmicrophone arrayindependent component analysisSIMO model
 Summary | Full Text:PDF(583.9KB)

Blind Source Separation for Moving Speech Signals Using Blockwise ICA and Residual Crosstalk Subtraction
Ryo MUKAI Hiroshi SAWADA Shoko ARAKI Shoji MAKINO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/08/01
Vol. E87-A  No. 8  pp. 1941-1948
Type of Manuscript:  Special Section PAPER (Special Section on Digital Signal Processing)
Category: Speech/Acoustic Signal Processing
Keyword: 
blind source separationindependent component analysisconvolutive mixturesrealtimespectral subtractionpost processing
 Summary | Full Text:PDF(1.4MB)

Polar Coordinate Based Nonlinear Function for Frequency-Domain Blind Source Separation
Hiroshi SAWADA Ryo MUKAI Shoko ARAKI Shoji MAKINO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/03/01
Vol. E86-A  No. 3  pp. 590-596
Type of Manuscript:  Special Section PAPER (Special Section on Blind Signal Processing: Independent Component Analysis and Signal Separation)
Category: Convolutive Systems
Keyword: 
independent component analysisfrequency domaincomplex-valued signalpolar coordinateCartesian coordinate
 Summary | Full Text:PDF(655.2KB)

A General Framework to Use Various Decomposition Methods for LUT Network Synthesis
Shigeru YAMASHITA Hiroshi SAWADA Akira NAGOYA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/11/01
Vol. E84-A  No. 11  pp. 2915-2922
Type of Manuscript:  PAPER
Category: VLSI Design Technology and CAD
Keyword: 
functional decompositionalgebraic decompositionfield programmable gate array (FPGA)look-up table (LUT)
 Summary | Full Text:PDF(363.4KB)

Efficient Kernel Generation Based on Implicit Cube Set Representations and Its Applications
Hiroshi SAWADA Shigeru YAMASHITA Akira NAGOYA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/12/25
Vol. E83-A  No. 12  pp. 2513-2519
Type of Manuscript:  Special Section PAPER (Special Section on VLSI Design and CAD Algorithms)
Category: Logic Synthesis
Keyword: 
multi-level logic synthesissum-of-products expressionimplicit cube set representationkernel
 Summary | Full Text:PDF(345.5KB)

Restructuring Logic Representations with Simple Disjunctive Decompositions
Hiroshi SAWADA Shigeru YAMASHITA Akira NAGOYA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/12/25
Vol. E81-A  No. 12  pp. 2538-2544
Type of Manuscript:  Special Section PAPER (Special Section on VLSI Design and CAD Algorithms)
Category: Logic Synthesis
Keyword: 
simple disjunctive decompositionsymmetric variables ordered binary decision diagrammulti-level logic circuit
 Summary | Full Text:PDF(635.6KB)

An Efficient Method for Finding an Optimal Bi-Decomposition
Shigeru YAMASHITA Hiroshi SAWADA Akira NAGOYA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/12/25
Vol. E81-A  No. 12  pp. 2529-2537
Type of Manuscript:  Special Section PAPER (Special Section on VLSI Design and CAD Algorithms)
Category: Logic Synthesis
Keyword: 
functional decompositionbi-decompositionANDXORlook-up table
 Summary | Full Text:PDF(755.8KB)

Logic Synthesis for Look-Up Table Based FPGAs Using Functional Decomposition and Boolean Resubstitution
Hiroshi SAWADA Takayuki SUYAMA Akira NAGOYA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 1997/10/25
Vol. E80-D  No. 10  pp. 1017-1023
Type of Manuscript:  Special Section PAPER (Special Issue on Synthesis and Verification of Hardware Design)
Category: Logic Design
Keyword: 
FPGAlook-up table (LUT)functional decompositionBoolean resubstitutionsupport minimization
 Summary | Full Text:PDF(590.8KB)

Microwave CT Imaging for a Human Forearm at 3GHz
Takayuki NAKAJIMA Hiroshi SAWADA Itsuo YAMAURA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1995/06/25
Vol. E78-B  No. 6  pp. 874-876
Type of Manuscript:  Special Section LETTER (Special Issue on Medical Applications of Electromagnetic Techniques)
Category: 
Keyword: 
microwave imagingmicrowave transmission CTbiological imagingspatial resolutioncorrection of diffraction effectssmall-sized horn antenna
 Summary | Full Text:PDF(358.7KB)

On the Computational Power of Binary Decision Diagrams
Hiroshi SAWADA Yasuhiko TAKENAGA Shuzo YAJIMA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 1994/06/25
Vol. E77-D  No. 6  pp. 611-618
Type of Manuscript:  PAPER
Category: Automata, Languages and Theory of Computing
Keyword: 
binary decision diagramon-line Turing machineplaner circuitpermutationcomplete language
 Summary | Full Text:PDF(640.9KB)