A5015183832- Topic Modeling
- Information Retrieval and Search Behavior
- Web Data Mining and Analysis
- Recommender Systems and Techniques
- Natural Language Processing Techniques
- Polymer Nanocomposites and Properties
- Advanced Optical Imaging Technologies
- Expert finding and Q&A systems
- Advanced Image and Video Retrieval Techniques
- Advanced Text Analysis Techniques
- Image Retrieval and Classification Techniques
- Digital Holography and Microscopy
- Hand Gesture Recognition Systems
- Multimodal Machine Learning Applications
- Photorefractive and Nonlinear Optics
- Data Management and Algorithms
- Advanced Vision and Imaging
- Soil Moisture and Remote Sensing
- Mobile Crowdsensing and Crowdsourcing
- Complex Network Analysis Techniques
- Video Analysis and Summarization
- Polymer crystallization and properties
- biodegradable polymer synthesis and properties
- Photonic and Optical Devices
- Data Quality and Management
University of Tsukuba
2019-2025
Kyoto University
2009-2018
Kyoto College of Graduate Studies for Informatics
2014-2017
Toyota Central Research and Development Laboratories (Japan)
1997-2011
The University of Tokyo
2002-2011
Tokyo University of Agriculture and Technology
1996-2010
Tokyo University of Science
1984-2008
Ritsumeikan University
2003-2007
Epson Information Technology College
2007
Seiko Holdings (Japan)
2007
Polypropylene (PP)−clay hybrids (PPCH) have been prepared by simple melt-mixing of three components, i.e., PP, maleic anhydride modified polypropylene oligomers (PP-MA), and clays intercalated with stearylammonium. The dispersibility 10-Å-thick silicate layers the in was investigated using a transmission electron microscope X-ray diffractometer. It is found that there are two important factors to achieve exfoliated homogeneous dispersion hybrids: (1) intercalation capability (2) miscibility...
Polypropylene-clay hybrids (PPCH) were prepared using a maleic anhydride-modified PP oligomer (PP-MA) as compatibilizer. was melt-blended with organophilic clay which intercalated PP-MA. In these PPCHs, the particles of silicate layers dispersed at nanometer level. The became smaller and more uniformly, ratio PP-MA to increased. dynamic storage moduli PPCHs higher than that up 130°C. For example, modulus PPCH 5 wt % 22 1.8 times compared 80°C. As dispersibility clays improved, reinforcement...
The synthesis of polypropylene (PP) oligomer—clay intercalation compounds was studied by using three kinds PP oligomers and organophylic clay. were two types maleic-anhydride-modified containing different amount maleic anhydride groups one type hydroxy modified oligomer. Organophylic clay sodium-ion-exchanged montmorillonite with octadecylammonium ion (C18—Mt). oligomer mixed C18—Mt at 200°C. Maleic-anhydride-modified oligomer, which high acid value type, hydroxy-modified intercalated...
Polypropylene–clay hybrids (PPCHs) were prepared by melt blending maleic anhydride modified PP and organophilic clay. In these PPCHs the silicate layers of clay exfoliated dispersed to monolayers. The hybridization in was achieved with a small amount groups. tensile modulus PPCH 5 wt % 1.9 times higher than that matrix resin at 25°C. dynamic storage moduli (E′) also those PP. E′ 2.5 60°C. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 1918–1922,
A novel and general approach to prepare polyolefin-clay hybrids by using the maleic anhydride modified polyolefins organophilic clay during melt-blending was reported. The silicate layers of were exfoliated homogeneously dispersed at monolayers in hybrids. exhibited remarkable reinforcement compared conventional composites filled with talc which micrometer level.
Abstract Polyethylene‐clay hybrids have been prepared successfully by melt compounding with maleic anhydride grafted polyethylene (MA‐g‐PE), organophilic clay and polyethylene. In these polyethylene‐clay hybrids, the silicate layers of were exfoliated dispersed to monolayers. The exhibit higher tensile yield strengths moduli than those matrices polyethylene‐inorganic composites. When 5‐wt% clays loaded, strength modulus hybrid were, respectively, 1.4 1.8 times polyethylene/MA‐g‐PE mixture....
Here we present multiple-wavelength digital holographic interferometry with a wide measurement range using laser diodes. Small wavelength differences can be easily realized by the tuning of diodes injection current controls. A contour map an object and high sensitivity is demonstrated combining few maps several sensitivities. Synthetic wavelengths are calibrated known height difference. This alleviates need to have precise knowledge recording wavelengths. The synthetic ranged from ~3 mm for...
Evaluation in empirical computer science is essential to show progress and assess technologies developed. Several research domains such as information retrieval have long relied on systematic evaluation measure progress: here, the Cranfield paradigm of creating shared test collections, defining search tasks, collecting ground truth for these tasks has persisted up until now. In recent years, however, several new challenges emerged that do not fit this very well: extremely large data sets,...
Automatic generation of natural language from images has attracted extensive attention. In this paper, we take one step further to investigate poetic (with multiple lines) an image for automatic poetry creation. This task involves challenges, including discovering clues the (e.g., hope green), and generating poems satisfy both relevance poeticness in level. To solve above formulate poem into two correlated sub-tasks by multi-adversarial training via policy gradient, through which cross-modal...
Accurate measurement of large step heights using multiple-wavelength holographic interferometry is realized laser diodes. Due to the high-resolution wavelength tunability such lasers, a pair holograms with difference less than 0.01 nm recorded and used extract phase having synthetic wavelength. Phase differences wavelengths ranging from 2.5 73 mm are extracted by pairs between 0.3 nm. By combining differences, measurements height 18 an rms error 0.04 could be achieved. The requirements for...
A theoretical analysis of the power spectra diffusers with a series pseudorandom phase sequences is presented. General equations describing three typical cases are derived by making use constraints assumed. Profiles showed good agreement results numerical computation using fast-Fourier-transform algorithm. The images through double-diffraction optical system were also evaluated computer simulation. advantage over random discussed from viewpoint signal-to-noise ratio.
In this study, we propose a method to efficiently retrieve BERT pre-trained models that achieve good performance on specific document classification task. natural language processing problems, the common practice involves fine-tuning existing rather than building new ones from ground up due extensive time and computational resources required. The challenge, however, lies in identifying most suitable model large number of available models. To address problem, our proposed utilizes k-nearest...