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Your search keyword '"Yu, Z. Z."' showing total 114 results
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114 results on '"Yu, Z. Z."'

5. Contributor contact details

Author

Tjong, S.C., primary, Mai, Yiu-Wing, additional, Cheng, Xinjian, additional, Tjong, S.C., additional, Li, Robert K.Y., additional, Psarras, G.C., additional, Smith, R.C., additional, Nelson, J.K., additional, Schadler, L.S., additional, Li, Ai-Dong, additional, Liu, Wen-Chao, additional, Fu, Shao-Yun, additional, Lee, Kwang-Pill, additional, Gopalan, A., additional, Komathi, S., additional, Raghupathy, D., additional, Pissis, P., additional, Kripotou, S., additional, Kyritsis, A., additional, Bao, S.P., additional, Tang, C.Y., additional, Geng, Y., additional, Li, J., additional, Kim, J.K., additional, Dasari, A., additional, Cai, G.-P., additional, Yu, Z.-Z., additional, Chen, Pei, additional, Wong, Shing-Chung, additional, Lu, Chunsheng, additional, Yang, Mingshu, additional, Zhang, Shimin, additional, Qin, Huanli, additional, Liu, T.X., additional, Huang, S., additional, Thomassin, Jean-Michel, additional, Jérôme, Robert, additional, Detrembleur, Christophe, additional, Molenberg, Isabel, additional, Huynen, Isabelle, additional, Ma, Chen-Chi M., additional, Hsiao, Min-Chien, additional, Liao, Shu-Hang, additional, Yen, Ming-Yu, additional, Teng, Chih-Chun, additional, Hsiao, Min-Hsuan, additional, Teo, W.E., additional, Kaur, S., additional, Seeram, Ramakrishna, additional, Lu, Yang, additional, Yu, Shu-Hong, additional, Zeng, Wei, additional, Guo Chen, Shi, additional, Zhao, Bin, additional, Rong, Min Zhi, additional, Zhang, Ming Qiu, additional, Gao, Wei, additional, Li, Zhengwei, additional, Marouf, B.T., additional, Bagheri, R., additional, Pearson, R.A., additional, Liang, Y.L., additional, Lu, Yong-Lai, additional, Zhang, Li-Qun, additional, Xie, Xiao-Lin, additional, Du, Fei-Peng, additional, Li, Yu Chao, additional, and Tjong, Sie Chin, additional

Published
2010
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14. Electromagnetic inductance tomography (EMT): sensor, electronics and image reconstruction for a system with a rotatable parallel excitation

Author

Yu, Z. Z., Peyton, A. J., Xu, L. A., and Beck, M. S.

Subjects
ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION
Abstract

The main features and principle of operation of an electromagnetic inductance tomography system are described. The system can image the distribution of electrically conducting and/or magnetically permeable materials and is analogous to the other electrical tomography systems which measure capacitance or resistance. The paper presents a nonintrusive system with a rotatable parallel uniform excitation magnetic field which improves the detectability at the centre of the object space with respect to that near the periphery. The sensor construction, electronics design and image reconstruction are described. A novel electronic compensation scheme is used to condition the output signals from the sensor. This scheme subtracts the empty space background field measurements and consequently increases the overall dynamic range of the data acquisition system. An image reconstruction technique based on a correlation method is described and some images are presented.

Published
1998

15. Polymer nanocomposites.

Author

Mai Y.W. (ed.), Yu Z. Z. (ed.), Mai Y.W. (ed.), and Yu Z. Z. (ed.)

Abstract

Polymer nanocomposites are a class of reinforced polymers with low quantities of nanometric-sized clay particles which give them improved barrier properties, fire resistance and strength. Such properties have made them valuable in components such as panels and as barrier and coating materials in automobile, civil and electrical engineering as well as packaging. The book provides a comprehensive review of the main types of polymer nanocomposite and their properties., Polymer nanocomposites are a class of reinforced polymers with low quantities of nanometric-sized clay particles which give them improved barrier properties, fire resistance and strength. Such properties have made them valuable in components such as panels and as barrier and coating materials in automobile, civil and electrical engineering as well as packaging. The book provides a comprehensive review of the main types of polymer nanocomposite and their properties.

Published
2006

26. Development of sensor arrays for electromagnetic tomography: compensation of large background signal values.

Author

Yu, Z. Z., Peyton, A. J., Yu, Z. Z., and Peyton, A. J.

Abstract

A new electromagnetic inductance tomography (EMT) system has been developed with 16 excitation coils, 16 detection coils and a circular cross-section region of interest. This paper highlights one aspect of the sensor design, the compensation of the largest empty space signal. The system is capable of resolving a conductive or ferromagnetic object positioned in the centre with a diameter which is approximately 5% of that of the region of interest. This resolution is comparable to other electrical tomographic techniques. A description of the sensor array and a selection of sensitivity maps are also presented.

Published
1998

29. An overview of electromagnetic inductance tomography: description of three different systems.

Author

Peyton, A. J., Yu, Z. Z., Lyon, G., Peyton, A. J., Yu, Z. Z., and Lyon, G.

Abstract

This paper presents a general overview of electromagnetic inductance tomography (EMT). A general introduction is given together with a description of the theoretical background of the technique. Three examples of different EMT systems are discussed and images produced using several different image reconstruction techniques are presented. A discussion of the main features of the techniques is included and some potential applications are suggested.

Published
1996

30. Developments in electromagnetic tomography instrumentation.

Author

Lyon, G., Peyton, A. J., Yu, Z. Z., Beck, M. S., Lyon, G., Peyton, A. J., Yu, Z. Z., and Beck, M. S.

Abstract

A new EMT sensor and instrumentation is described which combines the best features of previous systems and has a modular structure to allow for future system expansion and development.

Published
1996

37. A global surface reflectivity data set for the 2.2-2.35 µm region.

Author

Yu, Z. Z. and Drummond, J. R.

Subjects
*REFLECTANCE, *SURFACE of the earth, *NEAR infrared reflectance spectroscopy, *AIR pollution potential, *VEGETATION dynamics, *VEGETATION & climate, *REMOTE sensing
Abstract

The lack of surface reflectivity data in the near-infrared region and the need of this information for an on-going project on remote sounding of atmospheric pollution motivated a search for a scientific, yet practical approach to creating a global data set of surface reflectivity with seasonality at 2.2–2.35 μm region. Since the surface reflectivity varies significantly with the type of unvegetated ground and the extent of surface vegetation coverage, attempts were first made to determine the surface reflectivity of each of the major ‘components’ of the Earth's surface in the spectrum region of interest. The Landsat TM band 7 data were used to derive the reflectivity values for those components. Furthermore, the global Leaf Area Index (LAI) data set from the International Satellite Land Surface Climatology Project (ISLSCP) was used to calculate the seasonal variation of the fraction of vegetation coverage of any given surface areas. A global map of reflectivity in the 2.3 μm region is then derived by taking a weighted average of the reflectivity values of several basic components of the underlying surface. The weight of each characteristic surface component comes from its fractional area. A brief description is presented on how to calculate the fraction of vegetation coverage characterized by the green Leaf Area Fraction (LAF) from widely available Normalized Difference Vegetation Index (NDVI) data sets. Also presented is the comparison of the derived surface reflectivity by this approach with independently calculated reflectivity values from the Landsat data for some selected areas. The overall methodology can be extended to achieve a higher-resolution mapping when the required data sets become available. [ABSTRACT FROM AUTHOR]

Published
1998
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38. Enhanced Interfacial Adhesion between PPO and Glass Beads in Composites by Surface Modification of Glass Beads via In Situ Polymerization and Copolymerization

Author

Xie, X.-L., Tang, C.-Y., Zhou, X.-P., Li, R. K.-Y., Yu, Z.-Z., Zhang, Q.-X., and Mai, Y.-W.

Abstract

Glass beads were modified with vinyl triethoxyl silane (VTES) followed by in situ copolymerization with styrene (St) and by direct modification with St via in situ polymerization. It was seen that the presence of glass beads did not inhibit the polymerization of St, and FT-IR spectra confirmed that the polystyrene (PS) molecules were grafted on the surfaces of glass beads. When the modified glass beads were filled in a poly(phenylene oxide) (PPO) matrix, the PS segments on the surfaces of glass beads clearly improved compatibility and enhanced interfacial adhesion between the PPO matrix and glass beads, which was responsible for the slightly increased glass transition temperature of the PPO component. Surface modifications, especially by in situ copolymerization of VTES and St, increased significantly notch impact strengths and marginal stiffness and tensile strengths of PPO/glass bead composites.

Published
2004

40. In-situ combustion synthesis of ultrafine TiB2 particles reinforced Cu matrix composite.

Author

Zhang, X. H., Van, C., and Yu, Z. Z.

Subjects
TITANIUM, COPPER, METALS, X-ray diffraction, DIFFRACTION patterns, HOLOGRAPHIC interferometry
Abstract

Focuses on the in situ combustion synthesis of ultrafine TiB2 particles reinforced Cu matrix composite. Discussion of the microstructure of Cu matrix; Presentation of the X-ray diffraction patterns of the synthesized Cu-TiB2 composite.

Published
2004
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