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International Conference on Hybrid Intelligent Systems (HIS)

作者： Tribeni Prasad Banerjee Swagatam Das Ajith Abraham Department of Electronics and Telecommunication Engineering Jadavpur University Kolkata India IT For Innovations EU Center of excellence Faculty of Electrical Engineering and Computer Science VSB-Technical University of Ostrava Czech Republic

The objective of condition based maintenance (CBM) is typically to determine an optimal maintenance policy to minimize the overall maintenance cost based on condition monitoring information. In Aircraft operator and the maintenance people starving to reduce the cost of aircraft maintenance. So the condition based monitoring for electromechanical control valve is very popular recently. This paper has been proposed an optimized Fractional order Proportional-integral-derivative (FOPID) controller for electromechanical actuated worm gear operated fuel shut off valve.

关键词： Friction Gears Maintenance engineering Control systems Valves Artificial intelligence Optimization

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Stabilization of hydroxyl-terminated silanes in porous silicon for in-situ DNA synthesis

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Physica Status Solidi (C) Current Topics in Solid State Physics 2011年第6期8卷 1851-1855页

作者： Lawrie, Jenifer L. Weiss, Sharon M. Interdisciplinary Graduate Program in Materials Science Vanderbilt University Nashville TN United States Department of Electrical Engineering and Computer Science Vanderbilt University Nashville TN United States

Passivation of porous silicon sensors is a critical issue for achieving high sensitivity and selectivity toward biomolecule targets that may be detected in complex physiologic solution. Without appropriate passivation, degradation of the porous silicon matrix inhibits the repeatability of optical measurements and limits applications in complex media. In this work, we present a method for stabilizing TEOS-HBA monolayers in porous silicon. Annealing of the silane at 200°C for 16 hours, followed by a deionized water wash for a minimum of one hour, results in a porous silicon surface that is highly stable in a number of solvents. Annealing improves cross-linking of surface-attached silane molecules for added stability, and hydrolyzing facilitates removal of weakly bound multilayers. This surface treatment procedure is of considerable interest in applications such as DNA synthesis where hydroxyl functionality is critical and a thick silane surface coating is not desired. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

关键词： Passivation

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Synthesis and Second-Order Nonlinear Optical Properties of New Coumaromethacrylate-Methylmethacrylate Copolymers

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MRS Online Proceedings Library 2011年第1期173卷 601-606页

作者： R. A. Henry J. M. Hoover A. Knoesen S. T. Kowel G. A. Lindsay M. A. Mortazavi Research Department Chemistry Division China Lake USA Department of Electrical Engineering and Computer Science Organized Research Program on Polymeric Ultrathin Film Systems University of California Davis USA

The synthesis and second-order nonlinear optical (NLO) properties of a new family of optically nonlinear coumarin dye-containing polymers is reported. Polymerizable coumaromethacrylate (CMA) monomers having various alkyl spacers (C2 to C5) between the polymerizable group and the chromophore were prepared and copolymerized with methylmethacrylate (MMA) and other vinyl monomers. The CMA copolymers had high chromophoric content (up to 18 × 1020) and glass transitions as high as 132°C. Spin cast films were prepared on BK7 substrates and oriented by corona-onset poling at elevated temperatures (COPET). The poled CMA copolymer films were characterized for spectroscopic absorption and second harmonic properties. A comparison of the nonlinear optical properties of poled CMA-MMA copolymers to poled guest-host systems is made. Relative to guest/host systems, CMA-MMA copolymer films exhibit larger and much more stable second-order nonlinear optical properties.

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Multiuser Hybrid Switched-Selection Diversity Systems

Multiuser Hybrid Switched-Selection Diversity Systems

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IEEE International Symposium on Personal, Indoor and Mobile Radio Communications

作者： Mohammad Shaqfeh Hussein Alnuweiri Mohamed-Slim Alouini Department of Electrical and Computer Engineering Texas A&M University in Qatar Electrical Engineering Program King Abdullah University of Science and Technology (KAUST)

ISBN: (纸本)9781457713460

A new multiuser scheduling scheme is proposed and analyzed in this paper. The proposed system combines features of conventional full-feedback selection-based diversity systems and reduced-feedback switch-based diversity systems. The new hybrid system provides flexibility in trading-off the channel information feedback overhead with the prospected multiuser diversity gains. The users are clustered into groups, and the users' groups are ordered into a sequence. Per-group feedback thresholds are used and optimized to maximize the system overall achievable rate. The proposed hybrid system applies switched diversity criterion to choose one of the groups, and a selection criterion to decide the user to be scheduled from the chosen group. Numerical results demonstrate that the system capacity increases as the number of users per group increases, but at the cost of more required feedback messages.

关键词： Multiuser scheduling Reduced feedback Hybrid switched-selection diversity

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A Model of Mass Customization for engineering Production System Development in Textile and Apparel Industries in Thailand

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Systems engineering Procedia 2011年 2卷 382-397页

作者： Kornthip Watcharapanyawong Sompong Sirisoponsilp Peraphon Sophatsathit Technopreneurship and Innovation Management Program Graduate School Chulalongkorn University Bangkok 10330 Thailand Department of Civil Engineering Faculty of Engineering Chulalongkorn University Bangkok 10330 Thailand Department of Mathematics and Computer Science Faculty of Science Chulalongkorn University Bangkok 10330 Thailand

This paper presents a framework, aiming to develop the mass customization for textile and apparel industries in Thailand. The developed model as presented is the relationship of the connection pertaining to customers’ needs at industrial levels, most of which are Original Design Manufacturer (OEM), a type of textile and apparel business. The outstanding of OEM is the presentation of newly created designs to customers with a variety of products. Importantly, in order to gain such effective production management, an appropriate administrative system with high flexibility, efficient production (Small Lot Size), and punctual delivery is crucially required. In relation to the framework for mass customization development, it concerns three main related involvements: customers, OEM industries, and suppliers, all of which will be assessed so as to be promptly employed in such firms manufacturing products in accordance with the productive systems of mass customization *** conceptual from mass customization systems will facilitate the management in terms of the production designing in factories, aiming at clustering which is complex to the creation of platform from common parts, leading to the development of a variety of goods by the process of product family.

关键词： Mass Customization Clustering Common platform Product family

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Metamorphic solar cells employing chemical mechanical polishing and MOVPE regrowth

Metamorphic solar cells employing chemical mechanical polish...

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37th IEEE Photovoltaic Specialists Conference, PVSC 2011

作者： Mawst, L.J. Dudley, P. Kirch, J. Kim, T. Ruder, S. Kuech, T.F. Tatavarti, R. Department of Electrical and Computer Engineering University of Wisconsin - Madison 1415 Engineering Dr. Madison WI 53706 United States Materials Science Program University of Wisconsin - Madison 1415 Engineering Dr. Madison WI 53706 United States Department of Chemical and Biological Engineering University of Wisconsin - Madison 1415 Engineering Dr. Madison WI 53706 United States MicroLink Devices Inc. Niles IL United States

ISBN: (纸本)9781424499656

We have investigated the MOVPE growth of InxGa1-xAs metamorphic buffer layer (MBL) structures with a focus on techniques to improve the surface morphology and determine the influence of morphology on subsequently grown single-junction device structures. To improve the surface roughness of the underlying MBL, Chemical-Mechanical Polishing (CMP) is employed and MOVPE regrowth of single-junction (SJ) solar cells on top of the polished surface is performed. AFM image analysis indicates the CMP process is effective in reducing the step-graded InxGa1-xAs MBL surface roughness from ∼7-10 nm (as-grown) to 2.3 nm post CMP. A post-CMP ozone/HF treatment was found to be effective in removing silica residue remaining on the surface from the CMP process, allowing for the growth of films on top of the MBL surface subjected to CMP. Improved short circuit current density (Jsc) and external quantum efficiency (QE) were obtained from SJ (1eV) devices which employ the CMP process compared with those on as-grown MBLs. © 2011 IEEE.

关键词： Chemical mechanical polishing

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Detection of hairline mandibular fracture using max-flow min-cut and Kolmogorov-Smirnov distance

Detection of hairline mandibular fracture using max-flow min...

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IEEE International Symposium on Biomedical Imaging

作者： Ananda S. Chowdhury Suchendra M. Bhandarkar Robert W. Robinson Jack C. Yu Tianming Liu Department of Electronics and Telecommunication Engineering Jadavpur University Calcutta India Department of Computer Science University of Georgia Athens GA USA Department of Plastic Surgery Medical College Augusta GA USA

ISBN: (纸本)9781424441273

This paper addresses the clinically challenging problem of hairline mandibular fracture detection from a sequence of Computed Tomography (CT) images. A hairline fracture of critical clinical importance, can be easily missed due to the absence of sharp surface and contour discontinuities and the presence of intensity inhomogeneity in the CT image, if not scrutinized carefully. In this work, the 2D CT image slices displaying a mandible with hairline fractures are first identified within an input CT image sequence of a fractured craniofacial skeleton. This is achieved via an intensity-based image retrieval scheme using Kolmogorov-Smirnov distance as the measure of similarity and an unbroken mandible as the reference image. Since a hairline fracture is essentially a discontinuity in the bone contour, we model it as a minimum cut in an appropriately weighted flow network. The existing graph cut-based segmentation schemes are enhanced with a novel construction of the flow network, guided by the geometry of the human mandible. The Edmonds-Karp refinement of the classical Ford-Fulkerson algorithm is employed next to obtain a minimum cut, which represents the hairline fracture in the already identified CT image slices. Experimental results demonstrate the effectiveness of the proposed method.

关键词： Computed tomography Pixel Image edge detection Bones Mathematical model Image retrieval Geometry

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Responses of human fetal mesenchymal stem cells to various poly(Ε-caprolactone) films: A comparison study

Responses of human fetal mesenchymal stem cells to various p...

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2011 Defense science Research Conference and Expo, DSR 2011

作者： Wang, Zu-Yong Jing, Lim Zhang, Qin-Yuan Teo, Erin Y. Chan, Jerry Hong, Ming-Hui Wen, Feng Teoh, Swee-Hin Department of Mechanical Engineering National University of Singapore Singapore Department of Obstetrics and Gynaecology National University of Singapore Singapore Department of Reproductive Medicine KK Women's and Children's Hospital Singapore Cancer and Stem Cell Biology Program Duke-NUS Graduate Medical School Singapore Department of Electrical and Computer Engineering National University of Singapore Singapore School of Material Science and Engineering Nanyang Technology University Singapore National University of Singapore Singapore

ISBN: (纸本)9781424492763

Poly(Ε-caprolactone) (PCL) films have been applied for vascular tissue engineering. However, few studies studied the effects of fabrication process of PCL film on vascular cell proliferation. In this study, we used different processing methods, incorporating stretching, to fabricate various PCL films. Thickness of films before and after stretch and proliferation ability of human fetal mesenchymal stem cells (hfMSCs) on these films were investigated. Our results showed that stretching significantly reduces the thickness of solvent cast, heat press and cast stretch films (0.22, 0.59, 0.60, p

关键词： Cell proliferation

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Electrical and Optical Characteristics of Isoelectronic Al-doped GaN Films Grown by Metal Organic Chemical Vapor Deposition

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MRS Online Proceedings Library 2011年第1期722卷 351-356页

作者： Lee, Jae-Hoon Kim, Jong-Hyun Ko, Hyun-Min Bae, Sung-Bum Lee, Kyu-Suk Cho, Yong-Hoon Hahm, Sung-Ho Lee, Yong-Hyun Lee, Jung-Hee School of Electronic Engineering & Computer Science Kyungpook National University Daegu Korea Telecommunication Basic Research Laboratory Electronics and Telecommunications Research Institute Taejon Korea Department of Physics Chungbuk National University Cheongju Korea

The effects of the isoelectronic Al-doping of GaN grown by metal organic chemical vapor deposition were investigated for the first time using scanning electron microscopy (SEM), Hall measurements, photoluminescence (PL), and time-resolved PL. When a certain amount of Al was incorporated into the GaN films, the room temperature photoluminescence intensity of the films was approximately two orders larger than that of the undoped GaN. More importantly, the electron mobility significantly increased from 130 for the undoped sample to 500 cm2/Vs for the sample grown at a TMAl flow rate of 10 ?mol/min, while the unintentional background concentration only increased slightly relative to the TMAl flow. The incorporation of Al as an isoelectronic dopant into GaN was easy during MOCVD growth and significantly improved the optical and electrical properties of the film. This was believed to result from a reduction in the dislocation-related non-radiative recombination centers or certain other defects due to the isoelectronic Al-doping.

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An optical-coding method for scattering signal detection in microfluidic cytometers

An optical-coding method for scattering signal detection in ...

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15th International Conference on Miniaturized Systems for Chemistry and Life sciences 2011, MicroTAS 2011

作者： Wu, T.-F. Mei, Z. Pion-Tonachini, L. Zhao, C. Qiao, W. Arianpour, A. Lo, Y.-H. Materials Science and Engineering Program University of California at San Diego San Diego CA 92093-0418 United States Department of Electrical and Computer Engineering University of California at San Diego San Diego CA 92093-0407 United States School of Information and Electronics Beijing Institute of Technology Beijing 100081 China

ISBN: (纸本)9781618395955

In this article, we demonstrated an optical-coding method to detect forward scattering and large angle scattering signals within microfluidic devices. Using silicon photodetectors, we can effectively discriminate the mixture of unlabelled beads and obtain the spatial distribution of beads. The optical coding method improves the signal-to-noise and particle differentiation abilities for lab-on-a-chip flow cytometers. Copyright © (2011) by the Chemical and Biological Microsystems Society.

关键词： Microfluidics

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