Dai Q  Rajasekharan R  Butt H  Qiu X  Amaragtunga G  Wilkinson TD 《Small (Weinheim an der Bergstrasse, Germany)》2012,8(16):2501-2504

An ultrasmall tunable microlens with a diameter of 1.5 μm is fabricated using nematic liquid crystals (electrically tunable medium) and vertically aligned carbon nanofibers (CNFs, electrodes). Individual CNFs are grown at the center of circular dielectric regions. This allows the CNFs to produce a more Gaussian electric field profile and hence more uniformity in lens array switching.  相似文献   

    

Zhulin Huang  Guowen Meng  Qing Huang  Yajun Yang  Chuhong Zhu  Chaolong Tang 《Advanced materials (Deerfield Beach, Fla.)》2010,22(37):4136-4139

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J. Liao  L. Bernard  M. Langer  C. Schönenberger  M. Calame 《Advanced materials (Deerfield Beach, Fla.)》2006,18(18):2444-2447

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A. P. S. Selvadurai  A. Shirazi 《International journal for numerical methods in engineering》2005,63(14):2017-2039

A flat rigid elliptical anchorage located in a damage‐susceptible fluid‐saturated poroelastic medium is subjected to an in‐plane load, which induces a pure translation in the plane of the anchor. This paper develops computational estimates for the time‐dependent displacement of the disc anchor for the classical problem that involves Biot consolidation and compares the results with situations where the porous skeleton can experience micro‐mechanical damage that leads to an alteration in both its elasticity and fluid transport characteristics. Copyright © 2005 John Wiley & Sons, Ltd.  相似文献   

    

Chien Wu  Jen-Bin Shi  Chih-Jung Chen  Jer-Yan Lin 《Materials Letters》2006,60(29-30):3618-3621

Crystalline PbS nanowire arrays have been successfully fabricated by AC applied DC electrochemical deposition from aqueous solutions of dimethylsulfoxide DMSO solution containing lead chloride and elemental sulfur into sulfuric anodic alumina membranes (AAM). These nanowires have uniform diameters of approximately 30 nm, and their lengths are up to tens of micrometers. Scanning electron microscopy indicates that the ordered PbS nanowire arrays are completely embedded. The results of X-ray diffraction show that the as-synthesized nanowires are crystalline with highly preferential orientation. Energy dispersive spectrometer analysis shows that the composition ratio is very close to 1:1. Finally PL and UV–VIS illustrate the quantum confinement effects of PbS nanowire arrays.  相似文献   

    

Emilio Muñoz‐Sandoval Dr.  Vivechana Agarwal Dr.  José Escorcia‐García  Daniel Ramírez‐González  Maria M. Martínez‐Mondragón Dr.  Eduardo Cruz‐Silva  David Meneses‐Rodríguez  Julio A. Rodríguez‐Manzo  Humberto Terrones Prof.  Mauricio Terrones Prof. 《Small (Weinheim an der Bergstrasse, Germany)》2007,3(7):1105-1105

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  总被引：1，自引：0，他引：1  

Zhang X  Li Q  Tu Y  Li Y  Coulter JY  Zheng L  Zhao Y  Jia Q  Peterson DE  Zhu Y 《Small (Weinheim an der Bergstrasse, Germany)》2007,3(2):244-248

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Suck Won Hong  Tony Banks  John A. Rogers 《Advanced materials (Deerfield Beach, Fla.)》2010,22(16):1826-1830

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Chuen‐Ching Wang  Bo‐Yu Chen 《International journal of imaging systems and technology》2008,18(4):257-264

This article proposes a new fragile watermarking scheme named bit‐plane watermarking (BPW) which considers ways to improve coding efficiency whereas providing watermarking capability. Because of the use of the run‐length coding strategy for embedding watermark information, the BPW not only verifies the authenticity and integrity of video streams, but also can recompress the bit streams for improving the compression ratio. To verify the effectiveness of this new concept, we select the MPEG‐4 FGS as the platform for implementation. The watermark is embedded in the bit‐plane blocks of MPEG‐4 FGS enhancement layer bitstream, and the coefficient in each bit‐plane block is automatically selected so that the run‐length symbols can be reduced and the location of embedded bits is not required to memorize. The effectiveness of the proposed scheme is demonstrated in a series of experimental simulations. It is shown that the scheme successfully detects changes made to the content of MPEG‐4 FGS video streams and identifies the specific location at which these changes have been made. Furthermore, the results show that the scheme can further reduce the length of compressed bit stream. © 2008 Wiley Periodicals, Inc. Int J Imaging Syst Technol, 18, 257–264, 2008; Published online in Wiley InterScience (www.interscience.wiley.com).  相似文献   

    

Naoki Nishida  Edakkattuparambil S. Shibu  Hiroshi Yao  Tsugao Oonishi  Keisaku Kimura  Thalappil Pradeep 《Advanced materials (Deerfield Beach, Fla.)》2008,20(24):4719-4723

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