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Flexible Architectures for Morphological Image Processing and Analysis

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY 1992年第1期2卷 72-83页

作者： Loui, Alexander C. P. Venetsanopoulos, A. N. Smith, K. C. Univ Toronto Dept Elect Engn Toronto ON M5S 1A4 Canada

This paper presents an architecture for the efficient and high-speed realization of morphological filters. Since morphological filtering can be described In terms of erosion and dilation, two bask building units performing these functions are required for the realization of any morphological filter. Dual architectures for erosion and dilation are proposed and their operations are described. Their structure, similar to the systolic array architecture as used In the implementation of linear digital filters, Is highly modular and suitable for efficient very-large-scale integration (VLSI) Implementation. A decomposition scheme Is proposed to facilitate the Implementation of two-dimensional morphological filters based on one-dimensional structuring elements constructed using the dual architectures. The proposed architectures, which also allow the processing of gray-scale images, are appropriate for applications where speed, size, and cost are of critical significance.

关键词： Hypertrophy ARCHITECTURE morphological image processing morphological filters Digital filters Soil erosion Dilatation Very large scale integration Image processing grayscale images array structure

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A millimeter-wave pattern-reconfigurable antenna with a reconfigurable feeding network

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JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS 2013年第5期27卷 649-658页

作者： Ding, Xiao Wang, Bingzhong Univ Elect Sci & Technol China Inst Appl Phys Chengdu 610054 Peoples R China

A millimeter-wave pattern-reconfigurable antenna is proposed, which adopts a linear array structure with three radiating elements and has a reconfigurable feeding network. In order to eliminate the influence on the radiation caused by the feeding network and to conveniently reconfigure the feeding network, the feeding layer and radiation layer of the antenna are separated by a ground plane. By electrically controlling the PIN diodes integrated in the feeding network, the proposed antenna can reconfigure its radiation pattern with three reconfigurable modes. Experiment results show that the three reconfigurable patterns point to , 3 degrees, and in the elevation plane, respectively, with a gain fluctuation less than 0.6dB.

关键词： waveforms PIN diodes Ground plane gain ripple Radiation patterns millimeter wave Electricity configurability Feeding Network Radiation array structure

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AN ASYMMETRICAL LIGHTLY DOPED SOURCE CELL FOR VIRTUAL GROUND HIGH-DENSITY EPROMS

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IEEE TRANSACTIONS ON ELECTRON DEVICES 1990年第4期37卷 1046-1051页

作者： YOSHIKAWA, K MORI, S NARITA, K ARAI, N OHSHIMA, Y KANEKO, Y ARAKI, H TOSHIBA MICROELECTR CORP SAIWAI KUKAWASAKI 210JAPAN TOSHIBA MICROCOMP ENGN CORP KAWASAKIJAPAN

An EPROM cell structure with asymmetrically doped source and drain junctions, which is suitable for a virtual ground array architecture, is described. The asymmetric cell can eliminate a write disturb to an adjacent cell, which is inherent in virtual ground designs, in the write mode. In the read mode, the cell provides higher read current and substantial soft-write lifetime, along with optimization of the lightly doped n/sup +/ region concentration. Virtual ground designs using the cell have been implemented. A planarized process to improve manufacturability is discussed. These reliable, scalable cell and array structures are judged promising for the next generation of high-density EPROMs.

关键词： drain junction read current ground Cells Manufacturability Erasable Programmable Read Only Memory Virtual array structure

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Two-tuple balance of non-binary sequences with ideal two-level autocorrelation

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DISCRETE APPLIED MATHEMATICS 2006年第18期154卷 2590-2598页

作者： Gong, Guang Song, Hong-Yeop Univ Waterloo Dept Elect & Comp Engn Waterloo ON N2L 3G1 Canada Yonsei Univ CITY Sch Elect & Elect Engn Seoul 120749 South Korea

Let p be a prime, q = p(m) and F-q be the finite field with q elements. In this paper, we will consider q-ary sequences of period q(n)-1 for q > 2 and study their various balance properties: symbol-balance, difference-balance, and two-tuple-balance properties. The array structure of the sequences is introduced, and various implications between these balance properties and the array structure are proved. Specifically, we prove that if a q-ary sequence of period q(n)-1 is difference-balanced and has the "cyclic" array structure then it is two-tuple-balanced. We conjecture that a difference-balanced q-ary sequence of period q(n)-1 must have the cyclic array structure. The conjecture is confirmed with respect to all of the known q-ary sequences which are difference-balanced, in particular, which have the ideal two-level autocorrelation function when q = p. (c) 2006 Elsevier B.V. All rights reserved.

关键词： non-binary PN sequences array structure balance property difference-balance property two-tuple-balance property ideal two-level autocorrelation cyclic difference sets with singer type parameters

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ANALYSIS OF MAGNETOOPTICAL FARADAY-EFFECT IN DISCONTINUOUS MAGNETIC MEDIUM WITH PERIODIC AIR GAPS

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IEEE TRANSACTIONS ON MAGNETICS 1995年第6期31卷 3286-3288页

作者： ISAMOTO, K YAMAMOTO, T INOUE, M FUJII, T Department of Electrical & Electronic Engineering Toyohashi University of Technology Toyohashi Aichi Japan

Magneto-optical Faraday effect in discontinuous magnetic media was analyzed by employing the matrix approach method. The discontinuous media have a one-dimensional array structure composed of magnetic materials (width D-M) and air gaps (width D-G) which are aligned alternately. The analysis reveals that, when the medium meets the condition of D-Mstructure.

关键词： discontinuous construction magnetic media Faraday effect undirectional approach AIR GAP Analysis Discontinuous array structure

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Magnetically Assembled Ultrablack Surface with Omnidirectional and Broadband Light Absorption

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ACS APPLIED MATERIALS & INTERFACES 2023年第8期15卷 11369-11378页

作者： Li, Huiyong Shen, Chen Sun, Shuai Li, Chun Zhang, Hui Zhang, Zhong Tsinghua Univ Dept Chem Lab Flexible Elect Technol Key Lab Organ Optoelect Beijing 100084 Peoples R China CAS Ctr Excellence Nanosci Natl Ctr Nanosci & Technol CAS Key Lab Nanosyst & Hierarch Fabricat Beijing 100190 Peoples R China Univ Sci & Technol China Dept Modern Mech CAS Key Lab Mech Behav & Design Mat Hefei 230027 Anhui Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China

Ultrablack surfaces with stable and omnidirectional light absorption over a wide spectral range are fundamentally crucial for applications concerning strict optical requirements from high-end optical to solar-heat conversion devices. Inspired by nature, we report a needle-like array structure (NAS) prepared by spraying and self-assembling the magnetic composite ink under an external magnetic field. With high structure regularity and small feature size, the NAS presents extremely low hemispherical reflectance (<= 0.3%) over a wide spectral range of 300-2000 nm and stable omnidirectional absorption (incident angle insensitivity up to 70 degrees), which could be one of the darkest surfaces ever reported. The exciting light absorption performance can be attributed to the synergistic effects of (1) structural absorption caused by multiple scattering between array units and (2) strong forward scattering and high light absorptivity of magnetic particles. The NAS exhibits outstanding photothermal conversion for solar harvesting, self-cleaning performance, good flexibility, and thermal-aging resistance, offering an appealing alternative to construct ultrablack surfaces for practical applications.

关键词： ultrablack surface array structure structural absorption omnidirectional absorption magnetically driven self-assembly

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Photoelectrocatalytic effect of unbalanced RF magnetron sputtered TiO₂ thin film on ITO-coated patterned SiO₂ nanocone arrays

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CATALYSIS SCIENCE & TECHNOLOGY 2018年第3期8卷 898-906页

作者： Choi, Gyu Jin Jung, Hyemin Kim, Dong Ho Sohn, Youngku Gwag, Jin Seog Yeungnam Univ Dept Phys Gyongsan 38541 Gyeongbuk South Korea Chungnam Natl Univ Dept Chem Daejeon 34134 South Korea

TiO2 has displayed potential for improved catalytic activity using a newly designed morphological system. Herein, a new catalytic system of SiO2/ITO/TiO2 nanocone array structures with unbalanced RF sputtering deposition was developed and demonstrated for photoelectrocatalytic activity. The array structures were fabricated using a soft nanolithography technique with a SiO2 sphere-patterned polydimethylsiloxane stamp. TiO2 films were coated on the ITO-coated SiO2 nanocones using unbalanced RF magnetron sputtering with various external magnetic fields applied by a solenoid. The nanostructures were examined using scanning electron microscopy, high-resolution transmission electron microscopy, X-ray diffraction crystallography, and X-ray photoelectron spectroscopy. The photocurrent response in water splitting was found to be increased by 400% for TiO2 films on nano-patterned arrays, compared with that on a flat surface. An additional increase in photocatalytic activity was achieved via TiO2 film deposition with an external magnetic field of 6 mT. This dramatic enhancement was attributed to the surface active sites created by the additional applied magnetic field and the increased surface area of the nanocone arrays.

关键词： magnetic field RF magnetrons arrays exterior magnetic field RF sputter deposition thin films High resolution transmission electron microscopy RF magnetron sputtering nanocone surface area Catalyst activity array structure

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Architecture of a unified split P-shaped swarming metamaterial for thermal mutation

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MICROWAVE AND OPTICAL TECHNOLOGY LETTERS 2018年第6期60卷 1388-1395页

作者： Alam, Jubaer M. Faruque, Mohammad R. I. Hossain, Mohammad J. Islam, Mohammad T. Univ Kebangsaan Malaysia Space Sci Ctr ANGKASA Bangi 43600 Selangor Ukm Malaysia Univ Kebangsaan Malaysia Fac Engn & Built Environm Dept Elect Elect & Syst Engn Bangi 43600 Selangor Ukm Malaysia

The article imparts the architecture of a compact and combined split P-shaped metamaterial unit cell that is felicitous for dual band of microwave frequency and it shows negative permeability and permittivity at those frequencies. Two split P-shaped resonators are connected to each other by a metal ink to increase the electrical length and two modified split-ring resonators (SRR) reside inside each of it. The 10 x 10 mm(2) structure has been printed on FR-4 and a correlation is made between the basic unit cell and array structures. An analogy was contrived on the performance after the analysis of unit cell and array structures to validate the performance of the proposed metamaterial. A great transmission coefficient having a band of 13GHz with a 500MHz band gap at the middle is demonstrated for all of these configurations. The effective parameters of the resonators cover C, X, and Ku-band independently with double negative phenomena at X and Ku-band with a frequency range of about 1.31GHz. Having an auspicious design and wide range double negative characteristics, this structure can be applicable to convert radiation into usable form.

关键词： array structure double negative metamaterials radiation

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AlPO4 film with transparent anti-fogging function imitating cicada wings

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THIN SOLID FILMS 2023年第1期781卷

作者： Wang, Jinlei Wang, Qiuqin Xu, Jiaxin Li, Gang Ge, Jinlong Li, Zongqun Zhang, Youfa Bao, Tian Jiao, Yuhong Wang, Dong Jin, Kewu Gan, Zhiping CNBM Res Inst Adv Glass Mat Grp Co Ltd State Key Lab Adv Technol Float Glass Bengbu 233010 Peoples R China Bengbu Univ Dept Mat & Chem Engn Anhui Prov Engn Lab Silicon Based Mat Bengbu 233030 Peoples R China Southeast Univ Sch Mat Sci & Engn Jiangsu Key Lab Adv Met Mat Nanjing 211189 Peoples R China

Glass surface fogging is a common problem in life. Here we provide a simple method to prepare an anti-fogging AlPO4 array that imitating cicada wings. The size of AlPO4 array can be adjusted by the concentration of the coating solution, the environmental humidity during the drying self-assembly process and the drying time. To explain the mechanism of morphology control, a model analysis was carried out based on surface tension, marangoni convection and a low temperature drying process. It is further realized the regulation of the hierarchical structure through the introduction of self-hygroscopic materials and a multi-step drying process based on the above theoretical model. The size of the array affects its performance. Nano AlPO4 array imitating cicada wing structure has great application value in the anti-fog field because of its high transparency, low haze, superspreadability and wear resistance. The super-spreading anti-fog performance is achieved through the synergistic effect of surface hydroxyl groups, the bionanometer nanoarray structure and the internal pore structure.

关键词： Aluminum phosphate array structure Bionics Anti-fogging coating Surface tension

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A Conformal Metamaterial with Wide DNG Region for C and X Microwave Bands

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IETE JOURNAL OF RESEARCH 2023年第3期69卷 1446-1459页

作者： Negi, Deepa Khanna, Rajesh Kaur, Jaswinder Thapar Inst Engn & Technol Dept Elect & Commun Engn Patiala Punjab India

In this paper, a novel shaped and conformal, 14.8 mm x 14.8 mm sized unit cell on a flexible substrate, showing DNG phenomena at C (4-8 GHz) and X band (8.8-10.5 GHz, 11.2-11.6 GHz) is designed. The metamaterial offers 6.1 GHz of whole DNG region, transmission coefficient with stopband of 8.6 GHz ranging from 2 to 16 GHz and a broad 10 GHz NRI region from 2 to 12 GHz. The 1 x 2, 2 x 2, and 4 x 4 array formations of designed metamaterial too maintains DNG characteristics. Measured and simulated transmission coefficient curve of the designed unit cell are in good agreement.

关键词： array structure Broad negative refractive index (NRI) region Combined metamaterial Conformal metamaterial C and X band applications Double negative (DNG) features

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