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- 저자 : Yang Mannan (검색결과 3 건)
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Yang Mannan,Fang Changqing,Su Jian,Zeng Huilin,Lin Qilang 한국탄소학회 2023 Carbon Letters Vol.33 No.4
In this study, waste corrugated paper was used as carbon precursor with KOH-NaOH mixture (mole ratio was 51:49 and the melting point is 170 °C) as activator to prepare porous carbon at different reaction temperature and different mass ratio of KOH-NaOH mixture/waste corrugate paper fiber. The micro-morphology, pore structure information and composition of porous carbon were analyzed, and the formation mechanism of pores was investigated. The effect of activator amount and pyrolysis temperature on the morphology and structure of porous carbon were studied. The adsorption capacity of porous carbon was evaluated with the methylene blue as model pollutant. The effect of adsorbent amount, adsorption time and temperature on the adsorption performance of the porous carbon were analyzed. The maximum specific surface area is 1493.30 m2·g−1 and the maximum adsorption capacity of methylene blue is 518 mg·g−1. This study provides a new idea for efficient conversion and utilization of waste paper.
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Exact Analysis and Physical Realization of the 6-Lobe Chua Corsage Memristor
Mannan, Zubaer I.,Yang, Changju,Adhikari, Shyam P.,Kim, Hyongsuk Hindawi Limited 2018 Complexity Vol.2018 No.-
<P>A novel generic memristor, dubbed the <I>6-lobe Chua corsage memristor</I>, is proposed with its nonlinear dynamical analysis and physical realization. The proposed corsage memristor contains <I>four</I> asymptotically stable equilibrium points on its complex and diversified dynamic routes which reveals a <I>4-state nonlinear memory device</I>. The higher degree of versatility of its dynamic routes reveal that the proposed memristor has a variety of dynamic paths in response to different initial conditions and exhibits a highly nonlinear <I>contiguous</I> DC <I>V</I>-<I>I</I> curve. The DC <I>V</I>-<I>I</I> curve of the proposed memristor is endowed with an explicit <I>analytical parametric representation</I>. Moreover, the derived <I>three formulas</I>, exponential trajectories of state <TEX>$ x_{n}\left(t\right)$</TEX> , time period <TEX>$ t_{fn}$</TEX> , and minimum pulse amplitude <TEX>$ V_{A}$</TEX> , are required to analyze the movement of the state trajectories on the piecewise linear (PWL) dynamic route map (DRM) of the corsage memristor. These <I>formulas</I> are universal, that is, applicable to any <I>PWL DRM curves</I> for any <I>DC</I> or <I>pulse input</I> and with any <I>number of segments</I>. Nonlinear dynamics and circuit and system theoretic approach are employed to explain the <I>asymptotic quad-stable behavior</I> of the proposed corsage memristor and to <I>design</I> a <I>novel real memristor emulator</I> using <I>off-the-shelf</I> circuit components.</P>
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A Metro WDM Star Network with a Hybrid MAC Protocol Based on an Arrayed Waveguide Grating
Kirmani, Syed Abdul Mannan,Shin, Seo-Yong,Yang, Hyo-Sik Optical Society of Korea 2007 Current Optics and Photonics Vol.11 No.2
In this paper, we introduce a reliable, scalable, and cost-effective switchless wavelength division multiplexing (WDM) network based on a quality-of-service supporting reservation-based medium access control (MAC) protocol. The protocol not only provides both packet and circuit switching but also supports multicasting. The network efficiency is significantly increased by spatially reusing wavelengths and exploiting multiple free spectral ranges (FSRs) of arrayed waveguide grating (AWG) employed in the architecture. We have demonstrated the feasibility of this architecture by simulating in $Optsim^{TM}$.
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