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Electrode layout of ZnO pyroelectric sensors
Chun-Ching Hsiao,Shih-Yuan Yu 대한기계학회 2011 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.25 No.11
In the present study, an electrode layout of pyroelectric sensors is developed to improve electric signals. Voltage responsivity is a main target to enhance the performance of pyroelectric sensors. A partially covered, top electrode has been proven to effectively increase the voltage responsivity of pyroelectric sensors. In the experimental results, the proposed electrode layout with an array type in ZnO pyroelectric sensors possessed higher voltage signals, about 3.6 times that of a fully covered type, and about 2 times that of a partially covered type. Moreover, a finite element model is used to explore the temperature variation rate in ZnO pyroelectric sensors for both the fully covered and the partially covered electrodes. In the simulation results, the partially covered electrode can indeed improve the temperature variation rate in the ZnO layer.
Dahms, Hans‐,Uwe,Tseng, Li‐,Chun,Hsiao, Shih‐,Hui,Chen, Qing‐,Chao,Hwang, Jiang‐,Shiou Springer Japan 2013 Ecological research Vol.28 No.2
<P><B>Abstract</B></P><P>The mesozooplankton of a river tributary in Oceania is evaluated and is correlated against environmental, abiotic, and biological attributes of this lotic system. Abundance, distribution, and the diversity of mesozooplankton was studied at nine stations including one estuarine station during ten sampling campaigns from June 2004 to December 2005 along the Lanyang River, the largest river and estuarine ecosystem in northeastern Taiwan. Mesozooplankton was dominated by copepods, cladocerans, and fish larvae. Among all samples, the highest abundances of mesozooplankton (5,049.36 individuals m<SUP>−3</SUP>) occurred in the estuary station in August 2004, which also corresponds to the highest salinities (37.0), indicating the marine role in shaping the estuarine planktonic assemblages. The abundance of mesozooplankton and number of mesozooplankton taxa were significantly higher in samples of the estuarine station than in the riverine stations (<I>p</I> < 0.05, one‐way ANOVA). The number of mesozooplankton taxa number was affected by water temperature (<I>r</I> = 0.697; <I>p</I> = 0.025, Pearson's correlation) that was primarily influenced by the weather that was in turn affected by seasonal monsoons.</P>
Tsai I-Chen,Li Sing-Ya,Hsiao Shih-Chun,Yu Hsiao 대한조선학회 2021 International Journal of Naval Architecture and Oc Vol.13 No.1
In this study, a newly enhanced Fluid-Structure Interaction (FSI) model which incorporates mooring lines was used to simulate a floating structure. The model has two parts: a Computational Fluid Dynamics (CFD) model and a mooring model. The open-source CFD OpenFOAM® v1712 toolbox was used in the present study, and the convergence criteria and relaxation method were added to the computational procedure used for the OpenFOAM multiphase flow solver, interDyMFoam. A newly enhanced, tightly coupled solver, CoupledinterDyMFoam, was used to decrease the artificial added mass effect, and the results were validated through a series of benchmark cases. The mooring model, based on the finite element method, was established in MATLAB® and was validated against a benchmark analytical elastic catenary solution and numerical results. Finally, a model which simulates a floating structure with mooring lines was successfully constructed by connecting the mooring model to CoupledinterDyMFoam.