Browsing by Author "Hsu, Wan-Ting"

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Effects of environmentally benign solvents in the agarose gel electrolytes on dye-sensitized solar cells
(2011-07-01)
Hsu, Hsin-Ling
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Hsu, Wan-Ting
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Leu, Jihperng
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材料科學與工程學系
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Department of Materials Science and Engineering
The ionic agarose gel electrolytes are prepared by using environmental benign solvents and co-solvents to improve the agarose solubility and capacities of the additives for dye-sensitized solar cells. The effects of single solvents (dimethyl sulfoxide (DMSO), propylene carbonate (PC), propylene glycol, triethylene glycol, and tetraethylene glycol) and DMSO-based co-solvents are examined on the conductivities, diffusion coefficients of triiodide, and energy conversion efficiencies. The highest conductivity, 14.2 mS cm(-1), and the highest diffusion coefficient of triiodide, 2.7 x 10(-6) cm(2) s(-1), are achieved for the electrolyte containing the co-solvent of 80 vol.% PC and 20 vol.% DMSO. The environmental benign co-solvent such as DMSO/PC can significantly increase the conversion efficiency to 3.4% with agarose compared to pure MPII with agarose (1.4%), while retaining similar to 80% of the energy conversion efficiencies of the reference cell without agarose under the illumination at AM 1.5, 100 mW cm(-2). (C) 2011 Elsevier Ltd. All rights reserved.
Skyline Travel Routes: Exploring Skyline for Trip Planning
(2014-01-01)
Hsu, Wan-Ting
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Wen, Yu-Ting
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Wei, Ling-Yin
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Peng, Wen-Chih
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資訊工程學系
In this paper, given a spatial range Q and a set of query points specified by users, the goal of this paper is to return the travel routes that fulfill two requirements: 1.) travel routes should contain all those query points specified, and 2.) travel routes should be within the spatial range Q. Furthermore, we claim that each query point may have its proper visiting time. As such, the travel routes should go through these query points at their corresponding proper visiting time. To avoid some redundant information in the travel routes, we utilize the skyline concept to retrieve travel routes with more diversity. Specifically, in our paper, we consider some factors, such as the visiting time information of POIs and the set of query points, in retrieving travel routes. These factors could be mapped into dimensional spaces. Then, each travel route is viewed as a data point in the dimensional space. Thus, skyline data points (referred to as skyline travel routes) are returned as the query result. Skyline travel routes could provide more diversity in the query result of trip route recommendations. To evaluate our proposed methods, we conducted extensive experiments on real datasets. The experimental results show that skyline travel routes indeed provide more diversity in the query result. In addition, we evaluate the efficiency of retrieving skyline travel routes.