Herein, we demonstrate for the first time the fabrication of concave trisoctahedral Ag(3)PO(4) microcrystals enclosed by {221} and {332} facets based on the heteroepitaxial growth procedure, which exhibit much higher photocatalytic activities than cubic Ag(3)PO(4) and commercial N-doped TiO(2).
<p class="MsoNormal" style="text-align: left; margin: 0cm 0cm 0pt;" align="left"><span class="text"><span style="font-family: ";Arial";,";sans-serif";; font-size: 9pt;">Sequential pattern mining is an important data mining method with broad applications that can extract frequent sequences while maintaining their order. However, it is important to identify item intervals of sequential patterns extracted by sequential pattern mining. For example, a sequence < A;B > with a 1-day interval and a sequence < A;B > with a 1-year interval are completely different; the former sequence may have some association, while the latter may not. To adopt item intervals, two approaches have been proposed for integration of item intervals with sequential pattern mining; (1) constraint-based mining and (2) extended sequence-based mining. However, although constraint-based mining approach avoids the extraction of sequences with non-interest time intervals such as too long intervals it has setbacks in that it is difficult to specify optimal constraints related to item interval, and users must re-execute constraint-based algorithms with changing constraint values. On the other hand, extended sequence-based mining approach does not need to specify constraints and re-execute. Since extended sequence-based mining approach cannot adopt any constraints based on time intervals, it may extract meaningless patterns, such as sequences with too long item intervals. This means these two approaches have not only advantages but also disadvantages. To solve this problem, in this paper, we generalize sequential pattern mining with item interval. The generalization includes three points; (a) a capability to handle two kinds of item interval measurement, item gap and time interval, (b) a capability to handle extended sequences which are defined by inserting pseudo items based on the interval itemization function, and (c) adopting four item interval constraints. Generalized sequential pattern mining is able to substitute all types of conventional sequential pattern mining algorithms with item intervals. Using Japanese earthquake data, we have confirmed that our proposed algorithm is able to extract sequential patterns with item interval, defined in a flexible manner by the interval itemization function.</span></span><span style="font-family: ";Arial";,";sans-serif";; font-size: 9pt;"></span></p>
Tetrahedral Ag 3 PO 4 submicro-crystals have been fabricated in highyield by directly reacting commercial Ag foils with H 2 O 2 and NaH 2 PO 4 in aqueous solution at room temperature, which exhibit higher photocatalytic activities than Ag 3 PO 4 cubes, particles, and N-doped TiO 2 for the degradation of organic contaminants under visible light irradiation.
This article employs a feminist political economy perspective to explore the connection between e-commerce, entrepreneurship and gender in rural China. It discusses gendered engagement with, and discourses of, the new digital economy represented by Taobao villages, and asks: how has the success of rural e-commerce impacted the evolving gender mandate and hierarchy in a competitive market economy in rural China? Has rural women's participation in digital economic activities changed their gendered roles and the patriarchal structure in their family and village? This article argues that women's socioeconomic enablement does not necessarily translate into cultural and political empowerment. The enabling potential of female entrepreneurship is tempered by traditional constraints on women and digital capitalist exploitation of their cheap, flexible and docile labour.
Two-dimensional dendritic Ag(3)PO(4) nanostructures have been synthesized in high-yield by reacting Ag nanowires with H(2)O(2) and NaH(2)PO(4) in aqueous solution at room temperature, which exhibit much higher photocatalytic activities than irregular Ag(3)PO(4) nanocrystals and N-doped TiO(2) catalyst for the degradation of organic contaminants under visible light irradiation.
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