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2. AF-DCGAN: Amplitude Feature Deep Convolutional GAN for Fingerprint Construction in Indoor Localization Systems

Author

Li, Qiyue, Qu, Heng, Liu, Zhi, Zhou, Nana, Sun, Wei, Sigg, Stephan, and Li, Jie

Subjects
Computer Science - Networking and Internet Architecture
Abstract

With widely deployed WiFi network and the uniqueness feature (fingerprint) of wireless channel information, fingerprinting based WiFi positioning is currently the mainstream indoor positioning method, in which fingerprint database construction is crucial. However, for accuracy, this approach requires enough data to be sampled at many reference points, which consumes excessive efforts and time. In this paper, we collect Channel State Information (CSI) data at reference points by the method of device-free localization, then we convert collected CSI data into amplitude feature maps and extend the fingerprint database using the proposed Amplitude-Feature Deep Convolutional Generative Adversarial Network (AF-DCGAN) model. The use of AF-DCGAN accelerates convergence during the training phase, and substantially increases the diversity of the CSI amplitude feature map. The extended fingerprint database both reduces the human effort involved in fingerprint database construction and the accuracy of an indoor localization system, as demonstrated in the experiments.

Published
2018

7. sj-pdf-1-aas-10.1177_00953997211035721 – Supplemental material for Community Diversity and Donor Control: An Empirical Analysis of Contributions to Donor-Advised Funds at Community Foundations

Author

Qu, Heng and Paarlberg, Laurie E.

Subjects
160509 Public Administration, FOS: Political science, 160607 International Relations
Abstract

Supplemental material, sj-pdf-1-aas-10.1177_00953997211035721 for Community Diversity and Donor Control: An Empirical Analysis of Contributions to Donor-Advised Funds at Community Foundations by Heng Qu and Laurie E. Paarlberg in Administration & Society

Published
2021
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8. Community Diversity and Donor Control: An Empirical Analysis of Contributions to Donor-Advised Funds at Community Foundations.

Author

Qu, Heng and Paarlberg, Laurie E.

Subjects
DONOR-advised funds, CULTURAL pluralism, COMMUNITY foundations, PUBLIC goods, PUBLIC spending, CHARITABLE giving
Abstract

This study examines the relationship between community ethnic-racial diversity and contributions to donor-advised funds (DAFs) held by community foundations. Unlike general contributions, DAFs allow donors to retain advisory control over their fund distribution based on individual preferences. In contrast to prior research that generally finds that diversity dampens private provision of public goods, we show that greater ethnic-racial diversity is significantly associated with higher levels of contributions to DAFs at community foundations but not with general contributions. The findings contribute to the literature on diversity and public goods provision and have practical implications for the policy role of private philanthropy. [ABSTRACT FROM AUTHOR]

Published
2022
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9. I 2 -Mediated [3 + 3] Annulation for the Construction of Indole-Pyrimidine-Pyrazole-Fused Tetracyclic Heteroarenes.

Author

Qu HT, Zhou LS, Yang JX, Hong JH, Teng F, Xu K, and Feng CT

Abstract

An I 2 -mediated annulation of 3-aminopyrazoles with indole-3-carboxaldehydes has been demonstrated for the first time. This tandem strategy allows the facile construction of indole-pyrimidine-pyrazole-fused tetracyclic heteroarenes that are otherwise inaccessible by the existing methods. These fused heterocycles exhibited enhanced antifungal activities against Valsa mali and Botryosphaeria dothidea compared with commercial Xemium fungicide.

Published
2024
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