37,969 research outputs found
On Reducing the Effect of Covariate Factors in Gait Recognition: a Classifier Ensemble Method
No full textRobust human gait recognition is challenging because of the presence of covariate factors such as carrying condition, clothing, walking surface, etc. In this paper, we model the effect of covariates as an unknown partial feature corruption problem. Since the locations of corruptions may differ for different query gaits, relevant features may become irrelevant when walking condition changes. In this case, it is difficult to train one fixed classifier that is robust to a large number of different covariates. To tackle this problem, we propose a classifier ensemble method based on the random subspace Method (RSM) and majority voting (MV). Its theoretical basis suggests it is insensitive to locations of corrupted features, and thus can generalize well to a large number of covariates. We also extend this method by proposing two strategies, i.e, local enhancing (LE) and hybrid decision-level fusion (HDF) to suppress the ratio of false votes to true votes (before MV). The performance of our approach is competitive against the most challenging covariates like clothing, walking surface, and elapsed time. We evaluate our method on the USF dataset and OU-ISIR-B dataset, and it has much higher performance than other state-of-the-art algorithms
Developing Magnesium Alloys with a Combination of Strength and Ductility Based on Friction Stir-Based Technologies
No full textSome of the key data for the thesis "Developing Magnesium Alloys with a Combination of Strength and Ductility Based on Friction Stir-Based Technologies", including SEM/EDS/EBSD, and TEM data. They are stored in the .oipx format which can be opened by Aztec, .cpr which can be opened by AztecCrystal, and .csv and . tiff as spreadsheets and images.
Part of the data is associated with the following publications:
[1] X. Zhao, X. Zeng, L. Yuan, J. Gandra, Q. Hayat, M. Bai, W.M. Rainforth, D. Guan, A novel approach for producing Mg-3Al-1Zn-0.2 Mn alloy wire with a promising combination of strength and ductility using CoreFlowTM, Scripta Materialia 227 (2023) 115301.
[2] X. Zhao, Y. Xie, J. Gandra, M. Murphy, W.M. Rainforth, D. Guan, A Succinct Method to Recycle WE43 Mg Alloys—From Wasted Chips to Consolidated Billets, TMS Annual Meeting & Exhibition, Springer, (2024), 151-153.
[3] X. Zhao, D. Olden, B. Williams, A. Pariyar, D. Zhang, M. Murphy, P. Reed, P. Allison, B. Jordon, J. Qi, W. M. Rainforth, D. Guan, Grain growth stagnation at 525° C by nanoparticles in a solid-state additively manufactured Mg-4Y-3RE alloy, Journal of Magnesium and Alloys (2024), 4976-4987.
</span
A New Hydrindanone Synthesis
No full textThe Kanematsu transformation was employed for the preparation of tetrahydroisobenzofuran-4-carboxylic acid (12), alpha-methylation, subsequent conversion into the diazoethanone 14, and, finally, treatment with dirhodium tetraacetate of which furnished the hydrindanone 1 of the steroid C-D ring structure
Consumption value and behavior of freshmen
No full textYoung adults' consumption value is broadly concerned in China. Parents are worrying about their children's squandering in universities. This survey study investigated 330 freshmen's consumption value, including their quality and price awareness, coupon proneness, sale proneness, price-quality schema, prestige sensitivity, impulsive purchase, and their actual consuming behavior. More than 95% of them get family financial support and less than one fourth get school financial aid meanwhile. However, only one third or even less of them got detailed instructions about consumption from their parents. And, about half of these fresh undergraduates also lack control on their own consumption
A fast spectral quasi-likelihood approach for spatial point processes
No full textIn applications of spatial point processes, it is often of interest to fit a parametric model for the intensity function. For this purpose Guan et al. (2015) recently introduced a quasi-likelihood type estimating function that is optimal in a certain class of first-order estimating functions. However, depending on the choice of certain tuning parameters, the implementation suggested in Guan et al. (2015) can be very demanding both in terms of computing time and memory requirements. Using a novel spectral representation, we construct in this paper an implementation that is computationally much more efficient than the one proposed in Guan et al. (2015).</p
The genetic diversity and geographical separation study of Oncomelania hupensis populations in mainland China using microsatellite loci
No full text© 2016 Guan et al. Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0
International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and
reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to
the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver
(http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. The attached file is the published version of the article.NHM Repositor
Superconducting HgBa2CaCu2Oy thin films growth on NdGaO3, SrTiO3, LaAlO3 and Y-ZrO2 substrates
No full textSuperconducting HgBa2CaCu2Oy (Hg-1212) films have been fabricated on (110) NdGaO3, (100) SrTiO3, (100) LaAlO3 and (100) Y-ZrO2 substrates by a two-step process. Good reproducible superconducting properties, zero resistance temperatures (T-c) > 115 K and critical current density (J(c)) > 4000 MA/m(2) at 77 K in zero field, are obtained. X-ray diffraction patterns indicate that the films have an epitaxial structure with the c-axis perpendicular to the surface. Scanning electron microscopy measurements show a layered growth structure with square and octagonal grains on the Hg-1212 film surfaces. (110) NdGaO3 is demonstrated to be a good substrate for growing the Hg-cuprate thin films. A lower superconducting transition temperature is observed in films deposited on Y-ZrO2 substrates, which can be attributed to variations of the microstructure in the films. (C) 1999 Elsevier Science B.V. All rights reserved.Physics, AppliedSCI(E)EI18ARTICLE3-4197-20131
Integrity protection for code-on-demand mobile agents in e-commerce
No full textThe mobile agent paradigm has been proposed as a promising solution to facilitate distributed computing over open and heterogeneous networks. Mobility, autonomy, and intelligence are identified as key features of mobile agent systems and enabling characteristics for the next-generation smart electronic commerce on the Internet. However, security-related issues, especially integrity protection in mobile agent technology, still hinder the widespread use of software agents: from the agent’s perspective, mobile agent integrity should be protected against attacks from malicious hosts and other agents. In this paper, we present Code-on-Demand(CoD) mobile agents and a corresponding agent integrity protection scheme. Compared to the traditional assumption that mobile agents consist of invariant code parts, we propose the use of dynamically upgradeable agent code, in which new agent function modules can be added and redundant ones can be deleted at runtime. This approach will reduce the weight of agent programs, equip mobile agents with more flexibility, enhance code privacy and help the recoverability of agents after attack. In order to meet the security challenges for agent integrity protection, we propose agent code change authorization protocols and a double integrity verification scheme. Finally, we discuss the Java implementation of CoD mobile agents and integrity protection
Confined Fe(2)O(3) nanoparticles on graphite foam as high-rate and stable lithium-ion battery anode
No full textTiny Fe2O3 nanoparticles uniformly confined on 3D graphite foam have been achieved by atomic layer deposition. The material demonstrates high‐rate (even charge/discharge at ≈30 C) and stable (95.8% of the capacity can be retained even after 4000 cycles) electrochemical performance when utilized as a lithium‐ion battery anode.Cao Guan, Dongliang Chao, Yadong Wang, John Wang, Jinping Li
- …
