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Semi-supervised Robust Feature Selection with ?q-Norm Graph for Multiclass Classification

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Chinese Journal of Electronics 2021年第4期30卷 611-622页

作者： LUO hui HAN Jiqing Harbin Institute of Technology

Flexible manifold embedding（FME） is a semi-supervised dimension reduction framework. It has been extended into feature selection by using different loss functions and sparse regularization methods. However,these kind of methods used the quadratic form of graph embedding, thus the results are sensitive to noise and outliers. In this paper, we propose a general semisupervised feature selection model that optimizes an ?norm of FME to decrease the noise sensitivity. Compare to the fixed parameter model, the ?-norm graph brings flexibility to balance the manifold smoothness and the sensitivity to noise by tuning its parameter. We present an efficient iterative algorithm to solve the proposed?-norm graph embedding based semi-supervised feature selection problem, and offer a rigorous convergence analysis. Experiments performed on typical image and speech emotion datasets demonstrate that our method is effective for the multiclass classification task, and outperforms the related state-of-the-art methods.

关键词： Feature selection Semi-supervised learning Flexible manifold embedding

Light People:Professor Lan Fu

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Light(Science & Applications) 2023年第12期12卷 2558-2564页

作者： hui Wang Cun Yu Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China

Editorial Ⅲ-Ⅴsemiconductors are compound semiconductor materials formed by combining group-Ⅲ and group-Ⅴ *** properties such as direct bandgap,high electron mobility,good homogeneity of large-size crystals and good lattice matching,they are widely used in micro-and opto-electronics,integrated circuits,laser communications,etc.,and promise great *** Light People is someone who has long been engaged in the research of Ⅲ-Ⅴsemiconductor materials,structures and *** is *** Fu from the Australian National University(ANU).As an outstanding student of *** Jagadish,President of the Australian Academy of Sciences,*** is not only a leading researcher in her field,but also a scientist with an independent *** is currently the Head of the Department of Electronic Materials Engineering,Research School of Physics,The Australian National University,where she leads a team in the research of Ⅲ-Ⅴsemiconductors.

关键词： someone matching Australian

Removal of a type of endocrine disruptors—di-n-butyl phthalate from water by ozonation

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Journal of Environmental Sciences 2006年第5期18卷 845-851页

作者： LI Hai-van QU Jiu-hui LIU hui-juan State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Department of Urban Construction Engineering Beijing Institute of Civil Engineering and Architecture Beijing 100044 China

Ozonation of synthetic water containing a type of endocrine disruptor-di-n-butyl phthalate （DBP） was examined. Key impact factors such as pH, temperature, ionic strength, ozone dosage and initial DBP concentration were investigated. In addition, the activities of radicals on uncatalysed and catalysed ozonation were studied. The degradation intermediate products were followed and the kinetic of the ozonation were assessed as well. Results revealed that ozonation of DBP followed two mechanisms. Firstly, the reaction rate of direct ozonation was slower at lower pH, temperature, and ionic strength. Secondly, when these factors were increased for indirect radical reaction, higher percentage of DBP was removed with the increase of the initial ozone dosage and the decrease of the initial DBP concentration. In addition, tea-butanol, humic substances and Fe（Ⅱ） affected DBP ozonation through the radical pathway. It was determined that ozonation was restrained by adding tea-butanol for its radical inhibition effect. Furthermore, humic substances enhanced the reaction to some extent, but a slight negative effect would be encountered if the optimum dosage was exceeded. As a matter of fact, Mn（Ⅱ） affected the ozonation by ＂active sites＂ mechanism. In the experiment, three different kinds of intermediate products were produced during ozonation, but the amount of products for each one of them decreased as pH, temperature, ionic strength and initial ozone dosage increased. A kinetic equation of the reaction between ozone and DBP was obtained.

关键词： di-n-butyl phthalate (DBP) ozonation key impact factors reaction kinetics degradation intermediate products

Finding patterns in subsurface using Bayesian machine learning approach

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Underground Space 2020年第1期5卷 84-92页

作者： hui Wang Department of Civil and Environmental Engineering and Engineering Mechanics University of DaytonDaytonOH 45469-0243United States

Stochastic simulation approaches and uncertainty quantification are usually adopted for gaining insight into variability in soil stratigraphy *** investigations at geotechnical site characterization and interpretation can be broadly categorized into geostatistics-and process-based *** the other hand,modern site exploration techniques provide high-quality,dense datasets in physical spaces with high resolution,either directly from sensors(for example,cone penetration testing data)or indirectly from geophysical inversion(such as seismic inversion,electromagnetic induction inversion,and ground penetrating radar).In this work,anisotropy and heterogeneity are considered as possible patterns that inherently exist in the observations,and these are inferred and described in a Bayesian *** this end,a Bayesian machine learning approach is employed to extract these patterns from the original or interpreted *** patterns are divided into two parts:spatial and statistical *** patterns are considered as the"hidden link"among multiple spatial *** proposed modeling method is demonstrated using a real-world,one-dimensional example as well as two two-dimensional numerical *** is revealed that the proposed clustering approach is a promising tool for subsurface modeling and pattern extraction.

关键词： Subsurface modeling Pattern extraction Machine learning Bayesian Random field

Integrative Medicine on Optimizing Clopidogrel and Aspirin Therapy

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Chinese Journal of Integrative Medicine 2019年第5期25卷 395-400页

作者： CHEN hui Department of Internal Medicine Fujian Provincial Cardiovascular Disease Institutethe Shengli Clinical Medical College of Fujian Medical UniversityFuzhou(350001)China

This article reviews the available published data on optimizing clopidogrel and aspirin therapy using translational and integrative medicine. Translational and evidence-based medical studies show that the CYP2 C19 gene mutation(CYP2 C19*2 and CYP2 C19*3) could affect > 50% of the Chinese population, and that this mutation is closely associated with clopidogrel resistance and an increased risk of major adverse cardiovascular events, particularly stent thrombosis in patients following percutaneous coronary intervention(PCI). Adjusted-dose warfarin and aspirin reduce stroke in patients with atrial fibrillation(AF), and warfarin is substantially more efficacious than aspirin. However, a poor compliance is a big problem in warfarin use especially in China. The genetic variants of vitamin K expoxide reductase might account for the universally lower warfarin dosage used in Chinese population. The available evidence indicates that the integrating mainstream treatments(e.g., clopidogrel, CYP2 C19 genotyping) and non-mainstream medicines [e.g., Chinese medicines,Naoxintong Capsule(脑心通胶囊, NXT)] to treat CYP2 C19 gene mutation patients following PCI can be *** combined NXT and the adjusted-dose warfarin was equally effective in elderly patients with non-valvular AF in prevention of ischemic stroke.

关键词： integrative medicine clopidogrel aspirin optimizing therapy Chinese medicine

PE-EDD:An efficient peer-effect-based financial fraud detection approach in publicly traded China firms

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CAAI Transactions on Intelligence Technology 2022年第3期7卷 469-480页

作者： hui Xia hui Ma Ping Cheng School of accounting Chongqing University of TechnologyChongqingChina Chongqing Rural Commercial Bank ChongqingChina

Financial fraud arises from the exaggeration of business interests,and an accurate detection or prediction is a useful tool for both corporate management and capital market systems.A collection of computer technologies has been made on this problem so far,and one of the most important solutions is unsupervised learning *** them,most approaches work by analysing the internal relations in financial data and finding a new description of non-fraud ***,current studies focus a lot on the geometry attribute of financial data,while overlooking the obvious behaviour patterns and peer effects among *** has limited the accuracy of representation and furthermore the detection *** this work,a very general class of functions is allowed to represent firms,constraining them by peer effects between firms and presenting an error-distribution-based financial fraud firm detection *** results have shown great performance of the proposed approach.

关键词： detection financial fraud NMF peer effect

超碱NLi_(4)团簇修饰DHQ石墨烯的储氢性能研究

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原子与分子物理学报 2025年第5期42卷 95-101页

作者：戴小乐王允辉黄欣南京邮电大学电子与光学工程学院柔性电子(未来技术)学院南京210023 南京邮电大学理学院南京210023

基于第一性原理计算,系统研究了超碱NLi_(4)团簇修饰在DHQ石墨烯表面上的几何结构及吸附能等性质,并深入探索了其储氢性能.研究结果表明:超碱NLi_(4)团簇可以稳定均匀地吸附在DHQ石墨烯表面,Li原子与N原子的强结合能有效避免了Li原子发... 详细信息

基于第一性原理计算,系统研究了超碱NLi_(4)团簇修饰在DHQ石墨烯表面上的几何结构及吸附能等性质,并深入探索了其储氢性能.研究结果表明:超碱NLi_(4)团簇可以稳定均匀地吸附在DHQ石墨烯表面,Li原子与N原子的强结合能有效避免了Li原子发生团聚.每个NLi_(4)团簇周围最多可吸附11个氢气分子,平均吸附能为0.20 eV,最大储氢容量为12.05 wt%,达到美国能源部制定的2025年储氢目标5.5 wt%.最后,基于相对能量计算,发现当压强大于84 bar时,该储氢体系可以在室温下稳定存在.以上结果表明经超碱NLi_(4)团簇修饰的DHQ石墨烯是一种有潜力的储氢材料.

关键词：多孔材料储氢超碱NLi_(4)团簇 DHQ石墨烯第一性原理计算

Multiple Forced Rotational Solutions for the Planar N-pendulum Equation

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Acta Mathematica Sinica,English Series 2018年第2期34卷 171-193页

作者： hui QIAO School of Mathematics and Statistics Wuhan University

Abstract This paper presents a theorem of existence of （N - N0＋1）2No noncontractible periodic orbits of any given rotational vector with zero components for the planar forced N-pendulum equation, where No denotes the number of zero components of given rotational vector. We make special arrangements for masses and length instead of the nondegenerate assumption. Moreover, for rotational vectors with identical components, similar results are also obtained.

关键词： Critical points Lusternik-Schnirelman theory rotational solution multiplicity planar N-pendulum

Synthesis and application of bilayer-surfactant-enveloped Fe_3O_4 nanoparticles: water-based bilayer-surfactant-enveloped ferrofluids

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International Journal of Minerals,Metallurgy and Materials 2016年第2期23卷 234-240页

作者： Bai-yi Chen Jian-hui Qiu hui-xia Feng Department of Machine Intelligence and Systems Engineering Faculty of Systems Engineering Akita Prefectural University College of Petrochemical Technology Lanzhou University of Technology

Superparamagnetic carbon-coated Fe3O4 nanoparticles with high magnetization（85 emu·g-（-1）） and high crystallinity were synthesized using polyethylene glycol-4000（PEG（4000）） as a carbon ***3O4 water-based bilayer-surfactant-enveloped ferrofluids were subsequently prepared using sodium oleate and PEG（4000） as *** using X-ray photoelectron spectroscopy,X-ray diffraction,and Fourier-transform infrared spectroscopy indicate that the Fe3O4 nanoparticles with a bilayer surfactant coating retain the inverse spinel-type structure and are successfully coated with sodium oleate and PEG（4000）.Transmission electron microscopy,vibrating sample magnetometry,and particle-size analysis results indicate that the coated Fe3O4 nanoparticles also retain the good saturation magnetization of Fe3O4（79.6 emu·g^-1） and that the particle size of the bilayer-surfactant-enveloped Fe3O4 nanoparticles is 42.97 nm,which is substantially smaller than that of the unmodified Fe3O4 nanoparticles（486.2 nm）.UV-vis and zeta-potential analyses reveal that the ferrofluids does not agglomerate for 120 h at a concentration of 4 g·L^-1,which indicates that the ferrofluids are highly stable.

关键词： magnetic fluids iron oxides nanoparticles bilayers sodium oleate polyethylene glycol