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Boosting Multi-modal Ocular Recognition via Spatial Feature Reconstruction and Unsupervised Image Quality Estimation

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Machine Intelligence Research 2024年第1期21卷 197-214页

作者： Zihui Yan yunlong wang Kunbo Zhang Zhenan Sun Lingxiao He Center for Research on Intelligent Perception and Computing National Laboratory of Pattern RecognitionInstitute of AutomationChinese Academy of SciencesBeijing 100190China JD AI Research Beijing 100176China

In the daily application of an iris-recognition-at-a-distance(IAAD)system,many ocular images of low quality are acquired.As the iris part of these images is often not qualified for the recognition requirements,the more accessible periocular regions are a good complement for recognition.To further boost the performance of IAAD systems,a novel end-to-end framework for multi-modal ocular recognition is proposed.The proposed framework mainly consists of iris/periocular feature extraction and matching,unsupervised iris quality assessment,and a score-level adaptive weighted fusion strategy.First,ocular feature reconstruction(OFR)is proposed to sparsely reconstruct each probe image by high-quality gallery images based on proper feature maps.Next,a brand new unsupervised iris quality assessment method based on random multiscale embedding robustness is proposed.Different from the existing iris quality assess-ment methods,the quality of an iris image is measured by its robustness in the embedding space.At last,the fusion strategy exploits the iris quality score as the fusion weight to coalesce the complementary information from the iris and periocular regions.Extensive experi-mental results on ocular datasets prove that the proposed method is obviously better than unimodal biometrics,and the fusion strategy can significantly improve therecognition performance.

关键词： Iris recognition periocular recognition spatial feature reconstruction fully convolutional network flexible matching unsupervised iris quality assessment adaptive weight fusion

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CASIA-Iris-Africa:A Large-scale African Iris Image Database

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Machine Intelligence Research 2024年第2期21卷 383-399页

作者： Jawad Muhammad yunlong wang Junxing Hu Kunbo Zhang Zhenan Sun School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100049China Center for Research on Intelligent Perception and Computing National Laboratory of Pattern RecognitionInstitute of AutomationChinese Academy of SciencesBeijing 100190China

Iris biometrics is a phenotypic biometric trait that has proven to be agnostic to human natural physiological changes.Research on iris biometrics has progressed tremendously,partly due to publicly available iris databases.Various databases have been available to researchers that address pressing iris biometric challenges such as constraint,mobile,multispectral,synthetics,long-distance,contact lenses,liveness detection,etc.However,these databases mostly contain subjects of Caucasian and Asian docents with very few Africans.Despite many investigative studies on racial bias in face biometrics,very few studies on iris biometrics have been published,mainly due to the lack of racially diverse large-scale databases containing sufficient iris samples of Africans in the public domain.Furthermore,most of these databases contain a relatively small number of subjects and labelled images.This paper proposes a large-scale African database named Chinese Academy of Sciences Institute of Automation(CASIA)-Iris-Africa that can be used as a complementary database for the iris recognition community to mediate the effect of racial biases on Africans.The database contains 28717 images of 1023 African subjects(2046 iris classes)with age,gender,and ethnicity attributes that can be useful in demographically sensitive studies of Africans.Sets of specific application protocols are incorporated with the database to ensure the database’s variability and scalability.Performance results of some open-source state-of-the-art(SOTA)algorithms on the database are presented,which will serve as baseline performances.The relatively poor performances of the baseline algorithms on the proposed database despite better performance on other databases prove that racial biases exist in these iris recognition algorithms.

关键词： African iris recognition racial bias iris image database biometrics iris recognition

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Implementation of integrated nonlocal sensing for object shape and rotational speed

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Science China(Physics,Mechanics & Astronomy) 2024年第7期67卷 6-12页

作者： Zhenyu Guo yunlong wang Zehong Chang Jiawei wang Junliang Jia Pei Zhang Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic DevicesSchool of PhysicsXi’an Jiaotong UniversityXi’an 710049China

The expeditious acquisition of information pertaining to objects through the utilization of quantum technology has been a perennial issue of concern.So far,the efficient utilization of information from dynamic objects with limited resources remains a significant challenge.Here,we realize a nonlocal integrated sensing of the object's amplitude and phase information by combining digital spiral imaging with the correlated orbital angular momentum states.The amplitude information is utilized for object identification,while the phase information enables us to determine the rotational speed.We demonstrate the nonlocal identification of a rotating object's shape,irrespective of its rotational symmetry,and introduce the concept of the correlated rotational Doppler effect,establishing a fundamental connection between this effect and the classical rotational Doppler effect,i.e.,that both rely on extracting crucial information from the spiral spectrum of objects.The present study highlights a promising pathway towards the realization of quantum remote sensing and imaging.

关键词： digital spiral imaging orbital angular momentum correlated rotational Doppler effect

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Applying heteroatom co-doped carbon nanotube for manifesting high performance in the electrochemical reduction of aqueous nitrogen oxide by gold nanoparticles

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Nano Research 2024年第3期17卷 1151-1164页

作者： Jane Chung Haibo Yin Rong wang yunlong wang Junyang Zhang Yue Peng Joung Woo Han Seongyun Ryu Junhua Li State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China EHS Research Center Samsung Electronics Co.Ltd.Gyeonggi-do 18448Republic of Korea

Electrochemical NO-to-NH_(3) under ambient conditions could be a viable alternative having advantages in terms of energy consumption and exhaust gas recycling of NO,replacing a traditional ammonia synthesis method of the Haber–Bosch process.In synthesizing boron(B-)and nitrogen(N-)co-doped carbon nanotube(CNT)based gold(Au)catalysts,B-dopants elevate the conductivity of carbon nanotube by sp2 hybridization on graphene and implant B–N domains within the graphene layer,and result in facilitating the embedding amount of Au accompanied by high dispersibility with low particle size.Theoretical density functional theory(DFT)calculations elucidate that the electron cloud transmitted from B-dopant to the active site of Au induces the Lewis acidic site,and the O-distal pathway occurs following a spontaneous reaction.Increment of the electron-deficient B-doping area accompanied by N-defects and B–O edges retains the major valence state of Au as Au^(δ+),and suppresses hydrogen evolution reaction(HER)by repulsing the hindrance of H*.This record exhibits the highest faradaic efficiency(FE)of 94.7%,and NH_(3) yield rate of 1877.4μg·h^(-1)·mg_(cat)^(-1),which is the optimal yield over energy consumption in the field of the ambient reduction of aqueous NO.

关键词： boron heteroatom nitrogen defect gold nanoparticles valence states of gold electrochemical NO-to-NH3

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Liquid-liquid phase separation in DNA double-strand break repair

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Cancer Biology & Medicine 2023年第9期20卷 627-632页

作者： Jia Chen Jie Shi Jian Zheng yunlong wang Xiangbo Wan Henan Provincial Key Laboratory of Radiation Medicine The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052China Academy of Medical Sciences Zhengzhou UniversityZhengzhou 450052China Department of Radiation Oncology The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052China Department of Radiation Oncology The Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhou 510655China Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases The Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhou 510655China

DNA repair factors function through spatiotemporal condensation and dissolution at DNA double-strand breaks(DSBs).Recent advances have indicated that some DSB repair factors undergo liquid-liquid phase separation(LLPS)and show droplet-like properties,as well as dynamic material exchange.Importantly,LLPS regulates various biological processes,and aberrant LLPS is involved in the pathologic progression of various diseases.

关键词： separation double liquid

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Pressure-induced ferroelectric and anti-ferroelectric phase transitions in LaN

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Science China(Physics,Mechanics & Astronomy) 2023年第2期66卷 122-130页

作者： Chi Ding Jianan Yuan Beatriz H.Cogollo-Olivo yunlong wang Xiaomeng wang Jian Sun National Laboratory of Solid State Microstructures School of Physics and Collaborative Innovation Center of Advanced MicrostructuresNanjingUniversityNanjing 210093China Applied Math Institute University of CartagenaCartagena de Indias 130001Colombia

In this work,we focus on the structural and electronic properties of lanthanum mono-nitride s under high pressure.Based on firstprinciples calculations and crystal structure predictions,we identified an anti-ferroelectric orthogonal phase with space group Pbcm.It is predicted to be thermodynamically stable from 20 to 60 GPa,above which the tetragonal phase without the antiferroelectric distortion will substitute it.However,the anti-ferroelectric distortion can be enhancedby reducing the pressure,and a phase transition to a NiAs-type(B8,P63/mmc) structure occurs at about 20 GPa.The calculated double-well potential for La atoms along the c direction in the B8 phase reveals that it should exhibit ferroelectric properties at low temperatures.Enthalpy calculations well confirm their phase transition sequences under high pressure.Electtonic properties calculations suggest that all the newly identified phases are semiconductors and the corresponding structural distortions can increase their bandgaps.When increasing the pressure to 50 GPa,the tetragonal phase undergoes a semiconductor-to-semimetal transition.Taking the spin-orbit coupling into account,the semimetal phase becomes a topological insulator with a small bandgap.Finally,given the similarities between the ionic compounds LaN and BaO,we predict that the most stable phase for BaO at about 25 GPa should also be the anti-ferroelectric orthogonal phase instead of the tetragonal phase.

关键词： ferroelectric phase distortion

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“技术悬浮”:乡村数字治理的实践困境及其应对——基于云南省H县的经验考察

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西北民族大学学报（哲学社会科学版） 2024年第1期 125-137页

作者：王云龙华东师范大学中国现代城市研究中心暨社会发展学院上海200241

数字化建设不仅促成了乡村基础形态的变迁与深度调整,更为推动乡村治理体系和治理能力的变革创造了时代契机。但碍于技术目标、技术配置与技术供给的结构性脱耦,致使信息化工具悬浮于乡村场域之上,并由此导致治理系统出现增量投入与低... 详细信息

数字化建设不仅促成了乡村基础形态的变迁与深度调整,更为推动乡村治理体系和治理能力的变革创造了时代契机。但碍于技术目标、技术配置与技术供给的结构性脱耦,致使信息化工具悬浮于乡村场域之上,并由此导致治理系统出现增量投入与低效运转的循环困境。基于云南省H县的经验考察发现,当地通过治理方式的转型、运营机制的再造以及供给模式的变革,不仅实现了“数字外嵌力量”与“乡村内在基础”的深度融汇,更为整合数字资源、激活治理主体、优化治理格局奠定了坚实的基础。面向未来,需要继续发挥高阶智慧技术的溢出效应,拓展乡域关系网络、整合乡土治理资源,从而实现乡村的良序善治。

关键词：乡村治理数字治理技术悬浮数字转型乡村振兴

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否定性·生成性·排他性:中世纪西欧民族认同阐析

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天津社会科学 2024年第1期 164-173页

作者：王云龙东北师范大学世界中古史研究所

843年查理曼帝国分裂,在否定东部罗马帝国即拜占庭与东部教会即正教的基础上,西欧地域—族群共同体认同潜滋暗长。其一,西欧民族鄙夷(古)罗马(拜占庭),否定帝国,认同自我,民族认同觉醒。其二,历史文本为民族认同进而锻造民族国家提供了... 详细信息

843年查理曼帝国分裂,在否定东部罗马帝国即拜占庭与东部教会即正教的基础上,西欧地域—族群共同体认同潜滋暗长。其一,西欧民族鄙夷(古)罗马(拜占庭),否定帝国,认同自我,民族认同觉醒。其二,历史文本为民族认同进而锻造民族国家提供了历史支撑。中世纪西欧民族认同亦渐次见诸历史文本,历史文本不仅是西欧民族认同生成系谱,更是其民族国家合法性叙事。其三,语言是中世纪西欧民族认同的直观标志。随着查理曼帝国一分为三,民族语言打破了中世纪西欧拉丁语“大一统”的格局。方言天然地具有排他性,通过与他者方言的区隔而自我确认,经过数百年演进为民族语言,基于语言形成了排他性的民族认同。历史发展进程表明,中世纪西欧民族认同具有三个历史性特质:否定性——拒斥帝国形态,生成性——生产自我系谱,排他性——区隔其他族群。民族认同历时性演进为民族主义,进而形成不同社会形态的民族国家。

关键词：民族认同鄙夷罗马(拜占庭) 历史文本民族语言

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从“游走”到“入乡”:数字游民的乡村嵌入与重塑——基于浙江省A县的经验考察

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中国青年研究 2024年第6期 68-77,67页

作者：王云龙华东师范大学中国现代城市研究中心暨社会发展学院

本研究基于实证考察,针对数字游民回嵌乡村的动因、在地实践的过程及其表征结果展开分析。研究表明,数字游民基于时空脱域的工作特质、自由写意的生活方式和闲适质朴的价值理念,脱离城市返回乡村,以获取身心的自由。在从“游走”到“入... 详细信息

本研究基于实证考察,针对数字游民回嵌乡村的动因、在地实践的过程及其表征结果展开分析。研究表明,数字游民基于时空脱域的工作特质、自由写意的生活方式和闲适质朴的价值理念,脱离城市返回乡村,以获取身心的自由。在从“游走”到“入乡”的转变中,数字游民主动将个体价值的实现与乡土发展愿景相绑定,并通过主体、技术与关系三重嵌入机制成为推动乡村建设的地方性力量。同时,数字游民的嵌入实践也激发着乡村文化图景、治理效能、产业资源的重塑与再造,为乡村振兴带来了全新的呈现方式和创新路径。

关键词：数字游民离城返乡乡村嵌入空间重塑

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A stage-specific cell-manipulation platform for inducing endothelialization on demand

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National Science Review 2020年第3期7卷 629-643页

作者： Qilong Zhao Juan wang yunlong wang Huanqing Cui Xuemin Du Institute of Biomedical& Health Engineering Shenzhen Institutes of Advanced TechnologyChinese Academy of Sciences

Endothelialization is of great significance for vascular remodeling, as well as for the success of implanted vascular grafts/stents in cardiovascular disease treatment. However, desirable endothelialization on synthetic biomaterials remains greatly challenging owing to extreme difficulty in offering dynamic guidance on endothelial cell(EC) functions resembling the native extracellular matrix-mediated effects. Here, we demonstrate a bilayer platform with near-infrared-triggered transformable topographies, which can alter the geometries and functions of human ECs by tunable topographical cues in a remote-controlled manner, yet cause no damage to the cell viability. The migration and the adhesion/spreading of human ECs are respectively promoted by the temporary anisotropic and permanent isotropic topographies of the platform in turn, which appropriately meet the requirements of stage-specific EC manipulation for endothelialization. In addition to the potential of promoting the development of a new generation of vascular grafts/stents enabling rapid endothelialization, this stage-specific cell-manipulation platform also holds promise in various biomedical fields, since the needs for stepwise control over different cell functions are common in wound healing and various tissue-regeneration processes.

关键词： biomaterials tissue engineering shape-memory polymer topographical conversion endothelialization

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