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Mahalanobis distance-based fading cubature Kalman filter with augmented mechanism for hypersonic vehicle INS/CNS autonomous integration

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Chinese Journal of Aeronautics 2022年第5期35卷 114-128页

作者： Bingbing GAO wenmin li Gaoge HU Yongmin ZHONG Xinhe ZHU School of Automation Northwestern Polytechnical UniversityXi’an 710072China School of Engineering RMIT UniversityBundooraVIC 3083Australia

Inertial Navigation System/Celestial Navigation System(INS/CNS)integration,especially for the tightly-coupled mode,provides a promising autonomous tactics for Hypersonic Vehicle(HV)in military ***,INS/CNS integration is a challenging research task due to its special characteristics such as strong nonlinearity,non-additive noise and dynamic *** paper presents a novel nonlinear filtering method for INS/CNS integration by adopting the emerging Cubature Kalman Filter(CKF)to handle the strong INS error model nonlinearity caused by HV's high *** combines the state-augmentation technique into the nonlinear CKF to decrease the negative effect of non-additive noise in inertial ***,a technique for the detection of dynamic model uncertainty is developed,and the augmented CKF is modified with fading memory to tackle dynamic model uncertainty by rigorously deriving the fading factor via the theory of Mahalanobis distance without artificial *** results and comparison analysis prove that the proposed method can effectively curb the adverse impacts of non-additive noise and dynamic model uncertainty for inertial measurements,leading to improved performance for HV navigation with tightly-coupled INS/CNS integration.

关键词： Autonomous integration Fading factor Hypersonic vehicle Inertial navigation systems Kalman filters Mahalanobis distance

An anonymous and efficient remote biometrics user authentication scheme in a multi server environment

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Frontiers of Computer Science 2015年第1期9卷 142-156页

作者： Peng JIANG Qiaoyan WEN wenmin li Zhengping JIN Hua ZHANG State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China

As service demands rise and expand single-server user authentication has become unable to satisfy actual application demand. At the same time identity and password based authentication schemes are no longer adequate because of the insecurity of user identity and password. As a result biometric user authentication has emerged as a more reliable and attractive method. However, existing biometric authentication schemes are vulnerable to some common attacks and provide no security proof, some of these biometric schemes are also either inefficient or lack sufficient concern for privacy. In this paper, we propose an anonymous and efficient remote biometric user authentication scheme for a multi-server architecture with provable security. Through theoretical mathematic deduction, simulation implementation, and comparison with related work, we demonstrate that our approach can remove the aforementioned weaknesses and is well suited for a multi- server environment.

关键词： biometrics remote authentication multi-server architecture smart card

liveness detection of occluded face based on dual-modality convolutional neural network

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The Journal of China Universities of Posts and Telecommunications 2021年第4期28卷 1-12页

作者： Ming Yue li wenmin Xu Siya Gao lifang Zhang Hua Shao Sujie Yang Huifeng State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China State Grid Hebei Information and Telecommunication Branch Shijiazhuang 050013China

Facial recognition has become the most common identity authentication technologies. However, problems such as uneven light and occluded faces have increased the hardness of liveness detection. Nevertheless, there are a few pieces of research on face liveness detection under occlusion conditions. This paper designs a face recognition technique suitable for different degrees of facial occlusion, which employs the facial datasets of near-infrared(NIR) images and visible(VIS) light images to examine the single-modality detection accuracy rate(experimental control group) and the corresponding high-dimensional features through the residual network(ResNet). Based on the idea of data fusion, we propose two feature fusion methods. The two methods extract and fuse the data of one and two convolutional layers from two single-modality detectors respectively. The fusion of high-dimensional features apply a new ResNet to get the dual-modality detection accuracy. And then, a new ResNet is applied to test the accuracy of dual-modality detection. The experimental results show that the dual-modality face liveness detection model improves face live detection accuracy and robustness compared with the single-modality. The fusion of two-layer features from the single-modality detector can also improve face detection accuracy by utilizing the above-mentioned dual-modality detector, and it doesn’t increase the algorithm’s complexity.

关键词： face deception face occlusion near-infrared image residual network feature fusion

Drought weakens the positive effect of plant diversity on community biomass

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Journal of Plant Ecology 2024年第4期17卷 141-153页

作者： Yanhui Hou Xiaona li Yanxia Hu Xuwei Lu Yue Ma wenmin li Xiran Lü Zimo li Yaxuan Bai Chao Wang Institute of Grassland Flowers and EcologyBeijing Academy of Agriculture and Forestry SciencesBeijing 100097China College of Grassland Science Shanxi Agricultural UniversityJinzhong 030801China College of Landscape Architecture and Art Henan Agricultural UniversityZhengzhou 450002China College of Agriculture and Forestry Hebei North UniversityZhangjiakou 075000China

Drought can greatly impact the biodiversity of an ecosystem and play a crucial role in regulating its ***,the specific mechanisms by which drought mediate the biodiversity effect(BE)on community biomass in above-and belowground through functional traits remain poorly ***,we conducted a common garden experiment in a greenhouse,which included two plant species richness levels and two water addition levels,to analyze the effects of biodiversity on aboveground biomass(AGB),belowground biomass(BGB)and total biomass(TB),and to quantify the relationship between BEs and functional traits under drought *** analysis focused on partitioning BEs into above-and belowground complementarity effect(CE)and selection effect(SE)at the species level,which allowed us to better understand the impacts of biodiversity on community biomass and the underlying *** results showed that plant species richness stimulated AGB,BGB and TB through *** decreased AGB,BGB and TB,*** addition,the aboveground CE was positively associated with the variation in plant *** in above-and belowground were negatively correlated with the community mean plant height and root length,***,drought weakened the aboveground CE by decreasing variation in plant height,resulting in a reduction in AGB and *** findings demonstrate that the complementarity of species is an important regulator of community biomass in above-and belowground,the dynamics of biomass under environmental stress are associated with the response of sensitive compartments.

关键词： biodiversity effect drought plant height root length aboveground biomass belowground biomass

Personality Openness Predicts Driver Trust in Automated Driving

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Automotive Innovation 2020年第1期3卷 3-13页

作者： wenmin li Nailang Yao Yanwei Shi Weiran Nie Yuhai Zhang Xiangrong li Jiawen liang Fang Chen Zaifeng Gao Department of Psychology and Behavioral Sciences Zhejiang UniversityHangzhouChina Huawei Technologies Co. LtdShenzhenChina Chalmers University of Technology GöteborgSweden

Maintaining an appropriate level of trust in automated driving(AD)is critical to safe ***,few studies have explored factors affecting trust in AD in general,and no study,as far as is known,has directly investigated whether driver personality influences driver trust in an AD *** current study investigates the relation between driver personality and driver trust in AD,focusing on Level 2 *** were required to perform a period of AD in a driving simulator,during which their gaze and driving behavior were recorded,as well as their subjective trust scores after *** three distinct measures,a significant correlation between Openness and driver trust in the AD system is found:participants with higher Openness traits tend to have less trust in the AD *** significant correlations between driver trust in AD and other personality traits are *** findings suggest that driver personality has an impact on driver trust in *** and practical implications of this finding are discussed.

关键词： Automated driving Trust Personality Openness

Superconductivity of a cuprate with compressed local octahedron

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Science China(Physics,Mechanics & Astronomy) 2019年第3期62卷 111-113页

作者： wenmin li liPeng Cao JianFa Zhao XianCheng Wang RunZe Yu YouWen Long QingQing liu ChangQing Jin Institute of Physics Chinese Academy of Sciences School of Physics University of Chinese Academy of Sciences Collaborative Innovation Center of Quantum Matter

Since the historical discovery of high Tc superconductivity(HTS)of La2CuO4 in 1986[1],the superconductivity me chanism of copper oxides remains one of the biggest mysteries in the field of condensed matter physics[2-10].High-Tc cuprates crystallize into layered perovskite structure,as well as copper oxygen octahedron *** octahedron symmetry,the 3d orbitals of Cu^2+with a 3d^9 configuration degenerate into two top eg and three lower t2g orbitals.

关键词： Superconductivity cuprate compressed local octahedron

Silt Erosion Characteristics of a Cr_3C_2-NiCr Coating Fabricated by High Velocity Oxy-Fuel (HVOF) Thermal Spray

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稀有金属材料与工程 2012年第S1期41卷 453-455页

作者： Wang Qian,Wu Yuping,li Gaiye,Guo wenmin,He Zhihua,Hong Sheng Hohai University,Nanjing 210098,China Hohai Univ Coll Mech & Mat Nanjing 210098 Jiangsu Peoples R China

A Cr3C2-NiCr coating was prepared by high velocity oxy-fuel(HVOF)thermal spray on 1Cr18Ni9Ti stainless *** and microstructures of the coating were investigated by X-ray diffraction(XRD),optical microscopy(OM)and scanning election microscopy(SEM),*** cavitation erosion resistance and silt erosion resistance of the coating were evaluated using a GB/T6383-2009 standard method in two experimental conditions(fresh water and water contained fine silt),compared with the coatings hydro machine material 1Cr18Ni9Ti stainless *** coating shows a layered structure and has a significantly higher microhardness(11.97 GPa)than that of the 1Cr18Ni9Ti stainless steel(2.1 GPa),which results in less mass losses both in cavitation erosion and silt erosion *** HVOF coating has a predominant performance in the cavitation erosion and silt erosion *** higher microhardness of the coating is the main cause which results in a less mass losses in the erosion *** the mass loss usually happens at the edges of the pores.

关键词： Cr3C2-NiCr coating cavitation erosion silt erosion

Password-Authenticated Multiple Key Exchange Protocol for Mobile Applications

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China Communications 2012年第1期9卷 64-72页

作者： li wenmin Wen Qiaoyan Su Qi Zhang Hua Jin Zhengping State Key Laboratory of Networking and Switching Technology Beijing Uniwrsity of Posts and Telecommunications Beijing100876 P. R. China

To achieve privacy and authentication sinmltaneously in mobile applications, various Three-party Password-authenticated key exchange （3PAKE） protocols have been proposed. However, some of these protocols are vulnerable to conventional attacks or have low efficiency so that they cannot be applied to mobile applications. In this paper, we proposed a password-authenticated multiple key exchange protocol for mobile applications using elliptic curve cryptosystem. The proposed protocol can achieve efficiency, reliability, flexibility and scalability at the same time. Compared with related works, the proposed protocol is more suitable and practical for mobile applications.

关键词： mobile applications key exchange password elliptic curve cryptosystem security

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中国公立医院扩张的逻辑及其治理意涵

中国行政管理 2018年第5期 77-82页

作者：李文敏朱亚鹏中山大学政治与公共事务管理学院中山大学中国公共管理研究中心

2009年以来的新医改虽然在一定程度上缓解了群众"看病难,看病贵"问题,但作为中国医疗服务供给的核心主体,公立医院的扩张问题仍然缺乏有效控制。既有研究主要从发展逻辑和规制逻辑对公立医院扩张提出了解释,但缺乏从历时、综合的视角对... 详细信息

2009年以来的新医改虽然在一定程度上缓解了群众"看病难,看病贵"问题,但作为中国医疗服务供给的核心主体,公立医院的扩张问题仍然缺乏有效控制。既有研究主要从发展逻辑和规制逻辑对公立医院扩张提出了解释,但缺乏从历时、综合的视角对医院扩张行为进行分析,无法充分揭示公立医院为何保持持续的扩张冲动和非理性的扩张方式。本文运用医院间三维竞争理论模型来展示中国公立医院扩张的基本特征和行动逻辑。研究发现,医院间竞争是中国公立医院持续扩张的动力所在。中国转型时期医疗保险政策体系不完善、政府主导的医疗卫生机构管理体制不健全,以及公众医疗卫生知识缺乏是使公立医院在不同维度的竞争脱离价格竞争、效率竞争轨道,走向规模扩张的关键制度诱因。文章最后探讨了公立医院扩张的逻辑及其治理对深化我国行政体制改革和提升国家治理能力的启示和意涵。

关键词：公立医院医院扩张医疗竞争治理