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MILI:Multi-person inference from a low-resolution image

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Fundamental Research 2023年第3期3卷 434-441页

作者： kun Li yunke liu yu-kun Lai Jingyu Yang Tianjin University Tianjin 300350China CardiffUniversity CardiffCF244AGUnited Kingdom

Existing multi-person reconstruction methods require the human bodies in the input image to occupy a considerable portion of the ***,low-resolution human objects are ubiquitous due to trade-offbetween the field of view and target distance given a limited camera *** this paper,we propose an end-to-end multi-task framework for multi-person inference from a low-resolution image(MILI).To perceive more information from a low-resolution image,we use pair-wise images at high resolution and low resolution for training,and design a restoration network with a simple loss for better feature extraction from the low-resolution *** address the occlusion problem in multi-person scenes,we propose an occlusion-aware mask prediction network to estimate the mask of each person during 3D mesh *** results on both small-scale scenes and large-scale scenes demonstrate that our method outperforms the state-of-the-art methods both quantitatively and *** code is available at http://***/faculty/likun/projects/MILI.

关键词： Multi-person reconstruction Low-resolution human objects End-to-end Multi-task learning Occlusion-aware prediction

Partition region-based suppressed fuzzy C-means algorithm

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Journal of Systems Engineering and Electronics 2017年第5期28卷 996-1008页

作者： kun Zhang Weiren Kong Peipei liu Jiao Shi yu Lei Jie Zou Min liu School of Electronics and Information Northwestern Polytechnical University Science and Technology on Electro-Optic Control Laboratory

Aimed at the problem that the traditional suppressed fuzzy C-means clustering algorithms ignore the real needs of different objects, applying the same suppressed parameter for modifying membership degrees of all the objects, a novel partition region-based suppressed fuzzy C-means clustering algorithm with better capacity of adaptability and robustness is proposed in this paper. The model based on the real needs of different objects is built, making it clear to decide whether to proceed with further determination; in addition, the external user-defined suppressed parameter is automatically selected according to the intrinsic structural characteristic of each dataset, making the proposed method become robust to the fluctuations in the incoming dataset and initial conditions. Experimental results show that the proposed method is more robust than its counterparts and overcomes the weakness of the original suppressed clustering algorithm in most cases.

关键词： shadowed set suppressed fuzzy C-means clustering automatically parameter selection soft computing techniques

The effects of caudal fin deformation on the hydrodynamics of thunniform swimming under self-propulsion

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Journal of Hydrodynamics 2020年第6期32卷 1122-1137页

作者： Yi-kun Feng yu-min Su Huan-xing liu yuan-yuan Su College of Shipbuilding Engineering Harbin Engineering UniversityHarbin150001China Beijing Institute of Specialized Machinery Beijing100081China Science College Harbin Engineering UniversityHarbin150001China

To investigate the effects of the caudal fin deformation on the hydrodynamic performance of the self-propelled thunniform swimming,we perform fluid-body interaction simulations for a tuna-like swimmer with thunniform *** 3-D vortices are visualized to reveal the role of the leading-edge vortex(LEV)in the thrust *** comparing the swimming velocity of the swimmer with different caudal fin flexure amplitudes fa,it is shown that the acceleration in the starting stage of the swimmer increases with the increase of fa,but its cruising velocity *** results indicate that the caudal fin deformation is beneficial to the fast start but not to the fast cruising of the *** the entire swimming process,the undulation amplitudes of the lateral velocity and the yawing angular velocity decrease as fa *** is found that the formation of an attached LEV on the caudal fin is responsible for generating the low-pressure region on the surface of the caudal fin,which contributes to the ***,the caudal fin deformation can delay the LEV shedding from the caudal fin,extending the duration of the low pressure on the caudal fin,which will cause the caudal fin to generate a drag-type force over a time period in one swimming cycle and reduce the cruising speed of the swimmer.

关键词： Computational fluid dynamics(CFD)numerical simulation self-propulsion caudal fin deformation

A Formal Method for Service Choreography Verification Based on Description Logic

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Computers, Materials & Continua 2020年第2期62卷 893-904页

作者： Tingting Zhang yushi Lan Minggang yu Changyou Zheng kun liu PLA Army Engineering University NanjingChina The 28th Research Institute of China Electronics Technology Group Corporation NanjingChina Southeast University NanjingChina

Web Services Choreography Description Language lacks a formal system to accurately express the semantics of service behaviors and verify the correctness of a service choreography *** paper presents a new approach of choreography model verification based on Description Logic.A meta model of service choreography is built to provide a conceptual framework to capture the formal syntax and semantics of service *** on the framework,a set of rules and constraints are defined in Description Logic for choreography model *** automate model verification,the UML-based service choreography model will be transformed,by the given algorithms,into the DL-based ontology,and thus the model properties can be verified by reasoning through the ontology with the help of a popular DL reasoned.A case study is given to demonstrate applicability of the ***,the work will be compared with other related research.

关键词： Service choreography WS-CDL meta-concept model description logic formal verification

Effect of sodium tartrate concentrations on morphology and characteristics of anodic oxide film on titanium alloy Ti–10V–2Fe–3Al

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Chinese Journal of Aeronautics 2016年第4期29卷 1151-1158页

作者： Ma kun yu Mei liu Jianhua Li Songmei Wu Liang Yao Wenhui School of Materials Science and Engineering Beihang University School of Materials Science and Engineering Chongqing University

The effect of sodium tartrate concentrations on morphology and characteristics of anodic oxide film on titanium alloy was investigated. The alloy substrates were anodized in different concentration solutions of sodium tartrate with the addition of PTFE emulsion and their morphology and characteristics were analyzed. The anodic oxide film presented a uniform petaloid drums and micro-cracks morphology. Additionally, micro-cracks dramatically swelled with the increase of the tartrate concentrations. The thickness of the anodic oxide film increased with the concentrations until the concentration reached 15 g/L. The results of Raman analysis illustrate that all samples have similarity in the crystal structure, consisting of mainly amorphous TiO2, some anatase TiO2and a small amount of rutile TiO2. And the ratios of anatase TiO2and rutile TiO2increase with the concentrations until it reaches 15 g/L. Furthermore, the intensity of the peaks increases with enhanced concentrations until the concentration reaches 15 g/L. The corrosion resistance of the anodic oxide film is increased by the sodium tartrate with higher concentrations before 15 g/L. The coefficient of friction of the anodic oxide film reduces with the concentrations until the concentration reaches 15 g/L, then the coefficient of friction of the anodic oxide film increases with the concentrations. © 2015 The Authors

关键词： Concentration (process) Corrosion Corrosion inhibitors Corrosion resistance Cracks Crystal structure Emulsification Friction Morphology Oxide films Oxide minerals Sodium Titanium Titanium alloys Titanium dioxide Titanium oxides Tribology

Electronic structures and properties of pure vanadium

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中国有色金属学会会刊：英文版 1999年第3期9卷 446-450页

作者： He yu(贺昱) Xie Youqing(谢佑卿) Peng kun(彭坤) liu Xinbi(刘心笔) Cent S Univ Technol Dept Mat Sci & Engn Changsha 41083 Peoples R China

By the one atom theory the electronic structure of bcc V has been determined to be [Ar](3d n) 1.799 8 (3d c) 2.657 8 (4S c) 0.171 1 (4s f) 0.371 3 . According to this electronic structure of bcc V, its potential curve, cohesive energy, lattice parameter, elasticity and linear thermal expansion coefficient were calculated. The electronic structures of the primary state crystals of fcc V, hcp V and the primary state liquid—V have also been studied.

关键词： vanadium electronic structure physical properties

Assessment and sequencing of air target threat based on intuitionistic fuzzy entropy and dynamic VIKOR

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Journal of Systems Engineering and Electronics 2018年第2期29卷 305-310页

作者： ZHANG kun KONG Weiren liu Peipei SHI Jiao LEI yu ZOU Jie School of Electronics and Information Northwestern Polytechnical UniversityXi’an 710072China Science and Technology on Electro-Optic Control Laboratory Luoyang 471009China

In view of the fact that traditional air target threat assessment methods are difficult to reflect the combat characteristics of uncertain, dynamic and hybrid formation, an algorithm is proposed to solve the multi-target threat assessment problems. The target attribute weight is calculated by the intuitionistic fuzzy entropy(IFE) algorithm and the time series weight is gained by the Poisson distribution method based on multi-times data. Finally,assessment and sequencing of the air multi-target threat model based on IFE and dynamic Vlse Kriterijumska Optimizacija I Kompromisno Resenje(VIKOR) is established with an example which indicates that the method is reasonable and effective.

关键词： threat assessment intuitionistic fuzzy entropy(IFE) dynamic Vlse Kriterijumska Optimizacija I Kompromisno Resenje(VIKOR) poisson distribution time series weight

ICU内洋葱伯克霍尔德菌感染的高危因素和耐药分析

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实用预防医学 2009年第5期16卷 1544-1546页

作者：彭科张玉坤刘莉王扬苏州大学附属第一医院麻醉科中心ICU 江苏苏州215006

目的研究重症监护病房(ICU)内洋葱伯克霍尔德菌感染的临床、药敏和危险因素。方法对ICU内病例进行回顾性分析,21例洋葱伯克霍尔德菌感染病例作为观察组,22例非洋葱伯克霍尔德菌病例作为对照组,用SPSS10.0软件统计分析其感染的危险因素... 详细信息

目的研究重症监护病房(ICU)内洋葱伯克霍尔德菌感染的临床、药敏和危险因素。方法对ICU内病例进行回顾性分析,21例洋葱伯克霍尔德菌感染病例作为观察组,22例非洋葱伯克霍尔德菌病例作为对照组,用SPSS10.0软件统计分析其感染的危险因素。结果气管插管、气管切开,深静脉置管,使用抗生素≥7d,使用抗生素≥两种是主要的危险因素。洋葱伯克霍尔德菌具有多重耐药性,对头孢哌酮/舒巴坦、环丙沙星、哌拉西林/他唑巴坦敏感性较高,对丁胺卡那、亚胺培南的耐药率超过60%。结论减少侵入性操作和广谱抗生素的长期使用,根据药敏结果选用敏感抗菌药物,以减少洋葱伯克霍尔德菌感染的发生。

关键词：重症监护病房洋葱伯克霍尔德菌高危因素耐药性

N-heterocyclic carbene-catalyzed radical reactions

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Science China Chemistry 2021年第1期64卷 7-16页

作者： kun-Quan Chen He Sheng Qiang liu Pan-Lin Shao Xiang-yu Chen School of Chemical Sciences University of the Chinese Academy of SciencesBeijing 100049China College of Innovation and Entrepreneurship Southern University of Science and TechnologyShenzhen 518055China

While N-heterocyclic carbene(NHC)catalyzed electron-pair-transfer processes have been developed into an important tool for synthetically important bond formations during the past decades,the corresponding radical reactions via NHC catalysis have only received growing attention in the past six *** into account the advantages NHC-catalyzed radical reactions might bring,such as creating new activation modes that were previously unobtainable,it is worthwhile to provide a conceptual understanding of this emerging ***,herein we give an overview of NHC-catalyzed radical reactions via different synthetic techniques.

关键词： N-heterocyclic carbene radical one-electron oxidant photochemistry electrochemistry