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Upper bound of the third edge-connectivity of graphs

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Science China Mathematics 2005年第3期48卷 360-371页

作者： wang yingqian LI Qiao Department of Mathematics Zhejiang Normal University Jinhua 321004 China Department of Applied Mathematics Shanghai Jiaotong University Shanghai 200030 China

Let G be a simple connected graph of order n ≥ 6. The third edge-connectivity of G is defined as the minimum cardinality over all the sets of edges, if any, whose deletion disconnects G and every component of the resulting graph has at least 3 vertices. In this paper, we first characterize those graphs whose third-edge connectivity is well defined,then establish the tight upper bound for the third edge-connectivity.

关键词： third edge-connectivity, upper bound.

On 3-choosability of triangle-free plane graphs

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Science China Mathematics 2011年第6期54卷 1287-1298页

作者： wang yingqian ZHANG QiJun Department of Mathematics Zhejiang Normal University Jinhua 321004 China

It is known that every triangle-free plane graph is ***,such a triangle-free plane graph may not be *** this paper,we prove that a triangle-free plane graph is 3-choosable if no 4-cycle in it is adjacent to a 4-or a *... 详细信息

关键词： plane graph triangle cycle coloring choosability

Total colorings of planar graphs with maximum degree at least 8

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Science China Mathematics 2009年第8期52卷 1733-1742页

作者： SHEN Lan wang yingqian College of Mathematics Physics and Information EngineeringZhejiang Normal UniversityJinhua 321004China

Planar graphs with maximum degree Δ 8 and without 5- or 6-cycles with chords are proved to be (Δ + 1)-totally-colorable.

关键词： planar graph total coloring maximum degree cycle chord 05C15 68R10

Recent progress in background-free latent fingerprint imaging

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Nano Research 2018年第10期11卷 5499-5518页

作者： yingqian wang Jie wang Qinqin Ma Zhihao Li Quan Yuan Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education) College of Chemistry and MolecularSciences Wuhan University Wuhan 430072 China

Owing to their unique pattern and abundant chemical composition, latent fingerprints （LFPs） can serve as ＂ID cards＂ and ＂information banks＂ of donors and therefore are valuable for forensic investigation, access control, and even medical diagnosis. LFP imaging has attracted considerable attention, and a great variety of contrast agents has been developed. In LFP imaging, background signals such as background fluorescence from the underlying surface can seriously blur the LFP images and decrease imaging sensitivity; thus, great efforts have been made to eliminate background interference. Here, we stratify the recent progress in background-free LFP imaging by making use of the difference in properties between contrast agents and background compounds. For example, near-infrared （NIR） light-activatable contrast agents can efficiently remove background signals in LFP imaging because the background compounds cannot be excited by NIR light, showing that the difference in excitation properties between contrast agents and background compounds can be employed to eliminate background interference. This review is organized around background-free LFP imaging based on the difference in optical properties between contrast agents and background compounds：（i） different excitation wavelengths, （ii） different emission wavelengths, （iii） different luminescence lifetime values, （iv） different plasmonic properties, （v） different photothermal properties, and （vi） different electrochemiluminescence properties.

关键词： latent fingerprints background interference upconversion persistent luminescence nanoparticles

Background-free latent fingerprint imaging based on nanocrystals with long-lived luminescence and pH-guided recognition

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Nano Research 2018年第12期11卷 6167-6176页

作者： Zhiheng Li Qian wang yingqian wang Qinqin Ma Jie wang Zhihao Li Yingxue Li Xiaobo Lv Wei Wei Lang Chen Quan Yuan Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education) College of Chemistry and Molecular SciencesWuhan UniversityWuhan 430072China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy ofSciencesBeijing 10090China School of Basic Medical Sciences Wuhan UniversityWuhan 430072China

Latent fingerprints (LFPs) are highly specific to individuals, and LFP imaging has played an important role in areas such as forensic investigation and law enforcement. Presently, LFP imaging still faces considerable problems, including background interference and destructive and complex operations. Herein, we have designed a background-free, nondestructive, and easy-to-perform method for LFP imaging based on pH-mediated recognition of LFPs by carboxyl group-functionalized Zn2GeO4:Mn (ZGO:Mn-COOH) persistent luminescence nanorods (PLNRs). By simply adjusting the pH of the ZGO:Mn-COOH colloid dispersion to a certain acidic range, the negatively charged ZGO:Mn-COOH readily binds to protonated fingerprint ridges via electrostatic attraction. The ZGO:Mn-COOH colloid dispersion can be stored in portable commercial spray bottles, and the LFPs have been easily detected in situ by simply dropping the colloid dispersion on the LFPs. Moreover, since the ZGO:Mn-COOH can remain luminescent after excitation ceases, background color and background fluorescence interference were efficiently removed by simply capturing the luminescent LFP images after the excitation ceased. The entire LFP imaging process can be easily conducted without any destructive or complex operations. Due to the great versatility of the developed method for LFP imaging, clear LFP images with well-resolved ridge patterns were obtained. The designed background-free, nondestructive, and easy-to-perform LFP imaging strategy has great potential for future applications, such as forensic investigations and law enforcement.

关键词： fingerprint persistent luminescence background interference nanoparticle imaging

Wind tunnel experimental study on droplet drift reduction by a conical electrostatic nozzle for pesticide spraying

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International Journal of Agricultural and Biological Engineering 2017年第3期10卷 87-94页

作者： Zhang Wei Hou Yongrui Liu Xin Lian Qi Fu Xiaoming Zhang Bo wang Haiyang wang yingqian College of Information Technology Heilongjiang Bayi Agricultural UniversityDaqing 163319China College of Engineering Heilongjiang Bayi Agricultural UniversityDaqing 163319China

Droplet drift wastes pesticide,pollutes the environment,and has become one of the focus issues of agricultural crop *** spray technology reduces drift to a certain *** order to investigate the droplet drift pattern of a conical electrostatic nozzle,the droplet drift mass center distance was defined as an experimental index and used to conduct experimental wind tunnel studies on droplet drift.A mathematical model of the droplet drift mass center distance versus electrostatic voltage and wind speed was created via the regression *** test results showed that the electrostatic voltage had an insignificant effect on droplet drift,the wind speed and its interaction with the electrostatic voltage had significant effects on droplet *** the wind speed was less than 3 m/s and stable,the crop adsorbability of a droplet had a dominant effect on the droplet drift;the droplet drift decreased with the increase of electrostatic *** the wind speed exceeded 3 m/s and was stable,the reduced droplet particle size had a dominant effect on droplet drift,where droplet drift increased as the electrostatic voltage *** the wind speed was 0 m/s and the electrostatic voltage was 12 kV,the minimum droplet drift mass center distance was 35.5 mm,which was 56 mm less than that of conventional nozzle droplet ***,a conical electrostatic nozzle is inapplicable for operation in an environment where wind speeds exceed 3 m/*** study provides a reference for optimizing operational parameters of conical electrostatic nozzles and improving the anti-drift capability of droplets.

关键词： pesticide spraying conical electrostatic nozzle droplet drift wind tunnel experimental study electrostatic sprayer

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双目图像超分辨研究综述

激光与光电子学进展 2021年第18期58卷 297-311页

作者：王应谦王龙光梁政宇安玮杨俊刚国防科技大学电子科学学院湖南长沙410073

随着双目成像技术的发展,双目图像超分辨在近年来得到了广泛关注。不同于单幅图像超分辨,双目图像超分辨可以利用左右视角图像间的互补信息进一步提升图像重建质量。对双目图像超分辨领域的最新进展进行了综述。首先,介绍了双目成像的... 详细信息

随着双目成像技术的发展,双目图像超分辨在近年来得到了广泛关注。不同于单幅图像超分辨,双目图像超分辨可以利用左右视角图像间的互补信息进一步提升图像重建质量。对双目图像超分辨领域的最新进展进行了综述。首先,介绍了双目成像的基本理论。接着,对现有的双目图像超分辨算法和双目图像数据集进行归纳总结。随后,在基准数据集上对几种基于深度学习的主流算法的性能进行了评测,并探究了不同训练集对超分辨算法性能的影响。最后,总结了双目图像超分辨所面临的挑战,并展望了其未来的研究方向。

关键词：成像系统图像超分辨双目视觉性能评测数据集

Artesunate Induces Ferroptosis in Hepatic Stellate Cells and Alleviates Liver Fibrosis via the ROCK1/ATF3 Axis

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Journal of Clinical and Translational Hepatology 2024年第1期12卷 36-51页

作者： yingqian wang Yujia Li Yangling Qiu Min Shen Ling wang Jiangjuan Shao Feng Zhang Xuefen Xu Zili Zhang Mei Guo Shizhong Zheng Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica Nanjing University of Chinese MedicineNanjingJiangsuChina Institute of Translational Medicine Medical CollegeYangzhou UniversityYangzhouJiangsuChina Jiangsu Key Laboratory of Therapeutic Material of Chinese Medicine Nanjing University of Chinese MedicineNanjingJiangsu China

Background and Aims:Development of fibrosis in chronic liver disease requires activation of hepatic stellate cells(HSCs)and leads to a poor ***(Art)is an ester derivative of artemisinin that can induce ferroptosis in HSCs,and activated transcriptional factor 3(ATF3)is an ATF/CREB transcription factor that is induced in response to *** this study,we examined the role of the Rho-associated protein kinase 1(ROCK1)/ATF3 axis in Art-induced ferroptosis in ***:HSC activation and ferroptosis were studied in vitro by western blotting,polymerase chain reaction,immunofluorescence,and other ***3 electrophoretic mobility and ROCK1 protein stability were assayed by western *** was used to detect the interaction of ROCK1 and ATF3,as well as ATF3 phosphorylation.A ubiquitination assay was used to verify ROCK1 ***3-interfering and Rock1-overexpressing mice were constructed to validate the anti-hepatic fibrosis activity of Art in ***:Art induced ferroptosis in HSCs following glutathione-dependent antioxidant system inactivation resulting from nuclear accumulation of unphosphorylated ATF3 mediated by ROCK1-ubiquitination in *** also decreased carbon tetrachloride-induced liver fibrosis in mice,which was reversed by interfering with Atf3 or overexpressing ***:The ROCK1/ATF3 axis was involved in liver fibrosis and regulation of ferroptosis,which provides an experimental basis for further study of Art for the treatment of liver fibrosis.

关键词： Ferroptosis Liver fibrosis Antioxidant system ATF3 ROCK1

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互动电影的观众多重表达

当代电影 2023年第10期 48-53页

作者：王颖倩北京大学艺术学院

互动电影的观众通过积极参与叙事、改变作品样态、最终成功将自我“嵌入”作品,同时将自己的感知、情感和判断“上载”到作品并经由作品表达出来。其主要价值是将意义表达从作者扩展到观众,让观众成为新的表达主体。观众主体被分化成作... 详细信息

互动电影的观众通过积极参与叙事、改变作品样态、最终成功将自我“嵌入”作品,同时将自己的感知、情感和判断“上载”到作品并经由作品表达出来。其主要价值是将意义表达从作者扩展到观众,让观众成为新的表达主体。观众主体被分化成作者、表演者和观者等多重身份,打破了原本的整一状态,具有纵深维度;以多重分身形式实现功能/身份、身份/认同之间的转换,传达出观众的自我控制欲、表现欲和认知欲,最终以整体印象向自我或他者呈现。

关键词：互动电影互动剧观众自我表达