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Severe bleeding after operation of preauricular fistula:A case report

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World Journal of Clinical Cases 2021年第29期9卷 8932-8937页

作者： chun-Hui Tian Xiao-juan Chen Department of Otolaryngology—Head and Neck Surgery Suzhou Hospital of Anhui Medical UniversitySuzhou 235200Anhui ProvinceChina

BACKGROUND Severe eyelid edema and blood accumulation in the submandibular space after preauricular fistula surgery is rarely *** SUMMARY We report a 4-year-old girl with eyelid edema and swelling of the submandibular region after preauricular fistula resection under general *** drug treatment failed,neck computed tomography examination was performed,which confirmed severe bleeding in the submandibular ***,exploration and ligation of the superficial temporal artery were performed under general anesthesia to stop the *** child was successfully treated,and there were no abnormalities over 1 year of *** When severe bleeding occurs after preauricular fistula surgery,superficial temporal artery rupture should be considered as a cause.

关键词： Preauricular lesions Bleeding Infection Excision Surgical treatment Case report

In-situ evaluation for corrosion process at fusion boundary of stainless steel strip overlay joints in H2S containing solution

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中国有色金属学会会刊：英文版 2004年第z1期14卷 413-419页

作者： ZOU Yang PAN chun-xu FU Qiang Department of Physics & Center for Electron Microscopy Wuhan University Wuhan 430063 China Department of Physics & Center for Electron Microscopy Wuhan University Wuhan 430063 China Department of Physics & Center for Nano-Science and Technology Wuhan University Wuhan 430063 China

The present work studied the corrosion properties around the fusion boundaries of 2.25Cr-1Mo steel with stainless steel strip overlay joints under as welded condition and after post-weld heat treatment (PWHT) in H2 S containing solution (NACE TM-01-77 standard) with different time. An in-situ observation method was introduced for evaluating corrosive progress in the fusion boundary in H2 S containing solution, that is, the samples were marked firstly at the boundary and then treated in the solution for variant time. Each time after the corrosion treatment, the observations were kept to focus at the same marked area by using scanning electron microscopy (SEM) to observe the corrosion progress. The results reveal that the fusion boundary is the worst region for corrosion resistance when comparing with other boundaries, and a broad fusion boundary has a stronger resistance for "hydrogen induced disbonding" than a narrow one.

关键词： dissimilar steel welding fusion boundary H2S corrosion post-weld heat treatment

Crystal structure determination of a chimeric FabF by XRD

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Nuclear Science and Techniques 2017年第9期28卷 63-68页

作者： Ke Li Li Li Ye-chun xu College of Science Shanghai University CAS Key Laboratory of Receptor Research Drug Discovery and Design Center Shanghai Institute of Materia MedicaChinese Academy of Sciences (CAS)

Beta-ketoacyl-acyl-carrier-protein synthase Ⅱ,an important enzyme in biosynthesis of bacterial fatty acid,is an attractive target in antibacterial drug design. Platensimycin(PTM), produced by Streptomyces platensis, has a strong, broad-spectrum Gram-positive antibacterial activity by selectively targeting to Fab F but exhibits no inhibition to the Fab F from Streptomyces platensis(spFabF). To study the self-resistance mechanism within the PTM-producing strain and provide hint for development of novel antibiotics, it is imperative to solve the structure of spFabF and elucidate the difference between spFabF and other Fab Fs which are not resistant to PTM. To this end, we constructed four chimeric Fab Fs based on the sequence of spFabF and its homologous protein after the expression of wide-type spFabF was failed. The crystal structure of one chimera, js_(200)FabF, of 91.2% sequence identity to spFabF,was solved. A structure comparison of js_(200)FabF with a PTM-bound Fab F suggested that three loops nearby the catalytic site might play key roles in preventing the binding of PTM to spFabF. The results provide an encouraging basis for further studies on the self-resistance mechanismand structure-based design of novel antibiotics targeting FabFs.

关键词：晶体结构嵌合体 XRD 广谱抗菌活性测定药物设计生产菌株 PTM

Microstructure and tensile properties of A356 alloy with different Sc/Zr additions

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Rare Metals 2021年第9期40卷 2514-2522页

作者： Shou-Peng xu chun-Sheng Shi Nai-Qin Zhao chun-Nian He School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials Tianjin UniversityTianjin 300350China Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072China

Addition of rare earth elements for improving the tensile properties of aluminum alloys has attracted great attention. In this study, a systematic analysis on the microstructure and tensile properties of A356–0.13 Ti alloys with different contents of scandium(Sc) and scandium/zirconium(Sc/Zr) after solution and aging treatment process was carried out. The addition of Sc/Zr into A356–0.13 Ti alloys can greatly refine the grain size and modify the deleterious coarse eutectic Si structure and harmful acicular iron-containing phase morphology. As a result, the maximum value of strength(298 MPa) and ductility(elongation of 8.4%) are acquired by co-addition of Sc/Zr after solution and aging treatment process, which indicates that the tensile properties of A356 alloy are greatly enhanced by the synergistic effect of co-addition of Sc/Zr.

关键词： Aluminum alloys Sc/Zr Tensile properties Solution and aging treatment

Streaming Algorithms for Non-Submodular Maximizationon the Integer Lattice

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Tsinghua Science and Technology 2023年第5期28卷 888-895页

作者： Jingjing Tan Yue Sun Yicheng xu juan Zou School of Mathematics and Information Science Weifang UniversityWeifang 261061China Beijing Institute for Scientific and Engineering Computing Beijing University of TechnologyBeijing 100124China Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 518055China School of Mathematical Sciences Qufu Normal UniversityQufu 273165China

Many practical problems emphasize the importance of not only knowing whether an element is selectedbut also deciding to what extent it is selected,which imposes a challenge on submodule *** this study,we consider the monotone,nondecreasing,and non-submodular maximization on the integer lattice with a *** first design a two-pass streaming algorithm by refining the estimation interval of the optimal *** element,the algorithm not only decides whether to save the element but also gives the number of ***,we introduce the binary search as a subroutine to reduce the time ***,we obtain a one-passstreaming algorithm by dynamically updating the estimation interval of optimal ***,we improve the memorycomplexity of this algorithm.

关键词： integer lattice non-submodular streaming algorithm cardinality constraint

Block dual Toeplitz Operators on the Orthogonal Complements of Fock Spaces

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Acta Mathematica Sinica,English Series 2024年第8期40卷 1967-1988页

作者： Jian Xiang DONG chun xu xu Yu Feng LU School of Mathematical Sciences Dalian University of TechnologyDalian 116024P.R.China School of Mathematics and Information Science Guangzhou UniversityGuangzhou 510006P.R.China

In this paper,we characterize the boundedness and compactness of the block dual Toeplitz operators acting on the orthogonal complement of the Fock spaces,and the compactness of the finite sum of two dual Toeplitz oper... 详细信息

关键词： Block dual Toeplitz operators boundedness compactness Fock space (semi)-commutator

Higher-order temporal interactions promote the cooperation in the multiplayer snowdrift game

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Science China(Information Sciences) 2023年第12期66卷 138-153页

作者： Yan xu juan WANG Chengyi XIA Zhen WANG School of Computer Science and Engineering Tianjin University of Technology School of Electrical Engineering and Automation Tianjin University of Technology School of Artificial Intelligence Tiangong University School of Cyberspace and Center for OPTical IMagery Analysis and Learning(OPTIMAL) Northwestern Polytechnical University

To explore evolutionary dynamics of collective behaviors within the interconnected population,previous studies usually map non-pairwise interactions to higher-order static networks. However, from human communications to chemical reactions and biological systems, interactions often change over time, which cannot be simply described by higher-order static networks. In this study, we introduce time effects into higher-order networks and correspondingly investigate the evolutionary dynamics of multiplayer snowdrift games on higher-order temporal networks. Specifically, extensive simulations from four empirical datasets reveal that(1) the temporal effect of higher-order networks can facilitate the evolution of cooperation;(2) the higher-order topology can enhance the emergence of cooperation within a certain range of parameters;(3) the contribution of temporal burstiness and participants burstiness to cooperation is reversed. Furthermore,we theoretically demonstrate that the higher-order structure will suppress the propagation of defection in temporal networks. Our findings offer a new avenue for studying the evolution of altruistic behaviors in realistic complex networks.

关键词： collective behaviors non-pairwise interactions multiplayer snowdrift games temporal networks higher-order complex networks

Wavelength-Tunable Rectangular Pulse Dissipative Soliton Operation of an Erbium-Doped Mode-Locked Fiber Laser

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Chinese Physics Letters 2014年第4期31卷 68-71页

作者： HU xue-juan GUO chun-Yu RUAN Shuang-Chen Shenzhen Key Laboratory of Laser Engineering Key Laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes College of Electronic Science and Technology Shenzhen University Shenzhen 518060

The wavelength-tunable rectangular pulse dissipative soliton （DS） is experimentally demonstrated, for the first time to the best of our knowledge, in an erbium-doped figure-of-eight fiber laser based on the nonlinear amplifying loop mirror mode-locked technique. The proposed rectangular pulse DS fiber laser can operate in the wavelength- tunable mode-locked state from 1573.5nm to 159d.6 nm with the rotation of the polarization controllers. The achieved output wavelengths are 1573.5nm, 1576.3nm, 1586.8nm, 1590.4nm and 1594.6nm, respectively. The pulse widths of the rectangular pulse can also be tuned from ~8ns to ~24ns by adjusting the pump power. The fundamental repetition rate of the rectangular pulse DS is 1.154 MHz and the output power is 6.1d m W （at 1594.6 nm）.

关键词： WAVELENGTHS SOLITONS FIBER lasers MODE-locked lasers GAUSSIAN function

A survey of photon mapping state-of-the-art research and future challenges

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Frontiers of Information Technology & Electronic Engineering 2016年第3期17卷 185-199页

作者： chun-meng KANG Lu WANG Yan-ning xu Xiang-xu MENG Department of Computer Science and Technology Shandong University Engineering Research Center of Digital Media Technology Ministry of Education

Global illumination is the core part of photo-realistic rendering. The photon mapping algorithm is an effective method for computing global illumination with its obvious advantage of caustic and color bleeding rendering. It is an active research field that has been developed over the past two decades. The deficiency of precise details and efficient rendering are still the main challenges of photon mapping. This report reviews recent work and classifies it into a set of categories including radiance estimation, photon relaxation, photon tracing, progressive photon mapping, and parallel methods. The goals of our report are giving readers an overall introduction to photon mapping and motivating further research to address the limitations of existing methods.

关键词： Global illumination Photon mapping Radiance estimation Photon relaxation Progressive photon mapping