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World Journal of Clinical Cases 2025年第4期13卷 41-47页

作者： xing-Po li Zi-Shan Wang Hong-Xia Yu Shan-Shan Wang Department of Cardiovascular Medicine Huantai County Hospital of Traditional Chinese MedicineZibo 256400Shandong ProvinceChina Department of Cardiovascular Medicine Zibo Hospital of Integrated Traditional Chinese and Western MedicineZibo 255500Shandong ProvinceChina

BACKGROUND The incidence of acute myocardial infarction(AMI)is rising,with cardiac rupture accounting for approximately 2%of deaths in patients with acute ST-segment elevation myocardial infarction(STEMI).Ventricular free wall rupture(FWR)occurs in approximately 2%of AMI patients and is notably rare in patients with *** of cardiac rupture include left ventricular FWR,ventricular septal rupture,and papillary muscle *** FWR usually leads to acute cardiac tamponade or electromechanical dissociation,where standard resuscitation efforts may not be *** septal rupture and papillary muscle rupture often result in refractory heart failure,with mortality rates over 50%,even with surgical or percutaneous repair *** SUMMARY We present a rare case of an acute non-STEMI patient who suffered sudden FWR causing cardiac tamponade and loss of consciousness immediate before undergoing coronary *** resuscitation and emergency open-heart repair along with coronary artery bypass grafting resulted in successful patient *** This case emphasizes the risks of AMI complications,shares a successful treatment scenario,and discusses measures to prevent such complications.

关键词： Acute non-ST segment elevation myocardial infarction Cardiac rupture Acute myocardial infarction Free wall rupture Case report

Investigation on Combustion Characteristics and NO Formation of Methane with Swirling and Non-Swirling High Temperature Air

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Journal of Thermal Science 2014年第5期23卷 472-479页

作者： li xing JIA li Institute of Thermal Engineering School of MechanicalElectronic and Control EngineeringBeijing Jiaotong University

Combustion characteristics of methane jet flames in an industrial burner working in high temperature combustion regime were investigated experimentally and numerically to clarify the effects of swirling high temperature air on ***-Sarkar-Gatski(SSG) Reynolds stress model,Eddy-Dissipation Model(EDM),Discrete Ordinates Method(DTM) combined with Weighted-Sum-of-Grey Gases Model(WSGG) were employed for the numerical *** Thermal-NO and Prompt-NO mechanism were considered to evaluate the NO *** distribution,NO emissions by experiment and computation in swirling and non-swirling patterns show combustion characteristics of methane jet flames are totally ***-swirling high temperature air made high NO formation while significant NO prohibition were achieved by swirling high temperature ***,velocity fields,dimensionless major species mole fraction distributions and Thermal-NO molar reaction rate profiles by computation interpret an inner exhaust gas recirculation formed in the combustion zone in swirling case.

关键词： swirling non-swirling high temperature air combustion methane NO experiment numerical simulation

A novel 2D graphene oxide modified α-AgVO_(3) nanorods: Design, fabrication, and enhanced visible-light photocatalytic performance

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Journal of Advanced Ceramics 2022年第2期11卷 308-320页

作者： Jian WU liangyu li xing-ao li Xin MIN Yan xing New Energy Technology Engineering Lab of Jiangsu Province School of ScienceNanjing University of Posts&Telecommunications(NUPT)Nanjing 210023China Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of Geosciences(Beijing)Beijing 100083China

Silver vanadates are promising visible-light-responded photocatalysts with suitable bandgap for solar ***,the easy recombination of photogenerated carriers limits their *** overcome this obstacle,a novel 2D graphene oxide(GO)modifiedα-AgVO_(3) nanorods(GO/α-AgVO_(3) )photocatalyst was designed herein to improve the separation of *** GO/α-AgVO_(3) was fabricated through a facile in-situ coprecipitation method at room *** was found that the as-prepared 0.5 wt%GO/α-AgVO_(3) exhibited the most excellent performance for rhodamine B(RhB)decomposition,with an apparent reaction rate constant 18 times higher than that of pureα-AgVO_(3) under visible-light *** light of the first-principles calculations and the hetero junction analysis,the mechanism underpinned the enhanced photocatalytic performance was *** enhanced photocatalytic performance was ascribed to the appropriate bandgap ofα-AgVO_(3) nanorods for visible-light response and efficient separation of photocarriers through GO *** work demonstrates the feasibility of overcoming the easy recombination of photogenerated carriers and provides a valuable GO/α-AgVO_(3) photocatalyst for pollutant degradation.

关键词： α-AgVO_(3) graphene oxide modifiedα-AgVO_(3)nanorods(GO/α-AgVO_(3)) photocatalysis graphene oxide(GO)nanosheets in-situ coprecipitation processing

A novel noise reduction technique for underwater acoustic signals based on complete ensemble empirical mode decomposition with adaptive noise,minimum mean square variance criterion and least mean square adaptive filter

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Defence Technology（防务技术） 2020年第3期16卷 543-554页

作者： Yu-xing li Long Wang Faculty of Information Technology and Equipment Engineering Xi'an University of TechnologyXi'an 710048ShaanxiChina School of Marine Science and Technology Northwestern Polytechnical UniversityXi'an 710072ShaanxiChina

Underwater acoustic signal processing is one of the research hotspots in underwater *** reduction of underwater acoustic signals is the key to underwater acoustic signal *** to the complexity of marine environment and the particularity of underwater acoustic channel,noise reduction of underwater acoustic signals has always been a difficult challenge in the field of underwater acoustic signal *** order to solve the dilemma,we proposed a novel noise reduction technique for underwater acoustic signals based on complete ensemble empirical mode decomposition with adaptive noise(CEEMDAN),minimum mean square variance criterion(MMSVC) and least mean square adaptive filter(LMSAF).This noise reduction technique,named CEEMDAN-MMSVC-LMSAF,has three main advantages:(i) as an improved algorithm of empirical mode decomposition(EMD) and ensemble EMD(EEMD),CEEMDAN can better suppress mode mixing,and can avoid selecting the number of decomposition in variational mode decomposition(VMD);(ii) MMSVC can identify noisy intrinsic mode function(IMF),and can avoid selecting thresholds of different permutation entropies;(iii) for noise reduction of noisy IMFs,LMSAF overcomes the selection of deco mposition number and basis function for wavelet noise ***,CEEMDAN decomposes the original signal into IMFs,which can be divided into noisy IMFs and real ***,MMSVC and LMSAF are used to detect identify noisy IMFs and remove noise components from noisy ***,both denoised noisy IMFs and real IMFs are reconstructed and the final denoised signal is *** with other noise reduction techniques,the validity of CEEMDAN-MMSVC-LMSAF can be proved by the analysis of simulation signals and real underwater acoustic signals,which has the better noise reduction effect and has practical application ***-MMSVC-LMSAF also provides a reliable basis for the detection,feature extraction,classification and recognition of underwater acousti

关键词： Underwater acoustic signal Noise reduction Empirical mode decomposition(EMD) Ensemble EMD(EEMD) Complete EEMD with adaptive noise(CEEMDAN) Minimum mean square variance criterion(MMSVC) Least mean square adaptive filter(LMSAF) Ship-radiated noise

Low temperature synthesis of high-entropy(Y_(0.2)Yb_(0.2)Sm_(0.2)Eu_(0.2)Er_(0.2))_(2)O_(3)nanofibers by a novel electrospinning method

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Journal of Materials Science & Technology 2022年第8期103卷 215-220页

作者： Yan xing Wenqing Dan Yicun Fan xing’ao li New Energy Technology Engineering Lab of Jiangsu Province School of ScienceNanjing University of Posts&Telecommunications(NUPT)Nanjing 210023China

High-entropy ceramics(HECs)show outstanding properties such as amorphous-like thermal conductivities,colossal dielectric constant,superionic conductivity,enhanced electromagnetic wave absorption ability,super hardness and strength,which are promising for structural and functional ***,the high synthesis temperature has become the bottleneck that hinders the scale-up production and practical applications of *** is thus appealing to develop a novel low-temperature process for the synthesis of *** demonstrate the feasibility of low-temperature synthesis,herein,an electrospinning method has been utilized,for the first time,for the synthesis of high-entropy(Y_(0.2)Yb_(0.2)Sm_(0.2)Eu_(0.2)Er_(0.2))_(2)O_(3)*** has been found that after electrospinning from liquid precursors single phase(Y_(0.2)Yb_(0.2)Sm_(0.2)Eu_(0.2)Er_(0.2))_(2)O_(3) solid solution with bixbyite structure can be formed by calcining at a temperature as low as 500℃,which is at least about 1000℃ lower than that used in the solid-state synthesis *** as-prepared(Y_(0.2)Yb_(0.2)Sm_(0.2)Eu_(0.2)Er_(0.2))_(2)O_(3) nanofibers are continuous and uniform with a smooth surface and a small diameter of 150 *** is also intriguing that the average grain size of(Y_(0.2)Yb_(0.2)Sm_(0.2)Eu_(0.2)Er_(0.2))_(2)O_(3) is only about 10 nm,which is much smaller than that in the solid-state synthesized *** addition,all the elements are homogeneously distributed along the *** work demonstrates that high-entropy ceramic nanofibers can be synthesized from liquid precursors at low temperatures through a simple,efficient,and low-cost electrospinning method,which opens up a new avenue for the low-temperature synthesis of HECs.

关键词： High-entropy ceramics Nanofibers Electrospinning Rare earth metal oxides Synthesis

Wiener Index, Hyper-Wiener Index, Harary Index and Hamiltonicity Properties of graphs

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Applied Mathematics(A Journal of Chinese Universities) 2019年第2期34卷 162-172页

作者： YU Gui-dong REN li-fang li xing-xing School of Mathmatics and Computation Sciences Anqing Normal UniversityAnqing 246133China Basic Department Hefei Preschool Education CollegeHefei 230013China

In this paper, in terms of Wiener index, hyper-Wiener index and Harary index, we first give some sufficient conditions for a nearly balance bipartite graph with given minimum degree to be traceable. Secondly, we estab... 详细信息

关键词： Wiener index Hyper-Wiener index Harary index Traceable Hamilton-connected Traceable for every vertex

A Note on Parameter Estimations of Panel Vector Autoregressive Models with Intercorrelation

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Acta Mathematicae Applicatae Sinica 2009年第2期25卷 177-182页

作者： Jian-hong Wu li-xing Zhu Zai-xing li College of Statistics and Mathematics Zhejiang Gongshang University Hangzhou 310018 China Department of Mathematics Hong Kong Baptist University Hong Kong China Department of Statistics East China Normal University Shanghai 200062 China Department of Mathematics China University of Mining and Technology Beijing 100083 China

This note considers parameter estimation for panel vector autoregressive models with intercorrelation. Conditional least squares estimators are derived and the asymptotic normality is established. A simulation is carr... 详细信息

关键词： Estimation intercorrelation panel Vector autoregression time series

A general two-phase mixture model for sediment-laden flow in open channel

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Journal of Hydrodynamics 2022年第2期34卷 286-298页

作者： Jia-xing li Xin Chen Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System China Agricultural UniversityBeijing100083China

This work extends the sediment-laden mixture model with consideration of the turbulence damping and particle wake effects under the framework of improved efficiency and *** mixture model consists of the continuity and momentum equations for the sediment-laden mixture,and the continuity equation for the sediment.A theoretical formula is derived for the relative velocity between the water and sediment phases,with consideration of the effects of the pressure gradient,the shear stress and the lift force.A modified expression of the particle wake effect,inducing the local turbulence enhancement around the sediment particle,is employed to improve the turbulent diffusion of the coarse *** k_(m)-ε_(m) model is proposed to close the mixture turbulence,with the turbulence damping effect due to the high sediment concentration expressed by the density-stratification term without an empirical *** k_(m)-ε_(m) turbulence model requires smaller computational work and offers better results than an empirical density-stratification turbulence model in high sediment concentration ***,with the proposed mixture model,the sediment transport in the open channel under a wide range of sediment sizes and concentrations can be revealed with the results in good agreement with experimental data for the velocity,the sediment concentration and the turbulent kinetic energy.

关键词： Sediment-laden flow two-phase mixture model particle wake effect turbulence damping effect density stratification

An overview of particle-based numerical manifold method and its application to dynamic rock fracturing

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Journal of Rock Mechanics and Geotechnical Engineering 2019年第3期11卷 684-700页

作者： xing li Jian Zhao School of Civil Engineering Southeast UniversityNanjing211189China Department of Civil Engineering Monash UniversityClaytonVIC3800Australia

This review summarizes the development of particle-based numerical manifold method(PNMM)and its applications to rock *** fundamental principle of numerical manifold method(NMM)is first briefly ***,the history of the newly developed PNMM is *** idea of PNMM and its simulation procedure are *** that PNMM could be regarded as an NMM-based model,a comparison of PNMM and NMM is discussed from several points of view in this ***,accomplished applications of PNMM to the dynamic rock fracturing are also ***,some recommendations are provided for the future work of PNMM.

关键词： Dynamic rock fracturing Numerical modeling Numerical manifold method(NMM) Particle-based numerical manifold method(PNMM)

Zero Dissipation limit to Rarefaction Waves for the 1-D Compressible Navier-Stokes Equations

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Chinese Annals of Mathematics,Series B 2012年第3期33卷 385-394页

作者： Feimin HUANG xing li Academy of Mathematics and System Sciences Chinese Academy of SciencesBeijing 100190China

The zero dissipation limit for the one-dimensional Navier-Stokes equations of compressible,isentropic gases in the case that the corresponding Euler equations have rarefaction wave solutions is investigated in this *** a paper(*** ***.,46,1993,621-665) by ***,the author constructed a sequence of solutions to one-dimensional Navier-Stokes isentropic equations converging to the rarefaction wave as the viscosity tends to ***,he obtained that the convergence rate is ε 1/4 | ln ε|.In this paper,Xin's convergence rate is improved to ε1/3|lnε|2 by different scaling *** new scaling has various applications in related problems.

关键词： Compressible Navier-Stokes equations Rarefaction wave CompressibleEuler equations