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Relationship between longitudinal changes in lipid composition and ischemic stroke among hypertensive patients

World Journal of Clinical Cases 2025年第4期13卷 18-27页

作者： cheng-cheng wei Yu-Qing Huang cheng-Hong Yu Department of Cardiology Tongxiang First People's HospitalTongxiang 314500Zhejiang ProvinceChina Department of Cardiology Guangdong Cardiovascular InstituteGuangzhou 510080Guangdong ProvinceChina

BACKGROUND Dyslipidemia was strongly linked to stroke,however the relationship between dyslipidemia and its components and ischemic stroke remained *** To investigate the link between longitudinal changes in lipid profiles and dyslipidemia and ischemic stroke in a hypertensive *** Between 2013 and 2014,6094 hypertension individuals were included in this,and ischemic stroke cases were documented to the end of *** changes of lipid were stratified into four groups:(1)Normal was transformed into normal group;(2)Abnormal was transformed into normal group;(3)Normal was transformed into abnormal group;and(4)Abnormal was transformed into abnormal *** examine the link between longitudinal changes in dyslipidemia along with its components and the risk of ischemic stroke,we utilized multivariate Cox proportional hazards models with hazard ratio(HR)and 95%*** The average age of the participants was 62.32 years±13.00 years,with 329 women making up 54.0%of the *** the course of a mean follow-up of 4.8 years,143 ischemic strokes *** normal was transformed into normal group was used as a reference,after full adjustments,the HR for dyslipidemia and ischemic stroke among abnormal was transformed into normal group,normal was transformed into abnormal group and abnormal was transformed into abnormal wei CC et *** changed and ischemic stroke WJCC https://*** 2 February 6,2025 Volume 13 Issue 4 group were 1.089(95%CI:0.598-1.982;P=0.779),2.369(95%CI:1.424-3.941;P<0.001)and 1.448(95%CI:1.002-2.298;P=0.047)(P for trend was 0.233),*** In individuals with hypertension,longitudinal shifts from normal to abnormal in dyslipidemia-particularly in total and low-density lipoprotein cholesterol-were significantly associated with the risk of ischemic stroke.

关键词： Longitudinal change Hypertension Dyslipidemia Lipid profile Ischemic stroke

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Generalized Maupertuis' Principle with Applications

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Acta Mathematica Sinica,English Series 2012年第11期28卷 2153-2160页

作者： wei cheng Department of Mathematics Nanjing University

We give a rigorous proof of the equivalence of Manes supercritical potential and the minimal action with respect to an associated Jacobi-Finsler metric. As a consequence, we give an explicit representation of the weak KAM solutions of one-dimensional mechanical systems without the quadratic assumption on the kinetic energy term of the Hamiltonians, and a criterion of the integrability result for such a system of arbitrary degree of freedom by the regularity assumption on Mather＇s a- function is discussed.

关键词： Generalized Maupertuis' principle weak KAM solutions a-function

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Peptide hydrogelation triggered by enzymatic induced pH switch

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Science China(Physics,Mechanics & Astronomy) 2016年第7期59卷 76-81页

作者： wei cheng Ying Li Nanjing Stomatological Hospital Medical School of Nanjing University Jiangsu Engineering Technology Research Centre of Environmental Cleaning Materials Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution ControlJiangsu Joint Laboratory of Atmospheric Pollution ControlCollaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and EngineeringNanjing University of Information Science &Technology National Laboratory of Solid State Microstructures Nanjing University

It remains challenging to develop methods that can precisely control the self-assembling kinetics and thermodynamics of peptide hydrogelators to achieve hydrogels with optimal *** we report the hydrogelation of peptide hydrogelators by an enzymatically induced pH switch,which involves the combination of glucose oxidase and catalase with D-glucose as the substrate,in which both the gelation kinetics and thermodynamics can be controlled by the concentrations of *** novel hydrogelation method could result in hydrogels with higher mechanical stability and lower hydrogelation *** further illustrate the application of this hydrogelation method to differentiate different D-glucose levels.

关键词： glucose oxidase and catalase peptide hydrogel pH switch mechanical properties

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Meet-Cloud for Secure and Accurate Distribution of Negative Messages in Vehicular Ad hoc Network

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Tsinghua Science and Technology 2018年第4期23卷 377-388页

作者： Baohua Huang Xiaolu cheng Caixia Huang wei cheng School of Computer and Electronic Information Guangxi University Nanning 530004 China Department of Computer Science Virginia Commonwealth University Richmond VA 23220 USA School of Computer Engineering and Applied Mathematics Changsha University Changsha 410003 China

Keeping Vehicular Ad hoc Network （VANET） from attacks requires secure and efficient distribution of information about bad entitles. Negative messages are pieces of information that define the negative attributes of vehicles. By formally defining the negative message, we observe that accuracy is essential for its efficient distribution. We formally define the coverage percentage and accurate coverage percentage to describe the availability and distribution efficiency of negative message. These two metrics can jointly evaluate the performance of a distribution method. To obtain both high coverage percentage and high accurate coverage percentage, we propose meet-cloud, a scheme based on meet-table and cloud computing to securely and accurately distribute negative messages in VANET. A meet-table in a Road Side Unit （RSU） records the vehicles it encounters. All meet- tables are sent to cloud service to aggregate a global meet-table. The algorithm for distributing and redistributing negative messages are designed. Security analysis shows that meet-cloud is secure against fake and holding on to negative message attacks. Simulations and analysis demonstrate that meet-cloud is secure under denial of service and fake meet-table attacks. The simulation results also justify that meet-cloud outperforms the RSU broadcast and epidemic model.

关键词： negative message accurate coverage percentage meet-table VANET cloud computing

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Adsorption of rare earth elements on organic matter in coal

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Journal of Rare Earths 2023年第7期41卷 1108-1115,I0005页

作者： Xiaorui Wang wei cheng Renda Xu College of Mining Guizhou UniversityGuiyang 550025China National&Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas Guiyang 550025China Guizhou Key Laboratory of Comprehensive Utilization of Non-metallic Mineral Resources Guiyang 550025China

The occurrence modes of rare earth elements(lanthanide and yttrium,abbreviated as REY) in coal are impo rtant both for coal geochemistry studies and the application potential of REY as a by-product of coalbased *** this study,the adsorption behaviors of REY on organic matter in coal were investigated by leaching tests using REY solution and ultra-low ash coal *** this basis,the adsorption mechanism of REY on organic matter in coal was also studied by molecular simulation *** leaching tests show that the organic matter in coal has a relatively strong adsorption capacity for REY,and that the average adsorption rate or the net adsorption amount of heavy rare earth elements(HREY:Gd,Tb,Y,Dy,Ho,Er,Tm,Yb and Lu) is always higher than that of the light rare earth elements(LREY:La,Ce,Pr,Nd,Sm and Eu).A molecular model of humic acid(HA) was constructed and the adsorption amount between REY and HA was *** results show that the theoretical adsorption rate of HREY(84.88%) is higher than that of the LREY(84.00%).The analysis of the adsorption distances between REY atoms and various functional groups on HA molecules shows that the minimum adsorption distance of LREY is 0.372 nm on average,which is larger than that of HREY(0.368 nm),indicating that the adsorption capacity of the latter is *** addition,a coal molecule(C_(18)H_(22)O) was also constructed to investigate the adsorption characteristics of various REY atoms on the *** a result,it is found that the average binding ene rgy and bond length between the hydroxyl functional group and LREY atoms are 0.12469 Ha(Hartree,the unit of energy in the atomic unit system) and 0.1407 nm,respectively,while for HREY,0.12883 Ha and 0.1121 nm,*** confirms that HREY is more stable than LREY in binding on organic matter in *** conclude,both leaching tests and molecular simulation calculations reveal that REY has a strong adsorption affinity for organic matter in coal,and

关键词： Coal Rare earth elements Adsorption characteristics Leaching Molecular simulation

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Lasry-Lions, Lax-Oleinik and generalized characteristics

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Science China Mathematics 2016年第9期59卷 1737-1752页

作者： CHEN Cui cheng wei Department of Mathematics Nanjing University

In the recent works, an intrinsic approach of the propagation of singularities along the generalized characteristics was obtained, even in global case, by a procedure of sup-convolution with the kernel the fundamental solutions of the associated Hamilton-Jacobi equations. In the present paper, we exploit the relations among Lasry-Lions regularization, Lax-Oleinik operators(or inf/sup-convolution) and generalized characteristics, which are discussed in the context of the variational setting of Tonelli Hamiltonian dynamics, such as Mather theory and weak KAM(Kolmogorov-Arnold-Moser) theory.

关键词： Hamilton-Jacobi equations weak KAM theory generalized characteristics

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Modeling, measurement and simulation of the disturbance torque generated via solar array drive assembly

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Science China(Technological Sciences) 2018年第4期61卷 587-603页

作者： CHEN JiangPan cheng wei LI Ming School of Aeronautic Science and Engineering Beijing University of Aeronautics and Astronautics

The disturbance torque generated via solar array drive assembly(SADA) can significantly degrade the key performance of *** discussed SADA is composed of a two-phase hybrid stepping motor and a set of two-stage straight gear reducer. Firstly, the vibration equation of the two-phase hybrid stepping motor is established via simplifying and linearizing the electromagnetic ***, based on the vibration equation established, the disturbance torque model of SADA is created via force analysis and force system simplification. Thirdly, for precisely ground measuring the disturbance torque aroused by SADA, a measurement system,including a strain micro-vibrations measurement platform(SMMP) and a set of gravity unloading device(GUD), is ***, the proposed disturbance torque model is validated by measuring and simulating the disturbance torque produced via SADA driving rigid load through GUD. The results indicate that, the proposed disturbance torque model holds the ability to describe the disturbance torque caused by SADA with high precision. Finally, the disturbance torque emitted by SADA driving a flexible load, designed to simulate solar array, is modeled and simulated via using fixed-interface mode synthesis method(FIMSM). All the conclusions drawn from this article do have a meaningful help for studying the disturbance torque produced by SADA driving solar array on orbit.

关键词： solar array drive assembly(SADA) disturbance torque stepping motor strain micro-vibrations measurement platform(SMMP) gravity unloading device(GUD) fixed-interface mode synthesis method(FIMSM)

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Identifying file-sharing P2P traffic based on traffic characteristics

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The Journal of China Universities of Posts and Telecommunications 2008年第4期15卷 112-120页

作者： cheng wei-qing GONG Jian DING wei College of Computer Nanjing University of Posts and Telecommunications Nanjing 210003 China School of Computer Science and Engineering Southeast University Nanjing 210096 China

This article focuses on identifying file-sharing peer-to-peer （P2P）（such as BitTorrent （BT）） traffic at the borders of a stub network. By analyzing protocols and traffic of applications, it is found that file-sharing P2P traffic of a single user differs greatly from traditional and other P2P （such as QQ） applications＇ traffic in the distribution of involved remote hosts and remote ports. Therefore, a method based on discreteness of remote hosts （RHD） and discreteness of remote ports （RPD） is proposed to identify BT-like traffic. This method only relies on flow information of each user host in a stub network, and no packet payload needs to be monitored. At intervals, instant RHD for concurrent transmission control protocol and user datagram protocol flows for each host are calculated respectively through grouping flows by the stub network that the remote host of each flow belongs to. On given conditions, instant RPD are calculated through grouping flows by the remote port to amend instant RHD. Whether a host has been using a BT-like application or not can be deduced from instant RHD or average RHD for a period of time. The proposed method based on traffic characteristics is more suitable for identifying protean file-sharing P2P traffic than content-based methods Experimental results show that this method is effective with high accuracy.

关键词： traffic identification concurrent flows P2P discreteness of remote hosts discreteness of remote ports

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A Modified Tikhonov Regularization Method for an Axisymmetric Backward Heat Equation

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Acta Mathematica Sinica,English Series 2010年第11期26卷 2157-2164页

作者： wei cheng Chu Li FU College of Science He'nan University of Technology Zhengzhou 450001 P. R. China School of Mathematics and Statistics Lanzhou University Lanzhou 730000 P. R. China

This paper deals with the inverse time problem for an axisymmetric heat equation. The problem is ill-posed. A modified Tikhonov regularization method is applied to formulate regularized solution which is stably convergent to the exact one. estimate between the approximate solution and exact technical inequality and improving a priori smoothness Meanwhile, a logarithmic-HSlder type error solution is obtained by introducing a rather assumption.

关键词： Ill-posed problem axisymmetric backward heat equation regularization error estimate

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Deformation, failure and removal mechanisms of thin film structures in abrasive machining

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Advances in Manufacturing 2017年第1期5卷 1-19页

作者： cheng-wei Kang Han Huang School of Mechanical and Mining Engineering TheUniversity of Queensland Brisbane QLD 4072 Australia

Thin film structures are becoming increasingly more important for industrial applications such as the making of solar panels, microelectronic devices and micro systems. However, the challenges encountered in the machining of thin film structures have been a bottleneck that impedes further wide spread uses of such structures. The development of material removal processes that are capable of producing a damage free surface at high removal rates is critical for cost effective production. Such development relies highly on a comprehensive understanding of the deformation, failure and removal mechanisms of thin film structures involved in mechanical loading. In this paper, the current understanding of the deformation characteristics of thin film systems was reviewed to provide important insights into the interracial failure under mechanical loading, with focuses on the interfacial failure mechanisms and existing problems in the machining of thin film structures. The key characterization techniques were outlined. In particular, the recent progress in the abrasive machining of a thin film multilayer structure was summarized. The potential research directions were also presented in the end of the review.

关键词： Abrasive machining Thin film Bilayer Multilayer Interface Deformation Failure

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