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Cardiac arrhythmia and heart failure： From bench to bedside

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Journal of Geriatric Cardiology 2011年第3期8卷 131-132页

作者： yong-fu Xiao Cardiac Rhythm Disease Management Medtronic Inc. 8200 Coral Sea Street NE MVN46 Mounds View MN 55112 USA

Cardiac arrhythmia is an abnormal rate and/or rhythm of a heart due to its abnormal electrical impulse origination and/or propagation. Various etiologies can cause arrhythmias. Heart failure （HF） is a clinical syndr... 详细信息

关键词： cardiac arrhythmia heart failure aging

Spinodal dynamics of metastable glass transition domains in amorphous polymer towards thermomechanically tailorable shape memory effect

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Science China(Technological Sciences) 2023年第8期66卷 2432-2440页

作者： LIU JingYun LU HaiBao fu yong-Qing Science and Technology on Advanced Composites in Special Environments Laboratory Harbin Institute of TechnologyHarbin 150080China Faculty of Engineering and Environment Northumbria UniversityNewcastle upon TyneNE18STUK

Glass transition plays a critical role to determine the dynamic behaviors of amorphous shape memory polymers(SMPs).However,the fundamental relationships between shape memory effect(SME)and dynamic glass transition have not been well understood,even though this topic has been studied for *** this study,we apply a mean-square displacement function of Adam-Gibbs(AG)domain size model to explore metastable glass transition between normal glass state and rubbery state of amorphous SMPs,based on both mode-coupling theory and mean-field model.A statistic viscosity equation is formulated to study the dynamic glass transition of metastable AG domains in an amorphous SMP.A dynamically spinodal model is also developed to connect dynamic glass transitions to thermomechanical processes,based on statistic viscosity equation and phase transition ***,using the spinodal models,multiple shape memory behaviors have been predicted for amorphous SMPs with dual-,triple-and quadruple-SMEs,resulted from their different routes of themomechanical ***,the proposed models are verified using the experimental data reported in literature.

关键词： shape memory polymer glass transition dynamics metastable

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Active disturbance rejection control for hydraulic width control system for rough mill

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第9期8卷 1429-1434页

作者： ZOU Jun fu Xin YANG Hua-yong Institute State Key Laboratoty of Fhtid Power Transmission and Control. Zhejiang University Hangzhou 310027 China

The highly nonlinear behavior of the system limits the performance of classical linear proportional and integral （PI） controllers used for hot rolling. An active disturbance rejection controller is proposed in this paper to deal with the nonlinear problem of hydraulic servo system in order to preserve last response and small overshoot of control system. The active disturbance rejection （ADR） controller is composed of nonlinear tracking differentiator （TD）, extended state observer （ESO） and nonlinear feedback （NF） law. An example of the hydraulic edger system case study is investigated to show the effectiveness and robustness of the proposed nonlinear controller, especially, in the circumstance of foreign disturbance and working condition variation, compared with classic PI controller.

关键词： Active disturbance rejection (ADR) Hydraulic servo system Width control Rough mill

Nonlinear Numerical Analysis of Vortex-Induced Vibration of A Three-Dimensional Deepwater Steep Wave Riser with Large Deformation Features

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China Ocean Engineering 2022年第4期36卷 601-613页

作者： CHENG yong SONG fu-kai LI Ming-xin School of Naval Architecture and Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China

The cross-flow(CF)vortex-induced vibration(VIV)of a deepwater steep wave riser(SWR)subjected to uniform or shear flow loads is investigated *** model is based on a three-dimensional(3D)nonlinear elastic rod theory coupled with a wake oscillator *** this numerical simulation,the nonlinear motion equations of the riser with large deformation features are established in a global coordinate system to avoid the transformation between global and local coordinate systems,and are discretized with the time-domain finite element method(FEM).A wakeoscillator model is employed to study the vortex shedding,and the lift force generated by the wake flow is described in a van der Pol equation.A Newmark-βiterative scheme is used to solve their coupling equation for the VIV response of the *** developed model is validated against the existing experimental results for the VIV response of the top-tension riser(TTR).Then,the numerical simulations are executed to determine VIV characteristics of the *** effects of both flow velocity and the spanwise length of the flow field on the drag coefficient in the inline(IL)direction and the lift coefficient in the CF direction are investigated *** results indicate that compared with TTR,the low frequency and multi-modal vibration are the main components of the SWR due to the large deformation and flexible *** shear flow,the multi-frequency resonance dominates the VIV response of the SWR,especially at the hang-off segment.

关键词： steep wave riser vortex-induced vibration time domain simulation nonlinear finite element wake oscillator

Crystallization and heat transfer of CaO-SiO2-based slag for high-Mn-high-Al steel

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Journal of Iron and Steel Research International 2020年第7期27卷 788-795页

作者： Jie Yang Deng-fu Chen Miao-yong Zhu College of Material Science and Engineering Chongqing UniversityChongqing400044China School of Metallurgy Northeastern UniversityShenyang 110819LiaoningChina

The crystallization and heat transfer of CaO-SiO2-based slag for high-Mn-high-Al steel have been investigated by coupling composition evolution with heat transfer and non-isothermal *** was found that the concentrations of Al2O3 and MnO in the slag were determined by the relative contents of Al and Mn in molten *** temperature of the slag rose with the increase in Al2O3 content first and then fell due to the coupled effects of basicity and Al2O3,and a small amount of MnO cannot change this *** viscosity of slags led to less obvious characterizations of *** crystalline phase analysis suggested that MnO accumulation suppressed the formation of fluorite *** the Al2O3 content increased,the precipitation of cuspidine was replaced by the blocky gehlenite crystals,while the number and the size of nepheline and fluorite crystals both *** to the thickness and the crystallization structure of slags,the heat flux in the slag film first decreased and then increased with higher Al2O3 ***,a new type of CaO-SiO2-based mold slag with high basicity was applied in plant trial,and the change in composition and properties of mold slag was studied.

关键词： High-Mn-high-Al steel Mold slag Al2O3 accumulation Crystallization Heat transfer

Over-expression of an AT-hook gene,AHL22,Delays Flowering and Inhibits the Elongation of the Hypocotyl in Arabidopsis Thaliana

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Over-expression of an AT-hook gene,AHL22,Delays Flowering an...

Stratum energy of coal-bed gas reservoir and their control on the coal-bed gas reservoir formation

中国植物生理学会第十次会员代表大会暨全国学术年会

作者： Chaowen Xiao1,3, fulu Chen1,3, Xuhong Yu2,3, Chentao Lin2,*, yong-fu fu1,* 1Institute of Crop Sciences, The National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), Chinese Academy of Agricultural Sciences, Nandajie12, Zhongguancun, Haidian District, Beijing 100081, P.R. China 2Department of Molecular, Cell & Developmental Biology, University of California, Los Angeles, CA90095

＜正＞The Arabidopsis genome encodes 29 AHL （AT-hook motif nuclear localized） proteins, but the function for most of them remains unknown. We report here a study of the AHL22 gene, which was originally identified

关键词： Arabidopsis thaliana AT-hook flowering time hypocotyl photomorphogenesis

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Science China Earth Sciences 2007年第9期50卷 1319-1326页

作者： WU CaiFang QIN yong fu XueHai Department of Earth Resources and Geosciences China University of Mining & Technology Xuzhou 221008 China Department of Earth Resources and Geosciences China University of Mining & Technology Xuzhou 221008 China Department of Earth Resources and Geosciences China University of Mining & Technology Xuzhou 221008 China

Stratum energy of coal-bed gas reservoir, including coal-radix flexibility energy, groundwater flexibility energy and gas flexibility energy (hereinafter "three energy"), depends on the energy homeostasis system, the core process of which is the effective transfer of energy and the geological selective process. Combining with the mechanics experimentations of coal samples, different flexibility energy has been analyzed and researched quantificationally, and a profound discussion to their controls on the coal-bed gas reservoir formation has been made. It is shown that when gas reservoir is surrounded by edge water and bottom water, the deposited energy in the early phase of forming gas reservoir is mostly coal-radix and gas flexibility energy, but the effect of groundwater flexibility energy increases while water-body increases. The deposited energy in the middle and later phase of forming gas reser voir is mostly gas flexibility energy, which is greater than 80% of all deposited energy. In the whole process, larger groundwater body exerts greater influences on gas accumulation. The paper indicated that higher stratum energy is more propitious to forming coal-bed gas reservoir. And higher coal-radix flexibility energy and gas flexibility energy are more propitious to higher yield of gas reservoirs, while higher groundwater flexibility energy is more propitious to stable yield of gas reservoirs. Therefore, the key to evaluating the coal-bed gas reservoir formation is the stratum energy of coal-bed gas reservoir.

关键词： coal-bed reservoir, flexibility energy, coal-radix flexibility energy, groundwater flexibility energy, gas flexibility energy, coal-bed gas reservoir formation

Local functional Limit Theorems of Increments for Brownian Motion

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Acta Mathematica Sinica,English Series 2018年第7期34卷 1074-1086页

作者： fu Qing GAO yong Hong LIU School of Mathematics and Statistics Wuhan University Wuhan 430072 P. R. China Guangxi Colleges and Universities Key Laboratory of Data Analysis and Computation School of Mathematics and Computing Science Guilin University of Electronic Technology Guilin 541004 P. R. China

In this paper, we present a local Csorgo- Revesz type functional limit theorem for increments of Brownian motion and give its convergence rate. The results also extend the functional forms of Levy＇s modulus of contin... 详细信息

关键词： Keywords Brownian motion increment local functional limit rate of convergence large deviation small deviation

Multi-frequency VLBI Observations of NRAO 150

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Chinese Journal of Astronomy and Astrophysics 2001年第6期1卷 507-513页

作者： yong-JunChen Dong-RongJiang fu-JunZhang ShanghaiAstronomicalObservatory ChineseAcademyofSciencesShanghai200030 NationalAstronomicalObservatories ChineseAcademyofSciencesBeijing100012

We present multi-frequency, high resolution, radio structures of NRAO 150 with VLBA and EVN array respectively, both of which show a very collimated one-sided jet structure beyond an angular distance of 80 mas. Model fitting is performed for observations at 2.3 GHz and 8.4 GHz which reveal the source to be consisting of several components at position angle -30°. According to the light curves at 4.8 GHz, 8.0 GHz and 14.5 GHz an outburst is currently occurring in its rising stage, which suggests that a new component is probably in the course of forming. Spectral analysis reveals that the new component probably has a higher spectral index. The maximum proper motion of -0.46 mas yr-1 is expected if we suppose that the new component is moving away from core at the beginning of the flaring.

关键词： galaxies: active - galaxies: radio source: individual: NRAO 150 -radio structure: galaxies