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Relationship between red blood cell distribution width levels and atrial fibrillation in hypertensive patients

Journal of Geriatric Cardiology 2020年第8期17卷 486-494页

作者： li-Hui ZHENG Shang-Yu liU Feng HU Zhi-Cheng HU li-shui shen ling-Min WU Yan YAO Arrhythmia Center Fuwai HospitalNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina

Background Information on the relationship between red blood cell distribution width(RDW)and atrial fibrillation(AF)in patients with essential hypertension are *** study aimed to assess the relationship between AF and RDW in hypertensive *** We enrolled 432 hypertensive patients,including 350 AF patients and 82 patients as ***'demographic,clinical,laboratory and echocardiographic characteristics were *** AF patients were further divided into the persistent and paroxysmal AF *** were monitored to identify the cardiac rhythm during blood sampling,and based on the rhythm,the paroxysmal AF group was categorized into the presence(with AF rhythm during blood sampling)and absence(with sinus rhythm during blood sampling)*** The AF group had elevated RDW levels than the controls(12.7%±0.8%vs.12.4%±0.7%,P=0.002),and the persistent AF subgroup had higher RDW levels than the paroxysmal AF subgroup(12.9%±0.8%vs.12.6%±0.8%,P=0.007).Furthermore,in the paroxysmal AF group,the presence group had higher RDW levels than the absence group(13.0%±0.6%vs.12.5%±0.9%,P=0.001).There was no significant difference in RDW levels between the persistent AF subgroup and presence group of the paroxysmal AF subgroup(P=0.533)and between the absence group of the paroxysmal AF subgroup and control group(P=0.262).In multivariate regression analysis,in hypertensive patients,the presence of AF rhythm is an independent predictor for increased RDW concentration(P=0.001).Conclusions The RDW may be associated with the presence of AF rhythm,which implies the importance of maintaining the sinus rhythm in hypertensive patients.

关键词： Atrial fibrillation Hypertension Inflammation Red blood cell distribution width

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Ablation strategies for arrhythmogenic right ventricular cardiomyopathy: a systematic review and meta-analysis

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Journal of Geriatric Cardiology 2020年第11期17卷 694-703页

作者： li-shui shen li-Min liU li-Hui ZHENG Feng HU Zhi-Cheng HU Shang-Yu liU Jin-Rui GUO Kush Kumar Bhagat Yan YAO Arrhythmia Center Fuwai HospitalNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina Arrhythmia Center Yunnan Fuwai Cardiovascular HospitalKunmingChina Eternal hospital JaipurRajasthanIndia

Background Catheter ablation for ventricular tachycardia(VT) in patients with arrhythmogenic right ventricular cardiomyopathy(ARVC) has significantly evolved over the past decade. However, different ablation strategies showed inconsistency in acute and long-term outcomes. Methods We searched the databases of Medline, Embase and Cochrane library through October 17, 2019 for studies describing the clinical outcomes of VT ablation in ARVC. Data including VT recurrence, all-cause mortality, acute procedural efficacy and major procedural complications were extracted. A meta-analysis with trial sequential analysis was further performed in comparative studies of endo-epicardial versus endocardial-only ablation. Results A total of 24 studies with 717 participants were enrolled. The literatures of epicardial ablation were mainly published after 2010 with total ICD implantation of 73.7%, acute efficacy of 89.8%, major complication of 5.2%, follow-up of 28.9 months, VT freedom of 75.3%, all-cause mortality of 1.1% and heart transplantation of 0.6%. Meta-analysis of 10 comparative studies revealed that compared with endocardial-only approach, epicardial ablation significantly decreased VT recurrence(OR: 0.50;95% CI: 0.30–0.85;P = 0.010), but somehow increased major procedural complications(OR: 4.64;95% CI: 1.28–16.92;P = 0.02), with not evident improvement of acute efficacy(OR: 2.74;95% CI: 0.98–7.65;P = 0.051) or all-cause mortality(OR: 0.87;95% CI: 0.09–8.31;P = 0.90). Conclusion Catheter ablation for VT in ARVC is feasible and effective. Epicardial ablation is associated with better long-term VT freedom, but with more major complications and unremarkable survival or acute efficacy benefit.

关键词： Arrhythmogenic right ventricular cardiomyopathy Catheter ablation Ventricular tachycardia

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Meta label associated loss for fine-grained visual recognition

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Science China(Information Sciences) 2024年第6期67卷 230-247页

作者： Yanchao li Fu XIAO Hao li Qun li shui YU School of Computer Science Nanjing University of Posts and Telecommunications School of Network Engineering Zhoukou Normal University School of Computer Science University of Technology Sydney

Recently, intensive attempts have been made to design robust models for fine-grained visual recognition, most notably are the impressive gains for training with noisy labels by incorporating a reweighting strategy into a meta-learning framework. However, it is limited to up or downweighting the contribution of an instance for label reweighting approaches in the learning process. To solve this issue, a novel noise-tolerant method with auxiliary web data is proposed. Specifically, first, the associations made from embeddings of well-labeled data with those of web data and back at the same class are measured. Next, its association probability is employed as a weighting fusion strategy into angular margin-based loss, which makes the trained model robust to noisy datasets. To reduce the influence of the gap between the well-labeled and noisy web data, a bridge schema is proposed via the corresponding loss that encourages the learned embeddings to be coherent. Lastly, the formulation is encapsulated into the meta-learning framework, which can reduce the overfitting of models and learn the network parameters to be noise-tolerant. Extensive experiments are performed on benchmark datasets, and the results clearly show the superiority of the proposed method over existing state-of-the-art approaches.

关键词： label associated loss weighting noisy samples fine-grained visual recognition noise-tolerant learning meta-learning

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Theoretical Analysis of Cooperative Driving at Idealized Unsignalized Intersections

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Tsinghua Science and Technology 2024年第1期29卷 257-270页

作者： shen li Jiawei Zhang Zhenwu Chen li li Department of Civil Engineering Tsinghua UniversityBeijing 100084China Department of Automation Tsinghua UniversityBeijing 100084China shenzhen Urban Transport Planning Center Co. Ltd.Shenzhen 518000China

Cooperative driving is widely viewed as a promising method to better utilize limited road resources and alleviate traffic *** recent years,several cooperative driving approaches for idealized traffic scenarios(i.e.,uniform vehicle arrivals,lengths,and speeds)have been ***,theoretical analyses and comparisons of these approaches are *** this study,we propose a unified group-by-group zipper-style movement model to describe different approaches synthetically and evaluate their *** derive the maximum throughput for cooperative driving plans of idealized unsignalized intersections and discuss how to minimize the delay of *** obtained conclusions shed light on future cooperative driving studies.

关键词： cooperative driving connected and automated vehicles unsignalized intersection

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Auto-parametric resonance of a continuous-beam-bridge model under two-point periodic excitation:an experimental investigation and stability analysis

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Earthquake Engineering and Engineering Vibration 2024年第2期23卷 445-454页

作者： li Yuchun shen Chao liu Wei li Dong Department of Hydraulic Engineering College of Civil EngineeringTongji UniversityShanghai 200092China

The auto-parametric resonance of a continuous-beam bridge model subjected to a two-point periodic excitation is experimentally and numerically investigated in this *** auto-parametric resonance experiment of the test model is conducted to observe and measure the auto-parametric resonance of a continuous beam under a two-point excitation on *** parametric vibration equation is established for the test model using the finite-element *** auto-parametric resonance stability of the structure is analyzed by using Newmark's method and the energy-growth exponent *** effects of the phase difference of the two-point excitation on the stability boundaries of auto-parametric resonance are studied for the test *** with the experiment,the numerical instability predictions of auto-parametric resonance are consistent with the test phenomena,and the numerical stability boundaries of auto-parametric resonance agree with the experimental *** a continuous beam bridge,when the ratio of multipoint excitation frequency(applied to the columns)to natural frequency of the continuous girder is approximately equal to 2,the continuous beam may undergo a strong auto-parametric *** with the present experiment and analysis,a hypothesis of Volgograd Bridge's serpentine vibration is discussed.

关键词： auto-parametric resonance continuous beam bridge model two-point excitation experimental investigation stability analysis vibration of Volgograd Bridge

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Mechanism of microarc oxidation on AZ91D Mg alloy induced byβ-Mg_(17)Al_(12) phase

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International Journal of Minerals,Metallurgy and Materials 2024年第4期31卷 712-724页

作者： Dajun Zhai Xiaoping li Jun shen College of Materials Science and Engineering Chongqing UniversityChongqing 400044China

This work proposed a strategy of indirectly inducing uniform microarc discharge by controlling the content and distribution ofβ-Mg_(17)Al_(12)phase in AZ91D Mg *** kinds of nano-particles(ZrO_(2)and TiO_(2))were designed to be added into the substrate of Mg alloy by friction stir processing(FSP).Then,Mg alloy sample designed with different precipitated morphology ofβ-Mg_(17)Al_(12)phase was treated by microarc oxidation(MAO)in Na_(3)PO_(4)/*** characteristics and performance of the MAO coating was analyzed using scanning electron microscopy(SEM),energy dispersive spectrometer(EDS),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),contact angle meter,and potentiodynamic *** was found that the coarseα-Mg grains in extruded AZ91D Mg alloy were refined by FSP,and theβ-Mg_(17)Al_(12)phase with reticular structure was broken and *** nano-ZrO_(2)particles were pinned at the grain boundary by FSP,which refined theα-Mg grain and promoted the precipitation ofβ-Mg_(17)Al_(12)phase in *** effectively inhibited the“cascade”phenomenon of microarcs,which induced the uniform distribution of discharge *** MAO coating on Zr-FSP sample had good wettability and corrosion ***,TiO_(2)particles were hardly detected in the coating on TiFSP sample.

关键词： AZ91D Mg alloy microarc oxidation friction stir processing ZrO_(2) TiO_(2) β-Mg_(17)Al_(12)

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Factors influencing adherence to non-vitamin K antagonist oral anticoagulants in the early period after atrial fibrillation catheter ablation in China

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Chinese Medical Journal 2020年第16期133卷 1989-1991页

作者： Zhi-Cheng Hu Shang-Yu liu ling-Min Wu li-shui shen li-Min liu Guo-liang li li-Hui Zheng Yan Yao Cardiac Arrhythmia Center Fuwai HospitalNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100037China Department of Cardiology First Affiliated Hospital of Xi’an Jiaotong UniversityXi’anShaanxi 710061China

Anticoagulants are routinely prescribed in the first several weeks after atrial fibrillation(AF)catheter *** K antagonist oral anticoagulants(NOACs)have been recommended over warfarin for their *** warfarin need regular clinical visit to perform blood test,NOACs are more patient *** the lack of routine medical contact may lead to poor *** adherence to anticoagulant treatment is essential for both efficacy and *** NOACs are increasingly commonly used in China,it is therefore necessary to evaluate the adherence of NOACs after AF catheter *** purpose of this research was to investigate the treatment adherence and identify factors that could improve the quality of anticoagulation.

关键词： vitamin routine fibrillation

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Research on a Monte Carlo global variance reduction method based on an automatic importance sampling method

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Nuclear Science and Techniques 2024年第5期35卷 200-215页

作者： Yi-sheng Hao Zhen Wu shen-shen Gao Rui Qiu Hui Zhang Jun-li li Department of Engineering Physics Tsinghua UniversityBeijing 100084China Key Laboratory of Particle and Radiation Imaging of Ministry of Education Beijing 100084China Nuctech Company limited Beijing 100084China

Global variance reduction is a bottleneck in Monte Carlo shielding *** global variance reduction problem requires that the statistical error of the entire space is *** study proposed a grid-AIS method for the global variance reduction problem based on the AIS method,which was implemented in the Monte Carlo program *** proposed method was validated using the VENUS-Ⅲ international benchmark problem and a self-shielding calculation *** results from the VENUS-Ⅲ benchmark problem showed that the grid-AIS method achieved a significant reduction in the variance of the statistical errors of the MESH grids,decreasing from 1.08×10^(-2) to 3.84×10^(-3),representing a 64.00% *** demonstrates that the grid-AIS method is effective in addressing global *** results of the selfshielding calculation demonstrate that the grid-AIS method produced accurate computational ***,the grid-AIS method exhibited a computational efficiency approximately one order of magnitude higher than that of the AIS method and approximately two orders of magnitude higher than that of the conventional Monte Carlo method.

关键词： Monte Carlo Global variance reduction Reactor shielding Automatic importance sampling

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Function-reversible facets enabling SrTiO_(3)nanocrystals for improved photocatalytic hydrogen evolution

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Frontiers in Energy 2024年第1期18卷 101-109页

作者： Bin WANG Bei AN Xiaoqian li Shaohua shen School of Physics Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter(Ministry of Education)Key Laboratory of Shaanxi for Advanced Materials and Mesoscopic PhysicsXi’an Jiaotong UniversityXi’an 710049China International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power EngineeringXi’an Jiaotong UniversityXi’an 710049China

It has been widely reported that,for faceted nanocrystals,the two adjacent facets with different band levels contribute to promoted charge separation,and provide active sites for photocatalytic reduction and oxidation reaction,*** such cases,only one family of facets can be used for photocatalytic hydrogen ***,by using SrTiO_(3)nanocrystals enclosed by{023}and{001}facets as a model photocatalyst,this paper proposed a strategy to achieve the full-facets-utilization of the nanocrystals for photocatalytic hydrogen via chemically depositing Pt nanoparticles on all *** photo-deposition experiment of CdS provided direct evidence to demonstrate that the{023}facets which were responsible for photooxidation reaction can be function-reversed for photocatalytic hydrogen evolution after depositing Pt nanoparticles,together with the{001}***,the full-facets-utilization led to a much-improved activity for photocatalytic hydrogen,in contrast to those SrTiO_(3)nanocrystals with only{001}facets deposited by Pt nanoparticles via a photo-deposition method.

关键词： SrTiO_(3)nanocrystals crystal facets photocatalysis hydrogen evolution

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Application of Strut-and-Tie Model Zone in Post-tensioned for Design of Interior Anchorage Concrete Structure

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Journal of Shanghai Jiaotong university(Science) 2010年第3期15卷 273-278页

作者：赵建立沈水龙孙阳 State Key Laboratory of Ocean Engineering Shanghai Jiaotong University Shanghai 200240 China

This paper presents an application of strut-and-tie model(STM) to design the interior anchorage zone(IAZ) in the post-tensioned concrete *** STM theory and range of IAZ are ***,based on the finite element analysis,a series of simplified equations to calculate internal forces in IAZ are ***,the STM model for IAZ is *** the proposed STM model,internal forces in ties vary with the dimension ratio and the eccentricity of *** U-turn of internal forces is suggested to allocate rebar to resist bearing flexural tensile *** with the FIP(International Federation for Prestressing) model,the proposed STM model is more reasonable and applicable.

关键词： post-tensioned concrete structure interior anchorage zone (IAZ) strut-and-tie model (STM) internal forces simplified equations

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