检索结果-南通市图书馆

Clinical characteristics and management of coexistent cardiomyopathy in patients with bicuspid aortic valve

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2023年第3期20卷 205-213页

作者： Di ZHANG Yi-Ting LU ze-Min ZHOU Yu-Xiao HU xin-Chang liu Yi QU Ya-xin liu Xian-Liang ZHOU Department of Cardiology Fuwai HospitalNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina Emergency and Critical Care Center Fuwai HospitalNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina

BACKGROUND Bicuspid aortic valve(BAV)is the most common congenital heart ***,the prevalence,clinical characteristics,and current management of BAV associated with inherited cardiomyopathy,including hypertrophic cardiomy-opathy(HCM),dilated cardiomyopathy(DCM),and left ventricular noncompaction(LVNC)have not been well *** Consecutive patients diagnosed with BAV at a large tertiary cardiovascular referral center between 2009 and 2018 were retrospectively assessed for HCM,DCM,and LVNC based on clinical and echocardiographic *** with coexist-ent conditions were investigated *** Of 3533 patients with BAV screened,57(1.6%)had concomitant *** was combined with HCM in 30 of these patients,with DCM in 19,and with LVNC in ***-six patients(80.7%)were male,and the mean age at first dia-gnosis was 47 years for BAV with HCM,49 years for BAV with DCM,and 35 years for BAV with *** failure and aortic valve dysfunction were common in these patients,and the prevalence of coexisting aortopathy was 43.3%,26.3%and 25.0%,re-spectively,for BAV with HCM,DCM and *** the index hospitalization,24 of the 57 patients(42.1%)underwent sur-gery,16(28%)underwent aortic valve and/or aortic surgery,and 16 of the 30 patients with HCM had a Morrow *** were no deaths or other major adverse cardiovascular *** The prevalence of inherited cardiomyopathy was higher in our patients with BAV than in the general *** and heart failure were common,with almost half of patients requiring surgery at diagnosis.

关键词： patients cardiomyopathy aortic

Visible-light-responsive homologous heterostructure of oxynitrides constructed to boost charge separation and water splitting

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第01期 186-191页

作者： Hai Zou Yunfeng Bao Xueshang xin Yu Qi Tengfeng Xie Fuxiang Zhang State Key Laboratory of Catalysis Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences School of Chemistry and Chemical Engineering Liaoning Normal University College of Chemistry Jilin University

Constructing type II heterostructures represents a widely recognized strategy for enhancing charge separation and photocatalytic efficiency,but it remains challenging to fabricate homologous heterostructures based on visible-light-responsive semiconductors,especially for popularly investigated （oxy）nitrides with low thermal ***,we synthesized a homologous heterostructure （denoted as YTON＿H） based on the oxynitrides of YTaO4-xNyand YTa *** heterostructure exhibits type II band structure alignment and intimate interface achieved through a magnesium （Mg） powder-assisted nitridation *** with widely reported heterologous heterostructures,the as-obtained YTON＿H homologous heterostructure could similarly exhibit enhanced charge separation as well as photocatalytic water splitting performance with respect to its counterparts(YTaO4-xNyand YTaON2).Meanwhile,detailed structural characterizations and spectroscopy analysis have been made to confirm the formation of heterostructure and promotion of spatial charge separation.

关键词：

同方期刊数据库

Adsorption and Diffusion of Hydrogen Atom on Low-index Ag Planes

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2005年第10期24卷 1217-1223页

作者： ZHANG Jing DIAO Zhao-Yu WANG ze-xin Department of Chemistry Shandong Normal University Jinan 250014 China

The 5-parameter Morse potential （5-MP） of the interaction between H atom and Ag surfaces has been constructed. The adsorption and diffusion of H on Ag low-index surfaces are investigated with 5-MP in detail. The characteristics of critical points are obtained. The theoretical results show that H atom can only adsorb at the three-fold site on Ag（111 ）; the quasi-3-fold site and long-bridge site are stable adsorption sites on Ag（110） surface for the H atom, and at low coverage hydrogen predominantly occupies the quasi-3-fold site. This work predicts that the four-fold hollow site is the most stable adsorption state for H atom on Ag（100）. The results of this work are approved by the experimental and theoretical results.

关键词： H-Ag system 5-MP adsorption vibration low-index surfaces

Interconnections between diabetic corneal neuropathy and diabetic retinopathy:diagnostic and therapeutic implications

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第8期20卷 2169-2180页

作者： Mingyi Yu Faith Teo En Ning Chang liu Yu-Chi liu Tissue Engineering and Stem Cell Group Singapore Eye Research InstituteSingapore Yong Loo Lin School of Medicine National University of SingaporeSingapore Department of Cornea and External Eye Disease Singapore National Eye CenterSingapore Ophthalmology and Visual Sciences Academic Clinical Program Duke-NUS Medical SchoolSingapore

Diabetic corneal neuropathy and diabetic retinopathy are ocular complications occurring in the context of diabetes *** corneal neuropathy refers to the progressive damage of corneal *** retinopathy has traditionally been considered as damage to the retinal ***,growing evidence suggests that diabetic retinopathy is a complex neurovascular disorder resulting from dysfunction of the neurovascular unit,which includes both the retinal vascular structures and neural *** retinopathy is one of the leading causes of blindness and is frequently screened for as part of diabetic ocular ***,diabetic corneal neuropathy is commonly overlooked and underdiagnosed,leading to severe ocular surface *** studies have found that these two conditions tend to occur together,and they share similarities in their pathogenesis pathways,being triggered by a status of chronic *** review aims to discuss the interconnection between diabetic corneal neuropathy and diabetic retinopathy,whether diabetic corneal neuropathy precedes diabetic retinopathy,as well as the relation between the stage of diabetic retinopathy and the severity of corneal *** also endeavor to explore the relevance of a corneal screening in diabetic eyes and the possibility of using corneal nerve measurements to monitor the progression of diabetic retinopathy.

关键词： cornea corneal nerves diabetes diabetic corneal neuropathy diabetic retinopathy retina

Wafer-Scale Vertical 1D GaN Nanorods/2D MoS₂/PEDOT:PSS for Piezophototronic Effect-Enhanced Self-Powered Flexible Photodetectors

在线全文

学校读者我要写书评

暂无评论

NANO-MICRO LETTERS 2025年第1期17卷 1-15页

作者： Tang, xin Jiang, Hongsheng Lin, Zhengliang Wang, Xuan Wang, Wenliang Li, Guoqiang South China Univ Technol State Key Lab Luminescent Mat & Devices Guangzhou 510640 Peoples R China South China Univ Technol Sch Mat Sci & Engn Dept Elect Mat Guangzhou 510640 Peoples R China

Vertical 1D GaN nanorod arrays/2D MoS2/PEDOT:PSS heterostructures in wafer scale have been fabricated for flexible photodetection ***-powered flexible photodetector at compressive strain reveals a significantly enhanced photoresponse with a responsivity of 2.47 A W-1 and response times of 40/45 mu s, which are superior to the state-of-the-art flexible *** work not only provides a valuable strategy for the design and construction of tunable van der Waals heterostructures, but also opens a new opportunity for flexible sensors. van der Waals (vdW) heterostructures constructed by low-dimensional (0D, 1D, and 2D) materials are emerging as one of the most appealing systems in next-generation flexible photodetection. Currently, hand-stacked vdW-type photodetectors are not compatible with large-area-array fabrication and show unimpressive performance in self-powered mode. Herein, vertical 1D GaN nanorods arrays (NRAs)/2D MoS2/PEDOT:PSS in wafer scale have been proposed for self-powered flexible photodetectors arrays firstly. The as-integrated device without external bias under weak UV illumination exhibits a competitive responsivity of 1.47 A W-1 and a high detectivity of 1.2 x 1011 Jones, as well as a fast response speed of 54/71 mu s, thanks to the strong light absorption of GaN NRAs and the efficient photogenerated carrier separation in type-II heterojunction. Notably, the strain-tunable photodetection performances of device have been demonstrated. Impressively, the device at - 0.78% strain and zero bias reveals a significantly enhanced photoresponse with a responsivity of 2.47 A W-1, a detectivity of 2.6 x 1011 Jones, and response times of 40/45 mu s, which are superior to the state-of-the-art self-powered flexible photodetectors. This work presents a valuable avenue to prepare tunable vdWs heterostructures for self-powered flexible photodetection, which performs well in flexible sensors.

关键词： Vertical nanorod arrays van der Waals heterostructure Piezophototronic effect Self-powered photodetection Flexible sensors

Numerical investigation on the drag force of a single bubble and bubble swarm Authors

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2020年第6期32卷 1043-1049页

作者： Ling-xin Zhang ze-cai Zhou Xue-ming Shao Department of Engineering Mechanics Zhejiang UniversityHangzhou310027China

The bubble drag force correlation plays an important role in the numerical simulation accuracy of gas/liquid *** order to systematically investigate the interphase drag force of non-buoyancy driven bubbly flows,a dynamic-positioning body force(DPBF)method is developed in this *** is proved that this method has an enough computation *** this method,a series of direct numerical simulation(DNS)cases of a single bubble with low-intermediate Re(1≤Re≤200)and a bubble swarm with low Re(5.6≤Re≤45)are carried out and the bubble drag coefficients are *** on all the DNS data,the drag correlations with dimensionless parameters(Re,We for a single bubble and Re,We,gas fraction for bubble swarm)are systematically investigated and reported in this paper,which can provide a reference to the development of drag force closure model for non-buoyancy driven bubbly flows.

关键词： Gas/liquid flow bubble direct numerical simulation drag force

Sensing properties and mechanisms of LaF_(3)-Co_(3)O_(4) nanorods for low-concentration methanol detection

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2024年第5期43卷 2193-2204页

作者： Xiao-Xi He Hong-Feng Chai Yi-Wen Zhou Ke-Wei liu ze-xin Yu Chao Zhang College of Mechanical Engineering Yangzhou UniversityYangzhou225127China Institutefor Manufacturing Technologies of Ceramic Components and Composites(IMTCCC) University of Stuttgart70569 StuttgartGermany

Methanol is one of the characteristic gases that distinguish between healthy individuals and lung cancer(LC)lesions in exhaled human *** concentration in exhaled breath is generally below one part per million(1×10^(-6)).The second-phase composite is widely regarded as one of the methods to improve the gas-sensing perfor-mance of metal oxide semiconductor(MOS)*** this study,LaF_(3)-Co_(3)O_(4) was synthesized by a simple hydrothermal method to enhance its low-concentration methanol gas-sensing performance.5 at%LaF_(3)-Co_(3)O_(4) nanorods exhibited excellent methanol detection performance,including a wider linear detection concentration range(0.2×10^(-6)~5×10^(-6)),a response value exceeding 4.0 for 1×10^(-6)methanol at 275°C and 75%relative humidity(RH),long-term stability(maximum deviation within 15%over 2 weeks),and excellent *** mechanism of performance enhancement was studied using various techniques,and density functional *** special spinel structure of Co_(3)O_(4),the high ionic migration of F-in LaF_(3),the larger specific surface area of 5 at%LaF_(3)-Co_(3)O_(4) nanorods,and the generated crystal defects all explain the excellentmethanol gas-sensing *** work provides a novel route to prepare MOS composite materials for low-concentration methanol gas detection.

关键词： Gas sensor LaF_(3) Co_(3)O_(4) Methanol Lung cancer

Experimental advances in superlubricity

在线全文

学校读者我要写书评

暂无评论

Friction 2014年第2期2卷 182-192页

作者： Quanshui ZHENG ze liu Department of Engineering Mechanics CNMMAPLTsinghua UniversityBeijing 100084China National Key Lab of Tribology Tsinghua UniversityBeijing 100084China

Superlubricity,or structural lubricity,is a state that has two contacting surfaces exhibiting no resistance to *** effect has been theoretically described to be possible between two completely clean single crystalline solid ***,experimental observations of superlubricity were limited to nanoscale and under high vacuum or inert gas environments even after twenty years since the concept of superlubricity has been suggested in *** the last two years,remarkable advances have been achieved in experimental observations of superlubricity ranging from micro-scale to centimeters and in ambient *** study aims to report a comprehensive understanding of the superlubricity phenomenon.

关键词： Superlubicity microscale macroscale ambient condition mechanism

基于尺寸效应的钛合金二维超声辅助精密切削特性研究

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

河南理工大学学报（自然科学版） 2025年第1期44卷 117-123页

作者：王鑫刘建慧焦锋新乡航空工业(集团)有限公司河南新乡453000 河南理工大学机械与动力工程学院河南焦作454000

目的为了减少尺寸效应对精密加工的影响,提高钛合金微尺度切削的加工精度与表面质量,方法将特种加工理论和精密切削方法相结合,提出二维超声辅助精密切削方法。首先,基于ABAQUS力-热耦合模型分析二维超声辅助精密切削钛合金的切削过程,... 详细信息

目的为了减少尺寸效应对精密加工的影响,提高钛合金微尺度切削的加工精度与表面质量,方法将特种加工理论和精密切削方法相结合,提出二维超声辅助精密切削方法。首先,基于ABAQUS力-热耦合模型分析二维超声辅助精密切削钛合金的切削过程,探究精密切削与二维超声辅助精密切削的切削力学特性;其次,通过试验以超声振幅、切削深度与刃口半径的比值(a_(p)/r_(n))为因素,分析尺寸效应作用下超声振动切削中切削力及单位切削力的变化规律;最后,对比分析精密切削与二维超声辅助精密切削在不同切削深度与刃口半径的比值(a_(p)/r_(n))下的表面形貌特征。结果结果表明,随着切削深度与刃口半径的比值(a_(p)/r_(n))增大,精密切削钛合金表面形貌出现黏结、凹坑、耕犁现象,而二维超声辅助精密切削加工表面则出现均匀、完整的网状表面纹理特征。另外,二维超声辅助精密切削加工单位切削力远小于精密切削加工的,且随着振幅增大,单位切削力的增长比值由57.7%降至45.2%。结论二维超声辅助精密切削能够显著改善尺寸效应中产生的负前角效应和犁切现象,降低单位切削力,提高切削过程的稳定性,在提高钛合金微尺度切屑加工精度和表面质量方面具有重要应用价值。

关键词：二维超声辅助切削尺寸效应刃口半径切削力