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Echocardiographic Measurements in Normal Chinese Adults (EMINCA) II focusing on left ventricular and left atrial size and function by three-dimensional echocardiography

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FRONTIERS OF MEDICINE 2024年第4期18卷 649-663页

作者： Wang, Yingbin Zhang, Yu Yao, Guihua Tang, Hong Chen, Lixin Yin, Lixue Zhu, Tiangang Yuan, Jianjun Han, Wei Yang, Jun Shu, Xianhong Yang, Ya Wei, Yulin Guo, Yanli Ren, Weidong Gao, Dongmei Lu, Guilin Wu, Ji Yin, Hongning Mu, Yuming Tian, Jiawei Yuan, Lijun Ma, Xiaojing Dai, Hongyan ding, Yunchuan ding, mingyan Zhou, Qing Wang, Hao Xu, Di Zhang, Mei Zhang, Yun Chinese Minist Educ State Key Lab Innovat & Transformat Luobing Theory Jinan 250012 Peoples R China Chinese Minist Educ Chinese Natl Hlth Commiss Key Lab Cardiovasc Remodeling & Funct Res Jinan 250012 Peoples R China Chinese Acad Med Sci Jinan 250012 Peoples R China Shandong Univ Dept Cardiol Qilu Hosp Jinan 250012 Peoples R China Shandong Univ Qingdao Dept Cardiol Qilu Hosp Qingdao 266000 Peoples R China Sichuan Univ West China Hosp Dept Ultrasonog Chengdu 610041 Peoples R China Jinan Univ Shenzhen Peoples Hosp Dept Ultrasonog Clin Med Coll 2 Shenzhen 518020 Peoples R China Elect Sci & Technol Univ China Affiliated Sichuan Prov Peoples Hosp Dept Ultrasonog Chengdu 610072 Peoples R China Peking Univ Dept Cardiol Peoples Hosp Beijing 100044 Peoples R China Henan Prov Peoples Hosp Dept Ultrasonog Zhengzhou 463599 Peoples R China Harbin Med Univ Dept Cardiol Affiliated Hosp 1 Harbin 150007 Peoples R China China Med Univ Dept Echocardiol Affiliated Hosp 1 Shenyang 110001 Peoples R China Fudan Univ Zhongshan Hosp Dept Echocardiol Shanghai 200032 Peoples R China Capital Med Univ Beijing Anzhen Hosp Dept Echocardiol Beijing 100029 Peoples R China Sun Yat Sen Univ Sun Yat Sen Mem Hosp Dept Cardiol Guangzhou 510120 Peoples R China Southwest Hosp AMU Dept Ultrasonog Chongqing 400038 Peoples R China China Med Univ Dept Ultrasonog Shengjing Hosp Shenyang 110136 Peoples R China Jilin Univ Dept Ultrasonog China Japan Union Hosp Changchun 130033 Peoples R China Shihezi Univ Affiliated Hosp 1 Sch Med Dept Ultrasonog Shihezi 832000 Peoples R China Guangxi Med Univ Dept Ultrasonog Affiliated Hosp 1 Nanning 537406 Peoples R China Hebei Med Univ Dept Echocardiol Hosp 2 Shijiazhuang 050061 Peoples R China Xinjiang Med Univ Dept Ultrasonog Affiliated Hosp 1 Urumqi 830054 Peoples R China Harbin Med Univ Dept Ultrasonog Affiliated Hosp 2 Harbin 150088 Peoples R China Air Force Med Univ PLA Dept Ultrasonog Tangdu Hosp Xian 710038 Peoples R China

Current guidelines encourage large studies in a diverse population to establish normal reference ranges for three-dimensional (3D) echocardiography for different ethnic groups. This study was designed to establish the normal values of 3D-left ventricular (LV) and left atrial (LA) volume and function in a nationwide, population-based cohort of healthy Han Chinese adults. A total of 1117 healthy volunteers aged 18-89 years were enrolled from 28 collaborating laboratories in China. Two sets of 3D echocardiographic instruments were used, and full-volume echocardiographic images were recorded and transmitted to a core laboratory for image analysis with a vendor-independent off-line workstation. Finally, 866 volunteers (mean age of 48.4 years, 402 men) were qualified for final analysis. Most parameters exhibited substantial differences between different sex and age groups, even after indexation by body surface area. The normal ranges of 3D-LV and 3D-LA volume and function differed from those recommended by the American Society of Echocardiography and the European Association of Cardiovascular Imaging guidelines, presented by the World Alliance Societies of Echocardiography (WASE) study, and from the 2D values in the EMINCA study. The normal reference values of 3D echocardiography-derived LV and LA volume and function were established for the first time in healthy Han Chinese adults. Normal ranges of 3D-LV and 3D-LA echocardiographic measurements stratified with sex, age, and race should be recommended for clinical applications.

关键词： three-dimensional echocardiography left ventricle left atrium normal reference values Chinese adults NORMAL VALUES EUROPEAN ASSOCIATION AMERICAN SOCIETY REFERENCE RANGES QUANTIFICATION NATIONWIDE CONSENSUS

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经食管超声联合斑点追踪技术对房颤射频消融术后复发的预测研究

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中国超声医学杂志 2024年第2期40卷 157-160页

作者：王靖云刘楠楠梁明孙薇丁明岩孙丹丹中国人民解放军北部战区总医院全军心血管病研究所辽宁省人民医院心功能科

目的应用经食管超声联合斑点追踪成像技术评估房颤患者射频消融术后复发的预测研究。方法初次行经导管射频消融术的阵发性房颤(PAF)患者269例，按临床随访结果分为复发组79例、成功组190例。应用经食管超声(TEE)测量左心耳血流速度(LA... 详细信息

目的应用经食管超声联合斑点追踪成像技术评估房颤患者射频消融术后复发的预测研究。方法初次行经导管射频消融术的阵发性房颤(PAF)患者269例，按临床随访结果分为复发组79例、成功组190例。应用经食管超声(TEE)测量左心耳血流速度(LAA-v),常规测量左心房前后径(LAD)、左心房容积指数(LAVI)及CAAP-AF评分，二维斑点追踪成像技术(2D-STI)测量左心房储器期应变(LASr)、左心房管道期应变(LAScd)、左心房泵期应变(LASct),比较各参数与复发的相关性。结果 Logistic回归分析提示左心房储器期应变、左心耳血流速度是阵发性房颤预测射频消融术后复发的敏感指标。结论超声参数可以多指标联合筛选术后易复发的患者，为临床治疗提供参考降低手术复发率。

关键词：心房颤动射频消融术超声心动图复发

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四维左房定量分析技术评价隐匿性未控制高血压患者左房结构和功能的临床价值

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临床超声医学杂志 2024年第8期26卷 684-689页

作者：李颖孙雪纯赵含章李静张慧慧丁明岩辽宁省人民医院心功能科沈阳市110016

目的探讨四维左房定量分析技术(4D-Auto-LAQ)评价隐匿性未控制高血压(MUHT)患者左房结构和功能的临床应用价值。方法选取于我院行24 h动态血压监测的隐匿性高血压患者71例,其中MUHT者34例(MUHT组),血压控制良好者37例(WCHT组)。应用常... 详细信息

目的探讨四维左房定量分析技术(4D-Auto-LAQ)评价隐匿性未控制高血压(MUHT)患者左房结构和功能的临床应用价值。方法选取于我院行24 h动态血压监测的隐匿性高血压患者71例,其中MUHT者34例(MUHT组),血压控制良好者37例(WCHT组)。应用常规超声心动图获取左房内径(LAD)、室间隔厚度(IVST)、左室后壁厚度(LVPWT)、左室舒张末容积(LVEDV)、左室射血分数(LVEF)、二尖瓣口舒张早期和晚期血流速度(E和A)、左室侧壁运动速度(Lat e’)及室间隔运动速度(Sep e’),计算Lat e’和Sep e’的平均值(e’)和E/e’;4D-Auto-LAQ获取左房容积参数和左房应变参数,其中左房容积参数包括左房最大容积指数(LAVImax)、左房收缩前容积指数(LAVIpreA)、左房最小容积指数(LAVImin)、左房总射血分数(LAEF)、左房被动射血分数(LApEF)、左房主动射血分数(LAaEF),左房应变参数包括左房储备期应变(LASr)、左房管道期应变(LAScd)、左房收缩期应变(LASct);比较两组上述各参数的差异;分析LASr、LAScd、LASct与E/e’的相关性。结果与WCHT组比较,MUHT组Lat e’、Sep e’、e’均减低,E/e’增加,差异均有统计学意义(均P<0.05);两组LAD、IVST、LVPWT、LVEDV、LVEF、E、A比较差异均无统计学意义。与WCHT组比较,MUHT组LAVImax、LAVIpreA、LAVImin、LAaEF均增加,LApEF、LASr、LAScd、LASct均减低,差异均有统计学意义(均P<0.05)。相关性分析显示,LASr与E/e’呈正相关(r=0.393,P<0.001),LAScd、LASct与E/e’均无明显相关性。结论4D-Auto-LAQ可早期发现MUHT患者左房结构和功能变化,具有一定的临床应用价值。

关键词：超声心动描记术四维左房定量分析技术隐匿性未控制高血压心房功能,左

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基于模糊系统知识模型的脉冲惰性气体钨极保护焊静态模型建立

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上海交通大学学报 2016年第12期50卷 1873-1876页

作者：丁鸣艳聂冰李文上海交通大学材料科学与工程学院上海200240 大连交通大学电气信息学院辽宁大连116028

基于知识模型、复合关系、范畴及确切度等概念,分析与建立了脉冲惰性气体保护钨极电弧(TIG)平板堆焊背面熔宽静态知识模型,进行了焊接参数对背面熔池宽度影响的定量计算和定性分析,建立了输入空间筛选后的背面熔宽一致静态知识模型KM*.... 详细信息

基于知识模型、复合关系、范畴及确切度等概念,分析与建立了脉冲惰性气体保护钨极电弧(TIG)平板堆焊背面熔宽静态知识模型,进行了焊接参数对背面熔池宽度影响的定量计算和定性分析,建立了输入空间筛选后的背面熔宽一致静态知识模型KM*.结果表明,模糊系统的静态知识模型适合在不精确、不完整和不一致数据中发现知识和提取规则.

关键词：模糊系统知识模型脉冲惰性气体钨极保护焊静态模型

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深圳市盐田海滨栈道碧道区域鸟类资源初步调查

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绿色科技 2024年第16期26卷 59-64页

作者：赵一阳肖嘉杰林石狮黄丹丹梁晓彤罗连丁明艳李远航广东省野生动物监测救护中心广东环境保护工程职业学院顺德职业技术学院

鸟类多样性研究是我国自然保护区保护工作的重要组成部分，也是实现可持续发展的重要工作之一。2021年5-9月，鸟类抽样调查采用固定距离样线法和固定半径样点法，调查了深圳市盐田滨海栈道碧道区域鸟类，共记录到鸟类15目36科76种，其... 详细信息

鸟类多样性研究是我国自然保护区保护工作的重要组成部分，也是实现可持续发展的重要工作之一。2021年5-9月，鸟类抽样调查采用固定距离样线法和固定半径样点法，调查了深圳市盐田滨海栈道碧道区域鸟类，共记录到鸟类15目36科76种，其中国家二级重点保护鸟类12种，CITES附录Ⅱ鸟类8种，国家“三有”保护鸟类54种。盐田滨海栈道碧道区域丰富的鸟类资源是自然资源的有机组成部分，其生存与发展维系着生态系统的平衡与稳定，影响着人类社会的生存和发展。建议结合鸟类生境建设、生态景观提升等工作，开展鸟类多样性保护工作。

关键词：鸟类资源多样性保护滨海栈道深圳市

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Minimal Legendrian surfaces in the tangent sphere bundle of R3

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Science China Mathematics 2024年第11期67卷 2607-2628页

作者： mingyan Li Guofang Wang School of Mathematical Sciences Ocean University of China Mathematisches Institut Albert-Ludwigs-Universit?t Freiburg

In this paper,we study minimal Legendrian surfaces Σ immersed in the tangent sphere bundle *** classify(1) totally geodesic Legendrian surfaces,(2) closed minimal Legendrian surfaces of genus smaller than or equal to 1 and complete minimal Legendrian surfaces with the non-negative Gauss curvature,and(3) complete stable minimal Legendrian surfaces.

关键词： 53C24 53C42 classification Legendrian surface stable minimal surface tangent sphere bundle

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Eutrophication of Jiangsu Coastal Water and Its Role in the Formation of Green Tide

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Journal of Ocean University of China 2024年第1期23卷 109-118页

作者： XIAO mingyan SONG Weina ZHANG Haibo SHI Xiaoyong SU Rongguo Key Laboratory of Marine Chemistry Theory and Technology Ministry of EducationOcean University of ChinaQingdao 266100China National Marine Environmental Monitoring Center Dalian 116000China National Marine Hazard Mitigation Service Beijing 100194China

Since 2007,the large-scale green tide caused by Ulva prolifera(***)have occurred as a recurrent phenomenon in the southern Yellow Sea of *** surveys and satellite remote sensing showed that the small scattered patches of green tide algae were first observed along the Porphyra agriculture area of the Subei Shoal in late *** this study,we attempted to identify the role of eutrophication in the origin of the green tide in the Subei Shoal and its adjacent *** Shoal and its adjacent area are characterized by rich nutrients,especially NO_(3)^(-)-N,NH_(4)^(+)-N,PO_(4)^(3-)-P,and other bioavailable components(such as urea-N and amino acids).In the spring of 2017,the average concentrations of NO_(3)^(-)-N were 19.01±11.01μmolL^(-1),accounting for 86.68%of the dis-solved inorganic nitrogen(DIN).In addition,the average concentration of NH4^(+)-N was 2.51±1.60μmolL^(-1).PO_(4)^(3-)-P had an average concentration of 0.14±0.13μ*** average concentrations of urea-N and total hydrolyzed amino acids(THAA)were 1.73±1.36μmolL^(-1)and 1.33±0.80μmolL^(-1),*** nutritive substances play a key role in the rapid production of *** and make the Jiangsu coastal water an incubator for green tide.

关键词： green tide nutrients algae Ulva prolifera eutrophication Subei Shoal

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Minimal Legendrian surfaces in the tangent sphere bundle of ■

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Science China Mathematics 2024年

作者： mingyan Li Guofang Wang School of Mathematical Sciences Ocean University of China Mathematisches Institut Albert-Ludwigs-Universit?t Freiburg

In this paper, we study minimal Legendrian surfaces Σ immersed in the tangent sphere bundle T1■3. We classify（1） totally geodesic Legendrian surfaces,（2） closed minimal Legendrian surfaces of genus smaller than or equal to 1 and complete minimal Legendrian surfaces with the non-negative Gauss curvature,and（3） complete stable minimal Legendrian surfaces.

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Natural vibration and critical velocity of translating Timoshenko beam with non-homogeneous boundaries

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Applied Mathematics and Mechanics(English Edition) 2024年第9期45卷 1523-1538页

作者： Yanan LI Jieyu ding Hu ding Liqun CHEN Shanghai Institute of Applied Mathematics and Mechanics Shanghai Key Laboratory of Mechanics in Energy EngineeringShanghai Frontier Science Center of MechanoinformaticsSchool of Mechanics and Engineering ScienceShanghai UniversityShanghai 200072China School of Mathematics and Statistics Qingdao UniversityQingdao 266071Shandong ProvinceChina

In most practical engineering applications,the translating belt wraps around two fixed *** boundary conditions of the dynamic model are typically specified as simply supported or fixed *** this paper,non-homogeneous boundaries are introduced by the support *** the translating belt as the mechanical prototype,the vibration characteristics of translating Timoshenko beam models with nonhomogeneous boundaries are investigated for the first *** governing equations of Timoshenko beam are deduced by employing the generalized Hamilton's *** effects of parameters such as the radius of wheel and the length of belt on vibration characteristics including the equilibrium deformations,critical velocities,natural frequencies,and modes,are numerically calculated and *** numerical results indicate that the beam experiences deformation characterized by varying curvatures near the *** radii of the wheels play a pivotal role in determining the change in trend of the relative difference between two beam *** the results unearths that the relative difference in equilibrium deformations between the two beam models is more pronounced with smaller-sized *** the two wheels are of equal size,the critical velocities of both beam models reach their respective *** addition,the relative difference in natural frequencies between the two beam models exhibits nonlinear variation and can easily exceed 50%.Furthermore,as the axial velocities increase,the impact of non-homogeneous boundaries on modal shape of translating beam becomes more *** dealing with non-homogeneous boundaries is challenging,beam models with non-homogeneous boundaries are more sensitive to parameters,and the differences between the two types of beams undergo some interesting variations under the influence of non-homogeneous boundaries.

关键词： translating beam Timoshenko beam non-homogeneous boundary natural frequency critical velocity

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Whittle’s Index Based Sensor Scheduling for Multiprocess Systems Under DoS Attacks

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Journal of Systems Science & Complexity 2024年第1期37卷 329-350页

作者： CAI Zai ding Kemi Shenzhen Key Laboratory of Control Theory and Intelligent Systems Southern University of Science and TechnologyShenzhen 518055China.

In this paper,the authors consider how to design defensive countermeasures against DoS attacks for remote state estimation of multiprocess *** each system,a sensor will measure its state and transmits the data packets through an unreliable channel which is vulnerable to be jammed by an *** limited communication bandwidth,only a subset of sensors are allowed for data transmission,and how to select the optimal one to maximize the accuracy of remote state estimation is the focus of the proposed *** authors first formulate this problem as a Markov decision process and investigate the existence of optimal ***,the authors demonstrate the piecewise monotonicity structure of optimal *** the difficulty of obtaining an optimal policy of large-scale problems,the authors develop a suboptimal heuristic policy based on the aforementioned policy structure and Whittle’s ***,a closed form of the indices is derived in order to reduce implementation complexity of proposed scheduling policy and numerical examples are provided to illustrate the proposed developed results.

关键词： DoS attacks Kalman filter remote state estimation Whittle’s index.

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