检索结果-南通市图书馆

Signal Transduction and Targeted Therapy 2023年第9期8卷 3880-3882页

作者： Yaw Asare Christian stoppe j.rgen Bernhagen Institute for Stroke and Dementia research(ISD) Klinikum der Universität München(KUM)Ludwig-Maximilian-University(LMU)81377 MunichGermany Department of Anesthesiology Intensive CareEmergency and Pain MedicineUniversity Hospital Würzburg97080 WürzburgGermany Department of Cardiac Anesthesiology and Intensive Care Medicine German Heart Center CharitéBerlin13353 BerlinGermany Munich Cluster for Systems Neurology 81377 MunichGermany Munich Heart Alliance 80802 MunichGermany

In a recent study published in Nature Genetics,1 Han and colleagues employed a dual genetic lineage tracing approach in combination with a model of heart failure(HF)to identify a key sub-population of endocardium-derived fibroblasts,which gives rise to excessive myofibroblast formation in a Wnt pathway-mediated manner and contributes to cardiac fibrosis.1 The identified fibroblast sub-population and Wnt signaling pathway could be novel targets for the therapy of *** in risk management and cardiovascular inter-vention have significantly reduced age-specific cardiovascular disease-related *** contrast,the rate of HF-related hospitalisations has increased over the past decades and HF is a disease with highest social and economic cost in industrialized *** is defined as impairment of the heart’s blood pumping function and its severity is assessed based on ej.ction *** often occurs after myocardial infarction(MI),with infarct size and quality of ventricular remodeling after MI influencing ventricular *** of HF also include hypertension,atrial fibrillation,and cardiomyopathies(Fig.1).Especially elderly patients with recurrent MI and comorbidities are increasingly presenting with signs of HF.

关键词： cardiovascular ventricular mortality

An Improved ICCG Method of Large-Scale Sparse Linear Equation Group

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

An Improved ICCG Method of Large-Scale Sparse Linear Equatio...

Dielectric and infrared properties of SrTiO_3 single crystal doped by 3d (V,Mn,Fe,Ni) and 4f (Nd,Sm,Er) ions

The 10th EPMESC

作者： Y. j. Zhang * Q. Sun School of Aeronautics Northwestern Polytechnical University Xi’an 710072 China

Coefficient matrix of linear equations from finite element method (FEM) is sparse and symmetrical. For the sake of CPU operational time saving to accesses data in matrix decomposition and reducing sto

关键词： large-scale sparse linear equation group fully sparse strategy improved ICCG method.

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Chinese Physics B 2014年第2期23卷 369-374页

作者： S.Maletic D.Maletic I.Petronij.vic j.Doj.ilovic D.M.Popovic Faculty of Physics University of Belgrade Institute of Physics University of Belgrade

In this study, the effects of doping by 3d （V, Mn, Fe, Ni） and 4f （Nd, Sm, Er） ions on dielectric and infrared properties of SrTiO3 （sto） single crystals are investigated. It is well known that doping of the SrTiO3 can change the dielectric properties of the sto from an insulator to an n-type semiconductor, and even to a metallic conductor. Dielectric and infrared （Ir） properties of the undoped sto and doped sto single crystals are analyzed using dielectric spectroscopy （80 kHz-5 MHz）, transmission （200 cm^-1-4000 cm^-1）, and reflection spectroscopy （50 cm^-1-2000 cm^-1）. It is found that doping by the 3d ions reduces the value of dielectric permittivity, but the trend of temperature dependence of the dielectric permittivity remains almost unchanged. On the other hand, dielectric spectroscopy measurements for samples doped by 4f ions show the anomalous behaviors of the dielectric permittivity at temperatures around the temperature of the structural phase transition. There are two fractures of temperature dependences of inverse dielectric permittivity εr^-1 （T）. Transmittance spectroscopy measurements show that there are differences in the shape of the spectrum in the mid-Ir region between the undoped sto and the one doped by 4f ions. The differences in the reflectance spectrum between the sto：Nd and sto are analyzed in detail.

关键词： doping dielectric properties phase transitions infrared spectroscopy

维普期刊数据库

Laparoscopic surgery for benign and malign diseases of the digestive system:Indications,limitations,and evidence

在线全文

学校读者我要写书评

暂无评论

World j.urnal of Gastroenterology 2014年第17期20卷 4883-4891页

作者： Markus Alexander Küper Friederike Eisner Alfred K?nigsrainer j.rg Glatzle Department for General and Visceral Surgery Bundeswehr Hospital BerlinD-10115 BerlinGermany Department for General Visceral and Transplant SurgeryUniversity Hospital Tübingen72076 TübingenGermany

The laparoscopic technique was introduced in gastrointestinal surgery in the mid 1980s. Since then, the development of this technique has been extraordinary. Triggered by technical innovations (stapling devices or coagulation/dissecting devices), nowadays any type of gastrointestinal resection has been successfully performed laparoscopically and can be performed laparoscopically dependent on the patient’s condition. This summary gives an overview over 30 years of laparoscopic surgery with focus on today’s indications and evidence. Main indications remain the more common procedures, e.g., appendectomy, cholecystectomy, bariatric procedures or colorectal resections. For all these indications, the laparoscopic approach has become the gold standard with less perioperative morbidity. regarding oncological outcome there have been several high-quality randomized controlled trials which demonstrated equivalency between laparoscopic and open colorectal resections. Less common procedures like esophagectomy, oncological gastrectomy, liver and pancreatic resections can be performed successfully as well by an experienced surgeon. However, the evidence for these special indications is poor and a general recommendation cannot be given. In conclusion, laparoscopic surgery has revolutionized the field of gastrointestinal surgery by reducing perioperative morbidity without disregarding surgical principles especially in oncological surgery.

关键词： Laparoscopy Gastrointestinal surgery Esophagus stomach Cholecystectomy Colorectal surgery Liver resection Pancreas resection Laparoscopic resection of gastrointestinal

A Cell-Based Smoothed Finite Element Method for Modal Analysis of Non-Woven Fabrics

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

Computers, Materials & Continua 2021年第6期67卷 2765-2795页

作者： Nguyen T.Quyen N.Dourado A.j.P.Gomes F.B.N.Ferreira C2T—Centro de Ciência e Tecnologia Têxtil Departamento de Engenharia TêxtilUniversidade do MinhoCampus de AzurémGuimarães4804-533Portugal CMEMS-UMinho Departamento de Engenharia MecânicaUniversidade do MinhoCampus de AzurémGuimarães4804-533Portugal Department of Computer Science Universidade da Beira InteriorConvento de Sto.AntónioCovilhã6201-001Portugal Instituto de Telecomunicações R.Marquês deÁvila e BolamaCovilhã6201-001Portugal

The combination of a 4-node quadrilateral mixed interpolation of tensorial components element(MITC4)and the cell-based smoothed finite element method(CSFEM)was formulated and implemented in this work for the analysis of free vibration and unidirectional buckling of shell *** formulation was applied to numerous numerical examples of non-woven *** CSFEM schemes do not require coordinate transformation,spurious modes and numerical instabilities are prevented using bilinear quadrilateral element subdivided into two,three and four smoothing *** improvement of the original CSFEM formulation was made regarding the calculation of outward unit normal vectors,which allowed to remove the integral operator in the strain smoothing *** procedure conducted both to the simplification of the developed formulation and the reduction of computational cost.A wide range of values for the thickness-to-length ratio and edge boundary conditions were *** developed numerical model proved to overcome the shear locking phenomenon with success,revealing both reduced implementation effort and computational cost in comparison to the conventional FEM *** cell-based strain smoothing technique used in this work yields accurate results and generally attains higher convergence rate in energy at low computational cost.

关键词： Mindlin-reissner theory of plates shear-locking gradient/strain smoothing technique non-woven fabric

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

全国第四届老年口腔学术研讨会会议纪要

中华口腔医学杂志 2009年第6期44卷 341-342页

作者：中华口腔医学会老年口腔医学专业委员会储冰峰刘洪臣栾文民戴永雨中华口腔医学会老年口腔医学专业委员会

中华口腔医学会老年口腔医学专业委员会换届选举暨全国第四届老年口腔学术研讨会于2008年11月6-8日在江西省南昌市召开。江西省卫生厅副厅长刘富林、南昌大学医学院副书记易敬林等领导到会祝贺。来自全国各地大专院校、综合医院从事老... 详细信息

中华口腔医学会老年口腔医学专业委员会换届选举暨全国第四届老年口腔学术研讨会于2008年11月6-8日在江西省南昌市召开。江西省卫生厅副厅长刘富林、南昌大学医学院副书记易敬林等领导到会祝贺。来自全国各地大专院校、综合医院从事老年口腔医疗、教学、科研工作的104名代表参加了会议。

关键词：中华口腔医学会学术研讨会老年医学专业委员会卫生厅副厅长换届选举大专院校口腔医疗

维普期刊数据库

Possible abnormal mechanism for lattice strain relaxation in La0.7Ca0.3MnO3 thin film

在线全文

学校读者我要写书评

暂无评论

Possible abnormal mechanism for lattice strain relaxation in...

高稳定性Tl2Ba2CaCu2Ox薄膜DC-SQUID

Ⅻ International Symposium on Small Particles and Inorganic Clusters

作者： W.S.Tan H.L.Cai X.S.Wu S.S.j.ang Q.j.j.a j.GaoDepartment of Applied Physics Nanj.ng University of Science and Technology Nanj.ng210094 P.r.China National Laboratory of Solid State Microstructures Department of Physics Nanj.ngUniversity Nanj.ng 210093 P.r.China Institute of High Energy Physics Chinese Academy of Science Beij.ng 100039 P.r.China Department of Physics HongKong University HongKong Pr.China

＜正＞ By the method of 90°off-axis radio frequency magnetron sputtering, La0.7Ca0.3MnO3 （LCMO） thin films with the thickness of 500 A were deposited on （001）-oriented single crystal substrates including SrTi03（sto）, MgO and sapphire（α-Al2O3, ALO）. Normal X-ray diffraction indicated high crystal qualities and well c-axis-orientation of samples LCMO/sto and LCMO/MgO, whereas LCMO/ALO film was polycrystalline. Grazing incidence X-ray

关键词： La0.7Ca0.3MnO3 film Grazing incidence X-ray diffraction Strain relaxation In-plane lattice parameter

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

低温物理学报 1999年第4期21卷 57-60页

作者：王晶韩冰徐凤枝赵士平陈赓华杨乾声阎少林方兰何明路荣涛中科院物理所凝聚态物理中心南开大学电子科学系

与ＹＢＣＯ薄膜相比，Ｔｌ２Ｂａ２ＣａＣｕ２Ｏｘ薄膜具有更高的Ｔｃ和更好的抗湿性能，所以Ｔｌ２Ｂａ２ＣａＣｕ２Ｏｘ薄膜器件不仅在液氮温度下具有更好的稳定性，而且在室温下具有更长的存放寿命．我们用磁控溅射的方法分别在２４... 详细信息

与ＹＢＣＯ薄膜相比，Ｔｌ２Ｂａ２ＣａＣｕ２Ｏｘ薄膜具有更高的Ｔｃ和更好的抗湿性能，所以Ｔｌ２Ｂａ２ＣａＣｕ２Ｏｘ薄膜器件不仅在液氮温度下具有更好的稳定性，而且在室温下具有更长的存放寿命．我们用磁控溅射的方法分别在２４°和３６．８°的ＳＴＯ双晶衬底上外延出Ｔｌ２Ｂａ２ＣａＣｕ２Ｏｘ薄膜并制备成晶界结ＤＣＳＱＵＩＤ，比较了二者由于晶界夹角不同而产生的性能差异，并给出可工作在９５Ｋ的ＤＣＳＱＵＩＤ干涉曲线；对工作在７７Ｋ的Ｔｌ２Ｂａ２ＣａＣｕ２Ｏｘ和ＹＢＣＯ薄膜双晶ＤＣＳＱＵＩＤ，比较了二者在噪声特性及临界电流和结电阻随温度变化等特性，并对结果作了讨论

关键词： DC-SQUID Tl2Ba2CaCu2Ox 双晶结

ATHYS模型及其在巢湖流域丰乐河水文过程模拟中的应用

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

安徽农业大学学报 2014年第6期41卷 1061-1069页

作者：郑珊珊 Perrin j.L 储茵马友华 Salles C Tournoud M G 安徽农业大学资源与环境学院合肥230036 Université Montpellier 2. HydroSciences Montpellier(UMr 5569) France

以巢湖典型支流丰乐河流域为例,利用分布式水文模型ATHYS对流域降雨—径流过程进行模拟,以期为丰乐河流域水土保持、防洪、水资源利用和非点源污染防治等提供科学依据。ATHYS模型将流域分为大小相同的空间小单元,以库模型进行产流计算,... 详细信息

以巢湖典型支流丰乐河流域为例,利用分布式水文模型ATHYS对流域降雨—径流过程进行模拟,以期为丰乐河流域水土保持、防洪、水资源利用和非点源污染防治等提供科学依据。ATHYS模型将流域分为大小相同的空间小单元,以库模型进行产流计算,以滞后演算法(lag and route)方法进行汇流计算,并以Nash and Sutcliffe指数作为检验模拟结果的标准,模拟流域出口断面日径流量,初步分析流域径流实测值与模拟值的年际变化。模型模拟结果表明,在率定期和验证期模拟与实测径流量的总Nash and Sutcliffe值(Nash值)都可以达到0.80以上,相关系数均可达0.89以上。除了部分峰值和基流,模型能较好地模拟丰乐河的径流过程。模型模拟径流总量的相对误差在率定期为23.1%,验证期为34.6%。流域降雨量、径流量的年内、年际变化均比较明显,径流实测值和模拟值的年际变化也都比较大。综合来看,模型比较适用于所研究流域的日径流模拟。

关键词：降雨径流水文模拟 ATHYS模型丰乐河流域

维普期刊数据库