检索结果-南通市图书馆

Relationship between longitudinal changes in lipid composition and ischemic stroke among hypertensive patients

World Journal of Clinical Cases 2025年第4期13卷 18-27页

作者： cheng-cheng Wei Yu-Qing Huang cheng-hong Yu Department of Cardiology Tongxiang First People's HospitalTongxiang 314500Zhejiang ProvinceChina Department of Cardiology Guangdong Cardiovascular InstituteGuangzhou 510080Guangdong ProvinceChina

BACKGROUND Dyslipidemia was strongly linked to stroke,however the relationship between dyslipidemia and its components and ischemic stroke remained *** To investigate the link between longitudinal changes in lipid profiles and dyslipidemia and ischemic stroke in a hypertensive *** Between 2013 and 2014,6094 hypertension individuals were included in this,and ischemic stroke cases were documented to the end of *** changes of lipid were stratified into four groups:(1)Normal was transformed into normal group;(2)Abnormal was transformed into normal group;(3)Normal was transformed into abnormal group;and(4)Abnormal was transformed into abnormal *** examine the link between longitudinal changes in dyslipidemia along with its components and the risk of ischemic stroke,we utilized multivariate Cox proportional hazards models with hazard ratio(HR)and 95%*** The average age of the participants was 62.32 years±13.00 years,with 329 women making up 54.0%of the *** the course of a mean follow-up of 4.8 years,143 ischemic strokes *** normal was transformed into normal group was used as a reference,after full adjustments,the HR for dyslipidemia and ischemic stroke among abnormal was transformed into normal group,normal was transformed into abnormal group and abnormal was transformed into abnormal Wei CC et *** changed and ischemic stroke WJCC https://*** 2 February 6,2025 Volume 13 Issue 4 group were 1.089(95%CI:0.598-1.982;P=0.779),2.369(95%CI:1.424-3.941;P<0.001)and 1.448(95%CI:1.002-2.298;P=0.047)(P for trend was 0.233),*** In individuals with hypertension,longitudinal shifts from normal to abnormal in dyslipidemia-particularly in total and low-density lipoprotein cholesterol-were significantly associated with the risk of ischemic stroke.

关键词： Longitudinal change Hypertension Dyslipidemia Lipid profile Ischemic stroke

来源：

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

教学的文化实践属性及三个基本认识向度

引用

新疆师范大学学报（哲学社会科学版） 2025年第2期46卷 137-143页

作者：程良宏王芸新疆师范大学教育科学学院新疆高等教育发展研究中心新疆乌鲁木齐830017

教学不仅是知识传递行为,而且是具有文化交往和文化生产属性的实践活动。文本认为,从教学目的、教学主体和教学内容入手探析教学在知识传递传承背后的文化实践特质,是理解教学具有文化交往和文化生产属性的三个基本认识向度。因此,要深... 详细信息

教学不仅是知识传递行为,而且是具有文化交往和文化生产属性的实践活动。文本认为,从教学目的、教学主体和教学内容入手探析教学在知识传递传承背后的文化实践特质,是理解教学具有文化交往和文化生产属性的三个基本认识向度。因此,要深入体认教学作为一种特殊的文化交往和生产实践形态,明晰以文化人、以文育人的导引和践行为目的指引,以教师与学生为文化交往和文化生产的实践主体,以教学过程中对教材与师生文化的理解再造为文化实践的基本内容。

关键词：教学实践教学的文化属性文化生产

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Elastic wave insulation and propagation control based on the programmable curved-beam periodic structure

引用

Applied Mathematics and Mechanics(English Edition) 2024年第10期45卷 1791-1806页

作者： Jiajia MAO hong cheng Tianxue MA Beijing Key Laboratory of Nonlinear Vibrations and Strength of Mechanical Structures Department of MechanicsSchool of MathematicsStatistics and MechanicsBeijing University of TechnologyBeijing 100124China Department of Mechanics School of Physical Science and EngineeringBeijing Jiaotong UniversityBeijing 100044China

Curved-beams can be used to design modular multistable metamaterials(MMMs)with reprogrammable material properties,i.e.,programmable curved-beam periodic structure(PCBPS),which is promising for controlling the elastic wave *** PCBPS is theoretically equivalent to a spring-oscillator system to investigate the mechanism of bandgap,analyze the wave propagation mechanisms,and further form its geometrical and physical criteria for tuning the elastic wave *** the equivalent model,we calculate the analytical solutions of the dispersion relations to demonstrate its adjustability,and investigate the wave propagation characteristics through the *** validate the equivalent system,the finite element method(FEM)is *** is revealed that the bandgaps of the PCBPS can be turned on-and-off and shifted by varying its physical and geometrical *** findings are highly promising for advancing the practical application of periodic structures in wave insulation and propagation control.

关键词： curved-beam based periodic structure equivalent stiffness spring-oscillator system dispersion relation wave propagation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Drag reduction and flow structures of wing tip sails in ground effect

引用

Journal of Hydrodynamics 2020年第1期32卷 93-106页

作者： Jian-xun Zhou cheng-hong Sun Daichin Shanghai Institute of Applied Mathematics and Mechanics Shanghai UniversityShanghai 200072China Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai UniversityShanghai 200072China

The hydrodynamics and flow structures of a base wing slotted with tip sails in proximity to the ground were studied experimentally in order to investigate the flow control efficiency of wing tip sails in ground *** experiment was conducted in a towing tank at a Reynolds number 1.5×10^*** lift and drag forces were measured by a transducer,the velocity fields of the wing tip vortices were measured using a time-resolved particle image velocimetry system(TR-PIV).The tip-sails and ground clearance were both effective in reducing the total drag,the lift coefficients of the tip-sails wings were increased as compared with that of a base *** lift-drag ratios of the tip-sails wings were improved obviously in a range of angles of attack from 2°to stalling *** tip-sails played more important role in unwinding the concentrated wing tip vortices at higher angle of attack,the intensity of the tip vortices were much weaker than that of the base *** development of the wing tip vortices was suppressed as well due to the inhibition of the ground,the downwash speed was reduced and the induced drag was decreased.

关键词： Wing tip-sails ground effect lift/drag force vorticity distribution induced drag reduction

来源：

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

Synthesis and Mesophase Properties of Intraanular Functionized Shape-persistent Macrocycles Containing Dibenzo[fg,op]naphthacenes

引用

Chemical Research in Chinese Universities 2007年第1期23卷 35-43页

作者： cheng Xiao-hong HOEGER Sigurd Key Laboratory of Medicinal Chemistry for Natural Resource Ministry of Education School of Chemistry and Material Engineering Yunnan University Kunming 650091 P. R. China University Karlsruhe Institute for Technic Chemistry and Polymer Chemistry Engesserstr. 18 76131 Karlsruhe Germany

On the basis of the C-C coupling reactions of dibenzo [ fg, op ] naphthacene bistriflate, which was obtained by the condensation of phenylacetates with 4-aryl-2,6-bis（2-bromo-4-methoxy-phenyl） pyrylium salts followed by palladium-catalyzed dehydrohalogenation, three shape-persistent macrocycles with dibenzonaphthacene corner pieces, a nanometer interior void, and intraanular oligoalkyl side groups were synthesized by the oxidative cyclization of the corresponding bisacetylenes under high-dilution conditions. Their thermotropic liquid crystalline properties were investigated by using polarizing microscopy and differential scanning calorimetry. All the three compounds showed nematic mesophases and belonged to discotic liquid crystals with inverted topology.

关键词： Dibenzo [ fg, op ] naphthacene Macrocycles Liquid crystal C-C coupling

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Primordial Black Holes and Cosmic String Loop

引用

Chinese Physics Letters 1996年第4期13卷 317-320页

作者： cheng hong-bo LI Xin-zhou East China Institute for Theoretical Physics Shanghai 200237 School of Science East China University of Science and TechnologyShanghai 200237 Department of Physics Shanghai Teacher's UniversityShanghai 200234

The elliptic loop equation of cosniic string is studied in the Minkowski space and during the radiation-dominated era in the Robertson-Walker universe.A remarkable fact about this equation is that a loop may never con... 详细信息

关键词： equation radius circular

来源：

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

Alentiana palinpoda,a new commensal polynoid species from a seamount in the Northwest Pacific Ocean

引用

Acta Oceanologica Sinica 2021年第12期40卷 12-19页

作者： Yueyun Wang hong cheng Chunsheng Wang Second Institute of Oceanography Ministry of Natural ResourcesHangzhou 310012China Key Laboratory of Marine Ecosystem Dynamics Ministry of Natural ResourcesHangzhou 310012China School of Oceanography Shanghai Jiao Tong UniversityShanghai 200030China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519080China

Alentiana has only one member,***(Verrill,1885),commensal with sea anemone(Bolocera tuediae).Here,Alentiana palinpoda ***.,a second member in the genus Alentiana(subfamily Lepidastheniinae),a new commensal polynoid is described,based on a specimen collected from a deep-water seamount in the Northwest Pacific *** new species is characterized by large elytra that completely cover the dorsum and are present in every third segment in the posterior *** are truncated,with two types of neurochaetae;supraacicular chaetae toothed on one side with a slightly inflated end,and subacicular chaetae that are heavy and smooth;the prechaetal lobe is larger than the postchaetal lobe,with the ventral part rolling upward and backward.

关键词： Polynoidae new species systematics taxonomy commensalism

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A new eyeless species of Nicon(Annelida:Nereididae)from the deep Northwest Pacific Ocean

引用

Acta Oceanologica Sinica 2021年第12期40卷 20-26页

A new species of the nereidid annelid,genus Nicon Kinberg,1866,from KIOST Seamount,Northwest Pacific deep water is *** is a genus characterized by lacking paragnaths or papillae on the pharynx and composed of nine species worldwide,distributed from shallow water to deep *** ablepsia *** described is characterized by the lack of eyes on the prostomium,prolonged tentacular cirri reaching to chaetiger6,notochaetae homogomph spinigers,neurochaetae homogomph spinigers and heterogomph *** relationships of Nicon remain undetermined based on molecular *** this study,we constructed molecular Maximum-Likelihood phylogenetic tree from 29 nereidid species based on four marker genes:mitochondrial 16 S rRNA gene and cytochrome c oxidase subunit I(COI)gene;nuclear 18 S rRNA gene and 28 S rRNA *** analysis suggest the Nicon is clustered within Nereidinae,and nereidinae is not recovered as monophyletic.A key to species of Nicon is provided.

关键词： deep sea Nicon new species Gymnonereidinae systematics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A step deformation method for superplasticity improvement of coarse-grained Ti–15V–3Cr-3Sn-3Al

引用

Chinese Journal of Aeronautics 2018年第7期31卷 1619-1624页

作者： cheng-hong ZOU Qing ZHOU Lei WANG College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and Astronautics

Ti–15V–3Cr–3Sn–3Al（Ti–15–3）, a kind of metastable beta titanium which has high specific strength and good cold-formability, is highlighted for applications in the aerospace manufacture industry. However, the technique for improving its formability at elevated temperatures is still a challenge at present. In this work, a step deformation method is proposed for superplasticity improvement of coarse grained Ti–15–3 plates at temperatures around its beta transus. The effects of the strain rate and the strain at the first stage on the superplasticity are investigated. The results show an increase of the strain rate sensitivity and a decrease of the flow stress under the step deformation mode compared to those obtained under constant strain rates at 780℃. The maximum strain to failure obtained in the step mode is 93% higher than that deformed in the constant strain rate mode. Strain rates, strains at the first stage, and temperatures have influences on the superplasticity improvement. The deformation mechanism is concluded as subgrain formation accommodated by grain boundary sliding rate-controlled by dislocation climb. The improved m value in the step deformation is accounted to the extra dislocation density produced during the strain rate reduction.

关键词： Dynamic recrystatlization Strain rate sensitivity Subgrain Superplasticity Titanium alloy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A tensor model for liquid crystals on a spherical surface

引用

Science China Mathematics 2013年第12期56卷 2549-2559页

作者： cheng hong ZHANG PingWen School of Mathematical Sciences Peking University

Rod-like molecules confined on a spherical surface can organize themselves into nematic liquid crystal phases. This can give rise to novel textures displayed on the surface, which has been observed in experiments. An important theoretical question is how to find and predict these textures. Mathematically, a stable configuration of the nematic fluid corresponds to a local minimum in the free energy landscape. By applying Taylor expansion and Bingham approximation to a general molecular model, we obtain a closed-form tensor model, which gives a free energy form that is different from the classic Landau-de Gennes model. Based on the tensor model, we implement an efficient numerical algorithm to locate the local minimum of the free energy. Our model successfully predicts the splay, tennis-ball and rectangle textures. Among them, the tennis-ball configuration has the lowest free energy.

关键词： liquid crystal nematic texture Bingham closure approximation tennis-ball configuration

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：