检索结果-南通市图书馆

Video-assisted bystander cardiopulmonary resuscitation improves the quality of chest compressions during simulated cardiac arrests: A systemic review and meta-analysis

引用

World Journal of Clinical Cases 2022年第31期10卷 11442-11453页

作者： Dong-feng Pan Zheng-Jun Li Xin-Zhong Ji Li-Ting Yang pei-feng liang Department of Emergency Medicine The First Affiliated Hospital of Northwest Minzu UniversityPeople’s Hospital of Ningxia Hui Autonomous RegionYinchuan 750002Ningxia Hui Autonomous RegionChina Department of Emergency Medicine People’s Hospital of Ningxia Hui Autonomous RegionYinchuan 750002Ningxia Hui Autonomous RegionChina Department of Emergency Medicine The Third Clinical Medical College of Ningxia Medical UniversityYinchuan 750002Ningxia Hui Autonomous RegionChina Department of Medicine Statistics People’s Hospital of Ningxia Hui Autonomous RegionYinchuan 750002Ningxia Hui Autonomous RegionChina

BACKGROUND It remains unclear whether video aids can improve the quality of bystander cardiopulmonary resuscitation(CPR).AIM To summarize simulation-based studies aiming at improving bystander CPR associated with the quality of chest compression and time-related quality *** The systematic review was conducted according to the PRISMA *** relevant studies were searched through PubMed,EMBASE,Medline and Cochrane Library *** risk of bias was evaluated using the Cochrane collaboration *** A total of 259 studies were eligible for inclusion,and 6 randomised controlled trial studies were ultimately *** results of meta-analysis indicated that video-assisted CPR(V-CPR)was significantly associated with the improved mean chest compression rate[OR=0.66(0.49-0.82),P<0.001],and the proportion of chest compression with correct hand positioning[OR=1.63(0.71-2.55),P<0.001].However,the difference in mean chest compression depth was not statistically significant[OR=0.18(-0.07-0.42),P=0.15],and V-CPR was not associated with the time to first chest compression compared to telecommunicator CPR[OR=-0.12(-0.88-0.63),P=0.75].CONCLUSION Video real-time guidance by the dispatcher can improve the quality of bystander CPR to a certain ***,the quality is still not ideal,and there is a lack of guidance caused by poor video signal or inadequate interaction.

关键词： Dispatcher-assisted cardiopulmonary resuscitation Video Quality of chest compressions Simulated cardiac arrests

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

Human distribution and spatial-temporal clustering analysis of human brucellosis in China from 2012 to 2016

引用

Infectious Diseases of Poverty 2020年第5期9卷 124-124页

作者： pei-feng liang Yuan Zhao Jian-Hua Zhao Dong-feng Pan Zhong-Qin Guo 不详 Department of Epidemiology and Biostatistics School of Public Health and managementNingxia Medical UniversityYinchuan 750001China

Background:Brucellosis is a major public health issue in China,while its temporal and spatial distribution have not been studied in *** study aims to better understand the epidemiology of brucellosis in the mainland of China,by investigating the human,temporal and spatial distribution and clustering characteristics of the ***:Human brucellosis data from the mainland of China between 2012 and 2016 were obtained from the China Information System for Disease Control and *** spatial autocorrelation analysis of ArcGIS10.6 and the spatial-temporal scanning analysis of SaTScan software were used to identify potential changes in the spatial and temporal distribution of human brucellosis in the mainland of China during the study ***:A total of 244348 human brucellosis cases were reported during the study period of *** average incidence of human brucellosis was higher in the 40-65 age *** temporal clustering analysis showed that the high incidence of brucellosis occurred between March and *** spatial clustering analysis showed that the location of brucellosis clustering in the mainland of China remained relatively fixed,mainly concentrated in most parts of northern *** results of the spatial-temporal clustering analysis showed that Heilongjiang represents a primary clustering area,and the Tibet,Shanxi and Hubei provinces represent three secondary clustering ***:Human brucellosis remains a widespread challenge,particularly in northern *** clustering analysis highlights potential high-risk human groups,time frames and areas,which may require special plans and resources to monitor and control the disease.

关键词： Human brucellosis China Clustering analysis Geographic information system SaTScan software

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

矿山地质灾害治理施工中边坡支护的应用

引用

世界有色金属 2023年第1期 163-165页

作者：冯沛良甘肃省地质矿产开发局第一地质矿产勘查院

边坡支护工程是预防开挖不科学引起的坍塌和滑坡的最有效的措施。合理应用边坡支护工程可以减少矿山边坡的应力变化，避免岩质滑坡产生的危险，从而提高矿山土壤的稳定性。基于此，本文首先分析了矿山地质灾害成因以及在矿山地质灾害治... 详细信息

边坡支护工程是预防开挖不科学引起的坍塌和滑坡的最有效的措施。合理应用边坡支护工程可以减少矿山边坡的应力变化，避免岩质滑坡产生的危险，从而提高矿山土壤的稳定性。基于此，本文首先分析了矿山地质灾害成因以及在矿山地质灾害治理施工中边坡支护的功能，然后剖析了矿山地质灾害整治过程中边坡支护的运用，以期有效维持边坡的稳定性。

关键词：矿山地质灾害治理边坡支护

来源：

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Sky location of massive black hole binaries in the foreground of Galactic white dwarf binaries

引用

Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 97-108页

作者： Pan Guo Hong-Bo Jin Cong-feng Qiao Yue-liang Wu The International Centre for Theoretical Physics Asia-Pacific University of Chinese Academy of Sciences The School of Physical Sciences University of Chinese Academy of Sciences Institute for Frontiers in Astronomy and Astrophysics Beijing Normal University National Astronomical Observatories Chinese Academy of Sciences Institute of Theoretical Physics Chinese Academy of Sciences

For space-based gravitational wave （GW） detection,the main noise source for massive black hole binaries （MBHBs） is attributed to approximately 10～7double white dwarf binaries in the *** a GW source,the amplitude of the detector response,recorded by a space-based gravitational wave detector,exhibits a modulation effect with a year period when observing the source from various orbital *** the adverse conditions mentioned above,where there is a strong foreground noise and annual modulation in the signals,we employed the wavelet transform and the strong-amplitude relevant orbital position search methods,which allows the weak MBHB sources to achieve higher locating *** detail,for two MBHB sources of lower intensity,the precision of luminosity distance,represented by the ratio ?DL/DLat the 95%confidence level,is enhanced by factors of ～*** angular resolutions,denoted by??s,are enhanced by a factor of ～*** improvements increase the number of detectable GW sources,facilitate multi-messenger follow-up observations and provide constraints on the cosmological constant.

关键词： space-based gravitational wave detection gravitational waves massive black hole binaries

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

无人机数据链判决反馈均衡器的FPGA实现

引用

信息与电子工程 2012年第4期10卷 412-415,445页

作者：裴亮锋陈自力军械工程学院光学与电子工程系河北石家庄050003

从无人机数据链的需求出发,使用现场可编程门阵列(FPGA)实现判决反馈均衡器(DFE),以消除无人机数据链中的码间干扰。文中利用System Generator对判决反馈均衡器进行建模,将模型转换为硬件,并通过硬件协调仿真在Xilinx virtex5 XC5VSX50... 详细信息

从无人机数据链的需求出发,使用现场可编程门阵列(FPGA)实现判决反馈均衡器(DFE),以消除无人机数据链中的码间干扰。文中利用System Generator对判决反馈均衡器进行建模,将模型转换为硬件,并通过硬件协调仿真在Xilinx virtex5 XC5VSX50T芯片上验证。仿真结果表明,在不同信道条件下,判决反馈均衡器能很好地克服码间干扰,适用于无人机信道。本文为无人机高速数据链均衡器的实现打下基础。

关键词：判决反馈均衡器无人机数据链现场可编程门阵列 System Generator软件

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

DLMS算法的脉动阵结构设计及FPGA实现

引用

现代电子技术 2012年第17期35卷 47-50页

作者：裴亮锋陈自力军械工程学院河北石家庄050003

为了减小无人机数据链中的码间干扰,适应数据链对传输速度的要求,利用Verilog HDL设计DLMS算法,并在其中加入脉动阵结构,完成了均衡器的高速实现。仿真表明所设计的均衡器的最高频率可达298.063 MHz,这为以后设计更高频率或其他类型的... 详细信息

为了减小无人机数据链中的码间干扰,适应数据链对传输速度的要求,利用Verilog HDL设计DLMS算法,并在其中加入脉动阵结构,完成了均衡器的高速实现。仿真表明所设计的均衡器的最高频率可达298.063 MHz,这为以后设计更高频率或其他类型的高速均衡器指明了方向。

关键词：脉动结构 DLMS 无人机均衡器 FPGA

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

Posttraumatic stress symptoms among Chinese university students during the COVID-19 pandemic:Prevalence,correlates,and mental health help-seeking

引用

World Journal of Psychiatry 2025年第1期15卷 145-152页

作者： Rui-Yao Wu Lin-feng Ge Bao-liang Zhong Department of Psychiatry The Affiliated Wuhan Mental Health CenterTongji Medical College of Huazhong University of Science&TechnologyWuhan 430012Hubei ProvinceChina Department of Psychiatry Wuhan Mental Health CenterWuhan 430012Hubei ProvinceChina

BACKGROUND Revisiting the epidemiology of posttraumatic stress symptoms(PTSSs)among university students during the coronavirus disease 2019(COVID-19)pandemic as well as understanding the mental health help-seeking behavior of individuals with PTSSs has critical implications for public mental health strategies in future medical *** To investigate the prevalence and correlates of PTSSs among university students during the first wave of the COVID-19 pandemic in China and to examine mental health help-seeking behaviors among these *** A total of 2507 Chinese university students were recruited via snowball *** students completed the Seven-item Screening Scale for Post-traumatic Stress Disorder during the first wave of the COVID-19 pandemic in ***-graphic characteristics,pandemic-related characteristics,and mental health help-seeking behaviors of students with PTSSs were also *** The prevalence of PTSSs among the participants was 28.0%.Seven significant correlates of PTSSs were identified(odds ratio=1.23-3.65,P≤0.024):Female sex,being 19 years old or older,living with others or alone,a low level of family economic status,fair or poor interpersonal relationships,severe or very severe local pandemic,and having family members diagnosed with ***,only 3.28%of the students with PTSSs reported seeking help from mental health *** the 23 students who sought help from mental health specialists,13 opted for online or telephone-based psychological *** Our data suggest that there was a high risk of PTSSs among university students and a high level of unmet mental health needs during the COVID-19 *** delivery of mental health services online or via telephone is a promising approach to address these unmet needs.

关键词： Posttraumatic stress symptoms University students COVID-19 Mental health help-seeking China

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

基于地震勘探与瞬变电磁法信息融合的含水陷落柱精细探测研究

引用

煤矿现代化 2025年第1期34卷 78-83,90页

作者：裴建伟冯亮山西世德孙家沟煤矿有限公司山西忻州036600

在煤矿含水陷落柱精细探测中,地震波场与瞬变电磁场相结合的融合处理方法具有良好的发展前景。为此,以孙家沟煤矿为例,通过提取瞬变电磁法反演电阻率,优化8个对目标地质构造敏感的地震属性,选择基于粒子群优化(PSO-BPNN)的反向传播神经... 详细信息

在煤矿含水陷落柱精细探测中,地震波场与瞬变电磁场相结合的融合处理方法具有良好的发展前景。为此,以孙家沟煤矿为例,通过提取瞬变电磁法反演电阻率,优化8个对目标地质构造敏感的地震属性,选择基于粒子群优化(PSO-BPNN)的反向传播神经网络(BPNN)作为模型试验和工程应用的融合方法,通过试验模型验证了PSO-BPNN预测煤矿不同含水陷落柱(WBCC)的可行性和有效性,在工程应用中,将钻孔属性用于PSO-BPNN训练,取得了较好的融合效果。结果表明,8个属性可以作为基于地震法和瞬变电磁法的WBCC信息融合的主要特征集,进而通过PSO-BPNN检测煤矿陷落柱的边界和丰度。

关键词：地震属性瞬变电磁法含水陷落柱反向传播神经网络

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

Superhydrophobic and corrosion-resistant siloxane-modified MgAl-LDHs coatings on magnesium alloy prepared under mild conditions

引用

International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 450-463页

作者： Wenxi Zhang Zhangzelong Zhuo Dan Xu liang Wu Zhihui Xie Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province College of Chemistry and Chemical EngineeringChina West Normal UniversityNanchong 637002China College of Materials Science and Engineering/National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China

We have developed a superhydrophobic and corrosion-resistant LDH-W/PFDTMS composite coating on the surface of Mg *** composite comprised a tungstate-intercalated(LDH-W)underlayer that was grown at low temperature(relative to hydrothermal reaction conditions)under atmospheric pressure and an outer polysiloxane layer created from a solution containing perfluorodecyltrimethoxysilane(PFDTMS)using a simple immersion *** successful intercalation of tungstate into the LDH phase and the following formation of the polysiloxane layer were confirmed through X-ray diffraction(XRD),Fourier transform infrared(FTIR)spectroscopy,and X-ray photoelectron spectroscopy(XPS).The corrosion resistance of the LDH-W film,both before and after the PFDTMS modification,was evaluated using electrochemical impedance spectroscopy(EIS),Tafel curves,and immersion *** results showed that Mg coated with LDH-W/PFDTMS exhibited significantly enhanced corrosion protection compared to the unmodified LDHW film,with no apparent signs of corrosion after exposure to 3.5wt%NaCl solution for 15 ***,the LDH-W/PFDTMS coating demonstrated superior superhydrophobicity and self-cleaning properties against water and several common beverages,as confirmed by static contact angle and water-repellency *** results offer valuable insights into preparing superhydrophobic and corrosion-resistant LDH-based composite coatings on Mg alloy surfaces under relatively mild reaction conditions.

关键词： Mg alloy corrosion coating layered double hydroxide

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

Solvothermal Synthesis of a 3D Luminescent Cadmium-organic Framework with msw Topological Net

引用

Chinese Journal of Structural Chemistry 2013年第12期32卷 1890-1896页

作者： CUI pei-pei CUI Lun-feng ZHANG liang-liang Key Lab of Colloid and Interface Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShandong University Zhuli Middle School Hanting District College of Science China University of Petroleum (East China)

A new cadmium-organic framework, [Cd2（TBDC）2（DMF）2（H2O）]n （1）, was synthesized by solvothermal reaction of rigid carboxylate ligand 2,3,5,6-tetramethyl-l,4-ben- zenedicarboxylate （H2TBDC） and cadmium nitrate and characterized by elemental analysis, infrared spectrum, thermal analysis, PXRD, single-crystal X-ray diffraction and photoluminescence in the solid state. Compound 1 crystallizes in orthorhombic, space group Pca21 with a = 21.487（6）, b = 7.790（2）, c = 20.666（6） A, C30H40Cd2N2O11, Mr = 829.44, V= 3459.3（16） A3, Z = 4, Dc = 1.593 ***-3,μ = 1.29 mm-1, F（000） = 1672, 2.7〈θ〈27.2°, λ（MoKa） = 0.71073 A, T= 293（2） K, the final R = 0.026, wR = 0.0548 and S = 1.027. X-ray diffraction analysis reveals that complex 1 possesses a 3D framework and exhibits rnsw net. Thus, the solid-state luminescent spectrum of 1 displays that the emission of cadmium（lI） complex shows a peak at 317 nm upon 250 nm excitation at room temperature.

关键词： crystal structure Cd(II) complex hydrogen bond luminescenceproperties 2,3,5,6-tetramethyi-1,4-benzenedicarboxylate (H2TBDC)

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：