检索结果-南通市图书馆

Nationwide survey analysis of esophagogastric varices in portal hypertension based on endoscopic management in china

引用

Portal Hypertension & Cirrhosis 2024年第3期3卷 129-138页

作者： Xing Wang bing Hu Yiling li Weichun lin Zhijie Feng Yanjing Gao Zhining Fan Feng Ji bingrong liu Jinhai Wang Wenhui Zhang Tong Dang Hong xu Derun Kong lili Yuan liangbi xu Shengjuan Hu liangzhi Wen Ping Yao Yunxiao liang Xiaodong Zhou Huiling Xiang Xiaowei liu Xiaoquan Huang Yinglei Miao Xiaoliang Zhu De‐An Tian Feihu Bai Jitao Song ligang Chen Yangzhen Bian Ba Yingcai Ma Yifei Huang bin Wu Xiaolong Qi CHESS‐Endoscopyconsortium Department of Gastroenterology The Third Affiliated Hospital of Sun Yat‐sen UniversityGuangzhouGuangdongChina Guangdong Province engineering and Technology Research Center of Digestive Endoscopy GuangzhouGuangdongChina Department of Gastroenterology and Hepatology West China Hospital of Sichuan UniversityChengduSichuanChina Department of Gastroenterology The First Affiliated Hospital of China Medical UniversityShenyangLiaoningChina Department of Gastroenterology The Second Hospital of Hebei Medical UniversityShijiazhuangHebeiChina Department of Gastroenterology Qilu Hospital of Shandong UniversityJinanShandongChina Department of Digestive Endoscopy The First Affiliated Hospital of Nanjing Medical UniversityNanjingJiangsuChina Department of Gastroenterology The First Affiliated Hospital of Zhejiang UniversityHangzhouZhejiangChina Department of Gastroenterology The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenanChina Department of Gastroenterology The Second Affiliated Hospital of Xi'an Jiaotong UniversityXi'anShaanxiChina Department of Gastroenterology Beijing Daxing District People's HospitalBeijingChina Department of Gastroenterology The Second Affiliated Hospital of Baotou Medical CollegeBaotouInner MongoliaChina Department of Gastroenterology The First Hospital of Jilin UniversityChangchunJilinChina Department of Gastroenterology The First Affiliated Hospital of Anhui Medical UniversityHefeiAnhuiChina Department of Digestive Endoscopy The Second Hospital of Shanxi Medical UniversityTaiyuanShanxiChina Digestive Endoscopy Center The Affiliated Hospital of Guizhou Medical UniversityGuiyangGuizhouChina Department of Gastroenterology People's Hospital of Ningxia Hui Autonomous RegionNingxia Medical UniversityYinchuanNingxiaChina Department of Gastroenterology Daping HospitalArmy Medical UniversityChongqingChina Department of Gastroenterology The First Affiliated Hospital of Xinjiang Medical UniversityUrumqiXinjiangChina Department of Gastroente

Aims:The endoscopic treatment of esophagogastric varices is challenging,and the nationwide application of endoscopic therapies for various types of esophagogastric varices and different clinical scenarios remains *** study investigated the use of endoscopic therapy for portal hypertension in ***:This study used a questionnaire survey initiated by the liver Health Consortium in china to investigate the use of endoscopic therapies for portal *** were released online from January 30,2.2. to February 2.,2.2. and filled out by chief physicians or senior instructors responsible for endoscopic therapies in participating hospitals across 31 provinces(autonomous regions and municipalities)in *** of guideline adherence between primary and referral medical centers were performed using the chi‐square test or Fisher's exact ***:In total,836 hospitals participated in the *** primary and secondary prophylaxis of esophagogastric variceal bleeding(EGVB),adherence to the national guidelines was 72.5%(606/836)and 39.2.(32./836),*** differences were observed in the rate of adherence between the primary and referral centers for primary(79.9%[111/139]vs.71.0%[495/697],p=0.033)and secondary prophylaxis(2..3%[38/139]vs.41.6%[2.0/697],p=0.002..Of the hospitals,78.2.(654/836)preferred endoscopic therapies for acute EGVB,and the timing of endoscopy was usually within 12.h(48.5%,317/654)and 12.2. h(36.9%,2.1/654)after *** therapy was more likely to be the first choice of treatment for acute EGVB in referral centers than in primary centers(82.6%[576/697]vs.56.1%[78/139],p1).Regarding the management of gastroesophageal varices type 2.and isolated gastric varices type 1,the most prevalent procedures were cyanoacrylate injection combined with sclerotherapy(48.2.[403/836]and 2..9%[2.0/836],respectively);however,substantial hospitals preferred clip-assisted therapies(12.4%[104/836]and 2

关键词： endoscopy esophagogastric varices guideline adherence portal hypertension questionnaire survey

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

Numerical and Experimental Evaluation of Shine-Through Loss and Beam Heating Due to Neutral Beam Injection on EAST

引用

Chinese Physics Letters 2021年第5期38卷 46-50页

作者： Jin-Fang Wang Ying-Ying li bin Wu Yu-Qing Chen Jun li Yong-Jian xu Long-Xi Chen Bao-Long Hao Deng Zhou Juan Huang Si-Ye Ding Zhen Yang Ya-Wei Hou Xiao-Juan liu Nong Xiang Institute of Plasma Physi Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China ENN Fusion Technology R&D Center Langfang 065001China school of Information engineering Shandong Youth University of Political ScienceJi’nan 250103China Advanced Energy Research Center Shenzhen UniversityShenzhen 518060China CAS Key Laboratory of Geospace Environment and Department of Plasma Physics and Fusion engineering University of Science and Technology of ChinaHefei 230026China KTX Laboratory and Department of Plasma Physics and Fusion engineering University of Science and Technology of ChinaHefei 230026China

This research applies experimental measurements and NUBEAM,ONETWO and TRANSP modules to investigate the shine-through(ST)loss ratio and beam heating percentage of neutral beam injection on *** and simulations confirm that the ST loss ratio increases linearly with beam energy,and decreases exponentially with plasma ***,using the multi-step fitting method,we present analytical quantitative expressions of ST loss ratio and beam heating percentage,which are valuable for the high parameter long-pulse experiments of EAST.

关键词： Numerical and Experimental Evaluation of Shine-Through Loss and Beam Heating Due to Neutral Beam Injection on EAST

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

基于接触状态感知发育的机器人柔性装配方法

引用

控制与决策 2021年第4期36卷 876-884页

作者：张思思李凤鸣杨旭亭李贻斌宋锐山东大学控制科学与工程学院济南250100

为了提高工业机器人装配的实时性、自适应性和鲁棒性,借鉴人类后天感知学习方式,提出一种基于接触状态感知发育的柔性装配方法.采用机器人末端的位姿和力/力矩来描述装配接触状态,结合支持向量数据描述和改进极限学习机对接触状态感知发... 详细信息

为了提高工业机器人装配的实时性、自适应性和鲁棒性,借鉴人类后天感知学习方式,提出一种基于接触状态感知发育的柔性装配方法.采用机器人末端的位姿和力/力矩来描述装配接触状态,结合支持向量数据描述和改进极限学习机对接触状态感知发育,形成可自我更新成长的经验知识库,预测机器人的装配动作,完成柔性装配任务.为验证所提出方法的有效性,以小型断路器卡合装配为例进行实验,实验结果表明,采用接触状态感知发育可实现装配经验知识库的自我更新,完成机器人的柔性装配,验证了所提出方法的可行性和有效性.

关键词：机器人感知发育装配作业接触状态经验知识

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

An attribute recognition model for safe thickness assessment between concealed karst cave and tunnel

引用

Journal of Central South university 2019年第4期26卷 955-969页

作者： HUANG Xin li Shu-cai xu Zhen-hao GUO Ming SHI xue-song GAO bin ZHANG Bo liU Lang Geotechnical & Structural engineering Research Center Shandong University school of Qilu Transportation Shandong University SinoProbe Center-china Deep Exploration Center Chinese Academy of Geological Sciences china Railway engineering Consulting Group Co. Ltd. school of Civil engineering Shangdong University school of Energy Xi'an University of Science and Technology

An attribute recognition model for safe thickness assessment between a concealed karst cave and a tunnel is established based on the attribute mathematic *** model can be applied to carrying out risk classification of the safe thickness between a concealed karst cave and a tunnel and to guarantee construction’s safety in tunnel ***,the assessment indicators and classification standard of safe thickness between a concealed karst cave and a tunnel are studied based on the perturbation *** some attribute measurement functions are constructed to compute the attribute measurement of each single index and synthetic attribute ***,the identification and classification of risk assessment of safe thickness between a concealed karst cave and a tunnel are recognized by the confidence *** results of two {2. application show that the evaluation results agree well with the site situations in *** results provide a good guidance for the tunnel construction.

关键词： concealed karst cave karst tunnel safe thickness attribute recognition method

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

摆线转子式油泵齿廓的形成与参数方程的建立

引用

山东大学学报（工学版） 2002年第2期32卷 172-176页

作者：毛华永李国祥徐秀兰杨滨山东大学能源与动力工程学院山东省济南市250061

介绍了摆线转子式油泵内外转子的结构和参数名称及各种摆线的定义和方程 ,较详细的阐述了短幅外摆线内等距线转子齿廓的形成及内转子理论齿廓和工作齿廓参数方程的建立并指出基本参数Z1,e ,R ,a等一旦确定 ,便可由所建参数方程很容易... 详细信息

介绍了摆线转子式油泵内外转子的结构和参数名称及各种摆线的定义和方程 ,较详细的阐述了短幅外摆线内等距线转子齿廓的形成及内转子理论齿廓和工作齿廓参数方程的建立并指出基本参数Z1,e ,R ,a等一旦确定 ,便可由所建参数方程很容易的求得齿廓曲线x ,y值 ,从而根据所得到的一组x ,y值绘出内转子的齿廓。

关键词：转子式油泵参数方程摆线齿轮齿廓结构

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

快速多重旋转碾压对碳钢表面组织结构及渗硼的影响

引用

表面技术 2019年第3期48卷 112-117页

作者：袁兴栋王泽力许斌山东建筑大学材料科学与工程学院济南250101

目的进一步提高碳钢表面低温B-Cr-Re固体渗硼层的质量。方法采用快速多重旋转碾压法(Fast multiple rotation rolling,FMRR)对碳钢表面进行预处理,然后进行低温B-Cr-Re固体共渗研究。利用透射电子显微镜、高分辨透射电子显微镜、扫描电... 详细信息

目的进一步提高碳钢表面低温B-Cr-Re固体渗硼层的质量。方法采用快速多重旋转碾压法(Fast multiple rotation rolling,FMRR)对碳钢表面进行预处理,然后进行低温B-Cr-Re固体共渗研究。利用透射电子显微镜、高分辨透射电子显微镜、扫描电子显微镜、X射线衍射仪等测量仪器对基体表层组织结构、显微硬度和渗硼层组织结构进行了表征。结果经FMRR处理后,基体表层发生严重塑性变形,沿着垂直于基体表面由表及里的方向,变形程度逐渐变小,总变形层厚度约为30μm,变形方向呈方向一致的流线结构;部分晶粒发生破碎现象,晶粒逐渐细化,出现约为30nm的纳米结构层,同时观察到基体表层存在非晶、孪晶、高密度位错等结构缺陷。经FMRR处理后,只有?-Fe相的X射线衍射峰变宽,但未发现新相产生。结论经FMRR处理后,基体表层显微硬度明显提高,基体表面得到明显强化。FMRR方法提高了基体表面低温B-Cr-Re共渗速度,低温渗硼层的平均厚度约为30μm,约为未处理低温渗硼层厚度的1.7倍,低温渗硼层质量也明显得到改善。

关键词：快速多重旋转碾压渗硼层表面纳米化非晶位错

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

Petroleum coke derived porous carbon/NiCoP with efficient reviving catalytic and adsorptive activity as sulfur host for high performance lithium-sulfur batteries

引用

Nano Research 2022年第5期15卷 4058-4067页

作者： Bo Zhang Lu Wang bin Wang Yanjun Zhai Shuyuan Zeng Meng Zhang Yitai Qian liqiang xu Key Laboratory of Colloid and Interface Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringState Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100China Key Laboratory/Collaborative Innovation Center of Chemical Energy Storage&Novel Cell Technology School of Chemistry and Chemical EngineeringLiaocheng UniversityLiaocheng 252000China

Sulfur-host material with abundant pore structure and high catalysis plays an important role in development of high-energy-density lithium-sulfur(li-S)***,we implanted NiCoP nanoparticles into the N,S co-doped porous carbon derived from petroleum coke(PCPC)to fabricate the sulfur-host of PCPC/NiCoP *** high specific surface area of PCPC provides abundant adsorption sites for capturing liPSs and the NiCoP nanoparticles to improve the polarity and boost the liPSs conversion kinetics of *** li-S cells fabricated with PCPC/NiCoP as sulfur-host deliver high discharge capacity of 1,462.7 mAh·g^(-1)under the current density of 0.1 C and exhibit ultralong lifespan over 800 cycles under the current density of 1,2.and even 5 ***,the prepared composites cathodes deliver an outstanding discharge capacity of 932.5 and 82..4 mAh·g^(-1)at 0.5 and 1 C with a high sulfur loading of over 3.90 mg·cm^(-2.,and remain stable about 60 ***,the promoted adsorption-conversion process of polysulfides by introducing NiCoP nanoparticles into PCPC was investigated by experimental and theoretical calculation *** work offers a new light for tacking the obstacles of porous carbon-based sulfur-host and propelling the development of petroleum coke-based porous carbon for high performance li-S batteries.

关键词： porous carbon derived from petroleum coke(PCPC) NiCoP nanoparticles(NPs) lithium polysulfides(liPSs) catalytic andadsorptiveactivity

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

不同类型人工湿地处理富营养化水体的试验研究

引用

西南农业学报 2018年第12期31卷 2697-2703页

作者：李长虹李伟斯徐斌李修岭山东省临沂市环境监测站山东临沂276000 临沂大学生命科学学院山东临沂276000 青岛理工大学环境与市政工程学院山东青岛266033

【目的】针对富营养化水质,在同等条件下分别对表面流、潜流、垂直流3种人工湿地的净化作用进行对比,探索不同湿地类型应用于富营养化水体处理效率之间的差异。【方法】采用原位观测和室内化验的方法测定了人工湿地不同季节水质状况(TN... 详细信息

【目的】针对富营养化水质,在同等条件下分别对表面流、潜流、垂直流3种人工湿地的净化作用进行对比,探索不同湿地类型应用于富营养化水体处理效率之间的差异。【方法】采用原位观测和室内化验的方法测定了人工湿地不同季节水质状况(TN、NH_4^+-N、TP、高锰酸钾指数、BOD_5和COD_(Cr)),研究了不同类型人工湿地对富营养化水体的净化作用。【结果】不同类型的人工湿地对水体的营养成分净化效果存在较大的差异,虽然具体的净化效果不尽相同,但3种类型的湿地对TN、NH_4^+-N、TP、高锰酸钾指数、BOD_5和COD_(Cr)去除率均体现出明显的季节变化特点,均呈倒"V"形的变化趋势,并在夏季达到最大水平的去除率,同样的月份,垂直流对水质各指标的去除效果最佳,其次是潜流、表面流,其中对BOD_5和COD_(Cr)的去除效果相对更佳,不同类型人工湿地对NH_4^+-N、TN的去除率在0.05的显著性水平下存在明显的差异,对高锰酸钾指数净化效果相差不大;垂直流和表面流对BOD_5和COD_(Cr)去除率差异并不显著。与潜流和表面流湿地相比,垂直流湿地植被N含量、P含量、N积累量和P积累量均为最高,而潜流和表面流差异不大。通过相关性分析发现,就这3种不同类型的人工湿地而言,其对NH_4^+-N、TN、TP的去除率分别与湿地植物N、P含量及累计量存在显著相关性,以此达到去除水质中N、P等元素的目的。【结论】垂直流人工湿地对富营养化水体的净化效果更佳。

关键词：人工湿地富营养化水体试验

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

Initiating binary Metal Oxides Microcubes Electromagnetic Wave Absorber Toward Ultrabroad Absorption Bandwidth Through Interfacial and Defects Modulation

引用

Nano-Micro Letters 2023年第12期15卷 68-81页

作者： Fushan li Nannan Wu Hideo Kimura Yuan Wang Ben bin xu Ding Wang Yifan li Hassan Algadi Zhanhu Guo Wei Du Chuanxin Hou school of Environmental and Material engineering Yantai UniversityNo.30 Qingquan RoadYantaiShandong 264005People’s Republic of China school of Material science and {2. Shandong University of Science and TechnologyQingdao 266590People’s Republic of China Mechanical and Construction engineering Faculty of Engineering and EnvironmentNorthumbria UniversityNewcastle Upon Tyne NE18STUK College of materials science and {2. Taiyuan University of Science and TechnologyTaiyuan 030024People’s Republic of China Department of Electrical engineering Faculty of EngineeringNajran University11001 NajranSaudi Arabia

Cobalt nickel bimetallic oxides(NiCo_(2.O_(4))have received numerous attentions in terms of their controllable morphology,high temperature,corrosion resistance and strong electromagnetic wave(EMW)absorption ***,broadening the absorption bandwidth is still a huge challenge for NiCo_(2.O_(4)-based ***,the unique NiCo_(2.O_(4)@C core-shell microcubes with hollow structures were fabricated via a facile sacrificial template *** concentration of oxygen vacancies and morphologies of the three-dimensional(3D)cubic hollow core-shell NiCo_(2.O_(4)@C framework were effectively optimized by adjusting the calcination *** specially designed 3D framework structure facilitated the multiple reflections of incident electromagnetic waves and provided rich interfaces between multiple components,generating significant interfacial polarization *** polarizations induced by oxygen vacancies could further enhance the attenuation ability for the incident EM *** optimized NiCo_(2.O_(4)@C hollow microcubes exhibit superior EMW absorption capability with minimum RL(RLmin)of-84.45 dB at 8.4 GHz for the thickness of 3.0 ***,ultrabroad effective absorption bandwidth(EAB)as large as 12.48 GHz(5.52.18 GHz)is *** work is believed to illuminate the path to synthesis of high-performance cobalt nickel bimetallic oxides for EMW absorbers with excellent EMW absorption capability,especially in broadening effective absorption bandwidth.

关键词： Electromagnetic wave absorber NiCo_(2.O_(4)@C Microcubes Oxygen vacancy Effective absorption bandwidth

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

Effect of Human Cytomegalovirus Infection on Nerve Growth Factor Expression in Human Glioma U2.1 Cells

引用

Biomedical and Environmental sciences 2009年第4期22卷 354-358页

作者： HAI-TAO WANG bin WANG ZHI-JUN liU ZHI-QIANG BAI liNG li HAI-YAN liU DONG-MENG QIAN ZHI-YONG YAN xu-XIA SONG Department of Microbiology Qingdao Medical College and Key Laboratory of Medicine and Biotechnology of Qingdao Qingdao University Medical College Qingdao 266071 Shandong China Qingdao Center for Disease Control and Prevention Qingdao 266033 Shandong China LRB 2.0E University of Massachusetts Medical School Worcester MA. 01605 USA

Objective To explore the change of endogenic nerve growth factor （NGF） expression in human glioma cells infected with human cytomegalovirus （HCMV）. Methods U2.1 cells were cultured in RPMI 1640 culture medium and infected with HCMV AD 169 strain in vitro to establish a cell model of viral infection. Morphologic changes of U2.1 cells were observed under inverted microscope before and after infection with HCMV. Expression of NGF gene and protein of cells was detected by RT-PCR and Western blotting before and after infection with HCMV. Results The cytopathic effects of HCMV-infected cells appeared on day 5 after infection. However, differential NGF expression was evident on day 7. NGF expression was decreased significantly in U2.1 cells on day 7 after infection in comparison with control group （P〈0.05）. Conclusion HCMV can down-regulate endogenous NGF levels in human glioma cell line U2.1.

关键词： Human cytomegalovirus U2.1 cells Nerve growth factor

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：