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A newly designed big cup nitinol stent for gastric outlet obstruction 被引量:3
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作者 Ding Shi Sheng-Hui Liao Jian-Ping Geng 《World Journal of Gastroenterology》 SCIE CAS CSCD 2010年第33期4206-4209,共4页
AIM:To find out whether a newly designed big cup nitinol stent is suitable for treatment of patients with gastric outlet obstruction resulting from gastric cancer.METHODS:The new stent is composed of a proximal big cu... AIM:To find out whether a newly designed big cup nitinol stent is suitable for treatment of patients with gastric outlet obstruction resulting from gastric cancer.METHODS:The new stent is composed of a proximal big cup segment(20 mm in length and 48-55 mm in diameter),a middle part(60 mm in length and 20 mm in diameter)covered by a polyethylene membrane and a distal sphericity(20 mm in length and 28 mm in diameter).Half of the proximal big cup segment is also covered by a polyethlene membrane,which is adjacent to the middle part of the stent.The stent is preloaded in a 6.0-mm-diameter introducer system.Thirteen patients with gastric outlet obstruction resulting from gastric cancer received the new stents under endoscopic and fluoroscopic guidance.RESULTS:Technical success was achieved in 12 of 13(92.3%)patients.Among the 12 patients in whom endoscopic stent was placed successfully,the clinical success rate was 91.7%during a follow-up of average 6.5 mo.During the first month follow-up,the migration rate was 0%,recurrent obstruction 0%and gastric bleeding 8.3%.During the follow-up between 2-12 mo,no migration,recurrent obstruction and gastric bleeding occurred.CONCLUSION:The proximal big cup segment seems to be effective and promising for technical efficacy,clinical outcome,and preventing migration and tumor ingrowth and increasing the emptying rate of sinus ventriculi. 展开更多
关键词 ENDOSCOPIC Gastric outlet STENOSIS Ob- struction STENTS
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Research on the Path Mechanism and Reconstruction Pattern of Sports and Related Industry Convergence 被引量:169
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作者 杨强 《体育科学》 CSSCI 北大核心 2015年第7期3-9,17,共8页
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THE HAUSDORFF DIMENSION AND MEASURE IN GENERALIZED GEOMETRIC GRAPH DIRECTED CONSTRUCTION
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作者 苏峰 赵兴球 《数学物理学报(A辑)》 CSCD 北大核心 1997年第S1期162-167,共6页
Abthors introduce the notation of generalized geometric constructions in Rm generated by a directed graph G and by a sequence of similarity ratios which are labelled with the edges of this graph. In this paper, it is ... Abthors introduce the notation of generalized geometric constructions in Rm generated by a directed graph G and by a sequence of similarity ratios which are labelled with the edges of this graph. In this paper, it is obtained the Hausdorff dimension and measure of this construction object for some cases. 展开更多
关键词 HAUSDORFF DIMENSION HAUSDORFF MEASURE GENERALIZED GRAPH dirceted con- struction
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One-stage human acellular nerve allograft reconstruction for digital nerve defects
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作者 Xue-yuan Li Hao-liang Hu +4 位作者 Jian-rong Fei Xin Wang Tian-bing Wang Pei-xun Zhang Hong Chen 《Neural Regeneration Research》 SCIE CAS CSCD 2015年第1期95-98,共4页
Human acellular nerve allografts have a wide range of donor origin and can effectively avoid nerve injury in the donor area. Very little is known about one-stage reconstruction of digital nerve defects. The present st... Human acellular nerve allografts have a wide range of donor origin and can effectively avoid nerve injury in the donor area. Very little is known about one-stage reconstruction of digital nerve defects. The present study observed the feasibility and effectiveness of human acellular nerve allograft in the reconstruction of 〈 5-cm digital nerve defects within 6 hours after injury. A total of 15 cases of nerve injury, combined with nerve defects in 18 digits from the Department of Emergency were enrolled in this study. After dehridement, digital nerves were reconstructed using human acellular nerve allografts. The patients were followed up for 6-24 months after reconstruction. Mackinnon-Dellon static two-point discrimination results showed excellent and good rates of 89%. Semmes-Weinstein monofilament test demonstrated that light touch was normal, with an obvious improvement rate of 78%. These findings confirmed that human acellular nerve allograft for one-stage reconstruction of digital nerve defect after hand injury is feasible, which provides a novel trend for peripheral nerve reconstruction. 展开更多
关键词 nerve regeneration peripheral nerve ALLOGRAFT digital nerve nerve conduit nerve recon-struction nerve defect sensory nerve neural regeneration
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Zouxian Thermal Power Plant—An example for excellent design,higher tempo of construction and better quality of project in China
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作者 Ma Zhizhong China Electricity Council 《Electricity》 1992年第4期22-25,共4页
Zouxian Thermal Power Plant in Shandong Province isthe first one in China with four 300 MW Indigenousturbine generator units.The manufacturers and types of the mainequipment are as follows:Boilers(Dongfang Boiler Work... Zouxian Thermal Power Plant in Shandong Province isthe first one in China with four 300 MW Indigenousturbine generator units.The manufacturers and types of the mainequipment are as follows:Boilers(Dongfang Boiler Works):coal-fired natural circulationboilers,type DG-1000/170-1.Turbines(Shanghai Turbine Works):condensing turbines,type N300-165/550/550.Generators(Shanghai Electric Machinery Mfg.Works):typeQFS-300-2. 展开更多
关键词 SHANDONG RAILWAY TEMPO MANUFACTURE DELIVER Turbine QUARTERS generator struction annually
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Swarms of Destruction--Billions of locusts devastating vegetation and crops in East Africa
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作者 Godfrey Olukya 《ChinAfrica》 2020年第4期42-43,共2页
They arrive in their millions like a dangerous cloud-darkening the sky and bringing fear,anger and despair to East Africa.Voracious desert locusts have,in the past several weeks,gone on an eating rampage in countries ... They arrive in their millions like a dangerous cloud-darkening the sky and bringing fear,anger and despair to East Africa.Voracious desert locusts have,in the past several weeks,gone on an eating rampage in countries in the region,including Somalia,Kenya,Ethiopia,Djibouti,Eritrea,Tanzania,South Sudan,the Democratic Republic of the Congo and Uganda. 展开更多
关键词 East bringing struction
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Destruction of North China Craton:Uirveiling the Violent Side of the Ancient Continent
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作者 SONG Jianlan 《Bulletin of the Chinese Academy of Sciences》 2020年第3期146-149,共4页
The 2020 TKK Science Award in Earth Sciences was conferred on CAS Member Prof.ZHU Rixiang,a researcher working at the CAS Institute of Geology and Geophysics,for his outstanding work on the destruction of the North Ch... The 2020 TKK Science Award in Earth Sciences was conferred on CAS Member Prof.ZHU Rixiang,a researcher working at the CAS Institute of Geology and Geophysics,for his outstanding work on the destruction of the North China Craton (NCC),a complicated issue that has been puzzling geologists for a long time. 展开更多
关键词 CRATON Earth struction
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Transfrom Construction Waste into Resources
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作者 DANG XIAOFEI 《China Today》 2016年第10期56-57,共2页
THE almost two-meter-high sculpture Liu Xiaofan admired at an exhibition,and which he assumed was bronze,turned out to have been made from recycled building waste.Liu immediately thought of the pile of demolition debr... THE almost two-meter-high sculpture Liu Xiaofan admired at an exhibition,and which he assumed was bronze,turned out to have been made from recycled building waste.Liu immediately thought of the pile of demolition debris next to his home.He had witnessed new construction waste steadily piling up next to his apartment building and the community public lawn.Dust floated high and free as the wind blew and deposited it on his balcony.This epitomizes the "metabolism" of Chinese cities. 展开更多
关键词 exhibition witnessed debris metabolism bronze recycled assumed struction steadily turned
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Research on the Construction Mechanism of Community Participation Subject from the Perspective of Institutional Analysis
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作者 Wei Zhihui Dang rui 《学术界》 CSSCI 北大核心 2015年第4期270-275,共6页
The article combines institutional change and social participation of the subjects. By investigating the expanding of community subject and gradually cultivating their ability to participate,we can test the achievemen... The article combines institutional change and social participation of the subjects. By investigating the expanding of community subject and gradually cultivating their ability to participate,we can test the achievements of community development in our country,and lay a foundation for reaching the social development goals. 展开更多
关键词 制度分析 社区参与 机制 社会参与 社会发展 机构改革 基础
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The Catastrophe of Civilization:The Destruction of the Grandeur of the Old Summer Palace
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作者 Chen Wenping An Su 《China Book International》 2024年第2期18-21,共4页
The first part of this book follows the thread of ten major events involving the dispersal of cultural relics,unveiling the complex truths behind the loss of national treasures.The latter part meticulously selects 108... The first part of this book follows the thread of ten major events involving the dispersal of cultural relics,unveiling the complex truths behind the loss of national treasures.The latter part meticulously selects 108 precious relics overseas,ranging from the Neolithic era to the Qing Dynasty,covering Dunhuang relics,calligraphy,ceramics,bronzes,jades,lacquerware,sculptures,and oracle bone scriptures,etc.It interprets the historical background,craftsmanship,color details,aesthetic design,and symbolic meanings,encompassing exquisite collections from dozens of institutions abroad,offering a glimpse into the rare treasures of Chinese heritage. 展开更多
关键词 ORACLE struction offering
原文传递
lnstruction for Authors
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《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2023年第1期I0001-I0001,共1页
Journal of Iron cnd Steel Research International,sponsored by China Iron and Steel Research Institute Group,is an academic joumal which provides an international medium for publication of original research articles,re... Journal of Iron cnd Steel Research International,sponsored by China Iron and Steel Research Institute Group,is an academic joumal which provides an international medium for publication of original research articles,reviews and letters in the fields of metallurgy and metallic materials.It has been covered by Science Citation Index(SCI)and Engineering Index(EI)since 1996 and 2016,respectively. 展开更多
关键词 materials. struction METALLIC
原文传递
真地表速度建模技术在复杂山地地震资料成像中的应用 被引量:1
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作者 彭更新 顾小弟 +3 位作者 段文胜 公亭 赵锐锐 王勍 《新疆石油地质》 CAS CSCD 北大核心 2024年第2期244-252,共9页
传统的叠前深度偏移成像技术将偏移成像和静校正问题分开处理,在复杂山地资料处理中,由于地表条件复杂、近地表横向速度变化剧烈、高速层出露等问题,基于地表一致性假设的静校正处理会引起波场畸变,导致旅行时计算误差较大,影响深度偏... 传统的叠前深度偏移成像技术将偏移成像和静校正问题分开处理,在复杂山地资料处理中,由于地表条件复杂、近地表横向速度变化剧烈、高速层出露等问题,基于地表一致性假设的静校正处理会引起波场畸变,导致旅行时计算误差较大,影响深度偏移成像效果。因此,提出了一种基于真地表偏移面的全深度建模与成像技术方案,从地表高程面开始速度建模,计算旅行时,将静校正问题隐含在偏移成像过程中,在复杂山地资料处理中取得了较好的应用效果。 展开更多
关键词 复杂山地 静校正 初至层析 微测井 真地表 速度建模 波前构建 射线密度
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人工颞下颌关节在口腔颌面外科中应用的策略思考与展望
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作者 毕瑞野 祝颂松 《华西口腔医学杂志》 CAS CSCD 北大核心 2024年第5期551-557,共7页
颞下颌关节在人体口颌系统中发挥至关重要的作用,其损伤破坏可造成口颌功能障碍与继发颌骨畸形,严重影响患者生存质量。人工颞下颌关节置换是关节严重破坏的主要治疗方式之一,并具有其他方式不可替代的优势。近年来,人工颞下颌关节置换... 颞下颌关节在人体口颌系统中发挥至关重要的作用,其损伤破坏可造成口颌功能障碍与继发颌骨畸形,严重影响患者生存质量。人工颞下颌关节置换是关节严重破坏的主要治疗方式之一,并具有其他方式不可替代的优势。近年来,人工颞下颌关节置换在我国日益受到重视与关注,但因多种原因未获得普及与推广。本文通过总结国内外人工颞下颌关节置换经验,对人工关节置换的治疗原则、治疗流程与技术要点进行系统阐述,旨在促进人工颞下颌关节置换在临床上的应用与推广。 展开更多
关键词 颞下颌关节 关节重建 关节假体 颌骨畸形 髁突
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特种车辆多维载荷谱加速方法及在振动环境模拟试验中的应用
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作者 韩庆 房强 +1 位作者 范伟光 王帅 《装备环境工程》 CAS 2024年第6期45-52,共8页
目的 解决车辆多轴轴耦合台架试验耗时长、花费大以及振动环境模拟精度低等问题。方法 将雨流投影方法运用到多维载荷加速处理中,利用传统雨流滤波法和多轴雨流投影滤波方法分别对特种车辆部件实际所受的多轴载荷进行加速处理,对加速后... 目的 解决车辆多轴轴耦合台架试验耗时长、花费大以及振动环境模拟精度低等问题。方法 将雨流投影方法运用到多维载荷加速处理中,利用传统雨流滤波法和多轴雨流投影滤波方法分别对特种车辆部件实际所受的多轴载荷进行加速处理,对加速后的多维载荷信号开展基于时域波形再现的振动环境模拟,以更有效地利用轮式车多轴轴耦合试验台开展加速疲劳试验。结果 对比加速前后的多维载荷信号,在时域、频域、损伤域基本一致的前提下,多维载荷信号时间压缩了50%,多轴振动环境的模拟精度大于80%。结论 采用该方法开展车轮加速疲劳试验,能够精确再现被试件的实际振动环境。通过实际试验验证,可以很好地再现故障出现的时间和形式,与实际野外路试结果十分吻合。 展开更多
关键词 加速疲劳试验 多维载荷信号处理 雨流滤波 RP滤波方法 时域波形再现 等效里程
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“双高计划”背景下教学创新团队建设研究
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作者 于生兰 黄陈 杨海峰 《泰州职业技术学院学报》 2024年第4期32-35,共4页
教学创新团队建设是职业教育教学质量提升的重要举措,同时也是高职院校内涵发展、质量发展、可持续发展的重要抓手。文章以国家职业教育药品生产技术教师教学创新团队建设为实践载体,聚焦现代制药产业高端人才培养目标要求,以习近平新... 教学创新团队建设是职业教育教学质量提升的重要举措,同时也是高职院校内涵发展、质量发展、可持续发展的重要抓手。文章以国家职业教育药品生产技术教师教学创新团队建设为实践载体,聚焦现代制药产业高端人才培养目标要求,以习近平新时代中国特色社会主义思想为指引,以团队教师技术技能积累与协同创新能力提升为主线,以校企协同工作机制和跨界培养机制为保障,打造校企合作、专兼结合的高水平结构化教学创新团队,为药品生产技术专业技术技能人才培养提供强有力的师资保障,进而形成职业教育教师教学创新团队建设的“范式”。 展开更多
关键词 高职教育 药品生产技术 教学创新团队 建设研究
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基于计算机视觉的舰船模型三维重建方法
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作者 王玉 孙红娟 《舰船科学技术》 北大核心 2024年第6期161-164,共4页
为保证舰船模型三维重建的完整性以及细节程度,提出基于计算机视觉的舰船模型三维重建方法。基于双目立体视觉计算全局舰船目标点云坐标,生成舰船全局的三维点云数据;多视角点云配准方法对该数据进行配准后,输入多尺度特征递归卷积的稠... 为保证舰船模型三维重建的完整性以及细节程度,提出基于计算机视觉的舰船模型三维重建方法。基于双目立体视觉计算全局舰船目标点云坐标,生成舰船全局的三维点云数据;多视角点云配准方法对该数据进行配准后,输入多尺度特征递归卷积的稠密点云重建网络模型中,通过该模型生成舰船模型三维深度图,在此基础上,利用运动结构法完成舰船深度图中的三维曲线重建,对舰船模型进行颜色渲染,输出舰船模型三维重建结果。测试结果显示,该方法能够完成不同图像之间对应点的可靠匹配,确定各点的坐标位置;三维重建后模型的空间偏差均在0.015以下;能够较好地完成舰船结构的重建,重建后舰船模型的完整性较好,清晰呈现舰船的结构细节。 展开更多
关键词 计算机视觉 舰船模型 三维重建 多视角 颜色渲染 三维曲线重建
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教育现象学视域下的职业教育课程评价体系重构
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作者 袁顶国 刘秋婷 《中国职业技术教育》 北大核心 2024年第14期64-70,79,共8页
职业教育课程评价是构建现代职业教育课程体系的重要组成部分,在制定课程目标、选择课程内容、组织课程实施、选择课程形式、了解课程效果等方面起着重要的导向作用。但目前职业教育课程评价面临着教育智慧运用与功利评价心态的冲突、... 职业教育课程评价是构建现代职业教育课程体系的重要组成部分,在制定课程目标、选择课程内容、组织课程实施、选择课程形式、了解课程效果等方面起着重要的导向作用。但目前职业教育课程评价面临着教育智慧运用与功利评价心态的冲突、课程构建多主体与课程评价主体单一的失衡、综合素养发展与僵化评价方法的对立等问题。运用教育现象学,从运用教育智慧、倡导多主体评价、重视课程体验与技能获得的动态过程、重视非预期效果、丰富评价方法等维度,重新构建职业教育课程评价体系的路径。 展开更多
关键词 职业教育 教育现象学 课程评价 体系重构
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电磁层析成像技术中的谱参数混合共轭梯度法
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作者 李柳 罗跃 +2 位作者 王晨宇 安治钢 王艳丽 《沈阳师范大学学报(自然科学版)》 CAS 2024年第1期23-29,共7页
电磁层析成像技术是基于电磁感应原理的过程检测技术,图像重建是解决其反问题的关键.基于共轭梯度算法,修正搜索方向和迭代参数,推导出基于谱参数的混合共轭梯度算法,以提高图像重建质量和收敛性.介绍了电磁层析成像系统的实验室模型和... 电磁层析成像技术是基于电磁感应原理的过程检测技术,图像重建是解决其反问题的关键.基于共轭梯度算法,修正搜索方向和迭代参数,推导出基于谱参数的混合共轭梯度算法,以提高图像重建质量和收敛性.介绍了电磁层析成像系统的实验室模型和灵敏度分布矩阵,作为反问题基础;对搜索方向进行修正,提出一个新的谱参数,用来控制新旧搜索方向之间的角度,根据每一步迭代的残差结果,寻找最优解;改善共轭参数,分析非线性共轭梯度算法中FR算法(fletcher-reeves method)和PRP算法(polak-ribiere-polyak method)的各自优势,将它们按照一定比例进行混合,得到一种新的混合共轭梯度算法;将谱参数混合共轭梯算法应用到电磁层析成像实验室系统中,构建了3种典型实验室模型,对比谱参数混合共轭梯度算法与传统算法并作出评价.实验结果表明:谱参数混合共轭梯度算法的重建图像的质量更高,具有较好的数值表现;混合共轭梯度算法结合了FR算法和PRP算法的优点,收敛速度比PRP算法快,成像质量比其他算法高. 展开更多
关键词 电磁层析成像技术 共轭梯度 图像重建
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高校学生思想政治教育微载体建设质量评价机制的构建
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作者 张宝君 张浩言 《吉林师范大学学报(人文社会科学版)》 2024年第2期76-84,共9页
科学评价是保证质量的前提。高校学生思想政治教育微载体作为优势功能的聚合物,其建设过程和质量离不开科学、系统、高效的评价机制这一“定盘星”。紧扣立德树人任务,贴近学生现实需求,顺应科技发展大势,建立评价目标导向和体系架构厘... 科学评价是保证质量的前提。高校学生思想政治教育微载体作为优势功能的聚合物,其建设过程和质量离不开科学、系统、高效的评价机制这一“定盘星”。紧扣立德树人任务,贴近学生现实需求,顺应科技发展大势,建立评价目标导向和体系架构厘定机制、健全评价指标内容动态调整机制、落实评价关键技术创新机制,既是推进高校学生思想政治教育微载体建设和质量提升的应然选择,也是高校学生思想政治教育创新创优的根本保证。 展开更多
关键词 高校 学生思想政治教育微载体 建设 评价 机制
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高职院校公共体育课程教学创新团队建设路径
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作者 张磊 《辽宁师专学报(自然科学版)》 2024年第2期85-87,共3页
在推动现代职业教育高质量发展背景下,为了激发学生的体质潜能、提升学生运动能力和创新能力,对教学创新团队的建设目标、改革方向、优化结构等问题进行分析,进而相应提出构建高职院校公共体育课程教学创新团队的建设路径.所提措施为持... 在推动现代职业教育高质量发展背景下,为了激发学生的体质潜能、提升学生运动能力和创新能力,对教学创新团队的建设目标、改革方向、优化结构等问题进行分析,进而相应提出构建高职院校公共体育课程教学创新团队的建设路径.所提措施为持续推动体育学科发展和提升职业教育的整体水平提供理论参考. 展开更多
关键词 高职院校 公共体育课程 教学创新团队 建设目标
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