检索结果-南通市图书馆

Sensory innervation around immediately vs. delayed loaded implants: a pilot study

International Journal of Oral Science 2015年第1期7卷 49-55页

作者： Yan Huang Jeroen van Dessel Wendy Martens Ivo Lambrichts wei-jian zhong Guo-Wu Ma Dan Lin Xin Liang Reinhilde Jacobs Department of Imaging & Pathology Faculty of Medicine University of Leuven and Oral & Maxillo-facial Surgery University Hospitals Leuven State Key Laboratory of Oral Diseases West China Hospital of Stomatology Sichuan University Biomedical Research Institute Hasselt University School of Stomatology Dalian Medical University Center for Statistics Hasselt University

Although neurophysiological and psychophysical proof of osseoperception is accumulating, histomorphometric evidence for the neural mechanisms of functional compensation following immediate and delayed implant loading is still lacking. For this randomized split-mouth study, six mongrel dogs randomly received one of four treatment protocols at 36 implant-recipient sites over 16 weeks （third maxillary incisor, third and fourth mandibular premolar）： immediate implant placement and immediate loading （liP＋ IL）; delayed implant placement and delayed loading （DIP＋DL）; delayed implant placement and immediate loading （DIP＋IL）; and natural extraction socket healing （control）. Histomorphometry was performed in the peri-implant bone and soft tissues within 300 pm around the implants. Immunocytochemistry and transmission electron microscopy were used to confirm the presence of neural structures and to reveal their ultrastructural characteristics, respectively. Myelinated nerve fibres densely populated the peri-implant crestal gingival and apical regions, although they were also identified in the woven bone and in the osteons near the implant threads. Compared with the control group in the mandible, the group that received IIP＋IL showed a higher innervation （in ***^-2, 5.94±1.12 vs. 3.15±0.63, P〈0.001） and smaller fibre diameter （in pm, 1.37±0.05 vs. 1.64±0.13, P=0.016）, smaller axon diameter （in pm, 0.89±0.05 vs. 1.24±0,10, P=0.009） and g-ratio （0.64±0.04 vs. 0.76±0.05, P〈0.001） in the middle region around the implants. Compared with DIP＋IL in the mandible, IIP＋IL had a higher nerve density （in ***^-2, 13.23±2.54 vs. 9.64±1.86, P=0.027）, greater fibre diameter （in pm, 1.32±0.02 vs. 1.20±0.04, P=0.021）, greater axon diameter （in μm, 0.92±0.01 vs. 0.89±0.03, P=-0.035） and lower g-ratio （0.69±0.01 vs. 0.74±0.01, P=-0.033） in the apical region around the implants. It may be assumed that the treatment protocol with liP＋ IL is the preferred method to allow optimized peri-implant re-i

关键词： animal experiments dental implants histomorphometry immediate loading mechanoreceptor myelinated nerve fibres osseoperception

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 Fingerprint Minutiae Matching Method Based on Line Segment Vector

引用

Journal of Electronic Science and Technology of China 2007年第3期5卷 260-263页

作者： jian-wei zhong Mei Xie with School of Electronic Engineering University of Electronic Science and Technology of China （UESTC） Chengdu 610054 China

Minutiae-based fingerprint matching is the most commonly used in an automatic fingerprint identification system. In this paper, we propose a minutia matching method based on line segment vector. This method uses all the detected minutiae （the ridge ending and the ridge bifurcation） in a fingerprint image to create a set of new vectors （line segment vector）. Using these vectors, we can determine a truer reference point more efficiently. In addition, this new minutiae vector can also increase the accuracy of the minutiae matching. By experiment on the public domain collections of fingerprint images fvc2004 DID set A and DB4 set A, the result shows that our algorithm can obtain an improved verification performance.

关键词： Fingerprint line segment vector matching minutiae.

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 Comparison of Brain Death Criteria between China and the United States

引用

Chinese Medical Journal 2015年第21期128卷 2896-2901页

作者： Ze-Yu Ding Qian Zhang jian-wei Wu zhong-Hua Yang Xing-Quan Zhao Department of Neurology Beijing Tiantan Hospital Capital Medical University China National Clinical Research Center for Neurological Diseases Center of Stroke Beijing Institute for Brain Disorders Beijing Key Laboratory of Translational Medicine for Cerebrovascular Disease Beijing 100050 China

Background： Criteria for determining brain death （BD） vary between China and the United States. We reported the results of an investigation designed to compare procedures to determine BD in two countries. Methods： The latest criteria in the United states were published in 2010. The latest criteria in China were published in 2009. We used these two types of BD criteria to evaluate patients who were considered to be BD. The time, cost, and accuracy of the diagnosis were compared. Results： From January 1, 2012 to October 8, 2013, there were 37 patients which were applied for BD evaluation in the Neurological Intensive Care Unit of Beijing Tiantan Hospital. The cause of coma were known as subarachnoid hemorrhage （18 patients, 48.6%）, intracerebral hemorrhage （8 patients, 21.6%）, cerebral ischemia （9 patients, 24.3%）, brain stem tumor （1 patient, 2.7%）, and intracranial infection （1 patient, 2.7%）. The clinical examinations were done for all of the patients except 1 patient who had low blood pressure. Three patients had hrainstem reflexes that were excluded from BD. Twenty-five patients had apnea tests, and 20 tests were completed that were all positive. Confirmatory tests were completed differently： Transcranial Doppler （30 patients, positive rate 86.7%）, electroencephalogram （25 patients, positive rate 100%）, and somatosensory evoked potential （16 patients, positive rate 100%）. Thirty-three patients were diagnosed BD by criteria of the United States. Only 9 patients were diagnosed BD by Chinese criteria. The use of time and money in the USA criteria was obviously fewer than those in Chinese criteria （P = 0.000）. Conclusion： Compared with BD criteria of the United States, Chinese criteria were stricter, lower positive rate, more cost in money and time, and more reliable by families and doctors.

关键词： Apnea Test Brain Death Criteria China Diagnosis the United States

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

Apparently Recovering Breath Function in Brain Death

引用

Chinese Medical Journal 2015年第21期128卷 2969-2971页

Brain death （BD） is that someone＇s brain stops functioning, even though their heart may be kept beating using a machine. After brain function had ceased, somatic function being sustained by mechanical ventilation tbr a long time. Further treatment is inappropriate in a dead patient. Hence, in many countries, the law provides that treatment can be legitimately removed from a patient who was diagnosed BD and the donation of organs for transplantation can start.

关键词： Apnea Test Brain Death Cardiogenic Oscillation Mechanical Ventilation Patient-trigger Mode

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

NUMERICAL SIMULATION AND EXPERIMENTAL INVESTIGATION OF THE GUIDE-VANE FLOW AND THE INFLUENCE FROM THE LEAKAGE FLOW

引用

Journal of Hydrodynamics 2003年第1期15卷 103-110页

作者： Liaowei-li Lijian-zhong InstituteofwaterResourcesandHydroelectricEngineering Xi＇anUniversityofTechnologyXi＇an710048China InstituteofwaterResourcesandHydroelectricEngineering Xi＇anUniversityofTechnologyXi＇an710048China

This paper presents numerical and experimental results of the flow in the tipclearance region of the guide vane row in hydraulic turbine. The 3-D Navier-Stokes equations wereemployed to model the flow in end clearance region of guide vane cascade, the Reynolds stressdifferential model was used for turbulence closure, and the body-fitted curvilinear coordinates andthe SIMPLE! algorithm were adopted. The governing equations were discretized with the non-staggeredgrids by means of the finite volume method. Detailed comparison of hydrodynamical characteristics ofguide vane in hydraulic turbine with or without tip gap was made. Special attention was paid to theinfluence of leakage flow on the main flow and to the movement of tip leakage flow in the end guidevane. The position and strength of the roll-vortex on the sides of guide vane in were *** numerical solutions agree with the experimental results obtained by particle image *** results help to clarify the loss, wear and cavi-tation erosion between the guide vane andrings, especially for those used in the Yellow River which has a high sediment content.

关键词： leakage flow guide vane reynolds stress differential model

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

现代企业管理制度五方联动设计模式研究

引用

商业研究 2006年第7期 84-89页

作者：魏建中西安交通大学管理学院陕西西安710049

现代企业管理的显著特征是要求尽可能地减少随意性人治,实施规范的制度化管理。然而,如何科学、合理地设计和制定一套既全面、完备、整体配套,又能适应市场环境变化,充分激励人力资源潜能的制度组合问题,必须从分析我国现实企业管理制... 详细信息

现代企业管理的显著特征是要求尽可能地减少随意性人治,实施规范的制度化管理。然而,如何科学、合理地设计和制定一套既全面、完备、整体配套,又能适应市场环境变化,充分激励人力资源潜能的制度组合问题,必须从分析我国现实企业管理制度设计和制定中存在的问题入手,综合分析企业发展战略规划、企业业务流程重组、企业生产经营环节管理程序、岗位职责规范和人力资源的激励与约束及其相互联系,才能系统地进行企业管理制度的整体联动设计模式。

关键词：企业管理制度联动设计模式

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

关于GB/T 6394—2002《金属平均晶粒度测定方法》中附录C的分析说明

引用

金属热处理 2008年第6期33卷 117-119页

作者：宗斌王二平魏建忠北京工业大学材料学院北京100022

通过对GB/T 6394-2002《金属平均晶粒度测定方法》中附录C的分析、说明,指出在标准文本中存在许多有待商榷的部分、段落和文字。

关键词：晶粒度奥氏体晶界原奥氏体晶界术语基本概念

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

侗族古俗文化的生态伦理意蕴及其现代启示

引用

贵州民族研究 2014年第9期35卷 41-44页

作者：魏建中吴波怀化学院湖南省民间非物质文化研究基地湖南怀化418008

侗族的传统古俗文化,主要体现在以"萨"为中心的民间多神信仰、丰富多彩的民间大歌、以鼓楼和风雨桥为特色的建筑等方面。侗族的古俗文化蕴含着丰富的生态伦理观念和环保习俗,体现了一种处理人与自然关系的生态大智慧。这种智慧自觉或不... 详细信息

侗族的传统古俗文化,主要体现在以"萨"为中心的民间多神信仰、丰富多彩的民间大歌、以鼓楼和风雨桥为特色的建筑等方面。侗族的古俗文化蕴含着丰富的生态伦理观念和环保习俗,体现了一种处理人与自然关系的生态大智慧。这种智慧自觉或不自觉地维护着侗族地区人与自然的和谐,有效地促进了地区的生态保护。探析侗族古俗文化的生态伦理意蕴,对于现代社会从更深广的人类精神生活层面来思考解决生态问题的办法具有重要启示。

关键词：侗族古俗文化生态伦理人与自然

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

猪链球菌毒力因子研究进展

引用

动物医学进展 2014年第8期35卷 95-99页

作者：马建华魏建忠安徽农业大学动物科技学院安徽合肥230000

猪链球菌病是由猪链球菌引起的一种人畜共患病,不仅给养猪业的健康发展造成极大的危害,还严重威胁着人类的公共卫生安全,已经引起人们的高度重视。目前,发现和鉴定新的毒力因子成为国内外猪链球菌研究的重点。论文主要对猪链球菌相关毒... 详细信息

猪链球菌病是由猪链球菌引起的一种人畜共患病,不仅给养猪业的健康发展造成极大的危害,还严重威胁着人类的公共卫生安全,已经引起人们的高度重视。目前,发现和鉴定新的毒力因子成为国内外猪链球菌研究的重点。论文主要对猪链球菌相关毒力因子荚膜多糖、溶菌酶释放蛋白、胞外因子、溶血素及近几年新发现的相关毒力因子荚膜唾液酸、Cbp40、VirA、pgdA、Trag、溶血素相关基因、CiaRH、CcpA、TroA进行综述。通过总结毒力因子对猪链球菌致病机理的影响,以期为猪链球菌病的治疗及疫苗的研制提供理论基础。

关键词：猪链球菌毒力因子致病机制

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

化学气相沉积法制备钨管性能研究

引用

兵工学报 2011年第6期32卷 703-706页

作者：马捷魏建忠王从曾范爱玲北京工业大学材料科学与工程学院北京100124

以WF6、H2为原料,采用化学气相沉积法沉积制备出不同直径难熔金属钨管。对不同沉积温度(500℃,600℃,700℃)沉积制备钨管的纯度、密度、显微硬度、残余应力及钨管强度进行了测试与分析研究。研究结果表明:沉积制备钨管具有高纯度和高致... 详细信息

以WF6、H2为原料,采用化学气相沉积法沉积制备出不同直径难熔金属钨管。对不同沉积温度(500℃,600℃,700℃)沉积制备钨管的纯度、密度、显微硬度、残余应力及钨管强度进行了测试与分析研究。研究结果表明:沉积制备钨管具有高纯度和高致密度;随着沉积温度、钨管半径(3～20 mm)不同,显微硬度值在500～800 HV之间;沿钨管圆周、半径方向存在较大残余应力;抗拉强度范围在300～500 MPa.

关键词：金属材料化学气相沉积钨组织性能

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：