检索结果-南通市图书馆

Review on dynamic analysis of road pavements under moving vehicles and plane strain conditions

Journal of Road Engineering 2024年第1期4卷 54-68页

作者： edmond v.muho Niki D.Beskou Department of Disaster Mitigation for Structures Tongji UniversityShanghai 200092China Department of Civil Engineering University of the PeloponnesePatras 26334Greece School of Science and Technology Hellenic Open UniversityPatras 26335Greece

This paper reviews works on the dynamic analysis of flexible and rigid pavements under moving vehicles on the basis of continuum-based plane strain models and linear *** purpose of this review is to provide in-formation about the existing works on the subject,critically discuss them and make suggestions for further *** reviewed papers are presented on the basis of the various models for pavement-vehicle systems and the various methods for dynamically analyzing these *** pavements are modeled by a homogeneous or layered half-plane with isotropic or anisotropic and linear elastic,viscoelastic or poroelastic material *** pavements are modeled by a beam or plate on a homogeneous or layered half-plane with material properties like the ones for flexible *** vehicles are modeled as concentrated or distributed over a finite area loads moving with constant or time dependent *** above pavement-vehicle models are dynamically analyzed by analytical,analytical/numerical or purely numerical methods working in the time or frequency *** examples are presented to illustrate the models and methods of analysis,demonstrate their merits and assess the effects of the various parameters on pavement *** paper closes with con-clusions and suggestions for further research in the *** significance of this research effort has to do with the presentation of the existing literature on the subject in a critical and easy to understand way with the aid of representative examples and the identification of new research areas.

关键词： Flexible pavements Rigid pavements Moving vehicles Plane strain models Dynamic analysis

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

混凝土框架结构整体与局部延性相关性研究

引用

华中科技大学学报（自然科学版） 2018年第7期46卷 1-6页

作者：骈超钱江 edmond v.muho Dimitri E.Beskos 同济大学结构工程与防灾研究所上海200092 同济大学土木工程防灾国家重点实验室上海200092 佩特雷大学土木工程学院希腊佩特雷26504

基于38个钢筋混凝土框架结构在100条地震波作用下的增量动力分析（IDA）得到的结构响应数据库,分析了影响结构整体位移延性需求和局部延性需求（局部转角延性、层间位移角延性）之间定量关系的主要因素,研究了混凝土框架结构在地震作用... 详细信息

基于38个钢筋混凝土框架结构在100条地震波作用下的增量动力分析（IDA）得到的结构响应数据库,分析了影响结构整体位移延性需求和局部延性需求（局部转角延性、层间位移角延性）之间定量关系的主要因素,研究了混凝土框架结构在地震作用下最大转角延性需求的分布情况,并通过非线性回归分析拟合得到钢筋混凝土框架结构整体延性系数和局部延性系数之间的函数关系表达式.收集现有文献中11组关于钢筋混凝土框架结构整体延性系数和局部延性系数的试验数据,与表达式得到的延性值进行对比,验证了该表达式可以用于评估实际钢筋混凝土框架结构整体及局部延性.

关键词：整体延性局部延性转角延性层间位移角延性钢筋混凝土框架

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

The MDOF equivalent linear system and its applications in seismic analysis and design of framed structures

引用

Resilient Cities and Structures 2024年第4期3卷 107-125页

作者： E.v.muho N.A.Kalapodis G.A.Papagiannopoulos D.E.Beskos Department of Disaster Mitigation for Structures Tongji UniversityShanghai 200092China School of Sciences and Technology Hellenic Open UniversityPatras 26335Greece Department of Civil Engineering University of Patras.Patras 26504Greece

This paper reviews the applications of the multi degree-of-freedom(MDOF)equivalent linear system in seismic analysis and design of planar steel and reinforced concrete framed *** equivalent MDOF linear structure,analogous to the original MDOF nonlinear structure,is constructed,which has the same mass and elastic stiffness as the original structure and modal damping ratios that account for the effects of geometrical and material *** equivalence implies a balance between the viscous damping work of the equivalent linear structure and that of the nonlinearities in the original nonlinear *** work balance is established with the aid of a transfer function in the frequency ***,equivalent modal damping ratios can be explicitly determined in terms of the period and deformation levels of the structure as well as the soil *** of these equivalent modal damping ratios can help address a variety of seismic analysis and design problems associated with planar steel and reinforced concrete framed structures in a rational and accurate *** include force-based seismic design with the aid of acceleration response spectra characterized by high amounts of damping,improved direct displacement-based seismic design and the development of advanced seismic intensity *** equivalent modal damping ratios are also utilized in the context of linear modal analysis for the definition and construction of the MDOF response ***,the equivalent modal damping ratios are employed in a seismic retrofit method for steel-framed structures with viscous ***,it is demonstrated that modal behavior(or strength reduction)factors can be easily constructed based on these modal damping ratios for a more rational and accurate force-based seismic design,including the determination of inelastic displacement profiles.

关键词： Seismic analysis Seismic design Steel-framed structures Reinforced concrete-framed structures MDOF equivalent linear system Modal damping ratios Modal strength reduction factors Seismic intensity measures MDOF response spectrum

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

Bionic MEMS for Touching and Hearing Sensations: Recent Progress, Challenges, and Solutions

引用

Journal of Bionic Engineering 2022年第3期19卷 590-615页

作者： Chang Ge edmond Cretu Department of Electrical and Computer Engineering The University of British ColumbiaVancouverBCV6T 1Z4Canada

This paper reviews the recent progress on bionic microelectromechanical systems(MEMS)used for touching and hearing sensations,focusing on the following three types of devices:MEMS tactile sensors,MEMS directional microphones,and MEMS vector *** reviewing the electromechanical coupling principles,design,and performance of these MEMS devices,the authors conclude that it is vital for future research efforts in bionic MEMS to focus more on microfabrication *** development of robust microfabrication flows is the basis to implement hybrid electromechanical coupling principles based on novel functional ***-quality polymeric micromachining technologies can also significantly enhance the potential of existing bionic MEMS designs for more practical applications.

关键词： Bionic MEMS Tactile sensor Directional microphone vector hydrophone Polymeric micromachining PDMS SU-8

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

Robotic surgery for rectal cancer: Current immediate clinical and oncological outcomes

引用

World Journal of Gastroenterology 2014年第39期20卷 14359-14370页

作者： Sergio Eduardo Alonso Araujo victor edmond Seid Sidney Klajner Department of Gastroenterology University of Sao Paulo Medical School Sao Paulo (SP) 05403-000 Brazil Albert Einstein Hospital Sao Paulo (SP) 05652-901 Brazil

Laparoscopic rectal surgery continues to be a challenging operation associated to a steep learning curve. Robotic surgical systems have dramatically changed minimally invasive surgery. Three-dimensional, magnified and stable view, articulated instruments, and reduction of physiologic tremors leading to superior dexterity and ergonomics. Therefore, robotic platforms could potentially address limitations of laparoscopic rectal surgery. It was aimed at reviewing current literature on short-term clinical and oncological(pathological) outcomes after robotic rectal cancer surgery in comparison with laparoscopic surgery. A systematic review was performed for the period 2002 to 2014. A total of 1776 patients with rectal cancer underwent minimally invasive robotic treatment in 32 studies. After robotic and laparoscopic approach to oncologic rectal surgery, respectively, mean operating time varied from 192-385 min, and from 158-297 min; mean estimated blood loss was between 33 and 283 mL, and between 127 and 300 mL; mean length of stay varied from 4-10 d; and from 6-15 d. Conversion after robotic rectal surgery varied from 0% to 9.4%, and from 0 to 22% after laparoscopy. There was no difference between robotic(0%-41.3%) and laparoscopic(5.5%-29.3%) surgery regarding morbidity and anastomotic complications(respectively, 0%-13.5%, and 0%-11.1%). Regarding immediate oncologic outcomes, respectively among robotic and laparoscopic cases, positive circumferential margins varied from 0% to 7.5%, and from 0% to 8.8%; the mean number of retrieved lymph nodes was between 10 and 20, and between 11 and 21; and the mean distal resection margin was from 0.8 to 4.7 cm, and from 1.9 to 4.5 cm. Robotic rectal cancer surgery is being undertaken by experienced surgeons. However, the quality of the assembled evidence does not support definite conclusions about most studies variables. Robotic rectal cancer surgery is associated to increased costs and operating time. It also seems to be associated

关键词： Surgical procedures Minimally invasive Rectal neoplasms Robotics Colorectal surgery

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 Modeling of the Behaviour of a Road Structure on Compressible Soil: Case of the Road Section at the Beau-Rivage-Djassin Intersection

引用

Open Journal of Civil Engineering 2023年第2期13卷 326-341页

作者： Yémalin Daniel Agossou Judicael Agbelele Peace Hounkpe Daniel Djossou Wilfried Hode edmond Adjovi L2EGC/ENSTP-Abomey Materials and Structure Team National University of Sciences Technologies Engineering and Mathematics Abomey Benin ENSET Lokossa National University of Sciences Technologies Engineering and Mathematics Lokossa Benin HAS Engenering Conseils Abomey-Calavi Benin

This document presents a study of the behaviour of a pavement structure on compressible soil and the evaluation of its durability. The objective of this study is to highlight the impact of taking into account the non-linear elastic behaviour of soils and granular materials in the design process. To this end, a numerical modelling of the pavement of the beau-rivage-Djassin crossroads section in Porto-Novo was carried out, based on a compressible soil whose behaviour will be considered elastoplastic. The subgrade soil on the section is made up of several sub-layers. The layer of soft, highly plastic clay was modelled according to a modified Cam Clay behaviour, a model of swelling clay soils. The fine sand layer and the granular layers of the structure are modelled according to Mohr-Coulomb behaviour. The loading is considered to be uniformly distributed according to the assumptions of the Burmister model in the French standard. A first verification with ALIZE allowed to validate the structure on the basis of the rutting deformation at the head of the platform εz = 359.6*10-6 which remains lower than the admissible deformation εz,adm = 360*10-6. The numerical calculation was carried out using the finite element method, the code of which is implemented under the PLAXIS v21 software. A comparative study with the results of the ALIZE design revealed that the numerically calculated strains εz = 585*10-6 are higher than those of ALIZE. These numerical strains, which are higher than the elastic strains, do not meet the validation criteria that the strains under loading must remain below the allowable strains. An evaluation of the pavement durability was carried out and it was found that the pavement would only last under traffic for 3 years before the first fatigue deformations appeared.

关键词： MEF Elastoplastic Behaviour Modified Cam Clay Mohr Coulomb PLAXIS ALIZE

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

Effect of Water Stress Induced by Polyethylene Glycol 6000 on Somatic Embryogenesis in Cocoa (<i>Theobroma cacao</i>L.)

引用

Agricultural Sciences 2019年第9期10卷 1240-1254页

作者： Manlé Tokpapon Eliane Kouassi Kan Modeste Soumahoro Brahima André Koffi Kouablan edmond Koné Mongomaké Laboratoire Central de Biotechnologie (LCB) Centre National de Recherche Agronomique (CNRA) Abidjan C&#244 te d’Ivoire Laboratoire de Biologie et Amélioration des Productions végétales UFR Sciences de la Nature Université Nangui Abrogoua Abidjan C&#244 te d’Ivoire Laboratoire de Physiologie végétale Université Félix Houphou&#235 t-Boigny Abidjan C&#244 te d’Ivoire Section SvT Département des Sciences et Technologies Ecole Normale Supérieure d’Abidjan Abidjan C&#244 te d’Ivoire

Climate change, coupled with insufficient and irregular rains, led to a decline in the productivity of Ivorian cocoa production. The present study aimed to screen three cocoa (Theobroma cacao L.) genotypes in order to evaluate their response to water stress at callus and somatic embryos induction and proliferation stages. Staminode and petal explants of the genotypes C1, C14 and C16 from the collection of National Center of Agronomic Research (CNRA) of Ivory Coast, were placed on medium DKW (Driver & Kuniyuki Walnut) in the presence of different concentrations of Polyethylene glycol (PEG) 6000 (0, 25, 50, 75, 100 and 125 g/l). This polymer was used as osmoticum to stimulate water stress. Data were recorded for callus induction frequency, callus fresh weight, embryogenic callus percentage and average number of somatic embryos. The results obtained showed that intensity of callus proliferation decreased with increasing concentration of PEG 6000. In all genotypes tested, only the petal explants underwent somatic embryogenesis. The induction rates and average number of somatic embryos per explant were reduced with the increase in the concentration of PEG 6000. Among the tested genotypes, C1 produced somatic embryos with all concentrations of PEG 6000 and expressed highest frequencies of induction (62%) and average number of somatic embryos per explant (6.22). This genotype would be the most tolerant to water stress. Somatic embryos obtained with high concentrations of PEG 6000 in this study provide an important basis for the selection and further production of water stress-tolerant varieties of cocoa.

关键词： Water Stress Cocoa PEG 6000 Somatic Embryogenesis Selection

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

AUDI R8 v10 PLUS：寒雨天急行记

引用

汽车测试报告 2016年第6期 82-85页

作者： edmond LAU MANUFACTURER

日内瓦车展后，立即赶往慕尼黑拿了一台R8 v10 Plus和TTS Roadster试试。一天时间，朝九晚五，要赶往德国最高峰所在地。

关键词： v10 AUDI PLUS Roadster 雨天日内瓦车展 Plus 慕尼黑

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

我怀念的是…

引用

汽车测试报告 2013年第8期 86-89页

作者：陈欢 edmond Lau(图)

我怀念的是v10发动机，我怀念的是一起加速，我怀念的是怀疑以后还是有想要你的冲动。对了，直接讲清比较好，就是我喜欢上一代奥迪RS6远远多过这一代。原因呢？只有一个，就是它的v10双涡轮增压发动机。

关键词：涡轮增压发动机奥迪RS6 v10

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

Agreement and conversion formula between mini-mental state examination and montreal cognitive assessment in an outpatient sample

引用

World Journal of Psychiatry 2016年第3期6卷 358-364页

作者： Luqman Helmi David Meagher edmond O'Mahony Donagh O'Neill Owen Mulligan Sutha Murthy Geraldine McCarthy Dimitrios Adamis Sligo Medical Academy NUI Galway and Sligo/Leitrim Mental Health Services Cognitive Impairment Research Group Graduate Entry Medical SchoolUniversity of Limerick Department of Psychiatry University Hospital Limerick Sligo/Leitrim Mental Health Services

AIM To explore the agreement between the mini-mental state examination(MMSE) and montreal cognitive assessment(Mo CA) within community dwelling older patients attending an old age psychiatry service and to derive and test a conversion formula between the two *** Prospective study of consecutive patients attending outpatient *** tests were administered by the same researcher on the same day in random *** The total sample(n = 135) was randomly divided into two *** to derive a conversion rule(n = 70),and a second(n = 65) in which this rule was *** agreement(Pearson's r) of MMSE and Mo CA was 0.86(P verted to MMSE scores according to a conversion rule from the first sample which achieved agreement with the original MMSE scoresof 0.89(Pearson's r,P verlap considerably,the agreement is *** conversion rule derived herein demonstrated promising accuracy and warrants further testing in other populations.

关键词： Mini mental state examination Montreal cognitive assessment Cognition Equation Assessment Old age psychiatry

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

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：