检索结果-南通市图书馆

Review and assessment of different perspectives of vehicle-pedestrian conflicts and crashes:Passive and active analysis approaches

引用

Journal of Traffic and Transportation Engineering(English Edition) 2021年第5期8卷 681-702页

作者： Abbas Sheykhfard Farshidreza Haghighi Eleonora Papadimitriou pieter van gelder Department of Civil Engineering Babol Noshirvani University of TechnologyMazandaran ***Iran Faculty of Technology Policy and ManagementDelft University of TechnologyDelft 2628 BXThe Netherlands

The importance of investigating pedestrian safety has been evaluated repeatedly in safety *** present study attempts to evaluate the various methods used by previous researchers in a hierarchical process,to determine the characteristics,advantages,and limitations of each *** general analysis approaches(passive and active) were taken into account to categorize 169 previous types of *** the passive approach,the studied methods were those based on crash databases,questionnaires,and post-crash field observation data;while,in the active approach,the studied methods were those based on driving simulations and *** result of the passive approach reveals that road users’ features and road characteristics(crash database studies),and error,lapses,intentional and unintentional violations(questionnaire studies) by them were among the most important causes of crashes and ***,road users’ distractions also reported a set of factors affecting the possibility of conflicts and crashes based on postcrash field observation ***,results of the active approach showed that risky behaviors are the most important factor in threatening pedestrian safety such as unauthorized speeding,non-compliance with traffic law,unauthorized overtaking by drivers,and illegal ***,risk perception and decision-making processes are the mostimportant bond between the attitude and behavior of road users in dangerous driving *** studies through passive approach would lead to identifying the causes of crashes,recognizing the attitude of road users towards safety,and determining road users’ behavioral patterns in certain situations,while the active approach has led to a more detailed understanding of behaviors and attitudes of road *** inference of the findings obtained in this study will lead to a better understanding of the behavior of road users for studies on advanced driving assistance systems(ADAS).

关键词： Traffic engineering Conflict Pedestrian Naturalistic driving study Crash Road safety

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

Bayesian network model to distinguish between intentional attacks and accidental technical failures:a case study of floodgates

引用

Cybersecurity 2021年第1期4卷 442-460页

作者： Sabarathinam Chockalingam Wolter pieters AndréTeixeira pieter van gelder Faculty of Technology Policy and ManagementDelft University of TechnologyDelftThe Netherlands Department of Risk Safety and SecurityInstitute for Energy TechnologyHaldenNorway Behavioural Science Institute Radboud UniversityNijmegenThe Netherlands Department of Electrical Engineering Uppsala UniversityUppsalaSweden

Water management infrastructures such as floodgates are critical and increasingly operated by Industrial Control Systems(ICS).These systems are becoming more connected to the internet,either directly or through the corporate *** makes them vulnerable to *** behaviour in floodgates operated by ICS could be caused by both(intentional)attacks and(accidental)technical *** operators notice abnormal behaviour,they should be able to distinguish between those two causes to take appropriate measures,because for example replacing a sensor in case of intentional incorrect sensor measurements would be ineffective and would not block corresponding the attack *** the previous work,we developed the attack-failure distinguisher framework for constructing Bayesian Network(BN)models to enable operators to distinguish between those two causes,including the knowledge elicitation method to construct the directed acyclic graph and conditional probability tables of BN *** a full case study of the attack-failure distinguisher framework,this paper presents a BN model constructed to distinguish between attacks and technical failures for the problem of incorrect sensor measurements in floodgates,addressing the problem of floodgate *** utilised experts who associate themselves with the safety and/or security community to construct the BN model and validate the qualitative part of constructed BN *** constructed BN model is usable in water management infrastructures to distinguish between intentional attacks and accidental technical failures in case of incorrect sensor *** could help to decide on appropriate response strategies and avoid further complications in case of incorrect sensor measurements.

关键词： Bayesian network DeMorgan model Intentional attack Probability elicitation Safety Security Technical failure Water management

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

Tuning thermal release kinetics of soy oil from organic nanoparticles using variable synthesis conditions

引用

Particuology 2016年第3期14卷 54-65页

作者： pieter Samyn Dieter van Nieuwkerke Vibhore Rastogi Dirk Stanssens University of Freiburg Freiburg Research Institute for Advances Studies (FRIAS) Faculty for Environment and Natural Resources Chair of Bio-based Materials Engineering Werthmannstrasse 6 D-79085 Freiburg Germany Ghent University Department of Textiles Technologiepark 907 B-9052 Zwijnaarde Belgium Topehim N.K Nijverheidsstraat 98 B-2160 Wommelgem Belgium

The thermal release properties of soy oil from poly（styrene-co-maleimide） nanoparticles containing 50 wt% encapsulated oil have been quantified as a function of temperature and time. The effects of dif- ferent synthesis conditions on the thermal stability of the nanoparticles and their oil release have been evaluated, i.e., by gradually increasing the amount of ammonium hydroxide used for the imidization of poly（styrene-co-maleic anhydride）. First, the intrinsic thermal properties of the oil-filled nanoparti- cles were analysed by differential scanning calorimetry, which revealed an exothermal reaction related to the oil release and a suppression of the glass transition that may be masked owing to the complex structure of the hybrid nanoparticles. The isothermal scans showed different rates of oil release after a post-imidization reaction. The oil release was better followed by dynamic mechanical analysis, which illustrated changes in visco-elastic properties expressed by the maximum in the loss factor that related to the amount of released oil. Depending on the amount of ammonium hydroxide, the oil started to release below the glass transition temperature at various rates. Thermal release profiles of the oil we re quantified by infrared and Raman spectrocopy after heating for 2 min to 6 h at 125 to 250 ℃, based on variations in oil-related and imide-related absorption bands. The oil release increased below and above the glass transition temperature, following a parabolic trend, and progressively decreased at higher ammonium hydroxide concentrations, in parallel with higher imide content and changes in imide conformation. The kinetics and mechanism of the oil release can be described by the Korsmeyer-Peppas model, suggesting a dominating diffusion mechanism that is influenced by further imidization of the polymer matrix during heating.

关键词： Soy oil Nanoparticle Encapsulation Release

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

More bricks in the wall against SARS-CoV-2 infection:involvement of γ9δ2 T cells

引用

Cellular & Molecular Immunology 2020年第7期17卷 771-772页

作者： Ger Rijkers Trees Vervenne pieter van der Pol St.Elisabeth Hospital TilburgThe Netherlands Admiral De Ruyter Hospital GoesThe Netherlands Science Department University College RooseveltMiddelburgThe Netherlands

The SARS-CoV-2 virus which emerged in late December 2019 had reached pandemic proportions by March 2020.1 Host defence mechanisms against this new member of the corona virus family will include innate immunity,humoral,and cellular immune responses,of yet unknown relative *** CD8^(+) αβTCR cytotoxic T cells and natural killer cells are mainly responsible for detection and elimination of virus infected cells,with a special role for the CD94/NK group 2 member A(NKG2A)receptor as reported by Zheng et *** this journal.2,3 We want to report yet another brick in the wall against SARS-CoV-2 infection,made of a subset of γδTCR T cells.

关键词： NKG2A involvement infection

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

Impact of dams on flood occurrence of selected rivers in the United States

引用

Frontiers of Earth Science 2017年第2期11卷 268-282页

作者： Xuefei MEI P.H.A.J.M. van gelder Zhijun DAI Zhenghong TANG State Key Laboratory of Estuarine & Coastal Research East China Normal University Shanghai 200062 China Faculty of Technology Policy and Management Delft University of Technology 2628BX Delft the Netherlands Community and Regional Planning Program University of Nebraska-Lincoln Lincoln NE 68588-0105 USA

A significant large number of dams have been constructed in the past two centuries in the United States. These dams＇ ability to regulate downstream flooding has received world-wide attention. In this study, data from 38 rivers distributed over the entire conterminous Untied States with extensive pre- and post-dam annual peak discharge records, were collected to research the impacts of various dams on the flood behaviors at a national scale. The results indicate that dams have led to significant reductions in flood magnitude for nearly all of the sites; the decrease rate in the mean of annual peak discharge varies between 7.4% and 95.14%, except for the Dead River, which increased by 1.46%. Because of dams＇ effective- ness, the probability density curve of annual peak flow changes from a flat to peaked shape because both the range and magnitude of high discharges are decreased. More- over, the potential impact of dams on flood characteristics were closely related to the dam＇s geographic location and function, the ratio of the storage capacity of the dam to the mean annual runoff of the river （C/R）, and the ratio of reservoir storage capacity to the area of its drainage （C/D）. Specifically, the effects of dams on annual peak flows were more related to latitude than longitude. Compared with dams built for other purposes, the dam exclusively used for flood management cut off more flood peaks. Increases in the ratios of C/R and C/D increased the degree of modification of annual maximum discharge.

关键词： flood characteristics river discharge dam,flood modification

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

Extending the dynamic temperature range of Boltzmann thermometers

引用

Light(Science & Applications) 2022年第12期11卷 3069-3079页

作者： Thomas pieter van Swieten Jesse Merlijin Steenhoff Auke Vlasblom Ravi de Berg Sam pieter Mattern Freddy Teunis Rabouw Markus Suta Andries Meijerink Debye Institute for Nanomaterials Science Utrecht UniversityPrincetonplein 13584 CC UtrechtThe Netherlands Inorganic Photoactive Materials Heinrich Heine University DüsseldorfUniversitätsstraBe 140225 DüsseldorfGermany

Lanthanide-doped(nano)crystals are an important class of materials in luminescence *** working mechanism of these thermometers is diverse but most often relies on variation of the ratio of emission intensities from two thermally coupled excited states with *** low temperatures,nonradiative coupling between the states can be slow compared to radiative decay,but,at higher temperatures,the two states reach thermal equilibrium due to faster nonradiative *** thermal equilibrium,the intensity ratio follows Boltzmann statistics,which gives a convenient model to calibrate the ***,we investigate multiple strategies to shift the onset of thermal equilibrium to lower temperatures,which enables Boltzmann thermometry in a wider dynamic *** use Eu^(3+)-doped microcrystals as a model system and find that the nonradiative coupling rates increase for host lattices with higher vibrational energies and shorter lanthanide-ligand distances,which reduces the onset temperature of thermal equilibrium by more than 400 *** additionally reveal that thermometers with excited states coupled by electricdipole transitions have lower onset temperatures than those with magnetic-dipole-coupled states due to selection *** insights provide essential guidelines for the optimization of Boltzmann thermometers to operate in an extended temperature range.

关键词： equilibrium excited dynamic

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

Stem cells for cardiac repair: an introduction

引用

Journal of Geriatric Cardiology 2013年第2期10卷 186-197页

作者： Bastiaan C du Pr(e) pieter A Doevendans Linda W van Laake Departments of Cardiology and Medical Physiology Division of Heart and Lungs University Medical Center Utrecht P.O. box 85500 3508 GA Utrecht the Netherlands Departments of Cardiology and Medical Physiology Division of Heart and Lungs University Medical Center Utrecht P.O. box 85500 3508 GA Utrecht the Netherlands Inter university Cardiology Institute of the Netherlands P.O. box 19258 2501 DG Utrecht the Netherlands Departments of Cardiology and Medical Physiology Division of Heart and Lungs University Medical Center Utrecht P.O. box 85500 3508 GA Utrecht the Netherlands Hubrecht Institute P.O box 85164 3508 AD Utrecht the Netherlands

Cardiovascular disease is a major cause of morbidity and mortality throughout the world. Most cardiovascular diseases, such as ischemic heart disease and cardiomyopathy, are associated with loss of functional cardiomyocytes. Unfortunately, the heart has a limited regenerative capacity and is not able to replace these cardiomyocytes once lost. In recent years, stem cells have been put forward as a potential source for cardiac regeneration. Pre-clinical studies that use stem cell-derived cardiac cells show promising results. The mechanisms,though, are not well understood, results have been variable, sometimes transient in the long term, and often without a mechanistic *** are still severalmajor hurdles to be taken. Stem cell-derived cardiac cells should resemble original cardiac cell types and be able to integrate in the damaged heart. Integration requires administration of stem cell-derived cardiac cells at the right time using the right mode of delivery. Once delivered, transplanted cells need vascularization, electrophysiological coupling with the injured heart, and prevention of immunological rejection. Finally, stem cell therapy needs to be safe, reproducible, and affordable. In this review, we will give an introduction to the principles of stem cell based cardiac repair.

关键词： Cardiomyocytes Heart Regeneration Stem cell

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 New Quantitative Method for Studying the Vulnerability of Civil Aviation Network System to Spatially Localized Hazards

引用

International Journal of Disaster Risk Science 2016年第3期7卷 245-256页

作者： Hang Li Xiao-Bing Hu Xiaomei Guo Zhen Xu P.H.A.J.M.van gelder Academy of Disaster Reduction and Emergency Management Beijing Normal University State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal University Faculty of Technology Policy and Management Delft University of Technology School of Engineering University of Warwick

As an important infrastructure system, civil aviation network system can be severely affected by natural hazards. Although a natural hazard is usually local, its impact, through the network topology, can become *** by Wilkinson's work in 2012, this article proposes a new quantitative spatial vulnerability model for network systems, which emphasizes the spreading impact of spatially localized hazards on these systems. This model considers hazard location and area covered by a hazard,and spatially spreading impact of the hazard(including direct impact and indirect impact through network topology) and proposes an absolute spatial vulnerability index and a relative spatial vulnerability index to reflect the vulnerability of a network system to local hazards. The model is then applied to study the spatial vulnerability of the Chinese civil aviation network system. The simulation results show that(1) the proposed model is effective and useful to study spatial vulnerability of civil aviation network systems as the results well explain the general situation of the Chinese civil aviation system; and(2) the Chinese civil aviation network system is highly vulnerable to local hazards when indirect impacts through network connections are considered.

关键词： Civil aviation Network system Spatially localized hazards Vulnerability

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

Quantum dot lasing from a waterproof and stretchable polymer film

引用

Light(Science & Applications) 2022年第10期11卷 2435-2443页

作者： Mohammad Mohammadimasoudi pieter Geiregat Frederik van Acker Jeroen Beeckman Zeger Hens Tangi Aubert Kristiaan Neyts Nano-Bio-Photonics Lab Faculty of New Sciences and TechnologiesUniversity of TehranTehranIran Liquid Crystals and Photonics Group ELIS DepartmentGhent UniversityTechnologiepark-Zwijnaarde 1269052 ZwijnaardeBelgium Physics and Chemistry of Nanostructures Department of ChemistryGhent UniversityGhentBelgium Center for Nano-and Biophotonics(NB-Photonics) Ghent UniversityTechnologiepark-Zwijnaarde 1269052 ZwijnaardeBelgium

Colloidal quantum dots(QDs)are excellent optical gain materials that combine high material gain,a strong absorption of pump light,stability under strong light exposure and a suitability for solution-based *** integration of QDs in laser cavities that fully exploit the potential of these emerging optical materials remains,however,a *** this work,we report on a vertical cavity surface emitting laser,which consists of a thin film of QDs embedded between two layers of polymerized chiral liquid *** directed,circularly polarized defect mode lasing under nanosecond-pulsed excitation is demonstrated within the photonic band gap of the chiral liquid *** and long-term narrow-linewidth lasing of an exfoliated free-standing,flexible film under water is obtained at room ***,we show that the lasing wavelength of this flexible cavity shifts under influence of pressure,strain or *** such,the combination of solution processable and stable inorganic QDs with high chiral liquid crystal reflectivity and effective polymer encapsulation leads to a flexible device with long operational lifetime,that can be immersed in different protic solvents to act as a sensor.

关键词： lasing film polymer

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

One hundred marathons in 100 days:Unique biomechanical signature and the evolution of force characteristics and bone density

引用

Journal of Sport and Health Science 2022年第3期11卷 347-357页

作者： pieter van den Berghe Bastiaan Breine Ella Haeck Dirk De Clercq Department of Movement and Sports Sciences Ghent UniversityGhent 9000Belgium

Background:An extraordinary long-term running performance may benefit from low dynamic loads and a high load-bearing *** extraordinary runner(age=55 years,height=1.81 m,mass=92 kg) scheduled a marathon a day for 100 consecutive *** running biomechanics and bone density were investigated to better understand successful long-term running in the master ***:Overground running gait analysis and bone densitometry were conducted before the marathon-a-day challenge and near its *** case’s running biomechanics were compared pre-challenge to 31 runners who were matched by a similar foot strike ***:The case’s peak vertical loading rate(Δx=-61.9 body weight(BW)/s or-57%),peak vertical ground reaction force(Δx=-0.38 BW or-15%),and peak braking force(Δx=-0.118 BW or-31%) were remarkably lower(p<0.05) than the control group at~3.3 m/*** relatively low loading-related magnitudes were attributed to a remarkably high duty factor(0.41) at the evaluated *** foot strike angle of the marathoner(29.5°) was greater than that of the control group,affecting the peak vertical loading *** powers in the lower extremity were also remarkably low in the case ***:peak power of knee absorption(Δx=-9.16 watt/kg or-48%) and ankle generation(Δx=-3.17 watt/kg or-30%).The bone mineral density increased to 1.245 g/cm;(+2.98%) near completion of the challenge,whereas the force characteristics showed no statistically significant ***:The remarkable pattern of the high-mileage runner may be useful in developing or evaluating load-shifting strategies in distance running.

关键词： Bone Gait analysis Ground reaction force Load Running

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：