scholarly journals Research on the Prepositive Distance of Crosswalk Warning Markings for Unsignalized Road Section

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Guohua Liang ◽  
Fangfang Wang ◽  
Quan Shi ◽  
Rui Li ◽  
Zhijing Ji ◽  
...  
Keyword(s):  
Mathematical Modelling ◽  
Simulation Experiment ◽  
Driving Simulator ◽  
Simulation Experiments ◽  
Speed Reduction ◽  
Slowing Down ◽  
Road Section ◽  
The Times ◽  
Set Up ◽  
Maximum Deceleration

This paper proposed an optimal prepositive distance of crosswalk warning markings for unsignalized road section under three different design speeds based on the mathematical modelling and driving simulation. To set up the most efficient mathematical modelling for calculating the layout interval of prepositive distance, the vehicles slowing down behaviour characteristics in front of crosswalk were explored. According to the layout interval, the simulation experiment was carried out in the UC-win/Road version 13.0 driving simulator. The rate of speed reduction and the times of maximum deceleration obtained from simulation experiments were selected as evaluation indicators to compare and analyse the deceleration effect related with the prepositive distances of the crosswalk warning markings under three design speeds. The results show that when the design speeds are 30 km/h, 40 km/h, and 50 km/h, the optimal prepositive distances of the crosswalk warning markings are 30 m, 40 m, and 60 m, respectively.

scholarly journals Application of intelligent orienteering based on Internet of things

2020 ◽  
Vol 2020 (1) ◽  
Author(s):  
Donghui Zhang ◽  
Ruijie Liu
Keyword(s):  
Internet Of Things ◽  
Network Architecture ◽  
Emergency Services ◽  
Simulation Experiment ◽  
Experimental Studies ◽  
Signal Stability ◽  
Anchor Nodes ◽  
Set Up ◽  
The Relationship ◽  
The Internet Of Things

Abstract Orienteering has gradually changed from a professional sport to a civilian sport. Especially in recent years, orienteering has been widely popularized. Many colleges and universities in China have also set up this course. With the improvement of people’s living conditions, orienteering has really become a leisure sport in modern people’s life. The reduced difficulty of sports enables more people to participate, but it also exposes a series of problems. As the existing positioning technology is relatively backward, the progress in personnel tracking, emergency services, and other aspects is slow. To solve these problems, a new intelligent orienteering application system is developed based on the Internet of things. ZigBee network architecture is adopted in the system. ZigBee is the mainstream scheme in the current wireless sensor network technology, which has many advantages such as convenient carrying, low power consumption, and signal stability. Due to the complex communication environment in mobile signal, the collected information is processed by signal amplification and signal anti-interference technology. By adding anti-interference devices, video isolators and other devices, the signal is guaranteed to the maximum extent. In order to verify the actual effect of this system, through a number of experimental studies including the relationship between error and traffic radius and the relationship between coverage and the number of anchor nodes, the data shows that the scheme studied in this paper has a greater improvement in comprehensive performance than the traditional scheme, significantly improving the accuracy and coverage. Especially the coverage is close to 100% in the simulation experiment. This research has achieved good results and can be widely used in orienteering training and competition.

Research on Outdoor Positioning Based on Ray Tracing Method

2014 ◽  
Vol 556-562 ◽  
pp. 3039-3042
Author(s):  
Xian Qiang Peng
Keyword(s):  
Wave Propagation ◽  
Ray Tracing ◽  
Radio Waves ◽  
Complex Environment ◽  
Simulation Experiments ◽  
Outdoor Environments ◽  
Positioning Method ◽  
Tracking Point ◽  
Set Up ◽  
Tracing Method

GPS can’t detect the signal because of the cell complex environment in the outdoor and poor radio wave propagation conditions, so that the positioning result is not ideal. However, the positioning method using the ray tracing prediction of radio waves, the tracking point of the scene from all the source radiation, record the relevant parameters, and then positioned within the microcell environment can satisfy the demand. The principle of ray tracing was firstly introduced in this paper, then an outdoor positioning model was set up, finally, the corresponding simulation experiments was implemented to demonstrate the effectiveness of ray tracing positioning in the outdoor environments.

scholarly journals Innovation and Entrepreneurship Education and Teaching Based on “Internet+” Research and Exploratio

2019 ◽  
Vol 3 (2) ◽  
pp. 113
Author(s):  
Hongyan Pei
Keyword(s):  
Education Reform ◽  
Entrepreneurship Education ◽  
Social Background ◽  
Colleges And Universities ◽  
The State ◽  
Educational Goals ◽  
State Council ◽  
The Times ◽  
Set Up ◽  
Innovation And Entrepreneurship

<p>In order to promote mass entrepreneurship and innovation, the General Office of the State Council issued the implementation opinions on deepening innovation and entrepreneurship education reform in institutions of higher learning. According to the guidelines for innovation and entrepreneurship proposed by the State Council, colleges and universities should combine the entrepreneurial needs of students and the innovative needs of the society, set up educational goals around the orientation of running a school, and carry out educational reform activities with innovation and entrepreneurship as the theme. Based on the overall social background of "Interne+" and distinct characteristics of the times, this paper analyzes the problems existing in innovation and entrepreneurship education in colleges and universities, and explores effective strategies for implementing innovation and entrepreneurship education in colleges and universities.</p>

scholarly journals Fragrance Impact on Driving Performance

2016 ◽  
Vol 2 (5) ◽  
pp. 21
Author(s):  
Masria Mustafa ◽  
Norazni Rustam ◽  
Rosfaiizah Siran
Keyword(s):  
Open Access ◽  
Peer Review ◽  
Driving Simulator ◽  
Human Subjects ◽  
Publishing House ◽  
Driving Performance ◽  
Speed Reduction ◽  
International Publishing ◽  
Open Access Article

Previous studies have indicated that certain types of fragrance in the vehicle are useful in keeping the driver alert. This study was conducted to evaluate the effect of lavender or vanilla flavor fragrances toward driving performance. Ten human subjects were tested using the driving simulator in three different conditions; driving with vanilla, lavender flavor fragrance and driving without fragrance. A questionnaire was distributed to examine the emotion states of the driver after driving the simulator. Our results indicate that fragrance did not affect the speed reduction. The emotions of the drivers were calm due to the presence of the fragrance.2398-4279 © 2017 The Authors. Published for AMER ABRA by e-International Publishing House, Ltd., UK. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer–review under responsibility of AMER (Association of Malaysian Environment-Behaviour Researchers), ABRA (Association of Behavioural Researchers on Asians) and cE-Bs (Centre for Environment-Behaviour Studies), Faculty of Architecture, Planning & Surveying, UniversitiTeknologi MARA, Malaysia.Keywords: driving performance, vehicle fragrance, speed reduction

scholarly journals The simulation experiment description markup language (SED-ML): language specification for level 1 version 4

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Lucian P. Smith ◽  
Frank T. Bergmann ◽  
Alan Garny ◽  
Tomáš Helikar ◽  
Jonathan Karr ◽  
...  
Keyword(s):  
Simulation Experiment ◽  
Computational Simulation ◽  
Spatial Models ◽  
Software Tools ◽  
Stochastic Simulations ◽  
Biological Research ◽  
Simulation Experiments ◽  
Additional Information ◽  
Parameter Estimations ◽  
Level 1

Abstract Computational simulation experiments increasingly inform modern biological research, and bring with them the need to provide ways to annotate, archive, share and reproduce the experiments performed. These simulations increasingly require extensive collaboration among modelers, experimentalists, and engineers. The Minimum Information About a Simulation Experiment (MIASE) guidelines outline the information needed to share simulation experiments. SED-ML is a computer-readable format for the information outlined by MIASE, created as a community project and supported by many investigators and software tools. The first versions of SED-ML focused on deterministic and stochastic simulations of models. Level 1 Version 4 of SED-ML substantially expands these capabilities to cover additional types of models, model languages, parameter estimations, simulations and analyses of models, and analyses and visualizations of simulation results. To facilitate consistent practices across the community, Level 1 Version 4 also more clearly describes the use of SED-ML constructs, and includes numerous concrete validation rules. SED-ML is supported by a growing ecosystem of investigators, model languages, and software tools, including eight languages for constraint-based, kinetic, qualitative, rule-based, and spatial models, over 20 simulation tools, visual editors, model repositories, and validators. Additional information about SED-ML is available at https://sed-ml.org/.

scholarly journals Evolution of the Industrial Innovation Ecosystem of Resource-Based Cities (RBCs): A Case Study of Shanxi Province, China

2021 ◽  
Vol 13 (20) ◽  
pp. 11350
Author(s):  
Jun Yao ◽  
Huajing Li ◽  
Di Shang ◽  
Luyang Ding
Keyword(s):  
Positive Impact ◽  
Shanxi Province ◽  
Innovation Ecosystem ◽  
Obvious Effect ◽  
Industrial Innovation ◽  
Management Level ◽  
Effective Strategies ◽  
Slowing Down ◽  
Set Up ◽  
Technology Level

Constructing and exploring the evolution mechanism of an industrial innovation ecosystem in resource-based cities (RBCs) is the most effective way to solve the contradiction between economic development, energy shortage, and environmental degradation. Taking 10 typical RBCs in Shanxi Province as examples, this paper used the method of system dynamics (SD) to build a model of the industrial innovation ecosystem of RBCs and set up scenarios to simulate and predict the evolution of the industrial innovation ecosystem of RBCs. The results showed that the industrial innovation ecosystem of RBCs is a complex system composed of four subsystems: innovation players, innovation content, innovation resources, and innovation environment. In innovation players, the increase in the amount of talent has a more obvious effect on technology level and GDP than R&D funding. In innovation content, the improvement of management level has a slow and continuous positive impact on GDP. Technology achievements, once implemented, will improve GDP more than management progress does. In innovation resources, human capital has greater potential for an increase in GDP and per capita consumption expenditure. In innovation resources, technology level plays an important role in slowing down the deterioration of the ecological environment. This study enriched the theoretical paradigm of the research on the industrial innovation ecosystem, and provided effective strategies to solve the development problems of RBCs.

Impact of river weirs on bedload dynamics in low to medium energy rivers

2021 ◽  
Author(s):  
Vincent Tamisier ◽  
Frédéric Gob ◽  
Emmanuèle Gautier ◽  
Geoffrey Houbrechts ◽  
Thomas Dépret
Keyword(s):  
The Other ◽  
Bed Load ◽  
Medium Energy ◽  
Pit Tags ◽  
Slowing Down ◽  
Return Interval ◽  
Ecological Continuity ◽  
European Regulations ◽  
Set Up ◽  
The Impact

&lt;p&gt;Assessing the impact of weirs in low- to medium-energy rivers, especially their influence on the bedload continuity, is an important issue for the understanding and management of river hydrosystems. The implementation of European regulations has for example led to an increasing number of restoration projects involving the total or partial dismantling of weirs. The effect of weirs on sedimentary continuity is beginning to be studied but remains poorly understood. In this study we present the results of monitoring over three hydrological seasons of 900 particles equipped with PIT tags set up around two weirs on the Rognon river (France) and the Ambl&amp;#232;ve river (Belgium). For the two sites studied, and while floods were relatively frequent (max 5 return-interval years for the Rognon River and 2 return-interval years for the Ambl&amp;#232;ve River), nearly 80% of the tagged particles positioned just upstream of the weirs were exported downstream of them during the study period. However, the tagged particles in the control reaches, non-influenced by weirs, travelled distances 2 to 2.5 times greater than the particles injected in the impoundment. Mobilisation rates are also significantly higher in the control reaches. Whereas the size of the mobilised particles (D50, D90) is similar between the impoundment and the control reaches in the Ambl&amp;#232;ve river, mobilised particles are significantly smaller in the impoundment reach in the Rognon river. This data indicates that these weirs can have a significant effect by slowing down the bed load velocity, especially its coarsest part. Nevertheless, in the current weir operating, weirs do not interrupt the bedload continuity. This type of structure does not seem to constitute a real obstacle to sedimentary continuity and the question of their dismantling may be raised in view of the potential impacts they could have on the other components of ecological continuity.&lt;/p&gt;

Improving Teachers' Digital Competence to Bridge the Language Gap

2020 ◽  
pp. 67-82
Author(s):  
Manuela Caravello ◽  
Cristina A. Huertas-Abril ◽  
María Elena Gómez-Parra
Keyword(s):  
Flipped Classroom ◽  
Language Teachers ◽  
Basic Knowledge ◽  
Digital Competence ◽  
Foreign Language Teachers ◽  
Digital Innovation ◽  
Knowledge And Skills ◽  
Digital Skills ◽  
The Times ◽  
Set Up

This chapter aims to examine the digital skills that foreign language teachers must have in our global interconnected society and the ways in which they can acquire them. Pedagogical and digital innovation has been traveling along the same lines for some time. In recent years, however, in all fields of education—and more specifically in the didactic of foreign languages—several methods and techniques that increase the use of digital technology have been developed. Consequently, all teachers must keep up with the times. In this light, the objective of this chapter is to reflect on the pedagogical scenario that the digital age has set up, as well as on the ideal portrait that teachers must have. Then, the authors will focus on the specific digital skills that teachers who want to “flip” their teaching process should have: What are the basic knowledge and skills that a teacher must master if they wish to rethink their practices and embark on a flipped classroom approach?

The Nursery of Life

2030 ◽  
2010 ◽  
Author(s):  
Rutger van Santen ◽  
Djan Khoe ◽  
Bram Vermeer
Keyword(s):  
Health Care ◽  
New Technology ◽  
Medical Knowledge ◽  
Human Beings ◽  
Slowing Down ◽  
Cost Of Health Care ◽  
Precise Diagnosis ◽  
Set Up ◽  
The Cost ◽  
Prompt Diagnosis

Human beings are much more complex than any technology we could devise today. How many machines are good for 80 or 90 years of service? Our immune system—set up at birth—is able to repel diseases that don’t even exist yet. Most viruses that proliferate 50 years after we were born can be defeated just as easily as maladies that have been dogging humans for generations. Effective health care means that—in most regions of the planet—we are living longer and longer. All the same, human beings are not perfect: We get sick and we wear out over time. In the wealthier regions, we spend a great deal of money trying to get as close as possible to a 100-year span. Our greatest task is to bring a long and healthy life within the reach of as many people as possible. New technology is required to hold down the cost of health care, to nip outbreaks of disease in the bud, and to ease discomfort in our old age. Scientists believe that substantial benefits can be gained by identifying abnormalities earlier. A cancerous growth measuring just a few millimeters is still relatively harmless, and an infection caught in its early stages won’t leave any scars. Although techniques for accurately diagnosing incipient abnormalities can often be very expensive, prompt diagnosis generally means that treatment will be easier, cheaper, and more likely to succeed. Thus, we can end up saving money despite the need for expensive equipment. To adequately fight the outbreak of diseases in the future, our technology must be able to respond more rapidly. This could pose a particular challenge because there is also a trend at present toward superspecialization, which is fragmenting medical knowledge and slowing down responses. Take the science of ophthalmology in which the various specializations focus on extremely specific parts of the eye. This is fine once a precise diagnosis has been made, but it could be a significant problem if the patient consults the wrong doctor at the outset. The way we currently approach diagnosis needs to change.

scholarly journals Comparative Analysis of Splash Erosion Devices for Rainfall Simulation Experiments: A Laboratory Study

Water ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1228 ◽  
Author(s):  
María Fernández-Raga ◽  
Julián Campo ◽  
Jesús Rodrigo-Comino ◽  
Saskia D. Keesstra
Keyword(s):  
Rainfall Simulation ◽  
Key Factors ◽  
Erosion Process ◽  
Rain Intensity ◽  
Significant Relation ◽  
Simulation Experiments ◽  
Rainfall Characteristics ◽  
Splash Erosion ◽  
Simulated Rain ◽  
Set Up

For the study of soil erosion it is important to set up the experiments well. In the experimental design one of the key factors is the choice of the measurement device. This is especially important when one part of the erosion process needs to be isolated, such as for splash erosion. Therefore, the main aim of this research is to list the general characteristics of the commonly used splash erosion devices and to discuss the performance, to be able to relate them, and make suggestions regarding their use. The devices we selected for this comparative comparison were: the splash cup, funnel, Morgan tray, Tübingen cup, tower, and the gutter. The devices were tested under the same conditions (rainfall characteristics, slope, and soil type) to assess their hydrological response under different intensities of simulated rainfall. All devices were installed on a sloping plot (10°) with sandy soil, and were exposed to 10 min. of simulated rain with intensities ranging from 60 to 172 mm/h to measure the splashed sediment, and to describe problems and differences among them. The results showed that the Tübingen cup was the best performing device to measure kinetic energy of the rain, but, because of its design, it is not possible to measure the detached splashed sediment under natural (field) conditions. On the other hand, the funnel device showed a significant relation with rain intensity because it loses little sediment to washing. In addition, the device is easy to use and cheap. Therefore, this device is highly recommended to estimated splash erosion. to the good performance measuring the actual splash erosion, because it loses little sediment by washing. The device is also cheap and easy to install and manage.

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