Hybridizing waterborne transport: Modeling and simulation of low-emissions hybrid waterbuses for the city of Venice

Energy ◽  
2022 ◽  
pp. 123183
Author(s):  
Federico Miretti ◽  
Daniela Misul ◽  
Giulio Gennaro ◽  
Antonio Ferrari
Keyword(s):  
Modeling And Simulation ◽  
Transport Modeling ◽  
The City

scholarly journals Inverse transport modeling of volcanic sulfur dioxide emissions using large-scale simulations

2016 ◽  
Vol 9 (4) ◽  
pp. 1627-1645 ◽  
Author(s):  
Yi Heng ◽  
Lars Hoffmann ◽  
Sabine Griessbach ◽  
Thomas Rößler ◽  
Olaf Stein
Keyword(s):  
Time Series ◽  
Sulfur Dioxide ◽  
Modeling And Simulation ◽  
Inverse Modeling ◽  
Simulation System ◽  
Transport Modeling ◽  
Volcanic Emissions ◽  
Emission Time ◽  
Simulation Results ◽  
Inverse Transport

Abstract. An inverse transport modeling approach based on the concepts of sequential importance resampling and parallel computing is presented to reconstruct altitude-resolved time series of volcanic emissions, which often cannot be obtained directly with current measurement techniques. A new inverse modeling and simulation system, which implements the inversion approach with the Lagrangian transport model Massive-Parallel Trajectory Calculations (MPTRAC) is developed to provide reliable transport simulations of volcanic sulfur dioxide (SO2). In the inverse modeling system MPTRAC is used to perform two types of simulations, i.e., unit simulations for the reconstruction of volcanic emissions and final forward simulations. Both types of transport simulations are based on wind fields of the ERA-Interim meteorological reanalysis of the European Centre for Medium Range Weather Forecasts. The reconstruction of altitude-dependent SO2 emission time series is also based on Atmospheric InfraRed Sounder (AIRS) satellite observations. A case study for the eruption of the Nabro volcano, Eritrea, in June 2011, with complex emission patterns, is considered for method validation. Meteosat Visible and InfraRed Imager (MVIRI) near-real-time imagery data are used to validate the temporal development of the reconstructed emissions. Furthermore, the altitude distributions of the emission time series are compared with top and bottom altitude measurements of aerosol layers obtained by the Cloud–Aerosol Lidar with Orthogonal Polarization (CALIOP) and the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) satellite instruments. The final forward simulations provide detailed spatial and temporal information on the SO2 distributions of the Nabro eruption. By using the critical success index (CSI), the simulation results are evaluated with the AIRS observations. Compared to the results with an assumption of a constant flux of SO2 emissions, our inversion approach leads to an improvement of the mean CSI value from 8.1 to 21.4 % and the maximum CSI value from 32.3 to 52.4 %. The simulation results are also compared with those reported in other studies and good agreement is observed. Our new inverse modeling and simulation system is expected to become a useful tool to also study other volcanic eruption events.

scholarly journals Substantiationof a set of measures aimed at improving the traffic management on the Tyumen Ring Highway

2020 ◽  
Vol 17 (2) ◽  
pp. 181-186
Author(s):  
D. A. Zakharov ◽  
◽  
A. A. Fadyushin ◽  
D. A Zvezdin ◽  
◽  
...  
Keyword(s):  
Traffic Management ◽  
Transport Modeling ◽  
Ring Road ◽  
Transport Services ◽  
Effective Option ◽  
Micro Level ◽  
The City

The paper considers the option of improving the quality of transport services for the city of Tyumen residents by means of increasing the roadway capacity of the Tyumen Ring Highway. To select the most effective option, there was used transport modeling at the micro level. The analysis of changes in traffic parameters with the prohibition of through traffic at the intersection Bypass of the city of Tyumen - Avtoremontnaya and Troitskaya streets. Two options for organizing the entry from Internatsionalnaya Street to the overpass through the Trans-Siberian Railway in the alignment of the Tyumen Ring Road are considered.

scholarly journals Modeling and simulation of intermittent drying of high moisture foods

2018 ◽  
Author(s):  
Maria Aparecida Mauro ◽  
Ana Paula Filippin ◽  
Érika Fernanda Rezendes Tada ◽  
João Claudio Thomeo
Keyword(s):  
Experimental Data ◽  
Modeling And Simulation ◽  
Transport Modeling ◽  
High Moisture ◽  
Second Stage ◽  
Air Temperatures ◽  
Water Diffusivity ◽  
Finite Differences Method ◽  
Mass Transport Modeling ◽  
Two Stages

This study aimed at the modeling and simulation of intermittent drying to be applied to highly deformable moist foods such as apples. Mass transport modeling considered two stages: the first at 95, 85 and 75ºC air temperatures, and the second at 60ºC. The shrinkage was correlated with the sample moisture and included in the model that was solved by the finite differences method. The first stage temperatures affected the water diffusivity in the second stage. This model was suitable for simulating the water profiles during the two-stage intermittent drying, showing an efficient fitting to the experimental data. Keywords: thermal intermittence; coefficient diffusion effective; shrinkage; apple drying.  

scholarly journals Transport modeling in the development of a complex transport scheme on the example of the city of Kyiv (Ukraine)

2021 ◽  
Vol 3 (2(59)) ◽  
pp. 51-54
Author(s):  
Oleksandra Humeniuk ◽  
Oleksij Shapovalov
Keyword(s):  
Traffic Flow ◽  
Transport System ◽  
Public Transport ◽  
Road Transport ◽  
Transport Infrastructure ◽  
Transport Modeling ◽  
Qualitative Assessment ◽  
Main Task ◽  
Network Systems ◽  
The City

The object of research is a complex transport scheme using the example of the city of Kyiv (Ukraine). The comprehensive transport scheme of the city of Kyiv provides for a variant design of the city’s transport system. In transport planning and design, for a qualitative assessment of planning decisions, predictive transport models of cities are most often used, which describe the macroscopic parameters of the traffic flow. The proposed options were tested on a transport model. The main task of this model is the modeling of transport correspondence, where the volume of traffic by public transport is about 80-90 % of the total volume of traffic. For this, a model was developed, with the help of which the level of loading of the main network, the volume of transport work, and the total number of passengers carried by public transport were analyzed. When choosing the optimal option, let’s took into account such parameters as the average speed of the traffic flow, general transport delays, and the total number of passengers transported by public transport. As well as the average distance of travel, the average time for the implementation of transport correspondence on public transport, the cost of unproductive loss of time by residents of the city, and so on. Based on the results of transport modeling, the optimal option for the development of the city’s transport system was selected, which provides for the completion of the construction of existing road transport infrastructure facilities, the construction and development of the backbone network, systems outside the street rail transport, and optimization of the public transport route network. The complex transport scheme of the city of Kyiv, which was created using modern technologies in the field of transport modeling, allows to analyze and determine the effectiveness of the implementation of various measures for the development of the city’s transport infrastructure. Transport modeling has shown the feasibility of providing initial data for the feasibility study of investment projects, the arrangement of road transport infrastructure facilities, the improvement of traffic management schemes, the arrangement of new public transport routes.

Photosynthesis-inspired quantum transport modeling and simulation

2021 ◽  
Author(s):  
Fabienne Michelini ◽  
Omar Lahrache ◽  
Anne-Marie Daré ◽  
Nicolas Cavassilas ◽  
Dmitry Cherepanov ◽  
...  
Keyword(s):  
Modeling And Simulation ◽  
Quantum Transport ◽  
Transport Modeling
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