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Vehicle safety airbags can protect occupants from vehicle collisions, but there are still some shortcomings, thus need to be constantly improved. In occupant restraint system simulation, the establishment of a reasonable airbag model determines whether the simulation results are consistent with the actual test results. The aim of this study is to establish a precise airbag model for vehicle occupant...
For a given route, vehicle and time of departure we consider the problem of energy consumption prediction. It is of prime importance in eco-routing applications since prediction errors reflect heavily on its performance. The problem is nonlinear, nondeterministic and the information on which we can base these predictions is often sparse. We consider longitudinal vehicle consumption model of an ideal...
We present LOG2MODEL, an approach, supported by a tool, that builds behavioral models from log data. The logged data consists of time series encoding the values of the states of a system observed at discrete time steps. The models generated are Discrete-Time Markov Chains with states and transitions representing the values recorded in the log. The models contain key information that can be visualized...
The development of railway systems is often supported by a range of tools, each addressing individual, but overlapping concerns such as, e.g., performance or safety analysis. However, it is a challenge for users to organise work-flows; results are often in different, non-aligning data formats; furthermore, tools work on different levels of abstraction from macro to microscopic. Thus, tool integration...
The purpose of this work is to explore the possibility of using (Multi-disciplinary Design and Optimization) MDO frameworks for complex system design of space experiment. Considering both launch and space environmental requirements, the multi-objective optimization of a novel nested flying vehicle for space science experiments is carried out by decreasing launch weight, frequency response, vacuum...
An improved comfortable driving model with inter-vehicle communication (IVC) is proposed in this paper. Vehicles in our model can obtain more integrated driving information such as headway distance, brake light state and velocity through IVC. By taking a number of preceding vehicles' driving information into consideration, drivers can predict the next time-step velocity more reasonably and effectively...
The interest for the energetic optimization of railway systems is constantly increasing due to recent developments concerning Technological Standards and Regulations. A particular attention is usually paid to the coupling between the dynamical behaviour of railway vehicles and the electrical infrastructure, including all the subsystems related to energy distribution and storage. In this research work,...
The article presents a universal simulation model of the general unsignalized intersection consisting of three (T intersection) or four arms. Each arm can consist of up to 5 lanes. The model is based on gap acceptance theory which defines rules for entering the intersection. The simulation model is created using software Witness. The main advantage of the presented approach is that defining all the...
The accelerated growth of applications and services in intelligent transportation systems (ITS) are driven by interests from the public and private sectors. The intent to utilize the onboard resources, along with the advanced methods of managing the available computing capabilities in the conventional cloud, has led to the high popularity of Vehicular Clouds. Likewise in Vehicular Networks, vehicles...
Considering the sprawl of the cities, the conventional public transport (CPT) with fixed route and fixed schedule becomes less efficient and desirable every day. However, the emerging technologies in computation and communication are facilitating more adaptive types of public transport, such as Demand Responsive Transport (DRT) systems, which operate according to the demand. It is crucial to study...
The calculation of a ray's intercept from an arbitrary point in space to a prescribed surface is a common task in computer simulations. The arbitrary point often represents an object that is moving according to the simulation, while the prescribed surface is fixed in a defined frame. For detailed simulations, this surface becomes complex, taking the form of real-world objects such as mountains, craters...
A formal mathematical model of an Adaptive Cruise Controller (ACC)in SpaceEx is presented with a view to formally verify it to ensure its safety critical behavior. SpaceEx (an academic open source tool) is a hybrid systems modeling and verification platform which employs efficient implementation of reachability and safety verification algorithms which are scalable under certain assumptions, to circumvent...
Next-generation autonomous and semi-autonomous vehicles will not only precept the environment with their own sensors, but also communicate with other vehicles and surrounding infrastructures for vehicle safety and transportation efficiency. The design, analysis and validation of various vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) applications involve multiple layers, from V2V/V2I...
A typical feature of robotic architectures are its reactivity and self-adaptivity. In practice, this is achieved by context-dependent dynamic invocation of software components in robotic architectures. In this paper, we specifically address how this self-adaptation capability can be formally defined and modeled in an architecture-independent way. We propose a probabilistic approach that facilitates...
This paper reviews the various computer tools that have been reported for modeling the impacts of electrical vehicles on the power distribution grid. Forty four computer tools have been identified and summarised to facilitate selection of the most appropriate tools for specific tasks. Typical applications of the tools include vehicle design, analysis, control, grid integration and impact, market scheduling,...
Bluetooth devices on board of traffic objects depict an easy way of detecting motions of persons and goods. However, the precondition is that one Bluetooth device (the observer) discovers another Bluetooth device — namely the on board device — within a very short time range. Device discovery in case of Bluetooth connection establishment is heavily dependent from the so called inquiry process which...
Mathematic and simulation modeling is for an analysis, modeling and prediction of stochastic phenomena in the operation, maintenance, logistics, risk assessment very favorable, first of all for a possibility of monitoring through graphic outputs, which give more visual perception about stochastic processes.
Context: Continuous Improvement in manufacturing to attain manufacturing excellence is today's requirement. It gives cutting edge over the competitors. This has developed lot of interest for the researchers during the last few years. Vehicle Assembly Line being the most complex Assembly line has been active area of research over years and has attracted many researchers.
This paper reviews the traffic flow lattice model for road vehicle traffic flow, and describes its advantages and disadvantages; based on the research carried out by the authors, discusses the reality conformity of some model assumptions and puts forward some new insights and views.
Vehicle classification system is an important part of intelligent transportation system (ITS), which can provide us the necessary information for autonomous navigation, toll systems, surveillance and security systems, and transport planning. In this paper, we introduce a vehicle classification system based on dynamic Bayesian network (DBN). Three main types of features are employed in our system:...
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