Papers by Keyword: Transport

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Authors: Jozef Kačur, Jozef Minár
Abstract: We model the flow of the contaminated water through the porous media sample. We model the inflow of water, flux of water in the sample, flux of the contaminant in the water in the sample, adsorption of the contaminant in the sample and the outflow of the contaminated water from the sample. During the process, there appears fully saturated zone, partially saturated zone and dry zone. We consider Darcys law for flux of the water in fully saturated zone and Richards equation for flux in the partially saturated zone. Flux of the contaminant is governed by Ficks law and the adsorption of contaminant is modeled using Freundlich isotherm. Problem is solved in 1D using numerical solution based on the MOL method. Since flow of the water is independent of the contaminant, we compute separately saturation in the whole time interval and then contamination of water and adsorption of contaminant in the sample.
Authors: Alena Rybickova, Jakub Brodsky, Adela Karaskova, Denisa Mockova
Abstract: In this paper, we focus on the optimization of the system of the spare parts distribution for authorized garages in the Czech Republic. A spare parts market belongs to one of the key elements of the car industry. However, it has to adapt to still higher requirements on accuracy, speed and minimum error rate of the deliveries with keeping the costs at its minimum at the same time. The distribution of products from depots to customers is a practical and challenging problem in logistics that opens a significant space for application of software products.The design of optimal routes of vehicles from two depots can be formulated in combinatorial optimization as a multi-depot vehicle routing problem.The goal of a multi-depot vehicle routing problem is to design routes that start and end in one of the depots and visit a subset of customers in a specific sequence. Every customer has to be visited on one of the routes and the total costs for the delivery should be minimal.Vehicle routing problems belong to the class of NP-hard problems which means that there is no efficient algorithm for finding optimal solution available. To find a solution in an efficient way, we propose an approximate method based on a genetic algorithm.
Authors: Bing Hua Yao, Jie Zhao, Jin Fen Niu, Shuang Wang, Cheng Wang
Abstract: The transport of phenol (Ph-OH) and p-nitrophenol (p-NP) through a supported liquid membrane system based on hydrophobic ionic liquids ([BEIM][PF6]) (SILMs) consisting of polyvinylidene fluoride membrane (PVDF) as the liquid membrane support and sodium hydroxide solution as the strippping phase, has been studied. The effects of pH, ionic strength, initial concentration of phenol (or p-NP) in feed phase, concentration of sodium hydroxide in the stripping phase have also been investigated, respectively. The optimum transport conditions of phenol in the SILMs were that pH 3.5, ionic strength 0.2 mol/L, initial concentration of phenol 1.31×10-3 mol/L in feed phase, concentration of sodium hydroxide in stripping phase was 0.2 mol/L. The permeability value of phenol under above conditions was 2.0×10-5 m/s during the transport time of 120 min. The optimum transport conditions of p-NP in the SILMs were that pH 5.5, ionic strength 0.2 mol/L, initial concentration of p-NP 4.90×10-4 mol/L in feed phase, concentration of sodium hydroxide in stripping phase was 0.15 mol/L.The permeability value under above conditions was 8.6×10-6 m/s during the transport time of 120 min. The kinetic equations that can describe transport of phenol and p-NP through the SILMs were also obtained.
Authors: Ti Feng Liu, Cai Gao Ding, Fei Leng
Abstract: Assembled monolithic structure is a common structure in the process of housing industrialization, among which the composite plate is an indispensable element. The thickness of the precast slab of composite plate is small so special measures have to be adopted to prevent the excessive deformation even destruction occurred during hoisting or transport. A novel removable stiffness increasing device for precast slab is presented in this paper. The device consists of steel truss, upper steel plate and steel base plate and can effectively improve the performance of the slab during hoisting and transport. The device has the advantages of simple construction and no special equipment is necessary. The device can be removed after being hoisted and saving cost. The performance of the slab with the device during hoisting and transport is analyzed and appropriate shape parameters are suggested.
Authors: Fabio Casciati, Sara Casciati, Lucia Faravelli, Michele Vece
Abstract: The EU funded SPARTACUS project pursues the implementation of a small size, low-power consumption, tracking-unit integrating satellite receiver and antenna with terrestrial inertial sensors, enabling a dead reckoning functionality. In case of a good GNSS signal coverage, precise positioning and timing capabilities of the system are double-checked, while the positioning accuracy for dead reckoning has to be validated. In this paper, the results of field tests simulations are presented in order to validate the positioning performance in the absence of the GNSS signal. Two goals are pursued to secure tracking and functionalities customized for: (i) critical transport assets, and (ii) flow of relief support goods from the sending side to the receiving place.
Authors: Sébastien Garruchet, Tony Montesin, H. Sabar, M. Salazar, G. Bertrand
Authors: Radek Havlik, Alena Gottwaldova, Jan Vavruška
Abstract: This paper deals with research in area 3D digitalization of large objects. Application of 3D scanners for transportation is not common. Digitalized area is a final placement for new machines. Final location and transport way for machines is in very a low ceiling room. Using the 3D data we can determine an optimal way for transport. In next step we define optimal final placement for CNC machine tools. If we have 3D model from 3D scanner we can measure the height between the floor and ceiling.
Authors: Chang Liu, Ya Dan Li, Shou Wen Ji
Abstract: This paper introduces the basic properties of the explosive dangerous goods and the matters needing attention during the transport process. It also designs the monitoring system for transport process based on the technology of the Internet of things, including the route choice subsystem, the set out audit subsystem and the en-route item state supervision subsystem. Finally it analyzes the function and the operation process of the transportation monitoring system and the application of RFID in the system.
Authors: Jaroslava Kubanova, Miroslava Britanakova, Jan Lizbetin, Ondrej Stopka
Abstract: Purchasing and utilizing the vehicles is an important element of corporate logistics in the transport companies. Novel trends and customer requirements in terms of range and quality of received services of the carriers have continuous increase. This paper discusses about aspects influencing the utilization the environmentally friendly vehicles, in other words the motivation for their purchasing, in terms of toll charges for transport and logistics companies in the selected countries. This could be one of tools to maintain competitiveness of the particular company in the market. The paper is focused on description of selected elements regarding the future of alternative drive systems as well.
Authors: Nimish Mehta, Pushkar Limaye, Chaitanya Talnikar, Prathamesh Joshi
Abstract: This paper proposes a technology to automate the book deposition process in a generic Library layout. It includes usage of autonomous vehicle in the library that is guided by an assembly of lasers. To prove the practicability of this proposal a physical prototype of an autonomous robot has been developed. The robot acts as an external storage unit for books and is capable of delivering them from the initial pre-defined point to the desired final destination.
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