Relevant bibliographies by topics / Transport network density

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Transport network density'

Author: Grafiati
Published: 30 May 2022
Last updated: 31 July 2025

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Journal articles on the topic "Transport network density"

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Ding, Heng, Hanyu Yuan, Xiaoyan Zheng, Hanyue Ma, and Haijian Bai. "SPATIAL PARTITION FOR HETEROGENEOUS CITY NETWORKS COMPOSED OF FACTORS THAT INFLUENCE THE DISTRIBUTION OF THE MACROSCOPIC FUNDAMENTAL DIAGRAM." Transport 38, no. 3 (2023): 152–64. http://dx.doi.org/10.3846/transport.2023.20424.

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Using a Macroscopic Fundamental Diagram (MFD) to implement partition control is effective in improving mobility in heterogeneous city networks. As one of the most complex issues in partition control, accurate sub-region partition is critical for control effectiveness. Current partition methods focus on the link density and precondition of existing MFD and disregard the factors that influence MFD distribution. To overcome this drawback, this study uses the characteristic value of the link and the intersection connected to the link as the analysis object and proposes an MFD sub-region partitioni
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Shariat-Mohaymany, Afshin, and Mohsen Babaei. "AN APPROXIMATE RELIABILITY EVALUATION METHOD FOR IMPROVING TRANSPORTATION NETWORK PERFORMANCE." TRANSPORT 25, no. 2 (2010): 193–202. http://dx.doi.org/10.3846/transport.2010.24.

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Considering the importance of maintaining network performance at desired levels under uncertainty, network reliability, as a new approach to assessing the performance of degradable urban transportation networks, has become increasingly developed in two recent decades. In this paper, a method for optimizing resource allocation to meet the required levels of transportation network reliability is proposed. The worked out method consists of two stages: at stage one, a method for computing the reliability of network connectivity based on the reliability of computing arc performance with an assumpti
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Jacobs-Crisioni, Chris, Lewis Dijkstra, and Andrius Kučas. "Does Density Foster Shorter Public Transport Networks? A Network Expansion Simulation Approach." Land 13, no. 1 (2024): 77. http://dx.doi.org/10.3390/land13010077.

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One argument for containing urban densities is that cities need a critical population density to sustain sufficiently available public transportation. However, the question of whether denser cities foster shorter public transport networks empirically is problematic because real-world transport nets are a product of many additional factors presumably not related to urban form. This paper adopts a network expansion simulation approach to generate and analyze counterfactual data on network lengths for 36 world cities, in which all networks are generated with similar expansion restrictions and obj
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Lombardo, Andrew T., Shane R. Nelson, Guy G. Kennedy, Kathleen M. Trybus, Sam Walcott, and David M. Warshaw. "Myosin Va transport of liposomes in three-dimensional actin networks is modulated by actin filament density, position, and polarity." Proceedings of the National Academy of Sciences 116, no. 17 (2019): 8326–35. http://dx.doi.org/10.1073/pnas.1901176116.

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The cell’s dense 3D actin filament network presents numerous challenges to vesicular transport by teams of myosin Va (MyoVa) molecular motors. These teams must navigate their cargo through diverse actin structures ranging from Arp2/3-branched lamellipodial networks to the dense, unbranched cortical networks. To define how actin filament network organization affects MyoVa cargo transport, we created two different 3D actin networks in vitro. One network was comprised of randomly oriented, unbranched actin filaments; the other was comprised of Arp2/3-branched actin filaments, which effectively po
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TADIĆ, BOSILJKA, G. J. RODGERS, and STEFAN THURNER. "TRANSPORT ON COMPLEX NETWORKS: FLOW, JAMMING AND OPTIMIZATION." International Journal of Bifurcation and Chaos 17, no. 07 (2007): 2363–85. http://dx.doi.org/10.1142/s0218127407018452.

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Many transport processes on networks depend crucially on the underlying network geometry, although the exact relationship between the structure of the network and the properties of transport processes remain elusive. In this paper, we address this question by using numerical models in which both structure and dynamics are controlled systematically. We consider the traffic of information packets that include driving, searching and queuing. We present the results of extensive simulations on two classes of networks; a correlated cyclic scale-free network and an uncorrelated homogeneous weakly clu
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Lee, Jeong-Seok, Tae-Hoon Kim, and Yong-Gil Park. "Maritime Transport Network in Korea: Spatial-Temporal Density and Path Planning." Journal of Marine Science and Engineering 11, no. 12 (2023): 2364. http://dx.doi.org/10.3390/jmse11122364.

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The increase in maritime traffic and vessel size has strengthened the need for economical and safe maritime transportation networks. Currently, ship path planning is based on past experience and shortest route usage. However, the increasing complexity of the marine environment and the development of autonomous ships require automatic shortest path generation based on maritime traffic networks. This paper proposes an efficient shortest path planning method using Dijkstra’s algorithm based on a maritime traffic network dataset created by extracting maritime traffic routes through a spatial-tempo
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Hossain, Tanvir, Aladdin Riad, Shaila Siddiqi, Sampath Parthasarathy, and Shadab A. Siddiqi. "Mature VLDL triggers the biogenesis of a distinct vesicle from the trans-Golgi network for its export to the plasma membrane." Biochemical Journal 459, no. 1 (2014): 47–58. http://dx.doi.org/10.1042/bj20131215.

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We have identified a novel vesicle that transports mature very-low-density lipoproteins from the trans-Golgi network to the plasma membrane. Identification of this vesicle provides new insight into the mechanism that regulates the post-Golgi transport of mature very-low-density lipoproteins.
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Aleshkin, Anton. "The Influence of Transport Link Density on Conductivity If Junctions and/or Links Are Blocked." Mathematics 9, no. 11 (2021): 1278. http://dx.doi.org/10.3390/math9111278.

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This paper examines some approaches to modeling and managing traffic flows in modern megapolises and proposes using the methods and approaches of the percolation theory. The author sets the task of determining the properties of the transport network (percolation threshold) when designing such networks, based on the calculation of network parameters (average number of connections per crossroads, road network density). Particular attention is paid to the planarity and nonplanarity of the road transport network. Algorithms for building a planar random network (for modeling purposes) and calculati
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Yevhen, Fornalchyk, Vikovych Ihor, Royko Yurii, and Hrytsun Oleh. "Improvement of methods for assessing the effectiveness of dedicated lanes for public transport." Eastern-European Journal of Enterprise Technologies 1, no. 3(109) (2021): 29–37. https://doi.org/10.15587/1729-4061.2021.225397.

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There are different configurations of street and road networks in cities, which is why those transportation models that determine how effectively a public transport network is operated are different. Along with this, some transport areas may have characteristic features predetermined by the density of a street network, the intensity of individual and public traffic. The special feature of the current study is determining the operational effectiveness of dedicated lanes for public transport given a significant density of the main street and road network. Significant density is characterized by
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TADIĆ, BOSILJKA, and G. J. RODGERS. "PACKET TRANSPORT ON SCALE-FREE NETWORKS." Advances in Complex Systems 05, no. 04 (2002): 445–56. http://dx.doi.org/10.1142/s021952590200064x.

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We introduce a model of information packet transport on networks in which the packets are posted by a given rate and move in parallel according to a local search algorithm. By performing a number of simulations we investigate the major kinetic properties of the transport as a function of the network geometry, the packet input rate and the buffer size. We find long-range correlations in the power spectra of arriving packet density and the network's activity bursts. The packet transit time distribution shows a power-law dependence with average transit time increasing with network size. This impl
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Dissertations / Theses on the topic "Transport network density"

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Мірошнікова, Юлія Олексіївна, та Julia Miroshnikova. "Підходи до оцінки рівня розвитку транспортної інфраструктури". Thesis, Національний авіаційний університет, 2021. https://er.nau.edu.ua/handle/NAU/50474.

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Науковий керівник - асистент кафедри ОАРП Чередніченко К.В.<br>В усі часи транспорт відіграє надзвичайно важливу роль у становленні людської цивілізації, виконуючи економічну, соціально-політичну, культурну та оборонну функцію. Для високоефективної перевізної діяльності необхідна повна узгодженість дій протягом процесу перевезення, наявність засобів роботи з пасажирами та вантажем, варіативність маршруту і багато чого іншого, що, в свою чергу, говорить про існування більш масштабної, багатофункціональної, цілісної системи, яка називається транспортна інфраструктура.
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Batshon, Hussam George. "Coded Modulation for High Speed Optical Transport Networks." Diss., The University of Arizona, 2010. http://hdl.handle.net/10150/194075.

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At a time where almost 1.75 billion people around the world use the Internet on a regular basis, optical communication over optical fibers that is used in long distance and high demand applications has to be capable of providing higher communication speed and re-liability. In recent years, strong demand is driving the dense wavelength division multip-lexing network upgrade from 10 Gb/s per channel to more spectrally-efficient 40 Gb/s or 100 Gb/s per wavelength channel, and beyond. The 100 Gb/s Ethernet is currently under standardization, and in a couple of years 1 Tb/s Ethernet is going to be
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Zou, Ding, and Ding Zou. "FPGA-Based LDPC Coded Modulations for Optical Transport Networks." Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/622985.

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Current coherent optical transmission systems focus on single carrier solutions for 400Gb/s serial transmission to support traffic growth in fiber-optics communications, together with a few subcarriers multiplexed solutions for the 1 Tb/s serial data rates and beyond. With the advancement of analog-to-digital converter technologies, high order modulation formats up to 64-QAM with symbol rate up to 72Gbaud have been demonstrated experimentally with Raman amplification. To enable such high serial data rates, it is highly desirable to implement in hardware low complexity digital signal processi
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Zou, Ding, and Ivan B. Djordjevic. "An FPGA design of generalized low-density parity-check codes for rate-adaptive optical transport networks." SPIE-INT SOC OPTICAL ENGINEERING, 2016. http://hdl.handle.net/10150/621801.

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Forward error correction (FEC) is as one of the key technologies enabling the next-generation high-speed fiber optical communications. In this paper, we propose a rate-adaptive scheme using a class of generalized low-density parity-check (GLDPC) codes with a Hamming code as local code. We show that with the proposed unified GLDPC decoder architecture, a variable net coding gains (NCGs) can be achieved with no error floor at BER down to 10(-15), making it a viable solution in the next-generation high-speed fiber optical communications.
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Drevelle, Matthieu. "Desservir les faibles densités par les transports collectifs routiers : des réseaux aux prises avec le territoire." Thesis, Paris 1, 2015. http://www.theses.fr/2015PA010634.

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Discutant la thèse d’un périurbain indifférencié, cette thèse cherche à définir les différences spatiales entre les couronnes périurbaines françaises et à identifier l’impact de ces différences sur le coût de desserte des couronnes par les transports collectifs. Portant sur une centaine de couronnes périurbaines, l’étude de morphologie et de la granulométrie des ilots périurbains permet de classifier différents types de formes périurbaines et d’analyser leur répartition sur le territoire. Le croisement de cette typologie avec les coûts de desserte (selon différents scénarios) permet de mettre
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Bai, Lijie. "Ordonnancement des trains dans une gare complexe et à forte densité de circulation." Thesis, Ecole centrale de Lille, 2015. http://www.theses.fr/2015ECLI0017/document.

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Cette thèse porte sur l'ordonnancement des trains dans les gares complexes en forte densité de circulation. L'objet se situe à la réalisation d'un outil pour aider les managers de la gare à générer un tableau des horaires sans-conflits dans un journée. Le management des circulations ferroviaires dans la gare demande l'ordonnancement soigneux pour adapter les ressources limités, en évitant les conflits entre les trains et satisfaisant l'objectif et les politiques économiques et de la sécurité en même temps. D'après les méthodes appliquées en recherche opérationnelle et les expériences professio
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De, Fez Lava Ismael. "Evaluation of a content download service based on FLUTE and LDPC for improving the Quality of Experience over multicast wireless networks." Doctoral thesis, Editorial Universitat Politècnica de València, 2014. http://hdl.handle.net/10251/37051.

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Esta tesis estudia la distribución de ficheros en redes inalámbricas, analizando diferentes mecanismos que permiten optimizar la transmisión en términos de ancho de banda y calidad de experiencia. Concretamente, la tesis se centra en la transmisión de ficheros en canales multicast. Dicha transmisión resulta adecuada en ciertos entornos y tiene múltiples aplicaciones, algunas de las cuales se presentan en este trabajo. La tesis analiza en profundidad FLUTE (File Delivery over Unidirectional Transport), un protocolo para el envío fiable de ficheros en canales unidireccionales, y presen
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ROUBÍČKOVÁ, Zuzana. "Hodnocení dopravní dostupnosti ve Středočeském kraji." Master's thesis, 2010. http://www.nusl.cz/ntk/nusl-48182.

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Komusiński, Szymon. "Przekształcenia przestrzenne sieci pasażerskiego transportu kolejowego w Polsce w latach 1988-2008." Praca doktorska, 2010. http://ruj.uj.edu.pl/xmlui/handle/item/41514.

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Rodemund, Tom. "Electron Transport in Carbon-Based Networks." 2021. https://monarch.qucosa.de/id/qucosa%3A75265.

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Carbon-based conductors like carbon nanotubes (CNTs) and graphene nanoribbons (GNRs) have many properties, which make them relevant for potential electronic applications. Among them are high conductances and tunable band gap sizes. These properties make CNTs and GNRs useful in many circumstances, e.g. as channel material in transistors or transparent electrodes in solar cells. Plenty of literature can be found on the topic of single linear CNTs/GNRs. Some applications however require a large network of these conductors. In addition, a single conductor has only a small impact on the network co
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Books on the topic "Transport network density"

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Brautaset, Camilla. The quiet transport revolution: Returns to scale, scope and network density in Norway's nineteenth-century sailing fleet. University of Oxford, 2006.

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Scott, Peter. Failure to Accelerate. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198783817.003.0011.

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From an international perspective, the inter-war car industry was a British success story. Britain ranked only second to the United States as the world’s leading producer of, and market for, automobiles, owing to a relatively strong domestic market by European standards. However, while consumers’ expenditure was high, it was not deep—car ownership per capita in 1938 being around a third of US levels. This chapter examines why the British automobile sector failed to take off into mass market diffusion. A number of important factors are highlighted, including lower British wages relative to the
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Book chapters on the topic "Transport network density"

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Dmytriiev, Illia, Inna Shevchenko, Nazgul Smagulova, Oleksandr Yefymenko, and Ayaulym Rakhmatulina. "Quality management of passenger transport by road transport in time deficit conditions." In STRATEGIC-ORIENTED MANAGEMENT OF THE TRANSPORT INDUSTRY: LOGISTICS APPROACHES, INNOVATIVE SOLUTIONS AND MANAGEMENT MODELS. TECHNOLOGY CENTER PC, 2025. https://doi.org/10.15587/978-617-8360-14-6.ch7.

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This section examines the theoretical and methodological aspects of assessing the quality of passenger transportation by road under time constraints. The standards for customer time expenditure on passenger transportation by road under time constraints in urban conditions are substantiated by quality levels (high; medium; low) and groups of cities (Group I – cities with a population of over 1 million people; Group II – cities with a population of 500 thousand to 1 million people; Group III – cities with a population of 250 thousand to 500 thousand people; Group IV – cities with a population of
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Causo, Maria Serena, Erika Cerasti, Fabrizio De Fausti, and Monica Scannapieco. "Exploring Globalization with Cosmopolitics." In Proceedings e report. Firenze University Press and Genova University Press, 2023. http://dx.doi.org/10.36253/979-12-215-0106-3.30.

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Cosmopolitics, an open-source dashboard designed by an Istat team to perform exploratory data analysis using Eurostat statistical open data on international trade, offers several tools for investigating globalization phenomena such as the dynamics of global value chains (GVC). The advantage of this widely spread economic organization is well known: companies obtain economic advantages by direct foreign investments or by production outsourcing, i.e. relocating some production phases to countries where high specialization or an advantageous labor market create greater opportunities. However, by
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Olczak, Bartłomiej, and Małgorzata Hanzl. "Adaptation to Climate Change—A Challenge for Small Towns." In The Urban Book Series. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-77752-3_25.

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Abstract A compact city is one of the leading solutions to counteract the negative impact of climate change. It is also considered a node in the Transit-Oriented Development network. However, while a higher urban density can, on the one hand, positively influence public infrastructure, transport and economics, on the other hand, as we learn from the analysis of Berghauser Pont et al., it can have negative environmental, social and health impacts. Therefore, the main objective of this research is to look for the trade-offs, including density and provision of open green areas that will serve cli
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Sahu, Kabita Kumari. "Trend, Growth, and Problems of Road Transport in India." In Advances in Finance, Accounting, and Economics. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-2361-1.ch010.

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The objectives of the present chapter are to analyze the trend, growth, problems of road transport and inter-state variation in road network in the country with the help of secondary data. India has one of the largest road networks in the world, of 33.14 lakh km, consisting of (1) national highways (NHs), (2) State highways (SHs), (3) major district roads (MDRs), and (4) rural roads (RRs) that include other district roads and village roads. The growth rate of road was 12.50 per cent in 2014 due to significant increase in urban roads. The road density per 100 Sq KM of land area is 142.68 in Ind
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"Measuring Public Transport Accessibility in Metropolitan Area." In Big Data Analytics in Traffic and Transportation Engineering. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7943-4.ch001.

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Improving access to public transport can be considered an effective way of reducing the negative side-effects of motorised commuting. This chapter used the large dataset of Victorian Integrated Survey of Travel and Activity (VISTA) to introduce a new approach measuring public transport accessibility within the Melbourne region, Australia. A public transport accessibility index (PTAI) is a combined measure of public transport service frequency and population density as an important distributional indicator. Although many studies have measured access levels to public transport stops/stations, th
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Caves, Douglas W., Laurits R. Christensen, Michael W. Tretheway, and Robert J. Windle. "Network effects and the measurement of returns to scale and density for U.S. railroads." In Analytical Studies in Transport Economics. Cambridge University Press, 1986. http://dx.doi.org/10.1017/cbo9780511895913.005.

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Barkouk, Hamid, and El Mokhtar En-Naimi. "Intelligent Transport Systems Services in VANETs and Case Study in Urban Environment." In Innovative Applications of Big Data in the Railway Industry. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-3176-0.ch008.

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The VANET (Vehicular Ad hoc Network) is a collection of mobile nodes forming a temporary network on variable topology, operating without base station and without centralized administration. Communication is possible between vehicles within each other's radio range as well as with fixed components on road side infrastructure. The characteristics of VANET network that distinguishes it from other ad hoc networks, such as high mobility and communication with the infrastructure to support security or comfort applications, have prompted researchers to develop models and mobility specific protocols.
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Anitha, N., A. Manshath, Shaik Moinuddin Imran, B. Ranjitha, Manish Kumar Thakur, and Mohit Tiwari. "Machine Learning for Optimal Matching Management Techniques With Vehicular Network Communication Models." In Networking, Transport, and Quality of Service in Vehicular Networks. IGI Global, 2025. https://doi.org/10.4018/979-8-3693-6422-2.ch004.

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The varied types of Vehicular Networks Communication models (VNCM) circumscribe the decision-makers into a chaotic decision-making environment. The choice-making of VNCM is purely dependent on the attributes of traffic volume, vehicle density, road type, weather conditions, and application demands. However, the attribute of management techniques with the attribute values of dynamic routing, load balancing, and congestion control is more significant in choosing the desirable communication model. This challenging decision-making problem shall be resolved by applying the machine learning approach
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Bhatt Maya P. "Water Quality and Flux of Bagmati River within Kathmandu Valley, Nepal." In Surface and Sub-surface Water in Asia. IOS Press, 2015. https://doi.org/10.3233/978-1-61499-540-1-243.

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Water quality degradation is a serious environmental problem in Nepal especially in urbanized basins. Water sampling was carried out along the heavily urbanized Bagmati drainage network within Kathmandu valley during 2010&amp;ndash;2011 in order to evaluate the controlling factors of chemical parameters and to estimate the transport of chemicals from different positions of the landscape. The direct inputs of municipal solid wastes associated with high population density appeared as a prime controlling factor for the variation in chemical parameters and their fluxes. Most of the chemical parame
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Maharajpet, Sheela S., Manish Kumar Thakur, and S. Chiranjeevi. "Driving Towards Safer Cities." In Networking, Transport, and Quality of Service in Vehicular Networks. IGI Global, 2025. https://doi.org/10.4018/979-8-3693-6422-2.ch003.

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The most promising system-proposed solution is to benefit real-time traffic density; congestion can be minimized through dynamic fine-tuning of signal timings. Making use of PIR sensors and LED countdown timers, the system effectively enhances traffic flow and driver awareness. However, future upgrades for greater performance optimization might consider broadening the data collection scale through an enlarged sensor network, advanced traffic modeling techniques, and integration with other urban infrastructural systems. Additional work on the machine learning algorithms probably allowed the sys
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Conference papers on the topic "Transport network density"

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Kulathunga, M., and H. R. Pasindu. "Cost-effective prioritization of road networks for post-flood recovery: a network robustness framework." In Transport Research Forum 2025. Transportation Engineering Group, Department of Civil Engineering, University of Moratuwa, 2025. https://doi.org/10.31705/trf.2025.15.

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An increase in the occurrence and intensity of flooding events is posing significant damage to worldwide road infrastructure. Their consequences include reduced movement, loss of accessibility, and lower economic activity, which disrupt both community and regional transportation systems. For a swift post-flood recovery, it is important to decide the best repair actions for damaged roads and to keep the network strong, within the budget levels. The study introduces a new framework that helps choose the best repair options for flood-damaged roads by prioritizing the robustness of the network. It
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Gupta, Man Prakash, David Estrada, Eric Pop, and Satish Kumar. "Impact of Contact Resistances on Electrical and Thermal Transport in Carbon Nanotube Network Transistors." In ASME 2012 Third International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/mnhmt2012-75111.

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The breakdown mechanism of carbon nanotube (CNT) networks is explored using a coupled electro-thermal model, which simulates both electrical and thermal transport in CNT network thin film transistors (CN-TFTs). The numerical results are validated against experimental observations on CN-TFTs with similar device geometry, network statistics, and thermal environment. We find the numerical predictions are in good agreement with experimental measurements of power and temperature of CN-TFT devices. Comparing the simulation results with experiments, we observe that the CNT-substrate thermal conductan
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Deivendra, H., and S. Balasooriya. "Modelling the accessibility to on-demand taxi services in Colombo, Sri Lanka." In Transport Research Forum 2025. Transportation Engineering Group, Department of Civil Engineering, University of Moratuwa, 2025. https://doi.org/10.31705/trf.2025.5.

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On-demand taxi services have rapidly become a key component of urban mobility systems worldwide, particularly in developing cities where traditional public transport often struggles to meet the demand for flexible and reliable travel options. In Sri Lanka, the introduction of app-based taxi services such as PickMe and Uber in 2015 has significantly altered urban travel behavior, especially in dense zones like the Colombo District. While these platforms offer convenience through real-time ride matching and app based booking, there is limited understanding of how accessible these services truly
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Bahri, Ashtiwi, and Jennifer Miskimins. "The Effects of Fluid Viscosity and Density on Proppant Transport in Complex Slot Systems." In SPE Hydraulic Fracturing Technology Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/204175-ms.

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Abstract The main functions of hydraulic fracturing fluids are to create a fracture network and to carry and place the proppant into the created fractures networks, thus, adding to fracture conductivity. Significant research has been performed to develop ideal fracturing fluid systems. The development focus has mainly been on optimization of a fluid rheology that can transport and place the proppant into the primary and any subsidiary fractures with less damage to the formation and at a lower cost. The main goal of this work is to add to the understanding and optimization of proppant transport
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RANCEVA, Justina, and Rasa UŠPALYTĖ-VITKŪNIENĖ. "Principles of creating a public transport network model for regions." In 12th International Conference “Environmental Engineering”. VILNIUS TECH, 2023. http://dx.doi.org/10.3846/enviro.2023.912.

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This article analyzes one of the steps of the transportation system model - network modeling. The network model consists of: zoning of the considered region, selection of network connections and routes of public transport lines, choosing the demand time series of the model. The model created for the region has its own specificities, such as uneven population density, big differentiation of public transport demand in terms of place and time. Therefore, the development of a public transport model for a region is very different from a public transport model for a city. The purpose of this article
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Hu, Lin, Haibin Chen, Gabriella Coloyan, and Alan J. H. McGaughey. "Phonon Transport in Carbon Nanotube Aerogels." In ASME 2012 Third International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/mnhmt2012-75048.

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A carbon nanotube (CNT) aerogel is a low-density network of small diameter single-walled CNTs held together by van del Waals forces. Due to the excellent mechanical, thermal, and electrical properties of individual CNTs and the potential to fuse the junctions in the aerogel, CNT aerogels are candidates for ultralight structural media, radiation detectors, thermal insulators, and electrical conductors. Using molecular dynamics (MD) simulation, we predict the thermal conductance of the junction formed between two CNTs. To access the range of conditions present in the aerogel, we test the effects
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Bainier, Francis, and Rainer Kurz. "Impacts of H2 Blending on Capacity and Efficiency on a Gas Transport Network." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-90348.

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Abstract Gas Transport System Operators (TSO1) are considering injecting hydrogen gas in their networks. Blending hydrogen into the existing natural gas pipeline network appears to be a strategy for storing and delivering renewable energy to markets [1], [2],[3]. In comparison to methane, hydrogen gas (dihydrogen or molecular hydrogen) has a higher mass calorific value than methane gas. Because of this property, molecular hydrogen is appreciated for space shuttle engines. A second property is that hydrogen gas has a lower mass density than methane gas. The result of the second property is that
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Xia, Chunguang, and Nicholas Fang. "Enhanced Mass Transport Through Permeable Polymer Microcirculatory Networks." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-15408.

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One of the obstacles of culturing functioning vital tissues in vitro is to obtain a substantial biomass at a physiological cell density (&amp;gt;108cells/cm3). At this high density, the diffusion length of metabolites is limited to ~100um. As a matter of fact, in real tissue, almost all the cells are located within 100um distance from the capillaries [1]. Studies [2, 3] also confirmed that the cells in the artificial tissue cannot be properly cultured when they are further than 400um from the external nutrient source. Therefore, to culture three dimensional artificial tissue with substantial b
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Liu, Jun, Mohamed Alhashme, and Ronggui Yang. "Thermal Transport Across Carbon Nanotube Connected by Molecular Linkers." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-64931.

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Carbon nanotubes (CNTs) have been reported to have excellent thermal and mechanical properties over the past two decades. However, the practical application of CNT-based technologies has been limited, due to the inability to transform the excellent properties of single CNTs into macroscopic applications. CNT network structure connects CNTs and can be possibly scaled up to macro-scale CNT-based application. In this paper, nonequilibrium molecular dynamics is applied to investigate thermal transport across two CNTs connected longitudinally by molecular linkers. We show the effect of different ty
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Hendrix, W. Mark. "Thermal Design of a DWDM Optical Network System." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-81704.

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DWDM optical transport systems are an important link in communications networks. These systems are the backbone of telecommunications infrastructures and carry large volumes of telecom traffic. As a result, their reliability is critical. Thermal performance is key to meeting this reliability requirement and is therefore a major component of DWDM system development. The resulting thermal design process must balance opposing requirements such as high product density, thermal sensitivity of optical components, cooling fan noise limits, and high ambient temperature and altitude requirements. This
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Reports on the topic "Transport network density"

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Basso Sotz, Leonardo Javier, and Hugo E. Silva Montalva. The Efficiency of Urban Transport Policies in Latin-American Cities. Inter-American Development Bank, 2023. http://dx.doi.org/10.18235/0005195.

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Urban sustainability requires reducing the environmental footprint of urban mobility. To achieve this goal public transport becomes key due to its lower impact on congestion, pollution, accidents and greenhouse gas emissions as compared to private transport. Thus, encouraging public transport use is a frequent goal among city authorities. For this, they often devote an important fraction of their budget to improve the quality of its service. Many cities subsidize not just the infrastructure for public transport, but also its operation based on (some of) the following reasons. 1. As a second-be
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Russo, David, Daniel M. Tartakovsky, and Shlomo P. Neuman. Development of Predictive Tools for Contaminant Transport through Variably-Saturated Heterogeneous Composite Porous Formations. United States Department of Agriculture, 2012. http://dx.doi.org/10.32747/2012.7592658.bard.

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The vadose (unsaturated) zone forms a major hydrologic link between the ground surface and underlying aquifers. To understand properly its role in protecting groundwater from near surface sources of contamination, one must be able to analyze quantitatively water flow and contaminant transport in variably saturated subsurface environments that are highly heterogeneous, often consisting of multiple geologic units and/or high and/or low permeability inclusions. The specific objectives of this research were: (i) to develop efficient and accurate tools for probabilistic delineation of dominant geol
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Löfving, Linnea, Hilma Salonen, and Sæunn Gísladóttir. Electric Aviation Outlook in the Nordics. Nordregio, 2023. http://dx.doi.org/10.6027/wp2023:4.1403-2511.

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Regarding geographical accessibility questions, the five Nordic countries stand out in Europe due to their low population density, geographic variety including fjords, lakes, and mountains but also the prominence of sustainable energy sources. Before this backdrop, electric aviation holds the potential to make the region’s transport sector more sustainable while helping to overcome regional development and accessibility challenges, particularly in rural areas. The introduction of electric airplanes in local transport networks promises the reduction inter alia greenhouse gas emissions and air p
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