Temat: agent-based model - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: An agent-based model of consumer choice. An evaluation of the strategy of pricing and advertising
Autorzy:: Kot, Michał
Tematy:: consumer choice
agent-based model
learning consumer; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/2175832.pdf Link otwiera się w nowym oknie
Opis:: The authors develop an agent-based model of the market where firms and consumers exchange products. Consumers in the model are heterogeneous in terms of features, such as risk-aversion or owned assets, which impact their individual decisions. Consumers constantly learn about products’ features through personal experience, word-of-mouth, or advertising, update their expectations and share their opinions with others. From the supply-side of the model, firms can influence consumers with two marketing tools: advertising and pricing policy. Series of experiments have been conducted with the model to investigate the relationship between advertising and pricing and to understand the underlying mechanism. Marketing strategies have been evaluated in terms of generated profit and recommendations have been formulated.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: A Deep Dive into the Delta Wave: Forecasting SARS-CoV-2 Epidemic Dynamic in Poland with the pDyn Agent-Based Model
Autorzy:: Bartczuk, Rafał P.
Krupa, Bartosz
Nowosielski, Jędrzej M.
Górski, Łukasz
Gruziel-Słomka, Magdalena
Radwan, Maciej
Semeniuk, Marcin
Rakowski, Franciszek
Moszyński, Antoni
Niedzielewski, Karol
Kaczorek, Artur
Dreger, Filip
Zieliński, Jakub
Bogucki, Dominik
Kisielewski, Jan
Dudziuk, Grzegorz
Haman, Jędrzej
Bielczyk, Natalia
Tymoszuk, Urszula
Wydawca:: Research Square Company
Cytata wydawnicza:: Karol Niedzielewski, Rafał P. Bartczuk, Natalia Bielczyk, Dominik Bogucki, Filip Dreger, Grzegorz Dudziuk, Łukasz Górski, Magdalena Gruziel-Słomka, Jędrzej Haman, Artur Kaczorek, Jan Kisielewski, Bartosz Krupa, Antoni Moszyński, Jędrzej M. Nowosielski, Maciej Radwan, Marcin Semeniuk, Urszula Tymoszuk, Jakub Zieliński, Franciszek Rakowski, A Deep Dive into the Delta Wave: Forecasting SARS-CoV-2 Epidemic Dynamic in Poland with the pDyn Agent-Based Model, May 23, 2023, Niedzielewski K, Bartczuk RP, Bielczyk N, et al. A Deep Dive into the Delta Wave: Forecasting SARS-CoV-2 Epidemic Dynamic in Poland with the pDyn Agent-Based Model. Research Square; 2023. DOI: 10.21203/rs.3.rs-2966996/v1.
Opis:: The present study was a part of the "ICM Epidemiological Model Development" project, funded by the Ministry of Science and Higher Education of Poland with grants 51/WFSN/2020, 28/WFSN/2021, and 37/WFSN/2022 awarded to the University of Warsaw.
In this work, we describe and forecast the fourth wave of the SARS-CoV-2 epidemic, driven by the Delta variant, using pDyn — a detailed epidemiological agent-based model. It is designed to explain the spatiotemporal dynamics of the SARS-CoV-2 spread across Polish society, predicting the number and locations of disease-related states for agents living in the virtual society in response to varying properties of the pathogen and the social structure and behavior. We evaluate the validity of the dynamics generated by the model, including the succession of pathogen variants, immunization dynamics, and the ratio of vaccinated individuals among confirmed cases. Additionally, we assess the model’s predictive power in estimating pandemic dynamics (peak iming, peak value, and wave length) of disease-related states (number of confirmed cases, hospitalizations, ICU hospitalizations, and deaths) both at the national level and in the highest administrative units in Poland (voivodships). When testing the model’s validity, we compared real-world data (excluding data used for calibration) to our model estimates to evaluate whether pDyn accurately reproduced the epidemic dynamics up to the simulation time (October 28, 2021). To assess the accuracy of pDyn’s predictions, we retrospectively compared simulation results with real-world data acquired after the simulation date, evaluating pDyn as a tool for predicting future epidemic spread. Our results indicate that pDyn accurately predicts and can help us better understand the mechanisms underlying the SARS-CoV-2 dynamics.
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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Skocz do pozycji: 3.

Tytuł:: Comparing spatial-interaction and hybrid agent-based modelling approaches : an application to location analysis of services
Autorzy:: Kowalski, Łukasz
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 4.

Tytuł:: Modelling foraging strategies of honey bees as agents in a dynamic landscape representation
Autorzy:: Ziółkowska, Elżbieta
Capela, Nuno
Topping, Christopher John
Duan, Xiaodong
Opis:: Introduction: Both intrinsic colony mechanisms and external environmental variables affect the honey bee colony development rates and response and a key aspect of this is the use of resources within the landscape by honey bees. Although several models have been developed to explore the foraging behaviour of bees, none fully considered the spatial and temporal dynamics of landscape resources and the role of the colony in the process. Methodology: Here, we introduce a new honey bee foraging model being developed as a part of the ApisRAM honey bee colony model. Based on agent-based modelling, we used a dynamic ALMaSS landscape model enhanced with floral resource modelling to assess the impacts of weather conditions and resource availability on the possible foraging behaviour of honey bees. Several possible mechanisms (defined, based on honey bee traits) for scouting and foraging were investigated, separately for nectar and pollen collection, including prioritising foraging polygons for nectar foraging according to their distance to the colony, the quality or the energetic efficiency and, for pollen foraging, according to their distance to the colony and pollen quantity. Results: If model foraging bees prioritised the polygons, based on their distance from the colony, the number of unsuccessful flights increased compared to other tested strategies and the total amount of sugar collected showed a high variability. Contrary to expectations, the energetic efficiency strategy did not provide the colony with the highest amount of sugar. Overall, the tested strategies provide different outcomes on the collection of resources, the number of performed flights and their success rate, evidencing that the model's outcome at the colony level arises from the individual types of behaviour. Conclusions and Relevance: Variability in the mass of collected nectar and pollen was found mostly when scout bees applied the distance strategy. This higher variability in sugar collection means that model bees were not able to find the most profitable foraging sites at the landscape level, but only at the local level. Other strategies showed less dependence on the surrounding landscape (i.e. quality or random), but it comes at a cost (i.e. lower production for both nectar and pollen collection). These outputs help us evaluate which strategies could be used for future model development and confirm the models' ability to create dynamic responses. These responses at the colony level were only possible thanks to the implementation of a dynamic landscape model and dynamic spatiotemporal resource model, as well as implementing a social communication mechanism for bees to share information about the resources. Plant nectar production and quality information is essential to predict honey bee foraging distribution. In future model development, the implementation of pollen quality should also be explored to evaluate if it influences the overall pollen collection.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 5.

Tytuł:: The Formal model for Coccinella septempunctata for implementation in Animal Landscape and Man Simulation System
Autorzy:: Chuhutin, Andrey
Topping, Christopher John
Duan, Xiaodong
Ziółkowska, Elżbieta
Opis:: We present the Formal Model for the seven-spotted ladybird Coccinella septempunctata L., to be implemented in the Animal Landscape and Man Simulation System. This agent-based model is designed to dynamically interact with pre-existing aphid species models, providing a foundation for studying the effects of landscape-scale management on these species. It also serves as a crucial component in developing a model system to support the analysis of Integrated Pest Management strategies. We present an extensive literature survey of C. septempunctata ecology and behaviour. The model primarily considers temperature and aphid prey availability as the major driving factors, given the species’ reliance on aphids during its juvenile stage. Mechanisms and parameters are, as far as possible, derived from previous models and literature studies. Each major section of behaviour is described first in terms of what is known ecologically and secondly in terms of planned implementation. We present a description of the factors included in the model and those consciously excluded, providing justifications for these decisions. Additionally, we discuss aspects of the model’s implementation and identify data gaps, highlighting specific areas for future improvement. The next phase involves the implementation and calibration of the model.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 6.

Tytuł:: Macroprudential Banking Regulation: Does One Size Fit All?
Autorzy:: Neuberger, Doris
Rissi, Roger
Tematy:: financial stability
systemic risk
financial system
banking regulation
agent-based model; Pokaż więcej
Wydawca:: Uniwersytet Warszawski. Wydawnictwo Naukowe Wydziału Zarządzania
Powiązania:: https://bibliotekanauki.pl/articles/565707.pdf Link otwiera się w nowym oknie
Opis:: The macroprudential regulatory framework of Basel III imposes the same minimum capital and liquidity requirements on all banks around the world to ensure global competitiveness of banks. Using an agent-based model of the financial system, we find that this is not a robust framework to achieve (inter)national financial stability, because efficient regulation has to embrace the economic structure and behaviour of financial market participants, which differ from country to country. Market-based financial systems do not profit from capital and liquidity regulations, but from a ban on proprietary trading (Volcker rule). In homogeneous or bank-based financial systems, the most effective regulatory policy to ensure financial stability depends on the stability measure used. Irrespective of financial system architecture, direct restrictions of banks’ investment portfolios are more effective than indirect restrictions through capital, leverage and liquidity regulations. Applying the model to the Swiss financial system, we find that increasing regulatory complexity excessively has destabilizing effects.These results highlight for the first time a necessary change in the regulatory paradigm to ensure the effectiveness and efficiency of financial regulations with regards to fostering the resilience of the financial system.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Forecasting SARS-CoV-2 epidemic dynamic in Poland with the pDyn agent-based model
Autorzy:: Bartczuk, Rafał P.
Krupa, Bartosz
Nowosielski, Jędrzej M.
Górski, Łukasz
Gruziel-Słomka, Magdalena
Radwan, Maciej
Semeniuk, Marcin
Rakowski, Franciszek
Moszyński, Antoni
Haman, Jerzy
Niedzielewski, Karol
Kaczorek, Artur
Dreger, Filip
Zieliński, Jakub
Bogucki, Dominik
Kisielewski, Jan
Dudziuk, Grzegorz
Bielczyk, Natalia
Tymoszuk, Urszula
Wydawca:: Elsevier B.V.
Cytata wydawnicza:: Epidemics 49 (2024) 100801. https://doi.org/10.1016/j.epidem.2024.100801
Opis:: We employ pDyn (derived from “pandemics dynamics”), an agent-based epidemiological model, to forecast the fourth wave of the SARS-CoV-2 epidemic, primarily driven by the Delta variant, in Polish society. The model captures spatiotemporal dynamics of the epidemic spread, predicting disease-related states based on pathogen properties and behavioral factors. We assess pDyn’s validity, encompassing pathogen variant succession, immunization level, and the proportion of vaccinated among confirmed cases. We evaluate its predictive capacity for pandemic dynamics, including wave peak timing, magnitude, and duration for confirmed cases, hospitalizations, ICU admissions, and deaths, nationally and regionally in Poland. Validation involves comparing pDyn’s estimates with real-world data (excluding data used for calibration) to evaluate whether pDyn accurately reproduced the epidemic dynamics up to the simulation time. To assess the accuracy of pDyn’s predictions, we compared simulation results with real-world data acquired after the simulation date. The findings affirm pDyn’s accuracy in forecasting and enhancing our understanding of epidemic mechanisms
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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Skocz do pozycji: 8.

Tytuł:: Koszt zmiany organizacyjnej a konkurencja w środowisku złożonym - podejście agentowe
Research on cost of organizational change and competition in complex environment - an agent-based approach
Autorzy:: Owczarek, T.
Tematy:: zarządzanie zmianami
koszty
konkurencyjność
model agentowy
changes management
costs
competitiveness
agent-based model; Pokaż więcej
Wydawca:: Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Powiązania:: https://bibliotekanauki.pl/articles/321860.pdf Link otwiera się w nowym oknie
Opis:: Artykuł prezentuje wieloagentowy model symulacyjny, który posłużył do zbadania wpływu, jaki na poziom konkurencyjności w środowisku o określonej złożoności wywiera wielkość kosztu organizacyjnej zmiany. Model ten stanowi rozwinięcie modelu zaprezentowanego w [16], a opartego na propozycji S. Kauffmana.
The article presents agent-based approach to research on cost of organizational change and its impact on competition level in complex environment. The multi-agent simulation model used here is based on the model proposed in [16] which utilizes Kauffman’s NK model of fitness landscape.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Agent-based evacuation in passenger ships using a goal-driven decision-making model
Autorzy:: Ni, B.
Li, Z.
Li, X.
Tematy:: ship evacuation analysis
agent-based model
goal-driven decision-making model
social force model
steering behavior; Pokaż więcej
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Powiązania:: https://bibliotekanauki.pl/articles/258666.pdf Link otwiera się w nowym oknie
Opis:: A new agent-based model is proposed to support designers in assessing the evacuation capabilities of passenger ships and in improving ship safety. It comprises models for goal-driven decision-making, path planning, and movement. The goal-driven decision-making model determines an agent’s target by decomposing abstract goals into subgoals. The path-planning model plans the shortest path from the agent’s current position to its target. The movement model is a combination of social-force and steering models to control the agent in moving along its path. The utility of the proposed model is verified using 11 tests for passenger ships proposed by the Maritime Safety Committee of the International Maritime Organization.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Simulation of Human Behavior as an Auxiliary Design Tool
Autorzy:: Cyprianova, Lucia
Kurilla, Lukáš
Tematy:: simulation of human behaviour
agent-based model
pedestrian model
occupant model
decision-making process
digital simulation methods; Pokaż więcej
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Powiązania:: https://bibliotekanauki.pl/chapters/59945795.pdf Link otwiera się w nowym oknie
Opis:: This review paper summarises the current state of digital simulation methods used to analyse human behaviour in physical environments. It aims to identify why digital simulations of human behaviour are not yet commonly used by architects and urban planners and to provide a systematic review of available methods, software tools, their capabilities and limitations. It covers physical models, Space Syntax, virtual reality and dynamic simulation methods for pedestrian and occupant models. There are a number of most common decision-making processes for pedestrian and occupant models. Rule-based process involves predetermined rules or heuristics. Markov Chain uses probabilities and the current state to determine state transition. Goal Oriented Action Planning chains predefined activities to achieve a specified goal. In Narrative-based modelling a narrative governs agent behaviour. In Game-theoretic approach interactions are modelled as a game. Reinforcement Learning involves learning through rewards or punishments and Artificial Neural Networks learn from data and make predictions based on that learning. Although Artificial Neural Networks come with many benefits, such as high flexibility and the ability to handle uncertain and incomplete data, it is a relatively new field of research and it requires significant computational resources. Each process has its own strengths and limitations. Multiple algorithms or decision-making processes can be combined to achieve the desired simulation properties. There are multiple digital simulation software tools for pedestrian and occupant simulations. Some of them, such as SUMO, Aimsun, and MATSim, are optimised for transportation simulations but are not suitable to become auxiliary tools in the architectural design process. PathFinder is a software for simulating evacuation scenarios. Anylogic is a flexible user-friendly tool suitable for a wider range of applications. Tools like IES and CitySim are used for building performance optimisation. A game engine Unity is a suitable option for creating interactive and visually appealing models, however it requires programming knowledge. A simulation in a 3D environment is more complex and requires more computational resources, but it can bring more realistic results compared to simulations in 2D. The paper concludes with discussion about the reasons why digital simulation has yet not become a common tool in architectural practice.
Dostawca treści:: Biblioteka Nauki

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