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Parameter Estimation of Three Cell Interaction Using Lotka Volterra Differential Equations 2

Parameter Estimation of Three Cell Interaction Using Lotka V...

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2nd international conference on Computing, Networking, Telecommunications and Engineering Sciences Applications, CoNTESA 2021

作者： Meca, Alba Uka, Arban Ali, Maaruf Epoka University Dept. of Computer Engineering Tirana Albania

ISBN: (纸本)9781665436106

In mathematical biology, established differential system equations are used to model the growth of coexisting different species in a resource competing environment. As the biological system is nonlinear, techniques currently do not exist to offer explicit solutions. The dynamical parameters involved in modelling of predator-prey systems may appear straightforward, but a careful investigation of these model systems frequently leads to extremely complex and difficult challenges. The most crucial aspect of population modelling is that the mathematical model in question can demonstrate the observed characteristics. Ecological system dynamical modelling is typically a research field of continuous *** investigation is dedicated to parameter estimation of a generalised Lotka-Volterra system of three non-linear differential equations, given an experimental dataset of the interaction between epithelial cells, candida, and streptococci bacterium, utilising several MATLAB® optimisation functions by 'fitting' the simulation model to the empirical data. Despite their simplicity, the Lotka-Volterra equations are still the most common models for describing species *** data gathered and examined using experimental laboratory datasets revealed that each dataset has its own distinct characteristics. In each dataset, none of the approaches produced the best-expected result. Even when it appeared that fitting was achievable, one of the parameters would be problematic, leaving the optimisation problem unresolved in a complete and valid ***, the analysis revealed that the generalised Lotka Volterra (gLV) ordinary differential equation utilised in this setting is insufficient to generate realistic parameter estimations. This conclusion is also supported by a number of scientific investigations that indicate how certain modifications and adaptations to the gLV mathematical model can lead to more accurate results and a more thorough examination. In systems bio

关键词： Ordinary differential equations

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Numerical Thermomechanical Viscous 2D Material Rheology modelling Enhanced by Marker-in-Cell (MIC) Technique 2

Numerical Thermomechanical Viscous 2D Material Rheology Mode...

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2nd international conference on Sciences and Technology Applications, ICOSTA 2020

作者： Irwandi, I. Umar, Muksin Khaizal Sudarmaji Syiah Kuala University Banda Aceh23233 Indonesia Geophysics Laboratory Gadjah Mada University Yogyakarta55281 Indonesia

The rheology of a material especially related to mechanical behaviour is an important characteristic. Rheology has wide applications for example in nanomaterials, engineering design, biology, and in a large scale case in geodynamics study. Rheology relies on several physical equations such as continuity equation, momentum equation, gravity potential, state equation, heat transfer, and advection equation. The equations seem to be simple, however, the application of those equations to a real case is not easy and causes many numerical problems. Marker-in-Cell (MIC) is a technique to solve a numerical rheology modelling problem especially diffusion of sharp gradients during the advection process. The technique successfully simulates the advection process for thermomechanical viscous material for a 2-dimensional case study. The model was initially set up two parts with laterally contrast difference of material characteristics. The lateral density difference of material induced gravitational force and generated circular movement of material. After the simulation was run for the 20-time step, the whole material moved more clockwise circulation. The model started to be stable when all denser material at the lower layer and lower density material at the upper part. The model was fully stable and become at a stationary state at a time more than 100-time steps. The final simulation result showed that the MIC algorithm successfully simulated the conversion process involving the thermomechanical mechanism with diffusion error control and without breaking the contrast density of the material. © Published under licence by IOP Publishing Ltd.

关键词： Equations of state

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simulation of combustion and alkali metal distribution in zhundong high alkali coal boiler based on computer control system 2

Simulation of combustion and alkali metal distribution in zh...

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2021 2nd international conference on Applied Physics and Computing, ICAPC 2021

作者： Gao, Guodong Shenhua Shendong Power Xinjiang Zhundong Wucaiwan Power Generation Co. Ltd Xinjiang Changji831700 China

Restricted by Xinjiang's special geographical location, economic conditions, transportation and other factors, Zhundong coal can't be sent out on a large scale, which seriously hinders the development of Zhundong coal base. Meanwhile, due to the coal-forming history and Xinjiang's special natural geographical environment, the alkali metal content in Zhundong coal is generally over 2%, which is much higher than that of power coal in other parts of China. In this paper, based on computer control system, the combustion and alkali metal distribution in Zhundong high alkali coal boiler are simulated, and the morphological distribution characteristics and migration laws of alkali metals such as Na and K in pulverized coal combustion process of high alkali coal, low alkali coal and their two coal samples are deeply studied. Combustion characteristics and heat flow distribution, the simulation results show that the flue gas temperature at the furnace outlet is 895.07°C, and the flue gas temperature near the wall is low, which is helpful to alleviate the slagging and contamination in the furnace. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： Coal

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An adaptive multi-sensor resource allocation algorithm based on efficiency function 2

An adaptive multi-sensor resource allocation algorithm based...

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2020 2nd international conference on Electronics and Communication, Network and computer Technology, ECNCT 2020

作者： Li, Jian Lu, Xuanmin Zhang, Yiwen Mou, Zhiying School of Electronics and Information Northwestern Polytechnical University Xi'an Shaanxi710129 China 615 Research Institute Shanghai200000 China

In this paper, combined with the Kalman filtering algorithm, the linear weighted sum of the normalized prediction information increment DI and the norm of target filter error covariance matrix ¦ cP ¦ is used to represent the pairing function of the target-sensor combination and the assignment and automatic updating of the pairing function between sensor and target are realized. Based on the analytic hierarchy process (AHP), an adaptive sensor resource allocation algorithm is proposed. The simulation results show that the algorithm can effectively integrate various evaluation factors and is compatible with different types of targets. The algorithm has simple structure and good versatility. The limited sensor resources can be dynamically adjusted according to the priority of targets, making the sensor allocation strategy more reasonable and effective. © 2020 Published under licence by IOP Publishing Ltd.

关键词： Analytic hierarchy process

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Research and Equilibrium Optimization of AODV Routing Protocol in Ad Hoc Network 2nd

Research and Equilibrium Optimization of AODV Routing Protoc...

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2nd EAI international conference on Artificial Intelligence for Communications and Networks, AICON 2020

作者： Liu, Zhongyue Shi, Shuo Gu, Xuemai School of Electronic and Information Engineering Harbin Institute of Technology Harbin Heilongjiang150001 China Network Communication Research Centre Peng Cheng Laboratory Shenzhen Guangdong518052 China International Innovation Institute of HIT in Huizhou Huizhou Guangdong516000 China

ISBN: (纸本)9783030690656

In the Ad Hoc network of AODV protocol, local node failure will occur when a node dies due to high cost or the network energy consumption is too large and the problem is serious. In this paper, based on the routing cost design, an optimized design scheme of AODV protocol (E-AODV) is proposed through the establishment and maintenance method. simulation results show that this method improves the performance of AODV network, reduces the death process of nodes and reduces the energy consumption. © 2021, ICST Institute for computer Sciences, Social Informatics and Telecommunications Engineering.

关键词： Energy utilization

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The Study of thermal process and Temperature Calibration for a Vacuum Drying Oven Based on Numerical simulation 2

The Study of Thermal process and Temperature Calibration for...

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2020 2nd international conference on Energy, Power, Environment and computer Application, ICEPECA 2020

作者： Liu, Ying Zhang, Wen Xu, Yang Zhang, Jing Chongqing Academy of Metrology and Quality Inspection Chongqing401123 China

Vacuum drying technique is widely used in food a processing, pharmaceutical and other industry which needs to be calculated regularly. In order to establish temperature calibration method for vacuum drying oven, temperature profile needs to be studied. In this paper, a three-dimensional (3D) unsteady mathematical model has been developed to study heat transfer in a vacuum drying oven. Governing equations are discretized in implicit form by using the control volume method. PRESTO! scheme was used for the discretization of the pressure modified equation. SIMPLE algorithm is adopted to solve the coupling of pressure and velocity. The natural-convection flow forced by buoyancy force was numerically calculated based on Boussinesq assumption. Results of the model calculation showed that temperature distribution in the vacuum drying oven significantly changed when the pressure in the oven is close to vacuum. Temperature uniformity in the vacuum drying box increases with the increase of vacuum degree. It is not appropriate to directly investigate the temperature uniformity of the vacuum drying oven by using JJF 1101-2019. The results can be used to lay a theoretical foundation for the establishment of calibration method for vacuum drying oven. © Published under licence by IOP Publishing Ltd.

关键词： Ovens

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modelling and simulation of deflection mechanism in rock drilling processing 2

Modelling and simulation of deflection mechanism in rock dri...

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2021 2nd international conference on Internet of Things, Artificial Intelligence and Mechanical Automation, IoTAIMA 2021

作者： Liu, Zhong Yang, Neng Xiong, Zhonggang Huo, Jiabo Wang, Hanying School of Mechanical Engineering Guilin University of Aerospace Technology Guangxi Guilin541004 China

With the development of social economy, hydraulic drilling machine has been widely used in the tunnel bridge, water conservancy projects and mining. In the process of construction, the drill rod of the hydraulic rock borer in drilling perforating process will produce deviation. It is often caused by the drilling efficiency and reduces the drilling hole scrap, seriously hindered the development of construction technology of drilling and blasting. Through the hydraulic drilling machine drill rod in the drilling cutting process of force analysis, drill rod in horizontal and vertical direction of the mechanical model are established. The relationship between the drill rod force and deflection of drilling in the drilling process is derived. At the same time, build ADAMS mechanical model, and the drilling process is simulated to find the relationship between the depth of drilling and the offset and offset angle. On this basis, the mechanical mechanism of borehole deviation of hydraulic rock drill is clarified, which provides a theoretical basis for the hydraulic rock drill hole deviations. © Published under licence by IOP Publishing Ltd.

关键词： Water management

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Attitudes to Vaccination: How the Opinion Dynamics Affects the Influenza Epidemic process 2nd

Attitudes to Vaccination: How the Opinion Dynamics Affects...

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2nd international conference on Modeling and simulation of Social-Behavioral Phenomena in Creative Societies, MSBC 2022

作者： Kumacheva, Suriya Zhitkova, Ekaterina Tomilina, Galina St. Petersburg State University 7/9 Universitetskaya nab. St. Petersburg199034 Russia EPAM Systems Spain S.L. Avd. Imperio Argentina 19–21 2 planta Malaga Andalucia29004 Spain

ISBN: (纸本)9783031337277

A hypothesis about the influence of the opinion dynamics on the subsequent epidemic process is considered. The existence of relation between the population’s attitude to vaccination and the dynamics of the influenza epidemic is assumed. Emphasis is placed on the spectrum of opinions of the population: from extremely negative to super-positive. Along with persons who are firmly confident in their point of view and propagandize it, there are doubting agents who make their choice to vaccinate or not under the influence of others’ opinions. Their decisions have an impact on the formation of their personal immunity and of the collective immunity of entire population. Opinion dynamics is assumed to be completed before the seasonal influenza rising incidence starts, and each individuum has decided to vaccinate or not until this moment. The purpose of this study is to identify the relationship between the parameters that characterize the opinions’ influence in the population and the number of people who have been infected (vaccinated and unvaccinated) at the beginning of influenza epidemic. simulation modeling of the dynamics of opinions is carried out using a network model for graphs of various configuration (grid, strongly connected graph, weakly connected graph). Modeling is carried out in a closed population using statistical data on morbidity and annual vaccination campaigns in Russia. The epidemic (SIR) process is represented by modification of the classical Kermack-McKendrick model (1927). A series of repeated simulations was carried out, a numerical experiment based on statistical data and scenario analysis were performed. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Dynamics

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Design of low-pressure sand casting process for water-cooled motor shell in electric vehicle 2

Design of low-pressure sand casting process for water-cooled...

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2021 2nd international conference on Mechanical Engineering and Materials, ICMEM 2021

作者： Jin, Yanzhu Song, Yulai Liu, Yaohui Cui, Wei Sun, Chi Key Laboratory of Automobile Materials of Ministry of Education School of Materials Science and Engineering Nanling Campus Jilin University Changchun130025 China FAW Foundry Co. Ltd. Changchun130013 China

Aluminium alloy motor shell is the core part of the new energy vehicle powertrain. It has a complex structure with an average wall thickness of 4~5mm, a side wall with 6~7mm spiral water jacket, and the bottom of the shell inlaid with cast steel bearing bushing. Because of its complex structure characteristics, as well as higher internal quality requirements and air tightness requirements, the casting process of motor housing is very difficult. This paper introduces the structural characteristics and common casting defects of the motor shell. On this basis, the typical casting process scheme of motor shell with sand core casting technology and the application of computer simulation technology in the development of motor shell casting process are discussed and shared. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： Shells (structures)

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Research on the Application of computer Virtual Reality Technology in Urban-Rural Integration of Rural Revitalization Strategy

Research on the Application of Computer Virtual Reality Tech...

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Networking, Communications and Information Technology (NetCIT), international conference on

作者： Wenjing Sun Weisong Wang Guangxi Science and Technology Normal University Laibin Guangxi China

Urban and rural planning under the rural revitalization plan is an important research topic at present. Based on computer virtual reality technology, this paper puts forward the system structure and technical route of establishing a simulation-based urban and rural planning information platform and auxiliary decision support system, and gives some key technical solutions. In this paper, after in-depth understanding of the data and application requirements required for urban and rural planning business, at the data level, for the 3D model data required for system application, the combination of airborne Lidar technology and oblique aerial photography technology is used to quickly realize urban and rural 3D real scenes modelling, greatly improving the production efficiency of 3D models. On the basis of integrating the existing planning thematic data, using the three-dimensional GIS software platform Skyline, a real three-dimensional scene including terrain and landscape is established. According to the functions required for urban and rural planning, the API program interface and COM components provided by the platform are used to expand the API interface of COM components and flexibly encapsulate related functions to develop a three-dimensional planning auxiliary decision support system.

关键词： Decision support systems Photography Solid modeling Three-dimensional displays Atmospheric modeling Virtual reality Production

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