Computational modelling of selected E-waste recycling process

E-wastes generation and management is still a major challenge for most developing countries. This paper discusses the development of a computational model for effective generation, accumulation and disposal of e-waste. This is with a view to providing information for managing the pattern of the e-waste growth and the recycling processes. Coloured Petri net (CPN) was used to model three selected e-waste recycling process. These models were simulated and analysed using the CPN Tools. The results of the simulation of the selected ewaste process models showed that the e-waste dynamics is a forward sequential and concurrent process. The model never can reach a state, which it is impossible to terminate with the correct result.Keywords: E-waste, Computational model, Recycling process, Simulation, State spaceVol. 26 No 1, June 2019

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Modeling and Analysis of Network Control System Based on Hierarchical Coloured Petri Net and Markov Chain

Discrete Dynamics in Nature and Society ◽

10.1155/2021/9948855 ◽

2021 ◽

Vol 2021 ◽

pp. 1-11

Author(s):

Jingdong Li ◽

Zhangang Wang ◽

Liankun Sun ◽

Wanru Wang

Keyword(s):

Markov Chain ◽

Petri Net ◽

Networked Control Systems ◽

Transition Probabilities ◽

Signal Transmission ◽

Network Control ◽

Drop Out ◽

Modeling And Analysis ◽

Cpn Tools ◽

Coloured Petri Net

This paper investigates a modified modeling of networked control systems (NCSs) with programmable logic controller (PLC). First, the controller-to-actuator and sensor-to-controller network-induced delays are investigated by a modeling tactics based on hierarchical coloured petri net (HCPN) in a structure-conserving way. Comparing with the recent result, the signal transmission delay is set in a random interval instead of a fixed mode; moreover, the data packet drop out and disorder are also taken into consideration. Second, delays captured form CPN tools are analyzed with a strategy based on Baum–Welch algorithm and statistics science. Besides, time delays are modeled as a Markov chain and the transition probabilities is calculated using the consequent from the previous operation. Finally, a comparison verification illustrates the equivalence property between proposed models.

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Petri Net Modelling of the Starch Enzymatic Liquefaction

Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca Agriculture ◽

10.15835/buasvmcn-agr:8777 ◽

2012 ◽

Vol 69 (2) ◽

Author(s):

Ion Dan MIRONESCU ◽

Monica MIRONESCU

Keyword(s):

Petri Net ◽

Industrial Production ◽

Model Parameters ◽

Enzymatic Reactions ◽

Simulation Environment ◽

Modelling Language ◽

Enzymatic Liquefaction ◽

Cpn Tools ◽

Coloured Petri Net ◽

Starch Liquefaction

This paper investigates the use of the Petri Net modelling language for the description and analysis of the enzymatic reactions that are used for the starch liquefaction. The Coloured Petri Net formalism supported by the CPN Tools modelling and simulation environment is used. The pools of substrates and products are represented as the places and the possible reactions as the transition of the net. The concurrent reactions are modelled trough transitions that are enabled at the same time. The occurrence probabilities associated with each of these concurrent transitions are chosen as the model parameters. The analysis of the specific properties of the model is used to fit the model to data from the industrial production process using the enzyme Liquozyme for the starch hydrolysis.

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Coloured Petri net model of the bCMS system using CPN tools

2013 3rd International Workshop on Comparing Requirements Modeling Approaches (CMA@RE) ◽

10.1109/cma-re.2013.6664178 ◽

2013 ◽

Cited By ~ 2

Author(s):

Isabel Sofia Brito ◽

Joao Paulo Barros

Keyword(s):

Petri Net ◽

Cpn Tools ◽

Coloured Petri Net

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Research on Command and Control Efficiency of Anti-Air Combat Using Ships and Warplanes Together Based on Layered Coloured Petri Net

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.687-691.2351 ◽

2014 ◽

Vol 687-691 ◽

pp. 2351-2358

Author(s):

Shi Liao Zhang ◽

Yi Tao Wang ◽

Jian Zhou Mao

Keyword(s):

Control System ◽

Response Time ◽

Petri Net ◽

Command And Control ◽

Throughput Rate ◽

Important Index ◽

Cpn Tools ◽

Coloured Petri Net ◽

And Control ◽

Command And Control System

AACSWT is one of the most important fighting styles, and C2E is an important index to deal with saturation attack. This paper models the AACSWT command and control system based on LCPN, and simulates to get all useful datum by the CPN Tools. By analyzing the indexes of response time and throughput rate which represent the C2E, this paper gives a lot of useful advices.

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Airport Surface Modelling and Simulation Based on Timed Coloured Petri Net

PROMET - Traffic&Transportation ◽

10.7307/ptt.v31i5.2947 ◽

2019 ◽

Vol 31 (5) ◽

pp. 479-490 ◽

Cited By ~ 2

Author(s):

Zhigang Su ◽

Mengqi Qiu

Keyword(s):

Petri Net ◽

Route Planning ◽

Modelling And Simulation ◽

Civil Aviation ◽

Guidance And Control ◽

System A ◽

Cpn Tools ◽

Coloured Petri Net ◽

Operation Unit ◽

And Control

In order to satisfy the requirements of International Civil Aviation Organization (ICAO) for aircraft taxi route planning in Advanced Surface Movement Guidance and Control System (A-SMGCS), an airport surface operation modelling and simulation approach based on timed and coloured Petri net is presented. According to the layout of the airport surface and the features of surface operation units, a static Petri net model of the airport surface is established. On this basis, in line with the requirements on the aircraft taxiing velocity in ICAO DOC 9830, the dynamic Petri net model of the airport surface operation is established by adding the time attribute to the static model. Additionally, the method of defining the capacity of airport operation unit place is proposed and the constraints of the airport surface operation are incorporated using Petri net elements. Unlike other papers in the field, the airport surface Petri net model established in this paper can simulate conflict-free taxiing using a Petri net simulator without relying on other model-independent algorithms. Based on the CPN Tools software, taking Toulouse Airport as an example, the validity of the model has been verified by comparing the model running data with real flight data.

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DNA-Guided Assembly for Fibril Proteins

Mathematics ◽

10.3390/math9040404 ◽

2021 ◽

Vol 9 (4) ◽

pp. 404

Author(s):

Alexandru Amărioarei ◽

Frankie Spencer ◽

Gefry Barad ◽

Ana-Maria Gheorghe ◽

Corina Iţcuş ◽

...

Keyword(s):

Computational Model ◽

Structural Properties ◽

Self Assembly ◽

Structural Characteristics ◽

Computational Modelling ◽

Shape Reconstruction ◽

Raw Material ◽

Dna Assembly ◽

Mesh Structure ◽

Elementary Fibril

Current advances in computational modelling and simulation have led to the inclusion of computer scientists as partners in the process of engineering of new nanomaterials and nanodevices. This trend is now, more than ever, visible in the field of deoxyribonucleic acid (DNA)-based nanotechnology, as DNA’s intrinsic principle of self-assembly has been proven to be highly algorithmic and programmable. As a raw material, DNA is a rather unremarkable fabric. However, as a way to achieve patterns, dynamic behavior, or nano-shape reconstruction, DNA has been proven to be one of the most functional nanomaterials. It would thus be of great potential to pair up DNA’s highly functional assembly characteristics with the mechanic properties of other well-known bio-nanomaterials, such as graphene, cellulos, or fibroin. In the current study, we perform projections regarding the structural properties of a fibril mesh (or filter) for which assembly would be guided by the controlled aggregation of DNA scaffold subunits. The formation of such a 2D fibril mesh structure is ensured by the mechanistic assembly properties borrowed from the DNA assembly apparatus. For generating inexpensive pre-experimental assessments regarding the efficiency of various assembly strategies, we introduced in this study a computational model for the simulation of fibril mesh assembly dynamical systems. Our approach was based on providing solutions towards two main circumstances. First, we created a functional computational model that is restrictive enough to be able to numerically simulate the controlled aggregation of up to 1000s of elementary fibril elements yet rich enough to provide actionable insides on the structural characteristics for the generated assembly. Second, we used the provided numerical model in order to generate projections regarding effective ways of manipulating one of the the key structural properties of such generated filters, namely the average size of the openings (gaps) within these meshes, also known as the filter’s aperture. This work is a continuation of Amarioarei et al., 2018, where a preliminary version of this research was discussed.

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