Filters








1,623 Hits in 5.4 sec

Soft computing applications in dynamic model identification of polymer extrusion process

Leong Ping Tan, Ahmad Lotfi, Eugene Lai, J.B. Hull
2004 Applied Soft Computing  
This paper proposes the application of soft computing to deal with the constraints in conventional modelling techniques of the dynamic extrusion process.  ...  Keywords: Dynamic modelling, soft computing, GA-fuzzy algorithm, steepest decent error backpropagation, semi-physical modelling, distributed parameter system, adaptive, polymer extrusion. f f J c J (11  ...  In the following sections, a brief description of the extrusion process will be given, to be followed by soft computing applications in developing a semi-physical model.  ... 
doi:10.1016/j.asoc.2003.10.004 fatcat:7mqy5bv6s5drhdbh4yhgpox4i4

Dynamic gray-box modeling for on-line monitoring of polymer extrusion viscosity

Xueqin Liu, Kang Li, Marion McAfee, Bao Kha Nguyen, Gerard M. McNally
2012 Polymer Engineering and Science  
SOFT SENSOR FOR EXTRUSION PROCESS Single Screw Extrusion Process Single screw extrusion is one of the core operations in polymer processing and therefore is the focus of this study.  ...  The ultimate goal of any control scheme in a polymer extrusion process is to control the final product quality.  ... 
doi:10.1002/pen.23080 fatcat:lgofcftd3zbp3alx5dsptadlbm

Design and Applications of Soft Sensors in Polymer Processing: A Review

Chamil Abeykoon
2019 IEEE Sensors Journal  
Then, a comprehensive review is made on the use of soft sensing techniques in polymer processing applications while identifying their capabilities and limitations.  ...  In polymer processing, the level of control of the process operational quality is vastly dependent upon the performance of the process monitoring techniques as it is quite difficult to observe the inside  ...  A number of different polymer processing techniques are used in the current industry based on the nature of the application, product, material, and so forth: Extrusion and Extrusion-based processes, Injection  ... 
doi:10.1109/jsen.2018.2885609 fatcat:wnxi6skpsbginglldffvjqlfiq

Polymer extrusion process monitoring using nonlinear dynamic model-based PCA

Xueqin Liu, Kang Li, Marion McAfee, Jing Deng
2012 Proceedings of 2012 UKACC International Conference on Control  
Polymer extrusion is one of the final forming stages in the production of many polymeric products in a variety of applications.  ...  Here the NFIR model is used to capture the nonlinearity and dynamics of the extrusion process.  ...  The description of the polymer extrusion line used in this application study was explained in Section IV.  ... 
doi:10.1109/control.2012.6334593 fatcat:jl5635g2fzeg7bvffphyr4grce

Single screw extrusion control: A comprehensive review and directions for improvements

Chamil Abeykoon
2016 Control Engineering Practice  
Polymer extrusion is usually a complex process, particularly due to the coupled nature of process parameters, and hence highly prone to fluctuations.  ...  In this work, a critical evaluation is made on the state-of-the-art of the previous control approaches in polymer extrusion in industry and research while identifying their limitations.  ...  Model-based extrusion control with fuzzy logic A possible novel approach of controlling the extrusion process with dynamic process models and fuzzy logic is discussed in this section.  ... 
doi:10.1016/j.conengprac.2016.03.008 fatcat:cnkqtwugazc5lo5rjvf3735yra

Machine Learning for Process Monitoring and Control of Hot-Melt Extrusion: Current State of the Art and Future Directions

Nimra Munir, Michael Nugent, Darren Whitaker, Marion McAfee
2021 Pharmaceutics  
This review gives a comprehensive overview of the application of machine learning algorithms for HME processes, with a focus on pharmaceutical HME applications.  ...  The main current challenges in the application of machine learning algorithms for pharmaceutical processes are discussed, with potential future directions for the industry.  ...  The first PLS model was based on in-line Raman spectra, and the second model, called a hybrid soft sensor model, was built using feeder process data, to predict the dynamic concentration of the API at  ... 
doi:10.3390/pharmaceutics13091432 pmid:34575508 fatcat:zte3z54uw5g63cnszkpvdfjhxy

A framework for teaching the fundamentals of additive manufacturing and enabling rapid innovation

Jamison Go, A. John Hart
2016 Additive Manufacturing  
The lectures begin with in-depth technical analysis of the major AM processes.  ...  To conclude the semester, teams created prototype machines for printing molten glass, soft serve ice cream, biodegradable material, and carbon fiber composites, as well as for large area parallel extrusion  ...  -Students designed and built a system for extrusion-based AM of soft-serve ice cream.  ... 
doi:10.1016/j.addma.2016.03.001 fatcat:jygzx6b7grhrjhe4z2n57mbpeu

On a contribution to study some mechanical properties of WEEE recycled polymer blends

Anissa Eddhahak
2021 Journal of Applied Polymer Science  
First, a preliminary work of sorting and characterization of the wastes was necessary to identify the predominant polymer components in the lots.  ...  The aim of this study is to investigate the macroscopic use properties of 100% recycled polymers and compare them with the virgin materials.  ...  ACKNOWLEDGMENTS The author would like to thank the industrial collaboration of Ecosystem company as well as Dr.  ... 
doi:10.1002/app.51250 fatcat:pbi5xby2vjcz7kee7slkirazqi

3‐Dimensional Printing of Hydrogel‐Based Nanocomposites: A Comprehensive Review on the Technology Description, Properties, and Applications

Sanaz Soleymani Eil Bakhtiari, Hamid Reza Bakhsheshi-Rad, Saeed Karbasi, Mahmood Razzaghi, Mohamadreza Tavakoli, Ahmad Fauzi Ismail, Safian Sharif, Seeram RamaKrishna, Xiongbiao Chen, Filippo Berto
2021 Advanced Engineering Materials  
The degree of swelling depends on the composition of the polymer, the density, and the Increasing demand for customized implants and tissue scaffolds requires advanced biomaterials and fabricating processes  ...  dry weight, while they are hardly dissolved in water. [4] Their water retention properties are primarily because of the existence of hydrophilic groups in polymer chains such as amido, amino, carboxyl,  ...  of this research.  ... 
doi:10.1002/adem.202100477 fatcat:ijkwoqzxyvgfvjizq5dvkslv4i

Viscoelasticity of dense suspensions of thermosensitive microgel mixtures undergoing colloidal gelation

Saori Minami, Takumi Watanabe, Daisuke Suzuki, Kenji Urayama
2018 Soft Matter  
Viscoelasticity of dense suspensions of thermosensitive microgel mixtures exhibits characteristic temperature-dependence resulting from colloidal gelation.  ...  ORG3-14] Extrusion Foaming with Thermal Expandable Microcapsules Depending on Rheological Property of Base Polymer and Processing Condition Shota TAKIGUCHI (Yamagata University Japan) [ORG2-02  ...  Polymer Solutions & Melts G6. Suspensions, Colloids, and Glasses S3. Honorary Session for Prof. Seung Jong LEE G4. Computational Rheology G1. Materials Processing S2.  ... 
doi:10.1039/c7sm02411h pmid:29411837 fatcat:npqgqbbvkngqrlifxl4zwlpj7y

3D-Printing and Machine Learning Control of Soft Ionic Polymer-Metal Composite Actuators

James D. Carrico, Tucker Hermans, Kwang J. Kim, Kam K. Leang
2019 Scientific Reports  
This paper presents a new manufacturing and control paradigm for developing soft ionic polymer-metal composite (IPMC) actuators for soft robotics applications.  ...  Second, Bayesian optimization is used as a learning-based control approach to help mitigate complex time-varying dynamic effects in 3D-printed actuators.  ...  Il-Kwon Oh of KAIST in South Korea for fruitful discussions on IPMC development and Justin Ngo from the DARC Lab for creating the 3D-printed example in Fig. 2 .  ... 
doi:10.1038/s41598-019-53570-y pmid:31767889 pmcid:PMC6877587 fatcat:wpeuusoosvckzn7ievta2kxufy

Personalized Anti-Vibration Protection for Telematics Devices in Urban Freight Transport Vehicles

Jacek Wojnowski, Jarosław Chmiel
2021 Energies  
It was found that thermoplastic elastomers and fused deposition modeling (FDM) have huge potential in shaping the physical properties of small, elastomeric absorbers.  ...  Three-dimensional printing techniques play an increasingly important role in manufacturing small polymer parts with tailored properties.  ...  Acknowledgments: We thank Lech Dorobczyński (Maritime University of Szczecin, Mechatronics and Electrical Engineering Faculty) for verifying the numerical models used in the article.  ... 
doi:10.3390/en14144193 fatcat:z46vdlludzhavoaiukx6l4pqeq

Recent Trends and Innovation in Additive Manufacturing of Soft Functional Materials

Jaime Eduardo Regis, Anabel Renteria, Samuel Ernesto Hall, Md Sahid Hassan, Cory Marquez, Yirong Lin
2021 Materials  
For this reason, this review aims to highlights recent development and advances in AM processable soft materials with self-healing, shape memory, electronic, chromic or any combination of these functional  ...  The growing demand for wearable devices, soft robotics, and tissue engineering in recent years has led to an increased effort in the field of soft materials.  ...  VP has been of interest for processing SMPs due to its in-situ polymerization process that allows the fabrication of elaborate geometries for very specific applications.  ... 
doi:10.3390/ma14164521 pmid:34443043 pmcid:PMC8399226 fatcat:tdzydk36k5dkvkom7mcgf6vmbm

3D Printing in Pharmaceutical and Medical Applications – Recent Achievements and Challenges

Witold Jamróz, Joanna Szafraniec, Mateusz Kurek, Renata Jachowicz
2018 Pharmaceutical Research  
The 3D printing has become one of the most revolutionary and powerful tool serving as a technology of precise manufacturing of individually developed dosage forms, tissue engineering and disease modeling  ...  Currently developed techniques of 3D printing are briefly described while comprehensive analysis of extrusion-based methods as the most intensively investigated is provided.  ...  Principles of Extrusion-Based Methods Hot melt extrusion (HME) as well as extrusion of semisolid materials are well established processes in the field of pharmaceutical technology.  ... 
doi:10.1007/s11095-018-2454-x pmid:29998405 pmcid:PMC6061505 fatcat:3h7tvaiezzbitcds25r3zkwotu

Additive Manufacturing Approaches for Hydroxyapatite‐Reinforced Composites

Mario Milazzo, Nicola Contessi Negrini, Stefania Scialla, Benedetto Marelli, Silvia Farè, Serena Danti, Markus J. Buehler
2019 Advanced Functional Materials  
Here we review applications of AM techniques to process HA-reinforced composites and biocomposites for the production of scaffolds with biological matrices, including cellular tissues.  ...  The primary outcomes of recent investigations in terms of morphological, structural, and in vitro and in vivo biological properties of the materials are discussed.  ...  by a number of molecular dynamics (MD) models and confirmed experimentally  ... 
doi:10.1002/adfm.201903055 fatcat:3yrhlawvlvckrh3unl52niyhmi
« Previous Showing results 1 — 15 out of 1,623 results