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Journal articles on the topic 'Automatic optimisation'

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Published: 4 June 2021
Last updated: 1 February 2022

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1

Hamidavi, Tofigh, Sepehr Abrishami, Pasquale Ponterosso, David Begg, and Nikos Nanos. "OSD." Construction Innovation 20, no. 2 (March 14, 2020): 149–69. http://dx.doi.org/10.1108/ci-11-2019-0126.

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Purpose The paper aims to leverage the importance of the integrated automatic structural design for tall buildings at the early stage. It proposes to use an automatic prototype to perform the structural design, analysis and optimisation in a building information modelling (BIM)-based platform. This process starts with extracting the required information from the architectural model in Revit Autodesk, such as boundary conditions and designs different options of the structural models in Robot Autodesk. In this process, Dynamo for Revit is used to define the mathematical functions to use different variables and generate various structural models. The paper aims to expand the domain of automation in the BIM platform to reduce the iterative process in different areas such as conceptual structural design and collaboration between architects and structural engineers to reduce the time and cost at the early stages. Design/methodology/approach The paper begins with an exploratory research by adopting a qualitative methodology and using open-ended questions to achieve more information about the phenomenon of automation and interoperability between structural engineers and architects and gain new insight into this area. Furthermore, correlation research is used by adopting quantitative and short questions to compare the proposed prototype with the traditional process of the structural design and optimisation and the interoperability between architects and engineers and consequently, validate the research. Findings As an outcome of the research, a structural design optimisation (SDO) prototype was developed to semi-automate the structural design process of tall buildings at the early stages. Moreover, the proposed prototype can be used during the early stage of structural design in different areas such as residential buildings, bridges, truss, reinforced concrete detailing, etc. Moreover, comprehensive literature regarding using automation in structural design, optimisation process and interoperability between architects and engineers is conducted that provides a new insight to contribute to future research and development. Research limitations/implications Due to the time limit, the paper results may lack in a comprehensive automatic structural design process. Therefore, the researchers are encouraged to expand the workability of the prototype for a comprehensive automatic design check such as automatic design for the minimum deflection, displacement of different types of buildings. Practical implications The prototype includes implications for the development of different automatic designs. Originality/value The focus of this paper is the optimisation of the structural design in the BIM platform by using automation. This combination is one of the novelties of this paper, and the existing literature has a very limited amount of information and similar work in this area, especially interoperability between architects and engineers.
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2

Hinterberger, Christof, Rolf Kaiser, and Mark Olesen. "Automatic shape optimisation of exhaust systems." Auto Tech Review 2, no. 3 (March 2013): 40–43. http://dx.doi.org/10.1365/s40112-013-0257-3.

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3

Sturdy, Derek. "Search Engine Optimisation and Automatic Classification." Legal Information Management 10, no. 1 (March 2010): 24–28. http://dx.doi.org/10.1017/s1472669610000071.

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AbstractDerek Sturdy explains the importance of search engine optimisation for the legal information professional involved in the organisation's website in the Google era and suggests that the most important pieces of information are the title and the abstract. He also discusses the rise in automatic classification in the enterprise search context.
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Shahpar, S. "Challenges to overcome for routine usage of automatic optimisation in the propulsion industry." Aeronautical Journal 115, no. 1172 (October 2011): 615–25. http://dx.doi.org/10.1017/s0001924000006308.

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Abstract In industry, there is an ever-increasing requirement not only to design high performance new products but also to deliver them at lower cost and in shorter time. To meet these demanding engineering challenges, it is not sufficient to treat the different disciplines involved in a product design in isolation; rather they must be considered together as an integrated system that reflects the dependencies and interactions of the different disciplines. The design process must be automated to meet the stringent design time-lines. In spite of promising forays for over a decade, automatic design optimisation (ADO) and multidisciplinary optimisation (MDO) has not been widely adapted by the Turbomachinery design practitioners. This presentation will explore some of the technical and nontechnical barriers such as cultural and organisational issues that must be addressed if ADO/MDO is to be used routinely in industry. Some recent, successful application of automatic optimisation is also reported herein.
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Liu, Cong, Aimin Zhou, and Guixu Zhang. "Automatic clustering method based on evolutionary optimisation." IET Computer Vision 7, no. 4 (August 2013): 258–71. http://dx.doi.org/10.1049/iet-cvi.2012.0187.

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Al-Mouhamed, Mayez, and Ayaz ul Hassan Khan. "Exploration of automatic optimisation for CUDA programming." International Journal of Parallel, Emergent and Distributed Systems 30, no. 4 (September 16, 2014): 309–24. http://dx.doi.org/10.1080/17445760.2014.953158.

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7

Helle, K. B., T. O. Müller, P. Astrup, and J. E. Dyve. "Automatic optimisation of gamma dose rate sensor networks: The DETECT Optimisation Tool." Computers & Geosciences 66 (May 2014): 158–67. http://dx.doi.org/10.1016/j.cageo.2013.12.014.

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8

Kiani, Mansoor, Stephen Bonsall, Jin Wang, and Alan Wall. "An Experimental Evaluation of the Economic Feasibility of Automated Quayside Cranes." Marine Technology Society Journal 40, no. 1 (March 1, 2006): 51–61. http://dx.doi.org/10.4031/002533206787353682.

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The majority of the studies on Quayside Cranes (QSCs) focus on optimising the automatic capabilities of the cranes and very few have studied their economic implications. This paper examines the economic feasibility of reducing QSCs' cycle-times resulting from automated features installed on existing post-Panamax cranes. It demonstrates that a considerable increase in productivity of QSCs is related directly or indirectly to an expected reduction of crane cycle-times. The study sets up the need for the proposed improvements through automation and explains the concepts of the systems involved. The concept offered by the proposed improvements distinguishes between the traditional system of loading and discharging of the containers and the automated methods. The evaluations and analyses in this study demonstrate that optimisation of the quayside operation enables the terminal operators to reduce turnaround time and port stays of containerships. The study illustrates that the expected economic benefits achieved from the improvement of the QSCs' performance, with regard to adoption of automated devices in this experiment, far exceeds the cost of adopting the various automatic devices.
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Walker, Martin, Mark-Oliver Reiser, Sara Tucci-Piergiovanni, Yiannis Papadopoulos, Henrik Lönn, Chokri Mraidha, David Parker, DeJiu Chen, and David Servat. "Automatic optimisation of system architectures using EAST-ADL." Journal of Systems and Software 86, no. 10 (October 2013): 2467–87. http://dx.doi.org/10.1016/j.jss.2013.04.001.

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10

Girdinio, P., and M. Nervi. "Techniques for the automatic optimisation of active shields." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 20, no. 3 (September 2001): 732–39. http://dx.doi.org/10.1108/03321640110393734.

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11

Kemp, Samuel E., Paul A. Roach, Andrew J. Ware, and Ian D. Wilson. "Artificial Intelligence for Automatic Container Stowage Planning Optimisation." Ship Technology Research 50, no. 4 (October 2003): 151–56. http://dx.doi.org/10.1179/str.2003.50.4.002.

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Barhate, Abhijit, Piyush Patel, and Egil Abrahamsen. "Real-time drilling optimisation – driving drilling excellence." APPEA Journal 59, no. 1 (2019): 196. http://dx.doi.org/10.1071/aj18231.

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Here we explore a real-time solution that anticipates drilling events and avoid delays caused by such issues as poor hole cleaning, higher torque and drag, swab and surge, stuck pipe, lost circulation, formation damage and wellbore instability. This is important if drilling optimisation is a major technical and corporate goal or if you wish to go beyond the traditional approach of collecting real-time data only to monitor operations. The presented state-of-the-art ‘real-time drilling optimisation’ solution creates a dynamic, real-time picture of the entire wellbore and key drilling variables and parameters using advanced, tightly coupled thermodynamic, hydraulic and mechanical drilling models and trend analysis applications to anticipate potential drilling issues in real-time while drilling. The solution can also be used to perform scenario based ‘what-if’ analysis and ‘look-ahead’ simulations of drilling operation with the purpose to analyse outcome of alternative operating scenarios. This is an effective solution that simplifies real-time data analysis by using trends and deviations between modelled and actual data to predict changing wellbore conditions and developing a digital twin of a wellbore. This paper includes robotic drilling automation, aimed at reducing invisible loss time, enhancing drilling efficiency and safety by applying operational safeguards to the drilling control system, providing automatic safety mechanisms and enabling automatic sequences. This paper highlights technical cases demonstrating how this analytic solution not only auto-detects symptoms (which can lead to drilling events or hazards, invisible loss time and non-productive time) but also optimises drilling performance through simulation well ahead of time, thus driving drilling efficiency.
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Egorov, I. N., and S. I. Egorova. "OPTIMISATION OF AUTOMATIC DOSED MOULD FILLING WITH FERROMAGNETIC POWDERS." Izvestiya Vuzov. Poroshkovaya Metallurgiya i Funktsional’nye Pokrytiya (Universitiesʹ Proceedings. Powder Metallurgy аnd Functional Coatings), no. 1 (March 19, 2018): 11–17. http://dx.doi.org/10.17073/1997-308x-2018-1-11-17.

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Xia, C. C., Y. J. Gou, S. H. Li, W. F. Chen, and C. Shao. "An Automatic Aerodynamic Shape Optimisation Framework Based on DAKOTA." IOP Conference Series: Materials Science and Engineering 408 (October 1, 2018): 012021. http://dx.doi.org/10.1088/1757-899x/408/1/012021.

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Hosseini Shirvani, Mirsaeid, and Alireza Babazadeh Gorji. "Optimisation of automatic web services composition using genetic algorithm." International Journal of Cloud Computing 9, no. 4 (2020): 397. http://dx.doi.org/10.1504/ijcc.2020.10034633.

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Shirvani, Mirsaeid Hosseini, and Alireza Babazadeh Gorji. "Optimisation of automatic web services composition using genetic algorithm." International Journal of Cloud Computing 9, no. 4 (2020): 397. http://dx.doi.org/10.1504/ijcc.2020.112313.

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Shirvani, Mirsaeid Hosseini, and Alireza Babazadeh Gorji. "Optimisation of automatic web services composition using genetic algorithm." International Journal of Cloud Computing 9, no. 4 (2020): 397. http://dx.doi.org/10.1504/ijcc.2020.112313.

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18

Butwell, A. J., J. M. Burns, R. S. Fielden, and M. J. Berry. "The Application of ICA in Sewage Treatment – Witney Evaluation and Demonstration Facility (EDF)." Water Science and Technology 21, no. 10-11 (October 1, 1989): 1239–48. http://dx.doi.org/10.2166/wst.1989.0322.

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The Witney Sewage Treatment Works of Thames Water has been established as the Evaluation and Demonstration Facility (EDF) for instrumentation, control and automation (ICA) in sewage treatment. The objectives of the process related EDF programme have included demonstration of the viability of computer-based process management systems, the investigation of the interactions of processes and the development of methods for their optimisation. Evaluation of process monitoring instrumentation has demonstrated that whilst severe shortcomings still exist in some areas reliable process automation can be achieved. Successful routine operation of the Witney plant has been maintained by the automatic control system and a detailed assessment of the main control functions has shown benefits which include cost savings, more accurate control and early warning of equipment failure. Progress has also been made in the modelling both of process performance and of operating costs. This work will lead to the development of software tools to aid process management and to enable process optimisation.
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19

Alejo, L., E. Corredoira, F. Sánchez-Muñoz, C. Huerga, Z. Aza, R. Plaza-Núñez, A. Serrada, et al. "Radiation dose optimisation for conventional imaging in infants and newborns using automatic dose management software: an application of the new 2013/59 EURATOM directive." British Journal of Radiology 91, no. 1086 (June 2018): 20180022. http://dx.doi.org/10.1259/bjr.20180022.

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Objective: The new 2013/59 EURATOM Directive (ED) demands dosimetric optimisation procedures without undue delay. The aim of this study was to optimise paediatric conventional radiology examinations applying the ED without compromising the clinical diagnosis. Methods: Automatic dose management software (ADMS) was used to analyse 2678 studies of children from birth to 5 years of age, obtaining local diagnostic reference levels (DRLs) in terms of entrance surface air kerma. Given local DRL for infants and chest examinations exceeded the European Commission (EC) DRL, an optimisation was performed decreasing the kVp and applying the automatic control exposure. To assess the image quality, an analysis of high-contrast resolution (HCSR), signal-to-noise ratio (SNR) and figure of merit (FOM) was performed, as well as a blind test based on the generalised estimating equations method. Results: For newborns and chest examinations, the local DRL exceeded the EC DRL by 113%. After the optimisation, a reduction of 54% was obtained. No significant differences were found in the image quality blind test. A decrease in SNR (−37%) and HCSR (−68%), and an increase in FOM (42%), was observed. Conclusion: ADMS allows the fast calculation of local DRLs and the performance of optimisation procedures in babies without delay. However, physical and clinical analyses of image quality remain to be needed to ensure the diagnostic integrity after the optimisation process. Advances in knowledge: ADMS are useful to detect radiation protection problems and to perform optimisation procedures in paediatric conventional imaging without undue delay, as ED requires.
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20

Moghaddam, Mohammad Jafar Hadidian, Mehdi Bigdeli, Saber Arabi Nowdeh, and Mehdi Golshani Monfared. "Design optimisation of PID controller in automatic voltage regulator system using teaching-learning based optimisation algorithm." International Journal of Power and Energy Conversion 7, no. 4 (2016): 377. http://dx.doi.org/10.1504/ijpec.2016.079890.

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Nowdeh, Saber Arabi, Mehdi Golshani Monfared, Mohammad Jafar Hadidian Moghaddam, and Mehdi Bigdeli. "Design optimisation of PID controller in automatic voltage regulator system using teaching-learning based optimisation algorithm." International Journal of Power and Energy Conversion 7, no. 4 (2016): 377. http://dx.doi.org/10.1504/ijpec.2016.10000448.

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22

Kuczyńska-Chałada, Marzena, and Roksana Poloczek. "Optimisation of Logistics Processes Using Simulation Tools." Multidisciplinary Aspects of Production Engineering 3, no. 1 (September 1, 2020): 184–94. http://dx.doi.org/10.2478/mape-2020-0016.

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AbstractOptimization of production logistics processes through the use of simulation tools brings a lot of benefits to a production company, and thus significantly reduces production costs. Increasing competition resulting from the use of production automation to increase productivity has increased the complexity of production systems that can only be analysed by simulation. Production logistics performs management functions such as planning, motivating, organising and controlling. It does not deal with technological processes, but the organisation of physical delivery and displacement of components and information in the system. An important feature of production logistics is combining supply logistics with distribution logistics. If the production logistics is properly organised, it provides access to all materials and components of a given product during the implementation of a specific order. Simulation tools ensure continuity and rhythm of production after it is started, as well as convenient conditions for using modern internal transport. The article presents the Flexsim simulation tool, which was used to improve production logistics in the studied enterprise. The programme also contributed as an opportunity to improve and shorten production cycles, maintain optimal inventories, select packaging and logistics units, as well as the ability to use automatic identification of raw materials, materials or semi-finished products.
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23

Malnar, D., V. Sucic, and J. M. O'Toole. "Automatic quality assessment and optimisation of quadratic time–frequency representations." Electronics Letters 51, no. 13 (June 2015): 1029–31. http://dx.doi.org/10.1049/el.2015.0489.

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24

Zhang, Zhiming, Jun Sun, Binbin Lu, and Yaoshuai Duan. "Turning mechanism and optimisation design of automatic screen printing machine." International Journal of Wireless and Mobile Computing 15, no. 2 (2018): 151. http://dx.doi.org/10.1504/ijwmc.2018.095690.

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Duan, Yaoshuai, Zhiming Zhang, Jun Sun, and Binbin Lu. "Turning mechanism and optimisation design of automatic screen printing machine." International Journal of Wireless and Mobile Computing 15, no. 2 (2018): 151. http://dx.doi.org/10.1504/ijwmc.2018.10016739.

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Zeeden, Christian, Stefanie Kaboth, Frederik J. Hilgen, and Jacques Laskar. "Taner filter settings and automatic correlation optimisation for cyclostratigraphic studies." Computers & Geosciences 119 (October 2018): 18–28. http://dx.doi.org/10.1016/j.cageo.2018.06.005.

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Bloodworth, NB, and JH Hutchinson. "100Do automatic CRT optimisation algorithms work? A comparison of techniques." EP Europace 19, suppl_1 (October 1, 2017): i42. http://dx.doi.org/10.1093/europace/eux283.094.

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Ahmat, Norhayati, Gabriela González Castro, and Hassan Ugail. "Automatic shape optimisation of pharmaceutical tablets using Partial Differential Equations." Computers & Structures 130 (January 2014): 1–9. http://dx.doi.org/10.1016/j.compstruc.2013.09.001.

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29

Shterenlikht, Anton, Mohammad M. Kashani, Nicholas A. Alexander, Gethin Williams, and Adam J. Crewe. "Autotuning of Isotropic Hardening Constitutive Models on Real Steel Buckling Data with Finite Element Based Multistart Global Optimisation on Parallel Computers." Modelling and Simulation in Engineering 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/6132106.

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An automatic framework for tuning plastic constitutive models is proposed. It is based on multistart global optimisation method, where the objective function is provided by the results of multiple elastoplastic finite element analyses, executed concurrently. Wrapper scripts were developed for fully automatic preprocessing, including model and mesh generation, analysis, and postprocessing. The framework is applied to an isotropic power hardening plasticity using real load/displacement data from multiple steel buckling tests. M. J. D. Powell’s BOBYQA constrained optimisation package was used for local optimisation. It is shown that using the real data presents multiple problems to the optimisation process because (1) the objective function can be discontinuous, yet (2) relatively flat around multiple local minima, with (3) similar values of the objective function for different local minima. As a consequence the estimate of the global minimum is sensitive to the amount of experimental data and experimental noise. The framework includes the verification step, where the estimate of the global minimum is verified on a different geometry and loading. A tensile test was used for verification in this work. The speed of the method critically depends on the ability to effectively parallelise the finite element solver. Three levels of parallelisation were exploited in this work. The ultimate limitation was the availability of the finite element commercial solver license tokens.
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Lindström, Göran. "A Simple Automatic Calibration Routine for the HBV Model." Hydrology Research 28, no. 3 (June 1, 1997): 153–68. http://dx.doi.org/10.2166/nh.1997.0009.

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A simple, but efficient, method for automatic calibration of the conceptual HBV rainfall-runoff model was developed. A new criterion, which combines the commonly used efficienyy criterion R2 and the relative volume error was introduced. Optimising this combined criterion resulted in R2 values nearly as high as those for optimssing only R2, but with much smaller volume errors. An earlier automatic calibration method for the HBV model relied on the use of differett criteria for different parameters. With the simplification to one single criterion, the optimum search method could be made more efficient. The optimisation is made for one parameter at a time, while the others are kept constant. This one-dimensional optimisation is repeated in a loop for all parameters. A new loop is performed as long as there is a sufficiently large improvement since the last one. After each loop a search is made in the direction which is defined by the differences in parameter values between the two latest loops. The calibration routine was developed for, and tested with, the HBV model, but it should be general enough to be applicable to other modess as well.
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Coope, Ian D. "A conjugate direction implementation of the BFGS algorithm with automatic scaling." Journal of the Australian Mathematical Society. Series B. Applied Mathematics 31, no. 1 (July 1989): 122–34. http://dx.doi.org/10.1017/s0334270000006524.

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AbstractA new implementation of the BFGS algorithm for unconstrained optimisation is reported which utilises a conjugate factorisation of the approximating Hessian matrix. The implementation is especially useful when gradient information is estimated by finite difference formulae and it is well suited to machines which are able to exploit parallel processing.
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Myhr, Ole Runar, Rune Østhus, and Trond Furu. "A Novel Methodology for Optimisation of Product Properties and Production Costs in Fabrication of Aluminium Alloys." Materials Science Forum 794-796 (June 2014): 676–81. http://dx.doi.org/10.4028/www.scientific.net/msf.794-796.676.

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The present paper describes a novel methodology for optimization of product properties and production costs in fabrication of aluminium alloys. The main idea is to represent each operation along the process chain by predictive tools, which include material-, mechanical-, cost-and logistics models. An optimisation tool is used to collect the simulation models into a common software environment, which allows fully automatic simulations to be carried out. When this coupling is established, the models are run in sequence using different types of optimisation strategies. The methodology has been applied for optimisation of strength, grain structure and costs of 6xxx series aluminium extrusions. The results indicate that the present methodology is sufficiently relevant and comprehensive to be used as a tool in fabrication of various aluminium products, for instance in optimisation of end-user properties and production costs of extruded, rolled or foundry based alloys.
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IRLIK, Maciej. "TRAIN HEADWAY OPTIMISATION USING VIRTUAL BLOCKS." Scientific Journal of Silesian University of Technology. Series Transport 112 (September 1, 2021): 75–84. http://dx.doi.org/10.20858/sjsutst.2021.112.6.

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Although the implementation of a new Automatic Train Protection (ATP) system increases the safety level, it also exerts some impact on the blocking time in block sections, and consequently, on the headway between trains. At the same time, ATP systems introduce a train positioning system based on odometry calculation and reporting back to the trackside system. This paper describes the concept of using virtual blocks based on train position reporting in the ATP system for purposes of non-occupancy determination. Virtual blocks can be used to reduce headways on railway lines without increasing the number of trackside signalling devices. Preliminary capacity assessment was performed to calculate the average headway depending on the signalling system with reference to a case study.
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Blot, Aymeric, Marie-Éléonore Kessaci, Laetitia Jourdan, and Holger H. Hoos. "Automatic Configuration of Multi-Objective Local Search Algorithms for Permutation Problems." Evolutionary Computation 27, no. 1 (March 2019): 147–71. http://dx.doi.org/10.1162/evco_a_00240.

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Automatic algorithm configuration (AAC) is becoming a key ingredient in the design of high-performance solvers for challenging optimisation problems. However, most existing work on AAC deals with configuration procedures that optimise a single performance metric of a given, single-objective algorithm. Of course, these configurators can also be used to optimise the performance of multi-objective algorithms, as measured by a single performance indicator. In this work, we demonstrate that better results can be obtained by using a native, multi-objective algorithm configuration procedure. Specifically, we compare three AAC approaches: one considering only the hypervolume indicator, a second optimising the weighted sum of hypervolume and spread, and a third that simultaneously optimises these complementary indicators, using a genuinely multi-objective approach. We assess these approaches by applying them to a highly-parametric local search framework for two widely studied multi-objective optimisation problems, the bi-objective permutation flowshop and travelling salesman problems. Our results show that multi-objective algorithms are indeed best configured using a multi-objective configurator.
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Porziani, Stefano, Corrado Groth, Luca Mancini, Riccardo Cenni, Matteo Cova, and Marco Evangelos Biancolini. "Optimisation of industrial parts by mesh morphing enabled automatic shape sculpting." Procedia Structural Integrity 24 (2019): 724–37. http://dx.doi.org/10.1016/j.prostr.2020.02.064.

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Iskandar, J., S. Alrasyid, Eqi Nurhaqiqi, F. Andria, and E. T. Tosida. "Optimisation of electronics and mechanics system of automatic egg incubator machine." IOP Conference Series: Materials Science and Engineering 621 (November 7, 2019): 012004. http://dx.doi.org/10.1088/1757-899x/621/1/012004.

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Damouche, Nasrine, Matthieu Martel, and Alexandre Chapoutot. "Numerical program optimisation by automatic improvement of the accuracy of computations." International Journal of Intelligent Engineering Informatics 6, no. 1/2 (2018): 115. http://dx.doi.org/10.1504/ijiei.2018.091016.

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Chapoutot, Alexandre, Nasrine Damouche, and Matthieu Martel. "Numerical program optimisation by automatic improvement of the accuracy of computations." International Journal of Intelligent Engineering Informatics 6, no. 1/2 (2018): 115. http://dx.doi.org/10.1504/ijiei.2018.10012074.

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Azaro, R., L. Ioriatti, M. Martinelli, and A. Massa. "Automatic design and optimisation of EMI filter using commercially-available components." Electronics Letters 43, no. 6 (2007): 324. http://dx.doi.org/10.1049/el:20073923.

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Yue, Caixu, Xianli Liu, Chunbin Cai, and Mingming Yu. "Parametric modelling and automatic optimisation of high-speed hard cutting process." International Journal of Manufacturing Research 10, no. 2 (2015): 184. http://dx.doi.org/10.1504/ijmr.2015.069716.

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Wurtz, F., J. Bigeon, J. L. Coulomb, and P. Eustache. "Automatic task optimisation for finite element loop computations: an expert tool." IEEE Transactions on Magnetics 31, no. 3 (May 1995): 1678–83. http://dx.doi.org/10.1109/20.376358.

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42

Hoodorozhkov, Sergey I., Andrey A. Krasilnikov, and Matvey S. Gubachev. "Optimisation of an Algorithm for Automatic Control of Transmission in a Wheeled Tractor." International Journal of Automotive and Mechanical Engineering 18, no. 3 (September 21, 2021): 9051–60. http://dx.doi.org/10.15282/ijame.18.3.2021.17.0694.

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The paper considers a digital model of a wheeled agricultural tractor, as well as algorithms for automatic control of the engine and transmission. Simulation of the working conditions was performed in MATLAB and its applications, Simulink, Sim-scape. The tractor model is based on a systemic approach and includes such subsystems as the engine, transmission, undercarriage, hook load, and control actions from the operator, as well as functions of logic and optimisation for gear shifting. With the help of fundamental blocks of the Matlab package, models of tractor physical components are created. The fundamental blocks of the package serve to model the physical components of the tractor: engine, transmission control system, the transmission that includes friction clutches, gears, shafts ties with the necessary characteristics. Simulation of the working processes of a tractor unit is performed with optimisation of the laws of engine and transmission control according to the criterion of fuel efficiency and maximum power usage. The control system parameters were optimised in the transport mode, as well as in the maximum power mode in the traction range. As an illustration of the use of this analysis method, a solution to the problem of optimisation of an agricultural wheeled tractor operating modes is given. The results of this mathematical simulation are presented in this paper. Parameters of tractor operation control algorithm, which provide minimum fuel consumption in tractor operating cycles, are given. The research results showed the effectiveness of the proposed algorithms and the digital model. The presented digital model allows to debug the operating tractor control algorithms and offers an engineering practice for optimising automatic control of the agricultural tractor engine and transmission.
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43

Krauße, T., J. Cullmann, P. Saile, and G. H. Schmitz. "Robust multi-objective calibration strategies – possibilities for improving flood forecasting." Hydrology and Earth System Sciences 16, no. 10 (October 15, 2012): 3579–606. http://dx.doi.org/10.5194/hess-16-3579-2012.

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Abstract. Process-oriented rainfall-runoff models are designed to approximate the complex hydrologic processes within a specific catchment and in particular to simulate the discharge at the catchment outlet. Most of these models exhibit a high degree of complexity and require the determination of various parameters by calibration. Recently, automatic calibration methods became popular in order to identify parameter vectors with high corresponding model performance. The model performance is often assessed by a purpose-oriented objective function. Practical experience suggests that in many situations one single objective function cannot adequately describe the model's ability to represent any aspect of the catchment's behaviour. This is regardless of whether the objective is aggregated of several criteria that measure different (possibly opposite) aspects of the system behaviour. One strategy to circumvent this problem is to define multiple objective functions and to apply a multi-objective optimisation algorithm to identify the set of Pareto optimal or non-dominated solutions. Nonetheless, there is a major disadvantage of automatic calibration procedures that understand the problem of model calibration just as the solution of an optimisation problem: due to the complex-shaped response surface, the estimated solution of the optimisation problem can result in different near-optimum parameter vectors that can lead to a very different performance on the validation data. Bárdossy and Singh (2008) studied this problem for single-objective calibration problems using the example of hydrological models and proposed a geometrical sampling approach called Robust Parameter Estimation (ROPE). This approach applies the concept of data depth in order to overcome the shortcomings of automatic calibration procedures and find a set of robust parameter vectors. Recent studies confirmed the effectivity of this method. However, all ROPE approaches published so far just identify robust model parameter vectors with respect to one single objective. The consideration of multiple objectives is just possible by aggregation. In this paper, we present an approach that combines the principles of multi-objective optimisation and depth-based sampling, entitled Multi-Objective Robust Parameter Estimation (MOROPE). It applies a multi-objective optimisation algorithm in order to identify non-dominated robust model parameter vectors. Subsequently, it samples parameter vectors with high data depth using a further developed sampling algorithm presented in Krauße and Cullmann (2012a). We study the effectivity of the proposed method using synthetical test functions and for the calibration of a distributed hydrologic model with focus on flood events in a small, pre-alpine, and fast responding catchment in Switzerland.
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44

Rovira, Noel Leon, Jose Maria Cueva, David Silva, and Jorge Gutierrez. "Automatic shape and topology variations in 3D CAD environments for genetic optimisation." International Journal of Computer Applications in Technology 30, no. 1/2 (2007): 59. http://dx.doi.org/10.1504/ijcat.2007.015697.

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Sountharrajan, S., E. Suganya, M. Karthiga, and C. Rajan. "Automatic glioblastoma multiforme detection using hybrid-SVM with improved particle swarm optimisation." International Journal of Biomedical Engineering and Technology 26, no. 3/4 (2018): 353. http://dx.doi.org/10.1504/ijbet.2018.089969.

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Rajan, C., E. Suganya, M. Karthiga, and S. Sountharrajan. "Automatic glioblastoma multiforme detection using hybrid-SVM with improved particle swarm optimisation." International Journal of Biomedical Engineering and Technology 26, no. 3/4 (2018): 353. http://dx.doi.org/10.1504/ijbet.2018.10011139.

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47

Tian, Guangzhao, Baoxing Gu, Kai Chen, Yufeng Liu, and Jiansheng Wei. "Method of automatic steering system design and parameter optimisation for small tractors." Journal of Engineering 2019, no. 22 (November 1, 2019): 8353–58. http://dx.doi.org/10.1049/joe.2019.1079.

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Fraj, A. Haj, and F. Pfeiffer. "A model based approach for the optimisation of gearshifting in automatic transmissions." International Journal of Vehicle Design 28, no. 1/2/3 (2002): 171. http://dx.doi.org/10.1504/ijvd.2002.001985.

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Kao, Yucheng, and Chien-Chih Chen. "Automatic clustering for generalised cell formation using a hybrid particle swarm optimisation." International Journal of Production Research 52, no. 12 (December 10, 2013): 3466–84. http://dx.doi.org/10.1080/00207543.2013.867085.

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Pittia, P., R. Furlanetto, M. Maifreni, F. Tassan Mangina, and M. Dalla Rosa. "Safe cooking optimisation by F-value computation in a semi-automatic oven." Food Control 19, no. 7 (July 2008): 688–97. http://dx.doi.org/10.1016/j.foodcont.2007.07.008.

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