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Journal articles on the topic 'Optimisation by simplex method'

Author: Grafiati

Published: 24 April 2022

Last updated: 30 July 2025

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1

Bellezza, Ivo. "Optimisation of landfill volume by the simplex method." Engineering Computations 21, no. 1 (2004): 53–65. http://dx.doi.org/10.1108/02644400410511837.

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Palahudin, Palahudin, Adinda Maha Dewi, Resti Rohayati, Salsa Septia Putri, Muhammad Syehan, and Ogin Herdiana. "Profit Optimisation On Risol Products By Using Simplex Method." Jurnal Fokus Manajemen 5, no. 1 (2025): 33–38. https://doi.org/10.37676/jfm.v5i1.7783.

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In an era of increasingly fierce business competition, the food industry faces the challenge of meeting consumer demand while managing resources efficiently to maximize profits. This research focuses on optimizing the profitability of risol products, snacks made from flour dough with various fillings, using the simplex method. The research method used is a quantitative approach with descriptive analysis. Data was collected from the Risol XYZ Plant through observations, interviews, and questionnaires. Data analysis is carried out by compiling a mathematical model that describes the function of

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Clayton, R. P., and R. F. Martinez-Botas. "Application of generic algorithms in aerodynamic optimisation design procedures." Aeronautical Journal 108, no. 1090 (2004): 611–20. http://dx.doi.org/10.1017/s0001924000000440.

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AbstractDirect optimisation techniques using different methods are presented and compared for the solution of two common flows: a two dimensional diffuser and a drag minimisation problem of a fixed area body. The methods studied are a truncated Newton algorithm (gradient method), a simplex approach (direct search method) and a genetic algorithm (stochastic method). The diffuser problem has a known solution supported by experimental data, it has one design performance measure (the pressure coefficient) and two design variables. The fixed area body also has one performance measure (the drag coef

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Siemek, Jakub, and Jerzy Stopa. "Optimisation of the wells placement in gas reservoirs using SIMPLEX method." Journal of Petroleum Science and Engineering 54, no. 3-4 (2006): 164–72. http://dx.doi.org/10.1016/j.petrol.2006.08.013.

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Da Costa, Julyane Karolyne Teixeira, Karina Gomes Angilelli, Kelly Roberta Spacino, Elisangela Tavares Da Silva, Livia Ramazzoti Chanan Silva, and Dionisio Borsato. "APPLICATION OF THE MULTIRESPONSE OPTIMISATION SIMPLEX METHOD TO THE BIODIESEL - B100 OBTAINING PROCESS." Semina: Ciências Exatas e Tecnológicas 37, no. 1 (2016): 107. http://dx.doi.org/10.5433/1679-0375.2016v37n1p107.

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<p>O processo de obtenção de biodiesel B100, a partir da transesterificação em meio básico, de uma mistura de óleo vegetal e gordura animal foi otimizado utilizando o método simplex supermodificado. Para otimização simultânea foram usados como respostas o rendimento, custo, estabilidade oxidativa e ponto de entupimento de filtro a frio (CFPP), e os limites foram estabelecidos de acordo com os dados experimentais e os parâmetros de conformidade estabelecidos pela legislação. A otimização multirresposta utilizando as equações preditivas, obtidas a partir do delineamento simplex-centroide a

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Zde Zar, U. "Simple Optimisation Method in Mammography." Radiation Protection Dosimetry 90, no. 1 (2000): 221–23. http://dx.doi.org/10.1093/oxfordjournals.rpd.a033124.

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Chmielewski, Tomasz, Tomasz Kuczek, and Piotr Oramus. "Optimisation of electric arc model parameters based on simplex annealing and genetic algorithms." MATEC Web of Conferences 252 (2019): 05001. http://dx.doi.org/10.1051/matecconf/201925205001.

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This paper presents the method for obtaining the coefficients of the dynamic Cassie-Mayr electric arc model by means of annealing and genetic optimisation algorithms. The extraction of the coefficients can be obtained by means of the iterative fitting process based on e.g. multiple measurements results. However, this requires a significant effort and can generate significant costs. The approach presented in this paper relies solely on simulations. The methodology used herein consists in finding the match to the maximum produced TRV generated during high-voltage shunt reactor current breaking,

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Lampart, Piotr, Łukasz Witanowski, and Piotr Klonowicz. "Efficiency Optimisation of Blade Shape in Steam and ORC Turbines." Mechanics and Mechanical Engineering 22, no. 2 (2020): 553–64. http://dx.doi.org/10.2478/mme-2018-0044.

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AbstractThis paper is devoted to direct constrained optimisation of blading systems of large power and small power turbines so as to increase their internal efficiency. The optimisation is carried out using hybrid stochastic-deterministic methods such as a combination of a direct search method of Hooke-Jeeves and simulated annealing or a combination of a bat algorithm and simplex method of Nelder-Mead. Among free shape parameters are blade number and stagger angle, stacking blade line parameters and blade section (profile) parameters.One practical example of efficiency optimisation of turbine

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Vivaldi, Valentina, Sara Sommariva, and Alberto Sorrentino. "A simplex method for the calibration of a MEG device." Communications in Applied and Industrial Mathematics 10, no. 2 (2019): 35–46. http://dx.doi.org/10.2478/caim-2019-0005.

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Abstract MagnetoEncephaloGraphy (MEG) devices are helmet–shaped arrays of sensors that measure the tiny magnetic fields produced by neural currents. As they operate at low temperature, they are typically immersed in liquid helium. However, during the cooling process the sensor position and shape can change, with respect to nominal values, due to thermal stress. This implies that an accurate sensor calibration is required before a MEG device is utilized in either neuroscientific research or clinical workflow. Here we describe a calibration scheme developed for the optimal use of a MEG system re

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Usenik, Janez. "FUZZY DYNAMIC LINEAR PROGRAMMING IN ENERGY SUPPLY PLANNING." Journal of Energy Technology 4, no. 4 (2024): 45–62. https://doi.org/10.18690/jet.4.4.45-62.2011.

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Linear programming is an important field of optimisation. Many practical problems can be expressed as linear programming problems and be solved with a simplex method. When all data in a linear program are determined and quantities are known in advance, the simplex algorithm, i.e. the simplex method, is explicit. However, in special cases the coefficients in the linear programming problem can be a) fuzzy numbers or b) functions of time with specific requests. In this manner, we have either fuzzy linear programming in the first situation or continuous dynamic linear programming in the second. Th

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Setyawan, Ferdinta D., Ilham Kuncahyo, and Wiwin Herdwiani. "Optimisation and Characterisation of Curcumin Nanoparticles with Chitosan-TPP Combination Using Ionic Gelation Method as a Cut Wound Healer." East Asian Journal of Multidisciplinary Research 3, no. 9 (2024): 4271–88. http://dx.doi.org/10.55927/eajmr.v3i9.10865.

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Curcumin has low oral bioavailability, low solubility, and is easily degraded, making its clinical application difficult. This study aims to determine the effect of optimum concentration and formula of chitosan and TPP in the preparation of curcumin nanoparticles on particle size, zeta potential, adsorption efficiency, and incision wound healing. The optimisation method used simplex lattice design method. There were 8 draft formulas consisting of a combination of chitosan and TPP. Each formula was tested for zeta potential value, adsorption efficiency, particle morphology, and wound healing ab

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García Soto, Andrés Ricardo, Gerardo Rodríguez Niño, and Carlos Alexander Trujillo. "Zeolite LTA synthesis: Optimising synthesis conditions by using the modified sequential simplex method." Ingeniería e Investigación 33, no. 3 (2013): 22–27. http://dx.doi.org/10.15446/ing.investig.v33n3.41039.

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This paper presents research concerning the simultaneous effect of the most influential synthesis variables in the preparation of Zeolite LTA. The simplex method was used for ascertaining optimal synthesis conditions, where the relative crystallinity (regarding a commercial sample) of synthesised zeolite was defined as response function. Crystallinity was measured by X-ray diffraction. Optimum conditions were found after 24 trials, giving 95.4% relative crystallinity and Na2O/SiO2=2.58, SiO2/Al2O3=1.45 and H2O/Na2O=46.92 molar ratios; 11.7 h crystal growth time, 6.1 h crystallisation time (rea

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Niegodajew, Paweł, Maciej Marek, Witold Elsner, and Łukasz Kowalczyk. "Power Plant Optimisation—Effective Use of the Nelder-Mead Approach." Processes 8, no. 3 (2020): 357. http://dx.doi.org/10.3390/pr8030357.

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This paper demonstrates the use of a combined software package including IPSEpro and MATLAB in the optimisation of a modern thermal cycle. A 900 MW power plant unit (operating at ultra-supercritical conditions) was considered as the study object. The Nelder-Mead simplex-based, direct search method was used to increase power plant efficiency and to find the optimal thermal cycle configuration. As the literature reveals, the Nelder-Mead approach is very sensitive to the simplex size and to the choice of method coefficients, i.e., reflection, expansion and contraction. When these coefficients are

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Nababan, Esther S. M., Agnes Sihaloho, Khatimatul Husna, and Rafida Ilham. "Production Optimization Using Fuzzy Linear programming Method (Case Study: UMKM Untir-untir and Raja Manis Factory)." Journal of Research in Mathematics Trends and Technology 4, no. 2 (2022): 15–23. http://dx.doi.org/10.32734/jormtt.v4i2.16640.

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Production efficiency and performance optimization in a company can be achieved by using an optimization model. An optimisation model can be written in a function of equation and equation known as a Linear Program. A Linear program can be combined with a fuzzy value to adjust a production problem model that is heavily dependent on an unstable supply. This modeling is known as Fuzzy Linear programming. Using Fuzzy Linear programming, the production problems of micro, small and medium-sized enterprises Untir-untir and King Sweet are analyzed and solved with the heLP of simulation programs. Fuzzy

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Eyere, Emagbetere and Idowu Temitope Adeleye. "Modelling and Optimisation of Levilised-Cost-of-Energy Optimisation for Plant Selection in an Off-Grid Hybrid Energy System." Journal of Energy Technology and Environment 6, no. 4 (2024): 81–92. https://doi.org/10.5281/zenodo.14525374.

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<em>This study aims to develop a selection tool that would optimise levelized-cost-of-energy (LCOE) for a hybrid energy generating and distribution systems using FUPRE as a case study. The research begins with a detailed LCOE modelling process, dissecting the cost components of the hybrid energy system. A sensitivity analysis is conducted to identify and assess the impact of various factors such as capital costs, operational expenses, and energy output on the LCOE. Optimum solutions for selecting a suitable plant for 9 different supply areas with various energy sources, including, diesel gener

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Curt, C., I. Allais, N. Perrot, V. Leblanc, and G. Trystram. "Optimisation of the meat emulsification process using at-line human evaluations and the Simplex method." Journal of Food Engineering 64, no. 1 (2004): 33–41. http://dx.doi.org/10.1016/j.jfoodeng.2003.09.010.

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17

Šeruga, Domen, and Marko Nagode. "Comparative analysis of optimisation methods for linking material parameters of exponential and power models: An application to cyclic stress–strain curves of ferritic stainless steel." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 233, no. 9 (2018): 1802–13. http://dx.doi.org/10.1177/1464420718790829.

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The four most commonly used optimisation methods for linking the material parameters of an exponential Armstrong–Frederick and a power Ramberg–Osgood model are compared for given cyclic stress–strain curves of a ferritic stainless steel EN 1.4512. These methods are the damped Gauss–Newton method, the Levenberg–Marquardt method, the Downhill Simplex method and a genetic algorithm. Globally optimal material parameters are obtained by parallel searches within the methods. The methods are tested for cyclic curves at 20 ℃, 300 ℃, 650 ℃ and 850 ℃. The optimal values of material parameters and R2 val

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18

Kamola, Mariusz. "Hybrid Approach to Design Optimisation: Preserve Accuracy, Reduce Dimensionality." International Journal of Applied Mathematics and Computer Science 17, no. 1 (2007): 53–71. http://dx.doi.org/10.2478/v10006-007-0006-3.

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Hybrid Approach to Design Optimisation: Preserve Accuracy, Reduce DimensionalityThe paper proposes a design procedure for the creation of a robust and effective hybrid algorithm, tailored to and capable of carrying out a given design optimisation task. In the course of algorithm creation, a small set of simple optimisation methods is chosen, out of which those performing best will constitute the hybrid algorithm. The simplicity of the method allows implementing ad-hoc modifications if unexpected adverse features of the optimisation problem are found. It is postulated to model a system that is

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19

Dr., Udeme Hanson Iron. "Flexural Strength Models for Normal Laterised and High Strength Laterised Concretes at Optimum Mix Proportions." Flexural Strength Models for Normal Laterised and High Strength Laterised Concretes at Optimum Mix Proportions 05, no. 07 (2022): 1767–84. https://doi.org/10.5281/zenodo.6880694.

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This study develops mathematical models for obtaining optimum flexural strengths of normal laterised(NLC) and high strength laterised concretes (HSLC). The models can be expressly used to evaluate the indirect tensile strengths of both types of concretes without going through the traditional methods of mix design. Optimum mixing ratios and optimum flexural strengths predicted are also supplied by the models. The three point load method was adopted for testing for the flexural strengths. Laterite, has been widely used to partially or wholly replace sand in concrete with resultant low strengths.

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20

Hajrin, Wahida, Windah Anugrah Subaidah, Yohanes Juliantoni, and Dyke Gita Wirasisya. "Application of Simplex Lattice Design Method on The Optimisation of Deodorant Roll-on Formula of Ashitaba (Angelica keiskei)." Jurnal Biologi Tropis 21, no. 2 (2021): 501. http://dx.doi.org/10.29303/jbt.v21i2.2717.

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Ashitaba is known to have antioxidant activity and gram-positive antibacterial activity that causes body odor. This is the potential activity for an active substance to be developed as deodorant. The appropriate formula is needed, so it is necessary to optimize the formula using the right method. This study aimed was to determine the application of the simplex lattice design method on the optimization of a deodorant roll-on formula of ashitaba extract. Ashitaba was extracted by the maceration method. The formula optimization design was determined using the simplex lattice design method by Desi

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Anil, Rana, Ajit Verma, and A. S. Srividya. "Optimisation of production machine scheduling using a two level mixed optimisation method." Yugoslav Journal of Operations Research 20, no. 2 (2010): 197–212. http://dx.doi.org/10.2298/yjor1002197a.

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This paper presents an application of a two level mixed optimization method on a machine scheduling problem of a government owned machine shop. Where evolutionary algorithm methods are suitable for solving complex, discrete space, and non-linear, discontinuous optimization problems; classical direct-search optimization methods are suitable and efficient in handling simple unimodal problems requiring less computation. Both methods are used at two levels, the first level decides which machines to be used for the machining operations and how much overtime (at extra cost) to be allotted to each wo

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Ha, Manh Hung, Viet Hung Truong, and Minh Phuong Nguyen. "Rao algorithm-based method for optimisation of steel frames using nonlinear inelastic analysis." Ministry of Science and Technology, Vietnam 63, no. 8 (2021): 35–39. http://dx.doi.org/10.31276/vjst.63(8).35-39.

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Metaheuristic optimisation algorithms have been increasingly used because of their superior ability to find globally optimal solutions. Theoretically, these algorithms are very powerful and can be applied in all types of optimisation problems. However, in reality, their performance depends on the characteristics of each optimisation problem class. In addition, the complexity of an algorithm is an important factor affecting its application in specific design problems. In this paper, the Rao optimisation algorithm, one of the newest metaheuristic algorithms, is presented for the optimisation alg

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Bempedelis, Nikolaos, Filippo Gori, Andrew Wynn, Sylvain Laizet, and Luca Magri. "Data-driven optimisation of wind farm layout and wake steering with large-eddy simulations." Wind Energy Science 9, no. 4 (2024): 869–82. http://dx.doi.org/10.5194/wes-9-869-2024.

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Abstract. Maximising the power production of large wind farms is key to the transition towards net zero. The overarching goal of this paper is to propose a computational method to maximise the power production of wind farms with two practical design strategies. First, we propose a gradient-free method to optimise the wind farm power production with high-fidelity surrogate models based on large-eddy simulations and a Bayesian framework. Second, we apply the proposed method to maximise wind farm power production by both micro-siting (layout optimisation) and wake steering (yaw angle optimisation

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Luangpaiboon, Pongchanun, and Sitthikorn Duangkaew. "Artificial Intelligence Mechanisms on Interactive Modified Simplex Method with Desirability Function for Optimising Surface Lapping Process." Mathematical Problems in Engineering 2014 (2014): 1–16. http://dx.doi.org/10.1155/2014/864586.

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A study has been made to optimise the influential parameters of surface lapping process. Lapping time, lapping speed, downward pressure, and charging pressure were chosen from the preliminary studies as parameters to determine process performances in terms of material removal, lap width, and clamp force. The desirability functions of the-nominal-the-best were used to compromise multiple responses into the overall desirability function level orDresponse. The conventional modified simplex or Nelder-Mead simplex method and the interactive desirability function are performed to optimise online the

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Nicol, R., P. Smith, and P. R. Raggatt. "The use of the simplex method for the optimisation of non-linear functions on a laboratory microcomputer." Computers in Biology and Medicine 16, no. 2 (1986): 145–52. http://dx.doi.org/10.1016/0010-4825(86)90038-7.

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Seminara, Edoardo, Giuseppe Laudani, Giuliana Baiamonte, and Michele Calì. "The Wing Structure of an F3J/F5J Competition Sailplane: Topological Optimisation with Simplex Method and Additive Manufacturing." International Review on Modelling and Simulations (IREMOS) 15, no. 6 (2022): 359. http://dx.doi.org/10.15866/iremos.v15i6.23066.

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Dutta, Joydeep. "On convex vector optimisation." Bulletin of the Australian Mathematical Society 61, no. 1 (2000): 85–88. http://dx.doi.org/10.1017/s0004972700022036.

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In this article we present a simple method to deduce necessary conditions for weak minimisation of a convex vector program in a Banach space. Our main tool here will be the generalised Jabcobian of Ralph.

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Gallant, André, and Clément Gosselin. "PARAMETRIC TRAJECTORY OPTIMISATION FOR INCREASED PAYLOAD." Transactions of the Canadian Society for Mechanical Engineering 40, no. 2 (2016): 125–37. http://dx.doi.org/10.1139/tcsme-2016-0011.

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The load-carrying capacity of manipulators is often considered to be the same throughout their workspace. However, the actual capacity of manipulators largely depends on their posture, their velocity, their acceleration and the limits of their actuators. In this paper, a method is proposed to increase the payload capacity of manipulators through trajectory optimisation. This optimisation is performed on a task basis and therefore, the load-carrying capacity varies from task to task. An extensive analysis of the method is conducted based on its application on a planar RR serial two degree-of-fr

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Rodriguez, P., S. K. Ray, and A. K. Bhaduri. "Optimisation of post-weld heat treatment — A simple, practical method." Sadhana 28, no. 3-4 (2003): 409–30. http://dx.doi.org/10.1007/bf02706441.

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Lindh, Per, and Polina Lemenkova. "Utilising Pareto efficiency and RSM to adjust binder content in clay stabilisation for Yttre Ringvägen, Malmö." Acta Polytechnica 63, no. 2 (2023): 140–57. https://doi.org/10.5281/zenodo.7886577.

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In this paper, we present a new framework for improving soil strength using an advanced method of engineering statistics. The materials included clay till collected in Yttre Ringvägen, southern Sweden. Binders included quicklime, slag and ordinary Portland cement used as pure binders and blended mixtures. We first applied the Response Surface Methodology techniques aimed at binder blend optimisation: 1) Central Composite Design; 2) Box-Behnken Design; 3) Simplex Lattice Design. The Pareto charts were presented for modelling responses from tests with different binders and estimating their

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Zhdanov, Valery, Elena Logacheva, Viktor Yarosh, and Alexander Ivashina. "Optimisation of repair and maintenance costs for electrical equipment in agricultural enterprises." BIO Web of Conferences 37 (2021): 00103. http://dx.doi.org/10.1051/bioconf/20213700103.

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Application of mathematical methods of cost optimization for repair and maintenance of electrical equipment of agro-industrial enterprises is one of the important and promising directions for increasing the efficiency of electrical equipment operation management in agriculture. Mathematical programming systems use graphical and related attributive information in solving optimization problems. As graphical information in these systems we used maps, plans, diagrams, schedules of preventive measures from which the list of equipment for certain types of repair and maintenance, their labor intensit

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Rahmawati, Tias Eka, Agus Siswanto, and Asmiyenti Djaliasrin Djalil. "Optimization of Fast Disintegrating Tablets Diphenhydramine HCl using Co-process of Cross-link Yellow Kepok Banana Starch, Crospovidone, and Microcrystalline Cellulose." JURNAL ILMU KEFARMASIAN INDONESIA 21, no. 2 (2023): 231. http://dx.doi.org/10.35814/jifi.v21i2.1406.

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Diphenhydramine HCl is an antihistamine drug that is available in conventional tablet form. This study aimed to produce the optimum formula for a diphenhydramine fast disintegrating tablet (FDT) using a modification of starch, crospovidone, and microcrystalline cellulose (MCC) to produce quality tablets that meet the tablet's physical requirements and tablet dissolution. Starch modification was made using a two-step method of starch cross-link, then continued with silica coprecipitation. FDT was prepared by the direct compression method. Optimisation with the simplex lattice design (SLD) model

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Burn, Kevin, and Chris Cox. "A hands-on approach to teaching system identification using first-order plus dead time modelling of step response data." International Journal of Electrical Engineering & Education 57, no. 1 (2018): 24–40. http://dx.doi.org/10.1177/0020720918813825.

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This paper describes three step response-based system identification methods of increasing complexity, together with a range of exercises that will enhance student understanding of this area in an engaging and practical way. For illustration purposes and practicality, it is assumed that the model to be identified is of the first-order plus dead time type. The first method uses a popular graphical technique, which is easy to understand and apply, but inaccurate when the response data are not ideal. The second uses the Nelder–Mead simplex method, which is a more powerful technique and has the ad

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Zhang, Xuan, Bin Liu, Hongru Wang, Wen Ma, and Yan Han. "Multispectral Thermometry Method Based on Optimisation Ideas." Sensors 24, no. 7 (2024): 2025. http://dx.doi.org/10.3390/s24072025.

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Multispectral thermometry is based on the law of blackbody radiation and is widely used in engineering practice today. Temperature values can be inferred from radiation intensity and multiple sets of wavelengths. Multispectral thermometry eliminates the requirements for single-spectral and spectral similarity, which are associated with two-colour thermometry. In the process of multispectral temperature inversion, the solution of spectral emissivity and multispectral data processing can be seen as the keys to accurate thermometry. At present, spectral emissivity is most commonly estimated using

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Dahl, Nicolai J., Pere L. Muntal, and Michael A. E. Andersen. "Systematic Design of a Pseudodifferential VCO Using Monomial Fitting." Elektronika ir Elektrotechnika 29, no. 5 (2023): 36–43. http://dx.doi.org/10.5755/j02.eie.35279.

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Digital integrated electronics benefits from its higher abstraction level, allowing optimisation methods and automated workflows. However, analogue integrated circuit design is still predominantly done manually, leading to lengthy design cycles. This paper proposes a new systematic design approach for the sizing of analogue integrated circuits to address this issue. The method utilises a surrogate optimisation technique that approximates a simple monomial function based on few simulation results. These monomials are convex and can be optimised using a simple linear optimisation routine, result

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Lenzo, Basilio, and Valerio Rossi. "A Simple Mono-Dimensional Approach for Lap Time Optimisation." Applied Sciences 10, no. 4 (2020): 1498. http://dx.doi.org/10.3390/app10041498.

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Lap time minimisation methods have great relevance in the analysis of race tracks, and in the design and optimisation of race vehicles. Several lap time minimisation approaches have been proposed in the literature, which are computationally demanding because they need to either solve differential equations or to implement a forward–backward integration based on an apex-finding method. This paper proposes an alternative method, based on a mono-dimensional quasi-steady-state numerical approach. The proposed approach uses a simplified vehicle model accounting for combined tyre–road interactions,

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Ruslili, Ruslili. "PERMODELAN FAKTOR PRODUKSI UNTUK OPTIMALISASI KEUNTUNGAN DI UKM HARAPAN NUNGGAL BENGKULU." BAHTERA : Jurnal Pendidikan Bahasa dan Sastra 14, no. 1 (2015): 90–98. http://dx.doi.org/10.21009/bahtera141.10.

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Abstrak Keuntungan yang optimal merupakan tujuan utama dalam setiap usaha. Dengan demikian perusahaan akan dituntut menghasilkan produk-produk secara maksimal dengan penggunaan sumber daya yang dimiliki agar memberikan keuntungan optimal. Perusahaan juga harus memperhatikan setiap perubahan-perubahan yang terjadi, baik dari keuntungan maupun sumber daya yang dimiliki agar tidak mempengaruhi keuntungan optimal perusahaan. Tujuan penelitian ini adalah mengetahui besarnya keuntungan optimal atas penggunaan sumber daya untuk produksi tahu yang dapat diperoleh UKM Harapan Nunggal dengan metod

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Lucas, S. K. "Maximising output from oil reservoirs without water breakthrough." ANZIAM Journal 45, no. 3 (2004): 401–22. http://dx.doi.org/10.1017/s1446181100013456.

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AbstractOften in oil reservoirs a layer of water lies under the layer of oil. The suction pressure due to a distribution of oil wells will cause the oil-water interface to rise up towards the wells. Given a particular distribution of oil wells, we are interested in finding the flow rates of each well that maximise the total flow rate without the interface breaking through to the wells. A method for finding optimal flow rates is developed using the Muskat model to approximate the interface height, and a version of the Nelder-Mead simplex method for optimisation. A variety of results are present

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Truong, Viet Hung. "Discrete optimisation of steel-concrete composite sections in simple girder bridges." Ministry of Science and Technology, Vietnam 64, no. 1 (2022): 38–43. http://dx.doi.org/10.31276/vjst.64(1).38-43.

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In this study, the optimisation design problem of steel-concrete composite sections in simple girder bridges is developed. Design variables including the thickness of the desk and the dimensions of the girder section are discrete variables to reflect the realistic design works. The total cost of the desk and the steel girder is the objective function that is minimised. The design requirements of the geometry, load-carrying capacity, and deformation provided in the TCVN 11823:2017 standard are used as the optimisation constraints. The above discrete optimisation is solved by using the Harmony S

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Sagala, Reynelda Juliani, Pretty Falena Atmanda Kambira, Untung Gunawan, Sondang, and G. O. Ambarita. "Optimisation of lozenge formulation from Citronella (Cymbopogon nardus (L.) Rendle) extract with various binding materials using a simplex lattice design method." Pharmacy Education 23, no. 2 (2023): 194–99. http://dx.doi.org/10.46542/pe.2023.232.194199.

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Background: Antibacterial and antifungal activities of citronella grass extract are widely used, but there is no pleasant dosage form for patients who are unable to swallow. Citronella grass (Cymbopogon nardus (L.) Rendle) extract lozenges were prepared with wet granulation method containing natural or synthetic polymer (PGA/PVP/gelatin) binders. Objective: This study aimed to determine the most optimal lozenge formula using the simplex lattice design method with Design Expert software 13.0.0. Methods: The extract was made using maceration method with 70% ethanol as solvent. Furthermore, the p

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Li, Miqing. "Is Our Archiving Reliable? Multiobjective Archiving Methods on “Simple” Artificial Input Sequences." ACM Transactions on Evolutionary Learning and Optimization 1, no. 3 (2021): 1–19. http://dx.doi.org/10.1145/3465335.

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In evolutionary multiobjective optimisation ( EMO ), archiving is a common component that maintains an (external or internal) set during the search process, typically with a fixed size, in order to provide a good representation of high-quality solutions produced. Such an archive set can be used solely to store the final results shown to the decision maker, but in many cases may participate in the process of producing solutions (e.g., as a solution pool where the parental solutions are selected). Over the last three decades, archiving stands as an important issue in EMO, leading to the emergenc

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W. Lim, J., and S. Sivaguru. "Chassis Structural Design of Track Racing One Manned Formula Car." International Journal of Engineering & Technology 7, no. 3.32 (2018): 71. http://dx.doi.org/10.14419/ijet.v7i3.32.18396.

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The current work contains the design and optimisation of a spaceframe chassis for a track racing one manned formula car able to participate in the Formula Society of Automotive Engineers (Formula SAE) 2017/2018. Materials, profile cross section types were selected by considering the theories of elastic failure. The structural strength of the chassis was determined by Finite Element Analysis using ABAQUS software by determining the stress distribution during static and dynamic loading in addition to exposing the modal frequencies. Beam elements were used in the finite element model as it provid

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Vasista, S., and L. Tong. "Topology optimisation via the moving iso-surface threshold method: implementation and application." Aeronautical Journal 118, no. 1201 (2014): 315–42. http://dx.doi.org/10.1017/s0001924000009143.

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AbstractTopology optimisation is a useful tool for the design of aircraft structures. This work details how the new moving iso-surface threshold (MIST) topology optimisation method works and how it can be applied to aircraft structural design. This method has been coupled with commercial finite element analysis software in a simple manner without requiring the modification of the commercial software source code. In this way the user is able to take advantage of the finite element analysis tools such as automatic mesh generation and efficient solving. The extension of the method to 3D designs i

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Kulfan, B. M. "Recent extensions and applications of the ‘CST’ universal parametric geometry representation method." Aeronautical Journal 114, no. 1153 (2010): 157–76. http://dx.doi.org/10.1017/s0001924000003614.

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Abstract For aerodynamic design optimisation as well as for multidisciplinary design optimisation studies, it is very desirable to limit the number of the geometric design variables. In Ref. 1, a ‘fundamental’ parametric aerofoil geometry representation method was presented. The method included the introduction of a geometric ‘class function/shape function’ transformation technique, CST, such that round nose/sharp aft end geometries as well as other classes of geometries could be represented exactly by analytic well behaved and simple mathematical functions having easily observed physical feat

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Bratek, P., and A. Kos. "Optimisation of Temperature Fields of Microsystems with Self-Organising Neural Nets." Active and Passive Electronic Components 26, no. 3 (2003): 141–49. http://dx.doi.org/10.1080/1042015031000073850.

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Thermal modelling and optimisation of parameter distributed systems is a rather time-consuming process. In this paper the problem of optimisation of temperature fields of VLSI circuits and systems is attacked by a selforganising neural net. The net directly solves the task generated by a heuristic algorithm. No physical model of thermal phenomena is used. The proposed method is simple. Some examples and statistical results are presented. The proposed method is addressed mostly to large, high-speed system designs.

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Vlad, Andrei I., Alexei A. Romanyukha, and Tatiana E. Sannikova. "Parameter Tuning of Agent-Based Models: Metaheuristic Algorithms." Mathematics 12, no. 14 (2024): 2208. http://dx.doi.org/10.3390/math12142208.

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When it comes to modelling complex systems using an agent-based approach, there is a problem of choosing the appropriate parameter optimisation technique. This problem is further aggravated by the fact that the parameter space in complex agent-based systems can have a large dimension, and the time required to perform numerical experiments can be large. An alternative approach to traditional optimisation methods are the so-called metaheuristic algorithms, which provide an approximate solution in an acceptable time. The purpose of this study is to compare various metaheuristic algorithms for par

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Jankovic, Dragan, Radomir Stankovic, and Claudio Moraga. "Arithmetic expressions optimisation using dual polarity property." Serbian Journal of Electrical Engineering 1, no. 1 (2003): 71–80. http://dx.doi.org/10.2298/sjee0301071j.

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A method for optimisation of fixed polarity arithmetic expressions (FPAEs) based on dual polarity is proposed. The method exploits a simple relationship between two FPAEs for dual polarities. It starts from the zero polarity FPAE of the given function and calculates all FPAEs using the dual polarity route. Using one-bit check carries out conversion from one FPAE to another. Each term in an FPAE is processed by the proposed processing rule. Terms, which differ in a single position, can be substituted by a high order term (cube). Experimental results show efficiency of proposed method.

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Vaidogas, E. R. "ON RELIABILITY-BASED STRUCTURAL OPTIMISATION USING STOCHASTIC QUASIGRADIENT METHODS/ZUR ZUVERLÄSSIGKEITSTHEORETISCH GESTÜTZTEN TRAGWERKS-OPTIMIERUNG MIT VERFAHREN DER STOCHASTISCHEN QUASIGRA-DIENTEN." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 1, no. 2 (1995): 43–64. http://dx.doi.org/10.3846/13921525.1995.10531512.

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Methodical aspects of the reliability-based structural optimisation using stochastic quasigradient methods are considered. For an example of the simply supported reinforced concrete beam, the employment of the Lagrange multiplier method that belongs to the class of stochastic quasigradient methods is demonstrated. The classical optimum design goal to minimise structural cost or weight under the constraint on the structural failure probability is taken for consideration. Optimisation problems solved with the Lagrangemultiplier method are formulated in form of general stochastic programming prob

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Popova, Angela, Jovica Vuletić, Jordančo Angelov, and Mirko Todorovski. "OPTIMAL DISPERSED GENERATION PLACEMENT IN RADIAL DISTRIBUTION SYSTEMS USING A PATTERN OF LOAD FLOW PROCEDURE – CLUSTERING OPTIMISATION." Journal of Energy Technology 16, no. 2 (2025): 23–46. https://doi.org/10.18690/jet.16.2.23-46.2023.

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Nowadays, distributed generation plays a vital role in distribution systems. It makes an indisputable contribution towards power loss minimisation and voltage profile improvement. To maximise the benefits of distributed generators, their location and size is of crucial importance. This paper describes the use of clustering optimisation (CO) as a highly effective method for determining the optimal placement and sizing of distributed generators. Assessment of the effectiveness from the clustering optimisation method is achieved by its demonstration on a 69-bus and 119-bus distribution systems. F

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SKORUPKA, Dariusz, Artur DUCHACZEK, and Artur SZLESZYŃSKI. "OPTIMISATION OF SELECTING TRANSPORT MEANS IN BUILDING MATERIALS DEPOT LOGISTICS." Scientific Journal of the Military University of Land Forces 166, no. 4 (2012): 137–45. http://dx.doi.org/10.5604/01.3001.0002.3539.

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The Bellinger’s method presented in the paper is an example of how to use it in depot logistics. The authors focus their considerations on the selection of a forklift which could be used for carrying construction materials collected in a depot. The paper describes a basic assumption of the Bellinger’s technique and then evaluates its advantages and disadvantages. The results of the calculations made with the Bellinger’s method, for example, are compared with the calculations made with the Electre III method. Both of those multi-criteria decision support methods produce a ranking of decision va

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