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Journal articles on the topic 'Nite element method'

Author: Grafiati

Published: 6 September 2023

Last updated: 31 July 2025

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1

Wang, Yuqing. "Node Adaptive Finite Element Method Based on Hodge Decomposition for 2D Maxwells Equation." Theoretical and Natural Science 86, no. 1 (2025): 139–44. https://doi.org/10.54254/2753-8818/2025.20195.

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The ecient numerical method of Maxwells equation needs to satisfy the interface condition of electromagnetic eld, so the nite element method of the electromagnetic eld problem generally uses the edge nite element space. Compared with the traditional nodal element, the disadvantage of the edge element is that it has many degrees of freedom and the condition number of the linear system is poor. In this paper, a method based on Hodge decomposition is used to convert Maxwells equation into a standard elliptic boundary value problem, then use node element to solve the ellipse problem and then get t

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2

Öchsner, Andreas. "On some Conceptual Considerations for the Finite Element Simulation of the Oxygen Out-Diffusion in Ag-MgO Composites." Defect and Diffusion Forum 283-286 (March 2009): 1–5. http://dx.doi.org/10.4028/www.scientific.net/ddf.283-286.1.

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The presence of atomic oxygen at internal metal-ceramic oxide interfaces signi¯- cantly affects the physical properties of the interfaces which in turn affects the bulk properties of the material. The application of numerical tools such as the ¯nite element method requires some conceptional considerations if results from different finite element meshes of methods should be comparable. This paper summarises some of these thoughts in order to provide the right basis for comparative investigations.

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3

PROKOPOVICH, Anatoly A., and Yana A. BUZOVSKAYA. "MODELING OF STRESS-DEFORMED STATE OF BENDED REINFORCED CONCRETE ELEMENTS IN ZONES OF CLEAN AND TRANSVERSE BEND." Urban construction and architecture 11, no. 1 (2021): 26–33. http://dx.doi.org/10.17673/vestnik.2021.01.3.

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The article deals with the analysis of the stress-strain state (SSS) of a bent reinforced concrete element in zones of pure and transverse bending. It is assumed that a bent element in the process of loading (after the formation of normal and oblique cracks) is divided into blocks, united by uncracked concrete and reinforcement that has adhesion to concrete. SSS was formed using the results of experimental studies of special prototypes in the PC “Lira-SAPR”. A fi nite element model of a prototype has been developed in the form of a reinforced concrete rectangular beam loaded with two identical

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4

Dyachenko, Denis Yu, and Svetlana V. Dyachenko. "Finite element method in computer simulation for improved patient care in dentistry: A systematic review." Kuban Scientific Medical Bulletin 28, no. 5 (2021): 98–116. http://dx.doi.org/10.25207/1608-6228-2021-28-5-98-116.

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Background. The fi nite element method is gaining acknowledgment in Russia and other developed countries in a range of areas, including medicine. In stomatology, the method is applicable in research and implication of novel treatment and relevant material design.Objective. The review highlights usage of the fi nite element method in computer simulation to improve quality of patient dental care.Methods. The review analyses the state-of-the-art in current scientific literature. Records were mined in the PubMed and e-Library databases at a depth of 10 years, with selective inclusion of earlier ar

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5

Das, S., M. F. Abbod, Q. Zhu, et al. "A Hybrid Modelling Approach Applied to the Evolution of Microstructure during Plane Strain Deformation." Materials Science Forum 715-716 (April 2012): 416–26. http://dx.doi.org/10.4028/www.scientific.net/msf.715-716.416.

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This paper presents a modelling strategy that combines neuro-fuzzy methods to dene the material model with cellular automata representations of the microstructure, all embedded within a nite element solver that can deal with the large deformations of metal processing technology. We use the acronymnf-CAFE as a label for the method. The need for such an approach arises from the twin demands of computational speed for quick solutions for ecient material characterisation by incorporating metallurgical knowledge for material design models and subsequent process control. In this strategy, the cellul

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6

Manchorova-Veleva, Neshka А. "Three-dimensional analysis of cavity wall deformation after composite restoration of masticatory teeth." Folia Medica 53, no. 4 (2011): 53–59. http://dx.doi.org/10.2478/v10153-011-0068-8.

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ABSTRACT AIM: The aim of the present work was to study the size of cavity wall deformation in eight class I and II defects after composite restoration. MATERIALS AND METHODS: 1. Creating a geometric model - data on the size of the left maxillary second premolar were obtained from a routine craniofacial scanning of a 20-yearold patient with a 2,5 Dental CT scanner (General Electric), with high resolution and 0.625mm-thin slices. The contour of each of the 33 cross-sections of tooth 25 was delineated using graphics software (CorelDraw 7.0) and transferred to a specialized product for engineering

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7

Drebotiy, Roman, and Heorhiy Shynkarenko. "Modified heuristic criterion for parameter choice for one stabilization scheme of the finite element method." Journal of Applied and Numerical Analysis 2 (December 16, 2024): 41–55. https://doi.org/10.30970/ana.2024.2.41.

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We consider a modi cation to a heuristic criterion for the optimal choice of the stabilization parameter in a certain nite element scheme for the singularly perturbed di usion-advectionreaction problem. This criterion is based on a minimization problem of the function of the stabilization parameter and the corresponding algorithm for nding the minimum. The function generally exhibits two extremum points: a local minimum and a local maximum. This forces the algorithm to repeatedly use an additional controlled heuristic "try-and-check" procedure, which can be ine cient in some cases. In this art

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8

Zhou, Jing, Bao Yu Wang, Lei Fu, and Qing Lei Meng. "A Method to Optimize Aluminum Alloy Door Impact Beam Stamping Process Using NSGA-II." Materials Science Forum 773-774 (November 2013): 89–94. http://dx.doi.org/10.4028/www.scientific.net/msf.773-774.89.

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The process parameters of aluminium alloy hot stamping produce an importantly effect on production forming quality. In the case of a door impact beam inside the car doors, the fi-nite-element model of aluminium alloy hot stamping is set up. Based on the model, the forming quality is investigated under usual process condition. Using the Latin hypercube method, we sampled the data points from design space of process parameters. Data points are imported into finite-element model to calculate the forming quality indices. According to their responding values, the quadratic response surfaces between

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9

Djaghout, Manal, Aberrazak Chaoui, and Khaled Zennir. "Full discretization to an hyperbolic equation with nonlocal coefficient." Boletim da Sociedade Paranaense de Matemática 40 (January 23, 2022): 1–14. http://dx.doi.org/10.5269/bspm.46032.

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We present full discretization of the telegraph equation with nonlocal coeffecient using Rothe-nite element method. For solving the equation numerically we use the Newton Raphson method, but the nonlocal term causes diffeculties because the Jacobien matrix is full. To remedy these diffeculties we apply the technique used by Sudhakar [4]. The optimal a priori error estimates for both semi discrete and fully discrete schemes are derived in V and H1 and a numerical experiment is described to support our theoretical result.

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10

Kovalev, Alexei A., and Dmitry S. Panych. "Modeling of thermal processes in a contact wire by the fi nite element method using Comsol Multiphysics 5.2 software package." Innotrans, no. 3 (2017): 49–52. http://dx.doi.org/10.20291/2311-164x-2017-3-49-52.

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11

Izudin Kapetanović, Nermin Sarajlić, Majda Tešanović, and Mensur Kasumović. "NUMERICAL SOLUTION FOR THE DISTRIBUTION OF THE ELECTROMAGNETIC AND THERMAL FIELDS OF AN AIR-CORE TRANSFORMER." Journal of Energy - Energija 57, no. 4 (2022): 424–39. http://dx.doi.org/10.37798/2008574331.

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The article presents a numerical solution for the distribution of the electromagnetic and thermal fi elds of an air-core transformer using the fi nite element method. The distribution of the magnetic fi eld is determined for the dynamic steady state and magnetic nonlinear core characteristics. The model presented facilitates the establishment of criteria for optimizing transformer operation under various load conditions, environments as well as in the case of failures. Thus, the transformer can operate at maximum capacity while, at the same time, the probability of faults due to overheating is

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12

Gong, Dian Xuan, and Feng Gong Lang. "On the Dimension of Bivariate C¹ Cubic Spline Space with Homogeneous Boundary Conditions over a CT Triangulation." Applied Mechanics and Materials 50-51 (February 2011): 488–92. http://dx.doi.org/10.4028/www.scientific.net/amm.50-51.488.

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A bivariate spline is a piecewise polynomial with some smoothness de ned on a parti- tion. In this paper, we mainly study the dimensions of bivariate C1 cubic spline spaces S1;0 3 (CT ) and S1;1 3 (CT ) with homogeneous boundary conditions over CT by using interpolating technique, where CT stands for a CT triangulation. The dimensions are related with the numbers of the inter vertices and the singular boundary vertices. The results of this paper can be applied in many elds such as the nite element method for partial di erential equation, computer aided design, numerical approximation, and so o

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13

Ahmadzadeh, Asadallah, and Ahmad Teimouri. "Comparison of stress distribution around implants with three different attachments in overdenture supported by four maxillary implants using fi nite element analysis method." Bioscience Biotechnology Research Communications 10, no. 3 (2017): 455–62. http://dx.doi.org/10.21786/bbrc/10.3/19.

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14

Phuangmalai, Winna, Mongkol Konghirun, and Nattapon Chayopitak. "A Design Study of 4/2 Switched Reluctance Motor Using Particle Swarm Optimization." ECTI Transactions on Electrical Engineering, Electronics, and Communications 11, no. 1 (2013): 56–62. http://dx.doi.org/10.37936/ecti-eec.2013111.170597.

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This paper presents the use of particle swarm optimization (PSO) algorithm applied to the optimal design of the 4/2 switched reluctance motor (SRM). The main advantage of designing 4/2 SRM is the robust rotor structure for high speed unidirectional rotating applications such as the air conditioner's blower. In the designing process, the nite element method magnetics (FEMM) is employed to analyze the designing SRM with its optimized parameters given by PSO. This PSO algorithm is ecient and exible. The objective function is based on the ripple torque minimization with respect to rotor node posit

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15

Lytvynenko, L., S. Pogarsky, and D. Mayboroda. "Analysis and Optimization of the Operating Range of a Monopole Antenna Involving ‘Meander’ Type Slot In- homogeneities." RADIO PHYSICS AND RADIO ASTRONOMY 27, no. 2 (2022): 083–92. http://dx.doi.org/10.15407/rpra27.02.083.

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Subject and Purpose. The paper presents results of numerical modeling and experimental studies of a disk-shaped microstrip antenna involving ‘meander’ type slotted inhomogeneities. The work has been aimed at optimizing the operating range of the antenna and matching it to external circuits through the use of additional structural elements and appropriate feeding techniques. Methods and Methodology. The design features a circular disk-shaped microstrip resonator containing within its plane groups of slotted inhomogeneities which form a segmented meander line, with the segments oriented relative

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16

Kiselev, I. G., D. N. Kurilkin, and M. A. Shreiber. "Thermal model of an asynchronous traction motor of a diesel locomotive." Proceedings of Petersburg Transport University 2021, no. 4 (2021): 460–68. http://dx.doi.org/10.20295/1815-588x-2021-4-460-468.

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Objective: Evaluation of the temperature regime of the windings of an asynchronous traction electric motor with a squirrel-cage rotor (ATED) of the DAT-350 type of a 2TE25A diesel locomotive using the de- Современные технологии – транспорту 467 ISSN 1815-588Х. Известия ПГУПС 2021/4 veloped thermal model. Methods: The research was carried out by the fi nite element method in the application for calculating steady-state temperature fi elds SolidWorks. Resuls: To ensure the specifi ed service life of the ATED, the temperature rise of the windings must be limited to safe values, based on the insul

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17

MOZGOLOV, Mikhail V., and Arina V. TURANOVA. "ON THE EFFECTIVENESS OF OBLIQUE CAISSON REINFORCED CONCRETE FLOORS." Urban construction and architecture 11, no. 3 (2021): 20–25. http://dx.doi.org/10.17673/vestnik.2021.03.03.

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The distribution of forces in the beams of a straight and oblique monolithic reinforced concrete caisson fl oor of a square plan is compared. The forces in the beams are determined by well-known analytical methods and using fi nite element models of the SCAD PC. The calculations showed that the forces in the beams of the oblique caisson fl oor, determined analytically and using computer models, diff er signifi cantly, which indicates the complex operation of the spatial system, which is not taken into account by the analytical calculation method based on the theory of calculating plates suppor

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18

PANFILOV, Denis A., Vladimir Yu CHEGLINTSEV, Vyacheslav V. ROMANCHIKOV, and Yury V. ZHILTSOV. "STUDIES OF DEFLECTIONS OF STATICALLY DETERMINED REINFORCED CONCRETE BEAMS BASED ON A NONLINEAR DEFORMATION MODEL." Urban construction and architecture 7, no. 4 (2017): 9–13. http://dx.doi.org/10.17673/vestnik.2017.04.2.

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In this paper theoretical studies of statically determinated bending reinforced concrete beams of rectangular cross-section on deformation indexes under the eff ect of a short-time uniformly distributed load are viewed. These theoretical studies are based on the main points of the nonlinear deformation model that takes into account the nonlinear work of concrete and fi tments taking into account discrete cracking. The results of calculating the deformation of beams by the method of SP 63.13330.2012 and by authors’ method are proposed as well as the results of a numerical experiment with the id

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19

Denkena, B., B. Bergmann, K. Kono, R. Ishiguro, and H. Klemme. "CHARACTERIZATION OF HEAT CONDUCTIVITY OF ECCENTRICALLY ROTATING HEAT PIPES USED FOR COOLING OF MOTOR SPINDLES." MM Science Journal 2021, no. 3 (2021): 4698–705. http://dx.doi.org/10.17973/mmsj.2021_7_2021078.

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Heat losses within motor spindles lead to undesired effects such as machining inaccuracies and de-creasing lifetime of the motor and bearings. To reduce thermal loads, complex shaft cooling concepts with costly sealing techniques exist. For this reason, a novel, less costly cooling concept has been de-veloped based on heat pipes with high thermal conductivity and fin-shaped heat exchangers. The de-sign and integration of these heat exchanger elements into a motor spindle is carried out using the fi-nite element method. The aim is to optimize the efficiency of the heat pipes and heat exchangers

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20

Malecot, Pierrick Malecot, Gemala Hapsari, Sebastien Thibaud, and Fabrice Richard. "A new way to identify thin sheet behaviour: Micro-InDef." International Journal of Quantitative Research and Modeling 1, no. 2 (2020): 59–66. http://dx.doi.org/10.46336/ijqrm.v1i2.33.

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Incremental forming is a rapid prototyping process which uses a forming tool toform a sheet metal according to a predetermined trajectory. In this work, a micro incremental deformation test (Micro InDef test) derived from the principle of single point incremental sheet forming is developed and proposed. A complex mechanical loading is applied and has a strong potential for the identication of inelastic behavior using inverse method. In the rst part, this work addresses the parameters identication and validation procedures of ductile damage behavior of ultra-thin sheet metal under very large st

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21

Буялич, Г. Д., Г. С. Жетесова, Ж. Т. Акижанова та К. М. Бейсембаев. "Жұмыс істеп тұрған кезде конвейердің камераға бұрылуын зерттеу". Горный журнал Казахстана, № 10(222) (6 листопада 2023): 8–12. http://dx.doi.org/10.48498/minmag.2023.222.10.009.

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Исследовано движение скребкового конвейера из штрека в камеру с одновременным транспортированием груза и поворотом става на 90 градусов. С применением методов дискретизации уравнений динамики в компьютерных моделях определены нагрузки шарнирной системы и опасные состояния става конвейера. Рассмотрены методы его безопасной эксплуатации. Для расчета устойчивости кровли в камере и основном штреке, с учетом действия крепи, методом конечных элементов (МКЭ) создана программа расчета напряжений. Рассмотрена методика расчета времени цикла поворота забоя на 180 градусов. Сокращение затрат на разработку

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22

Kohno, Haruhiko. "An efficient, high-order finite element method using the nodal averaging technique for incompressible fluid flows." Computer Physics Communications 195 (March 15, 2019): 68–76. https://doi.org/10.5281/zenodo.2594035.

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A new finite element method is presented for use of quadrilateral nine-node elements in the solution of the incompressible Navier–Stokes equations. In a conventional predictor–corrector scheme, the method applies the nodal averaging technique to discretize the Poisson equation used for the simultaneous relaxation of velocity and pressure. Additionally, efficient approximation procedures are devised to increase the speed of computation without deteriorating solution accuracy. The proposed numerical schemes are evaluated on two-dimensional test problems including a classical lid-driv

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23

Tayyebi, K., A. M. Haghighi, and R. Attarnejad. "A new nine-node element for analysing plates with varying thickness using basic displacement functions." Journal of Mechanical Engineering and Sciences 12, no. 4 (2018): 4056–71. http://dx.doi.org/10.15282/jmes.12.4.2018.06.0352.

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The capability of the Finite Element Method in producing accurate and efficient results largely depends on the shape functions adopted to frame the displacement field inside the element. In this paper, a new nine-node Lagrangian element was developed to analyse thin plates with varying cross-sections using the shape functions obtained for non-prismatic straight beams with minimum number of elements. The formulated shape functions, which represent vertical displacements and rotations throughout elements, are rooted from a purely mechanical functions called Basic Displacement Functions (BDFs). T

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24

BEZIK, DMITRY A. "TESTING THE HYPOTHESIS OF THE COSINE DISTRIBUTION OF STRESSES IN THE SHAFT-HOLE CONTACT." Agricultural engineering, no. 5 (2021): 42–47. http://dx.doi.org/10.26897/2687-1149-2021-5-42-47.

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One of the most common connection types in mechanical engineering and construction is the shaft-hole connection. The mechanical stresses caused by its loading are distributed in the contact zone of the loaded parts of the joint. In some cases, they can lead to destruction. Therefore, while designing, it is important to analyze the mechanical stresses in the contact zone. Traditionally, calculations assume that the contact stresses are distributed according to the cosine law. However, this is not entirely true, especially with diff erent shaft and hole diameters. The authors examined theoretica

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25

Матаев, А. К., А. Ж. Имашев, Б. Хусан та Н. К. Шайке. "Жер асты құрылымдарының кернеулі күйін модельдеу негізінде тау кен қазбаларын бекітудің оңтайлы түрін таңдау". Горный журнал Казахстана, № 1(225) (5 лютого 2024): 25–32. http://dx.doi.org/10.48498/minmag.2024.225.1.001.

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Статья посвящена исследованию прогноза формирования вторичного напряженно-деформированного состояния (НДС) в массиве горных пород в границах влияния очистных работ на Хромтауском месторождении. Численное моделирование напряженно-деформационного состояния массива горных пород и расчет несущей способности видов крепи, применяемых на шахте, выполнено в программе RS2, которая работает на основе метода конечных элементов в двумерной постановке, который дает возможность учесть значительное количество факторов, влияющих на состояние горного массива. Данные, полученные в программе RS2, более близки к

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26

Tan, Shujun, Qingwei Wang, Zhigang Wu, Yunfei Yang, and Ziwen Yu. "A method for deriving a non-singular state-space formulation based on Rubin's model for Pogo analysis." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, no. 8 (2018): 2717–30. http://dx.doi.org/10.1177/0954410018776811.

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A method for deriving a non-singular state-space formulation based on Rubin's model for Pogo analysis is presented in this study. Because of the non-singularity, the state-space model can be directly used in frequency-domain analyses and time-domain simulations. To describe the assembly method concisely, the dynamic equations of the nine types of independent elements are described in a standard manner. The nine types of elements are divided into two classes according to characteristics of the dynamic equations. The mapping relationship between the local and global numbers of elements and nodes

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27

WU, HaiJun. "Continuous interior penalty nite element methods for Helmholtz equation with high wave number." SCIENTIA SINICA Mathematica 42, no. 5 (2012): 429–44. http://dx.doi.org/10.1360/012012-15.

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Noon, Najat Jalil. "Numerical Analysis of Least-Squares Group Finite Element Method for Coupled Burgers' Problem." Baghdad Science Journal 18, no. 4(Suppl.) (2021): 1521. http://dx.doi.org/10.21123/bsj.2021.18.4(suppl.).1521.

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In this paper, a least squares group finite element method for solving coupled Burgers' problem in 2-D is presented. A fully discrete formulation of least squares finite element method is analyzed, the backward-Euler scheme for the time variable is considered, the discretization with respect to space variable is applied as biquadratic quadrangular elements with nine nodes for each element. The continuity, ellipticity, stability condition and error estimate of least squares group finite element method are proved. The theoretical results show that the error estimate of this method is . The numer

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29

Silva, J. B. C., S. S. Mansur, and R. C. Lima. "LARGE EDDY SIMULATION OF TURBULENT INCOMPRESSIBLE FLUID FLOWS BY A NINE-NODES CONTROL VOLUME-FINITE ELEMENT METHOD." Revista de Engenharia Térmica 4, no. 2 (2005): 173. http://dx.doi.org/10.5380/reterm.v4i2.5412.

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The main purpose of this work is the numerical computation of turbulent incompressible fluid flows by a nine-node control volume finite element method (CVFEM) using the methodology of large-eddy simulation.. The domain is discretized using nine nodes finite elements and the equations are integrated into control volumes around the nodes of the finite elements. The Navier?Stokes equations are filtered for simulation of the large scales variables and the sub-grid scales stress appearing due to the filtering process are modeled through the eddy viscosity model of Smagorinsky. The two-dimensional b

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30

Liu, Wang Sheng, Ya An Li, Lin Cui, and Ming Huan Wang. "The Mutual Impedance Analysis of a Broadband Dense Plane Array." Advanced Materials Research 443-444 (January 2012): 1019–25. http://dx.doi.org/10.4028/www.scientific.net/amr.443-444.1019.

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Due to the mutual radiation impedance may influence acoustics performance of a broadband dense plane array seriously, the expression of mutual radiation impedance among the transducers is developed according to the definition of mutual radiation impedance based on BEM（Boundary Element Method）. BEM model is established for acoustic radiation of a broadband dense plane array with nine elements. Sound pressure distribution of the nine-element array is solved using SYSNOISE software. And mutual radiation impedances are calculated on the condition of knowing surface normal velocity. Acoustic perfor

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31

Kosior, Grzegorz, Marina Frontasyeva, Zbigniew Ziembik, Inga Zincovscaia, Agnieszka Dołhańczuk-Śródka, and Barbara Godzik. "The Moss Biomonitoring Method and Neutron Activation Analysis in Assessing Pollution by Trace Elements in Selected Polish National Parks." Archives of Environmental Contamination and Toxicology 79, no. 3 (2020): 310–20. http://dx.doi.org/10.1007/s00244-020-00755-6.

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Abstract The concentrations of trace elements in feather moss Pleurozium schreberi (Brid.) Mitt. were used to indicate the relative levels of air pollution by trace elements in Polish national parks. Pleurozium schreberi was collected from nine national parks. The highest concentrations were recorded in the moss samples from the southern and most industrialised part of the country; the lowest from northern and north-eastern Poland. A comparison of data obtained from Polish national parks in the 1970s and 1990s showed a significant decrease in the concentrations of heavy metals. In the linear c

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32

Ramalho, L. D. C., J. Belinha, and R. D. S. G. Campilho. "A New Crack Propagation Algorithm Combined with the Finite Element Method." Journal of Mechanics 36, no. 4 (2020): 405–22. http://dx.doi.org/10.1017/jmech.2020.1.

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ABSTRACTThe prediction of crack propagation is an important engineering problem. In this work, combined with triangular plane stress finite elements, a new remeshing algorithm for crack opening problems was developed. The proposed algorithm extends the crack iteratively until a threshold maximum crack length is achieved. The crack propagation direction is calculated using the maximum tangential stress criterion. In this calculation, in order to smoothen the stress field in the vicinity of the crack tip, a weighted average of the stresses of the integration points around the crack tip is consid

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33

Akpobi, John A., and E. D. Akpobi. "Development of a Model for Analysing Radial Flow of Slightly Compressible Fluids." Advanced Materials Research 62-64 (February 2009): 629–36. http://dx.doi.org/10.4028/www.scientific.net/amr.62-64.629.

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In this work, we develop a finite element-finite difference method to solve the differential equation governing the radial flow of slightly compressible fluids. The finite element method is used to carry out spatial approximations so as to study the variation of fluid properties at the various nodes to which effect we divided the entire radial domain of the fluid into a mesh of four radial 1-D quadratic elements which exposes nine nodes to intense study. Time approximation is done with the aid of the Crank-Nicolson finite difference scheme.

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34

Cho, Maenghyo, and Jun-Sik Kim. "A postprocess method for laminated shells with a doubly curved nine-noded finite element." Composites Part B: Engineering 31, no. 1 (2000): 65–74. http://dx.doi.org/10.1016/s1359-8368(99)00059-1.

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Cheung, Y. K., and Chen Wanji. "Refined nine-parameter triangular thin plate bending element by using refined direct stiffness method." International Journal for Numerical Methods in Engineering 38, no. 2 (1995): 283–98. http://dx.doi.org/10.1002/nme.1620380208.

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Lou, Yun-xiao, Xian-shu Fu, Xiao-ping Yu, Zi-hong Ye, Hai-feng Cui, and Ya-fen Zhang. "Stable Isotope Ratio and Elemental Profile Combined with Support Vector Machine for Provenance Discrimination of Oolong Tea (Wuyi-Rock Tea)." Journal of Analytical Methods in Chemistry 2017 (2017): 1–8. http://dx.doi.org/10.1155/2017/5454231.

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This paper focused on an effective method to discriminate the geographical origin of Wuyi-Rock tea by the stable isotope ratio (SIR) and metallic element profiling (MEP) combined with support vector machine (SVM) analysis. Wuyi-Rock tea (n=99) collected from nine producing areas and non-Wuyi-Rock tea (n=33) from eleven nonproducing areas were analysed for SIR and MEP by established methods. The SVM model based on coupled data produced the best prediction accuracy (0.9773). This prediction shows that instrumental methods combined with a classification model can provide an effective and stable t

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Ölmez, Hasan, and Ertekin Bayraktarkatal. "Maximum Load Carrying Capacity Estimation of The Ship and Offshore Structures by Progressive Collapse Approach." Polish Maritime Research 23, no. 3 (2016): 28–38. http://dx.doi.org/10.1515/pomr-2016-0029.

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Abstract The aim of the paper is to represent step by step progressive collapse analysis for maximum load carrying capacity estimation of a hull girder by using variant of Smith Method, named HULT by authors, with different element separation including single plates, stiffeners, hard corners and stiffened panels. The structural elements that form the ships and offshore structures are exposed to large vertical bending moments and especially compression or tension forces in the longitudinal axis in case of hogging and sagging under bad sea conditions. In recent years, it becomes very important a

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Pan, Hui, Wei Zhou, Dezhong Chen, Hongling Zhang, and Yunchun Han. "Gas coal delamination recognition method based on the Fisher discriminant function of trace element characteristics." Journal of Geophysics and Engineering 19, no. 6 (2022): 1235–45. http://dx.doi.org/10.1093/jge/gxac081.

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Abstract Numerous geological factors will affect determining the well bottom position by well depth during the construction of coalbed methane wells, resulting in inaccurate results. By using the trace element characteristics of coal samples to determine the source layer of coal samples, it is possible to avoid making incorrect assumptions. The groove method was used in this study to collect 40 gas coal samples from seven gas coal seams in Dingji Mine, which were then sealed and stored. The contents of 40 different trace elements were analyzed in the samples, and the types and content characte

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Andriievskyi, Viktor, Ivan Martyniuk, and Oleksandr Maksymiuk. "STUDY OF THE CONVERGENCE OF POLYNOMIALS AND THE FINITE ELEMENT METHOD TAKING INTO ACCOUNT THE PLASTIC PROPERTIES OF THE MATERIAL." Collection of Scientific Works of the Ukrainian State University of Railway Transport, no. 207 (March 22, 2024): 24–38. http://dx.doi.org/10.18664/1994-7852.207.2024.301881.

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One of the challenges associated with the development of numerical methods for structural analysis based on the finite element method is justifying the reliability of the obtained results and comparing the effectiveness of new approaches with existing ones. Theoretically, this is often difficult to accomplish, even for specific cases. Therefore, to address these issues, numerical experiment data obtained on benchmark problems are usually employed. This article explores a class of objects representable by a prismatic finite element with a cross-section of arbitrary shape. For this prismatic fin

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Bermudez, J., A. Illarramendi, and I. Berges. "Binding SNOMED CT Terms to Archetype Elements." Methods of Information in Medicine 54, no. 01 (2015): 45–49. http://dx.doi.org/10.3414/me13-02-0022.

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SummaryIntroduction: This article is part of the Focus Theme of Methods of Information in Medicine on “Managing Interoperability and Complexity in Health Systems”.Background: The proliferation of archetypes as a means to represent information of Electronic Health Records has raised the need of binding terminological codes – such as SNOMED CT codes – to their elements, in order to identify them univocally. However, the large size of the terminologies makes it difficult to perform this task manually.Objectives: To establish a baseline of results for the aforementioned problem by using off-the-sh

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Li, Yu, and Jin Shun Feng. "The Nice Characters of Biorthogonal Four-Element Wavelet Packets with Two-Scale." Key Engineering Materials 460-461 (January 2011): 351–56. http://dx.doi.org/10.4028/www.scientific.net/kem.460-461.351.

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In this article, the notion of orthogonal nonseparable four-dimensional wavelet packets, which is the generalization of orthogonal univariate wavelet packets, is introduced. A new approach for constructing them is presented by iteration method. A novel approach for constructing two-directional biorthogonal wavelet packets is developed. The biorthogonality property of four-dimensional wavelet packets is discussed. Three biorthogonality formulas concerning these wavelet packets are estabished. A constructive method for affine frames of is proposed.

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Zhao, Xiaopeng, Fengnan Liu, and Bo Liu. "FINITE ELEMENT METHOD FOR A NONLINEAR DIFFERENTIAL EQUATION DESCRIBING CRYSTAL SURFACE GROWTH." Mathematical Modelling and Analysis 19, no. 2 (2014): 155–68. http://dx.doi.org/10.3846/13926292.2014.909372.

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In this paper, for a nonlinear differential equation describing crystal surface growth, the finite element method is presented. A nice order error estimates is derived by means of a finite element projection approximation.

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Choi, Yoojin, Tae Jung Park, Doh C. Lee, and Sang Yup Lee. "Recombinant Escherichia coli as a biofactory for various single- and multi-element nanomaterials." Proceedings of the National Academy of Sciences 115, no. 23 (2018): 5944–49. http://dx.doi.org/10.1073/pnas.1804543115.

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Nanomaterials (NMs) are mostly synthesized by chemical and physical methods, but biological synthesis is also receiving great attention. However, the mechanisms for biological producibility of NMs, crystalline versus amorphous, are not yet understood. Here we report biosynthesis of 60 different NMs by employing a recombinant Escherichia coli strain coexpressing metallothionein, a metal-binding protein, and phytochelatin synthase that synthesizes a metal-binding peptide phytochelatin. Both an in vivo method employing live cells and an in vitro method employing the cell extract are used to synth

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Mai, Khoi D., William F. Cofer, and Donald A. Bender. "Quasi-Dynamic Implicit Finite Element Analysis of Steel-Clad, Wood-Framed Shear Walls." Transactions of the ASABE 63, no. 6 (2020): 1619–28. http://dx.doi.org/10.13031/trans.13846.

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HighlightsA new finite element modeling method was developed to predict performance of steel-clad, wood-framed diaphragms.The new method overcomes limitations of previous models and accurately predicts yielding and buckling behaviors.The new method will save time and money in developing design values for steel-clad, wood-frame diaphragms.Abstract. Various finite element codes and solution techniques have been developed for steel-clad, wood-framed (SCWF) shear walls over the past few decades. Most previous finite element models for SCWF shear walls under monotonic loading were based on a static

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Kosman, Kamarul Afizi, and Leslie Ling Fang Yi. "Kriteria Penerapan Elemen Identiti Kebangsaan Pada Bangunan Pencakar Langit Berdasarkan Kajian Kes Menara Berkembar PETRONAS (KLCC)." Jurnal Kejuruteraan 36, no. 6 (2024): 2519–33. http://dx.doi.org/10.17576/jkukm-2024-36(6)-22.

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The answer to the question of national architectural identity requires continuous strategies and efforts from various parties covering various architectural typologies. This study focuses on the development of a criterion for the application of architectural element design with national identity characters to skyscrapers that are classified as tall buildings above 150 metres. The PETRONAS Twin Towers building in Kuala Lumpur was selected as a study sample in the development of the criteria for the application of the national architectural identity element using the case study method. There are

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Welna, Maja, Anna Szymczycha-Madeja, and Pawel Pohl. "Simplified ICP OES-Based Method for Determination of 12 Elements in Commercial Bottled Birch Saps: Validation and Bioaccessibility Study." Molecules 25, no. 5 (2020): 1256. http://dx.doi.org/10.3390/molecules25051256.

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Commercially bottled birch saps (BSs) were analyzed for several nutrient (Ca, Cu, Fe, Mg, and Zn) and toxic (As, Cd, Ni, and Pb) elements using inductively coupled plasma optical emission spectrometry (ICP OES). The method was validated under the conditions of several sample preparation procedures, including a traditional digestion as well as alternative non-digestion schemes. It was found that the direct analysis of untreated BSs gives the best results, i.e., limits of detection at 0.02–5.8 ng mL−1, precision better than 5%, accuracy from 98.0% to 104.5% and determination of 12 elements in a

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Sell, Bryan Keith, and Scott Douglas Samson. "A tephrochronologic method based on apatite trace-element chemistry." Quaternary Research 76, no. 1 (2011): 157–66. http://dx.doi.org/10.1016/j.yqres.2011.03.007.

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AbstractGeochemical correlation of ash-fall beds with conventional tephrochronologic methods is not feasible when original glass composition is altered. Thus, alternative correlation methods may be required. Initial studies of heavily altered Paleozoic tephra (K-bentonites) have suggested the potential for employing trace-element concentrations in apatite as ash-fall bed discriminators. To further test the utility of apatite trace-element tephrochronology, we analyzed apatite phenocrysts from unaltered volcanic rocks with an electron microprobe: nine samples from rocks erupted during the Quate

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Ueno, M., and S. Tanoue. "Properties of the Magnetoresistive Elements for NiFe/Cu Multilayers Using the SAL Biasing Method." Journal of the Magnetics Society of Japan 19, no. 2 (1995): 401–4. http://dx.doi.org/10.3379/jmsjmag.19.401.

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Liu, Qi, Yan Yu, and Pingjian Ming. "A high-order control volume finite element method for thermoelastic analysis of functionally graded solids with mixed grids." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 11 (2018): 3994–4013. http://dx.doi.org/10.1177/0954406218811363.

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In this article, a new two-dimensional control volume finite element method has been developed for thermoelastic analysis in functionally graded materials. A nine-node quadrilateral element and a six-node triangular element are employed to deal with the mixed-grid problem. The unknown variables and material properties are defined at the node. The high-order shape functions of six-node triangular and nine-node quadrilateral element are employed to obtain the unknown variables and their derivatives. In addition, the material properties in functionally graded structure are also modeled by applyin

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Lampe, Kristian, Marjukka Mäkelä, Marcial Velasco Garrido, et al. "The HTA Core Model: A novel method for producing and reporting health technology assessments." International Journal of Technology Assessment in Health Care 25, S2 (2009): 9–20. http://dx.doi.org/10.1017/s0266462309990638.

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Objectives: The aim of this study was to develop and test a generic framework to enable international collaboration for producing and sharing results of health technology assessments (HTAs).Methods: Ten international teams constructed the HTA Core Model, dividing information contained in a comprehensive HTA into standardized pieces, the assessment elements. Each element contains a generic issue that is translated into practical research questions while performing an assessment. Elements were described in detail in element cards. Two pilot assessments, designated as Core HTAs were also produced

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