Journal articles: 'Multi-physic design'

1

Le Coz, Quentin, Daniel Ciazynski, Benoît Lacroix, Sylvie Nicollet, François Nunio, Alexandre Torre, Roser Vallcorba, and Louis Zani. "Towards a multi-physic platform for fusion magnet design—Application to DEMO TF coil." Fusion Engineering and Design 124 (November 2017): 104–9. http://dx.doi.org/10.1016/j.fusengdes.2017.03.076.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Zani, Louis, Benoît Lacroix, Alexandre Torre, Jean-Claude Vallet, Clément Berthinier, Christophe Bourcier, Nicolas Misiara, et al. "OLYMPE, a multi-physic platform for fusion magnet design: Development status and first applications." Cryogenics 108 (June 2020): 103086. http://dx.doi.org/10.1016/j.cryogenics.2020.103086.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Bendali, Mahraz, Cherif Larouci, Toufik Azib, Claude Marchand, and Gerard Coquery. "Design methodology of an interleaved buck converter for onboard automotive application, multi‐objective optimisation under multi‐physic constraints." IET Electrical Systems in Transportation 5, no. 2 (June 2015): 53–60. http://dx.doi.org/10.1049/iet-est.2013.0045.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Su, Hai Jun, Jun Zhang, Lin Liu, and Heng Zhi Fu. "Preparation Development of High-Quality Solar-Grade Multi-Crystalline Silicon by Directional Solidification." Advanced Materials Research 311-313 (August 2011): 1389–92. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.1389.

Full text

Abstract:

Silicon solar cell is well known as one of the cleanest and most potential renewable resources. As the major photovoltaic (PV) material in PV industry, multi-crystalline silicon (mc-Si) grown by directional solidification has recently attracted increasing attention because of its low production cost, low pollution and high throughput. Deeper understanding of the physic and optic properties, and preparation methods of the materials will lead to improved device design. This paper briefly presents basic directional solidification theory of multi-crystalline silicon, and reviews recent development of solar-grade multi-crystalline silicon. The directional solidification preparation techniques of high-quality solar-grade multi-crystalline silicon are detailed introduced and summarized. Furthermore, the existing problems and further development direction of directionally solidified multi-crystalline silicon for solar cell are discussed.

APA, Harvard, Vancouver, ISO, and other styles

5

Čiegis, Raimondas, Gerda Jankevičiūtė, and Natalija Tumanov. "ON EFFICIENT NUMERICAL ALGORITHMS FOR SIMULATION OF HIGH POWER ELECTRICAL CABLES." Mathematical Modelling and Analysis 20, no. 6 (November 23, 2015): 701–14. http://dx.doi.org/10.3846/13926292.2015.1108250.

Full text

Abstract:

The new virtual modelling tool is constructed, which is used for optimal design of power transmission lines and cables. The construction of such lines should meet the latest power transmission network technical and economical requirements. The solver is is based on classical and modified mathematical models describing main heat conduction processes: diffusion, convection and radiation in various materials and environments. In basic heat conduction equation, we take into account a linear dependence of the resistance on temperature. Multi-physic and multi-scale models are required to simulate industrial cases of power transmission lines. The velocity of convective transport of the heat in air regions is simulated by solving a coupled thermo-convection problem including the heat conduction problem and the standard Navier-Stokes model of the heat flow in air. Another multi-physic model is used to describe changes of material heat conduction coefficients in soil due to influence of heating. This process is described by by solving a simplified mass balance equation for flows in porous media. The multi-scale and homogenization analysis is required to to formulate simple and accurate mathematical describing heat conduction process is metal region which consists of a bundle of tightly coupled metal wires. The FVM is used to solve the obtained systems of differential equations. Discretization of the domain is done by applying “aCute” mesh generator, which is a modification of the well-known Triangle mesh generator. The discrete schemes are implemented by using the OpenFOAM tool.

APA, Harvard, Vancouver, ISO, and other styles

6

Guan, Wei, Jinghai Sun, Xiang Li, and Zhihao Ren. "Unmanned Surface Vessel Steering L2 Gain Robust Control Based on Closed-Loop Shaping Filter." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 37, no. 5 (October 2019): 1018–27. http://dx.doi.org/10.1051/jnwpu/20193751018.

Full text

Abstract:

With the introduction of the closed-loop shaping filtering method into the L2 gain robust controller design strategy, a nonlinear robust steering controller for unmanned surface vessel is designed under the planning and control strategy in this paper. The rigorous mathematical analysis and synthesis characteristics of the L2 gain robust control theory and the Lyapunov design method are fully utilized in the controller design process. Furthermore, the concept of the closed-loop shaping filtering based on the classical closed-loop control theory is taken into the controller design strategy. Therefore, the time domain controller design methods integration with the frequency domain controller design strategy are merged togehter to complete the unmanned surface vessel steering controller design in the view of practical engineering and planning and control strategy. Finally, compared with several practical controller design methods in the multi-direction irregular waves, the simulation results show that the proposed steering controller design strategy has concise structure, distinctive physic meanings of the controller parameters and superior comprehensive control performance.

APA, Harvard, Vancouver, ISO, and other styles

7

Febrianti, Teti, Asrul Tsani, and Amalia Nur Milla. "Analisis Preferensi Konsumen Terhadap Sayuran Hidroponik Di Kota Sukabumi." Paspalum: Jurnal Ilmiah Pertanian 7, no. 1 (June 1, 2019): 1. http://dx.doi.org/10.35138/paspalum.v7i1.85.

Full text

Abstract:

There is society awerness in helat life style that makes consumer is more selective in choosing consumed vegetable. The hydroponic vegetable product that is free from pesticide becomes an alternative for consumer, which have health life style. The research aims at knowing how consumer preference toward hydroponic vegetable and knowing how consumer attitude toward a vegetable hydroponic attribute that is most consideration in a purchase decision. The research applied a descriptive method. Total respondents that were studied as much as 50 people by applying purposive sampling. Analysis design applied descriptive statistic and attitude analysis of fishbein multi-attribute. The resulting research declares consumer prefer hydroponic vegetable that has fresh level < 3 days, has a physical wide leaf which has no hole, different taste with conventional vegetable, type variety > 3 types, price < 5.000 IDR, and vegetable in the plastic package. The most consumer consideration attribute in purchase decision respectively is vegetable fresh level, leaf physic, package, vegetable taste, price, and type variety. The most vegetable type that is prefered by the consumer in pakcoy.

APA, Harvard, Vancouver, ISO, and other styles

8

Seon Park, Jong, Seung Hae Kim, Min Ki Noh, and Bu Seung Cho. "Science DMZ network architecture deployment and performance evaluation to large scaled data transfer efficiency." International Journal of Engineering & Technology 7, no. 3.3 (June 8, 2018): 191. http://dx.doi.org/10.14419/ijet.v7i2.33.13884.

Full text

Abstract:

Background/Objectives: Recently, it has been great issue to transfer large-scale science dada such as scientific field of high energy physic, astronomical space, super-computing simulation. To solve the transfer issue and to increase transfer efficiency, it needs a multi-dimensional approaches.Methods/Statistical analysis: To improve the transfer performance, approaches from the perspective of components such as network equipment, transmission protocol, and transmission application have been suggested. Effort to TCP congestion control algorithm and parallelism of data transfer channel are representative example to improve performance. However, the solution through the each component has a limitation in maximizing the transmission efficiency.Findings: Science DMZ is a new network architecture that can maximize transfer performance. It maximizes transfer efficiency through approach to all components, such as network equipment, dedicated network path, transfer applications, and local institute firewall policies. With these complicated components, science DMZ network architecture can greatly improve the transfer efficiency. In this paper, we design and construct a science DMZ network architecture between two organizations that utilize supercomputing resources based on KREONET and evaluate the performance.Improvements/Applications: After configuring the experiment environment, we measured network performance through iperf and file transfer performance test through SCP. Experiment result showed around 388% Improvement than that of existing method.

APA, Harvard, Vancouver, ISO, and other styles

9

Reinbold, Vincent, Van-Binh Dinh, Daniel Tenfen, Benoit Delinchant, and Dirk Saelens. "Optimal operation of building microgrids – comparison with mixed-integer linear and continuous non-linear programming approaches." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 37, no. 2 (March 5, 2018): 603–16. http://dx.doi.org/10.1108/compel-11-2016-0489.

Full text

Abstract:

PurposeThis paper aims to present two mathematical models to solve the Energy Management problem of a building microgrid (MG). In particular, it proposes a deterministic mixed integer linear programming (MILP) and non-linear programming (NLP) formulations. This paper focuses on the modelling process and the optimization performances for both approaches regarding optimal operation of near-zero energy buildings connected to an electric MG with a 24-h time horizon. Design/methodology/approachA general architecture of a MG is detailed, involving energy storage systems, distributed generation and a thermal reduced model of the grid-connected building. A continuous non-linear model is detailed along with linearizations for the mixed-integer liner formulation. Multi-physic, non-linear and non-convex phenomena are detailed, such as ventilation and air quality models. FindingsResults show that both approaches are relevant for solving the energy management problem of the building MG. Originality/valueIntroduction and modelling of the thermal loads within the MG. The resulting linear program handles the mutli-objective trade-off between discomfort and the cost of use taking into account air quality criterion. Linearization and modelling of the ventilation system behaviour, which is generally non-linear and non-convex equality constraints, involving air quality model, heat transfer and ventilation power. Comparison of both MILP and NLP methods on a general use case provides a solution that can be interpreted for implementation.

APA, Harvard, Vancouver, ISO, and other styles

10

Ningsih, Tri Ratna, Moh Ali Mansur, and Arif Efendi. "the THE CORRELATION BETWEEN SELF-EFFICACY OF POOR MOTHER WITH NUTRITIONAL PATTERN TO UNDER-FIVE CHILDREN." INTERNATIONAL JOURNAL OF NURSING AND MIDWIFERY SCIENCE (IJNMS) 2, no. 02 (September 29, 2018): 169–77. http://dx.doi.org/10.29082/ijnms/2018/vol2.iss02.143.

Full text

Abstract:

Nutrition fulfill was an important thing to be considered in increasing the nutrition status of under-fives, because under five years old children had rapid growth phase. Therefore, the intake of nutrition need to get more attention. The purpose of this research was to analyze the correlation between self-efficacy of mother from poor families with nutritional parenting pattern of under-fives in the area of Mojokerto Regency East Java. The research design used case control with case population which was poor mother with healthy under-fives and control population was poor mother with under-fives who had nutritional problems. The number of sample was 79 people for case group and 41 people for control group. The sampling technique used multi stage sampling. The data collection used questionnaire which had beed tested the validity and reliability to 30 people. The data analysis used statistic chi square test. The research result showed that the correlation of self-efficacy with good parenting pattern as many as 68 people (81,0%) the analysis result with chi square obtained uji p = 0,000, self-efficacy with good love pattern as many as 52 people (61,9 %) the result analysis with chi square test obtained p = 0,000, self-efficacy with sharpening pattern as many as 57 people (67,9%) the analysis result of chi square test obtained p = 0,000, self-efficacy with nutritional parenting pattern as many as 44 people (52,4%) the result of analysis with chi square test obtained p = 0.001, value of Î± = 0,05, meant there was correlation between self-efficacy with nutritional parenting pattern of under-fives. The nutritional parenting of under-fives was important to be considered because it had huge impact and prolonged impact on health status, physic and mental development, and also the productivity of children when they grew up, so self-efficacy was needed to give nutrition to their under-fives.

APA, Harvard, Vancouver, ISO, and other styles

11

Ningsih, Tri Ratna, Moh Ali Mansur, and Arif Efendi. "the THE CORRELATION BETWEEN SELF-EFFICACY OF POOR MOTHER WITH NUTRITIONAL PATTERN TO UNDER-FIVE CHILDREN." INTERNATIONAL JOURNAL OF NURSING AND MIDWIFERY SCIENCE (IJNMS) 2, no. 02 (September 29, 2018): 169–77. http://dx.doi.org/10.29082/ijnms/2018/vol2/iss02/143.

Full text

Abstract:

Nutrition fulfill was an important thing to be considered in increasing the nutrition status of under-fives, because under five years old children had rapid growth phase. Therefore, the intake of nutrition need to get more attention. The purpose of this research was to analyze the correlation between self-efficacy of mother from poor families with nutritional parenting pattern of under-fives in the area of Mojokerto Regency East Java. The research design used case control with case population which was poor mother with healthy under-fives and control population was poor mother with under-fives who had nutritional problems. The number of sample was 79 people for case group and 41 people for control group. The sampling technique used multi stage sampling. The data collection used questionnaire which had beed tested the validity and reliability to 30 people. The data analysis used statistic chi square test. The research result showed that the correlation of self-efficacy with good parenting pattern as many as 68 people (81,0%) the analysis result with chi square obtained uji p = 0,000, self-efficacy with good love pattern as many as 52 people (61,9 %) the result analysis with chi square test obtained p = 0,000, self-efficacy with sharpening pattern as many as 57 people (67,9%) the analysis result of chi square test obtained p = 0,000, self-efficacy with nutritional parenting pattern as many as 44 people (52,4%) the result of analysis with chi square test obtained p = 0.001, value of Î± = 0,05, meant there was correlation between self-efficacy with nutritional parenting pattern of under-fives. The nutritional parenting of under-fives was important to be considered because it had huge impact and prolonged impact on health status, physic and mental development, and also the productivity of children when they grew up, so self-efficacy was needed to give nutrition to their under-fives.

APA, Harvard, Vancouver, ISO, and other styles

12

Cavaliere, Pasquale, Angelo Perrone, and Alessio Silvello. "Steel nitriding optimization through multi-objective and FEM analysis." Journal of Computational Design and Engineering 3, no. 1 (August 28, 2015): 71–90. http://dx.doi.org/10.1016/j.jcde.2015.08.002.

Full text

Abstract:

Abstract Steel nitriding is a thermo-chemical process leading to surface hardening and improvement in fatigue properties. The process is strongly influenced by many different variables such as steel composition, nitrogen potential, temperature, time, and quenching media. In the present study, the influence of such parameters affecting physic-chemical and mechanical properties of nitride steels was evaluated. The aim was to streamline the process by numerical–experimental analysis allowing defining the optimal conditions for the success of the process. Input parameters–output results correlations were calculated through the employment of a multi-objective optimization software, modeFRONTIER (Esteco). The mechanical and microstructural results belonging to the nitriding process, performed with different processing conditions for various steels, are presented. The data were employed to obtain the analytical equations describing nitriding behavior as a function of nitriding parameters and steel composition. The obtained model was validated, through control designs, and optimized by taking into account physical and processing conditions. Highlights The paper shows the development of a model based on very broad experimental activity. The data were employed to provide a provisional tool for nitrided steel mechanical and microstructural behavior. A very good experimental–numerical correlation was found.

APA, Harvard, Vancouver, ISO, and other styles

13

Zani, L., F. Bonne, C. Bourcier, F. Dejoie, P. Hertout, C. Hoa, B. Lacroix, et al. "Development of a multi-physic platform OLYMPE for magnet fusion design: Progresses update and applications." Cryogenics, May 2022, 103479. http://dx.doi.org/10.1016/j.cryogenics.2022.103479.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Squadroni, Francesco, Giuseppe De Michele, Enrico Sergio Mazzucchelli, Ingrid Demanega, Sara Mangialardo, and Stefano Avesani. "Analysis of condensation and ventilation phenomena for double skin façade units." Journal of Building Physics, April 12, 2022, 174425912210843. http://dx.doi.org/10.1177/17442591221084351.

Full text

Abstract:

This paper presents a study of the thermo-hygrometric behaviour of a Double Skin Façade (DSF) unit. The study aims (i) at comparing currently used calculation procedures according to European and American standards (UNI EN ISO 10077, UNI EN ISO 12631:2018, ISO 15099:2003, ANSI/NFRC 100 for the thermal performance and ISO 13788:2012 (2012) for the condensation risk), and (ii) at assessing the 2D hygrothermal performance of a double skin module through a Finite Element Method (FEM)-based model. According to the current standards, a detailed characterization of thermal and fluid dynamic phenomena in closed and ventilated cavities is neglected and a simplified approach is proposed, which tends to overestimate the overall U-value of the curtain wall (UCW) due to an incremental thermal resistance that depends on the thickness of the air gap layer and the level of ventilation. The potential risk of this simplification is that the DSF estimated design performance, whilst complying with regulatory requirements, present inconsistencies respect to the real behaviour, impacting energy, comfort, material degradation, etc. Accurate assessments could be done already during design through detailed FEM multi-physic analyses. Nevertheless, those require a specific knowledge, are cost and time-consuming. As a first step, this study focuses on comparing the normed calculation approach for the design, against a detailed FEM-based multi-physics methodology. Specifically, this couples CFD, hygrothermal and Ray Tracing physics in a tool for the calculation of thermal transmittance, g-value and relative humidity of a DSF with a customizable geometry. As a second step, given a real DSF unit that showed unforeseen phenomena of surface condensation inside the cavity during several hours in spring and autumn, the multi-physic tool has been used to evaluate the condensation risk with the current and modified DSF design, under static and time-dependent boundary conditions.

APA, Harvard, Vancouver, ISO, and other styles

15

Le Coz, Quentin, Sébastien Bonici, François Bonne, Slim Constans, Benoît Lacroix, Alexandre Louzguiti, François Nunio, Alexandre Torre, and Louis Zani. "TACTICS: overview of a multi-physic analysis tool for fusion magnet design and application to DEMO TF coil." Cryogenics, September 2022, 103553. http://dx.doi.org/10.1016/j.cryogenics.2022.103553.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Du, Yuchuan, Han Wang, Qian Gao, Ning Pan, Cong Zhao, and Chenglong Liu. "Resilience concepts in integrated urban transport: a comprehensive review on multi-mode framework." Smart and Resilient Transportation, July 27, 2022. http://dx.doi.org/10.1108/srt-06-2022-0013.

Full text

Abstract:

Purpose Resilience concepts in integrated urban transport refer to the performance of dealing with external shock and the ability to continue to provide transportation services of all modes. A robust transportation resilience is a goal in pursuing transportation sustainability. Under this specified context, while before the perturbations, robustness refers to the degree of the system’s capability of functioning according to its design specifications on integrated modes and routes, redundancy is the degree of duplication of traffic routes and alternative modes to maintain persistency of service in case of perturbations. While after the perturbations, resourcefulness refers to the capacity to identify operational problems in the system, prioritize interventions and mobilize necessary material/ human resources to recover all the routes and modes, rapidity is the speed of complete recovery of all modes and traffic routes in the urban area. These “4R” are the most critical components of urban integrated resilience. Design/methodology/approach The trends of transportation resilience's connotation, metrics and strategies are summarized from the literature. A framework is introduced on both qualitative characteristics and quantitative metrics of transportation resilience. Using both model-based and mode-free methodologies that measure resilience in attributes, topology and system performance provides a benchmark for evaluating the mechanism of resilience changes during the perturbation. Correspondingly, different pre-perturbation and post-perturbation strategies for enhancing resilience under multi-mode scenarios are reviewed and summarized. Findings Cyber-physic transportation system (CPS) is a more targeted solution to resilience issues in transportation. A well-designed CPS can be applied to improve transport resilience facing different perturbations. The CPS ensures the independence and integrity of every child element within each functional zone while reacting rapidly. Originality/value This paper provides a more comprehensive understanding of transportation resilience in terms of integrated urban transport. The fundamental characteristics and strategies for resilience are summarized and elaborated. As little research has shed light on the resilience concepts in integrated urban transport, the findings from this paper point out the development trend of a resilient transportation system for digital and data-driven management.

APA, Harvard, Vancouver, ISO, and other styles

17

Hosseini, Ashkan, Johannes L. T. Hage, Arjan Duiker, Koen Meijer, Tim Peeters, Erik Offerman, and Yongxiang Yang. "Off-Gas System Scale-Up of HIsarna Iron-Making Process: A CFD-Based Approach." Metallurgical and Materials Transactions B, September 2, 2022. http://dx.doi.org/10.1007/s11663-022-02620-4.

Full text

Abstract:

AbstractFor all industrial applications, predicting system characteristics and behavior plays a vital role before constructing costly and complex multi-physic systems. Correct and reliable predictions become even more important once the aim is to go from small- to large-scale processes to establish an industrial demonstrations. In this study, a CFD-based scale-up of HIsarna off-gas system based on the Eulerian–Lagrangian approach is investigated and detailed step in scale-up procedure is discussed. A three-dimensional CFD model is developed and validated based on the available pilot scale data and used to design and scale up the post-combustion chamber (also known as reflux chamber). Detailed kinetics for volumetric and gas–solid reactions are incorporated in validated CFD model with a special attention to the wall boundary condition and modeling. The effect of reflux chamber geometry, oxygen injection ports, oxygen injection flowrate, isolation wall thickness, and inlet flue gas composition on different system characteristics such as heat loss through the wall, CO–H2–carbon mixture conversion, flue gas, and wall temperature are investigated. The aim of the scaled up geometry, like pilot scale, is to achieve full combustion of unwanted species inside the reflux chamber to assure zero emissions from the off-gas system. Compared to the pilot scale, the scaled up reflux chamber is capable of handling and removing higher amount of unwanted species coming from the main reactor and therefore lower CO–H2 and carbon particle emissions, mainly due to a larger size which provides larger volume and residence time for volumetric and gas–solid reaction to proceed.

APA, Harvard, Vancouver, ISO, and other styles

18

Hernansanz, Albert, Ramon Rovira, Joan Basomba, Roger Comas, and Alícia Casals. "EndoTrainer: a novel hybrid training platform for endoscopic surgery." International Journal of Computer Assisted Radiology and Surgery, February 13, 2023. http://dx.doi.org/10.1007/s11548-023-02837-x.

Full text

Abstract:

Abstract Purpose Endoscopy implies high demanding procedures, and their practice requires structured formation curricula supported by adequate training platforms. Physical platforms are the most standardised solution for surgical training, but over the last few years, virtual platforms have been progressively introduced. This research work presents a new hybrid, physic-virtual, endoscopic training platform that exploits the benefits of the two kind of platforms combining realistic tools and phantoms together with the capacity of measuring all relevant parameters along the execution of the exercises and of providing an objective assessment performance. Methods The developed platform, EndoTrainer, has been designed to train and assess surgical skills in hysteroscopy and cystoscopy following a structured curricula. The initial development and validation is focused on hysteroscopic exercises proposed in the Gynaecological Endoscopic Surgical Education and Assessment (GESEA) Certification Programme from The Academy and European Society for Gynaecological Endoscopy (ESGE) and analyses the obtained results of an extensive study with 80 gynaecologists executing 30 trials of the standard 30 degree endoscope navigation exercise. Results The experiments demonstrate the benefits of the presented hybrid platform. Multi-variable statistical analysis points out that all subjects have obtained statistically significant improvement in all relevant parameters: shorter and safer trajectories, improved 30-degree endoscope navigation, accurate positioning over the targets and reduction of the execution time. Conclusion This paper presents a new hybrid approach for training, and evaluating whether it provides an objectivable improvement of camera navigation endoscopic basic skills. The obtained results demonstrate the initial hypothesis: all subjects have improved their camera handling and navigation skills.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Multi-physic design'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles