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Application of RBF Neural Network and Finite Element Analysis to Solve the Inverse Problem of Defect Identification 应用RBF神经网络和有限元分析解决缺陷识别反问题
International Review of Physics Pub Date : 2016-08-31 DOI: 10.15866/IREPHY.V10I4.11397
T. Hacib, M. Mekideche, N. Ferkha
{"title":"Application of RBF Neural Network and Finite Element Analysis to Solve the Inverse Problem of Defect Identification","authors":"T. Hacib, M. Mekideche, N. Ferkha","doi":"10.15866/IREPHY.V10I4.11397","DOIUrl":"https://doi.org/10.15866/IREPHY.V10I4.11397","url":null,"abstract":"This paper presents an approach which is based on the use of radial basis function (RBF) neural network and finite element analysis to solve the inverse problem of defect identification. The approach is used to identify unknown defects in metallic walls. The methodology used in this study consists in the simulation of a large number of defects in a metallic wall, using the finite element method (FEM). Both variations in with and height of the defects are considered. Then the obtained results are used to generate a set of vectors for the training of a RBF neural network. Finally, the obtained neural networks are used to identify a group of new defects, simulated by the FEM, but not belonging to the original dataset. Performance of the RBF network was also compared with the most commonly used multilayer perceptron (MLP) network model. The reached results demonstrate the efficiency of the proposed approach, and that RBF network performs better than MLP network model","PeriodicalId":448231,"journal":{"name":"International Review of Physics","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115954916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
DBD treatment of textiles 纺织品的DBD处理
International Review of Physics Pub Date : 2016-07-31 DOI: 10.15866/IRECHE.V8I4.12985
R. Morent, N. Geyter, C. Leys
{"title":"DBD treatment of textiles","authors":"R. Morent, N. Geyter, C. Leys","doi":"10.15866/IRECHE.V8I4.12985","DOIUrl":"https://doi.org/10.15866/IRECHE.V8I4.12985","url":null,"abstract":"Dielectric barrier discharges (DBDs) are non-thermal plasmas which exist in a broad pressure range. A characteristic feature is that at least one electrode is covered by an insulating layer. They are able to effectively generate atoms, radicals and other excited species by energetic electrons. Therefore, they are widely used for industrial applications. Typical applications are ozone generation, environmental pollution control, excimer lamps, CO2-lasers, plasma displays and surface modification. In this paper, the literature on the application of DBDs for the treatment of textile materials is reviewed.","PeriodicalId":448231,"journal":{"name":"International Review of Physics","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129517978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Simultaneous Hydrodynamic and Thermal Flow Development of a Thermodependent Viscoplastic Fluid 热相关粘塑性流体的流体动力和热流同步发展
International Review of Physics Pub Date : 2016-04-30 DOI: 10.15866/IREPHY.V10I2.10409
N. Labsi, Y. K. Benkahla, A. Boutra, E. Brunier
{"title":"Simultaneous Hydrodynamic and Thermal Flow Development of a Thermodependent Viscoplastic Fluid","authors":"N. Labsi, Y. K. Benkahla, A. Boutra, E. Brunier","doi":"10.15866/IREPHY.V10I2.10409","DOIUrl":"https://doi.org/10.15866/IREPHY.V10I2.10409","url":null,"abstract":"Numerical analysis of simultaneously developing forced convection laminar flow and heat transfer of a viscoplastic fluid has been carried out. This fluid is incompressible and of thermodependent rheological properties. It consists on the sloe fruit juice with low pulp and pectin contents, which obeys the rheological law of Bingham and for which we adopt the Papanastasiou model to describe its behaviour. The flow takes place in an isothermal circular pipe. In order to validate the computing code, parametric computations were performed to investigate the effect of Reynolds, Prandtl and Bingham numbers on heat transfer. The effect of wall-to-inlet temperature difference on velocity and temperature profiles, Nusselt number and apparent friction factor was then analysed, by taking into account the temperature dependency of the fluid’s plastic viscosity and yield stress, for both heating and cooling situations. The results show on one hand, that the variability of the plastic viscosity provides more effect on hydrodynamic and thermal characteristics than the variability of the yield stress. On the other hand, the effect of variable plastic viscosity is more pronounced on the friction factor than on the Nusselt numbers.","PeriodicalId":448231,"journal":{"name":"International Review of Physics","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123282217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Axisymmetric High Temperature Jet Behaviours Based on a Lattice Boltzmann Computational Method. Part I: Argon Plasma 基于晶格玻尔兹曼计算方法的轴对称高温射流行为。第一部分:氩等离子体
International Review of Physics Pub Date : 2016-02-29 DOI: 10.15866/IREPHY.V10I1.10404
R. Djebali, B. Pateyron, M. Ganaoui, H. Sammouda
{"title":"Axisymmetric High Temperature Jet Behaviours Based on a Lattice Boltzmann Computational Method. Part I: Argon Plasma","authors":"R. Djebali, B. Pateyron, M. Ganaoui, H. Sammouda","doi":"10.15866/IREPHY.V10I1.10404","DOIUrl":"https://doi.org/10.15866/IREPHY.V10I1.10404","url":null,"abstract":"This article aims to address the issue of simulating plasma-jet by using an innovative computational approach namely the Lattice Boltzmann Method (LBM) from the point of view of extending the applications to simulating flows with temperature-dependent physical parameters. The work focuses on the phenomena occurring in plasma-jet that define the link between LBM lattice and physical lattice. High temperature dependence of the plasma parameters is considered. Argon characteristics fall into this category. This gas is one of the most ones used in plasma spraying. Complex thermal plasma jet phenomena and basis of classical methods in CFD (discretisation, stability condition, modeling…), in one side, and the simple scheme of the Boltzmann equation which is particularly adopted for simulating gases flows, in the other side, give us the possibility of taking out the dynamic and thermal characteristics of this complex flow. An important section on validation of this model includes details of available reference results is presented and discussed. It focuses mainly on the validation of our results with previous numerical and experimental results based on the centerline temperature and velocity profiles, its distributions over the computational domain and eventually the effect of the computational domain size. The jet width, the Gaussian radial profiles and the effects of inlet quantities are analyzed. A real spraying configuration is also examined. The quality of the results shows a great efficiency for the lattice Boltzmann method.","PeriodicalId":448231,"journal":{"name":"International Review of Physics","volume":"217 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114599546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Thermal Diffusivity Measurements of Biodiesel Fuel Using Thermal Lens Technique 利用热透镜技术测量生物柴油燃料的热扩散系数
International Review of Physics Pub Date : 2016-02-29 DOI: 10.15866/IREPHY.V10I1.10405
A. Rocha, W. C. Silva, L. F. M. Sangiorgio, M. Sthel, A. Andrade, D. Aranda, M. Castro
{"title":"Thermal Diffusivity Measurements of Biodiesel Fuel Using Thermal Lens Technique","authors":"A. Rocha, W. C. Silva, L. F. M. Sangiorgio, M. Sthel, A. Andrade, D. Aranda, M. Castro","doi":"10.15866/IREPHY.V10I1.10405","DOIUrl":"https://doi.org/10.15866/IREPHY.V10I1.10405","url":null,"abstract":"In this work the Photothermal Technique, Thermal Lens (LT) is used to obtain the thermal diffusivity of different kinds of biodiesel. The absolute values of thermal diffusivity were determined for samples obtained from fish, olive, animal fat, Piqui, Palm, and Pork fat. Thermal diffusivity essentially measures the thermalization time of a given material and it is known to be strongly dependent upon composition as well as processing conditions. Therefore, the use of non-conventional and advantageous methods to measure the biodiesel appears to be relevant.","PeriodicalId":448231,"journal":{"name":"International Review of Physics","volume":"339 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132949024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Quantized Weak Neutral Charge in Electroweak Interaction and a Possible GUT Group for Fundamental Force Unification 电弱相互作用中的量子化弱中性电荷和基本力统一可能的GUT群
International Review of Physics Pub Date : 2016-02-29 DOI: 10.15866/IREPHY.V10I1.9600
J. Shen
{"title":"Quantized Weak Neutral Charge in Electroweak Interaction and a Possible GUT Group for Fundamental Force Unification","authors":"J. Shen","doi":"10.15866/IREPHY.V10I1.9600","DOIUrl":"https://doi.org/10.15866/IREPHY.V10I1.9600","url":null,"abstract":"The topics relevant to grand unified theories (GUT) for fundamental forces have been investigated in the literature for four decades. The possible quantization of weak neutral charge is suggested within the model of electroweak unification in this paper, and based on this scheme, a theoretical weak mixing angle (sin2θw = 3/13 = 0.230769…), which agrees well with experimental measurements, can be obtained. In order to explore the origin of quantized weak neutral charge, a model of SU(7) grand unification is proposed. We will show that in the SU(N) GUT, N must be at least 7 in order to interpret such a theoretical weak mixing angle. It can be found that under proper weak mixing conditions for diagonal (neutral) gauge fields, such a theoretical weak mixing angle can be derived. Some relevant topics such as gauge-field vielbein and adjoint vielbein are discussed. Though there are still many problems that have not been resolved, the present scenario would enable us to gain insight into relevant topics such as gauge symmetry breaking, electroweak force unification as well as grand unification.","PeriodicalId":448231,"journal":{"name":"International Review of Physics","volume":"723 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132705798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Oxidation of Phenol in the Presence of CuO/γ-Al2O3 and NiO/γ-Al2O3 as Catalyst CuO/γ-Al2O3和NiO/γ-Al2O3催化苯酚氧化研究
International Review of Physics Pub Date : 2015-12-31 DOI: 10.15866/IREPHY.V9I6.10402
L. Giraldo, J. Moreno-Piraján
{"title":"Oxidation of Phenol in the Presence of CuO/γ-Al2O3 and NiO/γ-Al2O3 as Catalyst","authors":"L. Giraldo, J. Moreno-Piraján","doi":"10.15866/IREPHY.V9I6.10402","DOIUrl":"https://doi.org/10.15866/IREPHY.V9I6.10402","url":null,"abstract":"The oxidation of phenol solutions (10 g/L) has been studied in a batch reactor. Activity catalytic was performed over two type catalysts: CuO/γ-Al2O3 and NiO/γ-Al2O3 prepared in our laboratory. Isothermal runs between 973K and 1223K were carried out under an oxygen pressure of 25 atm. Phenol conversions as well as pH and temperature effect measurements were recorded. Almost complete phenol conversion was obtained for all catalysts. However, conversion to CO2 was only partial. Laboratory prepared catalysts gave the best performance in terms of activity and selectivity with the lowest induction period. Tests showed that catalysts are active in the conditions of operation. Measurement of titration calorimetric was realized.","PeriodicalId":448231,"journal":{"name":"International Review of Physics","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115706659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of the Response of Thermal Sensors in Adsorption Microcalorimetry 热传感器在吸附微量热法中的响应分析
International Review of Physics Pub Date : 2015-10-31 DOI: 10.15866/IREPHY.V9I5.10400
V. Garcia-Cuello, J. Moreno-Piraján, L. Giraldo-Gutiérrez, K. Sapag
{"title":"Analysis of the Response of Thermal Sensors in Adsorption Microcalorimetry","authors":"V. Garcia-Cuello, J. Moreno-Piraján, L. Giraldo-Gutiérrez, K. Sapag","doi":"10.15866/IREPHY.V9I5.10400","DOIUrl":"https://doi.org/10.15866/IREPHY.V9I5.10400","url":null,"abstract":"Three different designs for adsorption calorimeters are presented, which use sensors based on the Seebeck effect. The noises of signals with respect to the baseline are evaluated on each one of the builded equipment and the detection limit of the thermal effects is expressed in µWatt. It was determined that the different designs and working conditions affect the baseline noise and the detection limit. Values of the noise in the baseline are between ± 100 µV and ± 0,5 µV and between 887,2 and 24 µWatt. These values allow making measures in the solid-gas interphase with very good precision.","PeriodicalId":448231,"journal":{"name":"International Review of Physics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122286097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The Holographic Energy in the Model of the Mixture of Perfect Fluids 完美流体混合模型中的全息能量
International Review of Physics Pub Date : 2015-08-31 DOI: 10.15866/irephy.v9i4.7803
A. Khalid, A. Marrakchi
{"title":"The Holographic Energy in the Model of the Mixture of Perfect Fluids","authors":"A. Khalid, A. Marrakchi","doi":"10.15866/irephy.v9i4.7803","DOIUrl":"https://doi.org/10.15866/irephy.v9i4.7803","url":null,"abstract":"","PeriodicalId":448231,"journal":{"name":"International Review of Physics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122242683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spectrophotometric Analysis UV-VIS Irradiated Ternary Hybrid PMMA Composite 紫外-可见辐照三元杂化PMMA复合材料的分光光度分析
International Review of Physics Pub Date : 2015-08-31 DOI: 10.15866/IREPHY.V9I4.7614
R. Al-Khafaji, Rusul Taha Hussein
{"title":"Spectrophotometric Analysis UV-VIS Irradiated Ternary Hybrid PMMA Composite","authors":"R. Al-Khafaji, Rusul Taha Hussein","doi":"10.15866/IREPHY.V9I4.7614","DOIUrl":"https://doi.org/10.15866/IREPHY.V9I4.7614","url":null,"abstract":"Ternary hybrid composite PMMA matrix with TiO2-Al2O3- ZrO2 as additives were prepared carried out casting method. Range of weight fractions (92-84 wt %) of PMMA, fixed percentage (4%) of TiO2 and range of weight fractions (4-12 wt %) of Al2O3 and ZrO2 were used as started materials. Optical constants were obtained of the prepared samples using spectrometer (UV- VIS). Absorption coefficient, extinction coefficient, refractive index and optical energy gap were calculated. It was noticing of absorption coefficient and extinction coefficient and refractive index values for (PMMA - TiO2- Al2O3) higher than that of (PMMA - TiO2- ZrO2), also, more decreasing optical energy gap values in the first composites than other samples.","PeriodicalId":448231,"journal":{"name":"International Review of Physics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124932027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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