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Application of NURBS in the Fracture Mechanics Framework to Study the Stress Intensity Factor NURBS在断裂力学框架中的应用研究应力强度因子
Pub Date : 2023-01-23 DOI: 10.19139/soic-2310-5070-1553
S. Montassir, H. Moustabchir, A. Elkhalfi
In this investigation, we successfully employed the Non-Uniform Rational B-spline (NURBS) to study the fracture mechanics. the NURBS functions are very popular in the design field (CAD model) and it is used as an alternative to Lagrange interpolation polynomials. The extended isogeometric analysis based on this basis function is used to evaluate the stress intensity factors (SIFs) in order to control the crack propagation. For various crack lengths, SIFs were calculated to validate the accuracy of this technique. The results obtained are in good agreement with the available techniques as CFEM, X-FEM.
在这项研究中,我们成功地采用了非均匀有理b样条(NURBS)来研究断裂力学。NURBS函数在设计领域(CAD模型)中非常流行,它被用作拉格朗日插值多项式的替代方法。基于该基函数的扩展等几何分析用于计算应力强度因子,以控制裂纹的扩展。对于不同裂纹长度,计算了SIFs以验证该技术的准确性。所得结果与现有的CFEM、X-FEM方法吻合较好。
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引用次数: 0
Industry 4.0 Implementation in Lean Supply Chain Management: a Systematic Literature Review 工业4.0在精益供应链管理中的实施:系统文献综述
Pub Date : 2023-01-23 DOI: 10.19139/soic-2310-5070-1539
Asmae El Jaouhari, Soumaya Fellaki, Mohamed Amejwal, Jabir Arif
The major aspects and impacts of the interrelationships between Industry 4.0 (I4.0) technology and Lean Supply Chain Management are discussed in this article (LSCM). Many practical LSCM systems based on I4.0 have lately appeared. Despite this, there has been little research into the use of I4.0 technologies within LSCM. Machine learning, smart factories, blockchain, and the internet of services (IoS) are all possible LSCM revolution enablers. The goal of this research is to find out more about present and potential I4.0 technologies that can improve LSCM research and application in order to fill a gap in the current literature. A Systematic Literature Review (SLR) technique was used for the collection, selection, and evaluation of published literature. We looked at 79 studies published between 2010 and 2021 that were found in the Scopus database.
本文讨论了工业4.0 (I4.0)技术与精益供应链管理之间相互关系的主要方面和影响。最近出现了许多基于I4.0的实用LSCM系统。尽管如此,在LSCM中使用I4.0技术的研究很少。机器学习、智能工厂、区块链和互联网服务(IoS)都可能是LSCM革命的推动者。本研究的目的是找出更多关于现有的和潜在的工业4.0技术,这些技术可以改善LSCM的研究和应用,以填补当前文献中的空白。系统文献综述(SLR)技术用于收集、选择和评价已发表的文献。我们查看了Scopus数据库中2010年至2021年间发表的79项研究。
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引用次数: 0
Thermal Performance Analysis of Functional Parameters of the Floor Heating System in Africa 非洲地区地暖系统功能参数的热性能分析
Pub Date : 2023-01-23 DOI: 10.19139/soic-2310-5070-1551
Safaa Oubenmoh, Afaf Charraou, R. Saadani, M. Rahmoune, Abdelouahad Ait msaad, A. Jamil, E. H. Sebbar
Buildings frequently utilize radiant heating floors because they offer benefits including effective use of space and homogeneous temperature distribution, which results in increased thermal comfort. The present work aims to investigate the perfect use of floor heating systems analytically and numerically with improved thermal performance to prove their efffficiency in various African climates. The evaluation depends on the functional parameters of the heating system and particularly focuses on floor surface temperature to acquire the desired heat flux and the perfect supply water temperature. According to results, It is desirable to use floor coverings with low thermal resistance and should not exceed R = 0.15 m2 . K/W since it has considerable influence on the thermal efffficiency of the underfloor heating components. The pipe diameter is suggested to be about 20 mm. By comparing pipe spacings of 15 mm and 30 mm, the difference in supply water temperature is approximately 7.4 C. The smaller the pipe spacing, the more energy it delivers and makes the floor much warmer while reducing heating time. Regarding the effect of pipe materials, PE-X is chosen for this study because of its low cost and resistance to corrosion and scaling. As the influence of these studied parameters on floor heating is remarkable, there is also the impact of the ambient temperature of each city on the floor heating efffficiency. The proposed model can be applied and considered potentially beneficial and helpful to the control, and design of floor heating systems, and choosing the right heating source.
建筑物经常使用辐射采暖地板,因为它们提供的好处包括有效利用空间和均匀的温度分布,从而增加热舒适性。目前的工作旨在通过分析和数值研究地板采暖系统的完美使用,以改善热性能,以证明其在各种非洲气候中的效率。评估取决于供暖系统的功能参数,特别关注地板表面温度,以获得所需的热流密度和理想的供水温度。根据结果,宜选用热阻较低的地板覆盖物,不应超过R = 0.15 m2。K/W对地板采暖组件的热效率有相当大的影响。管径建议在20mm左右。通过比较15mm和30mm的管道间距,供水温度的差异约为7.4℃。管道间距越小,传递的能量越多,使地板更温暖,同时减少供暖时间。对于管道材料的影响,本研究选择PE-X,因为它成本低,耐腐蚀,耐结垢。由于这些研究参数对地板采暖的影响是显著的,因此每个城市的环境温度对地板采暖效率也有影响。该模型对地暖系统的控制和设计,以及采暖源的选择具有一定的参考价值。
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引用次数: 1
Visual Servoing of a 3R Robot by Metaheuristic Algorithms 基于元启发式算法的3R机器人视觉伺服
Pub Date : 2023-01-23 DOI: 10.19139/soic-2310-5070-1552
Inssaf Harrade, A. Daoui, Z. Chalh, M. Sayyouri
In planar robot control, the singularity problem is frequently encountered when determining the geometric or kinematic robot model. To overcome this problem, a new method is presented in this paper. Indeed, this method is used to compute the joint positions of 3R robots with high accuracy. The main idea of the proposed method is to use a metaheuristic algorithm for retrieving the coordinates of four reference points in the object image that is captured by a hand-eye camera of the 3R robot. Then, the joint positions are estimated by using a metaheuristic algorithm. The resulting positions are then used for controlling the 3R robot for moving to the desired position. The simulation experiments are conducted by using several metaheuristic algorithms with the same population size (N = 400). The obtained results show the high accuracy of the proposed method in terms of determining the exact positions of the 3R robot joints, which leads to finding the optimal robot trajectory.
在平面机器人控制中,在确定机器人几何或运动模型时经常遇到奇异性问题。为了克服这一问题,本文提出了一种新的方法。实际上,该方法用于计算3R机器人的关节位置,具有较高的精度。该方法的主要思想是使用一种元启发式算法来检索由3R机器人的手眼相机捕获的物体图像中的四个参考点的坐标。然后,利用元启发式算法对关节位置进行估计。所得到的位置然后用于控制3R机器人移动到所需的位置。采用几种具有相同人口规模(N = 400)的元启发式算法进行模拟实验。结果表明,该方法在确定3R机器人关节的精确位置方面具有较高的精度,从而可以找到最优的机器人轨迹。
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引用次数: 0
Fuzzy Logic Control for Balancing a Two-Armed Inverted Pendulum 双臂倒立摆平衡的模糊控制
Pub Date : 2023-01-23 DOI: 10.19139/soic-2310-5070-1548
Boutaina EL Kinany, Mohamed Alfidi, Zakaria Chalh
The unicycle robot is an activated model with only one wheel, which ensures its safety. Researchers were particularly interested in the unicycle robot because of its great robustness, which allows it to travel around without colliding with the ground. The inverted pendulum having two arms is modelled using a mathematical representation based on the Lagrangian formulation in this work, which embodies our concept of the unicycle robot. The fuzzy logic control algorithm will then be used to produce a high level of solidity for this system.
独轮车机器人是一个激活模型,只有一个轮子,保证了它的安全性。研究人员对独轮车机器人特别感兴趣,因为它具有很强的稳健性,可以在不与地面相撞的情况下四处行驶。本文采用基于拉格朗日公式的数学表示对具有两臂的倒立摆进行建模,体现了我们对独轮车机器人的概念。然后使用模糊逻辑控制算法为该系统产生高水平的稳健性。
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引用次数: 0
Analysis of The Progressive Damage of A Notched AS4/PEEK Composite Laminate Subjected To Tensile Loading 缺口AS4/PEEK复合材料层合板在拉伸载荷作用下的渐进损伤分析
Pub Date : 2023-01-23 DOI: 10.19139/soic-2310-5070-1555
Hamza El idrissi, A. Seddouki
The purpose of this work aims to assess the failure of an open-hole composite laminate subjected to tensile loading, using different progressive damage approaches. Within Abaqus, a user-defined material subroutine (UMAT) was developed and implemented by applying a combination of Puck’s failure criterion and the gradual degradation model. In addition, the integrated model in Abaqus based on the Hashin failure criteria coupled with the continuous damage model has been also considered. Moreover, the effect of different specimen sizes on the behaviour of the AS4/PEEK composite laminate has been performed. The predicted results were compared to those available in the literature. The results of this comparative study showed good agreement between the experimental outcomes and the numerical predictions.
本研究的目的是利用不同的渐进损伤方法来评估受拉伸载荷影响的开孔复合材料层合板的破坏。在Abaqus中,通过应用Puck失效准则和逐渐退化模型的组合,开发并实现了用户定义的材料子程序(UMAT)。此外,还考虑了基于Hashin破坏准则和连续损伤模型的Abaqus集成模型。此外,不同试样尺寸对AS4/PEEK复合层压板行为的影响已被执行。预测结果与文献中可用的结果进行了比较。对比研究结果表明,实验结果与数值预测结果吻合较好。
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引用次数: 2
Quadratic Programming and Triangular Numbers Ranking to an Optimal Moroccan Diet with Minimal Glycemic Load 二次规划和三角数对最低血糖负荷的最佳摩洛哥饮食的排序
Pub Date : 2023-01-23 DOI: 10.19139/soic-2310-5070-1541
A. Ahourag, K. E. Moutaouakil, Abdelkhalak Bahri, S. Chellak, Hicham Baizri, M. Cheggour
In this work, we suggest a variety of optimal daily diets for people with diabetes in Morocco. To this end, we model the foods glycemic load in term of triangular fuzzy numbers. Then, we model the problem of daily diet in term of fuzzy quadratic optimization programming. To transform this model into a line model, we use a very performance ranking function. To solve the obtained model, we call particles swarm algorithm due to its performance and simplicity. Various experiments were carried out on the basis of feeds available on the Moroccan market and for different sizes of the PSO swarm. The experimental results show that our system proposes optimal diets with a reasonable glycemic load between, acceptable favorable gaps and unfavorable nutrients excesses. We show how to combine the proposed diets to obtain a balanced weekly regime.
在这项工作中,我们建议摩洛哥糖尿病患者的各种最佳日常饮食。为此,我们用三角模糊数对食物的血糖负荷进行建模。然后,用模糊二次优化规划方法对日常饮食问题进行建模。为了将该模型转换为直线模型,我们使用了一个非常性能排名函数。为了求解得到的模型,由于粒子群算法的性能和简单性,我们称之为粒子群算法。根据摩洛哥市场上的饲料和不同规模的PSO群进行了各种实验。实验结果表明,我们的系统在合理的血糖负荷、可接受的有利间隙和不利的营养过剩之间提出最佳饮食。我们展示了如何结合建议的饮食,以获得一个平衡的每周制度。
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引用次数: 1
A Hybrid Skin Lesions Segmentation Approach Based on Image Processing Methods 一种基于图像处理方法的混合皮肤病变分割方法
Pub Date : 2023-01-23 DOI: 10.19139/soic-2310-5070-1549
H. Moussaoui, Nabil El Akkad, Mohamed Benslimane
Presently image segmentation remains the most crucial stage in the image processing system. The main idea ofimage segmentation is to partition or divide a random image into several partitions depending on the problem to solve. In this paper, we will be presenting a new method of skin cancer detection based on Otsu’s thresholding algorithm and markercontrolled watershed method. This hybridization process is first of all started by segmenting the input image using fuzzy c-means algorithm which is a clustering method that gives the possibility to a pixel to belong to one or more clusters. After that, we will apply multi-Otsu which is a thresholding algorithm that separates the pixels of an image into a variety of classes depending on the intensity of the gray levels. The next step of this proposed method is the marker-controlled watershedalgorithm that divides the image into homogenous areas or regions by using edge-detection concepts including mathematical morphology. The proposed technique was applied and experienced using several images of different types of skin cancer that were collected and gathered from the web and also from the Kaggle dataset. To assess the worth of the achieved results, we used several evaluation metrics like dice coefficient, sensitivity, specificity as well as Jaccard similarity that all have shown good and satisfactory results.
目前,图像分割仍然是图像处理系统中最关键的阶段。图像分割的主要思想是根据要解决的问题将随机图像分割或分成若干个分区。在本文中,我们将提出一种基于Otsu阈值算法和标记控制分水岭法的皮肤癌检测新方法。该杂交过程首先通过使用模糊c均值算法对输入图像进行分割开始,模糊c均值算法是一种聚类方法,它赋予像素属于一个或多个聚类的可能性。之后,我们将应用multi-Otsu,这是一种阈值算法,根据灰度级别的强度将图像的像素划分为各种类别。该方法的下一步是标记控制的分水岭算法,该算法通过使用包括数学形态学在内的边缘检测概念将图像划分为均匀的区域或区域。通过从网络和Kaggle数据集中收集和收集的几种不同类型的皮肤癌图像,应用并体验了所提出的技术。为了评估所取得结果的价值,我们使用了几个评估指标,如骰子系数、灵敏度、特异性以及Jaccard相似性,这些指标都显示出良好和令人满意的结果。
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引用次数: 0
Preface for the Special Issue of International Congress on Engineering and Complex Systems ICECS’21 工程与复杂系统国际会议(ICECS ' 21)特刊前言
Pub Date : 2023-01-23 DOI: 10.19139/soic-2310-5070-1740
M. Benslimane, Z. Chalh, Oumayma Banouar
Ten papers selected and revised from the International Congress on Engineering and Complex Systems ICECS’2021, are highlighted.
重点介绍了从国际工程与复杂系统大会ICECS ' 2021中选择和修订的十篇论文。
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引用次数: 0
Modelling and Simulation of the Hybrid System PV-Wind PV-Wind混合系统的建模与仿真
Pub Date : 2023-01-23 DOI: 10.19139/soic-2310-5070-1535
A. A. Bangura, Mustapha Errouha, H. Hihi, Z. Chalh
In this paper, we focused on modeling and simulation of a hybrid solar-wind energy system, consisting of a photovoltaic cell and a wind turbine driven by a Permanent Magnet Synchronous Generator (PMSG). The proposed system gives details of the hybrid solar-wind system. In the PV subsystem, there will be a photovoltaic energy subsystem, MPPT controller, and a DC-DC boost converter. The wind turbine subsystem includes a wind turbine energy subsystem, PMSG, and MPPT controller. The MPPT controllers were designed to extract the maximum power regardless of the weather conditions and temperatures. The P and O algorithm is introduced in the MPPT used in the PV energy subsystem and on the control of the machine side converter (MSC). The proposed wind turbine energy subsystem is based on Direct Torque and Flux Control (DTFC). The simulated results are demonstrated to show that the hybrid solar-wind generating system can realize a maximum power point tracking control of wind and solar power to satisfy the energy demand over an extensive range under unpredictable atmospheric conditions. The system has been demonstrated by MATLAB/Simulink and tested for variable weather conditions and temperatures.
本文主要研究了由光伏电池和由永磁同步发电机(PMSG)驱动的风力发电机组成的混合太阳能-风能系统的建模与仿真。提出的系统给出了混合太阳风系统的细节。在光伏分系统中,将会有一个光伏能源分系统、MPPT控制器和一个DC-DC升压变换器。所述风力发电机子系统包括风力发电机能量子系统、PMSG和MPPT控制器。MPPT控制器的设计目的是无论天气条件和温度如何,都能提取最大功率。将P和O算法引入到光伏能源分系统的MPPT和机侧变换器的控制中。所提出的风力发电机能量子系统是基于直接转矩和磁链控制(DTFC)。仿真结果表明,该混合太阳能-风力发电系统能够实现风能和太阳能的最大功率点跟踪控制,在不可预测的大气条件下满足大范围的能源需求。该系统已通过MATLAB/Simulink进行了演示,并在不同的天气条件和温度下进行了测试。
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引用次数: 0
期刊
Statistics, Optimization & Information Computing
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