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PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2019 (ICCMSE-2019)最新文献

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Prediction of non-metallic inclusions in steel wires for tire reinforcement by means of machine learning algorithms 用机器学习算法预测轮胎加固钢丝中非金属夹杂物
M. Cuartas, E. Ruiz, D. Ferreño, J. Setién, V. Arroyo, F. Gutiérrez-Solana
This study was aimed at developing a reliable Machine Learning algorithm to classify castings of steel for tire reinforcement depending on the number and properties of inclusions, experimentally determined. 855 castings were available for training, validation and testing. 140 parameters are monitored during fabrication, which are the features of the analysis; the output is 1 or 0 depending on whether the casting is rejected or not. The following algorithms have been employed: Logistic Regression, K-Nearest Neighbors, Support Vector Classifier, Random Forests, AdaBoost, Gradient Boosting and Artificial Neural Networks. The reduced value of the rejection rate implies that classification must be carried out on an imbalanced dataset. Resampling methods and specific scores for imbalanced datasets (Recall, Precision and AUC rather than Accuracy) were used. Random Forest was the most successful method providing an area under the curve in the test set of 0.85. No significant improvements were detected after resampling. It has been proved that this tool allows the samples with a higher probability of being rejected to be selected, improving the effectiveness of the quality control. In addition, the optimized Random Forest has enabled to identify the most important features, which have been satisfactorily interpreted on a metallurgical basis.This study was aimed at developing a reliable Machine Learning algorithm to classify castings of steel for tire reinforcement depending on the number and properties of inclusions, experimentally determined. 855 castings were available for training, validation and testing. 140 parameters are monitored during fabrication, which are the features of the analysis; the output is 1 or 0 depending on whether the casting is rejected or not. The following algorithms have been employed: Logistic Regression, K-Nearest Neighbors, Support Vector Classifier, Random Forests, AdaBoost, Gradient Boosting and Artificial Neural Networks. The reduced value of the rejection rate implies that classification must be carried out on an imbalanced dataset. Resampling methods and specific scores for imbalanced datasets (Recall, Precision and AUC rather than Accuracy) were used. Random Forest was the most successful method providing an area under the curve in the test set of 0.85. No significant improvements were detected after resam...
本研究旨在开发一种可靠的机器学习算法,根据实验确定的夹杂物的数量和性质对轮胎增强钢铸件进行分类。855件铸件可用于培训、验证和测试。在制造过程中监测了140个参数,这是分析的特点;输出是1或0,这取决于是否拒绝转换。采用了以下算法:逻辑回归、k近邻、支持向量分类器、随机森林、AdaBoost、梯度增强和人工神经网络。拒绝率的减小值意味着必须对不平衡数据集进行分类。对不平衡数据集(召回率、精度和AUC而不是准确性)使用了重采样方法和特定分数。随机森林是最成功的方法,在测试集中提供了0.85的曲线下面积。重新采样后没有发现明显的改善。实践证明,该工具可以选择不合格概率较高的样品,提高了质量控制的有效性。此外,优化后的随机森林能够识别最重要的特征,这些特征在冶金基础上得到了令人满意的解释。本研究旨在开发一种可靠的机器学习算法,根据实验确定的夹杂物的数量和性质对轮胎增强钢铸件进行分类。855件铸件可用于培训、验证和测试。在制造过程中监测了140个参数,这是分析的特点;输出是1或0,这取决于是否拒绝转换。采用了以下算法:逻辑回归、k近邻、支持向量分类器、随机森林、AdaBoost、梯度增强和人工神经网络。拒绝率的减小值意味着必须对不平衡数据集进行分类。对不平衡数据集(召回率、精度和AUC而不是准确性)使用了重采样方法和特定分数。随机森林是最成功的方法,在测试集中提供了0.85的曲线下面积。重新检测后未发现明显改善。
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引用次数: 0
Numerical evaluation of an internally cracked autofrettaged spherical pressure vessel 内裂自增强球形压力容器的数值计算
M. Perl, M. Steiner
Internally cracked, fully or partially autofrettaged, spherical pressure vessels are analyzed by numerically calculating 3-D Stress Intensity Factor (SIF) distributions along the fronts of radial lunular or crescentic cracks emanating from the vessel’s bore. The finite element (FE) method is used employing singular elements along the crack front. A novel realistic autofrettage residual stress field incorporating the Bauschinger effect is embodied in the FE model using an equivalent temperature field. The SIFs are extracted by using both the J-integral and the displacement extrapolation methods, and are calculated for three vessel geometries, a wide range of crack depth to wall thickness ratios, various ellipticities, and three levels of autofrettage. A detailed study of the influence of the above parameters on the prevailing SIF is conducted. The results attest to the favorable effect of autofrettage in reducing the SIF, delaying crack initiation, slowing down crack growth rate, and thus, substantially prolonging the fatigue life of the vessel. They also emphasize the importance of properly accounting for the Bauschinger effect including re-yielding, and highlight the significance of the 3-D analysis.Internally cracked, fully or partially autofrettaged, spherical pressure vessels are analyzed by numerically calculating 3-D Stress Intensity Factor (SIF) distributions along the fronts of radial lunular or crescentic cracks emanating from the vessel’s bore. The finite element (FE) method is used employing singular elements along the crack front. A novel realistic autofrettage residual stress field incorporating the Bauschinger effect is embodied in the FE model using an equivalent temperature field. The SIFs are extracted by using both the J-integral and the displacement extrapolation methods, and are calculated for three vessel geometries, a wide range of crack depth to wall thickness ratios, various ellipticities, and three levels of autofrettage. A detailed study of the influence of the above parameters on the prevailing SIF is conducted. The results attest to the favorable effect of autofrettage in reducing the SIF, delaying crack initiation, slowing down crack growth rate, and thus, substantially pr...
通过数值计算从容器内径发出的径向月牙形或新月形裂纹前缘的三维应力强度因子(SIF)分布,对完全或部分自增强的球形压力容器内部裂纹进行了分析。采用沿裂纹前沿的奇异单元法进行有限元分析。采用等效温度场,在有限元模型中体现了一种新的包含鲍辛格效应的自增强残余应力场。SIFs是通过j积分和位移外推方法提取的,并计算了三种容器几何形状、大范围的裂缝深度与壁厚比、各种椭圆度和三种自强化水平。详细研究了上述参数对现行SIF的影响。结果表明,自增强在降低SIF、延迟裂纹萌生、减缓裂纹扩展速率,从而大幅延长容器的疲劳寿命方面具有良好的效果。他们还强调了正确考虑鲍辛格效应的重要性,包括再屈服,并强调了三维分析的重要性。通过数值计算从容器内径发出的径向月牙形或新月形裂纹前缘的三维应力强度因子(SIF)分布,对完全或部分自增强的球形压力容器内部裂纹进行了分析。采用沿裂纹前沿的奇异单元法进行有限元分析。采用等效温度场,在有限元模型中体现了一种新的包含鲍辛格效应的自增强残余应力场。SIFs是通过j积分和位移外推方法提取的,并计算了三种容器几何形状、大范围的裂缝深度与壁厚比、各种椭圆度和三种自强化水平。详细研究了上述参数对现行SIF的影响。结果表明,自增强在降低SIF、延迟裂纹起裂、减缓裂纹扩展速度等方面具有良好的效果,从而大大降低了材料的塑性。
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引用次数: 0
Comparison of hand arches in athletes 运动员手弓的比较
I. Špringrová, Monika Ballýová, Šárka Tomková, E. Bendíková
Aim: Finding out the state of hand arches in press-up positions in a selected sample of participants in relation to their sporting activities. Method: 29 participants took part in the study. The group of athletes consisted of 14 participantsi.e. 12 men and 2 women, age 27 ± 4.4, BMI 22 ± 2kg, frequency of training: 5 ± 1 per week. The control group included 15 participants from the general population, i.e. 8 men and 7 women age 23 ± 2.3, BMI 21.9 ± 2.2 working out no more than once a week without ambition to become professional athletes. The data was analysed in Microsoft Excel 2016 and in Control Freak programme (developed by Contchart Software company), particularly assessment by Shapiro -Wilk test. Results: The average value measured at PodoCam during initial examination was 0.88 ± 0.9 in the group of athletes and 1.92 ± 1.18 in the control group. Conclusion: The results of our study confirmed assumption concerning statistically significant incidence of standard hand arches in climbers. The character of climbing activity supports assumption about impact of the character of daily activities on the musculoskeletal system of climbers. Some physiotherapeutic methods use maintenance of hand arch in press-up position in order to improve techniques and performance of athletes.Aim: Finding out the state of hand arches in press-up positions in a selected sample of participants in relation to their sporting activities. Method: 29 participants took part in the study. The group of athletes consisted of 14 participantsi.e. 12 men and 2 women, age 27 ± 4.4, BMI 22 ± 2kg, frequency of training: 5 ± 1 per week. The control group included 15 participants from the general population, i.e. 8 men and 7 women age 23 ± 2.3, BMI 21.9 ± 2.2 working out no more than once a week without ambition to become professional athletes. The data was analysed in Microsoft Excel 2016 and in Control Freak programme (developed by Contchart Software company), particularly assessment by Shapiro -Wilk test. Results: The average value measured at PodoCam during initial examination was 0.88 ± 0.9 in the group of athletes and 1.92 ± 1.18 in the control group. Conclusion: The results of our study confirmed assumption concerning statistically significant incidence of standard hand arches in climbers. The character o...
目的:在选定的参与者样本中,找出与他们的体育活动有关的俯卧撑姿势的手弓的状态。方法:29名受试者参与研究。这组运动员共有14人。男12人,女2人,年龄27±4.4,BMI 22±2kg,训练频率:5±1次/周。对照组15人,男性8人,女性7人,年龄23±2.3,BMI为21.9±2.2,每周锻炼不超过1次,无成为职业运动员的抱负。数据在Microsoft Excel 2016和Control Freak程序(由Contchart软件公司开发)中进行分析,特别是夏皮罗-威尔克测试的评估。结果:运动员组PodoCam初测平均值为0.88±0.9,对照组为1.92±1.18。结论:本研究结果证实了攀岩者标准手弓发生率有统计学意义的假设。攀岩活动的特征支持了关于日常活动对攀岩者肌肉骨骼系统影响的假设。为了提高运动员的技术和表现,一些物理治疗方法在俯卧撑姿势中使用维持手弓的方法。目的:在选定的参与者样本中,找出与他们的体育活动有关的俯卧撑姿势的手弓的状态。方法:29名受试者参与研究。这组运动员共有14人。男12人,女2人,年龄27±4.4,BMI 22±2kg,训练频率:5±1次/周。对照组15人,男性8人,女性7人,年龄23±2.3,BMI为21.9±2.2,每周锻炼不超过1次,无成为职业运动员的抱负。数据在Microsoft Excel 2016和Control Freak程序(由Contchart软件公司开发)中进行分析,特别是夏皮罗-威尔克测试的评估。结果:运动员组PodoCam初测平均值为0.88±0.9,对照组为1.92±1.18。结论:本研究结果证实了攀岩者标准手弓发生率有统计学意义的假设。字符o…
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引用次数: 1
A study on accelerating convolutional neural networks 加速卷积神经网络的研究
Hsien-I Lin, Chung-Sheng Cheng
Recent deep-learning methods have been paid more attention than shallow-learning ones because they have deep and complex structures to approximate functions. The salient feature of deep neural networks is to use many layers where many of them are used to extract data features and few are for classification or regression. The most severe problem of a deep neural network is using too many parameters that cause too much memory usage and computing resources for both training and inference. Thus, deep learning approaches are not suitable for real-time industrial applications that have limited computing resources such as memory and CPU. For example, a famous convolutional neural network (CNN), AlexNet, uses up to 60 million parameters to train ImageNet dataset and many imaging projects apply AlexNet to their own applications as transfer learning. Thus, this work proposes a feasible solution to trim the CNN, speed it up, and keep the accuracy rate similar. Two main types of CNNs and AlexNet, were validated, respectively, in THUR15K, Caltech-101, Caltech-256, and GHIM10k datasets. The results show that the parameter amount greatly decreased (76%) but the recognition rate dropped slightly (1.34%).Recent deep-learning methods have been paid more attention than shallow-learning ones because they have deep and complex structures to approximate functions. The salient feature of deep neural networks is to use many layers where many of them are used to extract data features and few are for classification or regression. The most severe problem of a deep neural network is using too many parameters that cause too much memory usage and computing resources for both training and inference. Thus, deep learning approaches are not suitable for real-time industrial applications that have limited computing resources such as memory and CPU. For example, a famous convolutional neural network (CNN), AlexNet, uses up to 60 million parameters to train ImageNet dataset and many imaging projects apply AlexNet to their own applications as transfer learning. Thus, this work proposes a feasible solution to trim the CNN, speed it up, and keep the accuracy rate similar. Two main types of CNNs and AlexNet, were validated, resp...
与浅学习方法相比,深度学习方法由于具有较深和复杂的近似函数结构而受到越来越多的关注。深度神经网络的显著特点是使用多层,其中许多层用于提取数据特征,很少用于分类或回归。深度神经网络最严重的问题是使用太多的参数,这会导致过多的内存使用和计算资源用于训练和推理。因此,深度学习方法不适合内存和CPU等计算资源有限的实时工业应用。例如,著名的卷积神经网络(CNN) AlexNet使用多达6000万个参数来训练ImageNet数据集,许多成像项目将AlexNet作为迁移学习应用到自己的应用程序中。因此,本工作提出了一种可行的解决方案,以修剪CNN,加快其速度,并保持准确率相似。两种主要类型的cnn和AlexNet分别在THUR15K、Caltech-101、Caltech-256和GHIM10k数据集上进行了验证。结果表明,参数数量大大减少(76%),但识别率略有下降(1.34%)。与浅学习方法相比,深度学习方法由于具有较深和复杂的近似函数结构而受到越来越多的关注。深度神经网络的显著特点是使用多层,其中许多层用于提取数据特征,很少用于分类或回归。深度神经网络最严重的问题是使用太多的参数,这会导致过多的内存使用和计算资源用于训练和推理。因此,深度学习方法不适合内存和CPU等计算资源有限的实时工业应用。例如,著名的卷积神经网络(CNN) AlexNet使用多达6000万个参数来训练ImageNet数据集,许多成像项目将AlexNet作为迁移学习应用到自己的应用程序中。因此,本工作提出了一种可行的解决方案,以修剪CNN,加快其速度,并保持准确率相似。cnn和AlexNet的两种主要类型得到了验证,分别是…
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引用次数: 1
Computational formula for the impact of stochastic dependence on the insurance premium 随机依赖对保费影响的计算公式
J. Cha, Hyunju Lee, M. Finkelstein
Standard actuarial theory of multiple life insurance traditionally postulates independence for the remaining lifetimes mainly due to computational convenience rather than realism. In this paper, we propose a general common shock model for modelling dependent coupled lives and apply it to a life insurance model. Under the model, we derive the computational formula for the impact of stochastic dependence on the pricings of insurance policies involving multiple lives which are subject to common shocks.Standard actuarial theory of multiple life insurance traditionally postulates independence for the remaining lifetimes mainly due to computational convenience rather than realism. In this paper, we propose a general common shock model for modelling dependent coupled lives and apply it to a life insurance model. Under the model, we derive the computational formula for the impact of stochastic dependence on the pricings of insurance policies involving multiple lives which are subject to common shocks.
多重人寿保险的标准精算理论传统上假定剩余生命期的独立性,主要是由于计算方便而不是现实。在本文中,我们提出了一个通用的冲击模型来模拟依赖耦合生命,并将其应用于人寿保险模型。在此模型下,我们导出了随机依赖对多重生命保险定价影响的计算公式。多重人寿保险的标准精算理论传统上假定剩余生命期的独立性,主要是由于计算方便而不是现实。在本文中,我们提出了一个通用的冲击模型来模拟依赖耦合生命,并将其应用于人寿保险模型。在此模型下,我们导出了随机依赖对多重生命保险定价影响的计算公式。
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引用次数: 0
Development of information model and methods of data analysis on land taxation objects for Yekaterinburg city of Russia 俄罗斯叶卡捷琳堡市土地税收对象信息模型与数据分析方法的开发
V. Kalinin, A. Ilyin, A. Ilyina, N. Demin, A. Medvedev, Y. Kharitonov
The work is devoted to the use of information technology in the taxation system at the municipal level. As a result of the study, an information model was created and the characteristics of the land taxation objects of Yekaterinburg, Russia were analyzed. It has been proposed to use Shewhart control chart to single out a group of objects, the amount of land tax for which ones is formed for special reasons of non-random and non-market character. It was shown that for the city of Yekaterinburg, in the aggregate of land taxation objects, fractal structures with different fractal dimension can be distinguished. It was proposed to divide and group objects of taxation using the fractal dimension to optimize the procedure for calculating the tax sizes.
这项工作致力于在市级税务系统中使用信息技术。在此基础上,建立了信息模型,分析了俄罗斯叶卡捷琳堡土地税收对象的特征。有人提出,利用休哈特控制图,挑选出一组由于非随机性和非市场性质的特殊原因而形成的土地税数额对象。结果表明,对于叶卡捷琳堡市,在土地税收对象的集合中,可以区分出不同分形维数的分形结构。提出利用分形维数对税收对象进行划分和分组,以优化税收规模的计算过程。
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引用次数: 0
The course of hydrological drought in the river Drawa catchment (Northern Poland) as characterized by the standardized runoff index 以标准化径流指数为特征的波兰北部德拉河流域水文干旱过程
Katarzyna Kubiak-Wójcicka
The paper presents the course of hydrological droughts in the Drawa River catchment in the period of 1981– 2010. The study utilizes daily values of the Drawa’s discharge recorded in the Drawiny hydrological station and and daily values precipitation in two meteorological stations (Wierzchowo and Krzyz). Hydrological drought characteristics have been determined on the basis of the Standardized Runoff Index (SRI), which is a common hydrological drought index. SRI values were calculated on the basis of average monthly discharges that were accumulated in 1-, 3-, 6-, 9-, and 12-month periods. The most acute hydrological droughts in the analysed multi-annual period occurred in the years 2003– 2007.
本文介绍了1981 - 2010年德拉河流域水文干旱的演变过程。本研究利用了拉维水文站记录的拉维河日流量和两个气象站(Wierzchowo和Krzyz)的日降水量。水文干旱特征是在标准化径流指数(SRI)的基础上确定的,这是一种常用的水文干旱指数。SRI值是根据在1个月、3个月、6个月、9个月和12个月期间累积的平均每月出院量计算的。在分析的多年期中,最严重的水文干旱发生在2003 - 2007年。
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引用次数: 1
Preface of the Symposium “Traffic Infrastructure and Modelling” (TIAM-19) “交通基建与模型”研讨会前言(TIAM-19)
T. Campisi, D. Ticali, A. Deluka-Tibljaš, Sanja Šurdonja
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引用次数: 0
Preface of the International Symposium on Computer Science and Information Technology (ISCSIT 2019) 计算机科学与信息技术国际学术研讨会(ISCSIT 2019)前言
M. Kotyrba, E. Volná, V. Bradác, M. Žáček, Bogdan Walek
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引用次数: 0
Climate change driven events and projects’ vulnerability as element of the EIA procedure – Application of the IAEA STE selection criteria 气候变化驱动的事件和项目的脆弱性作为环境影响评估程序的要素——国际原子能机构STE选择标准的应用
R. Urbaniak, D. Absalon
There is a clear cause-and-effect interaction at play between environment and the project itself that acts two-way, making the project’s suitable site selection of utmost importance. As general public becomes more and more aware of environmental issues that need to be addressed in the course of licensing procedures (Environmental Impact Assessment [EIA]) many aspects that can affect a planned development’s site suitability remain hidden from the public view and yet crucial as they can determine investment’s not only impact spatial boundaries but even its viability. Determination of a planned development’s location, therefore, should be preceded by detailed siting and environmental studies completing of which guarantee removal or at least occurrence probability reduction from a financial equation of significant uncertainties that could impact an investment at either the designing or operating stage. In the paper application of conventional energy sector methodologies as well as site selection criteria of the Safety Standards, International Atomic Energy Agency [IAEA] for nuclear installations as mutually complementing tools are being discussed with a special consideration given to climatic, geological and legislative issues.There is a clear cause-and-effect interaction at play between environment and the project itself that acts two-way, making the project’s suitable site selection of utmost importance. As general public becomes more and more aware of environmental issues that need to be addressed in the course of licensing procedures (Environmental Impact Assessment [EIA]) many aspects that can affect a planned development’s site suitability remain hidden from the public view and yet crucial as they can determine investment’s not only impact spatial boundaries but even its viability. Determination of a planned development’s location, therefore, should be preceded by detailed siting and environmental studies completing of which guarantee removal or at least occurrence probability reduction from a financial equation of significant uncertainties that could impact an investment at either the designing or operating stage. In the paper application of conventional energy sector methodologies as well as site selection criteria of t...
环境与项目本身之间存在着明显的因果关系,这种关系是双向的,因此项目的选址至关重要。随着公众越来越意识到在审批过程中需要解决的环境问题(环境影响评估[EIA]),许多可能影响规划发展的场地适宜性的方面仍然隐藏在公众视野之外,但它们却至关重要,因为它们不仅可以影响空间边界,甚至可以决定投资的可行性。因此,在确定计划发展的地点之前,应先完成详细的选址和环境研究,以保证在设计或运营阶段可能影响投资的重大不确定性的财务方程式中消除或至少减少发生概率。在文件中讨论了传统能源部门方法的应用以及国际原子能机构将核设施作为相互补充的工具的安全标准的选址标准,并特别考虑到气候、地质和立法问题。环境与项目本身之间存在着明显的因果关系,这种关系是双向的,因此项目的选址至关重要。随着公众越来越意识到在审批过程中需要解决的环境问题(环境影响评估[EIA]),许多可能影响规划发展的场地适宜性的方面仍然隐藏在公众视野之外,但它们却至关重要,因为它们不仅可以影响空间边界,甚至可以决定投资的可行性。因此,在确定计划发展的地点之前,应先完成详细的选址和环境研究,以保证在设计或运营阶段可能影响投资的重大不确定性的财务方程式中消除或至少减少发生概率。本文介绍了传统的能源部门方法的应用,以及t - t的选址标准。
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引用次数: 0
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