International Journal for Engineering Modelling最新文献_第5页

Boussinesq Modelling of Waves and Currents in the Presence of Submerged Detached/Discontinuous Breakwaters 存在水下分离/不连续防波堤时波浪和水流的Boussinesq模型

International Journal for Engineering Modelling Pub Date : 2020-12-14 DOI: 10.31534/engmod.2020.3-4.ri.03a

Mohammad Barzegar, M. Ketabdari, Kourosh Kayhan, D. Palaniappan

{"title":"Boussinesq Modelling of Waves and Currents in the Presence of Submerged Detached/Discontinuous Breakwaters","authors":"Mohammad Barzegar, M. Ketabdari, Kourosh Kayhan, D. Palaniappan","doi":"10.31534/engmod.2020.3-4.ri.03a","DOIUrl":"https://doi.org/10.31534/engmod.2020.3-4.ri.03a","url":null,"abstract":"SUMMARY The effect of beach configurations with the main focus on the detached submerged breakwater on shoreline currents is investigated numerically. The Boussinesq equations are used to model the beach with a constant slope, continuous submerged breakwater, and discontinuous/detached submerged breakwater. Our numerical simulation results show that the transient rip currents are generated near the shoreline at the beach with constant slope while the continuous submerged breakwater structure creates a calm beach area along the shoreline. The presence of the gap in submerged breakwater changes the currents along the shoreline by generating rip currents with two pairs of vortices. One pair of vorticities, located around the gap, damage the breakwater by transmitting sediments along the breakwater foundation and eroding its surface. The second pair, created near the shoreline, erodes the shoreline due to sediment transportation and leads to a dangerous and unsafe situation for swimmers. The rip current creates five main critical areas with the maximum velocity towards the shoreline and offshore. The first set of three areas (numbered 1, 2, 3) has an approximately average velocity of 1-1.25 m/s towards the shoreline. One of these areas (numbered 2) is located close to the shoreline and the other two (numbered 1 and 3) are found breakwater and the return velocity decreases for this structure. For smaller heights (d = 3.7 and 3.2) damping is nearly the same and the returning flow varies depending on the available space through the gap. Specifically, the return velocity for d = 3.7 is higher than that for d = 3.2. The numerical results presented herein suggest that aggressive rip currents are generated in the case of detached submerged breakwater beach configurations.","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44670194","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

Interfacial Bond Adhesion Enhancement Mechanism Analysis of Self Stressing Alkali Activated Slag Concrete-Filled Round Steel Tube 自应力碱活化矿渣圆钢管混凝土界面粘结增强机理分析

International Journal for Engineering Modelling Pub Date : 2020-12-14 DOI: 10.31534/engmod.2020.3-4.ri.07m

Yu Xiaohui, Li Yongqiang, Wang Shige

引用次数: 0

Structural integrity of diesel generator set subjected to dynamic loads 动力载荷作用下柴油发电机组的结构完整性

International Journal for Engineering Modelling Pub Date : 2020-12-14 DOI: 10.31534/engmod.2020.3-4.ri.01f

I. Senjanović, N. Vladimir, D. Čakmak

引用次数: 1

Method for assessing Maintenance and maintainability in residential buildings - one of the basic categories of the social aspect of sustainable construction 住宅建筑的维护和可维护性评估方法——可持续建筑社会方面的基本类别之一

International Journal for Engineering Modelling Pub Date : 2020-12-14 DOI: 10.31534/engmod.2020.3-4.ri.06m

A. Radziejowska

{"title":"Method for assessing Maintenance and maintainability in residential buildings - one of the basic categories of the social aspect of sustainable construction","authors":"A. Radziejowska","doi":"10.31534/engmod.2020.3-4.ri.06m","DOIUrl":"https://doi.org/10.31534/engmod.2020.3-4.ri.06m","url":null,"abstract":"The article presents a proposal for a method of evaluation of one of the six main categories describing the social aspect of sustainable construction, category K5 maintenance and maintainability. The selection of proper criteria for the category assessment is based, among others, on standard EN 16309+A1:2014-12. The article presents ways of assessing different characteristics by describing the category of maintenance and maintainability. Literature studies and numerous surveys are carried out in order to determine threshold values as well as the importance of the features characterizing the examined category. Then the way of obtaining an aggregated assessment of the examined category is presented. The obtained result is then compared with an identical reference object, enabling so to determine the degree of fulfilment of the social properties contained in the analysed category. Ultimately, an analogous assessment for each of the six categories describing the social aspect of sustainable construction will make it possible to determine the social quality of residential buildings and to classify them according to the characteristics studied.","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44663954","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

Automatic Reassembly Method of 3D Thin-wall Fragments Based on Derivative Dynamic Time Warping 基于导数动态时间翘曲的三维薄壁破片自动装配方法

International Journal for Engineering Modelling Pub Date : 2020-07-16 DOI: 10.31534/engmod.2020.1-2.ri.03f

Siyong Fu, Lushen Wu, Qiuxiang Tao, Ying Shen

{"title":"Automatic Reassembly Method of 3D Thin-wall Fragments Based on Derivative Dynamic Time Warping","authors":"Siyong Fu, Lushen Wu, Qiuxiang Tao, Ying Shen","doi":"10.31534/engmod.2020.1-2.ri.03f","DOIUrl":"https://doi.org/10.31534/engmod.2020.1-2.ri.03f","url":null,"abstract":"SUMMARY In order to address the automatic virtual reassembling of 3D thin-wall fragments, this paper proposes a 3D fragment reassembly method based on derivative dynamic time warping. Firstly, a calculation method of discrete curvature and torsion is designed to solve the difficulty of calculating curvature and torsion of discrete data points and eliminate effectively the noise interferences in the calculation process. Then, it takes curvature and torsion as the feature descriptors of the curve, searches the candidate matching line segments by the derivative dynamic time warping (DDTW) method with the feature descriptors, and records the positions of the starting and ending points of each candidate matching segment. After that, it designs a voting mechanism with the geometric invariant as the constraint information to select further the optimal matching line segments. Finally, it adopts the least squares method to estimate the rotation and transformation matrices and uses the iterative closest point (ICP) method to complete the reassembly of fragments. The experimental results show that the reassembly error is less than 1mm and that the reassembly effect is good. The method can solve the 3D curve matching in case there are partial feature defects, and can achieve the virtual restoration of the broken thin-wall fragment model quickly and effectively.","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49016682","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

Roger Owen – Eminent Scientist and Extraordinary Friend 罗杰欧文-杰出的科学家和非凡的朋友

International Journal for Engineering Modelling Pub Date : 2020-07-16 DOI: 10.31534/engmod.2020.1-2.ri.01p

P. Marović, M. Galić

引用次数: 1

Natural vibration analysis of pressurised and rotating toroidal shell segment by Rayleigh-Ritz method 用瑞利-里兹法分析受压旋转环面壳段的自振

International Journal for Engineering Modelling Pub Date : 2020-02-25 DOI: 10.31534/engmod.2019.2-4.ri.01f

I. Senjanovi, Neven Alujevi, Ivan, atipovi, Damjan, Akmak, Nikola, Vladimir, D. Cho

引用次数: 1

Mathematical modelling for multiproduct EPQ problem featuring delayed differentiation, expedited rate, and scrap 多产品EPQ问题的延迟微分、加速速率和报废的数学建模

International Journal for Engineering Modelling Pub Date : 2020-01-01 DOI: 10.31534/engmod.2020.3-4.ri.05v

S. Chiu, Jianwei Lin, Yunsen Wang, Hong-Dar Lin

{"title":"Mathematical modelling for multiproduct EPQ problem featuring delayed differentiation, expedited rate, and scrap","authors":"S. Chiu, Jianwei Lin, Yunsen Wang, Hong-Dar Lin","doi":"10.31534/engmod.2020.3-4.ri.05v","DOIUrl":"https://doi.org/10.31534/engmod.2020.3-4.ri.05v","url":null,"abstract":"The client requirements of present-day markets emphasize product quality, variety, and rapid response. To gain competitive advantages in marketplaces and meet customer needs, manufacturers today seek the most economical and fastest fabrication schemes and strategies to produce their various goods, especially when commonality exists within these multiple end products. Inspired by the above viewpoints, this study uses a mathematical modelling approach for solving a multiproduct economic production quantity (EPQ) problem featuring scrap, delayed differentiation, and expedited rate on the fabrication of the common part. We build a two-stage multiproduct fabrication scheme. Stage one uses an accelerated rate to produce all necessary common parts for multi-item to shorten its uptime, while stage two fabricates finished products sequentially using a rotation cycle rule. Inevitable random scraps produced in both stages are identified and removed to achieve the anticipated quality. We determined the optimal cost-minimization operating cycle length and used a numerical example to show our model’s capability and to explore collective and individual impacts of scrap, expedited-rate, and postponement strategies on various performances of the studied problem (such as uptime of common part, utilization, rotation cycle time, total system cost, and individual cost contributor, etc.) Our model can offer an optimization solution and in-depth managerial insights for fabrication and operations planning in a wide variety of present-day industries, such as household goods, clothing, etc.","PeriodicalId":35748,"journal":{"name":"International Journal for Engineering Modelling","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69997574","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

Offloading Decision Algorithm Based on Distance Weighted K-Nearest Neighbor in Power Internet of Things 电力物联网中基于距离加权k近邻的卸载决策算法

International Journal for Engineering Modelling Pub Date : 2020-01-01 DOI: 10.31534/engmod.2020.3-4.ri.04d

Jun Jia, Jiangtao Xu, Wenqing Cui, Fengbo Tao, Guojiang Zhang, Chengbo, Hu, Zhaohui Zhang, Ziquan Liu

引用次数: 0

Effect of Environmental Conditions and Training Algorithms on the Efficiency of a NARX Based Approach to Predict PV Panel Power Output 环境条件和训练算法对基于NARX的光伏板输出预测方法效率的影响

International Journal for Engineering Modelling Pub Date : 2020-01-01 DOI: 10.31534/engmod.2020.3-4.ri.02f

Toufik Sebbagh, Ridha Kelaiaia, A. Kerboua, Abderrazak Metatla, A. Zaatri

引用次数: 1