DESIGN, CONSTRUCTION, MAINTENANCE最新文献_第3页

Cost Minimization by Lineer Shipping Transport Integration into the Supply Chain and Supplier Selection in a New Production Facility 班轮运输的成本最小化与供应链整合及新生产设施的供应商选择

DESIGN, CONSTRUCTION, MAINTENANCE Pub Date : 2022-08-02 DOI: 10.37394/232022.2022.2.30

A. Karakaya, M. Dursun, Nazli Goker

引用次数: 0

DEM Modeling and Optimization of the High Energy Ball Milling 高能球磨的DEM建模与优化

DESIGN, CONSTRUCTION, MAINTENANCE Pub Date : 2022-07-05 DOI: 10.37394/232022.2022.2.29

M. Mhadhbi

引用次数: 1

The Analysis of Freight Forwarding Services Using the Business Process Modelling Tools. Study Case in Constanta Port 基于业务流程建模工具的货运代理业务分析。康斯坦察港的研究案例

DESIGN, CONSTRUCTION, MAINTENANCE Pub Date : 2022-06-30 DOI: 10.37394/232022.2022.2.28

Ionela Goia, Alexandru-Stefan Bacioiu

引用次数: 0

Influence of Wind Angle Incidence and Architectural Elements on the External Pressure Coefficient of Hyperbolic Paraboloid Roofs 风入射角和建筑要素对双曲抛物面屋顶外压系数的影响

DESIGN, CONSTRUCTION, MAINTENANCE Pub Date : 2022-06-30 DOI: 10.37394/232022.2022.2.27

Guilherme S. Teixeira, M. de Campos

{"title":"Influence of Wind Angle Incidence and Architectural Elements on the External Pressure Coefficient of Hyperbolic Paraboloid Roofs","authors":"Guilherme S. Teixeira, M. de Campos","doi":"10.37394/232022.2022.2.27","DOIUrl":"https://doi.org/10.37394/232022.2022.2.27","url":null,"abstract":"In the study of wind loads in buildings, the aerodynamics of roofs with parabolic shapes, which cause complex pressure distributions due to their sensitivity to wind, are often omitted and neglected by several codes and norms. In this way, computer simulations are a viable and reliable alternative. Here, wind action was considered in an innovative project composed of parabolic and circumferential generatrices: the Church of Saint Francis of Assisi. Designed by Brazilian architect Oscar Niemeyer in Belo Horizonte, Brazil, two paraboloid vaults and three circular arches of reinforced concrete composed its structure. This work generated great international recognition for the architect after 1943, as the design of the roofs did not require walls. For geometry modeling, Autodesk AutoCAD software was adopted, and the models were considered in a control volume. The simulations were performed using Ansys Workbench software and the RNG K-Epsilon turbulence model. The wind speed at different heights was calculated using the Power-law approximation. A basic wind speed of 30 m/s was adopted, and the mesh used was composed of tetrahedrons. To validate the methodology, different models with hyperbolic-paraboloid roofs from the literature were considered. In addition, the visualization of the flow around the geometry from the streamlines, the wind profile, and the analysis of the isobaric lines of the external pressure coefficients for different directions of incidence and architectural elements that make up the building were presented.","PeriodicalId":443735,"journal":{"name":"DESIGN, CONSTRUCTION, MAINTENANCE","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126783583","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

Numerical Investigation of Wind Pressure Coefficients on Different Scallop Dome Configurations 扇贝圆顶不同结构风压系数的数值研究

DESIGN, CONSTRUCTION, MAINTENANCE Pub Date : 2022-06-01 DOI: 10.37394/232022.2022.2.24

Camila C. Guerra, M. de Campos

{"title":"Numerical Investigation of Wind Pressure Coefficients on Different Scallop Dome Configurations","authors":"Camila C. Guerra, M. de Campos","doi":"10.37394/232022.2022.2.24","DOIUrl":"https://doi.org/10.37394/232022.2022.2.24","url":null,"abstract":"The effects of the action of wind on scallop domes were numerically investigated using the software Ansys, as well the interference of the neighborhood on the external pressure coefficient and the streamlines between geometrically identical domes. The influence of the proportion on the neighborhood interference in scallop domes and the variations in the dimensions of the structures on the pressure coefficients and streamlines were also investigated. Five simulations were analyzed involving six-grooved domes and geometry height variations for validation. The numerically obtained coefficients were compared with values in the literature. Other applications investigated the influence of grooves on the external pressure coefficient and the effect of wind on the grooved domes. Another application analyzed the interference of the neighborhood on the external pressure coefficients and streamlines between three geometrically identical domes and, finally, the influence of the proportion in the study of the interference of the neighborhood. Here, the variations in the dimensions of the structure affected the pressure coefficients and the streamlines were analyzed. It was possible to verify the versatility and efficiency of the computational method used in the analysis of the action of wind.","PeriodicalId":443735,"journal":{"name":"DESIGN, CONSTRUCTION, MAINTENANCE","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115076780","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

Energy Consumption Dynamics and Sustainable Growth in Nigeria 尼日利亚能源消费动态与可持续增长

DESIGN, CONSTRUCTION, MAINTENANCE Pub Date : 2022-06-01 DOI: 10.37394/232022.2022.2.21

O. Okoroafor, Agbanike Tobechi Faith, Ohalete Precious Ifeanyi, Otta Nkama Nnachi, T. E. Mathew

{"title":"Energy Consumption Dynamics and Sustainable Growth in Nigeria","authors":"O. Okoroafor, Agbanike Tobechi Faith, Ohalete Precious Ifeanyi, Otta Nkama Nnachi, T. E. Mathew","doi":"10.37394/232022.2022.2.21","DOIUrl":"https://doi.org/10.37394/232022.2022.2.21","url":null,"abstract":"The paper empirically examined the energy consumption dynamics and sustainable growth in Nigeria using time series data spanning from 1980 to 2020. The major sources of data were from the World Development Index (WDI) and Central Bank of Nigeria (CBN) Statistical Bulletin various issues. In checking the stationary status of all the data engaged, the paper applied modified Ng-Perron unit root test to check the stationary properties of the series, and the results showed that GDP growth rate (GDPgr) was integrated at level (that is I(0)) while electricity consumption (ECNP), coal consumption (CCNP) and petroleum consumption (PCNP) were integrated of order one (that is, I (1)). This justified the application of Autoregressive Distributed Lag (ARDL) model of co-integration, whose results revealed that all series exhibited a stable long run relationship among them. The ARDL bound test result showed that the F-statistics was 4.35, which was greater than the upper bounds critical value of 3.79 at 5 percent level of significant. This further showed that the null hypothesis, which postulated that energy consumption dynamics has no significant impact on sustainable growth in Nigeria can be rejected. Based on the above findings, the paper submitted inter-alia that government should establish a renewable biomass as a supplement to energy sources in order to drive a sustainable growth in Nigeria.","PeriodicalId":443735,"journal":{"name":"DESIGN, CONSTRUCTION, MAINTENANCE","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129525385","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

Tool Wear Condition Monitoring Using Emitted Sound Signals By Simple Machine Learning Technique 基于简单机器学习技术的刀具磨损状态监测

DESIGN, CONSTRUCTION, MAINTENANCE Pub Date : 2022-06-01 DOI: 10.37394/232022.2022.2.22

C. L. ,. Perumal, S. B. ,. Bhadrinathan, A. Samraj

引用次数: 0

Control of Security of Cyber Train Gateway 网络列车网关的安全控制

DESIGN, CONSTRUCTION, MAINTENANCE Pub Date : 2022-06-01 DOI: 10.37394/232022.2022.2.25

J. Procházka, Petr Novobilsky, D. Procházková

{"title":"Control of Security of Cyber Train Gateway","authors":"J. Procházka, Petr Novobilsky, D. Procházková","doi":"10.37394/232022.2022.2.25","DOIUrl":"https://doi.org/10.37394/232022.2022.2.25","url":null,"abstract":"The presence of many moving elements in case of trains is the specific problem of railway transport infrastructures. The security of moving elements within the cyber-physical system (CPS) needs, therefore, to be ensured against both physical and cyber intrusion. We will deal with the cyber gateway of the train, which is called a mobile communication gateway (MCG). It is associated with problems of the standard cyber gateway and the problems specific to the moving systems. It is impossi-ble to secure communication between train and control centrum through a closed communication system only, it need to take place through open space because of extensive infrastructure with assistance of ground communication gateway (GCG). The MCG design shall ensure the security functions of the gateway as well as sufficient communication capacity. Our control over environmental conditions of MCG is limited because it is in open space, both physical and cyber, often in motion. The MCG, there-fore, needs to be able to respond dynamically to environmental changes caused by deliberate attacks or unintentional changes in the system. The ability of the adaptability must be given to the MCG in design","PeriodicalId":443735,"journal":{"name":"DESIGN, CONSTRUCTION, MAINTENANCE","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123393907","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

Computational Engineering: Mathematical Models in Heat Flow Dynamics Study 计算工程:热流动力学研究中的数学模型

DESIGN, CONSTRUCTION, MAINTENANCE Pub Date : 2022-06-01 DOI: 10.37394/232022.2022.2.23

E. Gago, Lucas I. D’alessandro, Marcelo M. Zurbriggen

引用次数: 0

Mechanical Properties of Al7075 Hybrid Metal Matrix Composites as a functionality of SiO2 % in the RHA Al7075杂化金属基复合材料在RHA中SiO2含量变化时的力学性能

DESIGN, CONSTRUCTION, MAINTENANCE Pub Date : 2022-05-11 DOI: 10.37394/232022.2022.2.19

Harish Mugutkar, N. Tamiloli, Vishaldatt V. Kohir

引用次数: 0