Pub Date : 2015-08-13DOI: 10.1504/IJMSI.2015.071113
Milani S. Sumanasooriya, Omkar Deo, Benjamin Rehder, N. Neithalath
Pervious concrete is one of the relatively recent additions to the class of sustainable multifunctional cement-based materials. The material design of pervious concretes relies on trial-and-error-based approaches since the larger porosity and pore size requirements make a minimal porosity-based approach adopted for conventional concretes non-viable. This paper reviews a particle packing-based methodology for pervious concrete material design using a compaction index from compressible packing model of granular particles as the defining parameter. The pore structure features of the thus designed pervious concretes are characterised using well-accepted stereological and morphological methods. A three-dimensional reconstruction procedure, from two-dimensional starting images, used to develop material structures in which performance (permeability) prediction algorithms can be implemented is also reviewed. Permeability of these model structures have been predicted using a Stokes' solver and a Lattice Boltzmann scheme, and compared to the experimentally determined permeability. A stochastic Monte-Carlo simulation is used to quantify the influence of pore structure features on the permeability of pervious concretes.
{"title":"A review of materials science-based models for mixture design and permeability prediction of pervious concretes","authors":"Milani S. Sumanasooriya, Omkar Deo, Benjamin Rehder, N. Neithalath","doi":"10.1504/IJMSI.2015.071113","DOIUrl":"https://doi.org/10.1504/IJMSI.2015.071113","url":null,"abstract":"Pervious concrete is one of the relatively recent additions to the class of sustainable multifunctional cement-based materials. The material design of pervious concretes relies on trial-and-error-based approaches since the larger porosity and pore size requirements make a minimal porosity-based approach adopted for conventional concretes non-viable. This paper reviews a particle packing-based methodology for pervious concrete material design using a compaction index from compressible packing model of granular particles as the defining parameter. The pore structure features of the thus designed pervious concretes are characterised using well-accepted stereological and morphological methods. A three-dimensional reconstruction procedure, from two-dimensional starting images, used to develop material structures in which performance (permeability) prediction algorithms can be implemented is also reviewed. Permeability of these model structures have been predicted using a Stokes' solver and a Lattice Boltzmann scheme, and compared to the experimentally determined permeability. A stochastic Monte-Carlo simulation is used to quantify the influence of pore structure features on the permeability of pervious concretes.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"22 1","pages":"108-130"},"PeriodicalIF":0.0,"publicationDate":"2015-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJMSI.2015.071113","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66767824","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}
Pub Date : 2015-08-13DOI: 10.1504/IJMSI.2015.071109
Bin Zhang, Zeynep Basaran Bundur, P. Mondal, R. Ferron
Recently, interest has focused on leveraging the biological functions of microorganisms to develop smart cement-based materials. This paper provides an overview of the calcium carbonate biomineralisation process in nature and presents a review of the work conducted by various groups around the world on biogenic calcium carbonate formation as it relates to the hydration, microstructure, properties, and performance of cement-based materials. Promises and concerns of applying biomineralisation in cement-based materials are also discussed, and directions for future research are explored.
{"title":"Use of biomineralisation in developing smart concrete inspired by nature","authors":"Bin Zhang, Zeynep Basaran Bundur, P. Mondal, R. Ferron","doi":"10.1504/IJMSI.2015.071109","DOIUrl":"https://doi.org/10.1504/IJMSI.2015.071109","url":null,"abstract":"Recently, interest has focused on leveraging the biological functions of microorganisms to develop smart cement-based materials. This paper provides an overview of the calcium carbonate biomineralisation process in nature and presents a review of the work conducted by various groups around the world on biogenic calcium carbonate formation as it relates to the hydration, microstructure, properties, and performance of cement-based materials. Promises and concerns of applying biomineralisation in cement-based materials are also discussed, and directions for future research are explored.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"9 1","pages":"39-60"},"PeriodicalIF":0.0,"publicationDate":"2015-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJMSI.2015.071109","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66767615","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}
Pub Date : 2015-08-13DOI: 10.1504/ijmsi.2015.071114
Ping Yang, Yang Wang, Lin Deng
Electronic packaging is a critical part of products such as computers, smart phones, automotive components and other electronic devices. Along with the development of society and economy, the demand for electronic devices and its quality has increased rapidly in recent years. Thus, it is necessary to research the reliability of electronic packaging. This paper presents a review of recent investigations on the reliability of electronic packaging components. The dynamic characteristics and fatigue test under different loading conditions are discussed, including vibration loading, thermal loading and combined loading. Finite element method (FEM) is used frequently in the studies as well as experimental test. Finally, it is significant to emphasise the importance of electronic packaging.
{"title":"A review on reliability of electronic packaging in micro/nano manufacturing","authors":"Ping Yang, Yang Wang, Lin Deng","doi":"10.1504/ijmsi.2015.071114","DOIUrl":"https://doi.org/10.1504/ijmsi.2015.071114","url":null,"abstract":"Electronic packaging is a critical part of products such as computers, smart phones, automotive components and other electronic devices. Along with the development of society and economy, the demand for electronic devices and its quality has increased rapidly in recent years. Thus, it is necessary to research the reliability of electronic packaging. This paper presents a review of recent investigations on the reliability of electronic packaging components. The dynamic characteristics and fatigue test under different loading conditions are discussed, including vibration loading, thermal loading and combined loading. Finite element method (FEM) is used frequently in the studies as well as experimental test. Finally, it is significant to emphasise the importance of electronic packaging.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/ijmsi.2015.071114","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66767835","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}
Pub Date : 2015-08-13DOI: 10.1504/IJMSI.2015.071108
Y. Shao, A. Zhou, Mehrdad Mahoutian
Concrete demonstrates the capacity to absorb carbon dioxide. The reaction between concrete and carbon dioxide accelerates concrete curing at early age and converts CO2 into calcium carbonate for carbon storage. As-captured flue gas without recovery can be directly used in this application. Because of low CO2 concentration in flue gas, a pseudo-dynamic carbonation process was developed with multiple injection and releasing cycles. The effect of process parameters on carbon uptake and strength gain was examined. It was found that, with a flue gas of 25% CO2 concentration and 2-hour carbonation, cement paste could uptake CO2 of 8-11% based on cement content in immediate carbonation and concrete could absorb CO2 at 7-9% after 18-hour initial curing. The maximum possible carbon uptake from flue gas carbonation was also determined. It was about 15-17% based on cement mass. While immediate carbonation could significantly enhance the early strength, carbonation after initial curing did not improve significantly the late strength.
{"title":"Pseudo-dynamic carbonation for concrete curing and carbon storage","authors":"Y. Shao, A. Zhou, Mehrdad Mahoutian","doi":"10.1504/IJMSI.2015.071108","DOIUrl":"https://doi.org/10.1504/IJMSI.2015.071108","url":null,"abstract":"Concrete demonstrates the capacity to absorb carbon dioxide. The reaction between concrete and carbon dioxide accelerates concrete curing at early age and converts CO2 into calcium carbonate for carbon storage. As-captured flue gas without recovery can be directly used in this application. Because of low CO2 concentration in flue gas, a pseudo-dynamic carbonation process was developed with multiple injection and releasing cycles. The effect of process parameters on carbon uptake and strength gain was examined. It was found that, with a flue gas of 25% CO2 concentration and 2-hour carbonation, cement paste could uptake CO2 of 8-11% based on cement content in immediate carbonation and concrete could absorb CO2 at 7-9% after 18-hour initial curing. The maximum possible carbon uptake from flue gas carbonation was also determined. It was about 15-17% based on cement mass. While immediate carbonation could significantly enhance the early strength, carbonation after initial curing did not improve significantly the late strength.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJMSI.2015.071108","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66767604","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}
Pub Date : 2015-08-13DOI: 10.1504/ijmsi.2015.071119
Jianwei Wu, Fuyun Liu, Deng Yong, Gan Lin
To overcome the lack of algorithms and programs in the literature about the principal moment of inertia and Euler angles of the centre inertia principal axis system for the closest to the original coordinates, the theories and methods of linear algebra are applied to transform of the inertia matrix between coordinate systems. The algorithms are designed to solve Euler angles on the centre inertia principal axis of the closest to the original coordinate system according to the definition of direction cosine matrix. Lastly, calculation program is developed using the algorithms based on MATLAB. Compared with ADAMS, the program by using the algorithms gets the same results with ADAMS, which verified the correctness and effectiveness of the algorithms. It is the important requisites in the torque roll axis decoupling to obtain an accurate main moment of inertia and the centre inertia principal axis.
{"title":"Calculation of the principal moment of inertia and Euler angles of the centre inertia principal axis system: design and implementation of the algorithm","authors":"Jianwei Wu, Fuyun Liu, Deng Yong, Gan Lin","doi":"10.1504/ijmsi.2015.071119","DOIUrl":"https://doi.org/10.1504/ijmsi.2015.071119","url":null,"abstract":"To overcome the lack of algorithms and programs in the literature about the principal moment of inertia and Euler angles of the centre inertia principal axis system for the closest to the original coordinates, the theories and methods of linear algebra are applied to transform of the inertia matrix between coordinate systems. The algorithms are designed to solve Euler angles on the centre inertia principal axis of the closest to the original coordinate system according to the definition of direction cosine matrix. Lastly, calculation program is developed using the algorithms based on MATLAB. Compared with ADAMS, the program by using the algorithms gets the same results with ADAMS, which verified the correctness and effectiveness of the algorithms. It is the important requisites in the torque roll axis decoupling to obtain an accurate main moment of inertia and the centre inertia principal axis.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/ijmsi.2015.071119","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66767909","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}
Pub Date : 2015-08-13DOI: 10.1504/ijmsi.2015.071116
Zutao Gou, Lin Deng, Ping Yang
To analyse the electronic, optical and magnetic properties of Fe doped ZnO and (Fe, Al) co-doped ZnO, we investigated the parameters of the electronic structure, the density of states (DOS), the spatial spin density distribution, the absorption spectrum and the reflectivity spectrum by using first-principles based on density functional theory (DFT). It is found that the lattice constants of Fe doped ZnO and (Fe, Al) co-doped ZnO are changed owing to different ionic radii of Fe ion and Al ion substituted in the ZnO lattice. The electronic conductivity of (Fe, Al) co-doped ZnO is better than that of Fe doped ZnO because of doping Al. Al ion does not directly make contribution to magnetic moment. However, Al ion influences other ions and then influences magnetic moment indirectly. Meanwhile, with doping Al, the absorption edge and the reflectivity edge move to high-energy direction and show a blue shift, and the absorption spectrum peak and the reflectivity spectrum peak become lower.
{"title":"The electronic, optical and magnetic properties of Fe doped ZnO and (Fe, Al) co-doped ZnO from first-principles calculations","authors":"Zutao Gou, Lin Deng, Ping Yang","doi":"10.1504/ijmsi.2015.071116","DOIUrl":"https://doi.org/10.1504/ijmsi.2015.071116","url":null,"abstract":"To analyse the electronic, optical and magnetic properties of Fe doped ZnO and (Fe, Al) co-doped ZnO, we investigated the parameters of the electronic structure, the density of states (DOS), the spatial spin density distribution, the absorption spectrum and the reflectivity spectrum by using first-principles based on density functional theory (DFT). It is found that the lattice constants of Fe doped ZnO and (Fe, Al) co-doped ZnO are changed owing to different ionic radii of Fe ion and Al ion substituted in the ZnO lattice. The electronic conductivity of (Fe, Al) co-doped ZnO is better than that of Fe doped ZnO because of doping Al. Al ion does not directly make contribution to magnetic moment. However, Al ion influences other ions and then influences magnetic moment indirectly. Meanwhile, with doping Al, the absorption edge and the reflectivity edge move to high-energy direction and show a blue shift, and the absorption spectrum peak and the reflectivity spectrum peak become lower.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/ijmsi.2015.071116","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66767847","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}
Pub Date : 2015-08-13DOI: 10.1504/IJMSI.2015.071107
J. Weiss, M. Geiker, K. K. Hansen
Cracks can alter the rate of fluid transport in concrete. Unfortunately, however, quantitative information is lacking to provide definitive statements regarding the extent to which cracks reduce durability or long-term performance. This paper describes a study that used X-ray transmission/attenuation to determine the influence of cracking on the absorption of fluid in concrete. Specifically, an experimental method is presented which uses a wedge splitting test to pre-crack specimens. These pre-cracked specimens were dried and ponded with water. At various times after the start of water ponding, X-ray attenuation measurements were taken using a grid of points around the crack. By repeating this measurement and comparing the change in X-ray transmission/attenuation, the ingress of the fluid could be determined by locating the position of the moisture front. An approach is presented to determine the geometry of the crack by using water absorption perimeter measurements of the wetting front in the concrete.
{"title":"Using X-ray transmission/attenuation to quantify fluid absorption in cracked concrete","authors":"J. Weiss, M. Geiker, K. K. Hansen","doi":"10.1504/IJMSI.2015.071107","DOIUrl":"https://doi.org/10.1504/IJMSI.2015.071107","url":null,"abstract":"Cracks can alter the rate of fluid transport in concrete. Unfortunately, however, quantitative information is lacking to provide definitive statements regarding the extent to which cracks reduce durability or long-term performance. This paper describes a study that used X-ray transmission/attenuation to determine the influence of cracking on the absorption of fluid in concrete. Specifically, an experimental method is presented which uses a wedge splitting test to pre-crack specimens. These pre-cracked specimens were dried and ponded with water. At various times after the start of water ponding, X-ray attenuation measurements were taken using a grid of points around the crack. By repeating this measurement and comparing the change in X-ray transmission/attenuation, the ingress of the fluid could be determined by locating the position of the moisture front. An approach is presented to determine the geometry of the crack by using water absorption perimeter measurements of the wetting front in the concrete.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"9 1","pages":"3-20"},"PeriodicalIF":0.0,"publicationDate":"2015-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJMSI.2015.071107","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66767590","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}
Pub Date : 2015-08-13DOI: 10.1504/ijmsi.2015.071111
L. Ferrara
Incorporating fibres into cementitious composites with adapted rheology can lead, thanks to the elimination of vibration and to the rheological stability of the matrix, to a randomly uniform dispersion of fibres within structural elements. Moreover, through a suitably balanced performance of the fluid mixture, fibres can be effectively aligned along the casting-flow direction. This highlights the need, in promoting high end engineering applications of fibre reinforced cementitious composites, of designing not only the material for the performance required by the intended structural application but also the casting process which allows to obtain, e.g., the required, or most suitable, alignment of fibres, e.g., as close as possible with the direction of principal tensile stresses within the element when in service. These companion papers will review the major research results by the author with reference to the topic described above.
{"title":"Tailoring the orientation of fibres in high performance fibre reinforced cementitious composites: part 1 - experimental evidence, monitoring and prediction","authors":"L. Ferrara","doi":"10.1504/ijmsi.2015.071111","DOIUrl":"https://doi.org/10.1504/ijmsi.2015.071111","url":null,"abstract":"Incorporating fibres into cementitious composites with adapted rheology can lead, thanks to the elimination of vibration and to the rheological stability of the matrix, to a randomly uniform dispersion of fibres within structural elements. Moreover, through a suitably balanced performance of the fluid mixture, fibres can be effectively aligned along the casting-flow direction. This highlights the need, in promoting high end engineering applications of fibre reinforced cementitious composites, of designing not only the material for the performance required by the intended structural application but also the casting process which allows to obtain, e.g., the required, or most suitable, alignment of fibres, e.g., as close as possible with the direction of principal tensile stresses within the element when in service. These companion papers will review the major research results by the author with reference to the topic described above.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/ijmsi.2015.071111","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66767213","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}
Pub Date : 2015-08-13DOI: 10.1504/ijmsi.2015.071112
L. Ferrara
Incorporating fibres into a matrix with adapted rheology can lead, thanks to the elimination of vibration and to the rheological stability of the same matrix, to a randomly uniform dispersion of fibres within structural elements. It has also been recently recognised that, through a suitably balanced performance of the fluid mixture, fibres can be effectively aligned along the casting-flow direction. This highlights the need, in promoting high end engineering applications of advanced fibre reinforced cementitious composites, of designing the material for the performance required by the intended structural application. Furthermore, the casting process can be tailored to obtain, e.g., the required, or most suitable, alignment of fibres, e.g., as close as possible with the direction of principal tensile stresses within the element when in service. In part 1 of this paper, the experimental evidence was revision of a flow induced orientation of fibres in highly flowable FRCCs, the mechanisms of orientation of fibres in a yield stress fluid flow and the most recent developments in the field of predictive modelling and non-destructive monitoring of fibre dispersion. This second part of the companion paper will highlight the outcomes of the aforementioned phenomena in terms of structural design of engineering applications.
{"title":"Tailoring the orientation of fibres in high performance fibre reinforced cementitious composites: part 2 - correlation to mechanical properties and design implications","authors":"L. Ferrara","doi":"10.1504/ijmsi.2015.071112","DOIUrl":"https://doi.org/10.1504/ijmsi.2015.071112","url":null,"abstract":"Incorporating fibres into a matrix with adapted rheology can lead, thanks to the elimination of vibration and to the rheological stability of the same matrix, to a randomly uniform dispersion of fibres within structural elements. It has also been recently recognised that, through a suitably balanced performance of the fluid mixture, fibres can be effectively aligned along the casting-flow direction. This highlights the need, in promoting high end engineering applications of advanced fibre reinforced cementitious composites, of designing the material for the performance required by the intended structural application. Furthermore, the casting process can be tailored to obtain, e.g., the required, or most suitable, alignment of fibres, e.g., as close as possible with the direction of principal tensile stresses within the element when in service. In part 1 of this paper, the experimental evidence was revision of a flow induced orientation of fibres in highly flowable FRCCs, the mechanisms of orientation of fibres in a yield stress fluid flow and the most recent developments in the field of predictive modelling and non-destructive monitoring of fibre dispersion. This second part of the companion paper will highlight the outcomes of the aforementioned phenomena in terms of structural design of engineering applications.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/ijmsi.2015.071112","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66767820","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}
Pub Date : 2015-08-13DOI: 10.1504/IJMSI.2015.071117
Yi-nan Guo, Hui Li
The large-scale rectangular packing problem is a typical combinatorial optimisation problem, which belongs to the most complicated NP-complete problem. Now, it is very difficult to obtain the best solution within a certain time by the commonly used theories and methods of calculation. The ant colony algorithm, developed in recent years, is very effective in solving combinatorial optimisation and NP-problems. Based on the analysis of ant colony algorithm and the rectangular packing problem, this paper combine the ant colony algorithm and rectangular packing problem, the best-worst ant model is built and then simulated, finally, an example is used to prove the effectiveness of the proposed algorithm.
{"title":"Investigation on the rectangular packing problem based on the ant colony algorithm","authors":"Yi-nan Guo, Hui Li","doi":"10.1504/IJMSI.2015.071117","DOIUrl":"https://doi.org/10.1504/IJMSI.2015.071117","url":null,"abstract":"The large-scale rectangular packing problem is a typical combinatorial optimisation problem, which belongs to the most complicated NP-complete problem. Now, it is very difficult to obtain the best solution within a certain time by the commonly used theories and methods of calculation. The ant colony algorithm, developed in recent years, is very effective in solving combinatorial optimisation and NP-problems. Based on the analysis of ant colony algorithm and the rectangular packing problem, this paper combine the ant colony algorithm and rectangular packing problem, the best-worst ant model is built and then simulated, finally, an example is used to prove the effectiveness of the proposed algorithm.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJMSI.2015.071117","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66767852","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}
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