Allocating the resources efficiently in cloud computing environment is not only an important issue and but also a research focus. A strategy of resource allocation and price adjustment based on particle swarm algorithm is proposed in this paper. According to the workload characteristics, a utility function is designed to evaluate QoS. According to the resource demand from all workloads, the resource prices are dynamically adjusted by the corresponding resource agents in order to obtain maximum profits for each workload. The results of the simulation experiment show that our strategy has effectiveness and robustness.
{"title":"A Resource Allocation Strategy Based on Particle Swarm Algorithm in Cloud Computing Environment","authors":"Fu Xie, Y. Du, Hongwei Tian","doi":"10.1109/ICDMA.2013.18","DOIUrl":"https://doi.org/10.1109/ICDMA.2013.18","url":null,"abstract":"Allocating the resources efficiently in cloud computing environment is not only an important issue and but also a research focus. A strategy of resource allocation and price adjustment based on particle swarm algorithm is proposed in this paper. According to the workload characteristics, a utility function is designed to evaluate QoS. According to the resource demand from all workloads, the resource prices are dynamically adjusted by the corresponding resource agents in order to obtain maximum profits for each workload. The results of the simulation experiment show that our strategy has effectiveness and robustness.","PeriodicalId":403312,"journal":{"name":"2013 Fourth International Conference on Digital Manufacturing & Automation","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125898387","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}
Reinforced flexible structure, suitable for large deformation, in high grade highway bridge and road junction wide application. Most current engineering construction before, and not to the structure stress and deformation prediction effectively, put forward the construction of guidance. In this paper, ANSYS finite element software, the introduction of contact element, through to the plane strain problems and 3 d entity simulation and practical engineering data collection, in view of the abutment force and deformation, reinforced abutment design and construction to provide the guidance.
{"title":"Reinforced Abutment Stress and Deformation Analysis","authors":"Meng Xiangzhu","doi":"10.1109/ICDMA.2013.230","DOIUrl":"https://doi.org/10.1109/ICDMA.2013.230","url":null,"abstract":"Reinforced flexible structure, suitable for large deformation, in high grade highway bridge and road junction wide application. Most current engineering construction before, and not to the structure stress and deformation prediction effectively, put forward the construction of guidance. In this paper, ANSYS finite element software, the introduction of contact element, through to the plane strain problems and 3 d entity simulation and practical engineering data collection, in view of the abutment force and deformation, reinforced abutment design and construction to provide the guidance.","PeriodicalId":403312,"journal":{"name":"2013 Fourth International Conference on Digital Manufacturing & Automation","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126039952","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}
By the finite element method, blasting vibration about deep roadway is simulated in the blast driving process. By regression analysis about the effective stress peak value of the element the results show that the numerical simulation not only reveals the situation of blasting in rock roadway but also shows surrounding loose scope. By detecting instrument of the sonic wave, the change law of loose circle is obtained under dynamic loading of tunnel blasting around the ahead of tunneling in coal mining. Result of the simulation is agreement with the result of the experiment, which provides theory base for the choice of blasting parameter in soft rock driving. That has engineering significance to the blasting driving construction and supporting design.
{"title":"Numerical Simulation and Experimental Analysis of Roadway Surrounding Rock Loose Circle under Blasting Vibration","authors":"Xia Hong-bing, X. Ying, Zhang Yi-jun","doi":"10.1109/ICDMA.2013.201","DOIUrl":"https://doi.org/10.1109/ICDMA.2013.201","url":null,"abstract":"By the finite element method, blasting vibration about deep roadway is simulated in the blast driving process. By regression analysis about the effective stress peak value of the element the results show that the numerical simulation not only reveals the situation of blasting in rock roadway but also shows surrounding loose scope. By detecting instrument of the sonic wave, the change law of loose circle is obtained under dynamic loading of tunnel blasting around the ahead of tunneling in coal mining. Result of the simulation is agreement with the result of the experiment, which provides theory base for the choice of blasting parameter in soft rock driving. That has engineering significance to the blasting driving construction and supporting design.","PeriodicalId":403312,"journal":{"name":"2013 Fourth International Conference on Digital Manufacturing & Automation","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123759149","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}
According to the distribution of faults in coal face, deep-hole loose blasting scheme is formulated and vibration monitoring is conducted. Obtained seismic wave attenuation rule of deep-hole loose blasting, HHT method is adopted for vibration signal decomposition to research the characteristic of spectrum and the energy distribution of the signal. Research results show that seismic wave propagation characteristic of deep-hole loose blasting accords with hard rock spread rule in Safety Regulation for Blasting, the linear component of the ligature between survey point and explosion source is the largest in the three direction components of vibration velocity, which is resulted from the difference of energy loss between different kinds of seismic wave in propagation process, the duration of blasting vibration is about 150 ms, main energy is concentrated in the low-frequency area of less than 100 Hz, and energy can be divided into several "sub-bands" with frequency distribution. According to attenuation law, the biggest single shot charge of deep-hole loose blasting in the site can be calculated inversely, and measures for reducing blasting seismic hazard in construction are proposed, which would provide a reference for the construction.
{"title":"Study on Seismic Wave Propagation Characteristic of Deep-Hole Loose Blasting in Coal Mine","authors":"Xia Hong-bing, X. Ying, Wang Hai-bo","doi":"10.1109/ICDMA.2013.307","DOIUrl":"https://doi.org/10.1109/ICDMA.2013.307","url":null,"abstract":"According to the distribution of faults in coal face, deep-hole loose blasting scheme is formulated and vibration monitoring is conducted. Obtained seismic wave attenuation rule of deep-hole loose blasting, HHT method is adopted for vibration signal decomposition to research the characteristic of spectrum and the energy distribution of the signal. Research results show that seismic wave propagation characteristic of deep-hole loose blasting accords with hard rock spread rule in Safety Regulation for Blasting, the linear component of the ligature between survey point and explosion source is the largest in the three direction components of vibration velocity, which is resulted from the difference of energy loss between different kinds of seismic wave in propagation process, the duration of blasting vibration is about 150 ms, main energy is concentrated in the low-frequency area of less than 100 Hz, and energy can be divided into several \"sub-bands\" with frequency distribution. According to attenuation law, the biggest single shot charge of deep-hole loose blasting in the site can be calculated inversely, and measures for reducing blasting seismic hazard in construction are proposed, which would provide a reference for the construction.","PeriodicalId":403312,"journal":{"name":"2013 Fourth International Conference on Digital Manufacturing & Automation","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126642617","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}
This paper presents the results on a study to use recycle paper sludge for fiberboards production. 20-40 mesh paper sludge fiberboard and unclassified paper sludge fiberboard were fabricated. Four factors, panel density, adhesive content, pressing temperature and time, were used. The bending strength, internal bonding and thickness swelling were investigated. The results indicated that the mechanical properties of the boards were positive affected by the panel density. The 20-40 mesh paper sludge fiberboards gave superior internal bonding and thickness swelling than the unclassified paper sludge fiberboards. The bending strengths of the unclassified paper sludge fiberboards were much more than those of 20-40 mesh paper sludge fiberboards. The internal bonding and thickness swelling of all type fiberboards satisfied fully the requirements set by GB/T11718-2009 standard.
{"title":"Characteristics of Fiberboard Manufactured from Recycle Paper Sludge","authors":"Chuangui Wang, Shuangyan Zhang, Huihui Dong, Heng Wu","doi":"10.1109/ICDMA.2013.82","DOIUrl":"https://doi.org/10.1109/ICDMA.2013.82","url":null,"abstract":"This paper presents the results on a study to use recycle paper sludge for fiberboards production. 20-40 mesh paper sludge fiberboard and unclassified paper sludge fiberboard were fabricated. Four factors, panel density, adhesive content, pressing temperature and time, were used. The bending strength, internal bonding and thickness swelling were investigated. The results indicated that the mechanical properties of the boards were positive affected by the panel density. The 20-40 mesh paper sludge fiberboards gave superior internal bonding and thickness swelling than the unclassified paper sludge fiberboards. The bending strengths of the unclassified paper sludge fiberboards were much more than those of 20-40 mesh paper sludge fiberboards. The internal bonding and thickness swelling of all type fiberboards satisfied fully the requirements set by GB/T11718-2009 standard.","PeriodicalId":403312,"journal":{"name":"2013 Fourth International Conference on Digital Manufacturing & Automation","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127009619","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}
The firefly algorithm (FA) is a novel metaheuristic algorithm inspired by the social behavior of fireflies and the phenomenon of bioluminescent communication. The effects of the major parameters on FA were systematically investigated based on some benchmark functions. The step size factor, absorption coefficient and population size all have significant impact on the performance of FA. The absorption coefficient and step size factor have optimal values in practical application, and improper choice of these factors will lead to bad results. Increasing population size can improve the solution quality, although the computing time will be longer. In this paper, the characteristics of FA parameters are discribed and guidelines for determining parameter values are given.
{"title":"Optimal Choice of Parameters for Firefly Algorithm","authors":"Yuan-bin Mo, Yan-zhui Ma, Qiao-yan Zheng","doi":"10.1109/ICDMA.2013.210","DOIUrl":"https://doi.org/10.1109/ICDMA.2013.210","url":null,"abstract":"The firefly algorithm (FA) is a novel metaheuristic algorithm inspired by the social behavior of fireflies and the phenomenon of bioluminescent communication. The effects of the major parameters on FA were systematically investigated based on some benchmark functions. The step size factor, absorption coefficient and population size all have significant impact on the performance of FA. The absorption coefficient and step size factor have optimal values in practical application, and improper choice of these factors will lead to bad results. Increasing population size can improve the solution quality, although the computing time will be longer. In this paper, the characteristics of FA parameters are discribed and guidelines for determining parameter values are given.","PeriodicalId":403312,"journal":{"name":"2013 Fourth International Conference on Digital Manufacturing & Automation","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115110351","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}
The undergraduate mentorship evaluation is the key of booting the implement of undergraduate mentorship system in colleges, and of cultivating innovative practice talents. This paper, through analyzing the existing problems in current undergraduate mentorship system, constructs the evaluation indicators system of undergraduate mentorship from five aspects, which are personal quality, working attitude, mentoring method, mentorship effect, and student evaluation. By applying the Fuzzy Comprehensive Assessment Method, we quantify the evaluation indicators of undergraduate mentorship so as to make the evaluation more scientific and rational.
{"title":"The Study of Undergraduate Mentorship System Based on the Fuzzy Comprehensive Assessment Method","authors":"Xinqiao Xiao","doi":"10.1109/ICDMA.2013.377","DOIUrl":"https://doi.org/10.1109/ICDMA.2013.377","url":null,"abstract":"The undergraduate mentorship evaluation is the key of booting the implement of undergraduate mentorship system in colleges, and of cultivating innovative practice talents. This paper, through analyzing the existing problems in current undergraduate mentorship system, constructs the evaluation indicators system of undergraduate mentorship from five aspects, which are personal quality, working attitude, mentoring method, mentorship effect, and student evaluation. By applying the Fuzzy Comprehensive Assessment Method, we quantify the evaluation indicators of undergraduate mentorship so as to make the evaluation more scientific and rational.","PeriodicalId":403312,"journal":{"name":"2013 Fourth International Conference on Digital Manufacturing & Automation","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116103532","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}
Because of large amounts of heat generation, rolling bearings of heavy load and high speed can have a severe effect on the temperature field of the whole transmission system. Meanwhile, the excessive deformation caused by high temperature can badly affect the bearings' working reliability and lifetime. With the theory of friction and thermal conduction, heat flux and heat transfer coefficient for different areas of the bearing are precisely calculated. The three-dimensional finite model of the bearing is built up in ANSYS, and the steady temperature field is obtained, which provides the basis for thermal deformation of the bearing. The effect of different speeds and radial forces on the steady temperature field is also analyzed.
{"title":"The Steady Temperature Field Analysis of the High Speed Rolling Bearing","authors":"Fu Tao, Liu Shaojun, Peng Jie","doi":"10.1109/ICDMA.2013.374","DOIUrl":"https://doi.org/10.1109/ICDMA.2013.374","url":null,"abstract":"Because of large amounts of heat generation, rolling bearings of heavy load and high speed can have a severe effect on the temperature field of the whole transmission system. Meanwhile, the excessive deformation caused by high temperature can badly affect the bearings' working reliability and lifetime. With the theory of friction and thermal conduction, heat flux and heat transfer coefficient for different areas of the bearing are precisely calculated. The three-dimensional finite model of the bearing is built up in ANSYS, and the steady temperature field is obtained, which provides the basis for thermal deformation of the bearing. The effect of different speeds and radial forces on the steady temperature field is also analyzed.","PeriodicalId":403312,"journal":{"name":"2013 Fourth International Conference on Digital Manufacturing & Automation","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122398513","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}
The space grid structure is one of styles in largespace buildings. The damage analysis of space grid structure is an important part for repairing and strengthening after fire. A practical engineering was taken as the research object, and the development of members' plastic strain during fire was studied by using ABAQUS. In addition, the paper defines three damage indexes D1, D2 and D3, which were calculated based on equivalent plastic strain, displacement and the equivalent displacement separately. Through comparing the analysis results with the evaluation in the field after fire, the results show that D3 is better to judge the damage of structures after fire.
{"title":"Study on Damage Diagnosis of Steel Grid Structure after Fire","authors":"Jie Zeng, Yuanqing Zhang, Dongdong Liu, Guohua Li","doi":"10.1109/ICDMA.2013.299","DOIUrl":"https://doi.org/10.1109/ICDMA.2013.299","url":null,"abstract":"The space grid structure is one of styles in largespace buildings. The damage analysis of space grid structure is an important part for repairing and strengthening after fire. A practical engineering was taken as the research object, and the development of members' plastic strain during fire was studied by using ABAQUS. In addition, the paper defines three damage indexes D1, D2 and D3, which were calculated based on equivalent plastic strain, displacement and the equivalent displacement separately. Through comparing the analysis results with the evaluation in the field after fire, the results show that D3 is better to judge the damage of structures after fire.","PeriodicalId":403312,"journal":{"name":"2013 Fourth International Conference on Digital Manufacturing & Automation","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122960576","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}
Deep geological disposal is an internationally accepted way to deal with high-level radioactive waste. A better understanding of mechanical characteristics of host rock is very important for the stability of underground excavation and its long-term safety during operation. In the present study, tests have been performed using a true triaxial rock test system in combination with acoustic emission monitoring technique to investigate the rockburst process of the Beishan granite under the instantaneous unloading condition. When the rock specimen is loaded in three directions, the minimum principal stress in one direction is unloaded suddenly and the intermediate principal stress is kept constant and subsequently the maximum principal stress is increased. The rockburst phenomenon is successfully simulated in the laboratory. The experimental results show that occurrence of rockburst is attributed to the gradual energy accumulation and sudden energy release in the rock. This study provides an experimental basis for further investigating the influence of rock mechanics properties on underground construction and safe assessment in the Beishan area.
{"title":"Rockburst Behaviors of Beishan Granite Subjected to Instantaneous Unloading","authors":"Zhao Xing-guang, Ma Li-ke, Su Rui","doi":"10.1109/ICDMA.2013.278","DOIUrl":"https://doi.org/10.1109/ICDMA.2013.278","url":null,"abstract":"Deep geological disposal is an internationally accepted way to deal with high-level radioactive waste. A better understanding of mechanical characteristics of host rock is very important for the stability of underground excavation and its long-term safety during operation. In the present study, tests have been performed using a true triaxial rock test system in combination with acoustic emission monitoring technique to investigate the rockburst process of the Beishan granite under the instantaneous unloading condition. When the rock specimen is loaded in three directions, the minimum principal stress in one direction is unloaded suddenly and the intermediate principal stress is kept constant and subsequently the maximum principal stress is increased. The rockburst phenomenon is successfully simulated in the laboratory. The experimental results show that occurrence of rockburst is attributed to the gradual energy accumulation and sudden energy release in the rock. This study provides an experimental basis for further investigating the influence of rock mechanics properties on underground construction and safe assessment in the Beishan area.","PeriodicalId":403312,"journal":{"name":"2013 Fourth International Conference on Digital Manufacturing & Automation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122172407","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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