Pub Date : 2015-01-01DOI: 10.11916/J.ISSN.1005-9113.2015.04.013
Kunpeng Guo, Changdong Zhou, Xiaoyang Zhang, L. Meng
This paper aims at analyzing material-induced lateral pressure of RC cylinder silo in both static and dynamic condition using the finite element method( FEM). In the finite element software ABAQUS,concrete material is modeled by concrete damaged plasticity model,and stored materials in silo is modeled by the hypoplastic theory.In terms of numerical model,shell elements( S4R) and solid elements( C3D8) are applied for model silo wall and stored materials respectively. The interaction between silo wall and stored materials is simulated by Coulomb friction model and penalty contact constrain provided by ABAQUS.The numerical results are verified with the existing experimental data that are designed to ensure the validation of such numerical model using FEM and it obtains good agreements between numerical results and experimental data. Then the material parameters are analyzed in both static and dynamic condition.According to the analysis,it is clear that critical friction angle,initial void ratio and minimum void ratio have an obvious effect on static lateral pressure while all the material parameters affect dynamic lateral pressure at different levels. In addition,differences of silo wall between elastic and plastic state are analyzed in dynamic condition. The numerical results show that it contributes to increasing dynamic pressure when silo wall enters into the plastic state. Finally,this paper discusses the time-history lateral pressure at different heights along silo wall,and analytical results indicate that larger acceleration values play main roles in producing the maximum lateral pressure at higher part of the silo wall.
{"title":"Lateral pressure of RC silos with static and dynamic granular materials","authors":"Kunpeng Guo, Changdong Zhou, Xiaoyang Zhang, L. Meng","doi":"10.11916/J.ISSN.1005-9113.2015.04.013","DOIUrl":"https://doi.org/10.11916/J.ISSN.1005-9113.2015.04.013","url":null,"abstract":"This paper aims at analyzing material-induced lateral pressure of RC cylinder silo in both static and dynamic condition using the finite element method( FEM). In the finite element software ABAQUS,concrete material is modeled by concrete damaged plasticity model,and stored materials in silo is modeled by the hypoplastic theory.In terms of numerical model,shell elements( S4R) and solid elements( C3D8) are applied for model silo wall and stored materials respectively. The interaction between silo wall and stored materials is simulated by Coulomb friction model and penalty contact constrain provided by ABAQUS.The numerical results are verified with the existing experimental data that are designed to ensure the validation of such numerical model using FEM and it obtains good agreements between numerical results and experimental data. Then the material parameters are analyzed in both static and dynamic condition.According to the analysis,it is clear that critical friction angle,initial void ratio and minimum void ratio have an obvious effect on static lateral pressure while all the material parameters affect dynamic lateral pressure at different levels. In addition,differences of silo wall between elastic and plastic state are analyzed in dynamic condition. The numerical results show that it contributes to increasing dynamic pressure when silo wall enters into the plastic state. Finally,this paper discusses the time-history lateral pressure at different heights along silo wall,and analytical results indicate that larger acceleration values play main roles in producing the maximum lateral pressure at higher part of the silo wall.","PeriodicalId":39923,"journal":{"name":"Journal of Harbin Institute of Technology (New Series)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75769928","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 : 2015-01-01DOI: 10.11916/j.issn.1005-9113.2015.06.000]
Ting Lu, Marko Woelki, P. Wagner
In a coordinated road network, the optimal common cycle time is determined by evaluating the performance of the network in the given range of cycles. Normally, this range is determined by users’ experience. And a large range of common cycle times, e.g. [30, 200] is chosen, which requires long computation time. This study considers that the optimal common cycle time ranges between the minimal and maximal value of intersections’ individual optimal cycle time. It is proved mathematically from the convexity condition, that the delay of the network and each individual intersection are convex functions of the cycle time according to Webster delay model. Finally, 2000 random cases for the network composed of two intersections and of eight intersections are created to underline the proposed conclusions. The results of all cases confirm the validity, and show up to 90% improvement in computation time to compare with experience range. The signal optimization tool, Synchro, is also used to validate the conclusion by 50 random cases. The results confirm reliability further.
{"title":"On the Range of the Common Cycle Time in a Road Network","authors":"Ting Lu, Marko Woelki, P. Wagner","doi":"10.11916/j.issn.1005-9113.2015.06.000]","DOIUrl":"https://doi.org/10.11916/j.issn.1005-9113.2015.06.000]","url":null,"abstract":"In a coordinated road network, the optimal common cycle time is determined by evaluating the performance of the network in the given range of cycles. Normally, this range is determined by users’ experience. And a large range of common cycle times, e.g. [30, 200] is chosen, which requires long computation time. This study considers that the optimal common cycle time ranges between the minimal and maximal value of intersections’ individual optimal cycle time. It is proved mathematically from the convexity condition, that the delay of the network and each individual intersection are convex functions of the cycle time according to Webster delay model. Finally, 2000 random cases for the network composed of two intersections and of eight intersections are created to underline the proposed conclusions. The results of all cases confirm the validity, and show up to 90% improvement in computation time to compare with experience range. The signal optimization tool, Synchro, is also used to validate the conclusion by 50 random cases. The results confirm reliability further.","PeriodicalId":39923,"journal":{"name":"Journal of Harbin Institute of Technology (New Series)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80755378","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 : 2015-01-01DOI: 10.17265/2328-2177/2015.05.006
Tian, Xiang, Ma
The destructive cult is an underworld gang organization with the witchcraft and anti- social characteristics,taking the " secular" god,namely the gang master,as the faith. The cause of formation is based on mankind cognitive level and social environment besides artificial factors. So in any time the destructive cult has the possibility and necessity of its existence. In this paper it is emphasized that we should strengthen scientific education,open mind and sublimate oneself at the same time of improving society. Only in this way can we eliminate the influence of the cult and break down the foundations of the cult.
{"title":"The Destructive Cult, the Cause of Formation, Nature and Countermeasures","authors":"Tian, Xiang, Ma","doi":"10.17265/2328-2177/2015.05.006","DOIUrl":"https://doi.org/10.17265/2328-2177/2015.05.006","url":null,"abstract":"The destructive cult is an underworld gang organization with the witchcraft and anti- social characteristics,taking the \" secular\" god,namely the gang master,as the faith. The cause of formation is based on mankind cognitive level and social environment besides artificial factors. So in any time the destructive cult has the possibility and necessity of its existence. In this paper it is emphasized that we should strengthen scientific education,open mind and sublimate oneself at the same time of improving society. Only in this way can we eliminate the influence of the cult and break down the foundations of the cult.","PeriodicalId":39923,"journal":{"name":"Journal of Harbin Institute of Technology (New Series)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82562498","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 : 2015-01-01DOI: 10.11916/J.ISSN.1005-9113.2015.05.002
Xiaoqi Li, Wei Wang, J. Yi
Since the quadruped robot possesses predominant environmental adaptability, it is expected to be employed in nature environments. In some situations, such as ice surface and tight space, the quadruped robot is required to lower the height of center of gravity (COG) to enhance the stability and maneuverability. To properly handle these situations, a quadruped controller based on the central pattern generator (CPG) model, the discrete tracking differentiator (TD) and proportional-derivative (PD) sub-controllers is presented. The CPG is used to generate basic rhythmic motion for the quadruped robot. The discrete TD is not only creatively employed to implement the transition between two different rhythmic medium values of the CPG which results in the adjustment of the height of COG of the quadruped robot, but also modified to control the transition duration which enables the quadruped robot to achieve the stable transition. Additionally, two specific PD sub-controllers are constructed to adjust the oscillation amplitude of the CPG, so as to avoid the severe deviation in the transverse direction during transition locomotion. Finally, the controller is validated on a quadruped model. A tunnel with variable height is built for the quadruped model to travel through. The simulation demonstrates the severe deviation without the PD sub-controllers, and the reduced deviation with the PD sub-controllers.
{"title":"Stable Transition of Quadruped Rhythmic Motion Using the Tracking Differentiator","authors":"Xiaoqi Li, Wei Wang, J. Yi","doi":"10.11916/J.ISSN.1005-9113.2015.05.002","DOIUrl":"https://doi.org/10.11916/J.ISSN.1005-9113.2015.05.002","url":null,"abstract":"Since the quadruped robot possesses predominant environmental adaptability, it is expected to be employed in nature environments. In some situations, such as ice surface and tight space, the quadruped robot is required to lower the height of center of gravity (COG) to enhance the stability and maneuverability. To properly handle these situations, a quadruped controller based on the central pattern generator (CPG) model, the discrete tracking differentiator (TD) and proportional-derivative (PD) sub-controllers is presented. The CPG is used to generate basic rhythmic motion for the quadruped robot. The discrete TD is not only creatively employed to implement the transition between two different rhythmic medium values of the CPG which results in the adjustment of the height of COG of the quadruped robot, but also modified to control the transition duration which enables the quadruped robot to achieve the stable transition. Additionally, two specific PD sub-controllers are constructed to adjust the oscillation amplitude of the CPG, so as to avoid the severe deviation in the transverse direction during transition locomotion. Finally, the controller is validated on a quadruped model. A tunnel with variable height is built for the quadruped model to travel through. The simulation demonstrates the severe deviation without the PD sub-controllers, and the reduced deviation with the PD sub-controllers.","PeriodicalId":39923,"journal":{"name":"Journal of Harbin Institute of Technology (New Series)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88258042","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 : 2010-01-01DOI: 10.1007/978-3-642-04460-1_124
Yun Sun, Y. Xiang, D. Guo, Ting Zhang
{"title":"Analysis of the Deep-Seated Concrete Slab for Settlement Control at Bridge Approach Embankment","authors":"Yun Sun, Y. Xiang, D. Guo, Ting Zhang","doi":"10.1007/978-3-642-04460-1_124","DOIUrl":"https://doi.org/10.1007/978-3-642-04460-1_124","url":null,"abstract":"","PeriodicalId":39923,"journal":{"name":"Journal of Harbin Institute of Technology (New Series)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51069535","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 : 2009-01-01DOI: 10.1007/978-1-4020-9485-9_21
Lie Sun, Baichun Zhang, T. Lin, Zhizhong Zhang
{"title":"An investigation and reconstruction of traditional vertical-Axle-styled 'Chinese great windmill' and its square-pallet chain-pump","authors":"Lie Sun, Baichun Zhang, T. Lin, Zhizhong Zhang","doi":"10.1007/978-1-4020-9485-9_21","DOIUrl":"https://doi.org/10.1007/978-1-4020-9485-9_21","url":null,"abstract":"","PeriodicalId":39923,"journal":{"name":"Journal of Harbin Institute of Technology (New Series)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77909186","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}
August Wilson is acknowledged as the most important American playwright after O'Neill,Williams and Miller.As a cultural nationalist,he insists on blackness of African American theatre and Africanness of the black American identity.Through writing black history in America,he aims at reconnecting contemporary black Americans with Africa and reestablishing their identity.His dramatic vision and writing strategies are so influenced by 4Bs—Romare Bearden,Amiri Baraka,Jorge Lois Borges and Blues that the themes,content,structure,and language of his plays are characterized by the artistic features of painting,story-writing,and music,thus maintaining a distinctive stance in contemporary theatre.
{"title":"Dramatic Vision of August Wilson","authors":"Zhang Jin","doi":"10.5860/choice.33-4983a","DOIUrl":"https://doi.org/10.5860/choice.33-4983a","url":null,"abstract":"August Wilson is acknowledged as the most important American playwright after O'Neill,Williams and Miller.As a cultural nationalist,he insists on blackness of African American theatre and Africanness of the black American identity.Through writing black history in America,he aims at reconnecting contemporary black Americans with Africa and reestablishing their identity.His dramatic vision and writing strategies are so influenced by 4Bs—Romare Bearden,Amiri Baraka,Jorge Lois Borges and Blues that the themes,content,structure,and language of his plays are characterized by the artistic features of painting,story-writing,and music,thus maintaining a distinctive stance in contemporary theatre.","PeriodicalId":39923,"journal":{"name":"Journal of Harbin Institute of Technology (New Series)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77076650","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}
On the basis of the stipulation of 《Constitution Russian Federation》,which went into effect in 12,1993,the names of Russian Federation and of Russian are identical in the sense.Russian Law,besides sentence(case authority),usage,treaties,includes normative acts—orders,resolutions,instructions,corporate acts,and statutes.The form of the state institution and categories of the normative acts in Russia are corresponding.Legislation model of Russian Federation codes becoming effective or invalid embodies brilliant legislation technology,which is very important for China law world to recognize new development of Russian law.
{"title":"On Features of the Russian Law","authors":"W. Xiao","doi":"10.4324/9781315589688-5","DOIUrl":"https://doi.org/10.4324/9781315589688-5","url":null,"abstract":"On the basis of the stipulation of 《Constitution Russian Federation》,which went into effect in 12,1993,the names of Russian Federation and of Russian are identical in the sense.Russian Law,besides sentence(case authority),usage,treaties,includes normative acts—orders,resolutions,instructions,corporate acts,and statutes.The form of the state institution and categories of the normative acts in Russia are corresponding.Legislation model of Russian Federation codes becoming effective or invalid embodies brilliant legislation technology,which is very important for China law world to recognize new development of Russian law.","PeriodicalId":39923,"journal":{"name":"Journal of Harbin Institute of Technology (New Series)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85290230","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 issue of national economic security is becoming more dominant in China after the cold war with the rapid development of a global economy, especially at the time that China has entered WTO. At present, the economic security is the most realistic and important issue for the national security of China. To work out a proper economic security strategy, it is necessary to clarify the conception of "national economic security". In this paper, the author tries to give a definition of the national economic security by analyzing the economic situation of China and that of overseas, borrowing some ideas on national economic security from foreign countries. Then the author analyzes the difference between the national economic security in China and that in some traditional countries, and that in the developed industrial market economy countries. Finally the author points out some questions for further research.
{"title":"On national economic security","authors":"Z. Zhibo","doi":"10.2307/2602467","DOIUrl":"https://doi.org/10.2307/2602467","url":null,"abstract":"The issue of national economic security is becoming more dominant in China after the cold war with the rapid development of a global economy, especially at the time that China has entered WTO. At present, the economic security is the most realistic and important issue for the national security of China. To work out a proper economic security strategy, it is necessary to clarify the conception of \"national economic security\". In this paper, the author tries to give a definition of the national economic security by analyzing the economic situation of China and that of overseas, borrowing some ideas on national economic security from foreign countries. Then the author analyzes the difference between the national economic security in China and that in some traditional countries, and that in the developed industrial market economy countries. Finally the author points out some questions for further research.","PeriodicalId":39923,"journal":{"name":"Journal of Harbin Institute of Technology (New Series)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78204855","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 : 1993-01-01DOI: 10.1007/978-3-7091-7533-0_63
K. Warwick, Y. Kang
{"title":"Genetic Algorithms for On-Line System Identification","authors":"K. Warwick, Y. Kang","doi":"10.1007/978-3-7091-7533-0_63","DOIUrl":"https://doi.org/10.1007/978-3-7091-7533-0_63","url":null,"abstract":"","PeriodicalId":39923,"journal":{"name":"Journal of Harbin Institute of Technology (New Series)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1993-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51404357","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：