Pub Date : 2011-03-26DOI: 10.1109/ICIST.2011.5765113
Yuan Li, B. Li, Xiaofeng Hu, X. Chai
So far there exists no general, common specification for multi-resolution modeling (MRM) to represent models consistent with each other. To address this problem, a new formalism, multi-resolution DEVS (MR-DEVS) is put forward. The definition of multi-resolution entity (MRE), which is the basic object MRM deals with and base for MR-DEVS, is given. Then, MR-DEVS, combining and extending multiple popular existing dynamic structure DEVS formalisms, is elaborated in detail. MR-DEVS is capable of capturing all key characteristics of MRM essentially, including adapting to resolutions changing automatically by reflection, describing consistency mappings and modeling causation by consistency mapping functions and modeling emergence by functions of coupling among sub-entities constituting the same MRE. Any other existing formalism can't do these all.
{"title":"Formalization of multi-resolution modeling based on dynamic structure DEVS","authors":"Yuan Li, B. Li, Xiaofeng Hu, X. Chai","doi":"10.1109/ICIST.2011.5765113","DOIUrl":"https://doi.org/10.1109/ICIST.2011.5765113","url":null,"abstract":"So far there exists no general, common specification for multi-resolution modeling (MRM) to represent models consistent with each other. To address this problem, a new formalism, multi-resolution DEVS (MR-DEVS) is put forward. The definition of multi-resolution entity (MRE), which is the basic object MRM deals with and base for MR-DEVS, is given. Then, MR-DEVS, combining and extending multiple popular existing dynamic structure DEVS formalisms, is elaborated in detail. MR-DEVS is capable of capturing all key characteristics of MRM essentially, including adapting to resolutions changing automatically by reflection, describing consistency mappings and modeling causation by consistency mapping functions and modeling emergence by functions of coupling among sub-entities constituting the same MRE. Any other existing formalism can't do these all.","PeriodicalId":6408,"journal":{"name":"2009 International Conference on Environmental Science and Information Application Technology","volume":"5 1","pages":"855-864"},"PeriodicalIF":0.0,"publicationDate":"2011-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77317267","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 : 2011-03-26DOI: 10.1109/ICIST.2011.5765298
Qingzhou Luo, Peifa Wang, Yong Wang
Object-oriented change detection is more practical than per-pixel change detection when we survey change information of land-use using remote sensing image. A kind of land-use change detection based on patch objects of remote sensing image is studied in this paper. The patch objects of image come from the polygons of historical vector land-use map. The method calculates the weighted correlation coefficient of each patch object in order to identify whether the patch object is changed. Two different time-series SPOT images in a suburb of Shanghai are used to verify the method. The result shows that the method can detect the changes effectively and raises automation level of land-use updating investigation.
{"title":"Study on a kind of land-use change detection based on patch objects of remote sensing image","authors":"Qingzhou Luo, Peifa Wang, Yong Wang","doi":"10.1109/ICIST.2011.5765298","DOIUrl":"https://doi.org/10.1109/ICIST.2011.5765298","url":null,"abstract":"Object-oriented change detection is more practical than per-pixel change detection when we survey change information of land-use using remote sensing image. A kind of land-use change detection based on patch objects of remote sensing image is studied in this paper. The patch objects of image come from the polygons of historical vector land-use map. The method calculates the weighted correlation coefficient of each patch object in order to identify whether the patch object is changed. Two different time-series SPOT images in a suburb of Shanghai are used to verify the method. The result shows that the method can detect the changes effectively and raises automation level of land-use updating investigation.","PeriodicalId":6408,"journal":{"name":"2009 International Conference on Environmental Science and Information Application Technology","volume":"98 1","pages":"493-495"},"PeriodicalIF":0.0,"publicationDate":"2011-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90262973","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 : 2011-03-26DOI: 10.1109/ICIST.2011.5765251
Hengyi Sun, Yangyu Fan, Jing Zhang, Huimin Li, M. Jia
We propose an approach to computing two-dimensional unstable and stable manifolds of three-dimensional vector fields. The main idea is to estimate normal direction on each point around the boundary of current loop of manifold and normalize the normal growth rate during a settled time step to counter the disequilibrium in different directions. In order to enhance the reliability of our approach, linear and nonlinear conditions are considered. It is necessary to state that the time step should be appropriately small to meet the adjacent intervals of points on the boundary of manifold. As example we compute the two-dimensional stable manifold of the origin in Lorenz system. Both successes and shortcomings of our method are presented.
{"title":"A new approach to computing two-dimensional manifolds","authors":"Hengyi Sun, Yangyu Fan, Jing Zhang, Huimin Li, M. Jia","doi":"10.1109/ICIST.2011.5765251","DOIUrl":"https://doi.org/10.1109/ICIST.2011.5765251","url":null,"abstract":"We propose an approach to computing two-dimensional unstable and stable manifolds of three-dimensional vector fields. The main idea is to estimate normal direction on each point around the boundary of current loop of manifold and normalize the normal growth rate during a settled time step to counter the disequilibrium in different directions. In order to enhance the reliability of our approach, linear and nonlinear conditions are considered. It is necessary to state that the time step should be appropriately small to meet the adjacent intervals of points on the boundary of manifold. As example we compute the two-dimensional stable manifold of the origin in Lorenz system. Both successes and shortcomings of our method are presented.","PeriodicalId":6408,"journal":{"name":"2009 International Conference on Environmental Science and Information Application Technology","volume":"25 1","pages":"267-269"},"PeriodicalIF":0.0,"publicationDate":"2011-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91063149","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 : 2011-03-26DOI: 10.1109/ICIST.2011.5765352
Xiangdong Xu, Zhuo Yang, Z. Wang, Chao Chen, Dong Zhou, Yang Yang, Yadong Jiang
Uncooled infrared detectors are applied widely in both civilian and military. Recently, novel microbolometers composing of two planes located at different levels were proposed to improve the performance of the detectors. In this paper, such two-layer microbolometers were simulated by finite element analysis. Results reveal that when SiO2 film is utilized as the isolating and supporting material located at the lower bridge plane, the temperature rise of the pixel reaches 3∼5 times higher than those in the conventional one-layer microbolometers, and the maximum IR absorptance increases for about 40%. Therefore, these two-layer microbolometers are helpful for significantly improving the thermal and optical properties. However, their structural stability turns poor. Consequently, the mechanical properties for such two-layer microbolometers should be enhanced in practical applications.
{"title":"Advanced design of microbolometers for uncooled infrared detectors","authors":"Xiangdong Xu, Zhuo Yang, Z. Wang, Chao Chen, Dong Zhou, Yang Yang, Yadong Jiang","doi":"10.1109/ICIST.2011.5765352","DOIUrl":"https://doi.org/10.1109/ICIST.2011.5765352","url":null,"abstract":"Uncooled infrared detectors are applied widely in both civilian and military. Recently, novel microbolometers composing of two planes located at different levels were proposed to improve the performance of the detectors. In this paper, such two-layer microbolometers were simulated by finite element analysis. Results reveal that when SiO2 film is utilized as the isolating and supporting material located at the lower bridge plane, the temperature rise of the pixel reaches 3∼5 times higher than those in the conventional one-layer microbolometers, and the maximum IR absorptance increases for about 40%. Therefore, these two-layer microbolometers are helpful for significantly improving the thermal and optical properties. However, their structural stability turns poor. Consequently, the mechanical properties for such two-layer microbolometers should be enhanced in practical applications.","PeriodicalId":6408,"journal":{"name":"2009 International Conference on Environmental Science and Information Application Technology","volume":"80 1","pages":"745-747"},"PeriodicalIF":0.0,"publicationDate":"2011-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86237588","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 : 2011-03-26DOI: 10.1109/ICIST.2011.5765259
Chengfa Xu, Yuan Yuan, Junling Wang
System Generator is a system level DSP development tool developed by Xilinx Company, which is based on the graphic modeling technology of Simulink, also is an FPGA-based signal processing modeling and design tool. This paper proposes an FPGA development method based on System Generator. Firstly it analyzes the insufficiency of traditional FPGA design flow, and then studies the advantage in FPGA development based on System Generator. The paper designs a digital beam forming system by means of System Generator. The experimental result indicates that System Generator has an apparent advantage in FPGA design.
System Generator是Xilinx公司开发的基于Simulink图形建模技术的系统级DSP开发工具，也是一种基于fpga的信号处理建模与设计工具。本文提出了一种基于System Generator的FPGA开发方法。首先分析了传统FPGA设计流程的不足，然后研究了基于System Generator的FPGA开发的优势。本文利用系统发生器设计了一个数字波束形成系统。实验结果表明，系统发生器在FPGA设计中具有明显的优势。
{"title":"A new method for FPGA development","authors":"Chengfa Xu, Yuan Yuan, Junling Wang","doi":"10.1109/ICIST.2011.5765259","DOIUrl":"https://doi.org/10.1109/ICIST.2011.5765259","url":null,"abstract":"System Generator is a system level DSP development tool developed by Xilinx Company, which is based on the graphic modeling technology of Simulink, also is an FPGA-based signal processing modeling and design tool. This paper proposes an FPGA development method based on System Generator. Firstly it analyzes the insufficiency of traditional FPGA design flow, and then studies the advantage in FPGA development based on System Generator. The paper designs a digital beam forming system by means of System Generator. The experimental result indicates that System Generator has an apparent advantage in FPGA design.","PeriodicalId":6408,"journal":{"name":"2009 International Conference on Environmental Science and Information Application Technology","volume":"23 1","pages":"314-317"},"PeriodicalIF":0.0,"publicationDate":"2011-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81631414","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 : 2011-03-26DOI: 10.1109/ICIST.2011.5765091
Hao Duan, G. Tan, H. Ren
The performance of ensemble-forecast system on winter 500hPa height field in the Northern Hemispheric Extratropics (NHE) is studied by using the Meteo France model data of DEMETER project, with analysis on performance of the model modes based on empirical orthogonal function (EOF) of observations. Both optimum subset regression (OSR) and analogue method are used to advance the model prediction on ‘bad modes’. Results suggest that the prediction ability of the mode accounting for less variance may be higher than the mode with more variance. The OSR failed, while the analogue method based on OSR shows a possibility of improving the prediction techniques by correcting the bad modes of model. However, since the model has a poor capability in representing the second and third EOF modes of the observation which account for a large percentage of the total variance, the forecast ability can not be improved effectively where the model prediction information is not enough or incorrect. So it is necessary to make a further analysis on the samples of the ‘bad modes’ and the corresponding external forcing which might better realize the correction for such ‘bad modes’.
{"title":"Statistical correction for model prediction on winter circulation in the extra-tropical of Northern Hemisphere","authors":"Hao Duan, G. Tan, H. Ren","doi":"10.1109/ICIST.2011.5765091","DOIUrl":"https://doi.org/10.1109/ICIST.2011.5765091","url":null,"abstract":"The performance of ensemble-forecast system on winter 500hPa height field in the Northern Hemispheric Extratropics (NHE) is studied by using the Meteo France model data of DEMETER project, with analysis on performance of the model modes based on empirical orthogonal function (EOF) of observations. Both optimum subset regression (OSR) and analogue method are used to advance the model prediction on ‘bad modes’. Results suggest that the prediction ability of the mode accounting for less variance may be higher than the mode with more variance. The OSR failed, while the analogue method based on OSR shows a possibility of improving the prediction techniques by correcting the bad modes of model. However, since the model has a poor capability in representing the second and third EOF modes of the observation which account for a large percentage of the total variance, the forecast ability can not be improved effectively where the model prediction information is not enough or incorrect. So it is necessary to make a further analysis on the samples of the ‘bad modes’ and the corresponding external forcing which might better realize the correction for such ‘bad modes’.","PeriodicalId":6408,"journal":{"name":"2009 International Conference on Environmental Science and Information Application Technology","volume":"66 1","pages":"1367-1370"},"PeriodicalIF":0.0,"publicationDate":"2011-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90729798","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 : 2011-03-26DOI: 10.1109/ICIST.2011.5765186
Jubing Zhang, M. Cai, Xiao-peng Li, Zai-gen Mu
In the risk evaluation of a highway tunnel, the recognized risk factors are categorized into two hierarchies. The first hierarchy consists of seven items, which are topography, geology, unfavorable geological condition, special stratigraphy, structural design, tunnel section and depth of embedment, shafts and pilot tunnels. An Analytic Hierarchy Process model is established to prioritize the risk factors in highway tunnels. In the decision making procedure, five experienced experts were organized and surveyed to give their judgments on the importance of different influencing factors to work out the priority. In order to verify the validity of the AHP analysis, two other experts were asked to give their comprehensive evaluation on the same question, results from the two processes are close to each other, this indicates that the AHP method adopted in prioritizing the risk factors of tunnel construction is effective and exercisable, it can be further developed to satisfy the requirements of the risk evaluation process for highway tunnels.
{"title":"Prioritizing highway tunnel risk factors with AHP method","authors":"Jubing Zhang, M. Cai, Xiao-peng Li, Zai-gen Mu","doi":"10.1109/ICIST.2011.5765186","DOIUrl":"https://doi.org/10.1109/ICIST.2011.5765186","url":null,"abstract":"In the risk evaluation of a highway tunnel, the recognized risk factors are categorized into two hierarchies. The first hierarchy consists of seven items, which are topography, geology, unfavorable geological condition, special stratigraphy, structural design, tunnel section and depth of embedment, shafts and pilot tunnels. An Analytic Hierarchy Process model is established to prioritize the risk factors in highway tunnels. In the decision making procedure, five experienced experts were organized and surveyed to give their judgments on the importance of different influencing factors to work out the priority. In order to verify the validity of the AHP analysis, two other experts were asked to give their comprehensive evaluation on the same question, results from the two processes are close to each other, this indicates that the AHP method adopted in prioritizing the risk factors of tunnel construction is effective and exercisable, it can be further developed to satisfy the requirements of the risk evaluation process for highway tunnels.","PeriodicalId":6408,"journal":{"name":"2009 International Conference on Environmental Science and Information Application Technology","volume":"25 1","pages":"1205-1207"},"PeriodicalIF":0.0,"publicationDate":"2011-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90867582","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 : 2011-03-26DOI: 10.1109/ICIST.2011.5765210
Li-Min Zhu, Ji-Nian Bian, Qiang Zhou, Yici Cai
Traditional physical design of FPGAs is usually divided into 2 phases, placement and routing. While it simplifies design modelling and algorithm implementation, some problems such as mismatches between the two will also occur when a valid placed circuit can't be globally routed. The mismatches can significant increase the overall runtime of the physical design. A new placement and global routing integrated algorithm is proposed in order to reduce these mismatches. By immediately applying a global routing feedback to each placement step, the invalid placement step can be found and re-placed. Finally, a valid placed, globally routed circuit is obtained ready for the following detailed routing. This algorithm also takes advantages of the architectural features of the new hierarchical FPGAs and employs clustering at each placement step. As the clustering algorithm is hierarchical in its essence, it is very similar with the FPGA in structure. As a result, the proposed algorithm is very fast in runtime due to all these facts. The experimental results show that a very large circuit can be placed and globally routed very quickly in just a few seconds.
{"title":"A fast placement and global routing integrated algorithm for hierarchical FPGAs","authors":"Li-Min Zhu, Ji-Nian Bian, Qiang Zhou, Yici Cai","doi":"10.1109/ICIST.2011.5765210","DOIUrl":"https://doi.org/10.1109/ICIST.2011.5765210","url":null,"abstract":"Traditional physical design of FPGAs is usually divided into 2 phases, placement and routing. While it simplifies design modelling and algorithm implementation, some problems such as mismatches between the two will also occur when a valid placed circuit can't be globally routed. The mismatches can significant increase the overall runtime of the physical design. A new placement and global routing integrated algorithm is proposed in order to reduce these mismatches. By immediately applying a global routing feedback to each placement step, the invalid placement step can be found and re-placed. Finally, a valid placed, globally routed circuit is obtained ready for the following detailed routing. This algorithm also takes advantages of the architectural features of the new hierarchical FPGAs and employs clustering at each placement step. As the clustering algorithm is hierarchical in its essence, it is very similar with the FPGA in structure. As a result, the proposed algorithm is very fast in runtime due to all these facts. The experimental results show that a very large circuit can be placed and globally routed very quickly in just a few seconds.","PeriodicalId":6408,"journal":{"name":"2009 International Conference on Environmental Science and Information Application Technology","volume":"1 1","pages":"52-57"},"PeriodicalIF":0.0,"publicationDate":"2011-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88465239","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 : 2011-03-26DOI: 10.1109/ICIST.2011.5765161
Hui Cao, Baozhu Jia, Jun-dong Zhang
For middle-speed and four-stroke marine diesel engine, a new engine remote control system based on N Layer distributed processing and dual-redundant CAN network communication technology was presented. It include engine control units, indicating panel unit, engine safety unit, main engine interface, digital governor unit and distributed process module, System data can be exchanged by dual-redundant CAN network. The distributed processing unit is independent in physics completely, so it has less impact on other units when some units have fault. The communication of system units is according to open communication protocol of CAN, with self checking and troubleshooting. It has function of self-insurance when loss power. The mode of system operation is convenient and friendly.
{"title":"Research and application of main engine remote control system with N Layer distributed design","authors":"Hui Cao, Baozhu Jia, Jun-dong Zhang","doi":"10.1109/ICIST.2011.5765161","DOIUrl":"https://doi.org/10.1109/ICIST.2011.5765161","url":null,"abstract":"For middle-speed and four-stroke marine diesel engine, a new engine remote control system based on N Layer distributed processing and dual-redundant CAN network communication technology was presented. It include engine control units, indicating panel unit, engine safety unit, main engine interface, digital governor unit and distributed process module, System data can be exchanged by dual-redundant CAN network. The distributed processing unit is independent in physics completely, so it has less impact on other units when some units have fault. The communication of system units is according to open communication protocol of CAN, with self checking and troubleshooting. It has function of self-insurance when loss power. The mode of system operation is convenient and friendly.","PeriodicalId":6408,"journal":{"name":"2009 International Conference on Environmental Science and Information Application Technology","volume":"1 1","pages":"1094-1097"},"PeriodicalIF":0.0,"publicationDate":"2011-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88135528","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 : 2011-03-26DOI: 10.1109/ICIST.2011.5765163
Qing Li, Wei Yang, Jie Zhou, Junnan Xu
Virtual multi-function display is the simulating realization of multi-function display system. Based on presenting the design principle for virtual multi-function display system, this paper analyzes the important parts—the design and realization technology for three-dimensional modeling and two-dimensional dynamic display controls. And it provides important technical support for the research of the flight simulation training system.
{"title":"Design and realization of virtual multi-function display system","authors":"Qing Li, Wei Yang, Jie Zhou, Junnan Xu","doi":"10.1109/ICIST.2011.5765163","DOIUrl":"https://doi.org/10.1109/ICIST.2011.5765163","url":null,"abstract":"Virtual multi-function display is the simulating realization of multi-function display system. Based on presenting the design principle for virtual multi-function display system, this paper analyzes the important parts—the design and realization technology for three-dimensional modeling and two-dimensional dynamic display controls. And it provides important technical support for the research of the flight simulation training system.","PeriodicalId":6408,"journal":{"name":"2009 International Conference on Environmental Science and Information Application Technology","volume":"93 1","pages":"1103-1106"},"PeriodicalIF":0.0,"publicationDate":"2011-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86742070","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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