Based on the theory of AC motor vector control, designed the electric vehicle control system. Through a reasonable design on the hardware and software, the selection of DSP chip TM320LF2407A as the core, and the repeated experiments and simulation of the system, proved the feasibility of the system in speeding control.
{"title":"Vector Control Speed of EV AC Motor Based on TM320LF2407A","authors":"Wang Xiao-feng, Xiao Jing, Huo Hai-lin","doi":"10.1109/CESCE.2010.197","DOIUrl":"https://doi.org/10.1109/CESCE.2010.197","url":null,"abstract":"Based on the theory of AC motor vector control, designed the electric vehicle control system. Through a reasonable design on the hardware and software, the selection of DSP chip TM320LF2407A as the core, and the repeated experiments and simulation of the system, proved the feasibility of the system in speeding control.","PeriodicalId":6371,"journal":{"name":"2010 International Conference on Challenges in Environmental Science and Computer Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85232453","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 most superior production conditions that meet the targets’ needs can be selected after the visual and variance analysis of orthogonal design effects. But before the verification test, the optimal production conditions selected, the possible target’s value and the range of the targets haven’t been got. Based on the data structure of upright design experiment, the mathematical model of orthogonal table head design can be set up under some experimental conditions, and the effect value estimation of every parameter can be got according to the method of evaluation in differential. The theoretical estimation and interval estimation can be carried out in advance through the introduction of the process of effect calculation and the theoretical analysis of target’s value with the optimal plan in upright design test.
{"title":"The Calculation of Effect and the Anticipant Estimation of Index's Value in Orthogonal Design","authors":"Wei Xiaoling, Zhao Qiang, L. Zhimin","doi":"10.1109/CESCE.2010.99","DOIUrl":"https://doi.org/10.1109/CESCE.2010.99","url":null,"abstract":"The most superior production conditions that meet the targets’ needs can be selected after the visual and variance analysis of orthogonal design effects. But before the verification test, the optimal production conditions selected, the possible target’s value and the range of the targets haven’t been got. Based on the data structure of upright design experiment, the mathematical model of orthogonal table head design can be set up under some experimental conditions, and the effect value estimation of every parameter can be got according to the method of evaluation in differential. The theoretical estimation and interval estimation can be carried out in advance through the introduction of the process of effect calculation and the theoretical analysis of target’s value with the optimal plan in upright design test.","PeriodicalId":6371,"journal":{"name":"2010 International Conference on Challenges in Environmental Science and Computer Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82061644","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 concept of sustainable development, despite theoretically faultless, is less practicable due to its abstract quality. This paper cites a degraded small drainage area to analyze how the ecosystem, through controlling, has evolved from a seriously degraded baseline to a weak, and further a strongly sustainable status, by observing the change of I/O relationship. Accordingly, this paper proposes a conceptual model of ecosystem degradation and the sustainability, and divides 5 types of system states and finally, explores the sustainable restoration model of the sample.
{"title":"Restoration of Degraded Ecosystem: A Pathway to Sustainability","authors":"Bin Zhang","doi":"10.1109/CESCE.2010.8","DOIUrl":"https://doi.org/10.1109/CESCE.2010.8","url":null,"abstract":"The concept of sustainable development, despite theoretically faultless, is less practicable due to its abstract quality. This paper cites a degraded small drainage area to analyze how the ecosystem, through controlling, has evolved from a seriously degraded baseline to a weak, and further a strongly sustainable status, by observing the change of I/O relationship. Accordingly, this paper proposes a conceptual model of ecosystem degradation and the sustainability, and divides 5 types of system states and finally, explores the sustainable restoration model of the sample.","PeriodicalId":6371,"journal":{"name":"2010 International Conference on Challenges in Environmental Science and Computer Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79696917","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}
Filtration combustion in porous media offers good advantages such as super-adiabatic combustion temperature in making hydrogen from hydrogen sulfur which is extremely toxic and is vastly produced in industry. In order to study the mechanism of making hydrogen from rich filtration combustion of hydrogen sulfur, computational fluid dynamics (CFD) were employed combining with a detail H2S oxidation mechanism to model the filtration combustion of hydrogen sulfide in a packed bed of uniform 3 mm diameter alumina spherical particles. The standard k-e turbulence model and a detail H2S oxidation mechanism with 17 species and 57 elemental reactions were adopted, and several equivalence ratios phi (1.0-4.0) were investigated. The numerical results agreed well with the experimental data, indicating that the combination of CFD with detail chemical kinetics gives good performance in modeling the anisotropic filtration flames. The combustion temperature exceeds the theoretical adiabatic combustion temperature by over 300 K, offering high temperature to decompose the hydrogen sulfide to hydrogen up to a conversion rate of 20%. On the other hand, the simulated combustion temperatures were relatively lower than the experimental data, resulting that much more un-burnt H2S (3.6% in simulation and 2.2% in experiment when phi=2.0) existed at the outlet. However, the predicted hydrogen concentrations were larger (3.3% in simulation and 2.0% in experimental when phi=2.0) than those measured in experiment.
{"title":"Numerical Simulation of Making Hydrogen from Rich Filtration Combustion of Hydrogen Sulfide","authors":"Li Guoneng","doi":"10.1109/CESCE.2010.52","DOIUrl":"https://doi.org/10.1109/CESCE.2010.52","url":null,"abstract":"Filtration combustion in porous media offers good advantages such as super-adiabatic combustion temperature in making hydrogen from hydrogen sulfur which is extremely toxic and is vastly produced in industry. In order to study the mechanism of making hydrogen from rich filtration combustion of hydrogen sulfur, computational fluid dynamics (CFD) were employed combining with a detail H2S oxidation mechanism to model the filtration combustion of hydrogen sulfide in a packed bed of uniform 3 mm diameter alumina spherical particles. The standard k-e turbulence model and a detail H2S oxidation mechanism with 17 species and 57 elemental reactions were adopted, and several equivalence ratios phi (1.0-4.0) were investigated. The numerical results agreed well with the experimental data, indicating that the combination of CFD with detail chemical kinetics gives good performance in modeling the anisotropic filtration flames. The combustion temperature exceeds the theoretical adiabatic combustion temperature by over 300 K, offering high temperature to decompose the hydrogen sulfide to hydrogen up to a conversion rate of 20%. On the other hand, the simulated combustion temperatures were relatively lower than the experimental data, resulting that much more un-burnt H2S (3.6% in simulation and 2.2% in experiment when phi=2.0) existed at the outlet. However, the predicted hydrogen concentrations were larger (3.3% in simulation and 2.0% in experimental when phi=2.0) than those measured in experiment.","PeriodicalId":6371,"journal":{"name":"2010 International Conference on Challenges in Environmental Science and Computer Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84671346","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}
J. A. Kumar, He Junguo, Li Jianzheng, Zheng Guocheng
Methane fermentation of cattle manure (CM) with different total solid contents were conducted in the laboratory-scale batch reactors (2.5 L volume) in order to determine the substrate concentration performance and potential energy recovery at the optimal mesophilic (35 oC) and thermophilic (55 oC) temperatures. The three reactors containing CM and water in the ratios (w/w) of 1:1 (wet fermentation), 2:1 and 1:0 (undiluted manure, dry fermentation) were utilized for the both conditions. The work was performed for a period of 63 days to compare the volatile solids and dissolved organic carbon degradation, COD removal, and VFAs. The results showed that the specific biogas yields, in terms of per kilogram of CM, were 41.68, 43.72 and 44.98 L/kg with 22.61, 23.69 and 24.96 L/kg methane contents respectively for the ratios of 1:1, 2:1 and 1:0 at 35 oC, while 43.03, 44.89 and 45.71 L/kg biogas with 23.45, 24.15 and 25.57 L/kg methane contents respectively for the ratios 1:1, 2:1 and 1:0 at 55 oC. The volume of the digester was increased in the wet fermentation for the same loading rate. Though water and thermophilic condition could promote the startup process and the biodegradability of the substrate, the total biogas and methane yields in the dry fermentation were found comparable to the conventional process (wet fermentation).
{"title":"Effect of Substrate Concentration on Methane Fermentation of Cattle Dung","authors":"J. A. Kumar, He Junguo, Li Jianzheng, Zheng Guocheng","doi":"10.1109/CESCE.2010.245","DOIUrl":"https://doi.org/10.1109/CESCE.2010.245","url":null,"abstract":"Methane fermentation of cattle manure (CM) with different total solid contents were conducted in the laboratory-scale batch reactors (2.5 L volume) in order to determine the substrate concentration performance and potential energy recovery at the optimal mesophilic (35 oC) and thermophilic (55 oC) temperatures. The three reactors containing CM and water in the ratios (w/w) of 1:1 (wet fermentation), 2:1 and 1:0 (undiluted manure, dry fermentation) were utilized for the both conditions. The work was performed for a period of 63 days to compare the volatile solids and dissolved organic carbon degradation, COD removal, and VFAs. The results showed that the specific biogas yields, in terms of per kilogram of CM, were 41.68, 43.72 and 44.98 L/kg with 22.61, 23.69 and 24.96 L/kg methane contents respectively for the ratios of 1:1, 2:1 and 1:0 at 35 oC, while 43.03, 44.89 and 45.71 L/kg biogas with 23.45, 24.15 and 25.57 L/kg methane contents respectively for the ratios 1:1, 2:1 and 1:0 at 55 oC. The volume of the digester was increased in the wet fermentation for the same loading rate. Though water and thermophilic condition could promote the startup process and the biodegradability of the substrate, the total biogas and methane yields in the dry fermentation were found comparable to the conventional process (wet fermentation).","PeriodicalId":6371,"journal":{"name":"2010 International Conference on Challenges in Environmental Science and Computer Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85248594","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}
We present a practical and efficient stereo matching approach which produces a dense disparity map with the pair-wise sequence alignment algorithm based on dynamic programming in this paper. Firstly, pair-wise sequence alignment algorithm based on the dynamic programming is introduced where the optimal alignment of two sequences could be acquired by tracing back the similarity matrix which is constructed according to characters in two sequences using dynamic programming algorithm. Second, we think of pixel gray value of all homonymy epipolar lines in two images in turn as two string sequences, and then disparity of corresponding point in two images is calculated by the number of gaps inserted the optimal alignment in every two string sequences. Additionally, according to epipolar constraint we can know that homonymy epipolar lines in two images parallel to the scan-lines, so the 2D matching of images is simplified to that of 1D. The experiment result shows that the proposed approach is stable and efficient, and it has a high matching accuracy and low computational complexity.
{"title":"An Approach for Stereo Matching Using Pair-wise Sequence Alignment Algorithm Based on Dynamic Programming","authors":"Shi Wanli, Wang Hongyong","doi":"10.1109/CESCE.2010.207","DOIUrl":"https://doi.org/10.1109/CESCE.2010.207","url":null,"abstract":"We present a practical and efficient stereo matching approach which produces a dense disparity map with the pair-wise sequence alignment algorithm based on dynamic programming in this paper. Firstly, pair-wise sequence alignment algorithm based on the dynamic programming is introduced where the optimal alignment of two sequences could be acquired by tracing back the similarity matrix which is constructed according to characters in two sequences using dynamic programming algorithm. Second, we think of pixel gray value of all homonymy epipolar lines in two images in turn as two string sequences, and then disparity of corresponding point in two images is calculated by the number of gaps inserted the optimal alignment in every two string sequences. Additionally, according to epipolar constraint we can know that homonymy epipolar lines in two images parallel to the scan-lines, so the 2D matching of images is simplified to that of 1D. The experiment result shows that the proposed approach is stable and efficient, and it has a high matching accuracy and low computational complexity.","PeriodicalId":6371,"journal":{"name":"2010 International Conference on Challenges in Environmental Science and Computer Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83713581","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}
An anaerobic moving bed biofilm reactor filled with small and low density polyethylene support as biofilm carrier was operated to treat wine distillery wastewater for nearly 8 months. The support packed in the reactor is Bioflow 30 with density 0.92g/cm3 and specific surface area of 320m2/m3. The reactor achieved soluble COD removal efficiency of 86.1% at organic loading rate(OLR) between 16.88 and 18.43g COD/l/ d and an hydraulic retention time(HRT) of 2.49days. The experimental results show that the reactor is an interesting choice for anaerobic digestion of wine distillery wastewater. The experiment provides a good base for choosing packing in implementation of the reactor.
{"title":"Treatment of Wine Distillery Wastewater Using an Anaerobic Moving Bed Biofilm Reactor with Low Density of Polyethylene Support","authors":"C. Sheli, R. Moletta","doi":"10.1109/CESCE.2010.229","DOIUrl":"https://doi.org/10.1109/CESCE.2010.229","url":null,"abstract":"An anaerobic moving bed biofilm reactor filled with small and low density polyethylene support as biofilm carrier was operated to treat wine distillery wastewater for nearly 8 months. The support packed in the reactor is Bioflow 30 with density 0.92g/cm3 and specific surface area of 320m2/m3. The reactor achieved soluble COD removal efficiency of 86.1% at organic loading rate(OLR) between 16.88 and 18.43g COD/l/ d and an hydraulic retention time(HRT) of 2.49days. The experimental results show that the reactor is an interesting choice for anaerobic digestion of wine distillery wastewater. The experiment provides a good base for choosing packing in implementation of the reactor.","PeriodicalId":6371,"journal":{"name":"2010 International Conference on Challenges in Environmental Science and Computer Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82515694","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 water resource in Jiangxi Province is very crucial to ecological security of China. According to the data of recent years, this paper analysize the current status of water resources. It points out that Jiangxi is scarce of water seasonally. With respect to the problem, several counter-measurements including spatial information techniques are put forward, which can effectively solve these problems. However, to fulfill this task need more efforts.
{"title":"Research on Protection of Water Resource in Jiangxi Province","authors":"J. Gong, Dunyin Wu, Zhongwen Yu","doi":"10.1109/CESCE.2010.32","DOIUrl":"https://doi.org/10.1109/CESCE.2010.32","url":null,"abstract":"The water resource in Jiangxi Province is very crucial to ecological security of China. According to the data of recent years, this paper analysize the current status of water resources. It points out that Jiangxi is scarce of water seasonally. With respect to the problem, several counter-measurements including spatial information techniques are put forward, which can effectively solve these problems. However, to fulfill this task need more efforts.","PeriodicalId":6371,"journal":{"name":"2010 International Conference on Challenges in Environmental Science and Computer Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82656872","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}
Shi Yong-qiang, Hu Wei-hua, Xu Ming, Wu Peng, Zhou Qi-li
Modeling is mathematical representation of a process, device, or concept by means of a number of variables that are defined to represent the inputs, outputs, and internal states of the device or process, and a set of equations and inequalities describing the interaction of these variables. It is a way to visualize a physical phenomenon using mathematical equations to describe its behavior during a certain period of time. So a model is basically an equation The model consists of simple polynomial equations but most of the real-world model consist of something called differential equations, which describe the "rate" of change of a certain quantity in the model. A practical "learn by doing" approach fosters the development of the skills beyond pure mathematics needed to set up and manipulate mathematical models.
{"title":"Principles and Practice of Computer-Assisted Draft Object Modelling","authors":"Shi Yong-qiang, Hu Wei-hua, Xu Ming, Wu Peng, Zhou Qi-li","doi":"10.1109/CESCE.2010.243","DOIUrl":"https://doi.org/10.1109/CESCE.2010.243","url":null,"abstract":"Modeling is mathematical representation of a process, device, or concept by means of a number of variables that are defined to represent the inputs, outputs, and internal states of the device or process, and a set of equations and inequalities describing the interaction of these variables. It is a way to visualize a physical phenomenon using mathematical equations to describe its behavior during a certain period of time. So a model is basically an equation The model consists of simple polynomial equations but most of the real-world model consist of something called differential equations, which describe the \"rate\" of change of a certain quantity in the model. A practical \"learn by doing\" approach fosters the development of the skills beyond pure mathematics needed to set up and manipulate mathematical models.","PeriodicalId":6371,"journal":{"name":"2010 International Conference on Challenges in Environmental Science and Computer Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80762383","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}
Network security situation evaluation and prediction is a new technology to monitor network security, and it is one of hot research domains in information security. The research situation of network security situation evaluation and prediction all over the world is analyzed. A network security situation evaluation and prediction model based on grey theory is presented. The model is divided into two stages: current network security situation evaluation modeling and future network security situation prediction modeling. The model of current network security situation evaluation using simple additive weight method is established by the threat of various services attacked. The model of future network security situation prediction adopting grey theory is built by past and current network security situation.
{"title":"The Building of Network Security Situation Evaluation and Prediction Model Based on Grey Theory","authors":"Jianfeng Dong","doi":"10.1109/CESCE.2010.271","DOIUrl":"https://doi.org/10.1109/CESCE.2010.271","url":null,"abstract":"Network security situation evaluation and prediction is a new technology to monitor network security, and it is one of hot research domains in information security. The research situation of network security situation evaluation and prediction all over the world is analyzed. A network security situation evaluation and prediction model based on grey theory is presented. The model is divided into two stages: current network security situation evaluation modeling and future network security situation prediction modeling. The model of current network security situation evaluation using simple additive weight method is established by the threat of various services attacked. The model of future network security situation prediction adopting grey theory is built by past and current network security situation.","PeriodicalId":6371,"journal":{"name":"2010 International Conference on Challenges in Environmental Science and Computer Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83386536","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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