The periodical shock oscillations phenomenon induced by transonic shock/turbulence boundary layer interaction is a major cause of transonic buffet. Detached Eddy Simulation (DES) method is applied to study the self-sustained shock oscillations phenomenon of SC (2)-0714 supercritical airfoil in this paper. The periodic shock motion on the upper surface of the airfoil is predicted with the DES method in calculations. The effects of Reynolds number on the shrinkage-reduce frequency of the shock motion, mean shock position and coefficients of fluctuating pressures are also studied in the paper.
{"title":"Application of DES Method to the Numerical Study of Shock Oscillations on a Supercritical Airfoil","authors":"Tao Yang, H. Yong, Wei Zhi, L. Guangyuan","doi":"10.1109/ISDEA.2012.625","DOIUrl":"https://doi.org/10.1109/ISDEA.2012.625","url":null,"abstract":"The periodical shock oscillations phenomenon induced by transonic shock/turbulence boundary layer interaction is a major cause of transonic buffet. Detached Eddy Simulation (DES) method is applied to study the self-sustained shock oscillations phenomenon of SC (2)-0714 supercritical airfoil in this paper. The periodic shock motion on the upper surface of the airfoil is predicted with the DES method in calculations. The effects of Reynolds number on the shrinkage-reduce frequency of the shock motion, mean shock position and coefficients of fluctuating pressures are also studied in the paper.","PeriodicalId":267532,"journal":{"name":"2012 Second International Conference on Intelligent System Design and Engineering Application","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122473539","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}
Most computer vision methods deal with the single object recognition problem. If an object is so small that little features can be used to support recognition procedure, the relationship between multi-objects could be helpful. In many cases, small objects are likely to be arranged by some regular shapes. To recognize these arrays, the paper presents a spatial topology detection algorithm. We call it as S-Prim (Spatial Prim) algorithm which is based on classic Prim algorithm, and integrates the fuzzy spatial information. The algorithm evaluates the spatial distribution regularity among neighboring nodes by back searching the path in the found tree when it is growing, and controls its growing direction according to some fuzzy rules to find out the most likely regular spatial topology. The detected tree can be considered as a spanning tree constrained by topological structures.
{"title":"The Topological Detection Algorithm of Object Arrays in Noisy Context Based on Fuzzy Spatial Information Fusion and Prim Algorithm","authors":"Tao Wusha","doi":"10.1109/ISDEA.2012.477","DOIUrl":"https://doi.org/10.1109/ISDEA.2012.477","url":null,"abstract":"Most computer vision methods deal with the single object recognition problem. If an object is so small that little features can be used to support recognition procedure, the relationship between multi-objects could be helpful. In many cases, small objects are likely to be arranged by some regular shapes. To recognize these arrays, the paper presents a spatial topology detection algorithm. We call it as S-Prim (Spatial Prim) algorithm which is based on classic Prim algorithm, and integrates the fuzzy spatial information. The algorithm evaluates the spatial distribution regularity among neighboring nodes by back searching the path in the found tree when it is growing, and controls its growing direction according to some fuzzy rules to find out the most likely regular spatial topology. The detected tree can be considered as a spanning tree constrained by topological structures.","PeriodicalId":267532,"journal":{"name":"2012 Second International Conference on Intelligent System Design and Engineering Application","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132672749","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}
In this paper, a rough set (RS) and neural network (NN) integrated algorithm based fault a gnosis for power transformers, using dissolved gas analysis (DGA) is proposed. This approach takes advantage of the knowledge reduction ability of rough set and good classified diagnosis ability of NN. Power transformer fault parameters are reduced by rough sets, then work as BP neural network's input vector. Neural network initial weights are set according to the confidence of reduction parameters. Simulation results show that the combination of rough sets with neural network has good diagnostic ability.
{"title":"Power Transformer Fault Diagnosis Based on Integrated of Rough Set Theory and Neural Network","authors":"A. Zhou, Song Hong, Xiao Hui, Zeng Xiao-hui","doi":"10.1109/ISDEA.2012.530","DOIUrl":"https://doi.org/10.1109/ISDEA.2012.530","url":null,"abstract":"In this paper, a rough set (RS) and neural network (NN) integrated algorithm based fault a gnosis for power transformers, using dissolved gas analysis (DGA) is proposed. This approach takes advantage of the knowledge reduction ability of rough set and good classified diagnosis ability of NN. Power transformer fault parameters are reduced by rough sets, then work as BP neural network's input vector. Neural network initial weights are set according to the confidence of reduction parameters. Simulation results show that the combination of rough sets with neural network has good diagnostic ability.","PeriodicalId":267532,"journal":{"name":"2012 Second International Conference on Intelligent System Design and Engineering Application","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115388599","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}
It is common to apply turbocharger technology on marine diesel engine, and the turbocharged strength is being improved. However, over 90% of schedule, the diesel engine runs at low load, bringing about problems such as inadequate torque, high fuel consumption, high heat load and etc. And directly impact operation of power and economy. The key point to improve low-load performance of marine turbocharged diesel engine is that the turbocharger can fully use exhaust energy. In this paper, variable volume exhaust pipe technology is applied as pulse turbo charging system to enhance waste gas utilization, and hence guarantee sufficient energy for turbocharger, improve low-load performance and reduce ship operating cost.
{"title":"Study on Energy Technology of Marine Turbocharged Diesel Engine under Low-Load Conditions","authors":"Zhang Li, Min Li","doi":"10.1109/ISDEA.2012.667","DOIUrl":"https://doi.org/10.1109/ISDEA.2012.667","url":null,"abstract":"It is common to apply turbocharger technology on marine diesel engine, and the turbocharged strength is being improved. However, over 90% of schedule, the diesel engine runs at low load, bringing about problems such as inadequate torque, high fuel consumption, high heat load and etc. And directly impact operation of power and economy. The key point to improve low-load performance of marine turbocharged diesel engine is that the turbocharger can fully use exhaust energy. In this paper, variable volume exhaust pipe technology is applied as pulse turbo charging system to enhance waste gas utilization, and hence guarantee sufficient energy for turbocharger, improve low-load performance and reduce ship operating cost.","PeriodicalId":267532,"journal":{"name":"2012 Second International Conference on Intelligent System Design and Engineering Application","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114662973","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}
Combination-boom is a kind of large scale boom with non-uniform sections, which will generate large deflection in the loading cases. As for that, auxiliary bracing is necessary. Using FEM software, an optimization strategy has been proposed. Firstly, based on equivalent inertia moment method, the boom system can be simplified, after that a model of boom system would be set up. Secondly, with different optimization methods, the length of bracing and the position where it is pining with boom are optimized. The results derived from different methods would be compared to infer which one would be more available. This strategy will be benefit to design auxiliary bracing system.
{"title":"Optimization for Auxiliary Bracing of Non-uniform Section Boom","authors":"Xin Wang, Yang Zhou, S. Gao","doi":"10.1109/ISDEA.2012.574","DOIUrl":"https://doi.org/10.1109/ISDEA.2012.574","url":null,"abstract":"Combination-boom is a kind of large scale boom with non-uniform sections, which will generate large deflection in the loading cases. As for that, auxiliary bracing is necessary. Using FEM software, an optimization strategy has been proposed. Firstly, based on equivalent inertia moment method, the boom system can be simplified, after that a model of boom system would be set up. Secondly, with different optimization methods, the length of bracing and the position where it is pining with boom are optimized. The results derived from different methods would be compared to infer which one would be more available. This strategy will be benefit to design auxiliary bracing system.","PeriodicalId":267532,"journal":{"name":"2012 Second International Conference on Intelligent System Design and Engineering Application","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127273355","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}
Current hardware implementations of TLS (thread-level speculation) in both Hydra and Renau's SESC simulator use a global component to check data dependence violations, e.g. L2 Cache or hardware list. Frequent memory accesses cause global component bottlenecks. Implementation and verification of the global component dramatically slows the processor's frequency. In this paper, we propose a cache coherence protocol using a distributed data dependence violation checking mechanism for TLS. The proposed protocol extends the current MESI cache coherence protocol by including several methods to exceed the present limits of centralized violation checking methods. In order not to broadcast every exposed write to the snooping bus, the protocol adds an invalidation vector to each private L1 cache to record threads that violate RAW data dependence. It also adds a versioning priority register that compares data versions. Added to each private L1 cache block is a snooping bit which indicates whether the thread possesses a bus snooping right for the block. The L1 Cache gets a bus snooping right when setting snooping bit. The L1 Cache catches exposed read miss whose address matching cache block address field. If a read miss from a remote core with a lower versioning priority, the L1 Cache updates the invalidation vector according to the core ID on the bus. If TLS runtime is going to commit or invalidate a thread, then L1 Cache invalidates threads whose bits have been set in the invalidation vector and changes any cache blocks to a corresponding non-speculative state. In order to implement the proposed protocol, we modified the SESC simulator, which is an open-source cycle-accurate simulator, to confirm its correctness and analyze its performance.
{"title":"A Cache Coherence Protocol Using Distributed Data Dependence Violation Checking in TLS","authors":"X. Lai, Cong Liu, Zhiying Wang, Quanyou Feng","doi":"10.1109/ISDEA.2012.386","DOIUrl":"https://doi.org/10.1109/ISDEA.2012.386","url":null,"abstract":"Current hardware implementations of TLS (thread-level speculation) in both Hydra and Renau's SESC simulator use a global component to check data dependence violations, e.g. L2 Cache or hardware list. Frequent memory accesses cause global component bottlenecks. Implementation and verification of the global component dramatically slows the processor's frequency. In this paper, we propose a cache coherence protocol using a distributed data dependence violation checking mechanism for TLS. The proposed protocol extends the current MESI cache coherence protocol by including several methods to exceed the present limits of centralized violation checking methods. In order not to broadcast every exposed write to the snooping bus, the protocol adds an invalidation vector to each private L1 cache to record threads that violate RAW data dependence. It also adds a versioning priority register that compares data versions. Added to each private L1 cache block is a snooping bit which indicates whether the thread possesses a bus snooping right for the block. The L1 Cache gets a bus snooping right when setting snooping bit. The L1 Cache catches exposed read miss whose address matching cache block address field. If a read miss from a remote core with a lower versioning priority, the L1 Cache updates the invalidation vector according to the core ID on the bus. If TLS runtime is going to commit or invalidate a thread, then L1 Cache invalidates threads whose bits have been set in the invalidation vector and changes any cache blocks to a corresponding non-speculative state. In order to implement the proposed protocol, we modified the SESC simulator, which is an open-source cycle-accurate simulator, to confirm its correctness and analyze its performance.","PeriodicalId":267532,"journal":{"name":"2012 Second International Conference on Intelligent System Design and Engineering Application","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124947330","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}
Space objects surveillance for collision warning is a constraint satisfaction scheduling problem of multiple targets measurement. This paper summarizes the various factors in the scheduling process and proposes the mathematical model of non-cooperative measurement resource scheduling system. The heuristic scheduling algorithms and fuzzy evaluation method is applied to non-cooperative resource scheduling and achieve effective scheduling result.
{"title":"Resource Scheduling Algorithm of Space Objects Surveillance for Collision Warning","authors":"Li Bo, Li Daqi","doi":"10.1109/ISDEA.2012.474","DOIUrl":"https://doi.org/10.1109/ISDEA.2012.474","url":null,"abstract":"Space objects surveillance for collision warning is a constraint satisfaction scheduling problem of multiple targets measurement. This paper summarizes the various factors in the scheduling process and proposes the mathematical model of non-cooperative measurement resource scheduling system. The heuristic scheduling algorithms and fuzzy evaluation method is applied to non-cooperative resource scheduling and achieve effective scheduling result.","PeriodicalId":267532,"journal":{"name":"2012 Second International Conference on Intelligent System Design and Engineering Application","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125030020","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}
Dai Sihui, Xiong Xing-yao, Sun Xiaowu, Yao Jun, Deng Ping, L. Ming
In order to improve the germination via physical method, the physical properties of triploid watermelon seed were measured. Watermelon seeds of three varieties, Heiniu, Mihong and Huapi, at the moisture content of 7.02, 6.55 & 6.75 % (w.b.), were selected to study the physical properties using standard methods, respectively. Experimental results obtained the physical properties' parameters, length, width, thickness, arithmetic mean diameter, geometric mean diameter, sphericity, surface area, volume, true and bulk densities, porosity, repose angles and static coefficient of friction of the three varieties' seeds. It is concluded that this study results supply a gap of the physical properties of triploid watermelon seeds in the world and provides with useful data to design processing machine for triploid watermelon seeds germination and seeding.
{"title":"Some Physical Properties of Triploid Watermelon Seed","authors":"Dai Sihui, Xiong Xing-yao, Sun Xiaowu, Yao Jun, Deng Ping, L. Ming","doi":"10.1109/ISDEA.2012.697","DOIUrl":"https://doi.org/10.1109/ISDEA.2012.697","url":null,"abstract":"In order to improve the germination via physical method, the physical properties of triploid watermelon seed were measured. Watermelon seeds of three varieties, Heiniu, Mihong and Huapi, at the moisture content of 7.02, 6.55 & 6.75 % (w.b.), were selected to study the physical properties using standard methods, respectively. Experimental results obtained the physical properties' parameters, length, width, thickness, arithmetic mean diameter, geometric mean diameter, sphericity, surface area, volume, true and bulk densities, porosity, repose angles and static coefficient of friction of the three varieties' seeds. It is concluded that this study results supply a gap of the physical properties of triploid watermelon seeds in the world and provides with useful data to design processing machine for triploid watermelon seeds germination and seeding.","PeriodicalId":267532,"journal":{"name":"2012 Second International Conference on Intelligent System Design and Engineering Application","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114898396","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}
Zhang Xing, H. Mukai, L. Fang, Yuan Changzhou, Zhao Wei
In micro grid, the voltage and frequency will fluctuate with the switching of large-power electric load. With inverter control of energy storage systems,both active and reactive power pumped into the utility grid can be controlled which could achieve the stabilizing effect of voltage and frequency. This paper addresses active and reactive power control strategies used in energy storage system to eliminate the fluctuation. The active power is controlled based on a frequency-droop characteristic and a complimentary frequency restoration strategy. The reactive power is controlled based on a voltage-droop characteristic and a load reactive power compensation strategy. The experimental results demonstrate the effectiveness of the proposed control strategy under various micro grid operating conditions.
{"title":"Analysis and Control of Energy Storage Systems in Microgrid","authors":"Zhang Xing, H. Mukai, L. Fang, Yuan Changzhou, Zhao Wei","doi":"10.1109/ISDEA.2012.529","DOIUrl":"https://doi.org/10.1109/ISDEA.2012.529","url":null,"abstract":"In micro grid, the voltage and frequency will fluctuate with the switching of large-power electric load. With inverter control of energy storage systems,both active and reactive power pumped into the utility grid can be controlled which could achieve the stabilizing effect of voltage and frequency. This paper addresses active and reactive power control strategies used in energy storage system to eliminate the fluctuation. The active power is controlled based on a frequency-droop characteristic and a complimentary frequency restoration strategy. The reactive power is controlled based on a voltage-droop characteristic and a load reactive power compensation strategy. The experimental results demonstrate the effectiveness of the proposed control strategy under various micro grid operating conditions.","PeriodicalId":267532,"journal":{"name":"2012 Second International Conference on Intelligent System Design and Engineering Application","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122778874","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 study adopts the general regression neural network (GRNN) to predict wind speeds. The training data sets are the real wind speeds obtained from CKS International Airport. The 5 days (120 hours) of the three year from 2006 to 2008 is selected as an example to appraise the prediction performance by using GRNN. Comparing to the traditional linear time-series-based model, the superiority of GRNN method to wind prediction can be valid.
{"title":"Wind Prediction Based on General Regression Neural Network","authors":"Chun-Yao Lee, Yan-Lou He","doi":"10.1109/ISDEA.2012.520","DOIUrl":"https://doi.org/10.1109/ISDEA.2012.520","url":null,"abstract":"This study adopts the general regression neural network (GRNN) to predict wind speeds. The training data sets are the real wind speeds obtained from CKS International Airport. The 5 days (120 hours) of the three year from 2006 to 2008 is selected as an example to appraise the prediction performance by using GRNN. Comparing to the traditional linear time-series-based model, the superiority of GRNN method to wind prediction can be valid.","PeriodicalId":267532,"journal":{"name":"2012 Second International Conference on Intelligent System Design and Engineering Application","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122488424","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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