The reasonable establishment of rotor dynamics model is very important in the study. This paper establishes a dynamic model of the rotor, and gets the numerical calculation of the frequencies and mode shapes of the rotor under the free condition. The modal of the rotor bearing system is analyzed by using software. Compared to the above two kinds of results, the test of turbocharger rotor mechanics correctly modeled is to prove that this method has practical significance.
{"title":"Research on the Verification Method of the Rotor Dynamics Model of the Locomotive Turbocharger","authors":"Aiping Zhang, Chengbin Zhao","doi":"10.1109/CSMA.2015.70","DOIUrl":"https://doi.org/10.1109/CSMA.2015.70","url":null,"abstract":"The reasonable establishment of rotor dynamics model is very important in the study. This paper establishes a dynamic model of the rotor, and gets the numerical calculation of the frequencies and mode shapes of the rotor under the free condition. The modal of the rotor bearing system is analyzed by using software. Compared to the above two kinds of results, the test of turbocharger rotor mechanics correctly modeled is to prove that this method has practical significance.","PeriodicalId":205396,"journal":{"name":"2015 International Conference on Computer Science and Mechanical Automation (CSMA)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133683841","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}
Document copy detection is an effective method that can protect intellectual property rights as well as improve the efficiency of information retrieval. To our knowledge, it is a common method that using the fingerprints of one document in the process of detecting. Therefore, selecting the appropriate document fingerprints plays a key role. This paper firstly describes several mature methods of selecting document fingerprints, and analyzes their merit and demerit. Then we review the principle of Fuzzy Hashing, which suffers from the instability and inefficiency of fragmenting. To resolve the critical problems, we finally propose a novel algorithm based on the Fuzzy Hashing. Compared to original method, the proposed document copy detection algorithm can not only ensure the proper size of fragment but also enhance the speed of fragmenting. And in terms of efficiency and accuracy, the algorithm achieves high performance.
{"title":"Document Copy Detection Using the Improved Fuzzy Hashing","authors":"Guohua Wu, Ershuai Fu, Liuyang Wang, Mengmeng Zhao","doi":"10.1109/CSMA.2015.18","DOIUrl":"https://doi.org/10.1109/CSMA.2015.18","url":null,"abstract":"Document copy detection is an effective method that can protect intellectual property rights as well as improve the efficiency of information retrieval. To our knowledge, it is a common method that using the fingerprints of one document in the process of detecting. Therefore, selecting the appropriate document fingerprints plays a key role. This paper firstly describes several mature methods of selecting document fingerprints, and analyzes their merit and demerit. Then we review the principle of Fuzzy Hashing, which suffers from the instability and inefficiency of fragmenting. To resolve the critical problems, we finally propose a novel algorithm based on the Fuzzy Hashing. Compared to original method, the proposed document copy detection algorithm can not only ensure the proper size of fragment but also enhance the speed of fragmenting. And in terms of efficiency and accuracy, the algorithm achieves high performance.","PeriodicalId":205396,"journal":{"name":"2015 International Conference on Computer Science and Mechanical Automation (CSMA)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115682340","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}
Automotive Rear Bridge is one of the key components, 20% of the accident was caused by a driving Rear Bridge, so it is necessary to inspect it strictly before Rear Bridge leave factory and in the process of running. In this paper, the vibration diagnosis method is adopted to realize quality inspection of Rear Bridge. Extracted correctly reflect the running state of the Rear Bridge of characteristic parameters related to the realization of product testing and reliability of detection, this paper adopts the wavelet packet energy method to extract the quality characteristic parameters of Rear Bridge, with its determined Euclidean distance as the Rear Bridge quality detection threshold, if the parameter value in the threshold allowed range far more qualified products, this method can realize the automatic detection, better suited to the needs of the modern production.
{"title":"Vibration Feature Extraction of the Automobile Rear Bridge Basing on Wavelet Packet Energy Method","authors":"Zhiping Zhang, Zixian Zhang","doi":"10.1109/CSMA.2015.46","DOIUrl":"https://doi.org/10.1109/CSMA.2015.46","url":null,"abstract":"Automotive Rear Bridge is one of the key components, 20% of the accident was caused by a driving Rear Bridge, so it is necessary to inspect it strictly before Rear Bridge leave factory and in the process of running. In this paper, the vibration diagnosis method is adopted to realize quality inspection of Rear Bridge. Extracted correctly reflect the running state of the Rear Bridge of characteristic parameters related to the realization of product testing and reliability of detection, this paper adopts the wavelet packet energy method to extract the quality characteristic parameters of Rear Bridge, with its determined Euclidean distance as the Rear Bridge quality detection threshold, if the parameter value in the threshold allowed range far more qualified products, this method can realize the automatic detection, better suited to the needs of the modern production.","PeriodicalId":205396,"journal":{"name":"2015 International Conference on Computer Science and Mechanical Automation (CSMA)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116981756","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}
Designed vacuum cleaning robot body and control system. First, the moving mechanism, transmission and implementing agencies models were established by Pro/E. Parts for the strength check to ensure the security agencies. Then designed based on DSPTMS320LF2812 chip control circuit, including power supply module, the motor driving module and other components. By adjusting the duty cycle of the PWM signal to adjust the motor speed and debug in CCS environment. Finally, the hardware simulation to verify the reliability of the circuit and procedures.
{"title":"Design and Control Research of Vacuuming Robot Cleaning Mechanism","authors":"Yueguang Li, W. Luo, Lei Wang, Lin Sun","doi":"10.1109/CSMA.2015.58","DOIUrl":"https://doi.org/10.1109/CSMA.2015.58","url":null,"abstract":"Designed vacuum cleaning robot body and control system. First, the moving mechanism, transmission and implementing agencies models were established by Pro/E. Parts for the strength check to ensure the security agencies. Then designed based on DSPTMS320LF2812 chip control circuit, including power supply module, the motor driving module and other components. By adjusting the duty cycle of the PWM signal to adjust the motor speed and debug in CCS environment. Finally, the hardware simulation to verify the reliability of the circuit and procedures.","PeriodicalId":205396,"journal":{"name":"2015 International Conference on Computer Science and Mechanical Automation (CSMA)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116905710","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}
With the emergence of big data and cloud computing, data stream arrives rapidly, large-scale and continuously, real-time data stream clustering analysis has become a hot topic in the study on the current data stream mining. Some existing data stream clustering algorithms cannot effectively deal with the high-dimensional data stream and are incompetent to find clusters of arbitrary shape in real-time, as well as the noise points could not be removed timely. To address these issues, this paper proposes PGDC-Stream, a algorithm based on grid and density for clustering data streams in a parallel distributed environment [4]. The algorithm adopts density threshold function to deal with the noise points and inspect and remove them periodically. It also can find clusters of arbitrary shape in large-scale data flow in real-time. The Map-Reduce framework is used for parallel cluster analysis of data streams.
{"title":"Research on Parallel Data Stream Clustering Algorithm Based on Grid and Density","authors":"Weihua Hu, Mingzhong Cheng, Guoping Wu, Liang Wu","doi":"10.1109/CSMA.2015.21","DOIUrl":"https://doi.org/10.1109/CSMA.2015.21","url":null,"abstract":"With the emergence of big data and cloud computing, data stream arrives rapidly, large-scale and continuously, real-time data stream clustering analysis has become a hot topic in the study on the current data stream mining. Some existing data stream clustering algorithms cannot effectively deal with the high-dimensional data stream and are incompetent to find clusters of arbitrary shape in real-time, as well as the noise points could not be removed timely. To address these issues, this paper proposes PGDC-Stream, a algorithm based on grid and density for clustering data streams in a parallel distributed environment [4]. The algorithm adopts density threshold function to deal with the noise points and inspect and remove them periodically. It also can find clusters of arbitrary shape in large-scale data flow in real-time. The Map-Reduce framework is used for parallel cluster analysis of data streams.","PeriodicalId":205396,"journal":{"name":"2015 International Conference on Computer Science and Mechanical Automation (CSMA)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128618285","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}
Random numbers and sequences are widely used in various areas, especially the cryptography for information security. Statistical randomness test is used to evaluate the deviation from randomness. There are lots of statistical randomness tests. However, most of the randomness tests focused on the number of occurrences of pre-specified pattern, and lost the information of the distribution of occurrence position. Hence, in this paper, I proposed a new test focusing on the distribution of occurrence position of pre-specified pattern, and proved it by mathematical method. The experimental results show that there has a consistency between the new test and NIST test suite, and in the sense of the distribution of occurrence position of the pre-specified pattern, the new test has advantage over the NIST test suite.
{"title":"A Randomness Test Based on the Distribution of Position for Pre-Specified Pattern","authors":"Siyi Zhu","doi":"10.1109/CSMA.2015.40","DOIUrl":"https://doi.org/10.1109/CSMA.2015.40","url":null,"abstract":"Random numbers and sequences are widely used in various areas, especially the cryptography for information security. Statistical randomness test is used to evaluate the deviation from randomness. There are lots of statistical randomness tests. However, most of the randomness tests focused on the number of occurrences of pre-specified pattern, and lost the information of the distribution of occurrence position. Hence, in this paper, I proposed a new test focusing on the distribution of occurrence position of pre-specified pattern, and proved it by mathematical method. The experimental results show that there has a consistency between the new test and NIST test suite, and in the sense of the distribution of occurrence position of the pre-specified pattern, the new test has advantage over the NIST test suite.","PeriodicalId":205396,"journal":{"name":"2015 International Conference on Computer Science and Mechanical Automation (CSMA)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123001301","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}
Haozhang Li, Yiteng Zhang, Hongwei Zhang, W. Niu, Yanhui Wang
Hybrid Underwater Gliders (HUGs) are a new type of platform for ocean exploration, with characteristics of low noise, long endurance and high maneuverability. In order to enhance the communication quality of HUGs, the relation between the effective intensity of antenna signal and communication attitude is studied. This paper builds a mathematical model of the effective intensity of antenna signal. Multi-objective optimization is used to figure out the proper amount of hydraulic oil inside in the state of communication in different sea area with corresponding sea density. Then the communication attitude is tested in field trials, indicating that the optimization design of the communication attitude enhances the reliability of HUGs' communication and strengthens its environmental self-adaption.
{"title":"Optimization Design of the Communication Attitude for Hybrid Underwater Gliders","authors":"Haozhang Li, Yiteng Zhang, Hongwei Zhang, W. Niu, Yanhui Wang","doi":"10.1109/CSMA.2015.30","DOIUrl":"https://doi.org/10.1109/CSMA.2015.30","url":null,"abstract":"Hybrid Underwater Gliders (HUGs) are a new type of platform for ocean exploration, with characteristics of low noise, long endurance and high maneuverability. In order to enhance the communication quality of HUGs, the relation between the effective intensity of antenna signal and communication attitude is studied. This paper builds a mathematical model of the effective intensity of antenna signal. Multi-objective optimization is used to figure out the proper amount of hydraulic oil inside in the state of communication in different sea area with corresponding sea density. Then the communication attitude is tested in field trials, indicating that the optimization design of the communication attitude enhances the reliability of HUGs' communication and strengthens its environmental self-adaption.","PeriodicalId":205396,"journal":{"name":"2015 International Conference on Computer Science and Mechanical Automation (CSMA)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126471566","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 positioning accuracy of the traditional GPS single point positioning is lower and applies only to the occasion of the low accuracy of the positioning. With the development of GPS positioning technology, the requirements for the positioning accuracy are also constantly improving, using differential GPS technology can improve the positioning accuracy significantly. We can learn from differential GPS that, in order to implement amendments to the user positioning results, base station sends differential corrections to the user station, which can improve the positioning accuracy. Forming differential correction is the key technical problems in differential GPS system. This paper introduces three different differential GPS methods: differential position, differential pseudo range and differential carrier phase, explains the fundamentals and introduces the specific algorithm for differential corrections. We draw the following conclusions by comparing these three different methods: Differential position is simple but the accuracy is lower, differential pseudo range is less limited and the accuracy is moderate, so it is the most widely used differential positioning method, differential carrier phase has the highest accuracy but is more limited.
{"title":"Study on Differential GPS Positioning Methods","authors":"Mingqin Shao, Xiuping Sui","doi":"10.1109/CSMA.2015.51","DOIUrl":"https://doi.org/10.1109/CSMA.2015.51","url":null,"abstract":"The positioning accuracy of the traditional GPS single point positioning is lower and applies only to the occasion of the low accuracy of the positioning. With the development of GPS positioning technology, the requirements for the positioning accuracy are also constantly improving, using differential GPS technology can improve the positioning accuracy significantly. We can learn from differential GPS that, in order to implement amendments to the user positioning results, base station sends differential corrections to the user station, which can improve the positioning accuracy. Forming differential correction is the key technical problems in differential GPS system. This paper introduces three different differential GPS methods: differential position, differential pseudo range and differential carrier phase, explains the fundamentals and introduces the specific algorithm for differential corrections. We draw the following conclusions by comparing these three different methods: Differential position is simple but the accuracy is lower, differential pseudo range is less limited and the accuracy is moderate, so it is the most widely used differential positioning method, differential carrier phase has the highest accuracy but is more limited.","PeriodicalId":205396,"journal":{"name":"2015 International Conference on Computer Science and Mechanical Automation (CSMA)","volume":"365 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131521147","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}
A virtual prototype model of a McPherson front suspension is built that is used of ADAMS/Car and based on multi-body system dynamics and conducted the parallel wheel travel simulation. After sensitivity analysis of suspension design factor and optimization of multiple iterations using ADAMS/Insight, the design factor parameter that has great influence for the optimization goal sensitivity is found under the optimization constraints finally. The problem of suspension positioning parameters optimization is better solved by optimizing the design factor parameters.
{"title":"Optimization of Positioning Parameters for McPherson Front Suspension Based on ADAMS/Car","authors":"Jingjun Zhang, X. Jia, Ziyue Zhao, Ruizhen Gao","doi":"10.1109/CSMA.2015.66","DOIUrl":"https://doi.org/10.1109/CSMA.2015.66","url":null,"abstract":"A virtual prototype model of a McPherson front suspension is built that is used of ADAMS/Car and based on multi-body system dynamics and conducted the parallel wheel travel simulation. After sensitivity analysis of suspension design factor and optimization of multiple iterations using ADAMS/Insight, the design factor parameter that has great influence for the optimization goal sensitivity is found under the optimization constraints finally. The problem of suspension positioning parameters optimization is better solved by optimizing the design factor parameters.","PeriodicalId":205396,"journal":{"name":"2015 International Conference on Computer Science and Mechanical Automation (CSMA)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128105395","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}
Aiming at the large bias of LSE (Least Squares Estimation) in estimating MTBF (mean time between failures) under a small sample of data, a Bayesian MTBF estimating method is proposed for NC (numerical control) machine tools. To solve difficulty in directly presenting the prior distributions of Weibull parameters, an expert-judgment method which incorporates prior information is developed to indirectly obtain Weibull parameters' prior distributions. Aiming at the problem that analytic solutions to Weibull parameters' posterior distributions and estimators are impossible to obtain, a Metropolis algorithm is developed. The iteration procedure of the algorithm is presented, the posterior distribution of each parameter is simulated, and the parameter estimators and MTBF are obtained. Given the actual MTBF as standard value, the proposed method and LSE are applied to the same real case respectively. The results indicate that when sample size n≤10, relative errors of the proposed method lie between 4.43% and 7.19%, which are smaller than those of LSE. The proposed Bayesian MTBF estimating method is better than LSE and suitable for NC machine tools under small samples.
{"title":"Comparison between Bayesian Method and LSE in Estimating MTBF of NC Machine Tools","authors":"Ying-nan Kan, Xiaocui Zhu, Lihui Wang, Binbin Xu, Zhaojun Yang, Hong-zhou Li","doi":"10.1109/CSMA.2015.57","DOIUrl":"https://doi.org/10.1109/CSMA.2015.57","url":null,"abstract":"Aiming at the large bias of LSE (Least Squares Estimation) in estimating MTBF (mean time between failures) under a small sample of data, a Bayesian MTBF estimating method is proposed for NC (numerical control) machine tools. To solve difficulty in directly presenting the prior distributions of Weibull parameters, an expert-judgment method which incorporates prior information is developed to indirectly obtain Weibull parameters' prior distributions. Aiming at the problem that analytic solutions to Weibull parameters' posterior distributions and estimators are impossible to obtain, a Metropolis algorithm is developed. The iteration procedure of the algorithm is presented, the posterior distribution of each parameter is simulated, and the parameter estimators and MTBF are obtained. Given the actual MTBF as standard value, the proposed method and LSE are applied to the same real case respectively. The results indicate that when sample size n≤10, relative errors of the proposed method lie between 4.43% and 7.19%, which are smaller than those of LSE. The proposed Bayesian MTBF estimating method is better than LSE and suitable for NC machine tools under small samples.","PeriodicalId":205396,"journal":{"name":"2015 International Conference on Computer Science and Mechanical Automation (CSMA)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134585204","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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