{"title":"An Outer Voltage-Loop Flux-Weakening Control Based on Over-Modulation of the Permanent Magnet Synchronous Motor","authors":"Jiakun Lin, Qunzhang Tu, Xia Feng, Kejun Duan","doi":"10.1109/CSMA.2015.64","DOIUrl":"https://doi.org/10.1109/CSMA.2015.64","url":null,"abstract":"Researched on the permanent magnet synchronous motor (PMSM) for the electric-drive tracked bulldozer, an outer voltage-loop flux-weakening control strategy based on over-modulation, which is an organic combination of the traditional outer voltage-loop flux-weakening control and over-modulation algorithm, is presented in this paper. The simulation and the experiment of the control strategy are carried out. Compared to the general flux-weakening control strategy, this strategy can make the DC bus voltage be fully utilized, so that the motor can be maintained at the maximum linear modulation under the steady-state condition. The responsiveness of the motor is realized to improve effectively, and the efficiency of the motor control system is maintained in a high range. The feasibility of the strategy is verified through comparison. This paper provides the basis for the study of the high-performance control of the PMSM for the electric-drive tracked bulldozer.","PeriodicalId":205396,"journal":{"name":"2015 International Conference on Computer Science and Mechanical Automation (CSMA)","volume":"59 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":"132623759","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}
{"title":"Programming to Achieve the Reception Extraction and Translation of GPS Positioning Information","authors":"Mingqin Shao, Xuelin Yang","doi":"10.1109/CSMA.2015.52","DOIUrl":"https://doi.org/10.1109/CSMA.2015.52","url":null,"abstract":"There is a large amount of information within every group of the received GPS positioning information, Users only need to extract and translate the useful information for them, this can be achieved by computer programs. The GPS information extraction follows the NMEA0183 standard, this paper writes a simple MFC dialog-based program based on the serial communications and GPS communication protocols. The program can be used to extract and translate GPS positioning information, store the positioning information and calculate the differential correction and then present the positioning results to users. This paper describes the function of each part and implementation methods of the program.","PeriodicalId":205396,"journal":{"name":"2015 International Conference on Computer Science and Mechanical Automation (CSMA)","volume":"9 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":"124221715","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}
{"title":"Fusion of Polarization Image Using Bidimensional Empirical Mode Decomposition","authors":"Dexiang Zhang, Jiaxing Li, Zihong Chen, Jingjing Zhang","doi":"10.1109/CSMA.2015.48","DOIUrl":"https://doi.org/10.1109/CSMA.2015.48","url":null,"abstract":"Empirical mode decomposition (EMD) provides a powerful tool for adaptive multiscale analysis of nonstationary signals. Bidimensional empirical mode decomposition (BEMD) techniques decompose an image into several bidimensional intrinsic mode functions (BIMFs) and a bidimensional residue (BR). Firstly, several polarization images can be decomposed into several BIMFs with multi-scales using BEMD. For the BIMF coefficients, the teager energy-based method is used. For the each BIMF coefficients, the area-based teager energy larger value of information measurement is used to select the better coefficients for fusion. At last the fused image can be obtained by utilizing inverse transform for fused image. Experimental results show that the proposed algorithm gives more satisfactory results than the traditional image fusion algorithms in preserving the edges and texture information.","PeriodicalId":205396,"journal":{"name":"2015 International Conference on Computer Science and Mechanical Automation (CSMA)","volume":"22 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":"115245006","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}
{"title":"Research of Crane Scheduling Based on Birth and Death Chain in the Production Shop Field","authors":"Xijuan Yang, Suoping Li","doi":"10.1109/CSMA.2015.56","DOIUrl":"https://doi.org/10.1109/CSMA.2015.56","url":null,"abstract":"The crane scheduling model based on birth and death chain is established in this paper through analysis of the working process of the cranes and dispatching rules. According to the model, the equilibrium conditions of the system are analyzed. And probabilistic characteristics and the performances in steady-state are calculated. Furthermore, the numerical test cases are applied to testify the effectiveness of the proposed methods. The computational simulation results show that the proposed methods are efficiency, and provide a way to calculate the critical parameters of steady-state and the best number of cranes.","PeriodicalId":205396,"journal":{"name":"2015 International Conference on Computer Science and Mechanical Automation (CSMA)","volume":"18 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":"114234191","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}
Guohua Wu, Liuyang Wang, Nailiang Zhao, Hairong Lin
{"title":"Improved Expected Cross Entropy Method for Text Feature Selection","authors":"Guohua Wu, Liuyang Wang, Nailiang Zhao, Hairong Lin","doi":"10.1109/CSMA.2015.17","DOIUrl":"https://doi.org/10.1109/CSMA.2015.17","url":null,"abstract":"Feature selection plays an important role in text categorization, and contributes directly to the accuracy of the categorization. In the process of feature selection, due to the lack of consideration of the traditional expected cross entropy algorithm for document frequency, we first improve the expected cross entropy formula of the traditional, and then propose an improved text feature selection based on the text word frequency information. The method is modified by the expected cross entropy algorithm in three aspects of the frequency of features within category, the frequency distribution within category and the frequency distribution among different categories. The result of text categorization show that improved expected cross entropy feature selection approach has a more excellent effect in text categorization.","PeriodicalId":205396,"journal":{"name":"2015 International Conference on Computer Science and Mechanical Automation (CSMA)","volume":"11 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":"131753374","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}
Bo Hu, Ruiyuan Zhang, Wenliang Zhang, Yiteng Zhang
{"title":"Optimization and Simulation of Propeller Propulsion System for Hybrid Underwater Glider","authors":"Bo Hu, Ruiyuan Zhang, Wenliang Zhang, Yiteng Zhang","doi":"10.1109/CSMA.2015.67","DOIUrl":"https://doi.org/10.1109/CSMA.2015.67","url":null,"abstract":"Hybrid Underwater Gliders (HUGs) integrate advantages of Autonomous Underwater Gliders (AUGs) with those of Autonomous Underwater Vehicles (AUVs). HUGs with buoyancy engine and the auxiliary propeller, compared with traditional AUGs, get more various and optimal motion modes, including glide in a saw tooth path with single buoyancy engine, thrust as traditional AUVs with single propeller, and power glide with both buoyancy engine and propeller. In this paper, propeller propulsion system of HUGs, Petrel II, is designed. Dynamic model is established and motion modes are studied. Simulations and field trials validate that abundant motion modes improve motion ability of HUGs and expands the application value of HUGs.","PeriodicalId":205396,"journal":{"name":"2015 International Conference on Computer Science and Mechanical Automation (CSMA)","volume":"1 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":"130298569","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}
{"title":"Rolling Thickness Prediction Based on the Extreme Learning Machine and Clustering","authors":"Li Wang, Linlin Fan, Na Lu, X. Cui, Yonghong Xie","doi":"10.1109/CSMA.2015.13","DOIUrl":"https://doi.org/10.1109/CSMA.2015.13","url":null,"abstract":"The accuracy of thickness is an important standard to measure the strip quality. Therefore, it is crucial to accurately obtain a high precision thickness. The ELM (extreme learning machine) based on clustering forecast method is presented for hot rolled strip thickness prediction. Firstly, strong correlation properties of thickness are obtained by data pretreatment, in order to ensure the effectiveness of the thickness model. Then, a clustering analysis is made about the strong correlation attribute data. Finally, ELM network is performed respectively for each type of prediction. This paper uses filed production data for training and testing, and takes the BP network prediction model as comparison. The simulation results show that this method can predict the thickness more quickly and accurately, and better meet the needs of actual production.","PeriodicalId":205396,"journal":{"name":"2015 International Conference on Computer Science and Mechanical Automation (CSMA)","volume":"11 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":"134224150","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}
{"title":"Measurement Method for Complex Shape of Hydraulic Turbine Blade Using Binocular Vision","authors":"Zhenwei Wang, Fang Fan, Shuangyin Liu","doi":"10.1109/CSMA.2015.76","DOIUrl":"https://doi.org/10.1109/CSMA.2015.76","url":null,"abstract":"In industrial practices, there are lots of parts or components with complex shape, such as hydraulic blade, propeller, etc. Thus, rapid measurement for those parts or components will affect the production cycle and cost greatly. In this paper, we introduce the binocular vision to measure the hydraulic blade. First, the camera calibration is conducted to calculate intrinsic and external camera parameters, and two images are obtained from different views. Then, the stereo matching is discussed in detail, such as feature extraction, detection, constraints and so on. Thirdly, we reconstruct the geometric model based on above analysis using NURBS. This method is a non-contact method, which can improve the measurement efficiency and enhance measurement flexibility.","PeriodicalId":205396,"journal":{"name":"2015 International Conference on Computer Science and Mechanical Automation (CSMA)","volume":"2 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":"130867371","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}
{"title":"An Overview of Study of Passowrd Cracking","authors":"Fei Yu, Yulei Huang","doi":"10.1109/CSMA.2015.12","DOIUrl":"https://doi.org/10.1109/CSMA.2015.12","url":null,"abstract":"This paper studies the current status and advance of study of password cracking. First, we give a classification for password cracking from different dimensions. We studies brute-force cracking, dictionary cracking and rainbow table cracking. We found some new techniques such as brute-force cracking based on probability method, Markov models and data mining. High performance computing in password cracking is also studied, we found that more and more password cracking system using GPU platform or FPGA platform. We indicate that the password cracking techniques will develop with the growth of computing technology. The integration of various methods will increase the speed and success probability of password cracking.","PeriodicalId":205396,"journal":{"name":"2015 International Conference on Computer Science and Mechanical Automation (CSMA)","volume":"56 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":"130228394","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}
Peiqing Liu, Fenlin Liu, Chunfang Yang, Xiaofeng Song
{"title":"Improving Steganalysis by Fusing SVM Classifiers for JPEG Images","authors":"Peiqing Liu, Fenlin Liu, Chunfang Yang, Xiaofeng Song","doi":"10.1109/CSMA.2015.44","DOIUrl":"https://doi.org/10.1109/CSMA.2015.44","url":null,"abstract":"As the present fusing strategies cannot utilize the correlation of different detection results for image steganography effectively, a steganalysis method is proposed based on fusing SVM classifiers. Firstly, different feature subsets are used for the training of SVM classifiers. Secondly, the detection results of multi-classifiers are utilized to train a fusing classifier, the fusing classifier can learn the correlation and diversity of detection results of sub-classifiers. From the experimental result, it can be seen that the proposed steganalysis method can achieve better detection performance for J-UNIWARD steganography compared with voting and Bayesian methods.","PeriodicalId":205396,"journal":{"name":"2015 International Conference on Computer Science and Mechanical Automation (CSMA)","volume":"61 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":"114331759","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}