Pub Date : 2018-07-01DOI: 10.1109/IMCCC.2018.00198
Heng-chao Sun, Hong-jian Lv, Min Liu, Li-Na Wang
The previous research paid less attention to the similarity characteristics of gas liquid two-phase flow in space rocket engine thrust chamber, and the droplet motion analysis based on gas flow had never been carried out. In this paper, firstly a numerical analysis model about gas flow in thrust chamber is built and the gas flow similarity is deduced, then a dimensionless calculation expression is promoted to describe the gas flow velocity. Secondly, a numerical analysis model about droplet motion in thrust chamber is built, taking the gas flow as input. Lastly, the effects of the combustion length diameter ratio and outlet throat area ratio on the droplet trajectory and velocity are discussed. The analysis method, that is given in this paper and used to investigate into the droplet motion and gas flow in space rocket engine thrust chamber, has certain reference value for space rocket engine test and engineering design.
{"title":"Droplet Motion Analysis in Space Rocket Engine Combustion Chamber Based on Gas Flow Similarity","authors":"Heng-chao Sun, Hong-jian Lv, Min Liu, Li-Na Wang","doi":"10.1109/IMCCC.2018.00198","DOIUrl":"https://doi.org/10.1109/IMCCC.2018.00198","url":null,"abstract":"The previous research paid less attention to the similarity characteristics of gas liquid two-phase flow in space rocket engine thrust chamber, and the droplet motion analysis based on gas flow had never been carried out. In this paper, firstly a numerical analysis model about gas flow in thrust chamber is built and the gas flow similarity is deduced, then a dimensionless calculation expression is promoted to describe the gas flow velocity. Secondly, a numerical analysis model about droplet motion in thrust chamber is built, taking the gas flow as input. Lastly, the effects of the combustion length diameter ratio and outlet throat area ratio on the droplet trajectory and velocity are discussed. The analysis method, that is given in this paper and used to investigate into the droplet motion and gas flow in space rocket engine thrust chamber, has certain reference value for space rocket engine test and engineering design.","PeriodicalId":328754,"journal":{"name":"2018 Eighth International Conference on Instrumentation & Measurement, Computer, Communication and Control (IMCCC)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133655714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-01DOI: 10.1109/IMCCC.2018.00078
Wei Xue, Ping Jiang
Aiming at the problem that the accuracy and stability of indoor positioning navigation can not meet the requirements of engineering, a navigation method based on UWB positioning is designed. First of all, in view of the positioning error of UWB, the TOF algorithm is applied to measure distance, and an algorithm of inner quadrilateral positioning is proposed to improve the positioning accuracy. Secondly, In the aspect of the large deviation of navigation direction, the dead reckoning algorithm based on nine-axis module surveying angle and encoder range are designed, which effectively settle the problem of zero drift and improve the navigation precision. Finally, an integrated navigation algorithm is proposed, it combines the advantages of UWB positioning technology and dead reckoning. This method can improve the performance of positioning navigation effectively. The system can carry out indoor positioning navigation stably, rapidly and accurately through practice.
{"title":"The Research on Navigation Technology of Dead Reckoning Based on UWB Localization","authors":"Wei Xue, Ping Jiang","doi":"10.1109/IMCCC.2018.00078","DOIUrl":"https://doi.org/10.1109/IMCCC.2018.00078","url":null,"abstract":"Aiming at the problem that the accuracy and stability of indoor positioning navigation can not meet the requirements of engineering, a navigation method based on UWB positioning is designed. First of all, in view of the positioning error of UWB, the TOF algorithm is applied to measure distance, and an algorithm of inner quadrilateral positioning is proposed to improve the positioning accuracy. Secondly, In the aspect of the large deviation of navigation direction, the dead reckoning algorithm based on nine-axis module surveying angle and encoder range are designed, which effectively settle the problem of zero drift and improve the navigation precision. Finally, an integrated navigation algorithm is proposed, it combines the advantages of UWB positioning technology and dead reckoning. This method can improve the performance of positioning navigation effectively. The system can carry out indoor positioning navigation stably, rapidly and accurately through practice.","PeriodicalId":328754,"journal":{"name":"2018 Eighth International Conference on Instrumentation & Measurement, Computer, Communication and Control (IMCCC)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122227046","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 rapid development and popularization of cloud computing, the security multiparty computation becomes a hot issue for the current research. This paper combs and analyzes the research of general security multiparty computation in cloud computing environment, and introduces the solution encryption schemes, including multi-key fully homomorphic encryption scheme based on Learning with errors and multi-key fully homomorphic attribute-based encryption scheme. This paper discusses the directions for future works in the end.
{"title":"Secure Multiparty Computation via Fully Homomorphic Encryption Scheme","authors":"Jing-li Han, Zhao-li Wang, Ya-qing Shi, Meijuan Wang, Hui Dong","doi":"10.1109/IMCCC.2018.00060","DOIUrl":"https://doi.org/10.1109/IMCCC.2018.00060","url":null,"abstract":"With the rapid development and popularization of cloud computing, the security multiparty computation becomes a hot issue for the current research. This paper combs and analyzes the research of general security multiparty computation in cloud computing environment, and introduces the solution encryption schemes, including multi-key fully homomorphic encryption scheme based on Learning with errors and multi-key fully homomorphic attribute-based encryption scheme. This paper discusses the directions for future works in the end.","PeriodicalId":328754,"journal":{"name":"2018 Eighth International Conference on Instrumentation & Measurement, Computer, Communication and Control (IMCCC)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116879050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-01DOI: 10.1109/IMCCC.2018.00309
Kai Li, F. Yuan
Industrial monocular area CCD camera is now playing a remarkable role in the fields of spatial target position and velocity measurement. To overcome the measurement nonlinearities and the process uncertainties, and to improve the precision of target positioning, a set of triangle combination target is employed, the calibration principles of Zhang is utilized, and the idea of combination measurement is proposed by using three focal spots as cooperative target. The experiment shows the position measuring error can be decreased within 2 magnitude, and the effectiveness of such methods is verified.
{"title":"Spatial Target Position Calibration and Combination Measurement Using Monocular CCD Camera","authors":"Kai Li, F. Yuan","doi":"10.1109/IMCCC.2018.00309","DOIUrl":"https://doi.org/10.1109/IMCCC.2018.00309","url":null,"abstract":"Industrial monocular area CCD camera is now playing a remarkable role in the fields of spatial target position and velocity measurement. To overcome the measurement nonlinearities and the process uncertainties, and to improve the precision of target positioning, a set of triangle combination target is employed, the calibration principles of Zhang is utilized, and the idea of combination measurement is proposed by using three focal spots as cooperative target. The experiment shows the position measuring error can be decreased within 2 magnitude, and the effectiveness of such methods is verified.","PeriodicalId":328754,"journal":{"name":"2018 Eighth International Conference on Instrumentation & Measurement, Computer, Communication and Control (IMCCC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131012555","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 paper verifies the self-recovery effect of NAND flash by experiments and proposes the concept of relaxation time (tr) based on self-recovery effect. Moreover, the change rule of data retention error under different degrees of self-recovery effect for blocks with different program/erase stresses is also studied. First of all, the growth trend of NAND flash storage data retention error is significantly reduced by increasing the tr value. Experiments show that when tr is 6h, the retention error is reduced by about 60% compared with the retention error under 0h's tr at the same retention days. In addition, as tr increases, the NAND flash self-recovery effect will reach saturation. The experimental results show that when tr is around 2h, increasing tr will not play a significant role in reducing retention error
{"title":"The Influence of NAND Flash Self-Recovery Effect on Retention Error","authors":"Debao Wei, Xujin Li, Lina Niu, Liyan Qiao, Xiyuan Peng","doi":"10.1109/IMCCC.2018.00363","DOIUrl":"https://doi.org/10.1109/IMCCC.2018.00363","url":null,"abstract":"This paper verifies the self-recovery effect of NAND flash by experiments and proposes the concept of relaxation time (tr) based on self-recovery effect. Moreover, the change rule of data retention error under different degrees of self-recovery effect for blocks with different program/erase stresses is also studied. First of all, the growth trend of NAND flash storage data retention error is significantly reduced by increasing the tr value. Experiments show that when tr is 6h, the retention error is reduced by about 60% compared with the retention error under 0h's tr at the same retention days. In addition, as tr increases, the NAND flash self-recovery effect will reach saturation. The experimental results show that when tr is around 2h, increasing tr will not play a significant role in reducing retention error","PeriodicalId":328754,"journal":{"name":"2018 Eighth International Conference on Instrumentation & Measurement, Computer, Communication and Control (IMCCC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132895045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-01DOI: 10.1109/IMCCC.2018.00090
Xinglong Han, Manli Li, Xuming Zhang
Aimed at the challenges faced by spacecraft general assembly process management under 3D design condition, this paper analyzes the application demands for the construction of process system based on 3D model, puts forward the overall framework of spacecraft general assembly process system, as well as gives ideas and methods for key technical problems in system implementation.
{"title":"A Study of Spacecraft Assembly Process System Framework and Key Technology","authors":"Xinglong Han, Manli Li, Xuming Zhang","doi":"10.1109/IMCCC.2018.00090","DOIUrl":"https://doi.org/10.1109/IMCCC.2018.00090","url":null,"abstract":"Aimed at the challenges faced by spacecraft general assembly process management under 3D design condition, this paper analyzes the application demands for the construction of process system based on 3D model, puts forward the overall framework of spacecraft general assembly process system, as well as gives ideas and methods for key technical problems in system implementation.","PeriodicalId":328754,"journal":{"name":"2018 Eighth International Conference on Instrumentation & Measurement, Computer, Communication and Control (IMCCC)","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134099763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-01DOI: 10.1109/IMCCC.2018.00049
Ting Yong, Jinhui Li, Zibin Wang, Ling Pang
In this paper, according to the research on the smart antenna of adaptive signal processing technology, using LM-S algorithm to simulate the adaptive smart antenna array to verify its performance under harsh conditions to analyze its application in the actual situation; And through fusion with the transform domain filtering technology to solve the smart antenna useful signal and interference signal wave arrival direction is the same that the beamforming algorithm can not filter the interference signal problem.
{"title":"Application of Adaptive Digital Processing Technology in Smart Antenna Array","authors":"Ting Yong, Jinhui Li, Zibin Wang, Ling Pang","doi":"10.1109/IMCCC.2018.00049","DOIUrl":"https://doi.org/10.1109/IMCCC.2018.00049","url":null,"abstract":"In this paper, according to the research on the smart antenna of adaptive signal processing technology, using LM-S algorithm to simulate the adaptive smart antenna array to verify its performance under harsh conditions to analyze its application in the actual situation; And through fusion with the transform domain filtering technology to solve the smart antenna useful signal and interference signal wave arrival direction is the same that the beamforming algorithm can not filter the interference signal problem.","PeriodicalId":328754,"journal":{"name":"2018 Eighth International Conference on Instrumentation & Measurement, Computer, Communication and Control (IMCCC)","volume":"28 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133171058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-01DOI: 10.1109/IMCCC.2018.00205
Mingyu Gao, Shuang Wu, Yuxiang Yang, Jiye Huang
The traditional crop classification uses artificial method all along, which has high cost and low efficiency. An automatic sorting method based on machine vision is proposed in this paper. Firstly, the non-uniformity correction of the CCD original signal is performed. Then the correction signal is converted from RGB color space to HSV space. The floodfill algorithm can obtain target pixel threshold value. The threshold segmentation data of the HSV color space is used to extract the target material. Finally all the pixels of the full image are divided to determine the location of the target material. The purpose of sorting the color and size of the material is achieved.
{"title":"A Color Selection Method for Crops Based on Machine Vision","authors":"Mingyu Gao, Shuang Wu, Yuxiang Yang, Jiye Huang","doi":"10.1109/IMCCC.2018.00205","DOIUrl":"https://doi.org/10.1109/IMCCC.2018.00205","url":null,"abstract":"The traditional crop classification uses artificial method all along, which has high cost and low efficiency. An automatic sorting method based on machine vision is proposed in this paper. Firstly, the non-uniformity correction of the CCD original signal is performed. Then the correction signal is converted from RGB color space to HSV space. The floodfill algorithm can obtain target pixel threshold value. The threshold segmentation data of the HSV color space is used to extract the target material. Finally all the pixels of the full image are divided to determine the location of the target material. The purpose of sorting the color and size of the material is achieved.","PeriodicalId":328754,"journal":{"name":"2018 Eighth International Conference on Instrumentation & Measurement, Computer, Communication and Control (IMCCC)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133209581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-01DOI: 10.1109/IMCCC.2018.00265
Ruihong Wang, Yongliang Wu, Youmin Gong
Due to hypersonic vehicle's high velocity, large attitude maneuver and wide envelope, unreasonable antenna layout will lead to bad performance of satellite navigation, such as the reduction of received GNSS satellite numbers or even non-positioning. In this paper, a GNSS antenna layout evaluation method for hypersonic vehicle is proposed to handle this problem. A hypersonic vehicle mission simulation and GNSS antenna layout evaluation environment based on STK/Matlab is established to validate the method, including the aircraft's typical trajectory and attitude data, navigation satellite constellation, and two different antenna layout models. The advantages and disadvantages of the two antenna layouts are analyzed. Based on the proposed method, the proper antenna layout which meets the flight safety and mission requirements is found out by calculating the receiving satellite numbers and PDOP of the GNSS receiver.
{"title":"A GNSS Antenna Layout Evaluation Method for Hypersonic Vehicle","authors":"Ruihong Wang, Yongliang Wu, Youmin Gong","doi":"10.1109/IMCCC.2018.00265","DOIUrl":"https://doi.org/10.1109/IMCCC.2018.00265","url":null,"abstract":"Due to hypersonic vehicle's high velocity, large attitude maneuver and wide envelope, unreasonable antenna layout will lead to bad performance of satellite navigation, such as the reduction of received GNSS satellite numbers or even non-positioning. In this paper, a GNSS antenna layout evaluation method for hypersonic vehicle is proposed to handle this problem. A hypersonic vehicle mission simulation and GNSS antenna layout evaluation environment based on STK/Matlab is established to validate the method, including the aircraft's typical trajectory and attitude data, navigation satellite constellation, and two different antenna layout models. The advantages and disadvantages of the two antenna layouts are analyzed. Based on the proposed method, the proper antenna layout which meets the flight safety and mission requirements is found out by calculating the receiving satellite numbers and PDOP of the GNSS receiver.","PeriodicalId":328754,"journal":{"name":"2018 Eighth International Conference on Instrumentation & Measurement, Computer, Communication and Control (IMCCC)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133044347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-01DOI: 10.1109/IMCCC.2018.00273
Zhiyuan Du, Zhe-Huan Jin, Yun Bo
Data distribution management module based on content filtering combined content-based filtering algorithm and a parallel distribution algorithm, which can complete content filter in the process of running the system as well as reduce waiting time of subscribe nodes, so this method is suitable for applications where the requirement of data filtering capability is high. A test system is built based on joint test platform to verify the function of the software. The results of the test indicate that this software is characterized with complete function, stable performance. The data distribution management module can provide a flexible expression of interested data, reduce the network load, and improve the efficiency of data transmission. The method has the wide application for the middleware joint test platform.
{"title":"Content Filtering-Based Data Distribution for Middleware Joint Test Platform","authors":"Zhiyuan Du, Zhe-Huan Jin, Yun Bo","doi":"10.1109/IMCCC.2018.00273","DOIUrl":"https://doi.org/10.1109/IMCCC.2018.00273","url":null,"abstract":"Data distribution management module based on content filtering combined content-based filtering algorithm and a parallel distribution algorithm, which can complete content filter in the process of running the system as well as reduce waiting time of subscribe nodes, so this method is suitable for applications where the requirement of data filtering capability is high. A test system is built based on joint test platform to verify the function of the software. The results of the test indicate that this software is characterized with complete function, stable performance. The data distribution management module can provide a flexible expression of interested data, reduce the network load, and improve the efficiency of data transmission. The method has the wide application for the middleware joint test platform.","PeriodicalId":328754,"journal":{"name":"2018 Eighth International Conference on Instrumentation & Measurement, Computer, Communication and Control (IMCCC)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128996919","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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