Pub Date : 2016-10-01DOI: 10.1109/COMPCOMM.2016.7924872
Jianwei Tian, Hong Qiao, Xi Li, Zheng Tian
With the rapid development of Web technology, security attacks are growing day by day. It is difficult but important to detect these threats, especially the statistical type like brute force. This paper proposes a statistical threat detection method based on dynamic time threshold. Firstly, the study constructs the framework of collecting and preprocessing the massive log. Then threat detecting method with dynamic time threshold based on MapReduce framework is presented.
{"title":"A statistical threat detection method based on dynamic time threshold","authors":"Jianwei Tian, Hong Qiao, Xi Li, Zheng Tian","doi":"10.1109/COMPCOMM.2016.7924872","DOIUrl":"https://doi.org/10.1109/COMPCOMM.2016.7924872","url":null,"abstract":"With the rapid development of Web technology, security attacks are growing day by day. It is difficult but important to detect these threats, especially the statistical type like brute force. This paper proposes a statistical threat detection method based on dynamic time threshold. Firstly, the study constructs the framework of collecting and preprocessing the massive log. Then threat detecting method with dynamic time threshold based on MapReduce framework is presented.","PeriodicalId":210833,"journal":{"name":"2016 2nd IEEE International Conference on Computer and Communications (ICCC)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114225720","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 : 2016-10-01DOI: 10.1109/COMPCOMM.2016.7924880
Ziqin Su, Qiaoyong Qiu, Hua Zhou
Time-invariant low-density parity-check convolutional codes (TI LDPC-CCs) can be represented by a polynomial-domain parity-check matrix derived from the corresponding quasi-cyclic (QC) LDPC block codes (LDPC-BCs), while time-varying (TV) LDPC-CCs can be obtained by unwrapping the parity-check matrices of LDPC-BCs. The cycle enumerators for TI and TV LDPC-CCs are compared. Based on the analysis of the graphical structures of short cycles in HT(D), we introduce a method of designing the polynomial syndrome former matrix HCRT(D) for LDPC-CCs. It eliminates short cycles and shows improved decoding performance on an additive white Gaussian noise (AWGN) channel with lower bit error ratio (BER) curves.
{"title":"Analysis and elimination of short cycles in LDPC convolutional codes","authors":"Ziqin Su, Qiaoyong Qiu, Hua Zhou","doi":"10.1109/COMPCOMM.2016.7924880","DOIUrl":"https://doi.org/10.1109/COMPCOMM.2016.7924880","url":null,"abstract":"Time-invariant low-density parity-check convolutional codes (TI LDPC-CCs) can be represented by a polynomial-domain parity-check matrix derived from the corresponding quasi-cyclic (QC) LDPC block codes (LDPC-BCs), while time-varying (TV) LDPC-CCs can be obtained by unwrapping the parity-check matrices of LDPC-BCs. The cycle enumerators for TI and TV LDPC-CCs are compared. Based on the analysis of the graphical structures of short cycles in HT(D), we introduce a method of designing the polynomial syndrome former matrix HCRT(D) for LDPC-CCs. It eliminates short cycles and shows improved decoding performance on an additive white Gaussian noise (AWGN) channel with lower bit error ratio (BER) curves.","PeriodicalId":210833,"journal":{"name":"2016 2nd IEEE International Conference on Computer and Communications (ICCC)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114248587","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 : 2016-10-01DOI: 10.1109/COMPCOMM.2016.7924993
J. D. Lin, Z. Qian, W. Cao, Q. Wang, J. Jin
One microstrip antenna array with artificial electromagnetic structure to produce the wideband wide-beam and high-gain circularly polarized radiation characteristics is proposed in this paper. The antenna array is composed of multi-layers and fed through a 1-to-4 Wilkinson power divider phase shift network to generate a circularly polarized wave. Meanwhile, plated-through pins to the ground, connected by the square ring, are employed to achieve the wide beamwidth radiation. The antenna is designed to operate at around 12 GHz. It can achieve an impedance bandwidth (|S11|<−10 dB) of 10.8–13.4 GHz and a 3-dB AR bandwidth of 10.9–13.5 GHz. The antenna showed a right-hand circular polarization (RHCP) radiation with a wide half-power beamwidth (>100°), a wide 3-dB axial-ratio beamwidth (>90°) and a high radiation gain (>5dB) within the operational bandwidth.
{"title":"Wideband wide-beam high gain circularly polarized microstrip antenna array with artificial electromagnetic structure","authors":"J. D. Lin, Z. Qian, W. Cao, Q. Wang, J. Jin","doi":"10.1109/COMPCOMM.2016.7924993","DOIUrl":"https://doi.org/10.1109/COMPCOMM.2016.7924993","url":null,"abstract":"One microstrip antenna array with artificial electromagnetic structure to produce the wideband wide-beam and high-gain circularly polarized radiation characteristics is proposed in this paper. The antenna array is composed of multi-layers and fed through a 1-to-4 Wilkinson power divider phase shift network to generate a circularly polarized wave. Meanwhile, plated-through pins to the ground, connected by the square ring, are employed to achieve the wide beamwidth radiation. The antenna is designed to operate at around 12 GHz. It can achieve an impedance bandwidth (|S11|<−10 dB) of 10.8–13.4 GHz and a 3-dB AR bandwidth of 10.9–13.5 GHz. The antenna showed a right-hand circular polarization (RHCP) radiation with a wide half-power beamwidth (>100°), a wide 3-dB axial-ratio beamwidth (>90°) and a high radiation gain (>5dB) within the operational bandwidth.","PeriodicalId":210833,"journal":{"name":"2016 2nd IEEE International Conference on Computer and Communications (ICCC)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116652588","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 : 2016-10-01DOI: 10.1109/COMPCOMM.2016.7924832
Zhenxing Ding, Wei Wang, Y. Meng, Lingcao Wang
The carrier airwake is one of the most important factors in the aircraft carrier landing operation. Therefore, this paper presents an airwake reject method for aircraft landing control in the carrier airwake. The method utilizes direct force control (DFC) commands to mitigate the influence of carrier airwake, and employs learning control (LC) method to correct DFC command errors. In order to verify the performance of this method, a simulation experiment is conducted and experiment results show satisfactory control performance of the method.
{"title":"Airwake reject method for aircraft landing control in the carrier airwake","authors":"Zhenxing Ding, Wei Wang, Y. Meng, Lingcao Wang","doi":"10.1109/COMPCOMM.2016.7924832","DOIUrl":"https://doi.org/10.1109/COMPCOMM.2016.7924832","url":null,"abstract":"The carrier airwake is one of the most important factors in the aircraft carrier landing operation. Therefore, this paper presents an airwake reject method for aircraft landing control in the carrier airwake. The method utilizes direct force control (DFC) commands to mitigate the influence of carrier airwake, and employs learning control (LC) method to correct DFC command errors. In order to verify the performance of this method, a simulation experiment is conducted and experiment results show satisfactory control performance of the method.","PeriodicalId":210833,"journal":{"name":"2016 2nd IEEE International Conference on Computer and Communications (ICCC)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121722893","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 : 2016-10-01DOI: 10.1109/COMPCOMM.2016.7925117
Kaiyue Yan, Yan Yang, Yushu Zhang, Yuan Zhu
Due to the limitation of digital chains' number, the hybrid beamforming structure may be utilized for massive Multiple Input and Multiple Output (MIMO) systems, where the eNodeB may maintain a number of analog Tx beams. To achieve higher spectral efficiency, two analog beam interpolation methods are further proposed to enhance the accuracy of downlink analog beamforming, which based on amplitude or angle interpolation algorithm. In this paper, the typical channel state information(CSI) from user equipment (UE) is used to determine the candidate Transmitting (Tx) beams. Especially, by exploiting the spatial correlation of neighbor candidate beams, the best downlink analog Tx beam for each UE can be generated by interpolating the two strongest Tx beams from the Uplink Control Informat ion (UCI) report. Moreover, we develop a limited CSI feedback to alleviate the feedback load in traditional frequency division duplexing (FDD) Massive-MIMO systems, giving rise to better coverage and spectrum efficiency. Simulation results show that with the help of analog beam interpolation, the downlink spectrum efficiency can be significantly increased.
{"title":"Optimized hybrid beamforming method with limited feedback in Massive MIMO systems","authors":"Kaiyue Yan, Yan Yang, Yushu Zhang, Yuan Zhu","doi":"10.1109/COMPCOMM.2016.7925117","DOIUrl":"https://doi.org/10.1109/COMPCOMM.2016.7925117","url":null,"abstract":"Due to the limitation of digital chains' number, the hybrid beamforming structure may be utilized for massive Multiple Input and Multiple Output (MIMO) systems, where the eNodeB may maintain a number of analog Tx beams. To achieve higher spectral efficiency, two analog beam interpolation methods are further proposed to enhance the accuracy of downlink analog beamforming, which based on amplitude or angle interpolation algorithm. In this paper, the typical channel state information(CSI) from user equipment (UE) is used to determine the candidate Transmitting (Tx) beams. Especially, by exploiting the spatial correlation of neighbor candidate beams, the best downlink analog Tx beam for each UE can be generated by interpolating the two strongest Tx beams from the Uplink Control Informat ion (UCI) report. Moreover, we develop a limited CSI feedback to alleviate the feedback load in traditional frequency division duplexing (FDD) Massive-MIMO systems, giving rise to better coverage and spectrum efficiency. Simulation results show that with the help of analog beam interpolation, the downlink spectrum efficiency can be significantly increased.","PeriodicalId":210833,"journal":{"name":"2016 2nd IEEE International Conference on Computer and Communications (ICCC)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121723169","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 : 2016-10-01DOI: 10.1109/COMPCOMM.2016.7924839
Feng Lv, Zeyu Zhang, Kun Zhai, Xiyuan Ju
In view of the complex structure of large wind turbine system and the characteristics of the operation process variable, this paper puts forward a fault diagnosis method based on multivariate statistics. The mathematical model based on partial least squares (PLS) without the need of complex model. Through the original data PLS algorithm built the relationship between input and output variables and get the monitoring model. Computer simulation results show this method can effectively reduce the dimension of data and realize the fault diagnosis. Compared with PCA, PLS are more fully use the sample space information, improve the accuracy of fault diagnosis effectively.
{"title":"Research on fault diagnosis method of wind turbine based on partial least square method","authors":"Feng Lv, Zeyu Zhang, Kun Zhai, Xiyuan Ju","doi":"10.1109/COMPCOMM.2016.7924839","DOIUrl":"https://doi.org/10.1109/COMPCOMM.2016.7924839","url":null,"abstract":"In view of the complex structure of large wind turbine system and the characteristics of the operation process variable, this paper puts forward a fault diagnosis method based on multivariate statistics. The mathematical model based on partial least squares (PLS) without the need of complex model. Through the original data PLS algorithm built the relationship between input and output variables and get the monitoring model. Computer simulation results show this method can effectively reduce the dimension of data and realize the fault diagnosis. Compared with PCA, PLS are more fully use the sample space information, improve the accuracy of fault diagnosis effectively.","PeriodicalId":210833,"journal":{"name":"2016 2nd IEEE International Conference on Computer and Communications (ICCC)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124944333","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 : 2016-10-01DOI: 10.1109/CompComm.2016.7925199
Liu Youjiang
As available information on networked environment becomes more abundant, diversified, and dispersed, traditional fixed information service mode will be substituted by on-demand information search and convergence. Therefore, dynamic and precise express of user information requirement becomes an important impact factor of information service quality. Based on TIREM (task information requirement express model), a method is proposed on dynamic information requirement expression generation, along with a demo software developed to verify the feasibility of TIREM and the proposed method.
{"title":"Toward automatic information search and convergence: A method on dynamic information requirement expression generation","authors":"Liu Youjiang","doi":"10.1109/CompComm.2016.7925199","DOIUrl":"https://doi.org/10.1109/CompComm.2016.7925199","url":null,"abstract":"As available information on networked environment becomes more abundant, diversified, and dispersed, traditional fixed information service mode will be substituted by on-demand information search and convergence. Therefore, dynamic and precise express of user information requirement becomes an important impact factor of information service quality. Based on TIREM (task information requirement express model), a method is proposed on dynamic information requirement expression generation, along with a demo software developed to verify the feasibility of TIREM and the proposed method.","PeriodicalId":210833,"journal":{"name":"2016 2nd IEEE International Conference on Computer and Communications (ICCC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125017302","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 : 2016-10-01DOI: 10.1109/COMPCOMM.2016.7925215
Dan Huang, Ji-yang Yu, Guang-Yun Li
A two-dimensional temporal and spatial correlated lognormal clutter sequence generation method based on FPGA is proposed. This method solves the problem of long generation time generating the sequence based on the DSP, due to the higher sampling rates or long data, which is difficult to meet real-time requirements of the data generated‥ In this paper, based on FPGA, using a one-dimensional temporal correlated Lognormal clutter sequence and one-dimensional Gaussian random sequence, using a single precision floating-point matrix multiplier and adders and multipliers of FPGA IP core, methods are proposed to generate two-dimensional temporal spatial correlated lognormal clutter sequence. One single precision floating-point matrix multiplier includes an input data buffer and output data buffer, a single-precision floating-point adder, a single-precision floating-point multiplier and data access control module. Two-dimensional temporal and spatial correlated lognormal clutter generated each step employs parallel processing method, the method avoids the problems of existing methods that instruction cycles execute serially and meet the requirements of real-time data generation.
{"title":"Two-dimensional temporal and spatial correlated Lognormal clutter sequence generated based on FPGA","authors":"Dan Huang, Ji-yang Yu, Guang-Yun Li","doi":"10.1109/COMPCOMM.2016.7925215","DOIUrl":"https://doi.org/10.1109/COMPCOMM.2016.7925215","url":null,"abstract":"A two-dimensional temporal and spatial correlated lognormal clutter sequence generation method based on FPGA is proposed. This method solves the problem of long generation time generating the sequence based on the DSP, due to the higher sampling rates or long data, which is difficult to meet real-time requirements of the data generated‥ In this paper, based on FPGA, using a one-dimensional temporal correlated Lognormal clutter sequence and one-dimensional Gaussian random sequence, using a single precision floating-point matrix multiplier and adders and multipliers of FPGA IP core, methods are proposed to generate two-dimensional temporal spatial correlated lognormal clutter sequence. One single precision floating-point matrix multiplier includes an input data buffer and output data buffer, a single-precision floating-point adder, a single-precision floating-point multiplier and data access control module. Two-dimensional temporal and spatial correlated lognormal clutter generated each step employs parallel processing method, the method avoids the problems of existing methods that instruction cycles execute serially and meet the requirements of real-time data generation.","PeriodicalId":210833,"journal":{"name":"2016 2nd IEEE International Conference on Computer and Communications (ICCC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114285336","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 parallel packing robot has the advantages of high rigidity, strong carrying capacity and high precision, and Delta robot is a type of parallel robot. The TCM (traditional Chinese medicine) packing robot system is designed based on the Delta structure, which can be used in the packing of TCM products such as protein powder. The classic “door” shape trajectory planning is conducted in accordance with the packing product, a 3D model is built for the product, and related kinematics simulation and analysis is also conducted. Through kinematics simulation in ADAMS, we obtain its movement trajectory, and the obtained result is consistent with that of theoretical calculation.
{"title":"Modeling of TCM packing robot and its kinematics simulation and optimization","authors":"Yong Tao, Youdong Chen, Hui Liu, Jinpeng Gao, Hegen Xiong, Guang Xie","doi":"10.1109/COMPCOMM.2016.7924835","DOIUrl":"https://doi.org/10.1109/COMPCOMM.2016.7924835","url":null,"abstract":"The parallel packing robot has the advantages of high rigidity, strong carrying capacity and high precision, and Delta robot is a type of parallel robot. The TCM (traditional Chinese medicine) packing robot system is designed based on the Delta structure, which can be used in the packing of TCM products such as protein powder. The classic “door” shape trajectory planning is conducted in accordance with the packing product, a 3D model is built for the product, and related kinematics simulation and analysis is also conducted. Through kinematics simulation in ADAMS, we obtain its movement trajectory, and the obtained result is consistent with that of theoretical calculation.","PeriodicalId":210833,"journal":{"name":"2016 2nd IEEE International Conference on Computer and Communications (ICCC)","volume":"52 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113975603","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 : 2016-10-01DOI: 10.1109/COMPCOMM.2016.7924716
Jian Wang, Shang Ma, Zeguo Yang, Jianhao Hu
In Residue Number System-based systems, how to select moduli set and evaluate its performance is an important issue. The objective of this study is to propose a systemic performance evaluation method for RNS based on the properties of moduli set. By abstracting the inherent properties of moduli sets, such as the complexity of arithmetic units, utilization ratio of dynamic range, parallelism and balance between residue channels, this method can provide advices on moduli set selection and carry out performance estimation before circuits implementation. Furthermore, we also propose a new multi-channel moduli set by introducing a new radix component in this paper. Performance analysis and comparison results show that the proposed multi-channel moduli set has better performance of dynamic range utilization ratio, parallelism and balance than that of the commonly used moduli set with the same number of channels.
{"title":"A systemic performance evaluation method for Residue Number System","authors":"Jian Wang, Shang Ma, Zeguo Yang, Jianhao Hu","doi":"10.1109/COMPCOMM.2016.7924716","DOIUrl":"https://doi.org/10.1109/COMPCOMM.2016.7924716","url":null,"abstract":"In Residue Number System-based systems, how to select moduli set and evaluate its performance is an important issue. The objective of this study is to propose a systemic performance evaluation method for RNS based on the properties of moduli set. By abstracting the inherent properties of moduli sets, such as the complexity of arithmetic units, utilization ratio of dynamic range, parallelism and balance between residue channels, this method can provide advices on moduli set selection and carry out performance estimation before circuits implementation. Furthermore, we also propose a new multi-channel moduli set by introducing a new radix component in this paper. Performance analysis and comparison results show that the proposed multi-channel moduli set has better performance of dynamic range utilization ratio, parallelism and balance than that of the commonly used moduli set with the same number of channels.","PeriodicalId":210833,"journal":{"name":"2016 2nd IEEE International Conference on Computer and Communications (ICCC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114007095","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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