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IEEE International Conference on Big Data

作者： Zhi Feng Haoyi Xiong Chuanyuan Song Sijia Yang Baoxin Zhao Licheng Wang Zeyu Chen Shengwen Yang Liping Liu Jun Huan Big Data Group (BDG) Big Data Lab (BDL) and PaddlePaddle (DLTP) Baidu Inc. Beijing China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China

ISBN: (数字)9781728108582

ISBN: (纸本)9781728108599

Federated machine learning systems have been widely used to facilitate the joint data analytics across the distributed datasets owned by the different parties that do not trust each others. In this paper, we proposed a novel Gradient Boosting Machines (GBM) framework SecureGBM built-up with a multi-party computation model based on semi-homomorphic encryption, where every involved party can jointly obtain a shared Gradient Boosting machines model while protecting their own data from the potential privacy leakage and inferential identification. More specific, our work focused on a specific “dualparty” secure learning scenario based on two parties - both party own an unique view (i.e., attributes or features) to the sample group of samples while only one party owns the labels. In such scenario, feature and label data are not allowed to share with *** achieve the above goal, we firstly extent - LightGBM - a well known implementation of tree-based GBM through covering its key operations for training and inference with SEAL homomorphic encryption schemes. However, the performance of such re-implementation is significantly bottle-necked by the explosive inflation of the communication payloads, based on ciphertexts subject to the increasing length of plaintexts. In this way, we then proposed to use stochastic approximation techniques to reduced the communication payloads while accelerating the overall training procedure in a statistical manner. Our experiments using the real-world data showed that SecureGBM can well secure the communication and computation of LightGBM training and inference procedures for the both parties while only losing less than 3% AUC, using the same number of iterations for gradient boosting, on a wide range of benchmark datasets. More specific, compared to LightGBM, the proposed SecureGBM would slowdown with 3×~64× time consumption per iteration in the training procedure, while SecureGBM becomes more and more efficient when the scale of the tra

关键词： Boosting Encryption Computational modeling Training Data models Classification algorithms

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A Game Theoretic Approach for Hierarchical Caching Resource Sharing in 5G Cellular Networks with Virtualization

A Game Theoretic Approach for Hierarchical Caching Resource ...

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2018中国信息通信大会(CICC2018)

作者： Renchao Xie Rui Wang F.Richard Yu Tao Huang Yunjie Liu State Key Lab.of Networking and Switching Technology Beijing University of Posts and Telecom. Depart.of Systems and Computer Eng. Carleton University

In the forthcoming fifth generation（5G）cellular networks,caching and virtualization have been considered as promising *** virtualization of 5G cellular networks,the caching resources deployed by infrastructure providers（InPs）can be abstracted into isolated slices and transparently shared by mobile virtual network operators（MVNOs）.In this case,how the MVNOs to share the caching resource in virtualization of 5G cellular networks is one of the most *** this paper,different from previous works,we consider a hierarchical caching architecture that core network and radio access network（RAN）have the caching capability in 5G networks with ***,the problem of hierarchical caching resource sharing for MVNOs is studied,which is formulated as a competitive game to maximize their expectation revenue based on the oligopoly market *** it is a hard problem to find the optimal solution in the hierarchical caching resource sharing problem,we decompose the optimization problem into two independent caching resource sharing problems in RAN and core network,*** the local optimal solutions are solved and the global Nash equilibrium solution is ***,simulation results are illustrated to demonstrate the performance of the proposed scheme.

关键词： Hierarchical Caching Resource Sharing Game Theory Oligopoly Market Model 5G Networks

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Energy-Efficient Joint Caching and Transcoding for HTTP Adaptive Streaming in 5G Networks With Mobile Edge Computing

Energy-Efficient Joint Caching and Transcoding for HTTP Adap...

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2018中国信息通信大会(CICC2018)

作者： Renchao Xie Zishu Li Qingmin Jia F.Richard Yu Tao Huang State Key Lab.of Networking and Switching Technology Beijing University of Posts and Telecom. Depart.of Systems and Computer Eng. Carleton University

With the HTTP adaptive video streaming transmis-sion over mobile networks being widely considered and the new promising technique of mobile edge computing（MEC）emerging,the problem of HTTP adaptive video streaming transmission in MEC-based 5G networks by utilizing the edge computing and cloud computing capabilities has been widely ***,most of the existing works focus on the issues of network resource utilization or the quality of experience（QoE）promot,while the energy efficiency is largely *** this paper,different from previous works,by taking the caching and transcoding into consideration,we propose a joint caching and transcoding sched-ule strategy for HTTP adaptive video streaming transmission in MEC-enhanced 5G networks to realize the energy *** formulate the problem of energy-efficient joint caching and transcoding as an integer programming problem to minimize the system energy *** the optimization problem is NP-hard,which brings huge computation ***,to make the optimization problem tractable,we introduce a heuristic algorithm based on a simulated annealing algorithm to iteratively approximate the global optimum solution with a lower complexity and higher ***,simulation results are shown to illustrate to show that our proposed scheme presents an excellent performance.

关键词： Mobile Edge Computing HTTP Adaptive Streaming Caching Transcoding Energy Efficiency

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Application of big data technology in evaluation of operating state of high-pressure hydrogenation heat exchanger 4

Application of big data technology in evaluation of operatin...

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4th IEEE International Conference on Computer and Communications, ICCC 2018

作者： Li, Lujie Liu, Xu Du, Rui Xu, Peng Science and Technology on Communication Networks Laboratory Shijiazhuang China International School Beijing University of Posts and Telecommunications Beijing China State Key Lab of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9781538683392

The high-pressure hydrogenation heat exchanger is an important device of the refinery, but the high-pressure hydrogenation heat exchanger is exposed to the problem of leakage caused by ammonium salt corrosion. Therefore, it is very important to evaluate the operating status of the hydrogenation heat exchanger. To improve the method of using the traditional method to evaluate the operating status of hydrogenation heat exchangers, this paper proposes a method for evaluating the operating status of hydrogenation heat exchangers based on big data. For noisy data common in the industry, this paper proposes an automated noisy interval detection algorithm. For the problem that the sensor parameters have high dimensions and there are unrelated dimensions, this paper proposes a key parameter detection algorithm based on Pearson correlation coefficient. Finally, this paper presents a system-based health scoring algorithm based on PCA (Principal Component Analysis) to assist site operators in assessing the health of hydrogenation heat exchangers. The evaluation of the operating status of the hydrorefining heat exchange device based on big data technology will help the technicist to more accurately grasp the status of the industrial system and have positive guiding significance for the early warning of the failure. © 2018 IEEE.

关键词： Heat exchangers

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A Novel Text Classification Approach Based on Word2vec and TextRank keyword Extraction

A Novel Text Classification Approach Based on Word2vec and T...

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IEEE International Conference on Data Science in Cyberspace (DSC)

作者： Shouyou Song Zhongru Wang Shuai Xu Shice Ni Jia Xiao Zhejiang Lab Hangzhou China Institude of Systems Engineering Academy of Military Sciences Beijing China Investigation Technology Center PLCMC Beijing China State key Laboratory Of Networking And Switching Beijing University of Posts and Telecommunications Beijing China

In the era of big data, a practical challenge is how to extract the keywords and classify the content of the massive text data efficiently. To address this challenge, through extensive research of existing approaches, we propose a novel text classification approach based on TextRank and Word2vec. In our approach, we integrate the external influence of the Word2vec training model and the location-aware weighting influence of the keywords into the Textrank module. Furthermore, we propose a novel text re-classification algorithm based on the combination of the keywords and KNN. The experiment results show that our approach achieves better accuracy and performance compared to TF-IDF and TextRank algorithm.

关键词： Training Data mining Feature extraction Context modeling Predictive models Semantics Bayes methods

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Event-triggered online proactive network association to mobile edge computing for IoT

arXiv

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arXiv 2019年

作者： Zhang, Jian Cui, Qimei Zhang, Xuefei Chen, Kwang-Cheng Zhang, Ping National Engineering Lab for Mobile Network Technologies State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing100876 China Department of Electrical Engineering University of South Florida TampaFL33620 United States

Ultra-low latency communication for mobile machines emerges as a critical technology in Internet of Things (IoT). Proactive network association has been suggested to support ultra-low latency communication with the assistance of mobile edge computing. To resolve system dynamics and uncertainty, in this paper, an online proactive network association is proposed to minimize average task delay while considering time-average energy consumption constraints. Under distributed computing and networking environments, we formulate an event-triggered proactive network association model by semi-Markov task states and independent identically distributed (i.i.d.) random events. Then we facilitate the mobility-aware anticipatory network association to predictively consider handover effects caused by the mobility. Based on the Markov decision processes (MDP) and Lyapunov optimization, the two-stage online proactive network association (TOPNA) decision algorithm is proposed without the knowledge nor distribution of random events. Simulation results exhibit the effectiveness of the proposed algorithm. Copyright © 2019, The Authors. All rights reserved.

关键词： Markov processes

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Dynamic range impact on 3D MIMO channel characteristics in rural-macro scenario at 3.5 GHz 12

Dynamic range impact on 3D MIMO channel characteristics in r...

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12th European Conference on Antennas and Propagation, EuCAP 2018

作者： Zhang, Weite Tian, Lei Wu, Zhongyuan Zhang, Jianhua Zheng, Yi Cao, Jingmin Key Lab of Universal Wireless Communications Ministry of Education China State Key Lab of Networking and Switching Technology Beijing University of Posts and Telecommunications Mailbox NO.92 Beijing100876 China China Mobile Research Institude Beijing China National Key Laboratory of Science and Technology on Blind Signal Processing Chengdu Sichuan China

ISBN: (纸本)9781785617911

Rural-macro (RMa) is an important scenario for fifth generation (5G) deployment, and there is a strong diffraction in RMa making it difficult to distinguish between line-of-sight (LoS) and non-line-of-sight (NLoS) case. Since the environmental condition is closely related to the dynamic range of channel impulse response (CIR), this paper studies the dynamic range impact on characteristics of three dimensional (3D) multiple-input multiple-output (MIMO) channels based on 3.5 GHz measurement campaign in RMa. The space-alternating generalized expectation-maximization (SAGE) algorithm is employed to estimate multipath component parameters. The channel statistical characteristics, channel capacity and eigenvalues of CIR matrix are calculated for different CIR dynamic ranges. The results show that the delay spread, the angle spread, the channel capacity and the sub-channel correlation are linearly related to the dynamic range of CIR. Thus, the results give a new perspective to study channel characteristics based on CIR dynamic range in RMa scenario. © 2018 Institution of Engineering and *** Rights Reserved.

关键词： Channel capacity

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Comparison on channel characteristics at 3.5 GHz and 28 GHz 12

Comparison on channel characteristics at 3.5 GHz and 28 GHz

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12th European Conference on Antennas and Propagation, EuCAP 2018

作者： Wu, Zhongyuan Zhang, Jianhua Tian, Lei Hu, Zhixue Jiang, Tao Li, Wei Key Lab of Universal Wireless Communications Ministry of Education China State Key Lab of Networking and Switching Technology Beijing University of Posts and Telecommunications Mailbox NO.92 Beijing100876 China Department of Electrical Engineering Northern Illinois University DeKalbIL60115 United States

ISBN: (纸本)9781785617911

In this paper, the channel measurements at 28 GHz and 3.5 GHz were conducted in the same indoor shopping mall scenario for the purpose of comparing the channel propagation characteristics between millimeter wave and centimeter wave. In the measurement of 28 GHz, a high gain steerable horn antenna is rotated with the step of 5 degrees in azimuth to synthesize the omnidirectional array for collecting the angular information at receiver (Rx) while a sector antenna at transmitter (Tx). And the data at 3.5 GHz is collected by a MIMO measurement equipment of an omnidirectional array (ODA) at Rx with an uniform array (UPA) at Tx. Based on the data and channel estimation algorithm space-alternating generalized expectation-maximization (SAGE), Power Angular Spectrum (PAS) and Root Mean Square (RMS) Angular Spread of Azimuth of arrive (ASA) are calculated. After that, the PAS at each measured spot are compared and analyzed. Meanwhile, the relationship between RMS ASA and distance in the Line of sight (LoS) are observed at 3.5 GHz and 28 GHz. Finally, the fitted distributions and parameters of the RMS ASA at 3.5 GHz and 28 GHz are compared with the Model-A proposed in ITU IMT-2020 channel model, which the results in NLoS are both closer to the standard parameters than LoS at 3.5 GHz and 28 Ghz. © Institution of Engineering and *** Rights Reserved.

关键词： Horn antennas

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Codebook-Based Beam Tracking for Conformal Array-Enabled UAV MmWave Networks

arXiv

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arXiv 2020年

作者： Zhang, Jinglin Xu, Wenjun Gao, Hui Pan, Miao Han, Zhu Zhang, Ping Key Lab of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications Beijing100876 China Key Laboratory of Trustworthy Distributed Computing and Service Ministry of Education Beijing University of Posts and Telecommunications Beijing100876 China Department of Electrical and Computer Engineering University of Houston HoustonTX77204 United States University of Houston HoustonTX77004 United States Department of Computer Science and Engineering Kyung Hee University Seoul446-701 Korea Republic of State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing100876 China

Millimeter wave (mmWave) communications can potentially meet the high data-rate requirements of unmanned aerial vehicle (UAV) networks. However, as the prerequisite of mmWave communications, the narrow directional beam tracking is very challenging because of the three-dimensional (3D) mobility and attitude variation of UAVs. Aiming to address the beam tracking difficulties, we propose to integrate the conformal array (CA) with the surface of each UAV, which enables the full spatial coverage and the agile beam tracking in highly dynamic UAV mmWave networks. More specifically, the key contributions of our work are three-fold. 1) A new mmWave beam tracking framework is established for the CA-enabled UAV mmWave network. 2) A specialized hierarchical codebook is constructed to drive the directional radiating element (DRE)-covered cylindrical conformal array (CCA), which contains both the angular beam pattern and the subarray pattern to fully utilize the potential of the CA. 3) A codebook-based multiuser beam tracking scheme is proposed, where the Gaussian process machine learning enabled UAV position/attitude predication is developed to improve the beam tracking efficiency in conjunction with the tracking-error aware adaptive beamwidth control. Simulation results validate the effectiveness of the proposed codebook-based beam tracking scheme in the CA-enabled UAV mmWave network, and demonstrate the advantages of CA over the conventional planner array in terms of spectrum efficiency and outage probability in the highly dynamic scenarios. Copyright © 2020, The Authors. All rights reserved.

关键词： Millimeter waves

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Construction and Practice of Cloud-based Experiment and Innovation Project Supporting Platform for Computer Science Education

Construction and Practice of Cloud-based Experiment and Inno...

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China-Europe International Symposium on Software Engineering Education(CEISEE 2018)(第十四届中欧软件工程教育国际研讨会)

作者： Peng Xu Hui Cai Jian Kuang Xiaoyan Zhang State Key Lab of Networking and 1Switching Technology Beijing University of Posts and Telecommunicat State Key Lab of Networking and Switching Technology Beijing University of Posts and Telecommunicati School of Software Beijing University of Posts and TelecommunicationsBeijing 100876China

Higher and more requirements on experiments and innovation projects of computer science courses is brought forward to promote the"Double First Class".For these *** cloud-based experiment and innovation project supporting platform is introduced in this *** the one *** platform could satisfy the diversified resource requirements of both teachers and students in course experiments and innovation *** the other *** feature of”construct once and access anywhere“could achieve higher resource utilization rate and lower costs than the traditional“lab-based”experiment *** supporting platform has been applied to practice and gains a lot of positive feedbacks.

关键词： experiment innovation project cloud computing course computing science

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