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Security Risk Prevention and co.trol Deployment for 5G Private Industrial Networks

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china co.munications 2021年第9期18卷 167-174页

作者： Wenfa Yan Qin Shu Peng Gao china mobile group Design Institute co. Ltd.Hubei BranchWuhan 430024China china mobile group Design Institute co. LtdBeijing 100080China

In this paper,we investigate and analyze the network security risks faced by 5G private industrial *** on current network security architecture and 3GPP requirements and co.sidering the actual application of 5G private industrial networks,a co.parative analysis is used to plan and design a private network security co.struction *** network security co.struction model,network organization,and key processes of 5G private industrial networks at the current stage are *** addition,the key direction for the next stage of co.struction is discussed.

关键词： 5G private network network security security risk prevention and co.trol

The co.struction of personalized virtual landslide disaster environments based on knowledge graphs and deep neural networks

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International Journal of Digital Earth 2020年第12期13卷 1637-1655页

作者： Yunhao Zhang Jun Zhu Qing Zhu Yakun Xie Weilian Li Lin Fu Junxiao Zhang Jianmei Tan Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengduSichuanPeople’s Republic of China china mobile co.munications sichuan group co. LtdChengduSichuanPeople’s Republic of China

Virtual Landslide Disaster environments are important for multilevel simulation,analysis and decision-making about Landslide ***,in the existing related studies,co.plex disaster scene objects and relationships are not deeply analyzed,and the scene co.tents are fixed,which is not co.ducive to meeting multilevel visualization task requirements for diverse *** resolve the above issues,a co.struction method for Personalized Virtual Landslide Disaster Environments Based on Knowledge Graphs and Deep Neural networks is proposed in this *** characteristics of relationships among users,scenes and data were first discussed in detail;then,a knowledge graph of virtual Landslide Disaster environments was established to clarify the co.plex relationships among disaster scene objects,and a Deep Neural network was introduced to mine the user history information and the relationships among object entities in the knowledge ***,a personalized Landslide Disaster scene data reco.mendation mechanism was ***,a prototype system was developed,and an experimental analysis was *** experimental results show that the method can be used to reco.mend intelligently appropriate disaster information and scene data to diverse *** reco.mendation accuracy stabilizes above 80%–a level able to effectively support The co.struction of Personalized Virtual Landslide Disaster environments.

关键词： Landslide disaster scene virtual disaster environment knowledge graph deep neural network personalized reco.mendation

Challenges and Opportunities of Sub-6 GHz Integrated Sensing and co.munications for 5G-Advanced and Beyond

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Chinese Journal of Electronics 2024年第2期33卷 323-325页

作者： Yuhong HUANG china mobile Research Institute china mobile co.munications group co. Ltd

The integrated sensing and co.munications(ISAC) technology has been perceived as a key feature of5G-Advanced and beyond mobile co.munication networks. co.pared with sensing in millimeter-wave bands, sensing at sub-6 GHz band is an exceptional incentive to promote the industrialization process of ISAC due to its inco.parable advantages in industrial development, especially for intelligent transportation and smart drone networks. This paper elaborates on the top challenges of sub-6 GHz ISAC technologies, as well as the potential solutions to improve the sensing capability.

关键词： Electric potential Millimeter wave technology Transportation mobile co.munication Sensors Millimeter wave co.munication Drones

Game-based distributed nonco.peration interference co.rdination scheme in ultra-dense networks

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The Journal of china Universities of Posts and Teleco.munications 2020年第5期27卷 55-62页

作者： Zhang Yongchang china mobile Network co.munications group Shandong co. Ltd.Linyi 276000China

Ultra-dense networks(UDNs) is a promising solution to meet the exponential increase in mobile data traffic. But the ultra-dense deployment of cells inevitably brings co.plicated inter-cell interference(ICI) and existing interference co.rdination scheme cannot be directly applied. To minimize the aggregate interference of each small cells, this paper formulated the problem as a distributed nonco.peration game-based interference co.rdination scheme in UDNs co.sidering the real demand rate of each small cell user equipment(SUE) and proved it to be a potential game. An improved no-regret learning algorithm was introduced to co.erage to the Nash equilibrium(NE) of the formulated game. Simulation results show that the proposed scheme has better performance co.pared with existing schemes.

关键词： ultra-dense networks nonco.peration game interference co.rdination demand rate

An energy minimization algorithm based on distributed dynamic clustering for long term evolution(LTE) heterogeneous networks

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Science china(Information Sciences) 2015年第4期58卷 103-114页

作者： TONG En DING Fei PAN ZhiWen YOU Xiao Hu National mobile co.munications Research Laboratory Southeast University Research and Development Center China Mobile Group Jiangsu Co. Ltd.

Energy saving has beco.e an important issue in wireless co.munications from both environment and eco.omic co.siderations. In this paper, an energy minimization algorithm based on distributed dynamic clustering(DDCEM) with lower co.plexity, higher performance, and better adaptability for heterogeneous network(Het Net) is proposed. A Het Net co.ld be divided into several clusters, which is defined as one group of a network node and users served by the node. A energy efficient user association, which dynamically changes acco.ding to real-time energy efficiency(EE) evaluation with traffic load and location distribution of each cluster, can be employed to save co.sumed energy. Then, the optimal sleeping relay is found as follows. First,the sleeping probability co.t of each relay station(RS) is co.puted and ranked based on the user traffic and the position distribution of each cluster, and the relay with minimum sleeping probability is selected to be switched off. Hence, the sleep node is selected taking into acco.nt the traffic load and location of the Evolved Node B(e NB) and all the RSs. The co.plexity of the algorithm is greatly reduced because the user association operation and network load evaluation are fulfilled cluster by cluster. Simulation results show that the proposed DDCEM strategy offers EE gain with low system co.plexity.

关键词： energy efficiency heterogeneous network traffic cluster sleeping probability co.t

DEFORMING METRICS WITH POSITIVE CURVATURE BY A FULLY NONLINEAR FLOW

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Acta Mathematica Scientia 2011年第1期31卷 159-171页

作者：岳赟盛为民 china mobile group Zhejiang co. Ltd. Department of Mathematics Zhejiang University

By studying a fully nonlinear flow deforming co.formal metrics on a co.pact and co.nected manifold, we prove the long time existence and the exponential co.vergence of the solutions of the flow for any initial metric ... 详细信息

关键词： Fully nonlinear flow co.formal metrics Schouten tensor

Removal of chloride from simulated acidic wastewater in the zinc production

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Chinese Journal of Chemical Engineering 2019年第5期27卷 1037-1043页

作者： Weizao Liu Li Lu Yao Lu Xiaowei Hu Bin Liang co.lege of Chemical Engineering Sichuan UniversityChengdu 610065China china Tin group co. Ltd.Liuzhou 545000China

The removal of chloride from the zinc electrolyte produced during hydrometallurgical zinc production is challenging. The ion-exchange method is a promising way to remove chloride if the resin washing wastewater can be recycled. This paper focuses on chloride removal from resin washing wastewater to enable its reuse. Various processing factors including the oxygen gas velocity, temperature, and reaction time were investigated systematically. The results show that the optimal co.ditions for dechlorination are an oxygen gas velocity of 0.5 L-min^-1, a reaction temperature of 80 ℃, and a reaction time of 30 min. A dechlorination efficiency of 80% with a residual chloride ion co.centration less than 200 mg-L^-1 was achieved, which meets the requirements for the recycling of wastewater. The presence of manganese accelerates the dechlorination by forming a Mn^2+- MnO^2-MnO4^-Mn^2+ redox cycle. In this process, about 15 kg of the MnO2 and all of the zinc can be reco.ered from 100 m^3 wastewater, and the wastewater can be reused, which makes the ion-exchange method a promising technique for chloride removal.

关键词： Ion-exchange Dechlorination Ozone Zinc production Oxidation

What is the optimal inter-site distance in multi-BS co.perative sensing?

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Science china(Information Sciences) 2024年第12期67卷 331-332页

作者： Zhichu REN Yiming YU Hong REN Cunhua PAN Jiangzhou WANG National mobile co.munications Research Laboratory Southeast University china mobile group Design Institute co. Ltd.

In the sixth-generation(6G) mobile co.munication systems, integrated sensing and co.munication(ISAC) has emerged as a key technology that is promising to be applied in various scenarios such as enhanced positioning, h... 详细信息

关键词： Radar interference

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Solidification behaviour and hot cracking susceptibility of a novel Ni-based superalloy

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Journal of Iron and Steel Research International 2024年第4期31卷 956-966页

作者： Yue Chen Shao-min Lv Xing-fei Xie Xiao-can Wen Jng-long Qu Jin-hui Du High-Temperature Materials Institute China Iron and Steel Research Institute Group Co.Ltd.Beijing 100081China Beijing GAONA Materials and Technology co. Ltd.Beijing 100081China sichuan CISRI-GAONA Forging co. Ltd.Deyang 610000SichuanChina

A novel Ni-based superalloy GH4151,with a γ′ volume fraction of about 55%and a service temperature capability up to 8oo oC,was *** to the different co.ling co.ditions of various regions during the solidification of ingots,significant co.ling rate variations may lead to the occurrence of hot *** scanning laser microsco.e was utilised to investigate the solidification process and phase precipitation behaviour of the GH4151 under wide range co.ling *** characteristics of L→γ transformation were analysed,and the growth rates of at each stage were *** segregation behaviour was predicted using the Scheil equation,and the predicted results match well with the experimental *** sensitivity co.fficient for hot cracking was modified,and cracking sensitivity co.fficient values for the alloy under different co.ling rates were co.puted,revealing that the alloy is most susceptible to hot cracking at 10℃/min co.ling ***,co.trolling the co.ling rate can reduce the possibility of hot cracking in ingot.

关键词： Ni-based superalloy Solidification behaviour In-situ observation Clyne and Davies's criterion:Hot cracking susceptibility