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A suboptimal joint bandwidth and power allocation for cooperative relay networks:a cooperative game theoretic approach

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Science China(Information Sciences) 2013年第7期56卷 64-75页

作者： ZHANG GuoPeng DING EnJie YANG Kun LIU Peng CUMT-iot perception mine research center China University of Mining and Technology School of Computer Science and Electronic Engineering University of Essex Wivenhoe Park

In commercial networks, user nodes operating on batteries are assumed to be selfish to consume their resources (i.e., bandwidth and power) solely maximizing their own benefits (e.g., the received signal-to-noise ratios (SNRs) and datarates). In this paper, a cooperative game theoretical framework is proposed to jointly perform the bandwidth and power allocation for selfish cooperative relay networks. To ensure a fair and efficient resource sharing between two selfish user nodes, we assume that either node can act as a source as well as a potential relay for each other and either node is willing to seek cooperative relaying only if the datarate achieved through cooperation is not lower than that achieved through noncooperation (i.e., direct transmission) by consuming the same amount of bandwidth and power resource. Define the cooperative strategy of a node as the number of bandwidth and power that it is willing to contribute for relaying purpose. The two node joint bandwidth and power allocation (JBPA) problem can then be formulated as a cooperative game. Since the Nash bargaining solution (NBS) to the JBPA game (JBPAG) is computationally difficult to obtain, we divide it into two subgames, i.e., the bandwidth allocation game (BAG) and the power allocation game (PAG). We prove that both the subgames have unique NBS. And then the suboptimal NBS to the JBPAG can be achieved by solving the BAG and PAG sequentially. Simulation results show that the proposed cooperative game scheme is efficient in that the performance loss of the NBS result to that of the maximal overall data-rate scheme is small while the maximal-rate scheme is unfair. The simulation results also show that the NBS result is fair in that both nodes could experience better performance than they work independently and the degree of cooperation of a node only depends on how much contribution its partner can make to improve its own performance.

关键词： cooperative relay resource allocation cooperative game theory Nash bargaining solution Pareto optimal

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High-resolution remote sensing image-based extensive deformation-induced landslide displacement field monitoring method

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International Journal of Coal Science & Technology 2015年第3期2卷 170-177页

作者： Shanjun Liu Han Wang Jianwei Huang Lixin Wu College of Resources and Civil Engineering NortheasternUniversity Shenyang 110819 China iot perception mine research center China University ofMining and Technology Xuzhou 220116 China

Landslide is one of the multitudinous serious geological hazards. The key to its control and reduction lies on dynamic monitoring and early warning. The article points out the insufficiency of traditional measuring means applied for large-scale landslide monitoring and proposes the method for extensive landslide displacement field monitoring using high- resolution remote images. Matching of cognominal points is realized by using the invariant features of SIFT algorithm in image translation, rotation, zooming, and affine transformation, and through recognition and comparison of characteristics of high-resolution images in different landsliding periods. Following that, landslide displacement vector field can be made known by measuring the distances and directions between cognominal points. As evidenced by field application of the method for landslide monitoring at West Open mine in Fushun city of China, the method has the attraction of being able to make areal measurement through satellite observation and capable of obtaining at the same time the information of large- area intensive displacement field, for facilitating automatic delimitation of extent of landslide displacement vector field and sliding mass. This can serve as a basis for making analysis of laws governing occurrence of landslide and adoption of countermeasures.

关键词： Landslide monitoring High-resolution remote sensing SIFT algorithm Deformation field

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Energy-efficient power allocation for selfish cooperative communication networks using bargaining game

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Science China(Information Sciences) 2012年第4期55卷 795-804页

作者： DING EnJie 1,ZHANG GuoPeng 1,LIU Peng 1 & YANG Kun 2 1 CUMT-iot perception mine research center,China University of Mining and Technology,Xuzhou 221116,China 2 School of Computer Science and Electronic Engineering,University of Essex Wivenhoe Park,Colchester Essex,CO4 3SQ,UK 1. CUMT-iot perception mine research center China University of Mining and Technology Xuzhou 221116 China2. School of Computer Science and Electronic Engineering University of Essex Wivenhoe Park Colchester Essex CO4 3SQ UK

In commercial networks,user nodes operating on batteries are assumed to be selfish to consume their energy solely to maximize their own benefits,e.g.,data *** this paper,we propose a bargaining game to perform the power allocation for the selfish cooperative communication *** our system,two partner nodes can act as a source as well as a relay for each other,and each node is with an energy constraint to transmit one *** a selfish node is willing to seek cooperative transmission only if the data rate achieved through cooperation will not lower than that achieved through noncooperation by using the same amount of *** energy-efficient power allocation problem can be modeled as a cooperative *** proved that there exists a unique Nash bargaining solution (NBS) for the game by verifying that the game is indeed a bargaining ***,the two objectives,i.e.,system efficiency and user fairness specified in the selfish networks can be *** results show that the NBS scheme is efficient in that the performance loss of the NBS scheme to that of the maximal overall rate scheme is small while the maximal-rate scheme is *** simulation results also show that the NBS result is fair in that both nodes could experience better performance than they work independently and the degree of cooperation of a node only depends on how much contribution its partner can make to improve its own performance.

关键词： cooperative communication energy efficiency resource allocation cooperative game theory Nash bargaining solution

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Integrated Chinese Segmentation, Parsing and Named Entity Recognition

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Chinese Journal of Electronics 2018年第4期27卷 756-760页

作者： LI Dongchen ZHANG Xiantao WU Xihong Key Laboratory of Machine perception and Intelligence Speech and Hearing research center Peking University

Segmentation, named entity recognition and parsing are standalone techniques in natural language processing community, and their annotations are inconsistent. However, the joint output is needed in some practical use, and they rely on the result of each other to make more concise output. A unified model is learned to resolve these three tasks simultaneously. At the training stage, the joint annotation of the three tasks are employed to learn a unified model. At the decoding stage, the three tasks are carried out on a given text to provide a consistent *** results demonstrate the higher performance for each task and verify the benefits of the unified framework.

关键词： Parsing Joint representation Named entity recognition

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Reference direction based immune clone algorithm for many-objective optimization

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Frontiers of Computer Science 2014年第4期8卷 642-655页

作者： Ruochen LIU Chenlin MA Fei HE Wenping MA Licheng JIAO Key Laboratory of Intelligent perception and Image Understanding of Ministry of Education International Research Center for Intelligent Perception and Computation Xidian University Xi'an 710071 China

In this paper, a new preference multi-objective optimization algorithm called immune clone algorithm based on reference direction method （RD-ICA） is proposed for solving many-objective optimization problems. First, an intelligent recombination operator, which performs well on the functions comprising many parameters, is introduced into an immune clone algorithm so as to explore the potentially excellent gene segments of all individuals in the antibody pop- ulation. Second, a reference direction method, a very strict ranking based on the desire of decision makers （DMs）, is used to guide selection and clone of the active population. Then a light beam search （LBS） is borrowed to pick out a small set of individuals filling the external population. The proposed method has been extensively compared with other recently proposed evolutionary multi-objective optimization （EMO） approaches over DTLZ problems with from 4 to 100 objectives. Experimental results indicate RD-ICA can achieve competitive results.

关键词： many-objective optimization preference multiobjective optimization artificial immune system reference direction method light beam search intelligent recombination operator

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An Efficient Scheduling Scheme for Fronthaul Load Reduction in Fog Radio Access Networks

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China Communications 2019年第11期16卷 146-153页

作者： Sovit Bhandari Hong Ping Zhao Hoon Kim iot and Big-data research center Department of Electronics Engineering Incheon National University

Fog radio access network(F-RAN) is one of the key technology that brings cloud computing benefit to the future of wireless communications for handling massive access and high volume of data traffic. The high fronthaul burden of a typical cellular system can be partially diminished by utilizing the storage and signal processing capabilities of the F-RANs, which is still not desirable as user throughput requirement is in the increasing trend with the increment of the internet of things(iot) devices. This paper proposes an efficient scheduling scheme that minimizes the fronthaul load of F-RAN system optimally to improve user experience, and minimize latency. The scheduling scheme is modeled in a way that the scheduler which provides the lower fronthaul load while fulfilling the minimum user throughput requirement is selected for the data transmission process. Simulation results in terms of user selection fairness, outage probability, and fronthaul load for a different portion of user equipments(UEs) contents in fog access point(F-AP) are shown and compared with the most common scheduling scheme such as round robin(RR) scheme to validate the proposed method.

关键词： fog radio access networks fog access points fronthaul load user throughput

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Environmental risk assessment of industrial byproduct gypsum utilized for flling abandoned mines

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International Journal of Coal Science & Technology 2022年第4期9卷 214-225页

作者： XueHong Du Xiangdong Li Qiyan Feng Lei Meng Yue Sun School of Environment Science and Spatial Informatics China University of Mining and TechnologyXuzhou 221116China The National and Local Joint Engineering Laboratory of Internet Application Technology On mine China University of Mining and TechnologyXuzhou 221008Jiangsu ProvinceChina iot perception mine research center China University of Mining and TechnologyXuzhou 221008Jiangsu ProvinceChina Jiangsu Vocational Institute of Architectural Technology No.26 Xueyuan RoadXuzhou 221433China

In response to the basic policy of green and low-carbon circular development to solve resource,environmental and ecological problems,gypsum is considered to be a flling material for mine *** explore the potential risks of gypsum to the groundwater environment due to the backflling of abandoned mines,a sequential batch leaching experiment was carried out in this paper,which used three types of industrial waste gypsum,namely,phosphorus gypsum(PG),titanium gypsum(TG)and fue gas desulfurization gypsum(FGDG).COMSOL Multiphysics 5.4 software was used to simulate and solve the migration process of the leached metal elements in the mine foor when these three gypsum types were used as flling materials to observe the concentration distributions and difusion distances of the metal elements from these three gypsum types in the mine *** results show that(1)during repeated contact of the three types of industrial waste gypsum with the leaching medium,the pH levels changed,and the changes in pH afected the leaching patterns for the heavy metal elements in the gypsum.(2)Based on the concentrations of the metal elements that were leached from the three types of gypsum,it can be determined that these three types of gypsum are not classifed as hazardous solid wastes,but they cannot be ruled out with regard to their risk to the groundwater environment when they are used as mine flling materials.(3)When the three types of gypsum are used as flling materials,the concentration distributions of the metal elements and their migration distances all exhibit signifcant changes over *** concentration distributions,difusion rates and migration distances of the metal elements from the diferent gypsum types are afected by their initial concentrations in the *** maximum migration distances of Zn in the foor from the PG,FGDG and TG are 8.2,8.1 and 7.5 m,respectively.

关键词： Industrial solid waste gypsum Coal mine back-flling Leaching of metal elements Patterns of migration

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A memetic algorithm based on hyper-heuristics for examination timetabling problems

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International Journal of Intelligent Computing and Cybernetics 2015年第2期8卷 139-151页

作者： Yu Lei Maoguo Gong Licheng Jiao Yi Zuo Key Laboratory of Intelligent perception and Image Understanding of Ministry of Education International Research Center for Intelligent Perception and ComputationXidian UniversityXi’anChina

Purpose–The examination timetabling problem is an NP-hard problem.A large number of approaches for this problem are developed to find more appropriate search ***-heuristic is a kind of representative *** hyper-heuristic,the high-level search is executed to construct heuristic lists by traditional methods(such as Tabu search,variable neighborhoods and so on).The purpose of this paper is to apply the evolutionary strategy instead of traditional methods for high-level search to improve the capability of global ***/methodology/approach–This paper combines hyper-heuristic with evolutionary strategy to solve examination timetabling ***,four graph coloring heuristics are employed to construct heuristic *** the evolutionary algorithm framework,the iterative initialization is utilized to improve the number of feasible solutions in the population;meanwhile,the crossover and mutation operators are applied to find potential heuristic lists in the heuristic space(high-level search).At last,two local search methods are combined to optimize the feasible solutions in the solution space(low-level search).Findings–Experimental results demonstrate that the proposed approach obtains competitive results and outperforms the compared approaches on some benchmark ***/value–The contribution of this paper is the development of a framework which combines evolutionary algorithm and hyper-heuristic for examination timetabling problems.

关键词： Evolutionary computation Examination timetabling problem Hyper-heuristic Memetic algorithm

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Multi-parameter numerical simulation of dynamic monitoring of rock deformation in deep mining

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International Journal of Mining Science and Technology 2016年第5期26卷 851-855页

作者： Li Juanjuan Hu Mingshun Ding Enjie Kong Wei Pan Dongming Chen Shenen iot perception mine research center China University of Mining ＆ Technology Xuzhou 221008 China The National and Local Joint Engineering Laboratory of lnternet Application Technology on mine China University of Mining ＆ Technology Xuzhou 221008 China School of Resources and Geosciences China University of Mining ＆ Technology Xuzhou 221116 China City Exploring and Surveying Institute ofJinan Jinan 250013 China Department of Civil Engineering University of North Carolina at Charlotte Charlotte 28223 USA

The level of deformation development of surrounding rocks is a vital predictor to evaluate impending coal mine disasters and it is important to establish accurate measurements of the deformed status to ensure coal mine safety. Traditional deformation monitoring methods are mostly based on single parameter, in this paper, multiple approaches are integrated: firstly, both electric and elastic models are established,from which electric field distribution and seismic wave recording are calculated and finally, the resistivity profiles and source position information are determined using inversion methods, from which then the deformation and failure of mine floor are evaluated. According to the inversion results of both electric and seismic field signals, multiple-parameter dynamic monitoring of surrounding rock deformation in deep mine can be performed. The methodology is validated using numerical simulation results which shows that the multi-parameter dynamic monitoring methods have better results for surrounding rock deformation in deep mine monitoring than single parameter methods.

关键词： Dynamic monitoring Electric numerical simulation Elastic numerical simulation Inversion methods

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Design of a novel high holding voltage LVTSCR with embedded clamping diode

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Chinese Physics B 2020年第6期29卷 559-563页

作者： Ling Zhu Hai-Lian Liang Xiao-Feng Gu and Jie Xu Engineering research center of iot Technology Applications(Ministry of Education) Department of Electronic EngineeringJiangnan UniversityWuxi 214122China

In order to reduce the latch-up risk of the traditional low-voltage-triggered silicon controlled rectifier(LVTSCR), a novel LVTSCR with embedded clamping diode(DC-LVTSCR) is proposed and verified in a 0.18-μm CMOS process. By embedding a p+implant region into the drain of NMOS in the traditional LVTSCR, a reversed Zener diode is formed by the p+implant region and the n+bridge, which helps to improve the holding voltage and decrease the snapback *** physical mechanisms of the LVTSCR and DC-LVTSCR are investigated in detail by transmission line pulse(TLP)tests and TCAD simulations. The TLP test results show that, compared with the traditional LVTSCR, the DC-LVTSCR exhibits a higher holding voltage of 6.2 V due to the embedded clamping diode. By further optimizing a key parameter of the DC-LVTSCR, the holding voltage can be effectively increased to 8.7 V. Therefore, the DC-LVTSCR is a promising ESD protection device for circuits with the operation voltage of 5.5–7 V.

关键词： electrostatic discharge silicon controlled rectifier clamping diode holding voltage

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