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Chinese Journal of Electronics 2017年第3期26卷 600-607页

作者： TANG Rui ZHAO Jihong QU Hua School of Electronics and Information Engineering Xi'an Jiaotong University School of Communication and Information Engineering Xi'an University of Posts and Telecommunications

Device-to-Device(D2D)communication is viewed as an emerging technology in the fifth generation systems to fully explore the proximate gain residing in local communicating pairs.But the interference imposed to the existing Cellular links(C-link)should be addressed in the optimization for underlaid D2D links(D-link).There is a performance tradeoff between Energy conservation(EC)and the number of links with satisfied quality-of-service(Qo S)requirement or System capacity(SC).We aim to weight the above tradeoff for D-links by specifying it into optimizing EC on the condition that SC is maximized and Qo S requirements of C-links are fully guaranteed.A threestage joint power control and channel assignment mechanism is proposed including feasibility check,SC maximization and greedy optimization for EC.Thanks to numerical results,we illustrate the necessity to conduct our performance tradeoff and observe the gain when multiple resource variables are in elaborate cooperation.

关键词： Device-to-Device(D2D) communication Energy conservation User fairness Resource allocation

Energy-Efficient Cooperative Strategy in RF Energy Harvesting Cognitive Radio Network

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Chinese Journal of Electronics 2019年第3期28卷 651-657页

作者： YAN Feiyu ZHAO Jihong QU Hua XU Xiguang School of Electronic and Information Engineering Xi'an Jiaotong University School of Communication and Information Engineering Xi'an University of Posts and Telecommunications

Energy-efficient cooperative spectrum sharing has become a new trend based on financial and environmental considerations. We focus on a novel energy-efficient cooperative strategy in a Radio frequency(RF) energy harvesting cognitive radio network, where the Secondary user(SU) provides energy supply and relaying assist for the Primary user(PU) in exchange for the transmission opportunities. On the basis of energy and information cooperation, an Energy efficiency(EE)maximization non-convex problem for SU is formulated under the PU’s quality of service(QoS) requirement and energy-causality constraint. With the aid of Dinkebalch’s method and convex optimization technique, a joint time and power allocation scheme is proposed. Numerical results show that the proposed scheme achieves higher SU’s EE and better PU’s QoS guarantee compared to the scheme in which the SU only provides energy for the PU’s transmission.

关键词： Cognitive radio network Radio frequency(RF) energy harvesting Cooperative communication Energy efficiency Resource management

A Robust Fuzzy Time Series Forecasting Method Based on Multi-partition and Outlier Detection

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Chinese Journal of Electronics 2019年第5期28卷 899-905页

作者： QU Hua ZHANG Yanpeng LIU Wei ZHAO Jihong School of Software Engineering Xi'an Jiaotong University School of Electronics and Information Engineering Xi'an Jiaotong University School of Communication and Information Engineering Xi'an University of Posts and Telecommunication

We propose a robust fuzzy time series forecasting method based on multi-partition approach and outlier detection for forecasting market prices. The multipartition approach employs a specific partition criterion for each dimension of the time series. We use a Gaussian kernel version fuzzy C-means clustering to construct the fuzzy logic relationships and detect the outliers by calculating the grade of membership. We apply an additional model, which is trained on the set of outliers by Levenberg-Marquardt algorithm, for forecasting the outliers in testing set. The experiment results show that the proposed method improves the robustness and the average forecasting accuracy rate.

关键词： Fuzzy time series Multi-partition approach Outlier detection

Energy-Efficient Outage Capacity in Sensing-Based Spectrum Sharing Cognitive Radio Networks

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Chinese Journal of Electronics 2018年第6期27卷 1271-1276页

Energy efficiency(EE) is an important metric for a Cognitive radio network(CRN). We focus on the EE maximization problem in a sensing-based spectrum sharing CRN for delay-sensitive applications. With the aid of one-dimension exhaustive search, fractional programming and Lagrange duality method, two energy-efficient optimal sensing time and power allocation policies are derived with the consideration of Average/Peak transmit power(ATP/PTP) constraints and Average interference power(AIP) constraints, respectively. Simulation results show that the proposed policies can achieve higher EE compared to the conventional spectrum sharing schemes.

关键词： Cognitive radio network(CRN) Energy efficiency(EE) Sensing-based spectrum sharing Power allocation

Joint Optimization of Channel Allocation,Link Assignment and Power Control for Device-to-Device Communication Underlaying Cellular Network

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China Communications 2015年第12期12卷 92-100页

Device-to-Device(D2D) communication has been proposed to facilitate cellular network with system capacity(SC) and quality of service(QoS).We consider the design of link assignment(LA),channel allocation(CA)and power control(PC) in D2D-aided content delivery scenario for both user fairness(UF)and system throughput(ST) under QoS requirement.Due to the complexity of the problem,we decompose it into two components:CA is formulated from graph perspective to mitigate severe co-channel interference,which turns out to be the Max K-cut problem;LA and PC are jointly optimized to utilize the gain achieved from CA for supreme performance,and specifically,genetic algorithm(GA) is adopted to optimize LA,but when deriving the fitness of each chromosome,PC optimization will be involved.Thanks to numerical results,we elucidate the efficacy of our scheme.

关键词：网络设备联合优化信道分配功率控制链路分配蜂窝网络通信 QoS要求

Distributed Power Control for Energy Conservation in Hybrid Cellular Network with Device-to-Device Communication

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China Communications 2014年第3期11卷 27-39页

作者： TANG Rui ZHAO Jihong QU Hua School of Electronics and Information Engineering Xi'an Jiaotong University Xi'an 710049 Shaanxi Province P. R. China School of Communication and Information Engineering Xi'an University of Posts and Telecommunications Xi'an 710061 ShaanxiProvince P. R. China

Device-to-Device(D2D) communication has been proposed as a promising implementation of green communication to benefit the existed cellular network.In order to limit cross-tier interference while explore the gain of short-range communication,we devise a series of distributed power control(DPC) schemes for energy conservation(EC)and enhancement of radio resource utilization in the hybrid system.Firstly,a constrained opportunistic power control model is built up to take advantage of the interference avoidance methodology in the presence of service requirement and power constraint.Then,biasing scheme and admission control are added to evade ineffective power consumption and maintain the feasibility of the system.Upon feasibility,a non-cooperative game is further formulated to exploit the profit in EC with minor influence on spectral efficiency(SE).The convergence of the DPC schemes is validated and their performance is confirmed via simulation results.

关键词：分布式功率控制电源控制设备短距离通信混合动力系统蜂窝网络节能资源利用率非合作博弈

Histone crotonylation in neurobiology:to be or not to be?

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Chinese Medical Journal 2022年第9期135卷 1036-1038页

作者： Cechuan Deng Jia-hua qu InKyeom Kim Xiaoqiang Tang Key Laboratory of Birth Defects and Related Diseases of Women and Children of MOE State Key Laboratory of BiotherapyWest China Second University HospitalSichuan UniversityChengduSichuan 610041China Department of Medical Genetics Prenatal Diagnostic CenterWest China Second University HospitalSichuan UniversityChengduSichuan 610041China Laboratory of Cardiovascular Science Intramural Research ProgramNational Institute on AgingNational Institutes of HealthBaltimoreMaryland 21224USA Department of Pharmacology School of MedicineKyungpook National UniversityDaeguRepublic of Korea Cardiovascular Research Institute School of MedicineKyungpook National UniversityDaeguRepublic of Korea Department of Biomedical Science BK21 Plus KNU Biomedical Convergence ProgramSchool of MedicineKyungpook National UniversityDaeguRepublic of Korea

Epigenetic regulation is a pivotal mechanism that controls gene transcription and cell fate.During the past decades,it has been observed that histone,DNA,and RNA modifications participate in determining the fate of neural stem cells(NSCs).These modifications include histone acetylation and methylation,as well as DNA and RNA methylation.Of note,non-coding RNAs also participate in neural differentiation.[1]In addition to acetylation,many other types of acylations to histone lysines,including crotonylation,propionylation,succinylation,and malonylation,have been identified.[2]The roles of these histone acylations in neuroscience remain elusive.

关键词： neural differentiation. modification

Virtual Network Embedding Algorithm for Load Balance with Various Requests

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Chinese Journal of Electronics 2014年第2期23卷 382-387页

作者： WANG Li QU Hua ZHAO Jihong School of Electronic and Information Engineering Xi'an Jiaotong University School of Communication and Information Engineering Xi'an University of Posts and Telecommunications

Virtual network embedding(VNE) is a crucial technology for network virtualization to allocate network resource. Virtual network request in which node and link resource have great disparity will lead to unbalanced resource distribution and lower acceptance ratio of virtual network requests. In this paper, we provide a virtual network embedding algorithm for load balance with various requests. It maps virtual nodes to substrate nodes of which node link residual resource ratio is closest to that of virtual nodes, and then maps the virtual link to physical path using shortest path first algorithm with the link node residual resource ratio constraint. Simulation shows that the provided algorithm can get higher acceptance ratio and network resource utilization for load balance.

关键词： Virtual network embedding Load balance Heuristic algorithm Node mapping Link mapping

Effect of solution treatment on microstructure and mechanical properties of as-cast Al-12Si-4Cu-2Ni-0.8Mg-0.2Gd alloy

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China Foundry 2022年第3期19卷 238-244页

作者： Yu-dong Sui Ye-hua Jiang qu-dong Wang School of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China National Engineering Research Center of Light Alloys Net Forming and State Key Laboratory of Metal Matrix Composite Shanghai Jiao Tong UniversityShanghai 200240China

Effect of solution treatment on microstructure and mechanical properties of Al-12Si-4Cu-2Ni-0.8Mg-0.2Gd alloy was investigated.Results show the Si particles become stable and more intermetallic compounds dissolve in the matrix after solution treatment at 500℃for 2 h followed by 540℃for 3 h(T4).The skeleton-like Al_(3)CuNi develops into two parts in the T4 alloy:one is Al_(3)CuNi which has the framework shape;the other is intermetallics including the Al_(3)CuNi(size:5-10μm)and AlSiCuNiGd phases(size:≤5μm)with complex structure.Adding 0.2%Gd can improve the mechanical properties of the alloys after two-step solution treatment(500℃/2 h followed by 540℃/3 h),the hardness of the alloy increases from 130.9 HV to 135.8 HV compared with the alloy with one-step solution treatment(500℃/2 h),the engineering strength increases from 335.45 MPa to 352.03 MPa and the fracture engineering strain increases from 1.44%to 1.67%.

关键词： Al-Si-Cu-Ni-Mg alloy Gd element solution treatment microstructure mechanical properties

CFD simulations for longwall gas drainage design optimisation

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International Journal of Mining Science and Technology 2017年第5期27卷 777-782页

作者： Qin Johnny qu Qingdong Guo hua Coal Mining Research Program The Commonwealth Scientific and Industrial Research Organisation(CSIRO)Brisbane 883Australia

Computational fluid dynamics(CFD) simulation is an effective approach to develop and optimise gas drainage design for underground longwall coal mining. As part of the project supported by the Australian Government Coal Mining Abatement Technology Support Package(CMATSP), threedimensional CFD simulations were conducted to test and optimise a conceptual design which proposes using horizontal boreholes to replace vertical boreholes at an underground coal mine in Australia.Drainage performance between a vertical borehole and a horizontal borehole was first carried out to compare their capacity and effectiveness. Then a series of cases with different horizontal borehole designs were simulated to optimise borehole configuration parameters such as location, diameter, and number of boreholes. The study shows that the horizontal borehole is able to create low pressure sinks that protect the workings from goaf gas ingresses by changing goaf gas flow directions, and that it has the advantage to continuously maintain such low pressure sinks near the tailgate as the longwall advances. An example of optimising horizontal borehole locations in the longwall lateral direction is also given in this paper.

关键词： Goaf gas drainage Horizontal borehole CFD simulation Design optimisation Mining abatement technology