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Stackelberg Game for Wireless Powered and Backscattering Enabled Sensor Networks

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china communications 2024年第3期21卷 189-204页

作者： Lyu bin Cao Yi Wang Shuai Guo Haiyan Hao Chengyao Key laboratory of Ministry of Education in Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and TelecommunicationsNanjing 210003China Jiangsu Engineering research Center of Novel Optical Fiber Technology and Communication Network Suzhou 215006China Guangdong-Hong Kong-Macao Joint laboratory of Human-Machine Intelligence-Synergy Systems Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China

This paper investigates a wireless powered and backscattering enabled sensor network based on the non-linear energy harvesting model, where the power beacon(PB) delivers energy signals to wireless sensors to enable their passive backscattering and active transmission to the access point(AP). We propose an efficient time scheduling scheme for network performance enhancement, based on which each sensor can always harvest energy from the PB over the entire block except its time slots allocated for passive and active information delivery. Considering the PB and wireless sensors are from two selfish service providers, we use the Stackelberg game to model the energy interaction among them. To address the non-convexity of the leader-level problem, we propose to decompose the original problem into two subproblems and solve them iteratively in an alternating manner. Specifically, the successive convex approximation, semi-definite relaxation(SDR) and variable substitution techniques are applied to find a nearoptimal solution. To evaluate the performance loss caused by the interaction between two providers, we further investigate the social welfare maximization problem. Numerical results demonstrate that compared to the benchmark schemes, the proposed scheme can achieve up to 35.4% and 38.7% utility gain for the leader and the follower, respectively.

关键词： backscatter communication energy interaction stackelberg game wireless powered sensor network

A REDUCED-STATE TRELLIS FOR FULL RESPONSE CPM

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Journal of Electronics(china) 1996年第4期13卷 380-383页

作者： Li bin(institute of communications Engineering nanjing 210016)Cheng Shixin(southeast university nanjing 210018)

The error performance of contimuons phase modulation (CPM) with the optimal coherent detection depends on its minimum squared Euclidean distance (MSED). In this paper, a reduced-state trellis for full response CPM is presented under the condition that the MSED is not reduced. and therefore the complexity of the Viterbi decoding is roduced.

关键词： Continuous phase modulation Optimal coherent detection Reduced-state trellis Viterbi decoding

基于最小二乘恒模算法及子空间方法的盲多用户检测算法

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通信学报 2003年第5期24卷 129-133页

作者：刘胜美赵春明东南大学移动通信国家重点实验室江苏南京210096

恒模算法(CMA)是一种广泛应用于阵列处理、均衡、多用户检测中的盲算法。最小二乘恒模算法(LSCMA)由于其全局收敛性及稳定性受到关注,但是它在信噪比较低时性能不是很理想。本文将最小二乘恒模算法与子空间方法相结合,提出一种基于子空... 详细信息

恒模算法(CMA)是一种广泛应用于阵列处理、均衡、多用户检测中的盲算法。最小二乘恒模算法(LSCMA)由于其全局收敛性及稳定性受到关注,但是它在信噪比较低时性能不是很理想。本文将最小二乘恒模算法与子空间方法相结合,提出一种基于子空间分解的恒模算法,称为LSCM_SUB算法。仿真结果表明这种算法的收敛性能比LSCMA要好,尤其是在信噪比低的时候。

关键词：最小二乘恒模算法 LSCMA 子空间 LSCM_SUB 收敛性能盲多用户检测

TESTS AND APPLICATIONS OF A BOUSSINESQ MODEL WITH AMBIENT CURRENT

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Journal of Hydrodynamics 2010年第4期22卷 526-536页

作者： ZHANG Hong-sheng WANG Wei-yuan FENG Wen-jing WANG Ya-ling YANG Jian-min State Key laboratory of Ocean Engineering Shanghai Jiao Tong University Shanghai 200240 China Shanghai Water Planning and Design research Institute Shanghai 200232 China College of Transport and communications Shanghai Maritime University Shanghai 200135 China

A new type Boussinesq model is proposed and applied for wave propagation in a wave flume of uniform depth and over a submerged bar with current present or absent,***,for the propagation of monochromatic incident wave with current absent,the Boussinesq model is tested in its complete form,and in a form without the introduction of utility velocity *** is validated that the introduction of utility velocity variables can improve the characteristics of velocity field,dispersion and *** versions of the Boussinesq models are of higher accuracy than the fully-nonlinear fourth-order model,which is one of the best forms among the existing traditional Boussinesq models that do not incorporate breaking mechanism in one ***,the Boussinesq model in its complete form is applied to simulating the propagation of bichromatic incident waves with current present or absent,respectively,and the modeled results are compared to the analytical ones or the experimental *** modeled results are reasonable in the case of inputting bichromatic incident waves with the strong opposing current present.

关键词： Boussinesq model ambient current wave-wave interactions velocity field bichromatic incident waves

A Dynamic Algorithm of Video Super-resolution Enhancement Based on Adaptive Filter

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A Dynamic Algorithm of Video Super-resolution Enhancement Ba...

走出产品“舒适区”:企业数字化与出口产品转换

第二届和谐人机环境联合学术会议(HHME2006)——第15届中国多媒体学术会议(NCMT'06)

作者： HAN Yu-bing1+, SHU Feng1, 2, RUI Yi-bin1, LI Peng1 1(School of Electronic Engineering & Optoelectronic Techniques, nanjing university of Science & Technology, nanjing 210094, china) 2(national mobile communications research laboratory, southeast university, nanjing 21.096, china)

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中国工业经济 2024年第8期 61-79页

作者：盛斌刘宇英南开大学经济学院南京师范大学

产品转换升级既是出口企业应对外部市场冲击的理性选择,也是推动外贸稳规模优结构目标实现的重要保障。本文从硬件数字要素投入和软件数字要素投入双重视角构建企业数字化水平的衡量指标,考察数字化对出口产品转换行为的影响效应及作用... 详细信息

产品转换升级既是出口企业应对外部市场冲击的理性选择,也是推动外贸稳规模优结构目标实现的重要保障。本文从硬件数字要素投入和软件数字要素投入双重视角构建企业数字化水平的衡量指标,考察数字化对出口产品转换行为的影响效应及作用逻辑。研究发现,数字要素投入越多的企业越倾向于调整出口产品种类,且在三种互斥的产品转换模式中,数字化促使企业选择“淘汰旧产品的同时增加新产品”的转换策略,但该影响仍以提高新增产品率为主,最终导致出口产品范围呈多元化演进态势。机制分析表明,数字化主要通过生产层面(创新驱动和生产率优化提升)与交易层面(出口信息成本削减)强化企业产品转换倾向,但对于转换模式与产品范围,上述三条渠道发挥了不同的作用。进一步研究发现,数字化通过产品转换推动企业出口产品向差异化、高技术密集度和低替代弹性方向迭代升级,且不同类型数字要素投入的作用效果存在显著差异:ICT产品的促进效果强于机器人设备,邮电通信的促进效果强于信息技术服务。本文完善了数字化助力企业摆脱“低端锁定”的逻辑链条,凸显了数字化在进出口促稳提质目标工作中的“稳定器”和“加速器”作用,为中国外贸稳定健康发展提供了理论参考。

关键词：数字化出口产品转换差异化技术密集度

NUMERICAL SIMULATION OF SUMMER CIRCULATION IN THE EAST china SEA AND ITS APPLICATION IN ESTIMATING THE SOURCES OF RED TIDES IN THE YANGTZE RIVER ESTUARY AND ADJACENT SEA AREAS

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Journal of Hydrodynamics 2007年第3期19卷 272-281页

作者： CHEN Xiu-hua ZHU Liang-sheng ZHANG Hong-sheng South china Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Graduate university of the Chinese Academy of Sciences Beijing 100049 China College of Traffic and communications South China University of Technology Guangzhou 510641 China School of Naval Architecture Ocean and Civil Engineering Shanghai Jiaotong University Shanghai 200030 China

Based on the COHERENS （a Coupled Hydrodynamical Ecological model for Regional Shelf seas）, a three-dimensional baroclinic model for the summer of East china Sea （ECS） was established with the sigma-coordinate in the vertical direction and spherical coordinate in the horizontal direction. The circulation patterns of the Kuroshio Current, the Taiwan Warm Current （TWC）, the Tsushima Current and the Yangtze Diluted Water （YDW） were successfully simulated with this model. The calculated results are fairly consistent with previous observations and studies. Based on this baroclinic current field, the Lagranian particles tracking was simulated to estimate the possible origins of the red tides frequently occurring in the Yangtze River estuary and its adjacent sea areas. If there are ＂seeds＂（cysts） of the red tide algae at the seabed of the Taiwan Strait, the offshore of Fujian and Zhejiang Provinces and the northeast Taiwan Island, those are extremely possible sources of the red tides in the Yangtze River estuary and its adjacent sea areas. Field data are needed to confirm it. Numerical simulation to estimate the source of the red tides is a new application of the Lagrangian transport in the marine ecology.

关键词： East china Sea (ECS) Yangtze River estuary,numerical simulation COHEERNS Lagrangian transport red tide the source of the red tides

Multi-layer network architecture in support of end-to-end transparent optical connectivities

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Science china(Information Sciences) 2011年第3期54卷 674-682页

作者： GUO HongXiang , WU Jian, HONG Xiao bin & LIN Jin Tong Key laboratory of Information Photonics and Optical communications, Ministry of Education, Beijing university of Posts and Telecommunications, Beijing 100876, china 1. Key laboratory of Information Photonics and Optical communications Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China

In order to effectively accommodate a wide variety of emerging and future applications with diverse requirements, an intelligent optical network capable of the rapid and resilient delivery of on-demand transparent transmission capacity is required. This paper investigates a multi-layer network architecture where a generalized multiple protocol label switching (GMPLS) controlled transparent wavelength switched optical network (WSON), as the transport core, collaborates with multiple client optical burst switching (OBS) networks distributed at the edge. Dynamic interworking mechanism as well as the related signaling/routing protocol ex- tensions for multi-QoS burst streams transmission among different OBS domains are proposed so as to provision an end-to-end (e2e) transparent optical connectivity with on-demand bandwidth to end-users. Moreover, the survivability of this transparent optical connectivity is also addressed. To validate the feasibility of this architecture, an integrated OBS/WSON network testbed was constructed, and stable e2e transparent connectivities were successfully demonstrated for an efficient multi-QoS burst streams transmission.

关键词： multi-layer network transparent optical network OBS WSON GMPLS

Multi-UAV Collaborative Edge Computing Algorithm for Joint Task Offloading and Channel Resource Allocation

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Journal of communications and Information Networks 2024年第2期9卷 137-150页

作者： Yuting Wei sheng Wu Zhe Ji Zhigang Yu Chunxiao Jiang Linling Kuang School of Information and Communication Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China china Academy of Electronics and Information Technology Beijing 100041China Beijing national research Center for Information Science and Technology Tsinghua Space CenterTsinghua UniversityBeijing 100084China

Unmanned aerial vehicle (UAV)-based edge computing is an emerging technology that provides fast task processing for a wider area. To address the issues of limited computation resource of a single UAV and finite communication resource in multi-UAV networks, this paper joints consideration of task offloading and wireless channel allocation on a collaborative multi-UAV computing network, where a high altitude platform station (HAPS)is adopted as the relay device for communication between UAV clusters consisting of UAV cluster heads (ch-UAVs) and mission UAVs (m-UAVs). We propose an algorithm, jointing task offloading and wireless channel allocation to maximize the average service success rate (ASSR)of a period time. In particular,the simulated annealing(SA)algorithm with random perturbations is used for optimal channel allocation,aiming to reduce interference and minimize transmission delay.A multi-agent deep deterministic policy gradient (MADDPG) is proposed to get the best task offloading strategy. Simulation results demonstrate the effectiveness of the SA algorithm in channel allocation. Meanwhile,when jointly considering computation and channel resources,the proposed scheme effectively enhances the ASSR in comparison to other benchmark algorithms.

关键词： UAV-based edge computing multi-UAV collaboration joint task offloading and wireless channel allocation simulated annealing(SA)algorithm multi-agent deep deterministic policy gradient(MADDPG)