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Distributed Source-Load-Storage Cooperative Low-Carbon Scheduling Strategy Considering Vehicle-to-Grid Aggregators

JOURNAL OF MODERN POWER SYSTEMS AND CLEAN ENERGY 2024年第2期12卷 440-453页

作者： Xu, Xiao Qiu, Ziwen Zhang, Teng Gao, Hui Nanjing Univ Posts & Telecommun Sch Automat Nanjing 210023 Peoples R China

The vehicle-to-grid (V2G) technology enables the bidirectional power flow between electric vehicle (EV) batteries and the power grid, making EV-based mobile energy storage an appealing supplement to stationary energy storage systems. However, the stochastic and volatile charging behaviors pose a challenge for EV fleets to engage directly in multi-agent cooperation. To unlock the scheduling potential of EVs, this paper proposes a source-load-storage cooperative low-carbon scheduling strategy considering V2G aggregators. The uncertainty of EV charging patterns is managed through a rolling-horizon control framework, where the scheduling and control horizons are adaptively adjusted according to the availability periods of EVs. Moreover, a Minkowski-sum based aggregation method is employed to evaluate the scheduling potential of aggregated EV fleets within a given scheduling horizon. This method effectively reduces the variable dimension while preserving the charging and discharging constraints of individual EVs. Subsequently, a Nash bargaining based cooperative scheduling model involving a distribution system operator (DSO), an EV aggregator (EVA), and a load aggregator (LA) is established to maximize the social welfare and improve the low-carbon performance of the system. This model is solved by the alternating direction method of multipliers (ADMM) algorithm in a distributed manner, with privacy of participants fully preserved. The proposed strategy is proven to achieve the objective of low-carbon economic operation.

关键词： Scheduling Uncertainty Electric vehicle charging Computational modeling Vehicle-to-grid Carbon Behavioral sciences Electric vehicle (EV) low-carbon scheduling mobile storage system Nash bargaining power flexibility alternating direction method of multipliers (ADMM) ENERGY SYSTEM

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Sum-Rate Maximization in Active RIS-Assisted Multi-Antenna WPCN

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CHINA COMMUNICATIONS 2024年第6期21卷 1-17页

作者： Jie, Jiang Bin, Lyu Chen, Pengcheng Zhen, Yang Nanjing Univ Posts & Telecommun Sch Commun & Informat Engn Nanjing 210003 Peoples R China nanjing univ Jiangsu Prov Key Lab Photon & Elect Mat Sci & Tech Nanjing Peoples R China

In this paper, we propose an active reconfigurable intelligent surface (RIS) enabled hybrid relaying scheme for a multi -antenna wireless powered communication network (WPCN), where the active RIS is employed to assist both wireless energy transfer (WET) from the power station (PS) to energyconstrained users and wireless information transmission (WIT) from users to the receiving station (RS). For further performance enhancement, we propose to employ both transmit beamforming at the PS and receive beamforming at the RS. We formulate a sumrate maximization problem by jointly optimizing the RIS phase shifts and amplitude reflection coefficients for both the WET and the WIT, transmit and receive beamforming vectors, and network resource allocation. To solve this non -convex problem, we propose an efficient alternating optimization algorithm with the linear minimum mean squared error criterion, semidefinite relaxation (SDR) and successive convex approximation techniques. Specifically, the tightness of applying the SDR is proved. Simulation results demonstrate that our proposed scheme with 10 reflecting elements (REs) and 4 antennas can achieve 17.78% and 415.48% performance gains compared to the single -antenna scheme with 10 REs and passive RIS scheme with 100 REs, respectively.

关键词： active reconfigurable intelligent surface beamforming sum-rate maximization wireless pow- ered communication network WIRELESS INFORMATION RESOURCE-ALLOCATION RADIO FRAMEWORK

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Simulation Research of IEEE802.16a Single Carrier Frequency Domain Equalization Scheme

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China Communications 2007年第2期4卷 46-53页

作者： Zhang Guobin Feng Guangzeng Nanjing Univ Posts & Telecommun Nanjing 210003 Peoples R China

IEEE 802.16a is a wideband wireless access standard of the new generation,which is submitted by ITU on Apr. 2002.The standard advises to use OFDM or Single Carrier Frequency Domain Equalization in physical layer.As a part of the national 863 research project,this paper investigates SC-FDE scheme of wideband wireless access systems.We set up an integrate simulation platform and put forward a SC-FDE scheme combining with MIMO and RS-CC to improve the system performance further.

关键词： IEEE 802.16a single carrier frequency domain equalization MIMO RS-CC

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双声部结构的变奏曲：《金色笔记》的文本意义生成机制

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外国文学研究 2013年第5期35卷 135-140页

作者：颜文洁 nanjing Normal univ Sch Foreign Languages Nanjing 210009 Peoples R China Nanjing Univ Posts & Telecommun Nanjing 210023 Jiangsu Peoples R China

莱辛的长篇小说《金色笔记》不仅反映了后现代社会中人的精神状况,"触摸"了20世纪中叶意识形态的脉搏,而且构造了一个独特的变奏曲式的双声部结构。该结构以五线谱的形式,通过主音线"自由女性"(第五线)与"黑色笔记"、"红色笔记"、"黄色... 详细信息

莱辛的长篇小说《金色笔记》不仅反映了后现代社会中人的精神状况,"触摸"了20世纪中叶意识形态的脉搏,而且构造了一个独特的变奏曲式的双声部结构。该结构以五线谱的形式,通过主音线"自由女性"(第五线)与"黑色笔记"、"红色笔记"、"黄色笔记"和"蓝色笔记"这第四至第一条线,构成主旋律声部与副旋律声部的先后四次变奏,营造出《金色笔记》的主旋律,即自由、信仰、爱情、精神、生存等各种危机构成的谐音,创造了人物、内心、文本、文化的对话构建的意义生成机制。同时,作家以小说创作与注释和议论形成的双声部,表明人生的荒谬和价值就在于过程之中,生活如此,文学创作也是如此。

关键词：莱辛《金色笔记》文本变奏曲双声部

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Study on Performance of Wireless Multihop Networks Using MIMO MRC and MIMO MRT

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China Communications 2007年第2期4卷 64-68页

作者： Ye Xinrong Song Jianxin Nanjing Univ Posts & Telecommun Coll Telecommun & Informat Engn Nanjing 210003 Peoples R China

This paper presents the concepts of completely connected network,mean path length and cluster for analysis performance of wireless multihop network,where matrix are used to express topology of network and use a new algorithm to compute the number of cluster in the network.Multiple-input/multiple-output(MIMO) communication promises performance enhancement over conventional single-input/single-output(SISO) technology for the same radiated power,if leveraged in multihop network,MIMO may be able to provide significant network performance improvement in network robustness and in power consumption,this paper analyzes three types of multihop networks employing SISO, MIMO with maximum ratio combining(MRC) and MIMO with maximum ratio transmission(MRT) as link model respectively,and get that using MIMO link model can increase robust,decrease mean path length by simulation.

关键词： multiple-input/multiple-output(MIMO) wireless multihop network maximum ratio combining(MRC) maximum ratio transmission(MRT) single-input/single-output(SISO)

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Incentive Schemes of Nodes for Ad Hoc and Multi-hop Cellular Networks

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China Communications 2007年第4期4卷 79-88页

作者： Wang Kun Wu Meng Nanjing Univ Posts & Telecommun Inst Commun & Informat Engn Nanjing 210003 Peoples R China

Nodes cooperation is a significant prerequisite for the realization of the relaying Ad Hoc.While with the development of multi-hop cellular networks, how to stimulate intermediate nodes to do the packet-forwarding deserves more concerning.At present research,the incentive schemes in pure Ad Hoc and multi-hop cellular networks are analyzed and compared to classify the strengths and drawbacks of each scheme.We explain in particular what the key issues are to implement incentive schemes for cooperation. Finally,an incentive scheme based on integration of reputation and charging systems is proposed not only to block the existence of selfish nodes,but to satisfy the rational requirement of nodes.

关键词： node cooperation incentive scheme in-depth summary multi-hop cellular networks Ad Hoc security

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Water-soluble light-emitting nanoparticles prepared by non-covalent bond self-assembly of a hydroxyl group functionalized oligo(p-phenyleneethynylene) with different water-soluble polymers

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Science China Chemistry 2010年第5期53卷 1121-1126页

作者： Lu XiaoMei Fan QuLi Zhang GuangWei Pu KanYi Huang Wei Nanjing Univ Posts & Telecommun Jiangsu Key Lab Organ Elect & Informat Displays Nanjing 210046 Peoples R China Nanjing Univ Posts & Telecommun Inst Adv Mat Nanjing 210046 Peoples R China

Water-soluble light-emitting nanoparticles were prepared from hydroxyl group functionalized oligos(p-phenyleneethynylene) (OHOPEL) and water-soluble polymers(PEG,PAA,and PG) by non-covalent bond self-assembly.Their structure and optoelectronic properties were investigated through dynamic light scattering(DLS) ,UV and PL spectroscopy.The optical properties of OHOPEL-based water-soluble nanoparticles exhibited the same properties as that found in OHOPEL films,indicating the existence of interchain-aggregation of OHOPELs in the nanoparticles.OHOPEL-based nanoparticles prepared from conjugated oligomers show smaller size and lower dispersity than nanoparticles from conjugated polymers,which means that the structures of water-soluble nanoparticles are linked to the conjugated length.Furthermore,the OHOPEL/PG and OHOPEL/PAA systems produced smaller particles and lower polydispersity than the OHOPEL/PEG system,indicating that there may exist influence of the strength of non-covalent bonds on the size and degree of dispersity of the nanoparticles.

关键词： water-soluble oligo(p-phenyleneethynylene) fluorescence nanoparticles

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Resource Allocation for Cognitive Network Slicing in PD-SCMA System Based on Two-Way Deep Reinforcement Learning

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CHINA COMMUNICATIONS 2024年第6期21卷 1-16页

作者： Zhang, Zhenyu Zhang, Yong Yuan, Siyu Cheng, Zhenjie Beijing univ posts & telecommun Sch Elect Engn Beijing 100876 Peoples R China Beijing univ posts & telecommun Beijing Key Lab Work Safety Intelligent Monitoring Beijing 100876 Peoples R China

In this paper, we propose the Two-way Deep Reinforcement Learning (DRL)-Based resource allocation algorithm, which solves the problem of resource allocation in the cognitive downlink network based on the underlay mode. Secondary users (SUs) in the cognitive network are multiplexed by a new Power Domain Sparse Code Multiple Access (PD-SCMA) scheme, and the physical resources of the cognitive base station are virtualized into two types of slices: enhanced mobile broadband (eMBB) slice and ultrareliable low latency communication (URLLC) slice. We design the Double Deep Q Network (DDQN) network output the optimal codebook assignment scheme and simultaneously use the Deep Deterministic Policy Gradient (DDPG) network output the optimal power allocation scheme. The objective is to jointly optimize the spectral efficiency of the system and the Quality of Service (QoS) of SUs. Simulation results show that the proposed algorithm outperforms the CNDDQN algorithm and modified JEERA algorithm in terms of spectral efficiency and QoS satisfaction. Additionally, compared with the Power Domain Non-orthogonal Multiple Access (PD-NOMA) slices and the Sparse Code Multiple Access (SCMA) slices, the PD-SCMA slices can dramatically enhance spectral efficiency and increase the number of accessible users.

关键词： cognitive radio deep reinforcement learn- ing network slicing Power-domain Non-orthogonal Multiple Access resource allocation NOMA DOWNLINK UPLINK

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PERFORMANCE ANALYSIS OF CHANNEL ESTIMATION FOR LDPC-CODED OFDM SYSTEM IN MULTIPATH FADING CHANNEL

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Journal of Electronics(China) 2006年第6期23卷 801-805页

作者： Zhu Qi Li Hao Feng Guangzeng Dept of Commun. Eng. Nanjing Univ. of Posts and Telecommun. Nanjing 210003 China

In this paper, the channel estimation techniques for Orthogonal Frequency Division Multiplexing (OFDM) systems based on pilot arrangement are studied and we apply Low Density Parity Check (LDPC) codes to the system of IEEE 802.16a with OFDM modulation. First investigated is the influence of channel es-timation schemes on LDPC-code based OFDM system in static and multipath fading channels. According to the different propagation environments in 802.16a system, a dynamic channel estimation scheme is proposed. A good irregular LDPC code is designed with code rate of 1/2 and code length of 1200. Simulation results show that the performance of LDPC coded OFDM system proposed in this paper is better than that of the convolution Turbo coded OFDM system proposed in IEEE standard 802.16a.

关键词：正交频率分割多路技术低密度奇偶性检验 LDPC 信道估计多路衰落信道

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Co-Sharing Waveform Design for Millimeter-Wave Radar Communication Systems

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CHINA COMMUNICATIONS 2024年第6期21卷 1-14页

作者： Cui, Gaofeng He, Mengmin Xu, Lexi Wang, Changheng Wang, Weidong Beijing univ posts & telecommun Sch Elect Engn Beijing 100876 Peoples R China Beijing univ posts & telecommun Key Lab Universal Wireless Commun Minist Educ Beijing 100876 Peoples R China China United Network Commun Corp Beijing 100048 Peoples R China

Millimeter -wave (mmWave) radar communication has emerged as an important technique for future wireless systems. However, the interference between the radar signal and communication data is the main issue that should be considered for the joint radar communication system. In this paper, a co -sharing waveform (CSW) is proposed to achieve communication and radar sensing simultaneously. To eliminate the co -interference between the communication and sensing signal, signal splitting and processing methods for communication data demodulation and radar signal processing are given respectively. Simulation results show that the bit error rate (BER) of CSW is close to that of the pure communication waveform. Moreover, the proposed CSW can achieve better performance than the existing waveforms in terms of range and velocity estimation.

关键词： co-sharing waveform millimeter-wave radar communication radar sensing range and veloc- ity estimation JOINT RADAR INFORMATION

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