Results 21 to 30 of about 10,576 (166)
RIS-assisted terahertz frequency band vehicle network capacity optimization [PDF]
, 2023 In order to alleviate the spectrum scarcity and capacity limitation of the current wireless system, the terahertz frequency band was introduced and the reconfigurable intelligent surface (RIS) was used for auxiliary communication to construct a downlink ...
Dan WANG +3 more
core +1 more source
Antenna selection algorithm based on cut-off rate for secure spatial modulation with finite alphabet input [PDF]
, 2020 For the security transmission of artificial noise with finite alphabet inputs in secure spatial modulation system,an antenna selection algorithm based on cut-off rate (COR) was proposed.Considering that it was difficult to obtain the closed-form ...
Qian YANG +3 more
core +1 more source
Gaoya dianqi, 2023 针对风电波动性、间歇性和难预测等严重冲击电网安全运行问题，提出一种利用变分模态分解（VMD）和自适应权重粒子群算法（APSO）获得风电场混合储能系统容量优化配置方法。首先，基于典型日风电输出功率，利用低通滤波法得到满足标准的目标并网功率并获得储能系统参考功率。然后，将其通过VMD分解为高、低频功率，由超级电容器和蓄电池承担。最后，考虑储能充放电功率与荷电状态（SOC）等约束，建立以系统年综合成本最小为目标的容量优化配置模型，采用APSO算法求解并分析最优分界点和对应的储能配置方案 ...
赵峰, 张帆, 陈小强, 王英
doaj
全球能源互联网, 2021 为有效提高多个区域综合能源系统（regional integrated energy system,RIES）的能源利用率,同时合理配置储能系统的容量,提出一种多RIES互联下的共享储能系统容量优化配置模型。首先,介绍了共享储能背景下多RIES运行框架,分析了共享储能系统的运行模式。其次,针对一类包含热电联产机组与热泵等设备的RIES,建立以共享储能系统作为上层、多个RIES作为下层的双层优化配置模型。其中,上层以共享储能系统盈利最大作为目标,利用遗传算法对共享储能的容量、充放电功率进行优化 ...
帅轩越, 王秀丽, 黄晶
doaj +1 more source
Energy efficient resource allocation scheme for AF relay downlink system [PDF]
, 2014 In order to maximize the total energy efficiency of amplify-and-forward relay downlink system,a joint scheme of relay selection and power allocation was proposed with the circuit power of the system.For reducing the computa-tional complexity,a step-by ...
Bo HUANG, Xu-ming FANG, Yu CHEN
core +1 more source
全球能源互联网, 2019 光伏发电具有随机性、间歇性等特点，其大规模接入配电网给电网安全、经济运行带来挑战。储能是解决高渗透率光伏输出功率波动的有效手段。为此，提出一种结合相邻时段实时预测误差和极限学习机的光伏功率区间预测方法；提出一种分布式储能的区间离散SOC均衡控制策略。在此基础上，构建了包含储能运行成本、系统网损和电压偏差的多目标区间优化运行模型。应用区间泰勒展开的仿射算法将不确定区间潮流问题转化为确定性代数方程组实现潮流计算，同时依据电压-功率和网损-功率灵敏度矩阵重新表达目标函数，采用线性规划法求解。最后 ...
袁晓冬 +4 more
doaj +1 more source
Multi-values discrete particle swarm optimization for cross layer resource allocation in cooperative OFDMA systems [PDF]
, 2014 The resource allocation problem in cooperative OFDMA systems with mobile stations (MS) on multi-services was investigated. In order to maximize the sum utility of all MS under per-relay power constraint(PPC), an asymptotic optimal resource allocation ...
Chun-lin XIONG +4 more
core +1 more source
Secure D2D underlaying cellular communication based on artificial noise assisted [PDF]
, 2015 A secure communication scheme based on artificial noise assisted from base station(BS)was proposed to improve the system secrecy rate of the D2D underlaying cellular.Firstly,the system secrecy rate was modeled.Then the BS with multi-antennas added ...
Kai-zhi HUANG +2 more
core +1 more source
A Multifunctional Reducing Molecular Dopant for 16% Efficient Tin Perovskite Solar Cells
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Although lead‐based photovoltaics have seen remarkable progress, tin‐based perovskite solar cells (Sn‐PSCs) continue to face challenges due to their limited power conversion efficiency and insufficient operational stability. The primary cause of this performance gap is the susceptibility of Sn2+ to oxidation, which promotes rapid defect ...
Xianyong Zhou +12 more
wiley +1 more source
Research on critical SNR and power allocation of artificial noise assisted secure transmission [PDF]
, 2019 A comprehensive performance analysis of artificial noise (AN) assisted secure transmission in multiple-input single-output (MISO) wiretap channels was presented.It was shown that the AN scheme did not always improve the security,and provided an exact ...
Hao DENG, Huiming WANG
core +1 more source