Results 41 to 50 of about 10,576 (166)
Guangtongxin yanjiu, 2019 在超密集网络场景中,针对以用户为中心的重叠虚拟小区系统的和速率的最大化,提出了一种基于效用函数最优化模型的功率分配方案。通过分层交替迭代算法求解最佳功率分配,首先将原问题分解为功率分割和虚拟功率分配两个子问题;然后在高层功率分割中引入拉格朗日函数,求解出一种基于均衡策略的最佳功率分割算法,在底层利用虚拟功率完成进一步的功率分配。由于功率分割系数采用了最大化信干漏比（SLNR）的特征矢量形式,从而实现了信号增强与干扰减少之间的均衡。仿真结果表明,该算法在性能上优于传统的功率分配算法,有效减少了干扰 ...
鲁楠, 秦洪峰, 孙长印, 江帆
doaj
物联网学报设备对设备（D2D, device-to-device）通信是一种能够有效提高蜂窝网络频谱效率的短距离通信技术。联合考虑上下行子信道全频域资源复用，针对蜂窝网络中“多对多”的复杂情况（即一个子信道可以分配给多对D2D用户设备（DUE, D2D user equipment），一对DUE也可以同时使用多个子信道），提出了一种两阶段子信道和功率联合分配方案。第一阶段，提出基于加权二部图匹配的资源分配（WBGM-RA, weighted bipartite graph matching-based ...
申滨，元文军，李旋
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Design and Implementation of Wind Turbine Background Monitoring and Management Platform [PDF]
, 2016 随着经济的不断发展，人类对传统的化石资源的开发速度越来越快，地球上的化石资源也越来越匮乏。要想保证能源的可持续利用，保证人们的资源消费需求。节约使用石化能源、开发利用新能源和可再生能源十分关键。而风力发电作为能源当中重要的电力行业，已成为全世界各个国家大力发展的重要新能源之一。 在中国，全国平均风功率密度为100W/m2，风能资源的总储量约为32.26亿kw，现行可供开发的资源共计约10亿kw，其中包含了2.53亿kw陆地风能和7.5亿kw近海风能。风的可利用区域分布广阔，装机数量多 ...
熊菲
core
Optimization scheme for the SWIPT-NOMA opportunity cooperative system [PDF]
, 2020 In order to improve the spectrum efficiency and performance of the simultaneous wireless information and power transfer (SWIPT) system,the non-orthogonal multiple access (NOMA) technology was introduced to construct the SWIPT-NOMA opportunistic relay ...
Qianli NING, Taoshen LI, Zhe WANG
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World Water Policy, Volume 11, Issue 4, Page 939-952, November 2025.ABSTRACT This study reviews the status of access to water supply, sanitation, and solid waste management (SWM) services in Uganda, examining the influence of national government policies, institutional frameworks, and financing mechanisms. It employs a mixed‐methods approach, combining qualitative analysis of primary data from key informant interviews ...
Ronald Sakaya +3 more
wiley +1 more source
Gaoya dianqi, 2017 微电网中传统的下垂控制方法能够实现多电压型逆变器的并联,但难以实现功率的精确分配。文中提出一种基于递推最小二乘法的改进下垂控制方法:首先利用单向低速通信线获取交流母线电压参数后,在本地采用在线递推最小二乘法获得准确线路参数;然后在引入的功率等效阻抗概念基础上,考虑线路参数及本地负荷对多逆变器功率分配的影响,求出准确补偿功率传输参数不匹配情况的虚拟阻抗值,最终可实现多逆变器功率精确分配。MATLAB仿真结果表明:该策略可及时响应本地负荷变动,功率分配效果及动态性能均优于传统下垂控制。
许钒, 胡长斌, 王斐然, 王弋飞
doaj
Enhanced zebra optimization algorithm and applications of power allocation in SDWN [PDF]
To address the issue of interference caused by shared resources in multi-user communications in software defined wireless network (SDWN), an enhanced zebra optimization algorithm (EZOA) was proposed to achieve power allocation that maximizes the secrecy ...
DONG Ligang, JIANG Xian, LI Jiajia
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Wildlife Letters, Volume 3, Issue 3, Page 91-98, September 2025.The edge densities of cropland, developed land, and water bodies (panel a) predict the spatial probability of mammalian predation on wild turkeys (panel b) using Mahalanobis distance factor analysis in Quitman County, Mississippi, United States. The three habitat fragmentation variables are represented by three arrows, respectively.
Guiming Wang +2 more
wiley +1 more source
Guangtongxin yanjiu, 2015 针对中继网络的两跳特性,提出一种多小区中继网络两跳速率匹配资源分配算法。首先,在第一个子时隙内各小区独立地为小区中所有用户分配子载波,并根据子载波分配结果,建立基于非合作博弈的功率分配模型;然后,由第一跳资源分配结果对第二跳速率匹配,自适应地为中继分配资源以满足边缘用户的速率需求。仿真结果表明,该算法在满足边缘用户速率需求的前提下,进一步提高了中心用户的吞吐量,同时降低了系统的发射功率,从而提升了系统性能。
文凯, 喻昉炜
doaj
Communication-radar coexistence design based on block diagonalization [PDF]
, 2021 Aiming at the problem of coexistence of communication and radar at the same frequency， a block diagonalization design scheme was proposed.Firstly， an optimization problem was established to maximum the communication system’s sum rate subject to no ...
Kaifeng HAN +3 more
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