Results 71 to 80 of about 10,576 (166)
Guangtongxin yanjiu, 2000 通过对器件结构进行优化设计和择优腐蚀技术 ,用 H3 PO4 - H2 O2 - H2 O系腐蚀液制作了能直接与单模光纤阵列相耦合的 MMI型 Ga As1× 4光功率分配器 .最后用 1 .3 μm波长的He- Ne激光进行了测试 ,发现该器件基本实现了功率均分要求 ,功率离散度为 0 .1 55d B.
马慧莲, 杨建义, 李瑾, 王明华
doaj
Power allocation under per-antenna power constraints in multiuser MIMO systems [PDF]
, 2012 A low-complexity power allocation algorithm was investigated under per-antenna power constraints(PAPC)in multiuser multiple-input multiple-output (MIMO) systems.It was shown that the optimal power allocation subject to PAPC,aimed at maximizing the sum ...
Chen-yang YANG, Sheng-qian HAN
core
Cooperative content downloading scheme based on D2D multicast communications [PDF]
, 2020 Aiming at the content downloading scenario in the network such as cellular network and vehicular network,a cooperative content downloading scheme based on device-to-device multicast communications was proposed to improve the content downloading ...
Chao YUE +4 more
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Gaoya dianqi, 2014 为合理利用无功功率以提高电网稳定性、改善配电网电能质量,笔者提出了配电网用复合型无功功率补偿装置,装置可连续动态补偿电网无功功率,同时兼具谐波治理功能。在分析其补偿原理的基础之上,根据相关试验标准研究了装置的型式试验方法,试验结果证明,装置各相性能指标满足要求,为无功补偿装置结构设计和型式试验提供了参考依据。
李罗, 雷颖, 魏玲燕, 牛帅
doaj
物联网学报工业物联网在实现自动化和智能化生产方面具有巨大的潜力，但现有无线网络难以满足工业控制场景中的低时延、高可靠通信需求。基于此，研究了工业物联网下行短包传输场景中叠加导频（superimposed pilot，SP）功率分配问题，推导了可达传输速率在非完美信道状态信息和最大比发送下的闭合表达式的下限。进一步建立了下行加权和速率最大化问题，并利用逐次凸逼近法将该问题转化为几何规划问题来优化导频和数据功率分配。仿真结果表明所提SP模式下功率优化方案在短包传输中的优越性。
夏文超1，2，徐婧1，2，周星光1，2，吴伟华3，赵海涛1，2
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Joint bandwidth and power allocation algorithm in cognitive radio network with consideration of utility and fairness [PDF]
, 2013 A unified utility function was designed to adapt to different types of services and an optimization problem was formulated based on the network utility maximization model.By applying the Lagrange duality method,a distributed joint bandwidth and power ...
Ji-lei YAN +3 more
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Guangtongxin yanjiu, 2010 在设计与构建星形光纤网络时,常规的方法是根据各条光纤线路的不同损耗,设计出不同分光比的光分路器,对光功率进行不均等分配,最终达到各光节点功率相等。但每个光分路器都是特制的,没有通用性,不利于设计、生产、备用和维修。文章根据目前光接收机输入功率动态范围都比较宽,允许光功率在一定范围内变化的特点,提出用光均分器合理构建和设计星形光纤网,并通过实例介绍了多元光均分网络的构建与设计方法和步骤。
赵长水, 陈正涛, 谭毅, 姚军财
doaj
Power Coordinated Control Strategy for Grid-Connected DC Microgrid Considering State of Charge [PDF]
ObjectivesExisting research on decentralized coordinated control strategies mainly focuses on power distribution within DC microgrid, with limited consideration given to the operation of grid-connected DC microgrids.
LI Hailong +6 more
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Shiyou jixie, 2014 冀东南堡油田井型以定向井和大斜度井为主，水平位移大多在2 000 m以上，井斜多在40°以上，采用常规偏心定量分注技术存在明显的不适应性，而同心管分注技术不能进行投捞测配作业。为此，开展了大斜度井多级分注工艺技术及配套工具研制。开发的大斜度井多级分注技术及配套工具满足了大斜度多级分注井不同跨度、不同井斜的分注要求，具有井下通过能力强，耐高温高压，解封管柱载荷小，配水测调准确等特点。现场应用结果表明，大斜度井多级分注工艺技术最大分注级数达5级5段，施工成功率100%，投捞成功率90%，值得大面积推广应用。
王金忠 +3 more
doaj
User scheduling and power allocation strategy for cell-free networks based on federated learning [PDF]
In order to address the issue of limited training performance in federated learning (FL) due to user link quality disparities and imbalanced communication, and computing resource utilization in cell-free network systems, a joint optimization problem for ...
HUANG Yexia, LI Ling, WANG Huahua
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