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Dynamic Event-Triggered Consensus Control for Input Constrained Multi-Agent Systems With a Designable Minimum Inter-Event Time
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作者 Meilin Li Yue Long +2 位作者 Tieshan Li Hongjing Liang C.L.Philip Chen 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2024年第3期649-660,共12页
This paper investigates the consensus control of multi-agent systems(MASs) with constrained input using the dynamic event-triggered mechanism(ETM).Consider the MASs with small-scale networks where a centralized dynami... This paper investigates the consensus control of multi-agent systems(MASs) with constrained input using the dynamic event-triggered mechanism(ETM).Consider the MASs with small-scale networks where a centralized dynamic ETM with global information of the MASs is first designed.Then,a distributed dynamic ETM which only uses local information is developed for the MASs with large-scale networks.It is shown that the semi-global consensus of the MASs can be achieved by the designed bounded control protocol where the Zeno phenomenon is eliminated by a designable minimum inter-event time.In addition,it is easier to find a trade-off between the convergence rate and the minimum inter-event time by an adjustable parameter.Furthermore,the results are extended to regional consensus of the MASs with the bounded control protocol.Numerical simulations show the effectiveness of the proposed approach. 展开更多
关键词 Constrained input designable minimum inter-event time directed communication topology dynamic event-triggered mechanism MASs consensus control
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Construction of Split-Plot Designs with General Minimum Lower Order Confounding
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作者 Kexin Li Beichen Han Zhenzhen Niu 《Open Journal of Applied Sciences》 CAS 2023年第3期261-274,共14页
Fractional factorial split-plot design has been widely used in many fields due to its advantage of saving experimental cost. The general minimum lower order confounding criterion is usually used as one of the attracti... Fractional factorial split-plot design has been widely used in many fields due to its advantage of saving experimental cost. The general minimum lower order confounding criterion is usually used as one of the attractive design criterion for selecting fractional factorial split-plot design. In this paper, we are interested in the theoretical construction methods of the optimal fractional factorial split-plot designs under the general minimum lower order confounding criterion. We present the theoretical construction methods of optimal fractional factorial split-plot designs under general minimum lower order confounding criterion under several conditions. 展开更多
关键词 Fractional Factorial design General minimum Lower Order Confounding Criterion Split-Plot design
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APPLICATION OF MINIMUM PROJECTION UNIFORMITY CRITERION IN COMPLEMENTARY DESIGNS 被引量:4
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作者 宋硕 覃红 《Acta Mathematica Scientia》 SCIE CSCD 2010年第1期180-186,共7页
In this article, we consider the characterization problem in design theory. The objective is to characterize minimum projection uniformity for two-level designs in terms of their complementary designs. Here, the compl... In this article, we consider the characterization problem in design theory. The objective is to characterize minimum projection uniformity for two-level designs in terms of their complementary designs. Here, the complementary design means a design in which all the Hamming distances of any two runs are the same, which generalizes the concept of a pair of complementary designs in the literature. Based on relationships of the uniformity pattern between a pair of complementary designs, we propose a minimum projection uniformity (MPU) rule to assess and compare two-level factorials. 展开更多
关键词 minimum projection uniformity complementary design uniformity pattern
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NEW APPROACH FOR RELIABILITY-BASED DESIGN OPTIMIZATION:MINIMUM ERROR POINT 被引量:5
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作者 LIU Deshun YUE Wenhui +1 位作者 ZHU Pingyu DU Xiaoping 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2006年第4期514-518,共5页
Conventional reliability-based design optimization (RBDO) requires to use the most probable point (MPP) method for a probabilistic analysis of the reliability constraints. A new approach is presented, called as th... Conventional reliability-based design optimization (RBDO) requires to use the most probable point (MPP) method for a probabilistic analysis of the reliability constraints. A new approach is presented, called as the minimum error point (MEP) method or the MEP based method, for reliability-based design optimization, whose idea is to minimize the error produced by approximating performance functions. The MEP based method uses the first order Taylor's expansion at MEP instead of MPP. Examples demonstrate that the MEP based design optimization can ensure product reliability at the required level, which is very imperative for many important engineering systems. The MEP based reliability design optimization method is feasible and is considered as an alternative for solving reliability design optimization problems. The MEP based method is more robust than the commonly used MPP based method for some irregular performance functions. 展开更多
关键词 Reliability Most probable point (MPP) minimum error point (MEP)Reliability-based design optimization (RBDO)
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Decomposition of Mathematical Programming Models for Aircraft Wing Design Facilitating the Use of Dynamic Programming Approach
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作者 Prashant K. Tarun Herbert W. Corley 《American Journal of Operations Research》 2023年第5期111-131,共21页
Aircraft designers strive to achieve optimal weight-reliability tradeoffs while designing an aircraft. Since aircraft wing skins account for more than fifty percent of their structural weight, aircraft wings must be d... Aircraft designers strive to achieve optimal weight-reliability tradeoffs while designing an aircraft. Since aircraft wing skins account for more than fifty percent of their structural weight, aircraft wings must be designed with utmost care and attention in terms of material types and thickness configurations. In particular, the selection of thickness at each location of the aircraft wing skin is the most consequential task for aircraft designers. To accomplish this, we present discrete mathematical programming models to obtain optimal thicknesses either to minimize weight or to maximize reliability. We present theoretical results for the decomposition of these discrete mathematical programming models to reduce computer memory requirements and facilitate the use of dynamic programming for design purposes. In particular, a decomposed version of the weight minimization problem is solved for an aircraft wing with thirty locations (or panels) and fourteen thickness choices for each location to yield an optimal minimum weight design. 展开更多
关键词 Aircraft Wing design Maximum Reliability design minimum Weight design Dynamic Programming OPTIMIZATION DECOMPOSITION
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油水气混合的数字化微量润滑装置
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作者 陶桂宝 王丽丹 朱怡澄 《重庆大学学报》 CAS CSCD 北大核心 2024年第9期61-69,共9页
微量润滑装置对油水气量的准确控制及其雾化效果,将直接影响切削冷却效果,进而影响零件加工质量。为改善微量润滑装置的辅助切削效果,研制了一种具有油水气混合的数字化微量润滑装置,有效改善了润滑油雾喷射的连续性和均匀性。基于微量... 微量润滑装置对油水气量的准确控制及其雾化效果,将直接影响切削冷却效果,进而影响零件加工质量。为改善微量润滑装置的辅助切削效果,研制了一种具有油水气混合的数字化微量润滑装置,有效改善了润滑油雾喷射的连续性和均匀性。基于微量润滑雾化技术,设计开发了数字化微量润滑装置,搭建铣削工艺实验平台,测试新型微量润滑装置的辅助切削效果。结果表明,所研制的油水气混合的数字化微量润滑装置能够明显提高油雾质量和辅助切削效果。 展开更多
关键词 微量润滑 油水气混合 雾化 喷嘴设计 装置
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基于Bentley平台的铁路工程BIM设计关键共性技术研究 被引量:1
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作者 何守旺 《铁道标准设计》 北大核心 2024年第5期22-28,共7页
铁路工程站前、站后各专业在开展BIM设计研发工作中存在研发进度不均衡、基础功能重复开发、应用标准不统一等问题,针对铁路工程BIM设计的基础、共性技术进行研究,并提出完成相关API库与程序开发的技术方案。通过对铁路线路空间位置计算... 铁路工程站前、站后各专业在开展BIM设计研发工作中存在研发进度不均衡、基础功能重复开发、应用标准不统一等问题,针对铁路工程BIM设计的基础、共性技术进行研究,并提出完成相关API库与程序开发的技术方案。通过对铁路线路空间位置计算API库、基于线路中线的BIM模型构件布设与拼装、基于最小设计单元的专业结构树、BIM模型构件非几何信息添加、BIM模型剖切5项关键共性技术的研究,以Bentley平台为依托,采用C++/CLI混编和WebService技术,构建铁路线路空间位置计算API库与通用函数库,以最小设计单元的方式建立了专业结构树,利用.NET API二次开发接口,研发了铁路工程BIM设计辅助工具。该API库已在专业BIM设计系统研发中进行了集成与调用,辅助工具已在BIM设计中进行了应用。应用表明,该技术方案可提高铁路线路相关功能的研发效率,具有一定参考借鉴意义。 展开更多
关键词 铁路工程 Bentley平台 BIM设计 API库 最小设计单元 专业结构树
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敏捷设计新趋势:人工智能融入最小可行性产品设计的探究
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作者 瞿安琪 张杨 《北京印刷学院学报》 2024年第7期64-71,共8页
为探究人工智能在最小可行性产品(MVP)设计中的应用及其对提升设计效率与产品质量的影响,本研究采用了案例分析方法,以智能滑雪眼镜为例,深入研究了聊天机器人程序(Chat Generative Pre-trained Transformer,简称ChatGPT)在产品设计流... 为探究人工智能在最小可行性产品(MVP)设计中的应用及其对提升设计效率与产品质量的影响,本研究采用了案例分析方法,以智能滑雪眼镜为例,深入研究了聊天机器人程序(Chat Generative Pre-trained Transformer,简称ChatGPT)在产品设计流程中的集成应用。通过实证分析研究揭示了ChatGPT能够显著优化设计流程,提高设计决策的准确性,加速产品原型的迭代过程,并通过精确捕捉市场需求和用户偏好,提升产品的市场竞争力。研究结果表明,将人工智能技术融入MVP设计,能够有效提升设计效率和产品质量。此外,研究还强调了未来发展中需加强用户参与和负责任设计的重要性,以推动设计方法论的进一步创新。 展开更多
关键词 敏捷设计 最小可行性产品 人工智能 ChatGPT 设计效率
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基于非线性规划法的最小阻力船型设计
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作者 彭冲冲 丁嘉伟 张孟 《舰船科学技术》 北大核心 2024年第18期87-90,共4页
最小阻力船型设计可以有效减少燃油消耗和污染物排放。船型设计是一个多目标优化过程,本文提出一种基于非线性规划法的最小阻力船型设计方法,对设计流程进行详细分析,定义和选择设计变量,并确定设计的约束条件,提出将遗传算法应用于最... 最小阻力船型设计可以有效减少燃油消耗和污染物排放。船型设计是一个多目标优化过程,本文提出一种基于非线性规划法的最小阻力船型设计方法,对设计流程进行详细分析,定义和选择设计变量,并确定设计的约束条件,提出将遗传算法应用于最小阻力船型设计,给出船型结构和优化后的前半体横剖线图,对优化前后的兴波阻力系数、摩擦阻力系数和形状阻力系数进行计算和对比,结果表明基于非线性规划法可以有效减小船舶阻力,且船舶兴波阻力系数减小较多。 展开更多
关键词 非线性规划法 最小阻力 船型设计 兴波阻力
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BDS机载天线增益适航性分析与验证
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作者 刘瑞华 王彦军 +1 位作者 马赞 马琬淇 《无线电工程》 2024年第4期984-991,共8页
基于航空无线电技术委员会(Radio Technical Committee for Aeronautics,RTCA)等的相关技术标准,结合卫星通信链路预算理论,给出全球导航卫星系统(Global Navigation Satellite System,GNSS)机载天线增益适航性分析的理论方法,并对北斗... 基于航空无线电技术委员会(Radio Technical Committee for Aeronautics,RTCA)等的相关技术标准,结合卫星通信链路预算理论,给出全球导航卫星系统(Global Navigation Satellite System,GNSS)机载天线增益适航性分析的理论方法,并对北斗卫星导航系统(Beidou Navigation Satellite System,BDS)机载天线增益进行适航性分析计算。以BDS机载天线增益适航性分析结果为设计指标进行BDS B1I频段机载无源天线的验证设计与仿真。BDS机载无源天线仿真结果满足设计指标,并具有良好的低仰角增益与圆极化性能。证明了所给GNSS机载天线增益适航性分析方法的可行性与BDS机载天线增益适航性分析结果的合理性。 展开更多
关键词 北斗卫星导航系统 机载天线适航性 最低工作性能标准 机载天线设计
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基于三维模型的爆破设计优化及工程应用 被引量:1
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作者 张程娇 鲁力 +4 位作者 李宏兵 周桂松 冷振东 田水龙 张剑春 《露天采矿技术》 CAS 2024年第3期62-65,共4页
基于GIS技术研发了e-blast智能化三维爆破设计软件,实现了基于三维模型的智能化炮孔设计、装药设计、联网设计、效果评估与评价。结果表明:通过软件与智能化钻机数据交互,钻孔精度提高17%,设计和钻孔施工综合效率提高30%,并提高了爆破质... 基于GIS技术研发了e-blast智能化三维爆破设计软件,实现了基于三维模型的智能化炮孔设计、装药设计、联网设计、效果评估与评价。结果表明:通过软件与智能化钻机数据交互,钻孔精度提高17%,设计和钻孔施工综合效率提高30%,并提高了爆破质量,促进了矿山开采少人化,降低了安全风险。 展开更多
关键词 精细爆破 智能化爆破 三维设计 切片缓存模型 最小抵抗线
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基于智能算法的齿轮副传动优化设计
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作者 薛哲元 徐江 《重型机械》 2024年第2期93-98,共6页
为对两级渐开线圆柱齿轮减速器的齿轮结构进行优化设计,根据齿轮强度计算标准和机械结构优化设计的相关理论,分析了对齿轮接触强度和弯曲强度较大有影响的参数,以最小中心距为目标函数,以齿轮强度、尺寸等为约束条件,建立了两级渐开线... 为对两级渐开线圆柱齿轮减速器的齿轮结构进行优化设计,根据齿轮强度计算标准和机械结构优化设计的相关理论,分析了对齿轮接触强度和弯曲强度较大有影响的参数,以最小中心距为目标函数,以齿轮强度、尺寸等为约束条件,建立了两级渐开线圆柱齿轮传动结构优化的数学模型。基于智能算法(遗传算法)对齿数、模数、螺旋角等参数进行多目标优化,优化后齿轮的最小中心距减少了28.99%,有效的提高了空间利用率。同时该文研究结果可为智能设计、智能制造提供参考。 展开更多
关键词 渐开线圆柱齿轮 接触强度 智能设计 遗传算法 最小中心距
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基于流体动力学仿真的微量润滑喷嘴参数优化
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作者 王杰伟 《机械工程师》 2024年第9期73-78,共6页
微量润滑(MQL)切削技术在切削加工中获得了良好的加工效果,其中喷嘴参数对微量润滑性能有着重要影响。为改善和优化微量润滑性能,采用正交试验法和ANSYS Fluent软件对气相窄流区宽度、锥度、输出管长度、气相窄流区长度、输出孔径、流量... 微量润滑(MQL)切削技术在切削加工中获得了良好的加工效果,其中喷嘴参数对微量润滑性能有着重要影响。为改善和优化微量润滑性能,采用正交试验法和ANSYS Fluent软件对气相窄流区宽度、锥度、输出管长度、气相窄流区长度、输出孔径、流量等6个因素的影响进行了流体动力学的数值仿真研究和统计分析。结果表明,在不同评价标准下,6个影响因素的主次顺序不同;影响综合指数的最重要参数为距离喷嘴0.1 m处的喷射截面分散程度,影响综合指数的优先顺序为:距离喷嘴0.1 m处的喷射截面分散程度>距离喷嘴0.2 m处的喷射截面分散程度>离喷嘴0.3 m处的喷射截面分散程度>喷射方向衰减率>离喷嘴0.05 m处的喷射绝对速度;喷嘴参数的最优组合为:输出孔径1.5 mm、输出管长度0.5 mm、锥度45°、气相窄流区宽度0.2 mm、气相窄流区长度0.5 mm、流量40 L/min。 展开更多
关键词 微量润滑 喷嘴设计 正交试验设计 计算流体动力学
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Inverse Kinematics Analysis of a 7-DOF Space Manipulator for Trajectory Design 被引量:5
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作者 Pengfei Xin Jili Rong +1 位作者 Yongtai Yang Dalin Xiang 《Journal of Beijing Institute of Technology》 EI CAS 2017年第3期285-291,共7页
To solve the inverse kinematics problem for redundant degrees of freedom(DOFs)manipulators has been and still continues to be quite challenging in the field of robotics.Aiming at trajectory planning for a 7-DOF spac... To solve the inverse kinematics problem for redundant degrees of freedom(DOFs)manipulators has been and still continues to be quite challenging in the field of robotics.Aiming at trajectory planning for a 7-DOF space manipulator system,joint rotation trajectories are obtained from predetermined motion trajectories and poses of the end effector in Cartesian space based on the proposed generalized inverse kinematics method.A minimum norm method is employed to choose the best trajectory among available trajectories.Numerical simulations with the7-DOF manipulator show that the proposed method can achieve the planned trajectory and pose under the circumstances of minimum angular velocities.Moreover,trajectory results from the proposed kinematics model and inverse kinematics method has the advantages of simple modelling,low computation cost,easy to solve and plan trajectory conveniently.The smooth and continuous joint rotation functions obtained from the proposed method are suitable for practical engineering applications. 展开更多
关键词 redundant manipulator inverse kinematics trajectory design minimum norm method
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三水平逆耶茨序设计的低阶混杂性质
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作者 黄智赟 李智明 《应用概率统计》 CSCD 北大核心 2024年第3期452-462,共11页
在三水平正规设计中,低阶成分效应的混杂信息对选择最优设计至关重要.本文研究一类三水平逆耶茨序设计Dq(n),其中q为独立列个数,n为因子个数,得到设计Dq(n)在三种情况下低阶混杂信息的结果:(i)q<n<3q-1,n=2k,k∈N;(ii)q<n<3... 在三水平正规设计中,低阶成分效应的混杂信息对选择最优设计至关重要.本文研究一类三水平逆耶茨序设计Dq(n),其中q为独立列个数,n为因子个数,得到设计Dq(n)在三种情况下低阶混杂信息的结果:(i)q<n<3q-1,n=2k,k∈N;(ii)q<n<3q-1;n=2k+1;k∈N;(iii)3q-1≤n<(3q-1)/2.通过实例来演示上述结果. 展开更多
关键词 正规设计 逆耶茨序 别名成分数型 一般最小低阶混杂准则
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基于精准划分溢流场次的模型法计算CSO调蓄池容积及参数选取的探讨——以某南方多雨地区为例
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作者 李雨霏 《净水技术》 CAS 2024年第S02期151-159,共9页
合流制溢流(CSO)调蓄池规模的确定是海绵城市建设及合流制溢流污染治理过程中的设计工作之一,相关设计规范中也提出模型法、截流倍数法、设计暴雨法等CSO调蓄池规模的计算方法,但在工程实践过程中,由于不同计算方法设计参数选取的不同,... 合流制溢流(CSO)调蓄池规模的确定是海绵城市建设及合流制溢流污染治理过程中的设计工作之一,相关设计规范中也提出模型法、截流倍数法、设计暴雨法等CSO调蓄池规模的计算方法,但在工程实践过程中,由于不同计算方法设计参数选取的不同,得出的CSO调蓄池容积存在较大差异,同时降雨(溢流)场次及降雨(溢流)场次控制率的计算方法未明确明示,不同参数间的对应关系难以确定。文章将以某南方多雨地区为例,基于不同降雨场次划分原则,得出降雨场次控制率与设计降雨量间的对应关系;构建水力模型,得出CSO调蓄池体积与溢流场次控制率间的对应关系;将模型法和公式法进行关联,探求不同计算方法下设计参数间的相关关系,为该地区CSO调蓄池规模的参数选取提供设计依据。 展开更多
关键词 合流制溢流(CSO)调蓄池 InfoWorks ICM 溢流场次控制率 海绵城市 事件最小间隔时间(MIET) 截流倍数法 设计暴雨法
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A Dynamic Programming Approach to the Design of Composite Aircraft Wings
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作者 Prashant K. Tarun Herbert W. Corley 《American Journal of Operations Research》 2022年第5期194-207,共14页
A light and reliable aircraft has been the major goal of aircraft designers. It is imperative to design the aircraft wing skins as efficiently as possible since the wing skins comprise more than fifty percent of the s... A light and reliable aircraft has been the major goal of aircraft designers. It is imperative to design the aircraft wing skins as efficiently as possible since the wing skins comprise more than fifty percent of the structural weight of the aircraft wing. The aircraft wing skin consists of many different types of material and thickness configurations at various locations. Selecting a thickness for each location is perhaps the most significant design task. In this paper, we formulate discrete mathematical programming models to determine the optimal thicknesses for three different criteria: maximize reliability, minimize weight, and achieve a trade-off between maximizing reliability and minimizing weight. These three model formulations are generalized discrete resource-allocation problems, which lend themselves well to the dynamic programming approach. Consequently, we use the dynamic programming method to solve these model formulations. To illustrate our approach, an example is solved in which dynamic programming yields a minimum weight design as well as a trade-off curve for weight versus reliability for an aircraft wing with thirty locations (or panels) and fourteen thickness choices for each location. 展开更多
关键词 Aircraft Wing design Maximum Reliability design minimum Weight design Dynamic Programming Multiple Objective Optimization Pareto Optimality
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Design of High Efficiency DC-DC Converter for Photovoltaic Solar Home Applications
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作者 D.R. Sulaiman H.F. Ameen I.K. Said 《Journal of Energy and Power Engineering》 2010年第11期43-51,共9页
The solar energy conversion system is very interesting alternative on supplement the electric system generation, due to the persistent cost reduction of the overall system and cleaner power generation. To obtain a sta... The solar energy conversion system is very interesting alternative on supplement the electric system generation, due to the persistent cost reduction of the overall system and cleaner power generation. To obtain a stable voltage from an input supply (PV cells) that is higher and lower than the output, a high efficiency and minimum ripple DC-DC converter required in the system for residential power production. Buck-boost converters make it possible to efficiently convert a DC voltage to either a lower or higher voltages. Buck-boost converters are especially useful for PV maximum power tracking purposes, where the objective is to draw maximum possible power from solar panels at all times, regardless of the load. This paper analyzes and describes step by step the process of designing, and simulation of high efficiency low ripple voltage buck-boost DC-DC converter for the photovoltaic solar conversion system applicable to a (typical) single family home based on battery-based systems. The input voltage can typically change from (20 V) initially, down to (5 V), and provide a regulated voltage within the range of the battery (12 V). PLECS simulation results provide strong evidences about the high efficiency, minimum ripple voltage, high accuracy, and the usefulness of the system of the proposed converter when applied to either residential or solar home applications. 展开更多
关键词 Solar systems DC-DC converter design high efficiency and minimum ripple voltage Buck-Boost converter PLECSsimulation software.
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基于RBIBD的最优局部修复码构造
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作者 王静 李静辉 +1 位作者 杨佳蓉 王娥 《电子科技大学学报》 EI CAS CSCD 北大核心 2023年第3期366-371,共6页
随着数据量的迅速增长,对存储海量数据的分布式存储系统的可靠性和有效性的要求日益增加。局部修复码(LRCs)具有良好的修复局部性,能够有效实现海量数据在分布式存储系统中的可靠高效存储,构造具有(r,t)局部性的局部修复码已经成为当前... 随着数据量的迅速增长,对存储海量数据的分布式存储系统的可靠性和有效性的要求日益增加。局部修复码(LRCs)具有良好的修复局部性,能够有效实现海量数据在分布式存储系统中的可靠高效存储,构造具有(r,t)局部性的局部修复码已经成为当前研究的热点。为此,提出了一种基于可分解均衡不完全区组设计(RBIBD)的最优局部修复码的构造方法,构造信息位具有(r,t)局部性的二元最优单校验LRCs。性能分析表明,构造的LRCs达到了最小距离最优边界,且在码率上表现得更优。 展开更多
关键词 分布式存储系统 局部修复码 最小距离 均衡不完全区组设计
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Training Sequence Design for Coordination on Multiple Point System
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作者 贾国庆 陈善继 +1 位作者 纪小红 陈超 《Journal of Donghua University(English Edition)》 EI CAS 2015年第2期337-340,共4页
Although the Cramer-Rao Bound(CRB) can be used as the benchmark of estimation algorithm performance,it's too complicated for joint training sequence(TS) design for multiple input multiple output(MIMO) orthogonal f... Although the Cramer-Rao Bound(CRB) can be used as the benchmark of estimation algorithm performance,it's too complicated for joint training sequence(TS) design for multiple input multiple output(MIMO) orthogonal frequency division multiplexing(OFDM) coordination on multiple point(CoMP) systems.So a minimum mean square error(MSE) based sub-optimal sequence design criterion was proposed,including ideal sequence correlation property and sequence length constraint.The simulation results verify the theory analysis. 展开更多
关键词 multiplexing benchmark transmit criterion constraint Training Cramer verify fading antenna
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