Results 1 to 10 of about 15,882 (120)

A Review on Cracking in Laser Additive Manufacturing of Nickel‐Based Superalloys: Types, Formation Mechanisms, and Suppression Strategies

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT Nickel‐based superalloys (Ni‐based superalloys) have attracted extensive attention in laser additive manufacturing (LAM) due to their capability to directly fabricate complex and high‐performance structural components. However, the rapid melting and solidification inherent to LAM result in intense thermal cycling, which induces high residual ...
Tianxiang Lin   +9 more
wiley   +1 more source

Tailoring Differentiated Multiscale Microstructure to Enhance the Mechanical Properties of Additively Manufactured AlCoFeNi2 at Room and High Temperatures via Annealing

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT Additively manufactured AlCoFeNi series eutectic high‐entropy alloys (EHEAs) exhibit nonequilibrium dual‐phase microstructure in the as‐printed state, allowing them to be easily tailored through annealing to explore their strength–toughness potential.
Huidong Wu   +13 more
wiley   +1 more source

基于双PI+重复控制的光伏逆变器谐波抑制策略 [PDF]

open access: yes全球能源互联网, 2018
针对光伏逆变器并网电流谐波较大的问题,首先对三电平逆变器的主电路结构进行了分析,得出了网侧输出电流的数学模型,并分析了该模型下逆变器谐波产生的机理。在分析了传统的PI+重复控制的基础上,针对传统PI与重复控制相互耦合容易导致等效重复控制对象不稳定的问题,提出了一种双PI+重复控制(double proportional integral + repetitive control,DPI+RC)的控制策略。采用PI补偿,在保证了传统PI+重复控制系统跟踪的快速性和准确性前提下,确保了系统的稳定性。最后 ...
刘重洋   +4 more
doaj   +1 more source

Synergistic Regulation of Na+ Solvation Structure and Interfacial Chemistry Enabled by a Bifunctional Sultone Additive for High‐Voltage Sodium Metal Batteries

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT Sodium metal batteries (SMBs) are regarded as promising candidates for next‐generation energy storage systems owing to their high theoretical energy density and low cost. However, their practical development is hindered by the instability of the electrode–electrolyte interphase (EEI), particularly under high‐voltage operation.
Xingyu Yang   +10 more
wiley   +1 more source

平行交通:虚实互动的智能交通管理与控制

open access: yes智能科学与技术学报, 2019
概述了平行交通系统的概念、框架、方法与应用。平行交通系统能够针对具体任务和特定场景构建对应的软件定义的人工交通系统,在此基础上,利用计算实验方法进行实验、分析、评估、预测、学习与优化,并借助平行执行实现对实际交通系统的管理与控制,实现虚实互动的平行智能。平行交通管理与控制是ACP理论的拓展应用,主要强调虚实互动的平行智能产生方式在城市交通管理与控制中的应用,以提高城市交通管理与控制的智能化水平。
吕宜生   +5 more
doaj  

Comparative Evaluation of Chemical and Physical Expansive Agents in Cemented Paste Backfill: Expansion Behavior, Mechanical Response, and Microstructural Mechanisms

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT This study presents an assessment of four representative expansive additives—calcium sulphoaluminate–calcium oxide, magnesium oxide, sodium lauryl sulfate, and sodium abietate—and their effects on the expansion behavior, mechanical development, and microstructural characteristics of cemented paste backfill (CPB).
Lijie Guo   +5 more
wiley   +1 more source

单级倒立摆系统的仿真研究

open access: yes四川大学学报. 自然科学版, 2007
对单级倒立摆系统的平衡控制问题进行了研究.首先建立了系统的数学模型,然后分别采用PID方法、最优控制策略的LQR方法和极点配置方法设计控制器,最后对控制系统进行了仿真实验研究.仿真实验结果不仅证明了三种方案对系统平衡控制的有效性,同时也展示了它们的控制品质和特性.
徐国林, 杨世勇
doaj  

Advances in Elemene Nanodelivery Systems: From Material Design to Disease Treatment

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT Elemene (ELE) is a bioactive sesquiterpenoid extracted from traditional Chinese herbs, demonstrating broad‐spectrum antitumor, anti‐inflammatory, and analgesic properties with significant therapeutic potential. However, its clinical utility is constrained by inherent physicochemical limitations, including volatility and hydrophobicity, which ...
Xiao Wang   +9 more
wiley   +1 more source

基于三相四桥臂的双模式变流器控制策略研究

open access: yesGaoya dianqi, 2016
针对微网系统在离网模式下,给不平衡负荷供电之一问题,文中采用三相四桥臂作为双模式变流器拓扑,并设计了并网与离网双模式工作及并离网模式切换的控制策略,可解决离网模式下不平衡负载引起的电压不平衡问题。根据不同模式下三相四桥臂变流器的数学模型,采用电网电压定向的电感电流闭环控制策略实现并网模式运行,采用双同步旋转坐标系下的正负序电压控制以及零序电压的比例谐振控制策略实现离网模式运行。同时,采用一种控制模式的平滑切换方法来实现并网与离网两种模式的独立运行。最后,通过仿真对采用的双模式变流器控制策略进行了验证 ...
陶艳
doaj  

One‐Sidedness and the Inferior Function in Coriolanus and Timon of Athens

open access: yesJournal of Analytical Psychology, Volume 71, Issue 1, Page 8-34, February 2026.
Abstract For both Jung and Shakespeare, one‐sidedness is the fundamental tragic trait. Jung proposed that as an individual develops, they inevitably associate their identity with certain modes of perception and interaction, and that this leads to psychological polarization.
Sofie Qwarnström
wiley   +1 more source

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