Results 31 to 40 of about 15,396 (127)

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

四轴飞行器—倒立摆系统的控制算法研究

open access: yes智能科学与技术学报, 2019
四轴飞行器控制活动杆件或装水酒杯平衡是一项难度系数极大的任务,所构成的模型称为四轴飞行器—倒立摆不倒平衡控制系统。基于这种特殊形式的倒立摆不倒平衡控制模型,在X-Z平面简化为线性不倒模型进行分析,建立其动力学模型,并结合滑模控制的算法,设计系统的控制器并进行仿真实验。利用滑模控制算法对四轴飞行器—倒立摆不倒平衡控制系统进行控制,实验结果表明,其表现出了优异的不倒稳定性。
孔凡国   +4 more
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

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

MMC变流器的无差拍电流预测控制器研究与设计

open access: yesGaoya dianqi, 2023
为了提高模块化多电平变流器MMC(modular multilevel converter)的稳定性与动态性能,实现环流抑制,提出基于交流电流和环流双目标调节的无差拍控制。通过MMC单相等效电路的动态方程,设计MMC交流电流分量以及环流分量的无差拍电流预测控制器,并针对实际控制存在的时延问题进行理论分析提出改进措施。通过搭建无差拍控制下模块化多电平变流器的十电平Simulink仿真模型,验证控制策略的有效性。结果表明:通过无差拍控制可以显著提高模块化多电平变流器的稳态和动态性能 ...
赵峰   +5 more
doaj  

Effects of organized guarding on mortality from human–elephant conflict in northeast India

open access: yesConservation Biology, Volume 40, Issue 1, February 2026.
Abstract Human–elephant conflict (HEC) frequently results in human and elephant mortality, posing major social justice and conservation concerns across Asia and Africa. Although a variety of interventions have been introduced to mitigate HEC, rigorous evaluations of how they affect mortality are practically nonexistent.
Nitin Sekar   +6 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  

Multi‐Scale Rational Design and Synergistic Strategies of Nanozymes for Targeting Drug‐Resistant Pathogens

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT The escalating issue of drug‐resistant pathogens, largely driven by the overuse of conventional antibiotics, has become a significant global health threat. Developing alternative therapeutic strategies and fabricating natural biological enzyme materials that mimic the high efficiency, selectivity, and mild‐operating conditions of natural ...
Shuai He   +11 more
wiley   +1 more source

CHINA’S LAND FINANCE AS ACTIVE MODE OF LAND DEVELOPMENT AND INFRASTRUCTURE DELIVERY: Reality, History and Prospects

open access: yesInternational Journal of Urban and Regional Research, Volume 50, Issue 1, Page 191-220, January 2026.
Abstract Henry George advocated for capturing land value increases for public ends. The active approach of public authorities organizing and financing land development can help capture higher land value increases, as Hartman and Spit indicate. However, this approach hardly happens in developing countries, where the coalition of private developers and ...
Nannan Xu
wiley   +1 more source

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