Results 11 to 20 of about 15,242 (168)
直流侧串联的多VSC-HVDC并联运行系统直流侧电压平衡控制方法
Gaoya dianqi, 2008 为提高VSC-HVDC系统传输容量,可采用直流侧串联的多VSC-HVDC并联运行系统,但需解决其直流侧电压平衡问题。笔者对其平衡控制方法进行分析,对系统存在自身参数不一致、指令功率突变、交流外部故障情况进行仿真验证。为降低器件开关频率并提高波形质量,采用了载波移相的控制方法。仿真结果证实了所提出的直流侧串联的多VSC-HVDC并联运行系统直流侧电压平衡控制以及载波移相方法用于该系统的有效性。
石新春, 周国梁, 付超
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Gaoya dianqi随着电网互联互通进程推进，各区域电网之间依靠联络线连接成一个整体，其中，多并行线路在运行过程中可能出现潮流分布不平衡现象，这一点可能威胁电力系统的安全稳定运行。针对该问题，提出了一种由电压移相器和电压调节器串联组成的电磁式潮流控制器的拓扑结构，分析其潮流调控机理，并提出一种应用于多并行线路功率平衡调节的电磁式潮流控制器控制策略。通过坐标转化将三相电力系统电路方程转化在dq坐标下，实现对调节线路的有功、无功独立控制。双线路并联仿真结果表明，所提控制策略能够良好的应用于电磁式潮流控制器 ...
杨鹏 +5 more
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Conservation Biology, EarlyView.Abstract The design of experiments to investigate the combined effects of multiple stressors requires exposing target organisms to multiple combinations of stressor doses. Concurrent manipulation of stressors is often infeasible with wildlife, but long‐lasting health effects allow individual health to be used as an integrator of prior stressor exposure.
Enrico Pirotta +24 more
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Advances in Elemene Nanodelivery Systems: From Material Design to Disease Treatment
Rare 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
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Effects of organized guarding on mortality from human–elephant conflict in northeast India
Conservation 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
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Rare 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
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International 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
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World Medical &Health Policy, Volume 17, Issue 4, Page 831-853, December 2025.ABSTRACT This article aims to sort out the meaning of the term “health nationalism,” operationalize this term and analyze this phenomenon in opposition to the cosmopolitan health policy model. Here, health nationalism is treated as a serious obstacle to access to healthcare and a cultural‐ideological barrier to equity in global public health. Two ideal
Piotr Żuk, Paweł Żuk
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Latin American Policy, Volume 16, Issue 4, December 2025.ABSTRACT In recent years, video assistant referee systems have been increasingly used to correct unfair decisions in sports. Similarly, I argue that constitutional referendums play a corrective role in hybrid or competitive authoritarian regimes, where the electoral referee is biased and the government enjoys unfair advantages.
Muhammet Derviş Mete
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The Political Empowerment of Women and Industrialization in Africa
Politics &Policy, Volume 53, Issue 6, December 2025.ABSTRACT This study examines the effect of political empowerment of women on industrialization in Africa. The results, after controlling for cross‐sectional dependence, show that women's political implication causes industrialization. The fixed effects Driscoll/Kraay standard error and the GMM estimators reveal that women's political empowerment ...
Tii N. Nchofoung +2 more
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