Results 21 to 30 of about 72,640 (167)
四川大学学报. 自然科学版, 1998 指出了直接和间接锁相调频的缺点，提出了改进措施．采用锁相两点调频，对锁相两点调频的跟踪性能进行了分析．分析表明：锁相两点调频可以扩展调频器的下限调制频率 ...
杨平先
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Politics &Policy, Volume 54, Issue 4, August 2026.ABSTRACT After 2013, the number of statewide minimum wage increases in the United States surged. However, not every state followed the trend. Some refrained from minimum wage legislation completely. This article examines the causes of differences in state minimum wage policies from 2013 to 2022, taking a qualitative perspective on minimum wage politics
Emanuel Schuller
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Justice in coexistence: Pastoralism and large carnivores on the Qinghai‐Tibet Plateau
People and Nature, Volume 8, Issue 7, Page 2186-2199, July 2026.Abstract The conflict between livestock husbandry and large carnivore conservation presents significant challenges in grassland ecosystems worldwide. Achieving sustainable coexistence among herders, livestock and large carnivores requires reconciling diverse perspectives and interests through equitable, inclusive and fair processes that address both ...
Yufang Gao, Yue Yu
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Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT The composition and structural characteristics of metacomposites are crucial for tuning their negative electromagnetic parameters; however, the lack of a clear structure–property relationship severely limits their application in dielectric and magnetic fields.
Chunyuan Deng +9 more
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Journal of Animal Ecology, Volume 95, Issue 7, Page 1178-1193, July 2026.This population‐comparative study reveals that male and female parents respond differently to social and ecological conditions. This sex‐specific responsive strategy is related to the incongruent parental care systems across populations in Chinese penduline tits.
Jia Zheng +5 more
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Too Difficult to Report? User Experiences With DSA and Community Guideline Reporting on Social Media
Policy &Internet, Volume 18, Issue 2, June 2026.ABSTRACT User reporting of norm‐violating content on social media is a crucial component of platform governance. While prior research has explored the motivations behind reporting—often drawing on the Bystander Intervention Model—less attention has been paid to how users navigate the processes involved.
Ursula K. Schmid +2 more
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Gaoya dianqi, 2023 电池储能系统被认为是解决可再生能源的不确定性和不平衡性导致的功率不足和频率波动的有效途径。基于此，文中提出了一种基于电池的荷电状态SOC(state of charge)的电池储能系统混合控制策略。首先，文中将电池的SOC、调频和调峰需求划分为不同的区域，并对调频和调峰提出相应的控制策略，提出SOC自恢复控制策略。之后提出储能的混合控制策略，基于电池储能的SOC，将储能的调频与调峰功能与SOC自恢复策略相结合，实现储能对电力系统的优化。最后通过仿真分析验证该控制策略的合理性与应对可再生能源波动的能力。
李盈 +9 more
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Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT To address the demand for high‐temperature stability, broadband strong absorption, and multifunctional integration of electromagnetic wave absorbing materials in complex service environments, lightweight molybdenum disulfide (MoS2) decorated silicon carbide (SiC) nanofiber composite aerogels with a directional layered interconnected structure ...
Zhi Song +4 more
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Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT The development of lightweight, high‐attenuation, and broadband carbon‐based electromagnetic wave absorbers is hindered by the intrinsic trade‐off between impedance matching and dielectric dissipation. Herein, we report a facile and scalable synthesis of N‐doped lignin‐derived interconnected porous carbon (Nx‐LIPC) via hydrogen‐bond self ...
Bin‐Peng Zhang +7 more
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Gaoya dianqi, 2008 由于生产过程中系统烟气量波动较频繁,且波动范围较大,为达到调节准确、减小对电网的冲击、节省能源的目的,在SO2风机中采用了高压变频调速技术。从3个方面论述了变频调速的技术方案的优缺点,从高压变频调速系统的工作原理、系统结构、控制系统组成等方面阐述了高压变频器的技术特点,从而论证了高压变频器在使用中的优越性及显著的节电效果。
熊品华
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