Results 41 to 50 of about 660,790 (162)

The Structural Optimization of Leaf Vein Drip Irrigation Emitter on Hydraulic Performance, Energy Entropy and Anti-Clogging Ability

Agronomy
Leaf vein drip irrigation emitter is a new type of drip irrigation emitter. The flow channel achieves energy dissipation through flow diversion, turning, and sudden contraction.
Zonglei Li, Sanlin Bao, Quanjie Cheng, Qiuyue Yu, Tianyu Xu   +4 more
doaj   +1 more source

Black power print

Radical Americas, 2018
This photographic essay focuses on the cover art of a wave of black radical periodicals which emerged in the United States during the 1960s to shed light on the intersections between Black Power, graphic design and black print culture.
doaj   +2 more sources

Phytoplankton growth and succession driven by topography and hydrodynamics in seasonal ice-covered lakes

Ecological Informatics
Understanding how underwater topography affects phytoplankton succession by influencing hydrodynamics is crucial for maintaining the ecological health of lakes.
Ziyue Zhao, Yanfeng Wu, Y. Jun Xu, Yexiang Yu, Guangxin Zhang, Dehua Mao, Xuemei Liu, Changlei Dai   +7 more
doaj   +1 more source

Risk and driving factors of surface water eutrophication in the black soil region of northeast China: a study based on a novel water quality simulation method

Ecological Indicators
Excessive nitrogen and phosphorus pollution, coupled with severe climate change, has significantly intensified surface water eutrophication on a global scale.
Ziyue Zhao, Xuemei Liu, Yanfeng Wu, Peng Qi, Yexiang Yu, Jingxuan Sun, Qingsong Zhang, Guangxin Zhang, Changlei Dai   +8 more
doaj   +1 more source

High-temporal-resolution dataset of uni-, bidirectional, and dynamic electric vehicle charging profiles

Scientific Data
The transition to Electric Vehicles (EVs) introduces challenges for power grid integration, particularly due to the growing demand for charging infrastructure. To support research on smart charging strategies and bidirectional charging applications, this
Marcel Esser, Stavros Orfanoudakis, Omid Homaee, Vahid Vahidinasab, Pedro P. Vergara, Alfio Spina   +5 more
doaj   +1 more source

Fast Cut Back Thermal Power Plant Load Rejection and Black Start Field Test Analysis

Energies, 2014
Fast and reliable black start plays a key role in improving the ability of the power system to resist the risk of large-scale blackouts. For a black start with high voltage and long-distance transmission lines, it is much easier to cause phenomena such ...
Kaiwen Zeng, Jinyu Wen, Longpeng Ma, Shijie Cheng, En Lu, Ning Wang   +5 more
doaj   +1 more source

‘The Radical Black Colour’. On the Semantics of the Black Colour in Anarchist Discourse

Слово.ру: балтийский акцент, 2017
The subject of this paper is the semantics of the colour black in anarchism. The author analyses the sociocultural and ontological aspects of the colour black as a symbol of anarchist criticism of power and the state.
Martynov M.
doaj   +1 more source

Two-Stage Black-Start Optimization for Power Systems with Multi-Energy Microgrid as a Black-Start Unit

Shanghai Jiaotong Daxue xuebao
To reduce the losses caused by major power outages in power systems, a two-stage optimization method for black start of power systems is proposed using a multi-energy microgrid (MEMG) as a black-start source.
ZHU Yongqing, CHEN Changming, LI Qingsheng, LI Zhen, ZHANG Zhaofeng, LIN Zhenzhi
doaj   +1 more source

Black Religion and Black Power: The Nation of Islam’s Internationalism

Genealogy, 2019
The Nation of Islam’s influence has extended beyond the United States. This Black American Muslim movement has used the intersection of race and religion to construct a blueprint of liberation that has bonded people of African descent throughout ...
Bayyinah S. Jeffries
doaj   +1 more source

Startup Method and Strategy for Bipolar LCC-HVDC System Used as Black-Start Power Source

Zhongguo dianli
The scientific and reasonable black-start scheme is the most effective measure to cope with the power grid blackout, which can greatly accelerate the system recovery process, thus significantly reducing the losses of power system due to power failure ...
Qingwei WANG, Zhibin LIU, Bingqi CHEN, Jikeng LIN   +3 more
doaj   +1 more source