Results 21 to 30 of about 3,429 (178)
基于双向DC-DC变换器的串联电池组主动均衡电路 [PDF]
, 2023 针对单体电池串联成组使用时出现不一致性的问题，提出了一种基于双向DC-DC变换器的串联电池组主动均衡电路。使用双向DC-DC变换器将单体电池中的高能量输送到能量低的单体电池中，无需额外的存储组件来存储和传送能量，减少了能量损失，提高了均衡效率。根据电池开路电压（open circuit voltage，OCV）与荷电状态（state of charge，SOC）之间近似分段线性的关系，采用以电压和SOC双变量作为均衡策略，通过相互实时修正电压均衡和SOC均衡，使得电池组间能量动态趋于一致 ...
司少康, 朱富超, 胡治国
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Optimal design of a new step-down 18-pulse autotransformer [PDF]
, 2017 Aiming at the requirement for voltage regulation with a 18-pulse autotransformer-rectifier, a novel step-down 18-pulse topology was designed and optimized based on the advantage of present topologies.
GE Hong-juan +3 more
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Journal of Advanced Nursing, Volume 76, Issue 9, Page 2266-2285, September 2020., 2020 Abstract Aims To summarize the international empirical literature to provide a comprehensive understanding of older nurses’ decision‐making surrounding the timing of their retirement. Background The global nursing shortage is increasing. Among some countries it has become an economic imperative to consider raising the state pension age and to extend ...
Marianne Markowski +2 more
wiley +1 more source
Organizational innovation: a comprehensive model for catalyzing organizational development and change in a rapidly changing world [PDF]
, 2015 Previous research has found that organizational innovations are important for organizations’ long-term competitive advantage and for technical innovations.
Alänge, Sverker, Steiber, Annika
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, 2023 大容量试验是检验电力装备性能，保障装备安全可靠运行的重要环节。现有的大容量试验回路主要依靠人工操作，存在流程复杂、效率低且易出错的问题。针对大容量试验回路智能化控制的难题，研究建立了冲击发电机单电机短路模型和双电机并联短路模型，分析了发电机短路特性，结合典型大容量试验回路设计了一键顺控方案，提出试验回路一键顺控操作流程。通过对发电机短路模型和大容量试验回路系统的仿真 ...
吴益飞 +7 more
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The collective application of shorebird tracking data to conservation
Conservation Biology, EarlyView.Abstract Addressing urgent conservation issues, such as the drastic declines of North American migratory birds, requires creative, evidence‐based, efficient, and collaborative approaches. The abundance of over 50% of monitored North American shorebird populations has declined by over 50% since 1980. To address these declines, we developed a partnership
Autumn‐Lynn Harrison +71 more
wiley +1 more source
Research on Methods of Modeling and Fault Diagnosis for Micro Direct-Current Motors [PDF]
, 2015 直流微电机以体积小、重量轻、便于控制等优点被广泛应用于生产消费领域，在微型精密仪器中尤为重要。为了保证产品出厂品质，生产过程必须对直流微电机进行100%检测。目前检测主要依靠人工的经验来判断电机的好坏，其工作量大，生产效率低，漏检现象严重，导致电机出厂质量不稳定。因此有必要寻找一种简便和可靠的直流微电机在生产线上的故障检测技术。该技术即可以对出厂前的直流微电机进行自动在线检测，以保证直流微电机的出厂合格率；又可以推广应用于其他永磁直流电机的故障检测与诊断。 通过分析空载下直流电机的动态数学模型 ...
谢志平
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New Generation High-Performance VSC-HVDC Back-to-Back Technology and Application in Project [PDF]
, 2023 [Introduction] Due to the dense load, complex grid structure, and close electrical connections in the Guangdong power grid area, there are three major problems for a long time: the risk of large-scale power outages, the interaction between AC and DC, and
Bo ZHU +5 more
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European Policy Analysis, Volume 12, Issue 1, Winter 2026.ABSTRACT Over the past decade, the concept of “instrument constituency” has been proposed as a way in which to bridge studies on policy networks and policy instruments. This concept focuses on policy networks composed of diverse actors who are brought together by the shared goal of promoting a specific instrument.
Noémie Morize
wiley +1 more source
Research on Model Reduction of Direct Drive Wind Farm Subsynchronous Oscillation Analysis Based on Alternating Direction Implicit Balanced Truncation Method [PDF]
, 2023 A reduced order model for subsynchronous oscillation analysis of direct drive wind farm was studied, and a balanced truncation method based on alternating direction implicit (ADI) was proposed.
LIU Kan, WANG Jinzhao, YAN Gangui
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