Results 11 to 20 of about 128,736 (169)
, 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 ...
戴建卓 +7 more
core +1 more source
When and why to give shorebirds a head start
Conservation Biology, EarlyView.Abstract Headstarting is a translocation technique involving the hatching or rearing of wild eggs or young in captivity and the release of those individuals back to the wild at or before independence. It has been trialed as a conservation intervention for shorebirds over recent decades to improve the population trend of target populations by increasing
Lynda Donaldson +4 more
wiley +1 more source
, 2023 高超声速边界层是一个基础的科学问题。为了研究高超声速平板边界层的流场特性，结合数值模拟、理论求解和试验验证三种手段进行综合分析。数值模拟对二维Navier-Stokes (N-S)方程采用五阶精度的WENO格式离散对流项、六阶中心格式离散黏性项，时间推进项采用三阶Runge-Kutta法。理论分析利用四阶Runge-Kutta结合打靶法求解得到可压缩平板边界层层流自相似解。试验验证利用中科院力学所JF-12复现风洞测试得到大尺度平板的壁面热流，大尺度的平板模型布置传感器达到了较高的空间分辨率 ...
姜宗林, 刘美宽, 韩桂来
core
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
wiley +1 more source
Role of funders in embedding tests in conservation practice
Conservation Biology, EarlyView.Abstract Effective conservation practice requires decisions based on reliable and relevant evidence, but significant gaps in the evidence base exist. Incorporating well‐designed tests of the effectiveness of interventions for biodiversity in conservation projects is one of the best ways to scale up the rate of evidence generation.
Rebecca K. Smith +28 more
wiley +1 more source
Behavioral interventions to reduce demand for threatened freshwater turtles as pets
Conservation Biology, EarlyView.Abstract Growing demand for freshwater turtles as pets has fueled illegal trade and accelerated wild population declines, underscoring the need for theory‐based demand‐reduction interventions. We conducted a three‐part randomized controlled trial with active turtle keepers (n = 1800) in China to test conservation‐ and legality‐framed messages by ...
Wuji Zheng +9 more
wiley +1 more source
Exploring legal‐ and health‐risk messaging to reduce demand for elephant skin
Conservation Biology, EarlyView.Abstract Asian elephants (Elephas maximus) are poached for an illegal trade in their skins, which are used in traditional medicine in Africa and Asia. We explored whether messages about the legal and health risks of using elephant skin for medicinal purposes (stomach illness) could reduce such consumption.
Beilu Duan +10 more
wiley +1 more source
, 1986 疲劳研究是许多工业部门迫切需要开展的课题,但是要开展疲劳方面的研究,必须有疲劳试验设备,疲劳试验机就是最基本的设备之一。现在市场上销售的疲劳试验机,价格昂贵,一般都在十几万元至一百多万元。许多小企业和厂家都难以购买,而这些企业和厂家却有进行静力试验的材料试验机。如果将材料试验机改装为疲劳试验机,既可以充分发挥试验机的效率,又可以开展疲劳试验 ...
栗彦, 曾春华, 袁丕坚
core
International Journal of Applied Linguistics, EarlyView.ABSTRACT Although the use of AI technologies (e.g., chatbots and automated writing evaluations (AWE)) has gained considerable attention in language learning fields in recent years, how AI technologies have been designed and implemented in language learning education, as well as their effectiveness, is understudied.
Shen Qiao +2 more
wiley +1 more source
The Development and Validation of the Chinese Vocabulary Levels Test
International Journal of Applied Linguistics, EarlyView.ABSTRACT In response to the increasing need for effective Chinese vocabulary assessments, this study developed the Chinese Vocabulary Levels Test (CVLT), a test designed for intermediate‐level Chinese as a second or foreign language (CSL/FL) learners, based on the vocabulary lists (levels 4–6) from the Chinese Proficiency Grading Standards for ...
Shiwei Qi, Ailan Fu
wiley +1 more source