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Functional Ecology, Volume 39, Issue 5, Page 1274-1287, May 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Interactions between plants and soil microorganisms in the rhizosphere are vital for maintaining the nutrient cycle and stability of terrestrial ecosystems. Nitrogen, closely related to carbon (C) cycling and ecosystem productivity, undergoes transformation by soil ...
Ru Wang +9 more
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Dianci bileiqi, 2016 对风电设备进行过压保护底层模块的设计,可提高风电设备的运行稳定性和可靠性,传统的风电设备过压保护模块的设计采用BP神经网络监控下的耦合控制方法,需要对各个分离元件进行分散监测,导致过压保护底层模块的稳定性不好。提出一种基于大型网络监控的风电设备过压保护底层模块设计方法。基于无线传感器构建风电设备控制器的网络监控体系结构,然后进行风电设备过压保护底层的总体设计,进行风电设备的过压保护底层模块的硬件设计,底层硬件模块分别包括了滤波器电路、动态增益控制电路和功率放大器电路以及电源模块等。通过系统设计和软件开发,
钟建坤
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Conservation Biology, Volume 39, Issue 2, April 2025.Abstract Accelerating rate of human impact and environmental change severely affects marine biodiversity and increases the urgency to implement the Convention on Biological Diversity (CBD) 30×30 plan for conserving 30% of sea areas by 2030. However, area‐based conservation targets are complex to identify in a 3‐dimensional (3D) ocean where deep‐sea ...
Laetitia Mathon +19 more
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Uncovering Xi Jinping's Policy Agenda: Text As Data Approach
The Developing Economies, Volume 63, Issue 1, Page 9-46, March 2025.How many agendas has Xi Jinping put forth and promoted since taking office in 2012, and what are the types of agendas? How much of political attention has each agenda received, and how has the allocation of attention changed over time? We utilize a dataset of presidential statements, speeches, and reports from 2012 to 2022 and employed automated text ...
Jaehwan Lim, Asei Ito, Hongyong Zhang
wiley +1 more source
Shiyou jixie, 2012 为进一步提高煤层气钻机的自动化水平，尽量减少司钻的操作，提高设备自检能力，研制了MC90Y煤层气车载专用钻机。该钻机采用电液控制方式，PLC控制器集中控制，起升和旋转系统使用比例容积泵调速，辅助系统采用恒压变量泵提供动力；起升系统采用平衡阀回路设计，实现了正载荷、负载荷和变载荷情况下的平稳运行；采用手柄方位辨识控制，降低司钻的操作复杂性，优化起升和旋转系统的运行；控制系统具有自检、监测和自锁保护等功能，提高了钻机的安全保护能力。测试及现场应用结果表明，该钻机操作便捷，可控性好，运行平稳。
纪友哲, 闵庆利, 王金宏
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Conservation Biology, Volume 39, Issue 1, February 2025.Abstract Trade restrictions are often advocated and implemented as measures to protect wild species threatened by overexploitation. However, in some instances, their efficacy has been questioned, notably by governments in the southern African (SADC) region, which tend to favor a sustainable use approach to wildlife management. We conducted a systematic
Christina Hiller +1 more
wiley +1 more source
Gaoya dianqi, 2011 介绍了主动过电压保护的概念。通过动态模拟实验研究了利用可控串补硬件bypass运行模式限制系统故障期间串补电容两端过电压、减小短路电流的作用,提出了在系统发生短路故障时,减小短路电流,保护电容器的有效控制策略。
罗虎, 曲欣, 李慧娜
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Integrative Conservation, Volume 3, Issue 4, Page 294-311, December 2024.Freshwater biodiversity in China is threatened by multiple anthropogenic factors, and while there are some reasons to suppose it may be possible to bend the curve of biodiversity loss, the variety of threats and their likely interactions with ongoing climate change provide little basis for optimism. For example, the historic overexploitation of Yangtze
David Dudgeon
wiley +1 more source
Dianci bileiqi, 2015 结合视频监控系统信号传输的特点,设计用于视频监控系统保护的电涌保护器（SPD）。主要目的是抑制来自线路故障、开关动作过电压以及在信号线路上感应到的暂态雷电过电压,从而保护后端电子通讯设备免受电涌冲击。详细介绍了SPD的设计方案,采用电源、控制、视频三合一结构,由气体放电管和瞬态抑制二极管组成两级保护电路,选用合适的退耦元件以满足多级保护的能量配合,并通过桥式电路减小电路中的分布电容。通过理论分析与试验表明,该SPD具有电涌抑制能力强,电压保护水平低,插入损耗小等特点。
王志翔 +4 more
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