Results 31 to 40 of about 13,423 (121)
Shiyou jixie, 2015 为了对新服役和维修后再役的水下采油树进行性能测试，对水下采油树系统结构和工作原理进行了研究，参照API相关标准及水下采油树工厂验收测试步骤，结合流花11-1油田水下采油树的特点，制定了一套水下采油树测试方法和流程。水下采油树测试项目包括：水下采油树本体测试、密封轴套测试、油管挂测试、采油树帽测试及采油树系统功能联合测试。测试过程中判断保压效果的标准是没有明显的泄漏，且在规定的保压时间内压降不应超过初始压力的3%。该测试方法的制定对于解决国内油田水下采油树的检测维修问题具有重要的现实意义 ...
袁晓兵 +6 more
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Seasonality of temperature dependence of methane fluxes from natural wetlands
Functional Ecology, Volume 39, Issue 9, Page 2383-2397, September 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Temperature dependence is a crucial parameter in estimating methane (CH4) fluxes from natural wetlands, yet our understanding of this parameter remains inadequate. Seasonal fluctuations in water levels and ecosystem productivity lead to seasonal differences in CH4 ...
Jinshuai Li +6 more
wiley +1 more source
Opportunities, research gaps, and risks in allogenic ecosystem engineer mimicry
Conservation Biology, Volume 39, Issue 4, August 2025.Abstract In an age of anthropogenically driven species loss and increasingly novel ecosystems, ecosystem engineer restoration is a process‐based approach to supporting ecosystem function. Many ecosystem engineers have low or declining population sizes.
Brandi Goss +2 more
wiley +1 more source
Functional Ecology, Volume 39, Issue 6, Page 1550-1566, June 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Forests store substantial amounts of soil organic carbon (SOC), but SOC stocks differ strongly between forest ecosystems dominated by arbuscular mycorrhizal (AM) or ectomycorrhizal (EcM) fungi.
Mengxu Zhang +10 more
wiley +1 more source
Assessing Closed Hydroponic Subsystems for Batavia Lettuce Growth Under Different Planting Densities
World Water Policy, Volume 11, Issue 2, Page 427-438, May 2025.ABSTRACT Hydroponic systems have the potential to be sustainable and alternative methods for food production that confer advantages of high production and better control of growth. However, only a few studies have focused on leafy vegetable growth in different subsystems and environmental variables.
Demet Çekin +6 more
wiley +1 more source
天广直流逆变侧直流电压测量偏低故障时直流系统响应特性仿真研究
Gaoya dianqi, 2016 近期天广直流多次发生因逆变侧直流电压测量偏低故障导致直流系统电压异常升高的事件。为了研究这一事件的产生机理,结合控制策略对天广直流系统电压异常升高的原因进行了详细分析,并通过大量RTDS仿真试验,研究了在不同故障程度、功率水平、运行方式下发生逆变侧直流电压测量偏低故障时直流系统的过压水平和控制保护响应特性。仿真结果表明,逆变侧直流电压测量偏低会造成直流系统过压,且直流系统在不同的故障程度、功率水平和运行方式下有不同的控制保护特性,特别是在大功率模式和降压运行方式下可降低直流过压水平。
郑永武, 黄修作
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Shuitu Baochi Xuebao, 2022 通过评价多种生态系统总初级生产力(gross primary productivity,GPP)和蒸散(evapotranspiration,ET)遥感数据产品,构建了适用于我国秦岭区域的GPP和ET组合数据集,并计算分析了秦岭区域生态系统水分利用效率(water use efficiency,WUE)的时空变化规律。结果表明:不同产品对于不同植被类型GPP和ET的估算效果差异较大,其中VPM GPP和RF GPP这2种GPP产品,China ET和PML-V2 ET这2种ET产品的总体表现较好 ...
黄卓 +7 more
doaj
China's Eco‐Civilisation, Climate Leviathan, and Hobbesian Energy Transition
Antipode, Volume 57, Issue 3, Page 830-861, May 2025.Abstract Scholars have hitherto tended to theorise China's ecological civilisation project either as a form of environmental authoritarianism or as a vision of eco‐socialism. This paper contributes to the conversation by conducting a textual analysis of Chinese scholarly discussions on eco‐civilisation.
David Chen
wiley +1 more source
Combating infections under siege: Healthcare challenges amidst the military assault in Gaza
World Medical &Health Policy, Volume 17, Issue 1, Page 188-213, March 2025.Abstract The ongoing Israeli military assault on Gaza has caused a devastating collapse of healthcare infrastructure, resulting in an unprecedented surge in infectious diseases. The destruction of sanitation systems, restrictions on medical supplies, and displacement of civilians have created an environment conducive to the rapid spread of waterborne ...
Bilal Irfan +24 more
wiley +1 more source