Results 21 to 30 of about 10,320 (116)
Shiyou jixie, 2014 综合考虑了高造斜井眼控制工具外壳和主轴的相互作用，推导出钻头偏转角和主轴变形轨迹与外壳刚度、主轴刚度及工具的结构参数相关的计算公式，建立了主轴在静态条件下的力学模型。通过模型计算得出钻头偏转角θ2=0.653 5°。利用高造斜井眼控制工具的试验台架进行试验验证，试验测得钻头偏转角θ2=0.638 9°。试验测得的数据与理论推导的数据非常接近，由此验证了所建力学模型的合理性。
冯定 +6 more
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Review of Policy Research, Volume 43, Issue 4, July 2026.ABSTRACT China's poverty alleviation campaign is significant. Over the past four decades, the number of people in China living below the international extreme‐poverty line fell by close to 800 million, accounting for nearly three‐quarters of the global reduction in extreme poverty.
Zhiqi Xu, Wil Hout
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Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Cross‐scale assembly of metal (sub) nanoparticles and/or single atoms into millimeter/nanostructured metal monolithic catalysts (Min‐SMCs) is highly appealing for sustainable water cleanup, due to energy‐efficient catalyst recyclability, high infrastructure compatibility, and low metal‐releasing risks.
Jia‐Cheng E. Yang +4 more
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Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 5, Page 613-622, May 2026.ABSTRACT Objectives To evaluate the effect of aspirin on gestational age at delivery due to preterm pre‐eclampsia (PE) in women with chronic hypertension (CH), to assess the predictive performance of the Fetal Medicine Foundation (FMF) first‐trimester competing‐risks model for preterm PE in this high‐risk group and to evaluate how parity, previous PE ...
D. L. Rolnik +23 more
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Gaoya dianqi, 2009 结合国内首套移动式静止型动态无功补偿（SVC）装置在江西电网实施的工程经验,根据现场的实际情况,分别就设备及子系统试验和系统调试验收试验两方面,详述了现场调试方法,给出了试验结果,提出了试验中的一些关键点和注意事项。文中获取的一些经验和结论可为SVC装置在我国电网中的进一步推广应用提供有益的指导和借鉴作用。
范瑞祥, 孙旻, 赵刚
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT High‐capacity SiOx/graphite (SiO/G) anodes offer great potential for advancing lithium‐ion battery technology; however, their practical application is limited by low initial coulombic efficiency (ICE) and rapid capacity decay. These challenges primarily arise from unstable phase transitions and the formation of the solid electrolyte interphase
Wan‐Xing Zhang +14 more
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Dianci bileiqi, 1988 详细分析了目前国内外采用的加速老化试验方法中存在的问题。指出试验电压与参考电压成正比的观点是错误的。文中统计了国内外氧化锌阀片的参考电压和阀片的电容,表明阀片的参考电压和电容都存在一定的分散性。加速老化试验电压应考虑电容分散性引起的试验电压升高,试品应选择不同参考电压的阀片。并提出了加速老化试验的试品选择和试验电压的推荐方法。
张雨时
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European Policy Analysis, Volume 12, Issue 1, Winter 2026.ABSTRACT What is the role of policy entrepreneurs in promoting the design of public administrative reform? We present a conceptual framework for assessing the influence of policy entrepreneurs on public administrative reform. We start by proposing a typology of the various policy entrepreneurs active in the administrative reform arena.
Nissim Cohen
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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
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