Results 81 to 90 of about 20,406 (144)
Dianci bileiqi, 2000 因为4/10大电流和2ms方波电流对MOA阀片的破坏特性不同,提高MOA阀片4/10大电流冲击耐受能力应与提高2ms方波耐受能力有着不同的解决思路。本文例举了提高MOA阀片4/10大电流冲击耐受能力的方法与途径,并分析了各自的利弊。
闫中华
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Risk, Hazards &Crisis in Public Policy, Volume 17, Issue 1, March 2026.ABSTRACT Hybrid crisis governance – combining hierarchical control with networked collaboration – has gained increasing attention in the public policy and crisis management literatures. Yet, the concept of hybridity remains crude and underdefined, limiting its analytical utility.
Svante Aasbjerg Thygesen +2 more
wiley +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 3, Page 376-384, March 2026.ABSTRACT Objective To investigate whether combining abnormal morphological features observed on ultrasound in live pregnancies that ended in a first‐trimester miscarriage can predict an abnormal karyotype. Methods This retrospective observational cohort study was conducted at the early‐pregnancy assessment unit at University College London Hospital ...
T. Setty +5 more
wiley +1 more source
Dianci bileiqi, 2014 针对1 000 kV特高压整柱避雷器进行了抗弯耐受试验和破坏试验,分析了设备在受弯过程中的应力、应变及弹性模量等力学性能参数变化规律,对试验过程中设备受拉侧和受压侧应变产生区别的原因和影响因素进行了剖析,验证了特高压避雷器整柱设备耐受荷载的能力;同时,通过破坏试验,得到了整柱避雷器设备的破坏模式和破坏应力,提出了在进行动态或静态力学试验时设备应力的估算依据和方法;通过数值仿真与试验结果的对比,验证了仿真模型参数取值的合理性,提出了仿真模型中材料弹性模量取值原则和范围;理论计算和试验及仿真的对比分析表明 ...
朱祝兵 +3 more
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Wildlife Letters, Volume 4, Issue 1, Page 23-31, March 2026.American badgers, a medium‐sized carnivore occurring in much of North America, are important predators in prairie landscapes though our understanding of their habitat use requirements in these areas is unclear. We used a multi‐scale approach to understand American badger habitat use at both local and landscape scales.
Colleen W. Piper +5 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2010 蜂窝状钢骨混凝土L形柱,是一种特别适用于钢结构住宅建筑的新型异形柱。为了考察该新型构件的正截面受力、变形特性,本文进行了两根等肢和不等肢L形柱的单调加载试验,研究了轴心和偏心压力作用下该新型构件的受力、变形性能与破坏形态。研究结果表明,蜂窝状钢骨能增强钢骨与混凝土间的黏结能力,提高其协同工作与整体受力性能;蜂窝状钢骨的存在,提高了该新型构件的正截面承载力;该新型构件的破坏模式与相应荷载作用下钢筋混凝土柱的破坏模式相似;在荷载不超过极限荷载的80%之前,该新型构件的截面应变符合平截面假定。
郑廷银, 苏明, 陈志军
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Functional Ecology, Volume 40, Issue 3, Page 750-763, March 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Forests worldwide are increasingly impacted by drought due to climate change, prompting plants to adapt through dehydration tolerance (DT) and avoidance (DA), two distinct physiological strategies.
Xingyun Liang +11 more
wiley +1 more source
Adaptability of Governance Structures and Processes for Sustainable Livestock in Jalisco, Mexico
Review of Policy Research, Volume 43, Issue 2, March 2026.ABSTRACT Global increases in meat production have intensified interest in alternative livestock systems that can address environmental, social, and economic challenges. Transitioning toward sustainable livestock (SL) systems requires adaptive governance arrangements that integrate local knowledge into broader policy design.
Jovanka Špirić
wiley +1 more source
Jianzhu Gangjiegou Jinzhan文中提出了一种新型波形钢-超高性能混凝土（ultra-high performance concrete， UHPC）组合桥面板结构体系，围绕该类桥面板的抗弯性能开展深入研究，为进一步探究其疲劳性能奠定基础。首先，针对该组合桥面板结构设计制作了3个试件，并对其进行了3组正弯矩作用下的足尺模型试验，探究不同剪跨长度下结构的破坏模式、承载能力、钢-UHPC层间滑移等关键力学指标的发展规律。在此基础上，建立了考虑UHPC材料非线性和钢-UHPC层间接触非线性的有限元模型 ...
刘力 +4 more
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检测β1-肾上腺素能受体自身抗体及抗体滴度对顽固性心衰患者的作用
Zhongguo shiyan zhenduanxue, 2012 目的通过检测β1-肾上腺素能受体自身抗体,以探讨β受体阻滞剂治疗顽固性心衰患者对β1-肾上腺素能受体自身抗体、抗体滴度及心功能的影响。方法随机选取120例心力衰竭NYHA分级Ⅱ-Ⅲ级患者,分为两组,A组:比索洛尔首剂1.25mg20qd,每两周逐渐加量,直至10mg20qd;B组:比索洛尔首剂1.25mg20qd,4周后逐渐加至5mgqd。比较两组β1-肾上腺素能受体自身抗体及心功能各项指标的变化。结果20A组β1-肾上腺素能受体自身抗体及滴度较B组明显降低,心功能各项指标有改善的趋势。结论通过检测β1-
马利祥 +8 more
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