Results 111 to 120 of about 34,334 (249)
Gaoya dianqi, 2019 利用Ansys软件建立了高压开关设备用矩形槽O形密封圈模型,对该O形密封圈的变形和应力分布状况进行了数值模拟分析,研究了其工作时的受力、变形及密封效果。对该O形密封圈在不同压缩率、不同充气压力下的内应力及密封面接触应力分布进行了探讨,确定了仅考虑应力作用下O形密封圈材料容易失效的位置,并得出充气压力在1.6 MPa以下时O形密封圈没有被挤入上、下法兰间隙。
涂德华, 魏雅君, 张鑫
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Differences in mycelial turnover and persistence of wood‐decay fungi at the microscale
New Phytologist, Volume 250, Issue 1, Page 577-590, April 2026.Summary How long do fungal hyphae persist in the environment? And how does this differ between groups and species of fungi? Despite growing knowledge of fungal contributions to decomposition and soil carbon cycles, surprisingly little is known about the turnover of mycelia: What happens to fungal hyphae over time? And how this impacts different fungi's
Roos‐Marie I. J. van Bokhoven +2 more
wiley +1 more source
New Phytologist, Volume 250, Issue 2, Page 1023-1040, April 2026.Summary In plants, hypoxia sensing is controlled by the stabilization of group VII ethylene response factors (ERF‐VIIs), which are post‐translationally activated by the mitogen‐activated protein kinases (MAPKs) MPK3 and MPK6. However, how plants fine‐tune the MPK3/MPK6‐mediated phosphorylation of ERF‐VIIs to maintain cellular homeostasis remains ...
De‐Mian Zhou +9 more
wiley +1 more source
Genomic responses to increased temperature and pollinator selection in Brassica rapa L.
New Phytologist, Volume 250, Issue 2, Page 1231-1247, April 2026.Summary Rapid environmental change reshapes both abiotic stress and biotic interactions, yet it remains unclear how these combined forces structure plants' genomic adaptation. In particular, the joint influence of temperature and pollinator identity, two ecological axes undergoing simultaneous global shifts, has rarely been quantified at genomic ...
Yanqian Ding, Florian P. Schiestl
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 2011 【目的】分析64名子宫畸形患者行IVF/ICSI治疗的临床资料，对子宫畸形患者的助孕结局做出分析总结，以期为临床提供借鉴。【方法】回顾性分析2002年1月1日到2009年12月31日因不孕行IVF/ICSI治疗的子宫畸形患者，按照子宫畸形的类型进行分组，比较各组病人的基本资料及ART治疗结局。妊娠的患者追踪至分娩，比较自然流产率、早产率、活婴分娩率、新生儿体重和分娩孕周以及有无合并畸形。【结果】因子宫畸形行ART治疗患者共64人，按照子宫畸形的类型分为4组，鞍形子宫13人，不完全纵隔子宫14人 ...
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New Phytologist, Volume 250, Issue 2, Page 788-798, April 2026.Summary Generation of competent offspring is vital for the prosperity of flowering plants. The pistil not only functions as a conduit for pollen tubes to grow to the ovary but also provides a selective venue for facilitating the growth of compatible pollen tubes and discouraging invaders and incompatible pollen.
Tong Zhang +3 more
wiley +1 more source
New Phytologist, Volume 250, Issue 2, Page 762-787, April 2026.Summary B‐box (BBX) proteins were initially characterized as transcription factors connecting light signaling to the regulation of flowering time and seedling photomorphogenesis. However, over the last decade, increasing evidence has shown that they integrate light and hormone signaling, modulating multiple physiological processes during plant life. In
Bruno Silvestre Lira +3 more
wiley +1 more source
不同经济发展水平区域物流与经济增长的协整关系研究 [PDF]
根据协整检验和因果关系检验等计量方法,利用中国各省1991～2007年物流发展水平和国内生产总值的年度数据,将31个省(市、自治区)按经济密集度不同分成三大类地区,并对其物流和经济增长的关系分析进行了实证分析。实证结果表明:三个区域的物流与经济增长均存在协整关系,发达的一类地区两个变量存在双向Granger因果关系,而后两类地区两个变量仅存在单向的Granger原因。国家自然科学重点资助项目“中国城市化进程的资源环境基础研究 ...
张雷, 杨志梁, 程晓凌
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New Phytologist, Volume 250, Issue 2, Page 1313-1329, April 2026.Summary With current climate trajectories, tree populations will encounter novel selection pressures that risk local extinction if they are unable to acclimate or adapt. Within a reciprocal transplant experiment with Quercus macrocarpa L. established across a latitudinal gradient, we asked: (1) Is there genetic variation within populations?
Lucy M. S. Rea +8 more
wiley +1 more source
Gaoya dianqi, 2017 为研究长棒形瓷绝缘子电位与电场分布,以指导现有运维策略。文中采用有限元法,建立500 kV长棒形瓷绝缘子串三维模型,仿真并分析其电位和电场分布。结果表明:沿绝缘子串高度方向,长棒形瓷绝缘子串表面电位呈现三段式曲线,绝缘子串两端电位变化较快;其表面电场强度随高度变化呈U形曲线分布,场强最大值在高压端第1片伞裙与棒芯连接处。相比于普通悬式绝缘子串,长棒形瓷绝缘子串金具较少,其电位和电场分布更不均匀。
张佰庆 +5 more
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