Results 21 to 30 of about 455,906 (179)
AI foundation models in plant biology
New Phytologist, EarlyView.Foundation models decode genomes, engineer proteins, phenotype crops, and drive AI agents across plant biology. This figure was created in BioRender (BioRender.com/xcmmkel). Summary Rapid technological progress has enabled plant biologists to accumulate unprecedented volumes of multi‐scale, multi‐modal data, yet this abundance of data has intensified ...
Haopeng Yu
wiley +1 more source
Guangtongxin yanjiu, 2012 针对脊波导器件在生产、装配及使用中可能产生的变形,采用有限元法研究了错位变形和受力变形对矩形单脊波导衰减特性、功率容量和阻抗特性的影响。数值分析结果表明:随着脊波导变形程度的增大,衰减常数增大,功率容量和特性阻抗减小,其中下侧受力变形对矩形单脊波导的特性参数影响最大,因此在波导器件的使用过程中应尽量避免下侧受力变形。
陈彩红, 陈小强
doaj
Gaoya dianqi, 2020 随着泛在电力物联网的建设,电力输电线路提出了建设智慧输电线路的要求。接续管作为连接导线的重要金具,在振动,热,应力等因素的作用下会发生形变,从而影响输电线路的安全。针对导线接续管形变问题,文中对智慧输电线路接续管状态感知技术进行了研究。首先建立了电容形变模型,分析了电容极板弯曲变形引起的电容变化规律;紧接着,采用有限元方法模拟了接续管形变后的应力,确定了接续管变形值的监测范围;其次,在静电场中对不同变形量的电容进行了仿真,发现了形变量与电容值之间呈二次函数关系;最后,从感知节点 ...
赵隆 +4 more
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Coalition Breakdown and Subsystem Exit
Policy Studies Journal, EarlyView.ABSTRACT Why actors choose to work together (or not) to advance policy has been the central area of inquiry within the Advocacy Coalition Framework (ACF). Existing research has mainly emphasized the pathway towards coalition formation and evolution, underscoring the stable patterns of allies and opponents observable in policy processes over a decade or
Charlie F. Thompson
wiley +1 more source
Guangtongxin yanjiu, 2008 针对脊波导器件在使用中产生的各种变形,采用Matlab环境下的有限元PDE工具箱进行了二次编程,求得错位变形和不同受力变形时的传输特性。数值分析结果表明:错位变形使脊波导截止波长变长,单模带宽增大程度小于2%,对于脊波导传输特性影响较大的是双边受力变形,当变形达到10%时,其特性变化超过10%,在使用中应引起重视。
陈小强, 赵霞, 逯迈, 任恩恩
doaj
New Phytologist, Volume 251, Issue 3, Page 1283-1293, August 2026.Polyphenol oxidases (PPOs) depletion preserves endogenous proteins at their predicted molecular weights and enhances detectable enzymatic activities. (a) Less RbcL crosslinking in ppo mutant of Nicotiana benthamiana. Leaf extracts were incubated for 1 h, separated on protein gels, stained with Coomassie or analyzed by Western blot with the anti‐RbcL ...
Kaijie Zheng +4 more
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Shiyou jixie, 2012 基于有限元方法研究了导向钻进时导向工具的心轴产生弯曲变形对机械密封性能的影响，分析了导向钻进时心轴的最大变形状态，计算了在心轴偏转和内压作用下机械密封环端面机械变形程度，研究了密封环变形与压力之间的变化规律。计算结果表明，心轴弯曲对端面变形的影响较小，内压是端面变形的主要原因，不同压力下机械密封端面变形行为基本符合线性变化规律，确定了满足井下工具密封要求所需的介质压力。
周琴, 王瑜, 亓京波
doaj
基于Sentinel-1和Sentinel-2的像素偏移跟踪技术在强震形变监测中的比较分析
Dizhen xuebao基于像素偏移跟踪技术的影像大地测量是获取同震地表形变的有效技术之一，该方法通过影像匹配获取亚像素级的大地震二维形变场，实际应用中主要包括基于SAR的像素偏移量跟踪技术（POT）和基于光学影像的互相关技术（OIC）。当前两种方法已广泛应用于强震形变监测领域，但针对两者技术特征、精度差异及适用场景的系统比较研究仍较匮乏。为系统分析对比两种方法的应用效能，以2022年1月8日门源MW6.7地震和2019年7月美国Ridgecrest MW6.4和MW7.0地震为例，基于Sentinel-1和Sentinel ...
Luwen Wang +3 more
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, 1996 利用热模拟技术对铁基低镍电热合金的热变形行为进行了试验研究。绘制出了该合金的高温变形真应力－真应变曲线，并结合热变形后的显微组织分析了影响合金热变形行为的因素 ...
高宏, 陈其安
core
New Phytologist, Volume 251, Issue 3, Page 1267-1282, August 2026.Biosynthesis and accumulation of tanshinones in the periderm of Salvia miltiorrhiza during secondary root growth. Summary Perennial herbs develop long‐lived roots that undergo repeated cycles of secondary growth, during which the periderm functions as a protective barrier and a major site of specialized metabolite accumulation.
Licheng Liu +19 more
wiley +1 more source