Results 51 to 60 of about 25,659 (142)
Gaoya dianqi, 2014 建立了大载荷电磁线圈发射器的数学模型,结合相似原理推导了原型发射器与缩比模型各动态特性参数间的相似关系。根据实验条件确定了原型与缩比模型的相似比例系数并建立了EMCLHL缩比模型,通过仿真计算得到的结果证明了原型和缩比模型动态特性规律呈比例关系,且满足模型设计条件中各物理量的相似比例关系,相似模型条件是成立的。
王旻, 曹延杰, 邹本贵, 黄达
doaj
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
Principle of relativity and space-time transformations for inertial reference frames(相对性原理与惯性系的时空变换)
Zhejiang Daxue xuebao. Lixue ban, 2019 依据相对性原理，要求粒子动量和能量对于粒子速度的依赖关系在不同惯性系中具有相同的函数形式，由此可证明惯性系之间的时空变换必须是线性变换，并建立了线性变换系数与粒子无量纲质速关系之间的联系。由相对性原理普遍证明了相对论能量必须正比于动质量而不依赖于具体的时空变换关系。无须利用光速不变假设和相互作用守恒定律求解粒子质速关系，确定了惯性系之间时空线性变换的广义洛伦兹变换公式；证明了光速不变假设以及动量守恒和能量守恒定律实际上都不是建立相对论的必要条件。
DAIYoushan(戴又善), NIJie(倪杰)
doaj +1 more source
Use of a Cytobrush for Sampling the Ear Canal of Dogs With Otitis Externa
Veterinary Dermatology, Volume 37, Issue 2, Page 227-235, April 2026.Cytological examination of the ear canal is essential for evaluating dogs with otitis externa (OE). The conventional sampling method uses a swab. However, the cytobrush (gynaecological cervical brush), already used for cytological collection from other anatomical sites, has not been adequately investigated for this purpose in dogs with OE.
Nicoly Radaeli Atanasio +3 more
wiley +1 more source
How New Issues Become Polarized: Partisan Triggers and Subsystem Shopping in Early AI Policymaking
Policy &Internet, Volume 18, Issue 1, March 2026.ABSTRACT Early AI policymaking in the United States appeared bipartisan, but subsequent developments raise the question of whether AI policy will become more polarized over time. To examine how partisanship takes root around novel policy issues, we perform a mixed‐methods study, analyzing survey data from 129 state legislators in 44 states and ...
Robin Jacobson +2 more
wiley +1 more source
Shuitu Baochi Xuebao, 2017 以黄土丘陵区4种典型植物种群（狼牙刺、白羊草、铁杆蒿、达乌里胡枝子）为研究对象，采用野外采样、室内模拟试验与分析相结合的方法，对0—30 cm土层的各径级根系密度参数（根长密度、根体积密度、根表面积密度）与土壤理化性质、土壤分离速率间的关系进行了研究。结果表明：（1）4种植物的根系径级主要集中在0＜D≤1.0 mm之间，86%～93%的根长和46%～61%的根系表面积分布在此范围内，且根系径级越大，根系各密度参数越小；（2）4种植物各径级根密度参数对土壤理化性质（容重、有机质、团聚体）的影响各不相同 ...
葛芳红 +5 more
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Fractal analysis on protein-protein interaction networks(蛋白质互作网络的分形分析)
Zhejiang Daxue xuebao. Lixue ban, 2011 通过盒计数法，对一系列最新研究得到的蛋白质互作网络进行分形分析.研究了这些互作网络的度指数，配对系数，相关性谱等与分形性质密切相关的属性.这些分析指出，按照现有的数据构建的蛋白质互作网络很可能还不具备分形的拓扑结构.
CAOJun-jie(曹俊杰) +2 more
doaj +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2003 在长、短碳链表面活性剂总量恒定条件下制备了一系列双阳离子有机膨润土,研究了其对水中苯胺、对硝基苯酚、2,4二氯酚的吸附行为;结果表明双阳离子有机膨润土对有机物的分配系数(Kd)与有机碳含量(foc)、辛醇水分配系数(lgKow)成线性正相关,与溶解度(lgS)成线性负相关.通过数学模拟,首次描述了表面吸附和分配作用两种吸附机制的相对贡献率和改性表面活性剂配比的关系;结果表明双阳离子有机膨润土对水中有机物两种吸附机制的主导地位与有机物本身性质有关,其主导作用发生变化的拐点与长碳链表面活性剂所占比重相关.
SHENXue-you(沈学优) +2 more
doaj +1 more source
Breaking Down Social Capital: Urban Families' Use of Public Benefits
Poverty &Public Policy, Volume 18, Issue 1, March 2026.ABSTRACT This article examines whether social capital facilitates or dissuades urban families from taking up safety net programs. Using longitudinal data from the Future of Families and Child Wellbeing Study, we explore how various components of social capital—operating at relational, organizational, and neighborhood levels—are related to participation
Denia Garcia
wiley +1 more source
Fermi Surface Structure Revealed by Quantum Oscillations in Half‐Heusler Semimetal LuAuSn
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT The Fermi surface structure in the half‐Heusler semimetallic compound LuAuSn was systematically investigated using quantum oscillation studies of high‐quality single crystals and first‐principles calculations. Clear bulk quantum oscillation signals were observed for multiple complementary physical properties, including magnetization, Hall ...
Yue Lu +12 more
wiley +1 more source