Results 11 to 20 of about 2,351,627 (156)
野生动物学报, 2023 为了解蓝孔雀（Pavo cristatus）肠道菌群中整合子及其基因盒的分布特征，以2个动物园蓝孔雀粪便为材料，采用CTAB法提取肠道菌群宏基因组DNA，共计139份；通过PCR法扩增整合子、基因盒，选取部分PCR产物测序。结果显示：整合子intI1、intI2和intI3检出率分别为86.33%、69.78%和11.51%；不同大小的基因盒条带有 18种，共51种组合模式。研究表明蓝孔雀种群中整合子流行性较高，且Ⅰ类整合子携带的基因盒具有高度异质性，反映了蓝孔雀种群潜在多重耐药的复杂性 ...
陶芬 +7 more
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香川県伊吹島における出部屋の存続と閉鎖のメカニズム――社会および共同体の変化に関連づけて―― [PDF]
, 2015 京都大学0048新制・課程博士博士(人間・環境学)甲第19074号人博第727号新制||人||174(附属図書館)26||人博||727(吉田南総合図書館)32025京都大学大学院人間・環境学研究科共生人間学専攻(主査)教授 小山 静子, 教授 田邊 玲子, 教授 落合 恵美子学位規則第4条第1項該当Doctor of Human and Environmental StudiesKyoto ...
伏見, 裕子
core +1 more source
, 2013 整合素是一类介导细胞-细胞、细胞-胞外基质以及细胞-病原体间粘附和信息传递的粘附分子,在炎症反应和肿瘤转移等许多病理生理过程中起着重要的作用。β2整合素是整合素的一个亚族,主要参与白细胞与内皮细胞、免疫细胞或者靶细胞间的粘附;细胞间粘附分子-1(ICAM-1)是β2整合素一种重要的配体 ...
吕守芹 +4 more
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Gaoya dianqi, 2022 复合绝缘子运行中异常发热现象频发，其中老化与表面污秽是导致发热的主要原因。文中采用有限元多物理场仿真，结合实测获得的材料参数，分别建立了正常运行、湿热老化、局部涂污及整体涂污等4种典型工况下的复合绝缘子仿真模型，根据湿热老化以及表面污秽的不同发热特征，分别建立静电、电流场两种模型。通过电场计算分析发现：湿热老化后复合绝缘子沿面电场增大、界面电场降低；局部涂污复合绝缘子在涂污处电场稍微下降；整体涂污复合绝缘子由于沿面电流增大造成电场畸变严重。通过以电介质损耗为接口的耦合热场以及电流场 ...
刘宇 +5 more
doaj
Subspecies taxonomy reflects social and geographic patterns of taxonomic effort in tetrapods
Conservation Biology, EarlyView.Abstract Subspecies have been used in conservation biology to account for intraspecific patterns in genetic diversity, which is crucial to long‐term population viability. Although over 3200 subspecies are currently assessed by the International Union for Conservation of Nature Red List, their biological relevance remains controversial.
Jhonny J. M. Guedes +3 more
wiley +1 more source
全球能源互联网, 2018 针对大规模梯次利用电池组建模过程中电池参数获取难的问题，在锂离子电池Thevenin模型的基础上，利用递推最小二乘法在线对电池参数进行辨识。搭建串联锂离子电池组组合模型和整体模型，验证了在动态应力测试工况下在线参数辨识的准确性，组合模型端电压仿真精度在0.5%以内，整体模型的端电压仿真精度在0.2%以内。结合储能电池典型工况，利用整体模型，在恒流下添加白噪声作为激励，验证了在线辨识参数的可行性，其相对误差在0.8%以内。为大规模梯次利用电池组的建模仿真提供了研究基础。
董喜乐, 张彩萍, 姜久春
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International Journal of Applied Linguistics, EarlyView.ABSTRACT Collaborative writing has attracted increasing attention in English as a Foreign Language (EFL) instruction due to its potential to enhance learners’ writing competence. However, few studies have examined the comparative effects of collaborative versus independent writing on EFL learners’ individual performance, especially in higher‐order ...
Ting Huang, Chenze Wu, Wenkang Zhang
wiley +1 more source
Energy of bound polarons in parabolic quantum wells(量子阱中的束缚极化子的路径积分变分研究)
Zhejiang Daxue xuebao. Lixue ban, 2002 利用Feynman路径积分变分方法,推导了整个电声子耦合区域的量子阱中束缚极化子的基态能.对其数值结果研究表明:当量子阱的约束势达到一定值,极化子的基态能修正-ΔE随电声子耦合常数α的增加激剧增大,约束势导致有效电声子耦合从无约束势时的弱耦合向居间耦合或强耦合渡越.更重要的是,我们发现存在一个量子阱的临界有效宽度lZ0,当lZ小于临界值时,-ΔE随lZ变小很快增大;当lZ大于临界值时,随lZ变大,-ΔE几乎不变.
RUANYong-hong(阮永红)
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International Journal of Applied Linguistics, EarlyView.ABSTRACT Second/foreign language (L2) learning is not solely a cognitive/linguistic acquisition process but includes mixed emotional experiences. Understanding how these emotional experiences relate to resilience could help our understanding of how learners navigate fluctuations in emotions when learning an L2.
Xinjie Chen +5 more
wiley +1 more source
Compliance in Regulatory Gray Areas: The Case of the Organic Seed Standard
Policy Studies Journal, EarlyView.ABSTRACT Adaptive regulations, designed to balance flexibility with accountability, can embed provisions that unintentionally leave room for firms to shirk on their responsibilities by exploiting flexibility. We call these provisions “regulatory gray areas,” and ask: how should we understand (non‐)compliance in adaptive regulatory settings?
Liza Wood +3 more
wiley +1 more source