Results 11 to 20 of about 10,465 (119)
Gaoya dianqi, 2021 电负性优异是SF6具有良好绝缘性能的重要因素之一,为分析SF6基态分子结构与电负性的变化,首先采用密度泛函理论（DFT）/B3LYP方法在6-311G基组下优化SF6基态分子结构,得到了分子在外电场作用下基态分子键长、键角、总能量、分子前线轨道能量和Mulliken电布居数等基态分子结构信息,其次采用Mulliken标度对SF6的电负性进行了计算。分析结果显示电场作用下,SF6分子键长、键角度发生了变化,分子的总能量绝对值逐渐增加,分子最高占据轨道和最低未占据轨道能量逐渐增加 ...
李亚莎 +4 more
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The configurational transition of polyelectrolyte chain confined in a cylinder(聚电解质链在柱状受限下的构象转变)
Zhejiang Daxue xuebao. Lixue ban, 2023 采用粗粒化分子动力学模拟方法，研究了受限于圆柱体内的聚电解质链的构象行为。通过计算链平均回旋半径、平均持久长度和平均形状因子等物理量，重点探究反离子价态、链刚性和受限孔径等对聚电解质链尺寸和构象转变的影响。结果表明，受限聚电解质链可形成稳定的棒状、球状、折叠链状和环状结构。尤其在三价反离子诱导下，半刚性聚电解质链可形成稳定的环状结构，并由切向相关函数表征。通过统计反离子分布，进一步探讨了聚电解质链和离子凝结的机制。同时讨论了环的成核和生长动力学特征 ...
高菊先(GAO Juxian) +2 more
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Dianci bileiqi, 2023 利用三维雷暴云动力—电耦合数值模式，通过对青海东北部地区2011年7月29日一次雷暴发展过程进行研究模拟，分析了青海东北部地区雷暴的电荷结构演变特征并从微物理方面讨论了其过程主要形成原因。结果表明，对流过程中霰粒子比含水量分布广，雹粒子比较少，以液态降水为主。青海地区雷暴以三极性结构为主，在上升气流比较弱时电荷结构呈现出下正中负的电荷结构，结构整体电荷密度分布较低，底部正电荷区与负电荷区深厚，霰粒子在下荷正电，冰晶在上荷正电。随着上升气流增大 ...
蔡彬彬 +6 more
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Insights for conservation from the Ecological Knowledge Games project
Conservation Biology, EarlyView.Abstract Environmental conservation research requires robust methods for collecting large‐scale behavioral data and engaging diverse stakeholders in decision‐making processes. We (Y.P., A.B.D., and N.B.) created EcoKnowGames (Ecological Knowledge Games), a transdisciplinary project that develops knowledge games for conservation science and data ...
Yuan Pan +4 more
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Resource Substitution: Local Governments' Issue Attention and Policy Reinvention
Policy Studies Journal, EarlyView.ABSTRACT Research on policy reinvention, where a government modifies rather than replicates policy innovations introduced by other governments, has progressed significantly, but how it is influenced by the government's issue attention has not been thoroughly examined.
Yingxin Zhang, Yixue Yao, Kaifeng Yang
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Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT This study developed a metal–modified fluoroethylene vinyl ether (FEVE) organic coating on 6061 aluminum alloy, supported by a micro‐arc oxidation (MAO) pretreatment layer, to enhance corrosion resistance and antifouling performance in marine environments.
Chang Liu +5 more
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Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Because of superior transportability and high energy capacity, methanol is regarded as a potential hydrogen carrier. Photocatalytic methanol dehydrogenation offers a sustainable and cost‐effective method for releasing hydrogen. Conventional photocatalysts face challenging obstacles, including the low catalytic efficiency and rapid ...
Rundong Chen +9 more
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Dianci bileiqi, 2021 微观结构的研究是ZnO非线性压敏电阻制造行业的最基本的研究内容之一。笔者梳理了该领域的最新研究进展。共分2个方面:1) ZnO压敏电阻晶界微观精细物理结构的研究; 2) ZnO压敏电阻晶界电子结构的研究。随着电子显微技术与其他现代发展起来的测试方法相结合,必将有力的推动ZnO非线性压敏电阻微观结构的研究发展,实现该领域的重大突破,有力地促进ZnO非线性压敏电阻制造技术的快速提升。
汤霖
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Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT In electrocatalysis, traditional single‐atom catalysts (SACs) face challenges in achieving coordinated control of reaction pathways due to limitations such as single local energy levels and carrier recombination. By introducing an additional defect structure, it is possible to break the electronic structure symmetry, thereby activating SACs ...
Juanjuan Huo +8 more
wiley +1 more source
四川大学学报. 自然科学版, 1998 利用２ＭＶ电子静电加速器，研究了热氧化工艺与ＳｉＯ２ Ｓｉ结构的电子辐射效应和辐射损伤机制．结果表明，高能电子辐照ＳｉＯ２ Ｓｉ结构引起的ＭＯＳ电容平带电压漂移ΔＶｆｂ与ＳｉＯ２膜厚ｄ２ｏｘ成正比．由Ｐ型硅为衬底或掺氯氧化的ＳｉＯ２ Ｓｉ结构对电子辐射较敏感；而由磷处理或干Ｎ２热退火的ＳｉＯ２ Ｓｉ结构能有效地降低对电子辐射的敏感性．
谢茂浓
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