Results 1 to 10 of about 8,161 (117)
Zhejiang Daxue xuebao. Lixue ban, 2022 给出了独立随机环境中受传染性疾病影响的分枝过程{Zn，n∈N}的模型，讨论了该模型的极限性质，并给出了分枝过程经{Sn，n∈N}和{Un，n∈N}规范化后和几乎处处收敛和L1收敛的充分条件，得到L2收敛的充分条件和极限非退化到0的充分条件和必要条件。
RENMin(任敏)
doaj +1 more source
Transitivity of a finite group on the conjugates of some minimal subgroups(有限群在某个极小子群共轭类上的传递性)
Zhejiang Daxue xuebao. Lixue ban, 2004 有限群在某个极小子群共轭类上的某种传递性影响或决定群的构造.运用抽象群和置换群的理论得到:(1)如果有限群G共轭作用在它的所有极小子群上传递,G一定是循环p-群或广义四元数群;(2)如果有限群G在它的某个极小子群共轭类上二重传递,G是某些特殊的群的扩张;(3)如果有限群G是一个几乎单群,G在某个极小子群共轭类上二重传递,G的Socle一定是以下子群之一:PSL(2,p),PSU(3,p2),PSL(2,8).
DINGShi-feng(丁士锋)
doaj +1 more source
Jianzhu Gangjiegou Jinzhan, 2023 为研究钢管混凝土加劲环管板节点在轴向拉力作用下的受力性能，开展了3个节点试件的单调加载试验，分别得到了管板节点加强前后的荷载-位移曲线和破坏模式。试验结果表明：SPR节点在单调荷载作用下主管和加劲环发生局部屈曲，表现为延性破坏；CFT节点在荷载作用下主管壁发生剪切破坏，荷载-位移曲线没有明显的屈服段，表现为脆性破坏；CFTR节点在荷载作用下，连接板处加劲环发生剪切破坏，同时加劲环局部V形屈曲；加劲环能够明显提高管板节点的承载力，同时改善节点的塑性性能；相较于主管外设加劲环 ...
王宇航, 王光钊, 周绪红, 王康
doaj
Alloy‐Type Anode Materials for Sodium‐Ion Batteries: From Single Metals to MultiComponent Alloys
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Sodium‐ion batteries (SIBs) are widely regarded as a promising alternative to lithium‐ion batteries due to their abundant sodium resources, broad geographical distribution, and low cost, rendering them particularly attractive for large‐scale energy storage applications.
Zicheng Yin +12 more
wiley +1 more source
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Metal nanoclusters provide abundant catalytically active sites and unique electronic structures that are highly beneficial for enhancing photocatalytic performance; however, their practical application is often hindered by poor photostability.
Yiying Qin +6 more
wiley +1 more source
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Conventional lithium‐ion battery cathodes predominantly rely on reversible lithium intercalation in bulk, which inevitably induces phase transitions, transition metal migration, and voltage decay. Electrolytic anion adsorption pseudocapacitance provides a chance for bypassing these issues via a surface‐dominated reaction, especially in ...
Hongjin Ren +10 more
wiley +1 more source
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Lithium–sulfur (Li–S) batteries are promising for next‐generation high‐energy‐storage systems but are hindered by polysulfide shuttle, sluggish kinetics, and volume expansion. Conventional carbon hosts struggle to simultaneously anchor and convert polysulfides efficiently.
Ling Chen, Peng Xu, Jiaojing Shao
wiley +1 more source
He jishu针对一款采用环栅加固方法自主设计研制的BCD（Bipolar-CMOS-DMOS）工艺光电编码器控制电路，开展了电离总剂量（Total Ionizing Dose，TID）辐射效应研究。为揭示编码器辐射损伤机理，设计编码器总体电路及电路中的不同模块，通过对总体电路与模块电路的测试，比较电路各部分输出参数受总剂量辐照的影响规律。结果表明，辐照中编码器电路分模块出现不同程度的输出特性退化，但总体输出在总剂量5 Mrad（Si）范围内依旧保持稳定。结合仿真的方法 ...
许 世萍 +9 more
doaj +1 more source
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Li–O2 batteries garner widespread attention owing to their remarkable theoretical specific capacity. Nevertheless, the feasible implementation of the system is hindered by sluggish cathode reaction kinetics and poor anode stability. Herein, the carbon dots (CDs) with ‐OH, ‐NH2, and ‐COOH groups are synthesized and employed as electrolyte ...
Ying Li +9 more
wiley +1 more source
四川大学学报. 自然科学版, 2013 本文讨论了一类含有有限多条切换线的平面Filippov系统极限环在扰动下的保持性.假设该类平面Filippov系统的未扰系统含有一个极限环且它分别与每一条切换线横截相交一次,作者应用Diliberto定理和由此引出的变分引理导出了极限环的特征指标的计算公式,并利用该公式讨论了系统极限环的稳定性及其在扰动下保持的条件.
胡楠
doaj