Results 21 to 30 of about 7,552 (118)
Dizhen xuebao为了充分发挥谱元法和有限差分法各自在数值模拟复杂介质中地震波传播的优点，同时避免各自缺点，本文提出了模拟地震波传播的谱元-有限差分（SEM-FDM）混合方法。该混合方法在起伏地形附近采用谱元法计算地表附近的地震波传播；在远离起伏地形的区域之下，采用有限差分法计算地震波传播；之后通过构建数据交换区实现两种方法的耦合。结果表明，本文提出的谱元-有限差分混合方法能有效地模拟任意非均匀介质中的地震波传播，具有刻画复杂地形的能力，能处理自由地表边界条件，且能适应模型内的速度间断面。通过模型试算，并与谱元法进行对比，
Changzhi Xu +6 more
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International Insolvency Review, Volume 35, Issue 2, Page 406-435, Summer 2026.Abstract Although a local experiment, the promulgation of the Regulations of Shenzhen Special Economic Zone on Personal Bankruptcy (SPBR) in 2020 was hailed as a significant milestone in China's insolvency lawmaking which has thus far addressed only corporate insolvencies.
Jenny Fu, Jin Chun
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Gaoya dianqi, 2005 利用基于边单元的有限元法,对一台200km/h高速电力机车主变压器的油箱损耗进行了三维有限元分析和计算。由于电力机车主变压器是高漏抗,多绕组变压器,经试验（采用放大法）得到该台变压器油箱损耗为31.245kW,使用FEM二维有限元分析法计算结果为45.791kW,而采用三维有限元分析法计算结果为30.478kW。从而表明,采用三维有限元分析能够更加准确地计算主变压器油箱的涡流分布和杂散损耗,为其采取有效的屏蔽措施提供了更加可靠的科学依据。
李季, 罗隆福, 许加柱
doaj
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The electrocatalytic co‐reduction of CO2 and nitrate (NO3− ${\text{NO}}_{3}^{-}$) to synthesize urea presents a sustainable alternative to traditional industrial processes, yet its efficiency is fundamentally limited by the kinetically mismatched activation and coupling of CO2 and NO3− ${\text{NO}}_{3}^{-}$.
Jiayu Liu +9 more
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四川大学学报. 自然科学版, 2013 Darcy-Stokes方程的统一有限元方法是研究Darcy-Stokes耦合问题的基础.尽管该方法采用等阶或低阶有限元逼近在工程计算上有较大的实际应用价值,但这类有限元组合不满足inf-sup条件,因而会造成数值求解的困难.而非协调有限元更容易满足离散的inf-sup条件,因而在计算耦合问题时比协调有限元更具吸引力.本文对Darcy-Stokes方程提出了一种等阶线性非协调稳定化有限元方法,证明了该格式是稳定的,并得到了最优误差估计.
刘程熙, 孔花, 钟纯真
doaj
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Precise and controllable laser wavelength modulation over a broad spectral range in nanoscale devices is pivotal for advancing next‐generation optoelectronic technologies. Herein, we synthesized high‐quality CsPbBr3 nanowires (NWs) via the anti‐solvent method and constructed a CsPbBr3/SiO2/Ag hybrid structure, demonstrating both photonic and ...
Yizun Zhou +10 more
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齿轮可靠度计算的概率有限元法（第Ⅱ部分:齿面接触疲劳强度的计算）
Jixie chuandong, 1993 本文将概率有限元法用于齿轮接触疲劳强度可靠度的计算。以功率、转速和疲劳极限为随机变量,在求解接触问题的有限元—线性规划法基础上,建立了相应的概率有限元基本方程及求解方法。该方法不仅可用于齿轮接触疲劳的可靠度计算,也可用于其他弹性体接触问题的可靠度计算。
吴立言, 刘更, 王步瀛
doaj
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT In this work, In2O3 and three rare earth (RE)‐doped In2O3 composites (Ho, Yb, and Sm‐doped) were prepared via the hydrothermal method. Compared with In2O3 sensors, those fabricated from the three composite materials (RE–In2O3) exhibit varying degrees of enhanced response toward ethylene glycol (EG) gas. At 35% relative humidity (RH) and 250°C,
Chang Liu +9 more
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四川大学学报. 自然科学版, 2010 对于Stokes方程求解问题,作者提出了局部绝对稳定有限元方法.该方法可以看成是Kechkar和Silvester方法从线性/常数元到任意混合元的推广,也可以看成是Douglas和Wang整体绝对稳定化有限元方法的局部稳定化改进.
祁瑞生, 冯民富, 刘丹
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Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT The surging demand for high‐performance NdFeB magnets has made it essential to achieve ultrahigh coercivity while minimizing the consumption of heavy rare earths. To tackle this challenge, this study proposes a Dy/Tb bilayer grain boundary diffusion strategy and systematically investigates the co‐diffusion behavior of Dy and Tb.
Rui Chang +7 more
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